Update dependency org.junit.jupiter:junit-jupiter-api to v5.11.4

Bumps [org.xerial:sqlite-jdbc](https://github.com/xerial/sqlite-jdbc) from 3.45.3.0 to 3.46.0.0.
- [Release notes](https://github.com/xerial/sqlite-jdbc/releases)
- [Changelog](https://github.com/xerial/sqlite-jdbc/blob/master/CHANGELOG)
- [Commits](https://github.com/xerial/sqlite-jdbc/compare/3.45.3.0...3.46.0.0)

---
updated-dependencies:
- dependency-name: org.xerial:sqlite-jdbc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.forgejo/workflows/docker-image.yml

@@ -0,0 +1,47 @@
+name: Publish Docker image
+on:
+  push:
+     branches:
+       - main
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to Forgejo Packages
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v4
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            git.wbrawner.com/wbrawner/twigs
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=sha
+      - name: Set up Docker context
+        run: docker context create builders
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          endpoint: builders
+      - name: Login to Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.wbrawner.com
+          username: ${{ github.actor }}
+          password: ${{ secrets.FORGEJO_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.forgejo/workflows/pull-request.yml

@@ -0,0 +1,26 @@
+name: Pull request workflow
+on: pull_request
+
+jobs:
+  test:
+    name: Build and Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: https://git.wbrawner.com/actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 17
+      - name: Validate Gradle Wrapper
+        uses: https://git.wbrawner.com/gradle/actions/wrapper-validation@v3
+      - name: Build with Gradle
+        uses: https://git.wbrawner.com/gradle/actions/setup-gradle@v3
+        with:
+          arguments: --stacktrace check
+      - name: Publish JUnit Results
+        uses: actions/upload-artifact@v3
+        if: always()
+        with:
+          name: Unit Test Results
+          path: "*/build/test-results/test/*.xml"
+          if-no-files-found: error

.github/workflows/docker-image.yml

@@ -1,9 +1,8 @@
 name: Publish Docker image
 on:
   push:
-    branches: main
+     branches:
-    tags:
+       - main
-        - '*'
 
 jobs:
   push_to_registry:
@@ -11,12 +10,36 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
-      - name: Push to GitHub Packages
+      - name: Docker meta
-        uses: docker/build-push-action@v1
+        id: meta
+        uses: docker/metadata-action@v5
         with:
+          images: |
+            ghcr.io/wbrawner/twigs
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=sha
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-          repository: ${{ github.repository  }}/${{ github.event.repository.name  }}
+      - name: Build and push
-          registry: docker.pkg.github.com
+        uses: docker/build-push-action@v6
-          tag_with_ref: true
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

.github/workflows/pull-request.yml

@@ -0,0 +1,31 @@
+name: Pull request workflow
+on: pull_request
+
+permissions:
+  statuses: write
+  checks: write
+
+jobs:
+  test:
+    name: Build and Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 17
+      - name: Validate Gradle Wrapper
+        uses: gradle/wrapper-validation-action@v3
+      - name: Build with Gradle
+        uses: gradle/gradle-build-action@v3
+        with:
+          arguments: --stacktrace build
+      - name: Publish JUnit Results
+        uses: dorny/test-reporter@v1
+        if: always()
+        with:
+          name: Unit Tests
+          path: "*/build/test-results/test/*.xml"
+          reporter: java-junit
+          fail-on-error: true

.gitignore

@@ -29,3 +29,5 @@ HELP.md
 .vscode/
 .gradle
 *.sql
+
+twigs.db

COPYING

@@ -0,0 +1,661 @@
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+
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+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

Dockerfile

@@ -1,4 +1,4 @@
-FROM openjdk:14-jdk as builder
+FROM ibm-semeru-runtimes:open-21-jdk as builder
 MAINTAINER William Brawner <me@wbrawner.com>
 
 RUN groupadd --system --gid 1000 gradle \
@@ -6,10 +6,12 @@ RUN groupadd --system --gid 1000 gradle \
 
 COPY --chown=gradle:gradle . /home/gradle/src
 WORKDIR /home/gradle/src
-RUN /home/gradle/src/gradlew --console=plain --no-daemon bootJar
+RUN /home/gradle/src/gradlew --console=plain --no-daemon shadowJar
 
-FROM openjdk:14-jdk-slim
+FROM ibm-semeru-runtimes:open-21-jre
 EXPOSE 8080
-COPY --from=builder /home/gradle/src/api/build/libs/api.jar twigs-api.jar
+RUN groupadd --system --gid 1000 twigs \
-CMD /usr/local/openjdk-14/bin/java $JVM_ARGS -jar /twigs-api.jar
+    && useradd --system --gid twigs --uid 1000 --create-home twigs
-
+COPY --from=builder --chown=twigs:twigs /home/gradle/src/app/build/libs/twigs.jar twigs.jar
+USER twigs
+CMD /opt/java/openjdk/bin/java $JVM_ARGS -jar /twigs.jar

LICENSE

@@ -1,8 +1,661 @@
-Copyright 2019 William Patrick Brawner
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
 
-Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
 
-The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+                            Preamble
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
 
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  Developers that use our General Public Licenses protect your rights
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+you this License which gives you legal permission to copy, distribute
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+
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+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
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+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
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+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
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+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
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+option of following the terms and conditions either of that numbered
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+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
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+
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+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
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+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

README.md

@@ -1,24 +1,54 @@
-# Twigs Server
+# Twigs
 
-This is the backend application that powers the [Android](https://github.com/wbrawner/twigs-android), [iOS](https://github.com/wbrawner/twigs-ios), and [web](https://github.com/wbrawner/twigs-web) applications for Twigs, a personal finance/budgeting app. 
+Twigs is a personal finance application tailored to individuals and small groups that want robust budgeting features
+without needing to pay a monthly subscription.
 
 ## Prerequisites
 
-- JDK 14 or newer
+- JDK 17 or newer
-- MySQL 5.7 or newer
+- PostgreSQL 13 or newer
 - (optional) Docker
 
 ## Running
 
-Prior to running the app, make sure you have a MySQL server running, with a database and user ready to go. To avoid the hassle of figuring out how to get it installed locally, using Docker is recommended, and a sample `docker-compose.yml` file is included in the root of the repository. If you already have a MySQL server running, you can run the app from the command line with gradle:
+Prior to running the app, make sure you have a PostgreSQL server running, with a database and user ready to go. To avoid
+the hassle of figuring out how to get it installed locally, using Docker is recommended, and a
+sample `docker-compose.yml` file is included in the root of the repository. If you already have a PostgreSQL server
+running, you can run the app from the command line with gradle:
 
-    ./gradlew bootRun
+    ./gradlew run
 
-By default, twigs will try to connect to the `budget` database on `localhost`, using `budget` as the user and password. To change these values, you can modify the `api/src/main/resources/application.properties` file (but don't commit it!), or better yet, set the appropriate environment variables using the uppercase names and replacing the `.`s with `_`s. For example, to change the `spring.datasource.username` property (the database username), you could set the value in an environment variable called `SPRING_DATASOURCE_USERNAME`.
+## Configuration
+
+Some parameters of Twigs can be configured via environment variables:
+
+| Environment Variable | Default Value | Note                                                    |
+|:--------------------:|:-------------:|:--------------------------------------------------------|
+|     `TWIGS_PORT`     |    `8080`     | Port for web server to listen on                        |
+|   `TWIGS_DB_HOST`    |  `localhost`  | PostgreSQL server host                                  |
+|   `TWIGS_DB_PORT`    |    `5432`     | PostgreSQL server port                                  |
+|   `TWIGS_DB_NAME`    |    `twigs`    | PostgreSQL database name                                |
+|   `TWIGS_DB_USER`    |    `twigs`    | PostgreSQL database user                                |
+|   `TWIGS_DB_PASS`    |    `twigs`    | PostgreSQL database password                            |
+|   `TWIGS_PW_SALT`    |               | Salt to use for password, generated if empty or null    |
+|  `TWIGS_SMTP_FROM`   |               | From email address for automated emails sent from Twigs |
+|  `TWIGS_SMTP_HOST`   |               | SMTP server host for sending emails                     |
+|  `TWIGS_SMTP_PORT`   |               | SMTP server port for sending emails                     |     
+|  `TWIGS_SMTP_USER`   |               | SMTP server username for sending emails                 |
+|  `TWIGS_SMTP_PASS`   |               | SMTP server password for sending emails                 |
 
 ## Building
 
 Building the app is also handled with gradle:
 
-    ./gradlew bootJar
+    ./gradlew shadowJar
 
+## License
+
+Copyright (C) 2019-2024 William Brawner
+
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.

api/build.gradle

@@ -1,31 +0,0 @@
-apply plugin: 'java'
-apply plugin: 'application'
-apply plugin: "io.spring.dependency-management"
-apply plugin: "org.springframework.boot"
-
-repositories {
-    mavenLocal()
-    mavenCentral()
-    maven {
-        url = "http://repo.maven.apache.org/maven2"
-    }
-}
-
-dependencies {
-    implementation "org.springframework.boot:spring-boot-starter-data-jpa"
-    implementation "org.springframework.boot:spring-boot-starter-security"
-    implementation "org.springframework.session:spring-session-jdbc"
-    implementation "org.springframework.boot:spring-boot-starter-web"
-    runtimeOnly "mysql:mysql-connector-java:8.0.15"
-    testImplementation "org.springframework.boot:spring-boot-starter-test"
-    testImplementation "org.springframework.security:spring-security-test:5.1.5.RELEASE"
-}
-
-jar {
-    description = "twigs-server"
-}
-
-mainClassName = "com.wbrawner.budgetserver.TwigsServerApplication"
-
-sourceCompatibility = 14
-targetCompatibility = 14

api/build.gradle.kts

@@ -0,0 +1,18 @@
+plugins {
+    kotlin("jvm")
+    `java-library`
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    api(project(":core"))
+    implementation(project(":service"))
+    implementation(project(":storage"))
+    api(libs.ktor.server.core)
+    api(libs.kotlinx.coroutines.core)
+    testImplementation(project(":testhelpers"))
+}
+
+tasks.getByName<Test>("test") {
+    useJUnitPlatform()
+}

api/src/main/java/com/wbrawner/budgetserver/ErrorResponse.java

@@ -1,13 +0,0 @@
-package com.wbrawner.budgetserver;
-
-public class ErrorResponse {
-    private final String message;
-
-    public ErrorResponse(String message) {
-        this.message = message;
-    }
-
-    public String getMessage() {
-        return message;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/TwigsServerApplication.java

@@ -1,13 +0,0 @@
-package com.wbrawner.budgetserver;
-
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.scheduling.annotation.EnableScheduling;
-
-@SpringBootApplication
-@EnableScheduling
-public class TwigsServerApplication {
-    public static void main(String[] args) {
-        SpringApplication.run(TwigsServerApplication.class, args);
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/Utils.java

@@ -1,66 +0,0 @@
-package com.wbrawner.budgetserver;
-
-import com.wbrawner.budgetserver.user.User;
-import org.springframework.security.core.context.SecurityContextHolder;
-
-import java.security.SecureRandom;
-import java.util.Calendar;
-import java.util.Date;
-import java.util.GregorianCalendar;
-import java.util.Random;
-
-public final class Utils {
-    private static final int[] CALENDAR_FIELDS = new int[]{
-            Calendar.MILLISECOND,
-            Calendar.SECOND,
-            Calendar.MINUTE,
-            Calendar.HOUR_OF_DAY,
-            Calendar.DATE
-    };
-
-    public static Date getFirstOfMonth() {
-        GregorianCalendar calendar = new GregorianCalendar();
-        for (int field : CALENDAR_FIELDS) {
-            calendar.set(field, calendar.getActualMinimum(field));
-        }
-        return calendar.getTime();
-    }
-
-    public static Date getEndOfMonth() {
-        GregorianCalendar calendar = new GregorianCalendar();
-        for (int field : CALENDAR_FIELDS) {
-            calendar.set(field, calendar.getActualMaximum(field));
-        }
-        return calendar.getTime();
-    }
-
-    public static Date twoWeeksFromNow() {
-        GregorianCalendar calendar = new GregorianCalendar();
-        calendar.add(Calendar.DATE, 14);
-        return calendar.getTime();
-    }
-
-    public static User getCurrentUser() {
-        Object user = SecurityContextHolder.getContext().getAuthentication().getPrincipal();
-        if (user instanceof User) {
-            return (User) user;
-        }
-
-        return null;
-    }
-
-    private static final String CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
-    private static final Random random = new SecureRandom();
-
-    public static String randomString(int length) {
-        StringBuilder id = new StringBuilder();
-        for (int i = 0; i < length; i++) {
-            id.append(CHARACTERS.charAt(random.nextInt(CHARACTERS.length())));
-        }
-        return id.toString();
-    }
-
-    public static String randomId() {
-        return randomString(32);
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/budget/Budget.java

@@ -1,82 +0,0 @@
-package com.wbrawner.budgetserver.budget;
-
-import com.wbrawner.budgetserver.category.Category;
-import com.wbrawner.budgetserver.transaction.Transaction;
-
-import javax.persistence.*;
-import java.util.HashSet;
-import java.util.Set;
-import java.util.TreeSet;
-
-import static com.wbrawner.budgetserver.Utils.randomId;
-
-@Entity
-public class Budget {
-    @Id
-    private String id = randomId();
-    private String name;
-    private String description;
-    private String currencyCode;
-    @OneToMany(mappedBy = "budget")
-    private final Set<Transaction> transactions = new TreeSet<>();
-    @OneToMany(mappedBy = "budget")
-    private final Set<Category> categories = new TreeSet<>();
-    @OneToMany(mappedBy = "budget")
-    private final Set<Transaction> users = new HashSet<>();
-
-    public Budget() {}
-
-    public Budget(String name, String description) {
-        this(name, description, "USD");
-    }
-
-    public Budget(String name, String description, String currencyCode) {
-        this.name = name;
-        this.description = description;
-        this.currencyCode = currencyCode;
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public void setId(String id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public void setDescription(String description) {
-        this.description = description;
-    }
-
-    public String getCurrencyCode() {
-        return currencyCode;
-    }
-
-    public void setCurrencyCode(String currencyCode) {
-        this.currencyCode = currencyCode;
-    }
-
-    public Set<Transaction> getTransactions() {
-        return transactions;
-    }
-
-    public Set<Category> getCategories() {
-        return categories;
-    }
-
-    public Set<Transaction> getUsers() {
-        return users;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/budget/BudgetBalanceResponse.java

@@ -1,11 +0,0 @@
-package com.wbrawner.budgetserver.budget;
-
-public class BudgetBalanceResponse {
-    public final String id;
-    public final long balance;
-
-    public BudgetBalanceResponse(String id, long balance) {
-        this.id = id;
-        this.balance = balance;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/budget/BudgetController.java

@@ -1,206 +0,0 @@
-package com.wbrawner.budgetserver.budget;
-
-import com.wbrawner.budgetserver.permission.Permission;
-import com.wbrawner.budgetserver.permission.UserPermission;
-import com.wbrawner.budgetserver.permission.UserPermissionRepository;
-import com.wbrawner.budgetserver.transaction.TransactionRepository;
-import com.wbrawner.budgetserver.user.User;
-import com.wbrawner.budgetserver.user.UserRepository;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.data.domain.PageRequest;
-import org.springframework.http.HttpStatus;
-import org.springframework.http.MediaType;
-import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.*;
-
-import javax.transaction.Transactional;
-import java.time.Instant;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.function.Function;
-import java.util.stream.Collectors;
-
-import static com.wbrawner.budgetserver.Utils.getCurrentUser;
-
-@RestController
-@RequestMapping(value = "/budgets")
-@Transactional
-public class BudgetController {
-    private final BudgetRepository budgetRepository;
-    private final TransactionRepository transactionRepository;
-    private final UserRepository userRepository;
-    private final UserPermissionRepository userPermissionsRepository;
-    private final Logger logger = LoggerFactory.getLogger(BudgetController.class);
-
-    public BudgetController(
-            BudgetRepository budgetRepository,
-            TransactionRepository transactionRepository,
-            UserRepository userRepository,
-            UserPermissionRepository userPermissionsRepository
-    ) {
-        this.budgetRepository = budgetRepository;
-        this.transactionRepository = transactionRepository;
-        this.userRepository = userRepository;
-        this.userPermissionsRepository = userPermissionsRepository;
-    }
-
-    @GetMapping(value = "", produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<List<BudgetResponse>> getBudgets(Integer page, Integer count) {
-        User user = getCurrentUser();
-        if (user == null) {
-            return ResponseEntity.status(401).build();
-        }
-
-        List<BudgetResponse> budgets = userPermissionsRepository.findAllByUser(
-                getCurrentUser(),
-                PageRequest.of(
-                        page != null ? page : 0,
-                        count != null ? count : 1000
-                )
-        )
-                .stream()
-                .map(userPermission -> {
-                    Budget budget = userPermission.getBudget();
-                    if (budget == null) {
-                        return null;
-                    }
-//                    Hibernate.initialize(budget);
-                    return new BudgetResponse(budget, userPermissionsRepository.findAllByBudget(budget, null));
-                })
-                .collect(Collectors.toList());
-
-        return ResponseEntity.ok(budgets);
-    }
-
-    @GetMapping(value = "/{id}", produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<BudgetResponse> getBudget(@PathVariable String id) {
-        return getBudgetWithPermission(id, Permission.READ, (budget) ->
-                ResponseEntity.ok(new BudgetResponse(budget, userPermissionsRepository.findAllByBudget(budget, null)))
-        );
-    }
-
-    @GetMapping(value = "/{id}/balance", produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<BudgetBalanceResponse> getBudgetBalance(
-            @PathVariable String id,
-            @RequestParam(value = "from", required = false) String from,
-            @RequestParam(value = "to", required = false) String to
-    ) {
-        return getBudgetWithPermission(id, Permission.READ, (budget) -> {
-            Instant fromInstant;
-            try {
-                fromInstant = Instant.parse(from);
-            } catch (Exception e) {
-                if (!(e instanceof NullPointerException))
-                    logger.error("Failed to parse '" + from + "' to Instant for 'from' parameter", e);
-                fromInstant = Instant.ofEpochSecond(0);
-            }
-            Instant toInstant;
-            try {
-                toInstant = Instant.parse(to);
-            } catch (Exception e) {
-                if (!(e instanceof NullPointerException))
-                    logger.error("Failed to parse '" + to + "' to Instant for 'to' parameter", e);
-                toInstant = Instant.now();
-            }
-            var balance = transactionRepository.sumBalanceByBudgetId(budget.getId(), fromInstant, toInstant);
-            return ResponseEntity.ok(new BudgetBalanceResponse(budget.getId(), balance));
-        });
-    }
-
-    @PostMapping(value = "", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<BudgetResponse> newBudget(@RequestBody BudgetRequest request) {
-        final var budget = budgetRepository.save(new Budget(request.name, request.description));
-        var users = request.getUsers()
-                .stream()
-                .map(userPermissionRequest -> {
-                    var user = userRepository.findById(userPermissionRequest.getUser()).orElse(null);
-                    if (user == null) {
-                        return null;
-                    }
-
-                    return userPermissionsRepository.save(
-                            new UserPermission(budget, user, userPermissionRequest.getPermission())
-                    );
-                })
-                .collect(Collectors.toSet());
-
-        var currentUserIncluded = users.stream().anyMatch(userPermission ->
-                userPermission.getUser().getId().equals(getCurrentUser().getId())
-        );
-        if (!currentUserIncluded) {
-            users.add(
-                    userPermissionsRepository.save(
-                            new UserPermission(budget, getCurrentUser(), Permission.OWNER)
-                    )
-            );
-        }
-        return ResponseEntity.ok(new BudgetResponse(budget, new ArrayList<>(users)));
-    }
-
-    @PutMapping(value = "/{id}", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<BudgetResponse> updateBudget(@PathVariable String id, @RequestBody BudgetRequest request) {
-        return getBudgetWithPermission(id, Permission.MANAGE, (budget) -> {
-            if (request.name != null) {
-                budget.setName(request.name);
-            }
-
-            if (request.description != null) {
-                budget.setDescription(request.description);
-            }
-
-            var users = new ArrayList<UserPermission>();
-            if (!request.getUsers().isEmpty()) {
-                request.getUsers().forEach(userPermissionRequest ->
-                        userRepository.findById(userPermissionRequest.getUser()).ifPresent(requestedUser ->
-                                users.add(userPermissionsRepository.save(
-                                        new UserPermission(
-                                                budget,
-                                                requestedUser,
-                                                userPermissionRequest.getPermission()
-                                        )
-                                ))
-                        ));
-            } else {
-                users.addAll(userPermissionsRepository.findAllByBudget(budget, null));
-            }
-
-            return ResponseEntity.ok(new BudgetResponse(budgetRepository.save(budget), users));
-        });
-    }
-
-    @DeleteMapping(value = "/{id}", produces = {MediaType.TEXT_PLAIN_VALUE})
-    public ResponseEntity<Void> deleteBudget(@PathVariable String id) {
-        return getBudgetWithPermission(id, Permission.MANAGE, (budget) -> {
-            budgetRepository.delete(budget);
-            return ResponseEntity.ok().build();
-        });
-    }
-
-    private <T> ResponseEntity<T> getBudgetWithPermission(
-            String budgetId,
-            Permission permission,
-            Function<Budget, ResponseEntity<T>> callback
-    ) {
-        var user = getCurrentUser();
-        if (user == null) {
-            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
-        }
-
-        var userPermission = userPermissionsRepository.findByUserAndBudget_Id(user, budgetId).orElse(null);
-        if (userPermission == null) {
-            return ResponseEntity.notFound().build();
-        }
-
-        if (userPermission.getPermission().isNotAtLeast(permission)) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-
-        var budget = userPermission.getBudget();
-        if (budget == null) {
-            return ResponseEntity.notFound().build();
-        }
-
-        return callback.apply(budget);
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/budget/BudgetRepository.java

@@ -1,6 +0,0 @@
-package com.wbrawner.budgetserver.budget;
-
-import org.springframework.data.repository.PagingAndSortingRepository;
-
-public interface BudgetRepository extends PagingAndSortingRepository<Budget, String> {
-}

api/src/main/java/com/wbrawner/budgetserver/budget/BudgetRequest.java

@@ -1,28 +0,0 @@
-package com.wbrawner.budgetserver.budget;
-
-import com.wbrawner.budgetserver.permission.UserPermissionRequest;
-
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Set;
-
-public class BudgetRequest {
-    public final String name;
-    public final String description;
-    private final Set<UserPermissionRequest> users = new HashSet<>();
-
-    public BudgetRequest() {
-        // Required empty constructor
-        this("", "", Collections.emptySet());
-    }
-
-    public BudgetRequest(String name, String description, Set<UserPermissionRequest> users) {
-        this.name = name;
-        this.description = description;
-        this.users.addAll(users);
-    }
-
-    public Set<UserPermissionRequest> getUsers() {
-        return Set.copyOf(users);
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/budget/BudgetResponse.java

@@ -1,38 +0,0 @@
-package com.wbrawner.budgetserver.budget;
-
-import com.wbrawner.budgetserver.permission.UserPermission;
-import com.wbrawner.budgetserver.permission.UserPermissionResponse;
-import com.wbrawner.budgetserver.user.User;
-
-import java.util.List;
-import java.util.Objects;
-import java.util.stream.Collectors;
-
-public class BudgetResponse {
-    public final String id;
-    public final String name;
-    public final String description;
-    private final List<UserPermissionResponse> users;
-
-    public BudgetResponse(String id, String name, String description, List<UserPermissionResponse> users) {
-        this.id = id;
-        this.name = name;
-        this.description = description;
-        this.users = users;
-    }
-
-    public BudgetResponse(Budget budget, List<UserPermission> users) {
-        this(
-                Objects.requireNonNull(budget.getId()),
-                budget.getName(),
-                budget.getDescription(),
-                users.stream()
-                        .map(UserPermissionResponse::new)
-                        .collect(Collectors.toList())
-        );
-    }
-
-    public List<UserPermissionResponse> getUsers() {
-        return List.copyOf(users);
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/category/Category.java

@@ -1,98 +0,0 @@
-package com.wbrawner.budgetserver.category;
-
-import com.wbrawner.budgetserver.budget.Budget;
-
-import javax.persistence.*;
-import java.util.UUID;
-
-import static com.wbrawner.budgetserver.Utils.randomId;
-
-@Entity
-public class Category implements Comparable<Category> {
-    @Id
-    private final String id = randomId();
-    private String title;
-    private String description;
-    private long amount;
-    @JoinColumn(nullable = false)
-    @ManyToOne
-    private Budget budget;
-    private boolean expense;
-    @Column(nullable = false, columnDefinition = "boolean default false")
-    private boolean archived;
-
-    public Category() {
-        this(null, null, 0L, null, true);
-    }
-
-    public Category(
-            String title,
-            String description,
-            Long amount,
-            Budget budget,
-            boolean expense
-    ) {
-        this.title = title;
-        this.description = description;
-        this.amount = amount;
-        this.budget = budget;
-        this.expense = expense;
-    }
-
-    @Override
-    public int compareTo(Category other) {
-        return title.compareTo(other.title);
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public void setTitle(String title) {
-        this.title = title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public void setDescription(String description) {
-        this.description = description;
-    }
-
-    public long getAmount() {
-        return amount;
-    }
-
-    public void setAmount(long amount) {
-        this.amount = amount;
-    }
-
-    public Budget getBudget() {
-        return budget;
-    }
-
-    public void setBudget(Budget budget) {
-        this.budget = budget;
-    }
-
-    public boolean isExpense() {
-        return expense;
-    }
-
-    public void setExpense(boolean expense) {
-        this.expense = expense;
-    }
-
-    public boolean isArchived() {
-        return archived;
-    }
-
-    public void setArchived(boolean archived) {
-        this.archived = archived;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/category/CategoryBalanceResponse.java

@@ -1,19 +0,0 @@
-package com.wbrawner.budgetserver.category;
-
-public class CategoryBalanceResponse {
-    private final String id;
-    private final long balance;
-
-    public CategoryBalanceResponse(String id, long balance) {
-        this.id = id;
-        this.balance = balance;
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public long getBalance() {
-        return balance;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/category/CategoryController.java

@@ -1,166 +0,0 @@
-package com.wbrawner.budgetserver.category;
-
-import com.wbrawner.budgetserver.ErrorResponse;
-import com.wbrawner.budgetserver.permission.Permission;
-import com.wbrawner.budgetserver.permission.UserPermission;
-import com.wbrawner.budgetserver.permission.UserPermissionRepository;
-import com.wbrawner.budgetserver.transaction.TransactionRepository;
-import org.springframework.data.domain.PageRequest;
-import org.springframework.data.domain.Sort;
-import org.springframework.http.HttpStatus;
-import org.springframework.http.MediaType;
-import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.*;
-
-import javax.transaction.Transactional;
-import java.util.List;
-import java.util.stream.Collectors;
-
-import static com.wbrawner.budgetserver.Utils.getCurrentUser;
-import static com.wbrawner.budgetserver.Utils.getFirstOfMonth;
-
-@RestController
-@RequestMapping(path = "/categories")
-@Transactional
-class CategoryController {
-    private final CategoryRepository categoryRepository;
-    private final TransactionRepository transactionRepository;
-    private final UserPermissionRepository userPermissionsRepository;
-
-    CategoryController(CategoryRepository categoryRepository,
-                       TransactionRepository transactionRepository,
-                       UserPermissionRepository userPermissionsRepository) {
-        this.categoryRepository = categoryRepository;
-        this.transactionRepository = transactionRepository;
-        this.userPermissionsRepository = userPermissionsRepository;
-    }
-
-    @GetMapping(path = "", produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<List<CategoryResponse>> getCategories(
-            @RequestParam(name = "budgetIds", required = false) List<String> budgetIds,
-            @RequestParam(name = "isExpense", required = false) Boolean isExpense,
-            @RequestParam(name = "includeArchived", required = false) Boolean includeArchived,
-            @RequestParam(name = "count", required = false) Integer count,
-            @RequestParam(name = "page", required = false) Integer page,
-            @RequestParam(name = "false", required = false) String sortBy,
-            @RequestParam(name = "sortOrder", required = false) Sort.Direction sortOrder
-    ) {
-        List<UserPermission> userPermissions;
-        if (budgetIds != null && !budgetIds.isEmpty()) {
-            userPermissions = userPermissionsRepository.findAllByUserAndBudget_IdIn(
-                    getCurrentUser(),
-                    budgetIds,
-                    PageRequest.of(page != null ? page : 0, count != null ? count : 1000)
-            );
-        } else {
-            userPermissions = userPermissionsRepository.findAllByUser(getCurrentUser(), null);
-        }
-        var budgets = userPermissions.stream()
-                .map(UserPermission::getBudget)
-                .collect(Collectors.toList());
-
-        var pageRequest = PageRequest.of(
-                Math.min(0, page != null ? page - 1 : 0),
-                count != null ? count : 1000,
-                sortOrder != null ? sortOrder : Sort.Direction.ASC,
-                sortBy != null ? sortBy : "title"
-        );
-        Boolean archived = includeArchived == null || includeArchived == false ? false : null;
-        List<Category> categories = categoryRepository.findAllByBudgetIn(budgets, isExpense, archived, pageRequest);
-        return ResponseEntity.ok(
-                categories.stream()
-                        .map(CategoryResponse::new)
-                        .collect(Collectors.toList())
-        );
-    }
-
-    @GetMapping(path = "/{id}", produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<CategoryResponse> getCategory(@PathVariable String id) {
-        var budgets = userPermissionsRepository.findAllByUser(getCurrentUser(), null)
-                .stream()
-                .map(UserPermission::getBudget)
-                .collect(Collectors.toList());
-        var category = categoryRepository.findByBudgetInAndId(budgets, id).orElse(null);
-        if (category == null) return ResponseEntity.notFound().build();
-        return ResponseEntity.ok(new CategoryResponse(category));
-    }
-
-    @GetMapping(path = "/{id}/balance", produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<CategoryBalanceResponse> getCategoryBalance(@PathVariable String id) {
-        var budgets = userPermissionsRepository.findAllByUser(getCurrentUser(), null)
-                .stream()
-                .map(UserPermission::getBudget)
-                .collect(Collectors.toList());
-        var category = categoryRepository.findByBudgetInAndId(budgets, id).orElse(null);
-        if (category == null) {
-            return ResponseEntity.notFound().build();
-        }
-        var sum = transactionRepository.sumBalanceByCategoryId(category.getId(), getFirstOfMonth());
-        return ResponseEntity.ok(new CategoryBalanceResponse(category.getId(), sum));
-    }
-
-    @PostMapping(path = "", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<Object> newCategory(@RequestBody NewCategoryRequest request) {
-        var userResponse = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), request.getBudgetId())
-                .orElse(null);
-        if (userResponse == null) {
-            return ResponseEntity.badRequest().body(new ErrorResponse("Invalid budget ID"));
-        }
-        if (userResponse.getPermission().isNotAtLeast(Permission.WRITE)) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-        var budget = userResponse.getBudget();
-        return ResponseEntity.ok(new CategoryResponse(categoryRepository.save(new Category(
-                request.getTitle(),
-                request.getDescription(),
-                request.getAmount(),
-                budget,
-                request.getExpense()
-        ))));
-    }
-
-    @PutMapping(path = "/{id}", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<CategoryResponse> updateCategory(@PathVariable String id, @RequestBody UpdateCategoryRequest request) {
-        var category = categoryRepository.findById(id).orElse(null);
-        if (category == null) return ResponseEntity.notFound().build();
-        var userPermission = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), category.getBudget().getId()).orElse(null);
-        if (userPermission == null) return ResponseEntity.notFound().build();
-        if (userPermission.getPermission().isNotAtLeast(Permission.WRITE)) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-        if (request.getTitle() != null) {
-            category.setTitle(request.getTitle());
-        }
-        if (request.getDescription() != null) {
-            category.setDescription(request.getDescription());
-        }
-        if (request.getAmount() != null) {
-            category.setAmount(request.getAmount());
-        }
-        if (request.getExpense() != null) {
-            category.setExpense(request.getExpense());
-        }
-        if (request.getArchived() != null) {
-            category.setArchived(request.getArchived());
-        }
-        return ResponseEntity.ok(new CategoryResponse(categoryRepository.save(category)));
-    }
-
-    @DeleteMapping(path = "/{id}", produces = {MediaType.TEXT_PLAIN_VALUE})
-    ResponseEntity<Void> deleteCategory(@PathVariable String id) {
-        var category = categoryRepository.findById(id).orElse(null);
-        if (category == null) return ResponseEntity.notFound().build();
-        var userPermission = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), category.getBudget().getId()).orElse(null);
-        if (userPermission == null) return ResponseEntity.notFound().build();
-        if (userPermission.getPermission().isNotAtLeast(Permission.WRITE)) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-        transactionRepository.findAllByBudgetAndCategory(userPermission.getBudget(), category)
-                .forEach(transaction -> {
-                    transaction.setCategory(null);
-                    transactionRepository.save(transaction);
-                });
-        categoryRepository.delete(category);
-        return ResponseEntity.ok().build();
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/category/CategoryRepository.java

@@ -1,23 +0,0 @@
-package com.wbrawner.budgetserver.category;
-
-import com.wbrawner.budgetserver.budget.Budget;
-
-import org.springframework.data.domain.Pageable;
-import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.PagingAndSortingRepository;
-
-import java.util.List;
-import java.util.Optional;
-
-public interface CategoryRepository extends PagingAndSortingRepository<Category, String> {
-    List<Category> findAllByBudget(Budget budget, Pageable pageable);
-
-    @Query("SELECT c FROM Category c where c.budget IN (:budgets) AND (:expense IS NULL OR c.expense = :expense) AND (:archived IS NULL OR c.archived = :archived)")
-    List<Category> findAllByBudgetIn(List<Budget> budgets, Boolean expense, Boolean archived, Pageable pageable);
-
-    Optional<Category> findByBudgetInAndId(List<Budget> budgets, String id);
-
-    Optional<Category> findByBudgetAndId(Budget budget, String id);
-
-    List<Category> findAllByBudgetInAndIdIn(List<Budget> budgets, List<String> ids, Pageable pageable);
-}

api/src/main/java/com/wbrawner/budgetserver/category/CategoryResponse.java

@@ -1,63 +0,0 @@
-package com.wbrawner.budgetserver.category;
-
-import java.util.Objects;
-
-public class CategoryResponse {
-    private final String id;
-    private final String title;
-    private final String description;
-    private final long amount;
-    private final String budgetId;
-    private final boolean expense;
-    private final boolean archived;
-
-    public CategoryResponse(Category category) {
-        this(
-                Objects.requireNonNull(category.getId()),
-                category.getTitle(),
-                category.getDescription(),
-                category.getAmount(),
-                Objects.requireNonNull(category.getBudget()).getId(),
-                category.isExpense(),
-                category.isArchived()
-        );
-    }
-
-    public CategoryResponse(String id, String title, String description, long amount, String budgetId, boolean expense, boolean archived) {
-        this.id = id;
-        this.title = title;
-        this.description = description;
-        this.amount = amount;
-        this.budgetId = budgetId;
-        this.expense = expense;
-        this.archived = archived;
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public long getAmount() {
-        return amount;
-    }
-
-    public String getBudgetId() {
-        return budgetId;
-    }
-
-    public boolean isExpense() {
-        return expense;
-    }
-
-    public boolean isArchived() {
-        return archived;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/category/NewCategoryRequest.java

@@ -1,41 +0,0 @@
-package com.wbrawner.budgetserver.category;
-
-public class NewCategoryRequest {
-    private final String title;
-    private final String description;
-    private final Long amount;
-    private final String budgetId;
-    private final Boolean expense;
-
-    public NewCategoryRequest() {
-        this(null, null, null, null, null);
-    }
-
-    public NewCategoryRequest(String title, String description, Long amount, String budgetId, Boolean expense) {
-        this.title = title;
-        this.description = description;
-        this.amount = amount;
-        this.budgetId = budgetId;
-        this.expense = expense;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public Long getAmount() {
-        return amount;
-    }
-
-    public String getBudgetId() {
-        return budgetId;
-    }
-
-    public Boolean getExpense() {
-        return expense;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/category/UpdateCategoryRequest.java

@@ -1,41 +0,0 @@
-package com.wbrawner.budgetserver.category;
-
-public class UpdateCategoryRequest {
-    private final String title;
-    private final String description;
-    private final Long amount;
-    private final Boolean expense;
-    private final Boolean archived;
-
-    public UpdateCategoryRequest() {
-        this(null, null, null, null, null);
-    }
-
-    public UpdateCategoryRequest(String title, String description, Long amount, Boolean expense, Boolean archived) {
-        this.title = title;
-        this.description = description;
-        this.amount = amount;
-        this.expense = expense;
-        this.archived = archived;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public Long getAmount() {
-        return amount;
-    }
-
-    public Boolean getExpense() {
-        return expense;
-    }
-
-    public Boolean getArchived() {
-        return archived;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/config/JdbcUserDetailsService.java

@@ -1,32 +0,0 @@
-package com.wbrawner.budgetserver.config;
-
-import com.wbrawner.budgetserver.user.UserRepository;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.security.core.userdetails.UserDetails;
-import org.springframework.security.core.userdetails.UserDetailsService;
-import org.springframework.security.core.userdetails.UsernameNotFoundException;
-import org.springframework.stereotype.Component;
-
-@Component
-public class JdbcUserDetailsService implements UserDetailsService {
-
-    private final UserRepository userRepository;
-
-    @Autowired
-    public JdbcUserDetailsService(UserRepository userRepository) {
-        this.userRepository = userRepository;
-    }
-
-    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
-        UserDetails userDetails;
-        userDetails = userRepository.findByUsername(username).orElse(null);
-        if (userDetails != null) {
-            return userDetails;
-        }
-        userDetails = userRepository.findByEmail(username).orElse(null);
-        if (userDetails != null) {
-            return userDetails;
-        }
-        throw new UsernameNotFoundException("Unable to find user with username $username");
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/config/MethodSecurity.java

@@ -1,10 +0,0 @@
-package com.wbrawner.budgetserver.config;
-
-import org.springframework.context.annotation.Configuration;
-import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
-import org.springframework.security.config.annotation.method.configuration.GlobalMethodSecurityConfiguration;
-
-@Configuration
-@EnableGlobalMethodSecurity(prePostEnabled = true)
-public class MethodSecurity extends GlobalMethodSecurityConfiguration {
-}

api/src/main/java/com/wbrawner/budgetserver/config/SecurityConfig.java

@@ -1,118 +0,0 @@
-package com.wbrawner.budgetserver.config;
-
-import com.wbrawner.budgetserver.passwordresetrequest.PasswordResetRequestRepository;
-import com.wbrawner.budgetserver.session.UserSessionRepository;
-import com.wbrawner.budgetserver.user.UserRepository;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.core.env.Environment;
-import org.springframework.http.HttpMethod;
-import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
-import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
-import org.springframework.security.config.annotation.web.builders.HttpSecurity;
-import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
-import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
-import org.springframework.security.config.http.SessionCreationPolicy;
-import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
-import org.springframework.security.crypto.password.PasswordEncoder;
-import org.springframework.security.provisioning.JdbcUserDetailsManager;
-import org.springframework.web.cors.CorsConfiguration;
-
-import javax.sql.DataSource;
-import java.util.Arrays;
-import java.util.stream.Collectors;
-import java.util.stream.Stream;
-
-
-@Configuration
-@EnableWebSecurity
-public class SecurityConfig extends WebSecurityConfigurerAdapter {
-
-    private final Environment env;
-    private final DataSource datasource;
-    private final UserSessionRepository userSessionRepository;
-    private final UserRepository userRepository;
-    private final PasswordResetRequestRepository passwordResetRequestRepository;
-    private final JdbcUserDetailsService userDetailsService;
-    private final Environment environment;
-
-    public SecurityConfig(Environment env,
-                          DataSource datasource,
-                          UserSessionRepository userSessionRepository,
-                          UserRepository userRepository,
-                          PasswordResetRequestRepository passwordResetRequestRepository,
-                          JdbcUserDetailsService userDetailsService,
-                          Environment environment) {
-        this.env = env;
-        this.datasource = datasource;
-        this.userSessionRepository = userSessionRepository;
-        this.userRepository = userRepository;
-        this.passwordResetRequestRepository = passwordResetRequestRepository;
-        this.userDetailsService = userDetailsService;
-        this.environment = environment;
-    }
-
-    @Bean
-    public JdbcUserDetailsManager getUserDetailsManager() {
-        var userDetailsManager = new JdbcUserDetailsManager();
-        userDetailsManager.setDataSource(datasource);
-        return userDetailsManager;
-    }
-
-    @Bean
-    public DaoAuthenticationProvider getAuthenticationProvider() {
-        var authProvider = new TokenAuthenticationProvider(userSessionRepository, userRepository);
-        authProvider.setPasswordEncoder(getPasswordEncoder());
-        authProvider.setUserDetailsService(userDetailsService);
-        return authProvider;
-    }
-
-    @Bean
-    public PasswordEncoder getPasswordEncoder() {
-        return new BCryptPasswordEncoder();
-    }
-
-    @Override
-    public void configure(AuthenticationManagerBuilder auth) {
-        auth.authenticationProvider(getAuthenticationProvider());
-    }
-
-    @Override
-    public void configure(HttpSecurity http) throws Exception {
-        http.authorizeRequests()
-                .antMatchers("/users/new", "/users/login")
-                .permitAll()
-                .anyRequest()
-                .authenticated()
-                .and()
-                .httpBasic()
-                .authenticationEntryPoint(new SilentAuthenticationEntryPoint())
-                .and()
-                .cors()
-                .configurationSource(request -> {
-                    var corsConfig = new CorsConfiguration();
-                    corsConfig.applyPermitDefaultValues();
-                    var corsDomains = environment.getProperty("twigs.cors.domains", "*");
-                    corsConfig.setAllowedOrigins(Arrays.asList(corsDomains.split(",")));
-                    corsConfig.setAllowedMethods(
-                            Stream.of(
-                                    HttpMethod.GET,
-                                    HttpMethod.POST,
-                                    HttpMethod.PUT,
-                                    HttpMethod.DELETE,
-                                    HttpMethod.OPTIONS
-                            )
-                                    .map(Enum::name)
-                                    .collect(Collectors.toList())
-                    );
-                    corsConfig.setAllowCredentials(true);
-                    return corsConfig;
-                })
-                .and()
-                .csrf()
-                .disable()
-                .addFilter(new TokenAuthenticationFilter(authenticationManager()))
-                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
-    }
-}
-

api/src/main/java/com/wbrawner/budgetserver/config/SessionAuthenticationToken.java

@@ -1,20 +0,0 @@
-package com.wbrawner.budgetserver.config;
-
-import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
-import org.springframework.security.core.GrantedAuthority;
-
-import java.util.Collection;
-
-public class SessionAuthenticationToken extends UsernamePasswordAuthenticationToken {
-    /**
-     * Creates a token with the supplied array of authorities.
-     *
-     * @param authorities the collection of <tt>GrantedAuthority</tt>s for the principal
-     *                    represented by this authentication object.
-     * @param credentials
-     * @param principal
-     */
-    public SessionAuthenticationToken(Object principal, Object credentials, Collection<? extends GrantedAuthority> authorities) {
-        super(principal, credentials, authorities);
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/config/SilentAuthenticationEntryPoint.java

@@ -1,19 +0,0 @@
-package com.wbrawner.budgetserver.config;
-
-import org.springframework.security.core.AuthenticationException;
-import org.springframework.security.web.AuthenticationEntryPoint;
-
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-
-/**
- * Used to avoid browser prompts for authentication
- */
-public class SilentAuthenticationEntryPoint implements AuthenticationEntryPoint {
-    @Override
-    public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException, ServletException {
-        response.sendError(HttpServletResponse.SC_UNAUTHORIZED, authException.getMessage());
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/config/TokenAuthenticationFilter.java

@@ -1,32 +0,0 @@
-package com.wbrawner.budgetserver.config;
-
-import org.springframework.security.authentication.AuthenticationManager;
-import org.springframework.security.core.context.SecurityContextHolder;
-import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;
-
-import javax.servlet.FilterChain;
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-import java.io.IOException;
-import java.util.Collections;
-
-public class TokenAuthenticationFilter extends BasicAuthenticationFilter {
-
-    public TokenAuthenticationFilter(AuthenticationManager authenticationManager) {
-        super(authenticationManager);
-    }
-
-    @Override
-    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
-        var authHeader = request.getHeader("Authorization");
-        if (authHeader == null || !authHeader.startsWith("Bearer ")) {
-            chain.doFilter(request, response);
-            return;
-        }
-        var token = authHeader.substring(7);
-        var authentication = getAuthenticationManager().authenticate(new SessionAuthenticationToken(null, token, Collections.emptyList()));
-        SecurityContextHolder.getContext().setAuthentication(authentication);
-        chain.doFilter(request, response);
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/config/TokenAuthenticationProvider.java

@@ -1,56 +0,0 @@
-package com.wbrawner.budgetserver.config;
-
-import com.wbrawner.budgetserver.session.UserSessionRepository;
-import com.wbrawner.budgetserver.user.UserRepository;
-import org.springframework.security.authentication.BadCredentialsException;
-import org.springframework.security.authentication.InternalAuthenticationServiceException;
-import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
-import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
-import org.springframework.security.core.Authentication;
-import org.springframework.security.core.AuthenticationException;
-import org.springframework.security.core.userdetails.UserDetails;
-
-import java.util.Date;
-
-import static com.wbrawner.budgetserver.Utils.twoWeeksFromNow;
-
-public class TokenAuthenticationProvider extends DaoAuthenticationProvider {
-    private final UserSessionRepository userSessionRepository;
-    private final UserRepository userRepository;
-
-    public TokenAuthenticationProvider(UserSessionRepository userSessionRepository, UserRepository userRepository) {
-        this.userSessionRepository = userSessionRepository;
-        this.userRepository = userRepository;
-    }
-
-    @Override
-    protected void additionalAuthenticationChecks(UserDetails userDetails, UsernamePasswordAuthenticationToken authentication) throws AuthenticationException {
-        if (!(authentication instanceof SessionAuthenticationToken)) {
-            // Additional checks aren't needed since they've already been handled
-            super.additionalAuthenticationChecks(userDetails, authentication);
-        }
-    }
-
-    @Override
-    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
-        if (authentication instanceof SessionAuthenticationToken) {
-            var session = userSessionRepository.findByToken((String) authentication.getCredentials());
-            if (session.isEmpty() || session.get().getExpiration().before(new Date())) {
-                throw new BadCredentialsException("Credentials expired");
-            }
-            var user = userRepository.findById(session.get().getUserId());
-            if (user.isEmpty()) {
-                throw new InternalAuthenticationServiceException("Failed to find user for token");
-            }
-            new Thread(() -> {
-                // Update the session on a background thread to avoid holding up the request longer than necessary
-                var updatedSession = session.get();
-                updatedSession.setExpiration(twoWeeksFromNow());
-                userSessionRepository.save(updatedSession);
-            }).start();
-            return new SessionAuthenticationToken(user.get(), authentication.getCredentials(), authentication.getAuthorities());
-        } else {
-            return super.authenticate(authentication);
-        }
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/passwordresetrequest/PasswordResetRequest.java

@@ -1,38 +0,0 @@
-package com.wbrawner.budgetserver.passwordresetrequest;
-
-import com.wbrawner.budgetserver.user.User;
-
-import javax.persistence.*;
-import java.util.Calendar;
-import java.util.GregorianCalendar;
-import java.util.UUID;
-
-import static com.wbrawner.budgetserver.Utils.randomId;
-
-@Entity
-public class PasswordResetRequest {
-    @Id
-    private final String id = randomId();
-    @ManyToOne
-    private final User user;
-    private final Calendar date;
-    private final String token;
-
-    public PasswordResetRequest() {
-        this(null);
-    }
-
-    public PasswordResetRequest(User user) {
-        this(user, new GregorianCalendar(), randomId());
-    }
-
-    public PasswordResetRequest(
-            User user,
-            Calendar date,
-            String token
-    ) {
-        this.user = user;
-        this.date = date;
-        this.token = token;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/passwordresetrequest/PasswordResetRequestRepository.java

@@ -1,6 +0,0 @@
-package com.wbrawner.budgetserver.passwordresetrequest;
-
-import org.springframework.data.repository.PagingAndSortingRepository;
-
-public interface PasswordResetRequestRepository extends PagingAndSortingRepository<PasswordResetRequest, Long> {
-}

api/src/main/java/com/wbrawner/budgetserver/permission/UserPermission.java

@@ -1,54 +0,0 @@
-package com.wbrawner.budgetserver.permission;
-
-import com.wbrawner.budgetserver.budget.Budget;
-import com.wbrawner.budgetserver.user.User;
-
-import javax.persistence.*;
-
-@Entity
-public class UserPermission {
-    @EmbeddedId
-    private UserPermissionKey id;
-    @ManyToOne
-    @MapsId("budgetId")
-    @JoinColumn(nullable = false, name = "budget_id")
-    private Budget budget;
-    @ManyToOne
-    @MapsId("userId")
-    @JoinColumn(nullable = false, name = "user_id")
-    private User user;
-    @JoinColumn(nullable = false)
-    @Enumerated(EnumType.STRING)
-    private Permission permission;
-
-    public UserPermission() {
-        this(null, null, null, null);
-    }
-
-    public UserPermission(Budget budget, User user, Permission permission) {
-        this(new UserPermissionKey(budget.getId(), user.getId()), budget, user, permission);
-    }
-
-    public UserPermission(UserPermissionKey userPermissionKey, Budget budget, User user, Permission permission) {
-        this.id = userPermissionKey;
-        this.budget = budget;
-        this.user = user;
-        this.permission = permission;
-    }
-
-    public UserPermissionKey getId() {
-        return id;
-    }
-
-    public Budget getBudget() {
-        return budget;
-    }
-
-    public User getUser() {
-        return user;
-    }
-
-    public Permission getPermission() {
-        return permission;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/permission/UserPermissionKey.java

@@ -1,19 +0,0 @@
-package com.wbrawner.budgetserver.permission;
-
-import javax.persistence.Embeddable;
-import java.io.Serializable;
-
-@Embeddable
-public class UserPermissionKey implements Serializable {
-    private final String budgetId;
-    private final String userId;
-
-    public UserPermissionKey() {
-        this(null, null);
-    }
-
-    public UserPermissionKey(String budgetId, String userId) {
-        this.budgetId = budgetId;
-        this.userId = userId;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/permission/UserPermissionRepository.java

@@ -1,21 +0,0 @@
-package com.wbrawner.budgetserver.permission;
-
-import com.wbrawner.budgetserver.budget.Budget;
-import com.wbrawner.budgetserver.user.User;
-import org.springframework.data.domain.Pageable;
-import org.springframework.data.repository.PagingAndSortingRepository;
-
-import java.util.List;
-import java.util.Optional;
-
-public interface UserPermissionRepository extends PagingAndSortingRepository<UserPermission, UserPermissionKey> {
-    Optional<UserPermission> findByUserAndBudget_Id(User user, String budgetId);
-
-    List<UserPermission> findAllByUser(User user, Pageable pageable);
-
-    List<UserPermission> findAllByBudget(Budget budget, Pageable pageable);
-
-    List<UserPermission> findAllByUserAndBudget(User user, Budget budget, Pageable pageable);
-
-    List<UserPermission> findAllByUserAndBudget_IdIn(User user, List<String> budgetIds, Pageable pageable);
-}

api/src/main/java/com/wbrawner/budgetserver/permission/UserPermissionRequest.java

@@ -1,23 +0,0 @@
-package com.wbrawner.budgetserver.permission;
-
-public class UserPermissionRequest {
-    private final String user;
-    private final Permission permission;
-
-    public UserPermissionRequest() {
-        this(null, Permission.READ);
-    }
-
-    public UserPermissionRequest(String user, Permission permission) {
-        this.user = user;
-        this.permission = permission;
-    }
-
-    public String getUser() {
-        return user;
-    }
-
-    public Permission getPermission() {
-        return permission;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/permission/UserPermissionResponse.java

@@ -1,25 +0,0 @@
-package com.wbrawner.budgetserver.permission;
-
-import com.wbrawner.budgetserver.user.UserResponse;
-
-public class UserPermissionResponse {
-    private final UserResponse user;
-    private final Permission permission;
-
-    public UserPermissionResponse(UserPermission userPermission) {
-        this(new UserResponse(userPermission.getUser()), userPermission.getPermission());
-    }
-
-    public UserPermissionResponse(UserResponse userResponse, Permission permission) {
-        this.user = userResponse;
-        this.permission = permission;
-    }
-
-    public UserResponse getUser() {
-        return user;
-    }
-
-    public Permission getPermission() {
-        return permission;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/recurrence/RecurringTransaction.java

@@ -1,184 +0,0 @@
-package com.wbrawner.budgetserver.recurrence;
-
-import com.wbrawner.budgetserver.budget.Budget;
-import com.wbrawner.budgetserver.category.Category;
-import com.wbrawner.budgetserver.user.User;
-
-import javax.persistence.Entity;
-import javax.persistence.Id;
-import javax.persistence.JoinColumn;
-import javax.persistence.ManyToOne;
-import java.util.TimeZone;
-
-import static com.wbrawner.budgetserver.Utils.randomId;
-
-@Entity
-public class RecurringTransaction {
-    @Id
-    private final String id = randomId();
-    @ManyToOne
-    @JoinColumn(nullable = false)
-    private final User createdBy;
-    private String title;
-    private String description;
-    private Long amount;
-    @ManyToOne
-    private Category category;
-    private Boolean expense;
-    @ManyToOne
-    @JoinColumn(nullable = false)
-    private Budget budget;
-    private String timeZone;
-    private int time;
-    private FrequencyUnit frequencyUnit;
-    private int frequencyValue;
-
-    public RecurringTransaction() {
-        this(
-                null,
-                null,
-                FrequencyUnit.DAILY,
-                0,
-                null,
-                0,
-                null,
-                null,
-                null,
-                null,
-                null
-        );
-    }
-
-    public RecurringTransaction(
-            String title,
-            String description,
-            FrequencyUnit frequencyUnit,
-            int frequencyValue,
-            String timeZone,
-            int time,
-            Long amount,
-            Category category,
-            Boolean expense,
-            User createdBy,
-            Budget budget
-    ) {
-        this.title = title;
-        this.description = description;
-        this.frequencyUnit = frequencyUnit;
-        this.frequencyValue = frequencyValue;
-        setTimeZone(timeZone);
-        this.time = time;
-        this.amount = amount;
-        this.category = category;
-        this.expense = expense;
-        this.createdBy = createdBy;
-        this.budget = budget;
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public void setTitle(String title) {
-        this.title = title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public void setDescription(String description) {
-        this.description = description;
-    }
-
-    public FrequencyUnit getFrequencyUnit() {
-        return frequencyUnit;
-    }
-
-    public int getFrequencyValue() {
-        return frequencyValue;
-    }
-
-    public void setFrequency(FrequencyUnit frequencyUnit, int frequencyValue) {
-        if (frequencyValue < 0) throw new IllegalArgumentException("frequencyValue must be at least 0");
-        if (frequencyValue > frequencyUnit.maxValue) {
-            throw new IllegalArgumentException(String.format(
-                    "Invalid frequencyValue. Requested %d for %s but maxValue is %d",
-                    frequencyValue,
-                    frequencyUnit.name(),
-                    frequencyUnit.maxValue
-            ));
-        }
-        this.frequencyUnit = frequencyUnit;
-        this.frequencyValue = frequencyValue;
-    }
-
-    public String getTimeZone() {
-        return timeZone;
-    }
-
-    public void setTimeZone(String timeZone) {
-        this.timeZone = TimeZone.getTimeZone(timeZone).getID();
-    }
-
-    public int getTimeOfDayInSeconds() {
-        return time;
-    }
-
-    public void setTimeOfDayInSeconds(int time) {
-        this.time = time;
-    }
-
-    public Long getAmount() {
-        return amount;
-    }
-
-    public void setAmount(Long amount) {
-        this.amount = amount;
-    }
-
-    public Category getCategory() {
-        return category;
-    }
-
-    public void setCategory(Category category) {
-        this.category = category;
-    }
-
-    public Boolean isExpense() {
-        return expense;
-    }
-
-    public void setExpense(Boolean expense) {
-        this.expense = expense;
-    }
-
-    public User getCreatedBy() {
-        return createdBy;
-    }
-
-    public Budget getBudget() {
-        return budget;
-    }
-
-    public void setBudget(Budget budget) {
-        this.budget = budget;
-    }
-
-    enum FrequencyUnit {
-        DAILY(0),
-        WEEKLY(7),
-        MONTHLY(30),
-        YEARLY(365);
-
-        int maxValue;
-
-        FrequencyUnit(int maxValue) {
-            this.maxValue = maxValue;
-        }
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/recurrence/RecurringTransactionController.java

@@ -1,168 +0,0 @@
-package com.wbrawner.budgetserver.recurrence;
-
-import com.wbrawner.budgetserver.ErrorResponse;
-import com.wbrawner.budgetserver.category.Category;
-import com.wbrawner.budgetserver.category.CategoryRepository;
-import com.wbrawner.budgetserver.permission.Permission;
-import com.wbrawner.budgetserver.permission.UserPermission;
-import com.wbrawner.budgetserver.permission.UserPermissionRepository;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.http.HttpStatus;
-import org.springframework.http.MediaType;
-import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.*;
-
-import javax.transaction.Transactional;
-import java.util.Collections;
-import java.util.List;
-import java.util.stream.Collectors;
-
-import static com.wbrawner.budgetserver.Utils.getCurrentUser;
-
-@RestController
-@RequestMapping(path = "/recurrence")
-@Transactional
-public class RecurringTransactionController {
-    private final CategoryRepository categoryRepository;
-    private final RecurringTransactionRepository recurringTransactionRepository;
-    private final UserPermissionRepository userPermissionsRepository;
-
-    private final Logger logger = LoggerFactory.getLogger(RecurringTransactionController.class);
-
-    public RecurringTransactionController(
-            CategoryRepository categoryRepository,
-            RecurringTransactionRepository recurringTransactionRepository,
-            UserPermissionRepository userPermissionsRepository
-    ) {
-        this.categoryRepository = categoryRepository;
-        this.recurringTransactionRepository = recurringTransactionRepository;
-        this.userPermissionsRepository = userPermissionsRepository;
-    }
-
-    @GetMapping(path = "", produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<List<RecurringTransactionResponse>> getRecurringTransactions(
-            @RequestParam("budgetId") String budgetId
-    ) {
-        List<UserPermission> userPermissions = userPermissionsRepository.findAllByUserAndBudget_IdIn(
-                getCurrentUser(),
-                Collections.singletonList(budgetId),
-                null
-        );
-        if (userPermissions.isEmpty()) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-        var budget = userPermissions.get(0).getBudget();
-        var transactions = recurringTransactionRepository.findAllByBudget(budget)
-                .stream()
-                .map(RecurringTransactionResponse::new)
-                .collect(Collectors.toList());
-        return ResponseEntity.ok(transactions);
-    }
-
-    @GetMapping(path = "/{id}", produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<RecurringTransactionResponse> getRecurringTransaction(@PathVariable String id) {
-        var budgets = userPermissionsRepository.findAllByUser(getCurrentUser(), null)
-                .stream()
-                .map(UserPermission::getBudget)
-                .collect(Collectors.toList());
-        var transaction = recurringTransactionRepository.findByIdAndBudgetIn(id, budgets).orElse(null);
-        if (transaction == null) return ResponseEntity.notFound().build();
-        return ResponseEntity.ok(new RecurringTransactionResponse(transaction));
-    }
-
-    @PostMapping(path = "", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<Object> newTransaction(@RequestBody RecurringTransactionRequest request) {
-        var userResponse = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), request.getBudgetId())
-                .orElse(null);
-        if (userResponse == null) {
-            return ResponseEntity.badRequest().body(new ErrorResponse("Invalid budget ID"));
-        }
-        if (userResponse.getPermission().isNotAtLeast(Permission.WRITE)) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-        var budget = userResponse.getBudget();
-        Category category = null;
-        if (request.getCategoryId() != null) {
-            category = categoryRepository.findByBudgetAndId(budget, request.getCategoryId()).orElse(null);
-        }
-        return ResponseEntity.ok(new RecurringTransactionResponse(recurringTransactionRepository.save(new RecurringTransaction(
-                request.getTitle(),
-                request.getDescription(),
-                request.getFrequencyUnit(),
-                request.getFrequencyValue(),
-                request.getTimeZone(),
-                request.getTime(),
-                request.getAmount(),
-                category,
-                request.getExpense(),
-                getCurrentUser(),
-                budget
-        ))));
-    }
-
-    @PutMapping(path = "/{id}", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<Object> updateTransaction(@PathVariable String id, @RequestBody RecurringTransactionRequest request) {
-        var transaction = recurringTransactionRepository.findById(id).orElse(null);
-        if (transaction == null) return ResponseEntity.notFound().build();
-        var userPermission = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), transaction.getBudget().getId()).orElse(null);
-        if (userPermission == null) return ResponseEntity.notFound().build();
-        if (userPermission.getPermission().isNotAtLeast(Permission.WRITE)) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-        if (request.getTitle() != null) {
-            transaction.setTitle(request.getTitle());
-        }
-        if (request.getDescription() != null) {
-            transaction.setDescription(request.getDescription());
-        }
-        if (request.getTimeZone() != null) {
-            transaction.setTimeZone(request.getTimeZone());
-        }
-        if (request.getAmount() != null) {
-            transaction.setAmount(request.getAmount());
-        }
-        if (request.getExpense() != null) {
-            transaction.setExpense(request.getExpense());
-        }
-        if (request.getTime() != null) {
-            transaction.setTimeOfDayInSeconds(request.getTime());
-        }
-        if (request.getFrequencyUnit() != null && request.getFrequencyValue() != null) {
-            transaction.setFrequency(request.getFrequencyUnit(), request.getFrequencyValue());
-        }
-        if (request.getBudgetId() != null) {
-            var newUserPermission = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), request.getBudgetId()).orElse(null);
-            if (newUserPermission == null || newUserPermission.getPermission().isNotAtLeast(Permission.WRITE)) {
-                return ResponseEntity
-                        .badRequest()
-                        .body(new ErrorResponse("Invalid budget"));
-            }
-            transaction.setBudget(newUserPermission.getBudget());
-        }
-        if (request.getCategoryId() != null) {
-            var category = categoryRepository.findByBudgetAndId(transaction.getBudget(), request.getCategoryId()).orElse(null);
-            if (category == null) {
-                return ResponseEntity
-                        .badRequest()
-                        .body(new ErrorResponse("Invalid category"));
-            }
-            transaction.setCategory(category);
-        }
-        return ResponseEntity.ok(new RecurringTransactionResponse(recurringTransactionRepository.save(transaction)));
-    }
-
-    @DeleteMapping(path = "/{id}", produces = {MediaType.TEXT_PLAIN_VALUE})
-    public ResponseEntity<Void> deleteTransaction(@PathVariable String id) {
-        var transaction = recurringTransactionRepository.findById(id).orElse(null);
-        if (transaction == null) return ResponseEntity.notFound().build();
-        // Check that the transaction belongs to an budget that the user has access to before deleting it
-        var userPermission = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), transaction.getBudget().getId()).orElse(null);
-        if (userPermission == null) return ResponseEntity.notFound().build();
-        if (userPermission.getPermission().isNotAtLeast(Permission.WRITE)) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-        recurringTransactionRepository.delete(transaction);
-        return ResponseEntity.ok().build();
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/recurrence/RecurringTransactionRepository.java

@@ -1,13 +0,0 @@
-package com.wbrawner.budgetserver.recurrence;
-
-import com.wbrawner.budgetserver.budget.Budget;
-import org.springframework.data.repository.PagingAndSortingRepository;
-
-import java.util.List;
-import java.util.Optional;
-
-public interface RecurringTransactionRepository extends PagingAndSortingRepository<RecurringTransaction, String> {
-    Optional<RecurringTransaction> findByIdAndBudgetIn(String id, List<Budget> budgets);
-
-    List<RecurringTransaction> findAllByBudget(Budget budget);
-}

api/src/main/java/com/wbrawner/budgetserver/recurrence/RecurringTransactionRequest.java

@@ -1,83 +0,0 @@
-package com.wbrawner.budgetserver.recurrence;
-
-class RecurringTransactionRequest {
-    private final String title;
-    private final String description;
-    private final Long amount;
-    private final String categoryId;
-    private final Boolean expense;
-    private final String budgetId;
-    private final String timeZone;
-    private final Integer time;
-    private final RecurringTransaction.FrequencyUnit frequencyUnit;
-    private final Integer frequencyValue;
-
-
-    RecurringTransactionRequest() {
-        this(null, null, null, 0, null, 0, null, null, null, null);
-    }
-
-    RecurringTransactionRequest(
-            String title,
-            String description,
-            RecurringTransaction.FrequencyUnit frequencyUnit,
-            int frequencyValue,
-            String timeZone,
-            int time,
-            Long amount,
-            String categoryId,
-            Boolean expense,
-            String budgetId
-    ) {
-        this.title = title;
-        this.description = description;
-        this.frequencyUnit = frequencyUnit;
-        this.frequencyValue = frequencyValue;
-        this.timeZone = timeZone;
-        this.time = time;
-        this.amount = amount;
-        this.categoryId = categoryId;
-        this.expense = expense;
-        this.budgetId = budgetId;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public String getTimeZone() {
-        return timeZone;
-    }
-
-    public Integer getTime() {
-        return time;
-    }
-
-    public RecurringTransaction.FrequencyUnit getFrequencyUnit() {
-        return frequencyUnit;
-    }
-
-    public Integer getFrequencyValue() {
-        return frequencyValue;
-    }
-
-    public Long getAmount() {
-        return amount;
-    }
-
-    public String getCategoryId() {
-        return categoryId;
-    }
-
-    public Boolean getExpense() {
-        return expense;
-    }
-
-    public String getBudgetId() {
-        return budgetId;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/recurrence/RecurringTransactionResponse.java

@@ -1,62 +0,0 @@
-package com.wbrawner.budgetserver.recurrence;
-
-class RecurringTransactionResponse {
-    public final String id;
-    public final String title;
-    public final String description;
-    public final long amount;
-    public final boolean expense;
-    public final String budgetId;
-    public final String categoryId;
-    public final String createdBy;
-    public final String timeZone;
-    public final int time;
-    public final RecurringTransaction.FrequencyUnit frequencyUnit;
-    public final int frequencyValue;
-
-
-    RecurringTransactionResponse(
-            String id,
-            String title,
-            String description,
-            long amount,
-            boolean expense,
-            String budgetId,
-            String categoryId,
-            String createdBy,
-            String timeZone,
-            int time,
-            RecurringTransaction.FrequencyUnit frequencyUnit,
-            int frequencyValue
-    ) {
-        this.id = id;
-        this.title = title;
-        this.description = description;
-        this.amount = amount;
-        this.expense = expense;
-        this.budgetId = budgetId;
-        this.categoryId = categoryId;
-        this.createdBy = createdBy;
-        this.timeZone = timeZone;
-        this.time = time;
-        this.frequencyUnit = frequencyUnit;
-        this.frequencyValue = frequencyValue;
-    }
-
-    RecurringTransactionResponse(RecurringTransaction recurringTransaction) {
-        this(
-                recurringTransaction.getId(),
-                recurringTransaction.getTitle(),
-                recurringTransaction.getDescription(),
-                recurringTransaction.getAmount(),
-                recurringTransaction.isExpense(),
-                recurringTransaction.getBudget().getId(),
-                recurringTransaction.getCategory() != null ? recurringTransaction.getCategory().getId() : null,
-                recurringTransaction.getCreatedBy().getId(),
-                recurringTransaction.getTimeZone(),
-                recurringTransaction.getTimeOfDayInSeconds(),
-                recurringTransaction.getFrequencyUnit(),
-                recurringTransaction.getFrequencyValue()
-        );
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/recurrence/RecurringTransactionTask.java

@@ -1,84 +0,0 @@
-package com.wbrawner.budgetserver.recurrence;
-
-import com.wbrawner.budgetserver.transaction.Transaction;
-import com.wbrawner.budgetserver.transaction.TransactionRepository;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.scheduling.annotation.Scheduled;
-import org.springframework.stereotype.Component;
-
-import java.util.Calendar;
-import java.util.GregorianCalendar;
-import java.util.TimeZone;
-
-@Component
-public class RecurringTransactionTask {
-    private final RecurringTransactionRepository recurringTransactionRepository;
-    private final TransactionRepository transactionRepository;
-
-    @Autowired
-    public RecurringTransactionTask(
-            RecurringTransactionRepository recurringTransactionRepository,
-            TransactionRepository transactionRepository
-    ) {
-        this.recurringTransactionRepository = recurringTransactionRepository;
-        this.transactionRepository = transactionRepository;
-    }
-
-    @Scheduled(cron = "0 0 * * * *")
-    public void createTransactions() {
-        recurringTransactionRepository.findAll().forEach(recurringTransaction -> {
-            GregorianCalendar today = new GregorianCalendar(TimeZone.getTimeZone(recurringTransaction.getTimeZone()));
-            // if recurrence matches today, create a new transaction
-            int adjustedFrequencyValue, calendarField;
-            switch (recurringTransaction.getFrequencyUnit()) {
-                case DAILY -> {
-                    // Daily transactions should have the frequency value set to 0, so we just force it to be the same
-                    // as the current date in order to force the transaction creation.
-                    adjustedFrequencyValue = today.get(Calendar.DATE);
-                    calendarField = Calendar.DATE;
-                }
-                case WEEKLY -> {
-                    // No adjustments needed for day of week
-                    adjustedFrequencyValue = today.get(Calendar.DAY_OF_WEEK);
-                    calendarField = Calendar.DAY_OF_WEEK;
-                }
-                case MONTHLY -> {
-                    // Check if the day of the month is correct
-                    adjustedFrequencyValue = Math.min(recurringTransaction.getFrequencyValue(), today.getActualMaximum(Calendar.DAY_OF_MONTH));
-                    calendarField = Calendar.DAY_OF_MONTH;
-                }
-                case YEARLY -> {
-                    adjustedFrequencyValue = recurringTransaction.getFrequencyValue();
-                    if (today.isLeapYear(today.get(Calendar.YEAR)) && today.get(Calendar.DAY_OF_YEAR) >= 31 + 29) {
-                        // We're just pretending that Feb 29th doesn't exist here...
-                        adjustedFrequencyValue -= 1;
-                    }
-                    calendarField = Calendar.DAY_OF_YEAR;
-                }
-                default -> throw new IllegalStateException("Unexpected value: " + recurringTransaction.getFrequencyUnit());
-            }
-            if (adjustedFrequencyValue == today.get(calendarField)) {
-                createTransaction(recurringTransaction, today);
-            }
-        });
-    }
-
-    private void createTransaction(RecurringTransaction recurringTransaction, Calendar transactionCalendar) {
-        transactionCalendar.set(Calendar.HOUR, 0);
-        transactionCalendar.set(Calendar.MINUTE, 0);
-        transactionCalendar.set(Calendar.SECOND, 0);
-        transactionCalendar.set(Calendar.MILLISECOND, 0);
-        transactionCalendar.add(Calendar.SECOND, recurringTransaction.getTimeOfDayInSeconds());
-        transactionRepository.save(new Transaction(
-                recurringTransaction.getTitle(),
-                recurringTransaction.getDescription(),
-                transactionCalendar.toInstant(),
-                recurringTransaction.getAmount(),
-                recurringTransaction.getCategory(),
-                recurringTransaction.isExpense(),
-                recurringTransaction.getCreatedBy(),
-                recurringTransaction.getBudget(),
-                recurringTransaction
-        ));
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/session/Session.java

@@ -1,44 +0,0 @@
-package com.wbrawner.budgetserver.session;
-
-import javax.persistence.Entity;
-import javax.persistence.Id;
-import java.util.Date;
-
-import static com.wbrawner.budgetserver.Utils.*;
-
-@Entity
-public class Session {
-    @Id
-    private final String id = randomId();
-    private final String userId;
-    private final String token = randomString(255);
-    private Date expiration = twoWeeksFromNow();
-
-    public Session() {
-        this("");
-    }
-
-    public Session(String userId) {
-        this.userId = userId;
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public String getUserId() {
-        return userId;
-    }
-
-    public String getToken() {
-        return token;
-    }
-
-    public Date getExpiration() {
-        return expiration;
-    }
-
-    public void setExpiration(Date expiration) {
-        this.expiration = expiration;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/session/SessionCleanupTask.java

@@ -1,22 +0,0 @@
-package com.wbrawner.budgetserver.session;
-
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.scheduling.annotation.Scheduled;
-import org.springframework.stereotype.Component;
-
-import java.util.Date;
-
-@Component
-public class SessionCleanupTask {
-    private final UserSessionRepository sessionRepository;
-
-    @Autowired
-    public SessionCleanupTask(UserSessionRepository sessionRepository) {
-        this.sessionRepository = sessionRepository;
-    }
-
-    @Scheduled(cron = "0 0 * * * *")
-    public void cleanup() {
-        sessionRepository.deleteAllByExpirationBefore(new Date());
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/session/SessionResponse.java

@@ -1,25 +0,0 @@
-package com.wbrawner.budgetserver.session;
-
-import java.util.Date;
-
-public class SessionResponse {
-    private final String token;
-    private final String expiration;
-
-    public SessionResponse(Session session) {
-        this(session.getToken(), session.getExpiration());
-    }
-
-    public SessionResponse(String token, Date expiration) {
-        this.token = token;
-        this.expiration = expiration.toInstant().toString();
-    }
-
-    public String getToken() {
-        return token;
-    }
-
-    public String getExpiration() {
-        return expiration;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/session/UserSessionRepository.java

@@ -1,17 +0,0 @@
-package com.wbrawner.budgetserver.session;
-
-import org.springframework.data.repository.PagingAndSortingRepository;
-
-import java.util.Date;
-import java.util.List;
-import java.util.Optional;
-
-public interface UserSessionRepository extends PagingAndSortingRepository<Session, String> {
-    List<Session> findByUserId(String userId);
-
-    Optional<Session> findByToken(String token);
-
-    Optional<Session> findByUserIdAndToken(String userId, String token);
-
-    void deleteAllByExpirationBefore(Date expiration);
-}

api/src/main/java/com/wbrawner/budgetserver/transaction/NewTransactionRequest.java

@@ -1,53 +0,0 @@
-package com.wbrawner.budgetserver.transaction;
-
-class NewTransactionRequest {
-    private final String title;
-    private final String description;
-    private final String date;
-    private final Long amount;
-    private final String categoryId;
-    private final Boolean expense;
-    private final String budgetId;
-
-    NewTransactionRequest() {
-        this(null, null, null, null, null, null, null);
-    }
-
-    NewTransactionRequest(String title, String description, String date, Long amount, String categoryId, Boolean expense, String budgetId) {
-        this.title = title;
-        this.description = description;
-        this.date = date;
-        this.amount = amount;
-        this.categoryId = categoryId;
-        this.expense = expense;
-        this.budgetId = budgetId;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public String getDate() {
-        return date;
-    }
-
-    public Long getAmount() {
-        return amount;
-    }
-
-    public String getCategoryId() {
-        return categoryId;
-    }
-
-    public Boolean getExpense() {
-        return expense;
-    }
-
-    public String getBudgetId() {
-        return budgetId;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/transaction/Transaction.java

@@ -1,138 +0,0 @@
-package com.wbrawner.budgetserver.transaction;
-
-import com.wbrawner.budgetserver.budget.Budget;
-import com.wbrawner.budgetserver.category.Category;
-import com.wbrawner.budgetserver.recurrence.RecurringTransaction;
-import com.wbrawner.budgetserver.user.User;
-
-import javax.persistence.Entity;
-import javax.persistence.Id;
-import javax.persistence.JoinColumn;
-import javax.persistence.ManyToOne;
-import java.time.Instant;
-
-import static com.wbrawner.budgetserver.Utils.randomId;
-
-@Entity
-public class Transaction implements Comparable<Transaction> {
-    @Id
-    private final String id = randomId();
-    @ManyToOne
-    @JoinColumn(nullable = false)
-    private final User createdBy;
-    private String title;
-    private String description;
-    private Instant date;
-    private Long amount;
-    @ManyToOne
-    private Category category;
-    private Boolean expense;
-    @ManyToOne
-    @JoinColumn(nullable = false)
-    private Budget budget;
-    @ManyToOne
-    private RecurringTransaction recurrence;
-
-    public Transaction() {
-        this(null, null, null, null, null, null, null, null, null);
-    }
-
-    public Transaction(
-            String title,
-            String description,
-            Instant date,
-            Long amount,
-            Category category,
-            Boolean expense,
-            User createdBy,
-            Budget budget,
-            RecurringTransaction recurrence
-    ) {
-        this.title = title;
-        this.description = description;
-        this.date = date;
-        this.amount = amount;
-        this.category = category;
-        this.expense = expense;
-        this.createdBy = createdBy;
-        this.budget = budget;
-        this.recurrence = recurrence;
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public void setTitle(String title) {
-        this.title = title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public void setDescription(String description) {
-        this.description = description;
-    }
-
-    public Instant getDate() {
-        return date;
-    }
-
-    public void setDate(Instant date) {
-        this.date = date;
-    }
-
-    public Long getAmount() {
-        return amount;
-    }
-
-    public void setAmount(Long amount) {
-        this.amount = amount;
-    }
-
-    public Category getCategory() {
-        return category;
-    }
-
-    public void setCategory(Category category) {
-        this.category = category;
-    }
-
-    public Boolean getExpense() {
-        return expense;
-    }
-
-    public void setExpense(Boolean expense) {
-        this.expense = expense;
-    }
-
-    public User getCreatedBy() {
-        return createdBy;
-    }
-
-    public Budget getBudget() {
-        return budget;
-    }
-
-    public void setBudget(Budget budget) {
-        this.budget = budget;
-    }
-
-    public RecurringTransaction getRecurrence() {
-        return this.recurrence;
-    }
-
-    public void setRecurrence(RecurringTransaction recurrence) {
-        this.recurrence = recurrence;
-    }
-
-    @Override
-    public int compareTo(Transaction other) {
-        return this.date.compareTo(other.date);
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/transaction/TransactionController.java

@@ -1,210 +0,0 @@
-package com.wbrawner.budgetserver.transaction;
-
-import com.wbrawner.budgetserver.ErrorResponse;
-import com.wbrawner.budgetserver.category.Category;
-import com.wbrawner.budgetserver.category.CategoryRepository;
-import com.wbrawner.budgetserver.permission.Permission;
-import com.wbrawner.budgetserver.permission.UserPermission;
-import com.wbrawner.budgetserver.permission.UserPermissionRepository;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.springframework.data.domain.PageRequest;
-import org.springframework.data.domain.Sort;
-import org.springframework.http.HttpStatus;
-import org.springframework.http.MediaType;
-import org.springframework.http.ResponseEntity;
-import org.springframework.web.bind.annotation.*;
-
-import javax.transaction.Transactional;
-import java.time.Instant;
-import java.util.List;
-import java.util.stream.Collectors;
-
-import static com.wbrawner.budgetserver.Utils.*;
-
-@RestController
-@RequestMapping(path = "/transactions")
-@Transactional
-public class TransactionController {
-    private final CategoryRepository categoryRepository;
-    private final TransactionRepository transactionRepository;
-    private final UserPermissionRepository userPermissionsRepository;
-
-    private final Logger logger = LoggerFactory.getLogger(TransactionController.class);
-
-    public TransactionController(CategoryRepository categoryRepository,
-                                 TransactionRepository transactionRepository,
-                                 UserPermissionRepository userPermissionsRepository) {
-        this.categoryRepository = categoryRepository;
-        this.transactionRepository = transactionRepository;
-        this.userPermissionsRepository = userPermissionsRepository;
-    }
-
-    @GetMapping(path = "", produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<List<TransactionResponse>> getTransactions(
-            @RequestParam(value = "categoryIds", required = false) List<String> categoryIds,
-            @RequestParam(value = "budgetIds", required = false) List<String> budgetIds,
-            @RequestParam(value = "from", required = false) String from,
-            @RequestParam(value = "to", required = false) String to,
-            @RequestParam(value = "count", required = false) Integer count,
-            @RequestParam(value = "page", required = false) Integer page,
-            @RequestParam(value = "sortBy", required = false) String sortBy,
-            @RequestParam(value = "sortOrder", required = false) Sort.Direction sortOrder
-    ) {
-        List<UserPermission> userPermissions;
-        if (budgetIds != null && !budgetIds.isEmpty()) {
-            userPermissions = userPermissionsRepository.findAllByUserAndBudget_IdIn(
-                    getCurrentUser(),
-                    budgetIds,
-                    PageRequest.of(page != null ? page : 0, count != null ? count : 1000)
-            );
-        } else {
-            userPermissions = userPermissionsRepository.findAllByUser(getCurrentUser(), null);
-        }
-        var budgets = userPermissions.stream()
-                .map(UserPermission::getBudget)
-                .collect(Collectors.toList());
-
-        List<Category> categories = null;
-        if (categoryIds != null && !categoryIds.isEmpty()) {
-            categories = categoryRepository.findAllByBudgetInAndIdIn(budgets, categoryIds, null);
-        }
-        var pageRequest = PageRequest.of(
-                Math.min(0, page != null ? page - 1 : 0),
-                count != null ? count : 1000,
-                sortOrder != null ? sortOrder : Sort.Direction.DESC,
-                sortBy != null ? sortBy : "date"
-        );
-        Instant fromInstant;
-        try {
-            fromInstant = Instant.parse(from);
-        } catch (Exception e) {
-            if (!(e instanceof NullPointerException))
-                logger.error("Failed to parse '" + from + "' to Instant for 'from' parameter", e);
-            fromInstant = getFirstOfMonth().toInstant();
-        }
-        Instant toInstant;
-        try {
-            toInstant = Instant.parse(to);
-        } catch (Exception e) {
-            if (!(e instanceof NullPointerException))
-                logger.error("Failed to parse '" + to + "' to Instant for 'to' parameter", e);
-            toInstant = getEndOfMonth().toInstant();
-        }
-        var query = categories == null ? transactionRepository.findAllByBudgetInAndDateGreaterThanAndDateLessThan(
-                budgets,
-                fromInstant,
-                toInstant,
-                pageRequest
-        ) : transactionRepository.findAllByBudgetInAndCategoryInAndDateGreaterThanAndDateLessThan(
-                budgets,
-                categories,
-                fromInstant,
-                toInstant,
-                pageRequest
-        );
-        var transactions = query
-                .stream()
-                .map(TransactionResponse::new)
-                .collect(Collectors.toList());
-        return ResponseEntity.ok(transactions);
-    }
-
-    @GetMapping(path = "/{id}", produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<TransactionResponse> getTransaction(@PathVariable String id) {
-        var budgets = userPermissionsRepository.findAllByUser(getCurrentUser(), null)
-                .stream()
-                .map(UserPermission::getBudget)
-                .collect(Collectors.toList());
-        var transaction = transactionRepository.findByIdAndBudgetIn(id, budgets).orElse(null);
-        if (transaction == null) return ResponseEntity.notFound().build();
-        return ResponseEntity.ok(new TransactionResponse(transaction));
-    }
-
-    @PostMapping(path = "", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<Object> newTransaction(@RequestBody NewTransactionRequest request) {
-        var userResponse = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), request.getBudgetId())
-                .orElse(null);
-        if (userResponse == null) {
-            return ResponseEntity.badRequest().body(new ErrorResponse("Invalid budget ID"));
-        }
-        if (userResponse.getPermission().isNotAtLeast(Permission.WRITE)) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-        var budget = userResponse.getBudget();
-        Category category = null;
-        if (request.getCategoryId() != null) {
-            category = categoryRepository.findByBudgetAndId(budget, request.getCategoryId()).orElse(null);
-        }
-        return ResponseEntity.ok(new TransactionResponse(transactionRepository.save(new Transaction(
-                request.getTitle(),
-                request.getDescription(),
-                Instant.parse(request.getDate()),
-                request.getAmount(),
-                category,
-                request.getExpense(),
-                getCurrentUser(),
-                budget,
-                null
-        ))));
-    }
-
-    @PutMapping(path = "/{id}", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
-    public ResponseEntity<Object> updateTransaction(@PathVariable String id, @RequestBody UpdateTransactionRequest request) {
-        var transaction = transactionRepository.findById(id).orElse(null);
-        if (transaction == null) return ResponseEntity.notFound().build();
-        var userPermission = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), transaction.getBudget().getId()).orElse(null);
-        if (userPermission == null) return ResponseEntity.notFound().build();
-        if (userPermission.getPermission().isNotAtLeast(Permission.WRITE)) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-        if (request.getTitle() != null) {
-            transaction.setTitle(request.getTitle());
-        }
-        if (request.getDescription() != null) {
-            transaction.setDescription(request.getDescription());
-        }
-        if (request.getDate() != null) {
-            transaction.setDate(Instant.parse(request.getDate()));
-        }
-        if (request.getAmount() != null) {
-            transaction.setAmount(request.getAmount());
-        }
-        if (request.getExpense() != null) {
-            transaction.setExpense(request.getExpense());
-        }
-        if (request.getBudgetId() != null) {
-            var newUserPermission = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), request.getBudgetId()).orElse(null);
-            if (newUserPermission == null || newUserPermission.getPermission().isNotAtLeast(Permission.WRITE)) {
-                return ResponseEntity
-                        .badRequest()
-                        .body(new ErrorResponse("Invalid budget"));
-            }
-            transaction.setBudget(newUserPermission.getBudget());
-        }
-        if (request.getCategoryId() != null) {
-            var category = categoryRepository.findByBudgetAndId(transaction.getBudget(), request.getCategoryId()).orElse(null);
-            if (category == null) {
-                return ResponseEntity
-                        .badRequest()
-                        .body(new ErrorResponse("Invalid category"));
-            }
-            transaction.setCategory(category);
-        }
-        return ResponseEntity.ok(new TransactionResponse(transactionRepository.save(transaction)));
-    }
-
-    @DeleteMapping(path = "/{id}", produces = {MediaType.TEXT_PLAIN_VALUE})
-    public ResponseEntity<Void> deleteTransaction(@PathVariable String id) {
-        var transaction = transactionRepository.findById(id).orElse(null);
-        if (transaction == null) return ResponseEntity.notFound().build();
-        // Check that the transaction belongs to an budget that the user has access to before deleting it
-        var userPermission = userPermissionsRepository.findByUserAndBudget_Id(getCurrentUser(), transaction.getBudget().getId()).orElse(null);
-        if (userPermission == null) return ResponseEntity.notFound().build();
-        if (userPermission.getPermission().isNotAtLeast(Permission.WRITE)) {
-            return ResponseEntity.status(HttpStatus.FORBIDDEN).build();
-        }
-        transactionRepository.delete(transaction);
-        return ResponseEntity.ok().build();
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/transaction/TransactionRepository.java

@@ -1,45 +0,0 @@
-package com.wbrawner.budgetserver.transaction;
-
-import com.wbrawner.budgetserver.budget.Budget;
-import com.wbrawner.budgetserver.category.Category;
-import org.springframework.data.domain.Pageable;
-import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.PagingAndSortingRepository;
-
-import java.time.Instant;
-import java.util.Date;
-import java.util.List;
-import java.util.Optional;
-
-public interface TransactionRepository extends PagingAndSortingRepository<Transaction, String> {
-    Optional<Transaction> findByIdAndBudgetIn(String id, List<Budget> budgets);
-
-    List<Transaction> findAllByBudgetInAndCategoryInAndDateGreaterThanAndDateLessThan(
-            List<Budget> budgets,
-            List<Category> categories,
-            Instant start,
-            Instant end,
-            Pageable pageable
-    );
-
-    List<Transaction> findAllByBudgetInAndDateGreaterThanAndDateLessThan(
-            List<Budget> budgets,
-            Instant start,
-            Instant end,
-            Pageable pageable
-    );
-
-    List<Transaction> findAllByBudgetAndCategory(Budget budget, Category category);
-
-    @Query(
-            nativeQuery = true,
-            value = "SELECT (COALESCE((SELECT SUM(amount) from transaction WHERE Budget_id = :BudgetId AND expense = 0 AND date >= :from AND date <= :to), 0)) - (COALESCE((SELECT SUM(amount) from transaction WHERE Budget_id = :BudgetId AND expense = 1 AND date >= :from AND date <= :to), 0));"
-    )
-    Long sumBalanceByBudgetId(String BudgetId, Instant from, Instant to);
-
-    @Query(
-            nativeQuery = true,
-            value = "SELECT (COALESCE((SELECT SUM(amount) from transaction WHERE category_id = :categoryId AND expense = 0 AND date > :start), 0)) - (COALESCE((SELECT SUM(amount) from transaction WHERE category_id = :categoryId AND expense = 1 AND date > :start), 0));"
-    )
-    Long sumBalanceByCategoryId(String categoryId, Date start);
-}

api/src/main/java/com/wbrawner/budgetserver/transaction/TransactionResponse.java

@@ -1,83 +0,0 @@
-package com.wbrawner.budgetserver.transaction;
-
-class TransactionResponse {
-    private final String id;
-    private final String title;
-    private final String description;
-    private final String date;
-    private final Long amount;
-    private final Boolean expense;
-    private final String budgetId;
-    private final String categoryId;
-    private final String createdBy;
-
-    TransactionResponse(String id,
-                        String title,
-                        String description,
-                        String date,
-                        Long amount,
-                        Boolean expense,
-                        String budgetId,
-                        String categoryId,
-                        String createdBy) {
-        this.id = id;
-        this.title = title;
-        this.description = description;
-        this.date = date;
-        this.amount = amount;
-        this.expense = expense;
-        this.budgetId = budgetId;
-        this.categoryId = categoryId;
-        this.createdBy = createdBy;
-    }
-
-    TransactionResponse(Transaction transaction) {
-        this(
-                transaction.getId(),
-                transaction.getTitle(),
-                transaction.getDescription(),
-                transaction.getDate().toString(),
-                transaction.getAmount(),
-                transaction.getExpense(),
-                transaction.getBudget().getId(),
-                transaction.getCategory() != null ? transaction.getCategory().getId() : null,
-                transaction.getCreatedBy().getId()
-        );
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public String getDate() {
-        return date;
-    }
-
-    public Long getAmount() {
-        return amount;
-    }
-
-    public Boolean getExpense() {
-        return expense;
-    }
-
-    public String getBudgetId() {
-        return budgetId;
-    }
-
-    public String getCategoryId() {
-        return categoryId;
-    }
-
-    public String getCreatedBy() {
-        return createdBy;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/transaction/UpdateTransactionRequest.java

@@ -1,59 +0,0 @@
-package com.wbrawner.budgetserver.transaction;
-
-class UpdateTransactionRequest {
-    private final String title;
-    private final String description;
-    private final String date;
-    private final Long amount;
-    private final String categoryId;
-    private final Boolean expense;
-    private final String budgetId;
-    private final String createdBy;
-
-    UpdateTransactionRequest() {
-        this(null, null, null, null, null, null, null, null);
-    }
-
-    UpdateTransactionRequest(String title, String description, String date, Long amount, String categoryId, Boolean expense, String budgetId, String createdBy) {
-        this.title = title;
-        this.description = description;
-        this.date = date;
-        this.amount = amount;
-        this.categoryId = categoryId;
-        this.expense = expense;
-        this.budgetId = budgetId;
-        this.createdBy = createdBy;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public String getDate() {
-        return date;
-    }
-
-    public Long getAmount() {
-        return amount;
-    }
-
-    public String getCategoryId() {
-        return categoryId;
-    }
-
-    public Boolean getExpense() {
-        return expense;
-    }
-
-    public String getBudgetId() {
-        return budgetId;
-    }
-
-    public String getCreatedBy() {
-        return createdBy;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/user/LoginRequest.java

@@ -1,23 +0,0 @@
-package com.wbrawner.budgetserver.user;
-
-public class LoginRequest {
-    private final String username;
-    private final String password;
-
-    public LoginRequest() {
-        this(null, null);
-    }
-
-    public LoginRequest(String username, String password) {
-        this.username = username;
-        this.password = password;
-    }
-
-    public String getUsername() {
-        return username;
-    }
-
-    public String getPassword() {
-        return password;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/user/NewUserRequest.java

@@ -1,29 +0,0 @@
-package com.wbrawner.budgetserver.user;
-
-public class NewUserRequest {
-    private final String username;
-    private final String password;
-    private final String email;
-
-    public NewUserRequest() {
-        this(null, null, null);
-    }
-
-    public NewUserRequest(String username, String password, String email) {
-        this.username = username;
-        this.password = password;
-        this.email = email;
-    }
-
-    public String getUsername() {
-        return username;
-    }
-
-    public String getPassword() {
-        return password;
-    }
-
-    public String getEmail() {
-        return email;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/user/UpdateUserRequest.java

@@ -1,29 +0,0 @@
-package com.wbrawner.budgetserver.user;
-
-public class UpdateUserRequest {
-    private final String username;
-    private final String password;
-    private final String email;
-
-    public UpdateUserRequest() {
-        this(null, null, null);
-    }
-
-    public UpdateUserRequest(String username, String password, String email) {
-        this.username = username;
-        this.password = password;
-        this.email = email;
-    }
-
-    public String getUsername() {
-        return username;
-    }
-
-    public String getPassword() {
-        return password;
-    }
-
-    public String getEmail() {
-        return email;
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/user/User.java

@@ -1,96 +0,0 @@
-package com.wbrawner.budgetserver.user;
-
-import org.springframework.lang.NonNull;
-import org.springframework.security.core.GrantedAuthority;
-import org.springframework.security.core.authority.SimpleGrantedAuthority;
-import org.springframework.security.core.userdetails.UserDetails;
-
-import javax.persistence.Entity;
-import javax.persistence.Id;
-import javax.persistence.Transient;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
-
-import static com.wbrawner.budgetserver.Utils.randomId;
-
-@Entity
-public class User implements UserDetails {
-    @Id
-    private final String id = randomId();
-    @Transient
-    private final List<GrantedAuthority> authorities = Collections.singletonList(new SimpleGrantedAuthority("USER"));
-    private String username;
-    private String password;
-    private String email;
-
-    public User() {
-        this(null, null, null);
-    }
-
-    public User(String username, String password, String email) {
-        this.username = username;
-        this.password = password;
-        this.email = email;
-    }
-
-    @NonNull
-    public String getId() {
-        // This shouldn't ever need to be set manually, only through Hibernate
-        //noinspection ConstantConditions
-        return id;
-    }
-
-    @Override
-    public String getUsername() {
-        return username;
-    }
-
-    public void setUsername(String username) {
-        this.username = username;
-    }
-
-    @Override
-    public String getPassword() {
-        return password;
-    }
-
-    public void setPassword(String password) {
-        this.password = password;
-    }
-
-    public String getEmail() {
-        return email;
-    }
-
-    public void setEmail(String email) {
-        this.email = email;
-    }
-
-    @Override
-    public boolean isAccountNonExpired() {
-        return true;
-    }
-
-    @Override
-    public boolean isAccountNonLocked() {
-        return true;
-    }
-
-    @Override
-    public boolean isCredentialsNonExpired() {
-        return true;
-    }
-
-    @Override
-    public boolean isEnabled() {
-        return true;
-    }
-
-    @Override
-    public Collection<? extends GrantedAuthority> getAuthorities() {
-        return authorities;
-    }
-}
-
-

api/src/main/java/com/wbrawner/budgetserver/user/UserController.java

@@ -1,157 +0,0 @@
-package com.wbrawner.budgetserver.user;
-
-import com.wbrawner.budgetserver.ErrorResponse;
-import com.wbrawner.budgetserver.budget.BudgetRepository;
-import com.wbrawner.budgetserver.permission.UserPermissionRepository;
-import com.wbrawner.budgetserver.permission.UserPermissionResponse;
-import com.wbrawner.budgetserver.session.Session;
-import com.wbrawner.budgetserver.session.SessionResponse;
-import com.wbrawner.budgetserver.session.UserSessionRepository;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.http.MediaType;
-import org.springframework.http.ResponseEntity;
-import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
-import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
-import org.springframework.security.core.Authentication;
-import org.springframework.security.core.AuthenticationException;
-import org.springframework.security.core.context.SecurityContextHolder;
-import org.springframework.security.crypto.password.PasswordEncoder;
-import org.springframework.web.bind.annotation.*;
-
-import javax.transaction.Transactional;
-import java.util.List;
-import java.util.Objects;
-import java.util.stream.Collectors;
-
-import static com.wbrawner.budgetserver.Utils.getCurrentUser;
-
-@RestController
-@RequestMapping("/users")
-@Transactional
-public class UserController {
-    private final BudgetRepository budgetRepository;
-    private final UserRepository userRepository;
-    private final PasswordEncoder passwordEncoder;
-    private final UserPermissionRepository userPermissionsRepository;
-    private final UserSessionRepository userSessionRepository;
-    private final DaoAuthenticationProvider authenticationProvider;
-
-    @Autowired
-    public UserController(BudgetRepository budgetRepository,
-                          UserRepository userRepository,
-                          UserSessionRepository userSessionRepository,
-                          PasswordEncoder passwordEncoder,
-                          UserPermissionRepository userPermissionsRepository,
-                          DaoAuthenticationProvider authenticationProvider) {
-        this.budgetRepository = budgetRepository;
-        this.userRepository = userRepository;
-        this.userSessionRepository = userSessionRepository;
-        this.passwordEncoder = passwordEncoder;
-        this.userPermissionsRepository = userPermissionsRepository;
-        this.authenticationProvider = authenticationProvider;
-    }
-
-
-    @GetMapping(path = "", produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<List<UserPermissionResponse>> getUsers(String budgetId) {
-        var budget = budgetRepository.findById(budgetId).orElse(null);
-        if (budget == null) {
-            return ResponseEntity.notFound().build();
-        }
-        var userPermissions = userPermissionsRepository.findAllByBudget(budget, null);
-
-        var userInBudget = userPermissions.stream()
-                .anyMatch(userPermission ->
-                        userPermission.getUser().getId().equals(getCurrentUser().getId()));
-        if (!userInBudget) {
-            return ResponseEntity.notFound().build();
-        }
-        return ResponseEntity.ok(userPermissions.stream().map(UserPermissionResponse::new).collect(Collectors.toList()));
-    }
-
-    @PostMapping(path = "/login", produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<SessionResponse> login(@RequestBody LoginRequest request) {
-        var authReq = new UsernamePasswordAuthenticationToken(request.getUsername(), request.getPassword());
-        Authentication auth;
-        try {
-            auth = authenticationProvider.authenticate(authReq);
-        } catch (AuthenticationException e) {
-            return ResponseEntity.notFound().build();
-        }
-        SecurityContextHolder.getContext().setAuthentication(auth);
-        var user = Objects.requireNonNull(getCurrentUser());
-        var session = userSessionRepository.save(new Session(user.getId()));
-        return ResponseEntity.ok(new SessionResponse(session));
-    }
-
-    @GetMapping(path = "/me", produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<UserResponse> getProfile() {
-        var user = getCurrentUser();
-        if (user == null) return ResponseEntity.status(401).build();
-        return ResponseEntity.ok(new UserResponse(user));
-    }
-
-    @GetMapping(path = "/search", produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<List<UserResponse>> searchUsers(String query) {
-        return ResponseEntity.ok(
-                userRepository.findByUsernameContains(query)
-                        .stream()
-                        .map(UserResponse::new)
-                        .collect(Collectors.toList())
-        );
-    }
-
-    @GetMapping(path = "/{id}")
-    ResponseEntity<UserResponse> getUser(@PathVariable String id) {
-        var user = userRepository.findById(id).orElse(null);
-        if (user == null) {
-            return ResponseEntity.notFound().build();
-        }
-        return ResponseEntity.ok(new UserResponse(user));
-    }
-
-    @PostMapping(path = "", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<Object> newUser(@RequestBody NewUserRequest request) {
-        if (userRepository.findByUsername(request.getUsername()).isPresent())
-            return ResponseEntity.badRequest().body(new ErrorResponse("Username taken"));
-        if (userRepository.findByEmail(request.getEmail()).isPresent())
-            return ResponseEntity.badRequest().body(new ErrorResponse("Email taken"));
-        if (request.getPassword().isBlank())
-            return ResponseEntity.badRequest().body(new ErrorResponse("Invalid password"));
-        return ResponseEntity.ok(new UserResponse(userRepository.save(new User(
-                request.getUsername(),
-                passwordEncoder.encode(request.getPassword()),
-                request.getEmail()
-        ))));
-    }
-
-    @PutMapping(path = "/{id}", consumes = {MediaType.APPLICATION_JSON_VALUE}, produces = {MediaType.APPLICATION_JSON_VALUE})
-    ResponseEntity<Object> updateUser(@PathVariable Long id, @RequestBody UpdateUserRequest request) {
-        if (!getCurrentUser().getId().equals(id)) return ResponseEntity.status(403).build();
-        var user = userRepository.findById(getCurrentUser().getId()).orElse(null);
-        if (user == null) return ResponseEntity.notFound().build();
-        if (request.getUsername() != null) {
-            if (userRepository.findByUsername(request.getUsername()).isPresent())
-                return ResponseEntity.badRequest().body(new ErrorResponse("Username taken"));
-            user.setUsername(request.getUsername());
-        }
-        if (request.getEmail() != null) {
-            if (userRepository.findByEmail(request.getEmail()).isPresent())
-                return ResponseEntity.badRequest().body(new ErrorResponse("Email taken"));
-            user.setEmail(request.getEmail());
-        }
-        if (request.getPassword() != null) {
-            if (request.getPassword().isBlank())
-                return ResponseEntity.badRequest().body(new ErrorResponse("Invalid password"));
-            user.setPassword(passwordEncoder.encode(request.getPassword()));
-        }
-        return ResponseEntity.ok(new UserResponse(userRepository.save(user)));
-    }
-
-    @DeleteMapping(path = "/{id}", produces = {MediaType.TEXT_PLAIN_VALUE})
-    ResponseEntity<Void> deleteUser(@PathVariable String id) {
-        if (!getCurrentUser().getId().equals(id)) return ResponseEntity.status(403).build();
-        userRepository.deleteById(id);
-        return ResponseEntity.ok().build();
-    }
-}

api/src/main/java/com/wbrawner/budgetserver/user/UserRepository.java

@@ -1,16 +0,0 @@
-package com.wbrawner.budgetserver.user;
-
-import org.springframework.data.repository.PagingAndSortingRepository;
-
-import java.util.List;
-import java.util.Optional;
-
-public interface UserRepository extends PagingAndSortingRepository<User, String> {
-    Optional<User> findByUsername(String username);
-
-    Optional<User> findByUsernameAndPassword(String username, String password);
-
-    List<User> findByUsernameContains(String username);
-
-    Optional<User> findByEmail(String email);
-}

api/src/main/java/com/wbrawner/budgetserver/user/UserResponse.java

@@ -1,29 +0,0 @@
-package com.wbrawner.budgetserver.user;
-
-public class UserResponse {
-    private final String id;
-    private final String username;
-    private final String email;
-
-    public UserResponse(User user) {
-        this(user.getId(), user.getUsername(), user.getEmail());
-    }
-
-    public UserResponse(String id, String username, String email) {
-        this.id = id;
-        this.username = username;
-        this.email = email;
-    }
-
-    public String getId() {
-        return id;
-    }
-
-    public String getUsername() {
-        return username;
-    }
-
-    public String getEmail() {
-        return email;
-    }
-}

api/src/main/kotlin/com/wbrawner/twigs/BudgetRoutes.kt

@@ -0,0 +1,60 @@
+package com.wbrawner.twigs
+
+import com.wbrawner.twigs.service.budget.BudgetService
+import com.wbrawner.twigs.service.requireSession
+import com.wbrawner.twigs.service.respondCatching
+import io.ktor.http.*
+import io.ktor.server.application.*
+import io.ktor.server.auth.*
+import io.ktor.server.request.*
+import io.ktor.server.routing.*
+import io.ktor.server.util.*
+
+fun Application.budgetRoutes(budgetService: BudgetService) {
+    routing {
+        route("/api/budgets") {
+            authenticate(optional = false) {
+                get {
+                    call.respondCatching {
+                        budgetService.budgetsForUser(userId = requireSession().userId)
+                    }
+                }
+
+                get("/{id}") {
+                    call.respondCatching {
+                        budgetService.budget(
+                            budgetId = call.parameters.getOrFail("id"),
+                            userId = requireSession().userId
+                        )
+                    }
+                }
+
+                post {
+                    call.respondCatching {
+                        budgetService.save(request = call.receive(), userId = requireSession().userId)
+                    }
+                }
+
+                put("/{id}") {
+                    call.respondCatching {
+                        budgetService.save(
+                            request = call.receive(),
+                            userId = requireSession().userId,
+                            budgetId = call.parameters.getOrFail("id")
+                        )
+                    }
+                }
+
+                delete("/{id}") {
+                    call.respondCatching {
+                        budgetService.delete(
+                            budgetId = call.parameters.getOrFail("id"),
+                            userId = requireSession().userId
+                        )
+                        HttpStatusCode.NoContent
+                    }
+                }
+            }
+        }
+    }
+}

api/src/main/kotlin/com/wbrawner/twigs/CategoryRoutes.kt

@@ -0,0 +1,66 @@
+package com.wbrawner.twigs
+
+import com.wbrawner.twigs.service.category.CategoryRequest
+import com.wbrawner.twigs.service.category.CategoryService
+import com.wbrawner.twigs.service.requireSession
+import com.wbrawner.twigs.service.respondCatching
+import io.ktor.http.*
+import io.ktor.server.application.*
+import io.ktor.server.auth.*
+import io.ktor.server.request.*
+import io.ktor.server.routing.*
+import io.ktor.server.util.*
+
+fun Application.categoryRoutes(categoryService: CategoryService) {
+    routing {
+        route("/api/categories") {
+            authenticate(optional = false) {
+                get {
+                    call.respondCatching {
+                        categoryService.categories(
+                            budgetIds = call.request.queryParameters.getAll("budgetIds").orEmpty(),
+                            userId = requireSession().userId,
+                            expense = call.request.queryParameters["expense"]?.toBoolean(),
+                            archived = call.request.queryParameters["archived"]?.toBoolean()
+                        )
+                    }
+                }
+
+                get("/{id}") {
+                    call.respondCatching {
+                        categoryService.category(
+                            categoryId = call.parameters.getOrFail("id"),
+                            userId = requireSession().userId
+                        )
+                    }
+                }
+
+                post {
+                    call.respondCatching {
+                        categoryService.save(call.receive<CategoryRequest>(), requireSession().userId)
+                    }
+                }
+
+                put("/{id}") {
+                    call.respondCatching {
+                        categoryService.save(
+                            request = call.receive<CategoryRequest>(),
+                            userId = requireSession().userId,
+                            categoryId = call.parameters.getOrFail("id")
+                        )
+                    }
+                }
+
+                delete("/{id}") {
+                    call.respondCatching {
+                        categoryService.delete(
+                            call.parameters.getOrFail("id"),
+                            requireSession().userId
+                        )
+                        HttpStatusCode.NoContent
+                    }
+                }
+            }
+        }
+    }
+}

api/src/main/kotlin/com/wbrawner/twigs/RecurringTransactionRoutes.kt

@@ -0,0 +1,62 @@
+package com.wbrawner.twigs
+
+import com.wbrawner.twigs.service.recurringtransaction.RecurringTransactionRequest
+import com.wbrawner.twigs.service.recurringtransaction.RecurringTransactionService
+import com.wbrawner.twigs.service.requireSession
+import com.wbrawner.twigs.service.respondCatching
+import io.ktor.http.*
+import io.ktor.server.application.*
+import io.ktor.server.auth.*
+import io.ktor.server.request.*
+import io.ktor.server.routing.*
+import io.ktor.server.util.*
+
+fun Application.recurringTransactionRoutes(recurringTransactionService: RecurringTransactionService) {
+    routing {
+        route("/api/recurringtransactions") {
+            authenticate(optional = false) {
+                get {
+                    call.respondCatching {
+                        recurringTransactionService.recurringTransactions(
+                            budgetId = call.request.queryParameters.getOrFail("budgetId"),
+                            userId = requireSession().userId
+                        )
+                    }
+                }
+
+                get("/{id}") {
+                    call.respondCatching {
+                        recurringTransactionService.recurringTransaction(
+                            call.parameters.getOrFail("id"),
+                            requireSession().userId
+                        )
+                    }
+                }
+
+                post {
+                    call.respondCatching {
+                        recurringTransactionService.save(
+                            request = call.receive<RecurringTransactionRequest>(),
+                            userId = requireSession().userId
+                        )
+                    }
+                }
+
+                put("/{id}") {
+                    recurringTransactionService.save(
+                        request = call.receive<RecurringTransactionRequest>(),
+                        userId = requireSession().userId,
+                        recurringTransactionId = call.parameters.getOrFail("id")
+                    )
+                }
+
+                delete("/{id}") {
+                    call.respondCatching {
+                        recurringTransactionService.delete(call.parameters.getOrFail("id"), requireSession().userId)
+                        HttpStatusCode.NoContent
+                    }
+                }
+            }
+        }
+    }
+}

api/src/main/kotlin/com/wbrawner/twigs/TransactionRoutes.kt

@@ -0,0 +1,87 @@
+package com.wbrawner.twigs
+
+import com.wbrawner.twigs.service.requireSession
+import com.wbrawner.twigs.service.respondCatching
+import com.wbrawner.twigs.service.transaction.BalanceResponse
+import com.wbrawner.twigs.service.transaction.TransactionRequest
+import com.wbrawner.twigs.service.transaction.TransactionService
+import io.ktor.http.*
+import io.ktor.server.application.*
+import io.ktor.server.auth.*
+import io.ktor.server.request.*
+import io.ktor.server.routing.*
+import io.ktor.server.util.*
+import java.time.Instant
+
+fun Application.transactionRoutes(transactionService: TransactionService) {
+    routing {
+        route("/api/transactions") {
+            authenticate(optional = false) {
+                get {
+                    call.respondCatching {
+                        transactionService.transactions(
+                            budgetIds = call.request.queryParameters.getAll("budgetIds").orEmpty(),
+                            categoryIds = call.request.queryParameters.getAll("categoryIds"),
+                            from = call.request.queryParameters["from"]?.let { Instant.parse(it) },
+                            to = call.request.queryParameters["to"]?.let { Instant.parse(it) },
+                            expense = call.request.queryParameters["expense"]?.toBoolean(),
+                            userId = requireSession().userId
+                        )
+                    }
+                }
+
+                get("/{id}") {
+                    call.respondCatching {
+                        transactionService.transaction(
+                            transactionId = call.parameters.getOrFail("id"),
+                            userId = requireSession().userId
+                        )
+                    }
+                }
+
+                get("/sum") {
+                    call.respondCatching {
+                        BalanceResponse(
+                            transactionService.sum(
+                                budgetId = call.request.queryParameters["budgetId"],
+                                categoryId = call.request.queryParameters["categoryId"],
+                                from = call.request.queryParameters["from"]?.toInstant() ?: firstOfMonth,
+                                to = call.request.queryParameters["to"]?.toInstant() ?: endOfMonth,
+                                userId = requireSession().userId,
+                            )
+                        )
+                    }
+                }
+
+                post {
+                    call.respondCatching {
+                        transactionService.save(
+                            request = call.receive<TransactionRequest>(),
+                            userId = requireSession().userId
+                        )
+                    }
+                }
+
+                put("/{id}") {
+                    call.respondCatching {
+                        transactionService.save(
+                            request = call.receive<TransactionRequest>(),
+                            userId = requireSession().userId,
+                            transactionId = call.parameters.getOrFail("id")
+                        )
+                    }
+                }
+
+                delete("/{id}") {
+                    call.respondCatching {
+                        transactionService.delete(
+                            transactionId = call.parameters.getOrFail("id"),
+                            userId = requireSession().userId
+                        )
+                        HttpStatusCode.NoContent
+                    }
+                }
+            }
+        }
+    }
+}

api/src/main/kotlin/com/wbrawner/twigs/UserRoutes.kt

@@ -0,0 +1,84 @@
+package com.wbrawner.twigs
+
+import com.wbrawner.twigs.service.requireSession
+import com.wbrawner.twigs.service.respondCatching
+import com.wbrawner.twigs.service.user.UserService
+import io.ktor.http.*
+import io.ktor.server.application.*
+import io.ktor.server.auth.*
+import io.ktor.server.request.*
+import io.ktor.server.routing.*
+import io.ktor.server.util.*
+
+fun Application.userRoutes(userService: UserService) {
+    routing {
+        route("/api/users") {
+            post("/login") {
+                call.respondCatching {
+                    userService.login(call.receive())
+                }
+            }
+
+            post("/register") {
+                call.respondCatching {
+                    userService.register(call.receive())
+                }
+            }
+
+
+            route("/resetpassword") {
+                post {
+                    call.respondCatching {
+                        userService.requestPasswordResetEmail(call.receive())
+                        HttpStatusCode.Accepted
+                    }
+                }
+
+                put {
+                    call.respondCatching {
+                        userService.resetPassword(call.receive())
+                        HttpStatusCode.NoContent
+                    }
+                }
+            }
+
+            authenticate(optional = false) {
+                get {
+                    call.respondCatching {
+                        userService.users(
+                            query = call.request.queryParameters["query"],
+                            budgetIds = call.request.queryParameters.getAll("budgetId"),
+                            requestingUserId = requireSession().userId
+                        )
+                    }
+                }
+
+                get("/{id}") {
+                    call.respondCatching {
+                        userService.user(call.parameters.getOrFail("id"))
+                    }
+                }
+
+                put("/{id}") {
+                    call.respondCatching {
+                        userService.save(
+                            request = call.receive(),
+                            targetUserId = call.parameters.getOrFail("id"),
+                            requestingUserId = requireSession().userId
+                        )
+                    }
+                }
+
+                delete("/{id}") {
+                    call.respondCatching {
+                        userService.delete(
+                            targetUserId = call.parameters.getOrFail("id"),
+                            requestingUserId = requireSession().userId
+                        )
+                        HttpStatusCode.NoContent
+                    }
+                }
+            }
+        }
+    }
+}

api/src/main/resources/application.properties

@@ -1,10 +0,0 @@
-spring.jpa.hibernate.ddl-auto=none
-spring.datasource.url=jdbc:mysql://localhost:3306/budget
-spring.datasource.username=budget
-spring.datasource.password=budget
-spring.profiles.active=prod
-spring.session.jdbc.initialize-schema=always
-spring.datasource.testWhileIdle=true
-spring.datasource.timeBetweenEvictionRunsMillis=60000
-spring.datasource.validationQuery=SELECT 1
-twigs.cors.domains=*

app/.gitignore

@@ -0,0 +1 @@
+build/

app/build.gradle.kts

@@ -0,0 +1,61 @@
+import java.net.URI
+
+plugins {
+    java
+    kotlin("jvm")
+    application
+    alias(libs.plugins.shadow)
+}
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+    maven {
+        url = URI("https://repo.maven.apache.org/maven2")
+    }
+}
+
+dependencies {
+    implementation(project(":api"))
+    implementation(project(":core"))
+    implementation(project(":db"))
+    implementation(project(":web"))
+    implementation(libs.kotlin.reflect)
+    implementation(libs.bundles.ktor.server)
+    implementation(libs.kotlinx.coroutines.core)
+    implementation(libs.bcrypt)
+    implementation(libs.logback)
+    implementation(libs.mail)
+    implementation(project(mapOf("path" to ":service")))
+    testImplementation(project(":testhelpers"))
+    testImplementation(libs.ktor.client.content.negotiation)
+    testImplementation(libs.ktor.server.test)
+}
+
+description = "twigs-server"
+
+val twigsMain = "com.wbrawner.twigs.server.ApplicationKt"
+
+application {
+    mainClass.set(twigsMain)
+}
+
+tasks.shadowJar {
+    manifest {
+        attributes("Main-Class" to twigsMain)
+        archiveBaseName.set("twigs")
+        archiveClassifier.set("")
+        archiveVersion.set("")
+    }
+}
+
+tasks.getByName<Test>("test") {
+    useJUnitPlatform()
+}
+
+tasks.test {
+    reports {
+        junitXml.required.set(true)
+        html.required.set(false)
+    }
+}

app/src/main/kotlin/com/wbrawner/twigs/server/Application.kt

@@ -0,0 +1,274 @@
+package com.wbrawner.twigs.server
+
+import at.favre.lib.crypto.bcrypt.BCrypt
+import com.github.mustachejava.DefaultMustacheFactory
+import com.wbrawner.twigs.*
+import com.wbrawner.twigs.db.*
+import com.wbrawner.twigs.model.CookieSession
+import com.wbrawner.twigs.model.HeaderSession
+import com.wbrawner.twigs.model.Session
+import com.wbrawner.twigs.service.budget.BudgetService
+import com.wbrawner.twigs.service.budget.DefaultBudgetService
+import com.wbrawner.twigs.service.category.CategoryService
+import com.wbrawner.twigs.service.category.DefaultCategoryService
+import com.wbrawner.twigs.service.recurringtransaction.DefaultRecurringTransactionService
+import com.wbrawner.twigs.service.recurringtransaction.RecurringTransactionService
+import com.wbrawner.twigs.service.transaction.DefaultTransactionService
+import com.wbrawner.twigs.service.transaction.TransactionService
+import com.wbrawner.twigs.service.user.DefaultUserService
+import com.wbrawner.twigs.service.user.UserService
+import com.wbrawner.twigs.storage.PasswordHasher
+import com.wbrawner.twigs.web.user.TWIGS_SESSION_COOKIE
+import com.wbrawner.twigs.web.webRoutes
+import com.zaxxer.hikari.HikariConfig
+import com.zaxxer.hikari.HikariDataSource
+import io.ktor.client.request.forms.*
+import io.ktor.http.*
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.server.application.*
+import io.ktor.server.auth.*
+import io.ktor.server.cio.*
+import io.ktor.server.engine.*
+import io.ktor.server.mustache.*
+import io.ktor.server.plugins.callloging.*
+import io.ktor.server.plugins.contentnegotiation.*
+import io.ktor.server.plugins.cors.routing.*
+import io.ktor.server.plugins.forwardedheaders.*
+import io.ktor.server.response.*
+import io.ktor.server.sessions.*
+import kotlinx.coroutines.*
+import kotlinx.serialization.json.Json
+import java.util.concurrent.TimeUnit
+
+fun main() {
+    embeddedServer(
+        CIO,
+        port = System.getenv("PORT")?.toIntOrNull() ?: 8080,
+        module = Application::module
+    ).start(wait = true)
+}
+
+private const val DATABASE_VERSION = 3
+
+fun Application.module() {
+    val dbType = System.getenv("TWIGS_DB_TYPE") ?: "sqlite"
+    val dbHost = System.getenv("TWIGS_DB_HOST") ?: "localhost"
+    val dbPort = System.getenv("TWIGS_DB_PORT") ?: "5432"
+    val dbName = System.getenv("TWIGS_DB_NAME") ?: "twigs"
+    val dbUser = System.getenv("TWIGS_DB_USER") ?: "twigs"
+    val dbPass = System.getenv("TWIGS_DB_PASS") ?: "twigs"
+    val jdbcUrl = when (dbType) {
+        "postgresql" -> {
+            "jdbc:$dbType://$dbHost:$dbPort/$dbName?stringtype=unspecified"
+        }
+
+        "sqlite" -> {
+            Class.forName("org.sqlite.JDBC")
+            "jdbc:$dbType:$dbName"
+        }
+
+        else -> {
+            throw RuntimeException("Unsupported DB type: $dbType")
+        }
+    }
+    HikariDataSource(HikariConfig().apply {
+        setJdbcUrl(jdbcUrl)
+        username = dbUser
+        password = dbPass
+    }).also {
+        val metadataRepository = JdbcMetadataRepository(it)
+        val metadata = runBlocking {
+            val metadata = (metadataRepository.findAll().firstOrNull() ?: DatabaseMetadata())
+            var version = metadata.version
+            while (currentCoroutineContext().isActive && version++ < DATABASE_VERSION) {
+                metadataRepository.runMigration(version)
+                metadataRepository.save(metadata.copy(version = version))
+            }
+            if (metadata.salt.isBlank()) {
+                metadataRepository.save(
+                    metadata.copy(
+                        salt = System.getenv("TWIGS_PW_SALT")
+                            ?: randomString(16)
+                    )
+                )
+            } else {
+                metadata
+            }
+        }
+        val budgetRepository = JdbcBudgetRepository(it)
+        val categoryRepository = JdbcCategoryRepository(it)
+        val permissionRepository = JdbcPermissionRepository(it)
+        val passwordResetRepository = JdbcPasswordResetRepository(it)
+        val passwordHasher = PasswordHasher { password ->
+            String(BCrypt.withDefaults().hash(10, metadata.salt.toByteArray(), password.toByteArray()))
+        }
+        val recurringTransactionRepository = JdbcRecurringTransactionRepository(it)
+        val sessionRepository = JdbcSessionRepository(it)
+        val transactionRepository = JdbcTransactionRepository(it)
+        val userRepository = JdbcUserRepository(it)
+        val emailService = SmtpEmailService(
+            from = System.getenv("TWIGS_SMTP_FROM"),
+            host = System.getenv("TWIGS_SMTP_HOST"),
+            port = System.getenv("TWIGS_SMTP_PORT")?.toIntOrNull(),
+            username = System.getenv("TWIGS_SMTP_USER"),
+            password = System.getenv("TWIGS_SMTP_PASS"),
+        )
+        val jobs = listOf(
+            SessionCleanupJob(sessionRepository),
+            RecurringTransactionProcessingJob(recurringTransactionRepository, transactionRepository)
+        )
+        val sessionValidator: suspend ApplicationCall.(Session) -> Principal? = validate@{ session ->
+            application.environment.log.info("Validating session")
+            val storedSession = sessionRepository.findAll(session.token)
+                .firstOrNull()
+            if (storedSession == null) {
+                application.environment.log.info("Did not find session!")
+                return@validate null
+            } else {
+                application.environment.log.info("Found session!")
+            }
+            return@validate if (twoWeeksFromNow.isAfter(storedSession.expiration)) {
+                sessionRepository.save(storedSession.updateExpiration(newExpiration = twoWeeksFromNow))
+            } else {
+                null
+            }
+        }
+        moduleWithDependencies(
+            budgetService = DefaultBudgetService(budgetRepository, permissionRepository),
+            categoryService = DefaultCategoryService(categoryRepository, permissionRepository),
+            recurringTransactionService = DefaultRecurringTransactionService(
+                recurringTransactionRepository,
+                permissionRepository
+            ),
+            transactionService = DefaultTransactionService(
+                transactionRepository,
+                categoryRepository,
+                permissionRepository
+            ),
+            userService = DefaultUserService(
+                emailService,
+                passwordResetRepository,
+                permissionRepository,
+                sessionRepository,
+                userRepository,
+                passwordHasher
+            ),
+            jobs = jobs,
+            sessionValidator = sessionValidator
+        )
+    }
+}
+
+fun Application.moduleWithDependencies(
+    budgetService: BudgetService,
+    categoryService: CategoryService,
+    recurringTransactionService: RecurringTransactionService,
+    transactionService: TransactionService,
+    userService: UserService,
+    jobs: List<Job>,
+    sessionValidator: suspend ApplicationCall.(Session) -> Principal?
+) {
+    install(XForwardedHeaders)
+    install(CallLogging)
+    install(Authentication) {
+        session<Session> {
+            challenge {
+                call.respond(HttpStatusCode.Unauthorized)
+            }
+            validate(sessionValidator)
+        }
+        session<CookieSession>(TWIGS_SESSION_COOKIE) {
+            challenge {
+                call.respond(HttpStatusCode.Unauthorized)
+            }
+            validate(sessionValidator)
+        }
+    }
+    install(Sessions) {
+        header<Session>("Authorization") {
+            serializer = object : SessionSerializer<Session> {
+                override fun deserialize(text: String): HeaderSession {
+                    this@moduleWithDependencies.environment.log.info("Deserializing session!")
+                    return HeaderSession(token = text.substringAfter("Bearer "))
+                }
+
+                override fun serialize(session: Session): String = session.token
+            }
+        }
+
+        cookie<CookieSession>(TWIGS_SESSION_COOKIE) {
+            serializer = object : SessionSerializer<CookieSession> {
+                override fun deserialize(text: String): CookieSession {
+                    this@moduleWithDependencies.environment.log.info("Deserializing session!")
+                    return CookieSession(token = text)
+                }
+
+                override fun serialize(session: CookieSession): String = session.token
+            }
+            cookie.httpOnly = true
+            cookie.secure = true
+            cookie.extensions["SameSite"] = "Strict"
+        }
+    }
+    install(ContentNegotiation) {
+        json(json = Json {
+            ignoreUnknownKeys = true
+            encodeDefaults = true
+            explicitNulls = false
+            isLenient = true
+            allowSpecialFloatingPointValues = true
+            allowStructuredMapKeys = true
+            prettyPrint = false
+            useArrayPolymorphism = true
+        })
+
+        formData()
+    }
+    install(CORS) {
+        allowHost("twigs.wbrawner.com", listOf("http", "https")) // TODO: Make configurable
+        allowHost("localhost:4200", listOf("http", "https"))     // TODO: Make configurable
+        allowMethod(HttpMethod.Options)
+        allowMethod(HttpMethod.Get)
+        allowMethod(HttpMethod.Post)
+        allowMethod(HttpMethod.Put)
+        allowMethod(HttpMethod.Delete)
+        allowHeader(HttpHeaders.Authorization)
+        allowHeader(HttpHeaders.Accept)
+        allowHeader(HttpHeaders.AcceptEncoding)
+        allowHeader(HttpHeaders.AcceptLanguage)
+        allowHeader(HttpHeaders.Connection)
+        allowHeader(HttpHeaders.ContentType)
+        allowHeader(HttpHeaders.Host)
+        allowHeader(HttpHeaders.Origin)
+        allowHeader(HttpHeaders.AccessControlRequestHeaders)
+        allowHeader(HttpHeaders.AccessControlRequestMethod)
+        allowHeader("Sec-Fetch-Dest")
+        allowHeader("Sec-Fetch-Mode")
+        allowHeader("Sec-Fetch-Site")
+        allowHeader("sec-ch-ua")
+        allowHeader("sec-ch-ua-mobile")
+        allowHeader("sec-ch-ua-platform")
+        allowHeader(HttpHeaders.UserAgent)
+        allowHeader("DNT")
+        allowCredentials = true
+    }
+    install(Mustache) {
+        mustacheFactory = DefaultMustacheFactory("templates")
+    }
+    budgetRoutes(budgetService)
+    categoryRoutes(categoryService)
+    recurringTransactionRoutes(recurringTransactionService)
+    transactionRoutes(transactionService)
+    userRoutes(userService)
+    webRoutes(budgetService, categoryService, transactionService, userService)
+    launch {
+        while (currentCoroutineContext().isActive) {
+            jobs.forEach { it.run() }
+            delay(TimeUnit.HOURS.toMillis(1))
+        }
+    }
+}
+
+interface Job {
+    suspend fun run()
+}

app/src/main/kotlin/com/wbrawner/twigs/server/RecurringTransactionProcessingJob.kt

@@ -0,0 +1,92 @@
+package com.wbrawner.twigs.server
+
+import com.wbrawner.twigs.model.Frequency
+import com.wbrawner.twigs.model.Position
+import com.wbrawner.twigs.storage.RecurringTransactionRepository
+import com.wbrawner.twigs.storage.TransactionRepository
+import java.time.*
+import java.time.temporal.ChronoUnit
+import java.util.*
+import kotlin.math.ceil
+
+class RecurringTransactionProcessingJob(
+    private val recurringTransactionRepository: RecurringTransactionRepository,
+    private val transactionRepository: TransactionRepository
+) : Job {
+    override suspend fun run() {
+        val now = Instant.now()
+        val maxDaysInMonth = GregorianCalendar.getInstance(TimeZone.getTimeZone("UTC"))
+            .getActualMaximum(Calendar.DAY_OF_MONTH)
+        createTransactions(now, maxDaysInMonth)
+    }
+
+    suspend fun createTransactions(now: Instant, maxDaysInMonth: Int) {
+        recurringTransactionRepository.findAll(now).forEach {
+            val zonedNow = now.atZone(ZoneId.of("UTC"))
+            when (it.frequency) {
+                is Frequency.Daily -> {
+                    if (it.lastRun != null && ChronoUnit.DAYS.between(it.lastRun, now) < it.frequency.count)
+                        return@forEach
+                }
+                is Frequency.Weekly -> {
+                    it.lastRun?.let { last ->
+                        val zonedLastRun = last.atZone(ZoneId.of("UTC"))
+                        if (ChronoUnit.WEEKS.between(zonedLastRun, zonedNow) < it.frequency.count)
+                            return@forEach
+                    }
+                    if (!(it.frequency as Frequency.Weekly).daysOfWeek.contains(DayOfWeek.from(zonedNow)))
+                        return@forEach
+                }
+                is Frequency.Monthly -> {
+                    it.lastRun?.let { last ->
+                        val zonedLastRun = last.atZone(ZoneId.of("UTC"))
+                        val monthsPassed = ((zonedNow.year * 12) + zonedNow.monthValue) - ((zonedLastRun.year * 12) + zonedLastRun.monthValue)
+                        if (monthsPassed < it.frequency.count)
+                            return@forEach
+                    }
+                    val frequency = (it.frequency as Frequency.Monthly).dayOfMonth
+                    frequency.day?.let { day ->
+                        if (zonedNow.dayOfMonth != Integer.min(day, maxDaysInMonth))
+                            return@forEach
+                    }
+                    frequency.positionalDayOfWeek?.let { positionalDayOfWeek ->
+                        if (positionalDayOfWeek.dayOfWeek != DayOfWeek.from(now.atZone(ZoneId.of("UTC"))))
+                            return@forEach
+                        val dayOfMonth = now.atZone(ZoneId.of("UTC")).dayOfMonth
+                        val position = ceil(dayOfMonth / 7.0).toInt()
+                        when (positionalDayOfWeek.position) {
+                            Position.FIRST -> if (position != 1) return@forEach
+                            Position.SECOND -> if (position != 2) return@forEach
+                            Position.THIRD -> if (position != 3) return@forEach
+                            Position.FOURTH -> if (position != 4) return@forEach
+                            Position.LAST -> {
+                                if (dayOfMonth + 7 <= maxDaysInMonth)
+                                    return@forEach
+                            }
+                        }
+                    }
+                }
+                is Frequency.Yearly -> {
+                    it.lastRun?.let { last ->
+                        val zonedLastRun = last.atZone(ZoneId.of("UTC"))
+                        if (zonedNow.year - zonedLastRun.year < it.frequency.count)
+                            return@forEach
+                    }
+                    with((it.frequency as Frequency.Yearly).dayOfYear) {
+                        // If the user has selected Feb 29th, then on non-leap years we'll adjust the date to Feb 28th
+                        val adjustedMonthDay =
+                            if (this.month == Month.FEBRUARY && this.dayOfMonth == 29 && !Year.isLeap(zonedNow.year.toLong())) {
+                                MonthDay.of(2, 28)
+                            } else {
+                                this
+                            }
+                        if (MonthDay.from(zonedNow) != adjustedMonthDay)
+                            return@forEach
+                    }
+                }
+            }
+            transactionRepository.save(it.toTransaction(now))
+            recurringTransactionRepository.save(it.copy(lastRun = now))
+        }
+    }
+}

app/src/main/kotlin/com/wbrawner/twigs/server/SessionCleanupJob.kt

@@ -0,0 +1,9 @@
+package com.wbrawner.twigs.server
+
+import com.wbrawner.twigs.storage.SessionRepository
+
+class SessionCleanupJob(private val sessionRepository: SessionRepository) : Job {
+    override suspend fun run() {
+        sessionRepository.deleteExpired()
+    }
+}

app/src/main/kotlin/com/wbrawner/twigs/server/SmtpEmailService.kt

@@ -0,0 +1,77 @@
+package com.wbrawner.twigs.server
+
+import com.wbrawner.twigs.EmailService
+import com.wbrawner.twigs.model.PasswordResetToken
+import java.util.*
+import javax.mail.*
+import javax.mail.internet.InternetAddress
+import javax.mail.internet.MimeBodyPart
+import javax.mail.internet.MimeMessage
+import javax.mail.internet.MimeMultipart
+
+
+class SmtpEmailService(
+    val from: String?,
+    val host: String?,
+    val port: Int?,
+    val username: String?,
+    val password: String?
+) : EmailService {
+    private val canSendEmail = !from.isNullOrBlank()
+            && !host.isNullOrBlank()
+            && port != null
+            && !username.isNullOrBlank()
+            && !password.isNullOrBlank()
+
+    private val session = Session.getInstance(
+        Properties().apply {
+            put("mail.smtp.auth", "true")
+            put("mail.smtp.host", host ?: "")
+            put("mail.smtp.port", port ?: 25)
+            put("mail.smtp.from", from ?: "")
+        },
+        object : Authenticator() {
+            override fun getPasswordAuthentication(): PasswordAuthentication {
+                return PasswordAuthentication(username, password)
+            }
+        })
+
+    override fun sendPasswordResetEmail(token: PasswordResetToken, to: String) {
+        val resetUrl = "twigs://resetpassword?token=${token.id}"
+        val plainText = javaClass.getResource("/email/plain/passwordreset.txt")
+            ?.readText()
+            ?.replace("{reset_url}", resetUrl)
+        val html = javaClass.getResource("/email/html/passwordreset.html")
+            ?.readText()
+            ?.replace("{reset_url}", resetUrl)
+        sendEmail(
+            plainText,
+            html,
+            to,
+            "Twigs Password Reset" // TODO: Localization
+        )
+    }
+
+    private fun sendEmail(plainText: String?, html: String?, to: String, subject: String) {
+        if (!canSendEmail) return
+        if (plainText.isNullOrBlank() && html.isNullOrBlank()) return
+        val message = MimeMessage(session)
+        message.setFrom(InternetAddress(from, "Twigs"))
+        message.setRecipients(Message.RecipientType.TO, to)
+        val multipart: Multipart = MimeMultipart("alternative").apply {
+            plainText?.let {
+                addBodyPart(it.asMimeBodyPart("text/plain; charset=utf-8"))
+            }
+            html?.let {
+                addBodyPart(it.asMimeBodyPart("text/html; charset=utf-8"))
+            }
+        }
+        message.setContent(multipart)
+        message.subject = subject
+        Transport.send(message)
+    }
+
+    private fun String.asMimeBodyPart(mimeType: String): MimeBodyPart = MimeBodyPart().apply {
+        setContent(this@asMimeBodyPart, mimeType)
+    }
+}

app/src/main/resources/email/html/passwordreset.html

@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Twigs - Reset Your Password</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0"
+    "/>
+</head>
+<body>
+<style>
+    html, body {
+        font-family: sans-serif;
+        height: 100%;
+        height: 100vh;
+        background: white;
+    }
+
+    a {
+        color: #30d158;
+    }
+</style>
+<table width="100%" border="0" cellspacing="0" cellpadding="0">
+    <tr>
+        <td align="center">
+            <img src="https://twigs.wbrawner.com/favicon-96x96.png"/>
+        </td>
+    </tr>
+    <tr>
+        <td align="center">
+            <h1>Reset Your Password</h1>
+        </td>
+    </tr>
+    <tr>
+        <td align="center">
+            If you requested a password reset, please <a href="{reset_url}" target="_blank">click here</a> to complete
+            the
+            process. If
+            you didn't make this request,
+            you can ignore this email. Alternatively, you can copy and paste the link below in your browser:
+        </td>
+    </tr>
+    <tr>
+        <td align="center">
+            <pre>{reset_url}</pre>
+        </td>
+    </tr>
+</table>
+
+</body>
+</html>

app/src/main/resources/email/plain/passwordreset.txt

@@ -0,0 +1,5 @@
+Reset Your Password
+
+If you requested a password reset, please open the link below to complete the process. If you didn't make this request, you can ignore this email.
+
+{reset_url}

app/src/main/resources/openapi/documentation.yaml

@@ -0,0 +1,597 @@
+openapi: "3.0.3"
+info:
+  title: "twigs API"
+  description: "twigs API"
+  version: "1.0.0"
+servers:
+  - url: "https://twigs"
+paths:
+  /api/recurringtransactions:
+    get:
+      description: ""
+      parameters:
+        - name: "budgetId"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                type: "array"
+                items:
+                  $ref: "#/components/schemas/RecurringTransactionResponse"
+    post:
+      description: ""
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/RecurringTransactionResponse"
+  /api/recurringtransactions/{id}:
+    delete:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "204":
+          description: "No Content"
+          content:
+            '*/*':
+              schema:
+                type: "object"
+        "500":
+          description: "Internal Server Error"
+          content:
+            '*/*':
+              schema:
+                type: "object"
+    get:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/RecurringTransactionResponse"
+    put:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/RecurringTransactionResponse"
+  /api/categories:
+    get:
+      description: ""
+      parameters:
+        - name: "budgetIds"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+        - name: "expense"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+        - name: "archived"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                type: "array"
+                items:
+                  type: "object"
+    post:
+      description: ""
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/CategoryResponse"
+  /api/categories/{id}:
+    delete:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "204":
+          description: "No Content"
+          content:
+            '*/*':
+              schema:
+                type: "object"
+    get:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/CategoryResponse"
+    put:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "404":
+          description: "Not Found"
+          content:
+            '*/*':
+              schema:
+                type: "object"
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/CategoryResponse"
+  /api/passwordreset:
+    post:
+      description: ""
+      responses:
+        "204":
+          description: "No Content"
+          content:
+            '*/*':
+              schema:
+                type: "object"
+  /api/resetpassword:
+    post:
+      description: ""
+      responses:
+        "202":
+          description: "Accepted"
+          content:
+            '*/*':
+              schema:
+                type: "object"
+  /api/users:
+    get:
+      description: ""
+      parameters:
+        - name: "query"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+        - name: "budgetId"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                type: "array"
+                items:
+                  type: "object"
+    post:
+      description: ""
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/UserResponse"
+  /api/users/{id}:
+    delete:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "204":
+          description: "No Content"
+          content:
+            '*/*':
+              schema:
+                type: "object"
+    get:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/UserResponse"
+    put:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/UserResponse"
+  /api/users/login:
+    post:
+      description: ""
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/SessionResponse"
+  /api/users/register:
+    post:
+      description: ""
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/UserResponse"
+  /api/budgets:
+    get:
+      description: ""
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                type: "array"
+                items:
+                  type: "object"
+    post:
+      description: ""
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/BudgetResponse"
+  /api/budgets/{id}:
+    delete:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "204":
+          description: "No Content"
+          content:
+            '*/*':
+              schema:
+                type: "object"
+    get:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/BudgetResponse"
+    put:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/BudgetResponse"
+  /api/transactions:
+    get:
+      description: ""
+      parameters:
+        - name: "budgetIds"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+        - name: "categoryIds"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+        - name: "from"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+        - name: "to"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+        - name: "expense"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                type: "array"
+                items:
+                  $ref: "#/components/schemas/TransactionResponse"
+    post:
+      description: ""
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/TransactionResponse"
+  /api/transactions/{id}:
+    delete:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "204":
+          description: "No Content"
+          content:
+            '*/*':
+              schema:
+                type: "object"
+        "500":
+          description: "Internal Server Error"
+          content:
+            '*/*':
+              schema:
+                type: "object"
+    get:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/TransactionResponse"
+    put:
+      description: ""
+      parameters:
+        - name: "id"
+          in: "path"
+          required: true
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/TransactionResponse"
+  /api/transactions/sum:
+    get:
+      description: ""
+      parameters:
+        - name: "categoryId"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+        - name: "budgetId"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+        - name: "from"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+        - name: "to"
+          in: "query"
+          required: false
+          schema:
+            type: "string"
+      responses:
+        "200":
+          description: "OK"
+          content:
+            '*/*':
+              schema:
+                $ref: "#/components/schemas/BalanceResponse"
+components:
+  schemas:
+    RecurringTransactionResponse:
+      type: "object"
+      properties:
+        id:
+          type: "string"
+        title:
+          type: "string"
+        description:
+          type: "string"
+        frequency:
+          type: "string"
+        start:
+          type: "string"
+        finish:
+          type: "string"
+        amount:
+          type: "integer"
+          format: "int64"
+        expense:
+          type: "boolean"
+        budgetId:
+          type: "string"
+        categoryId:
+          type: "string"
+        createdBy:
+          type: "string"
+    CategoryResponse:
+      type: "object"
+      properties:
+        id:
+          type: "string"
+        title:
+          type: "string"
+        description:
+          type: "string"
+        amount:
+          type: "integer"
+          format: "int64"
+        budgetId:
+          type: "string"
+        expense:
+          type: "boolean"
+        archived:
+          type: "boolean"
+    UserResponse:
+      type: "object"
+      properties:
+        id:
+          type: "string"
+        username:
+          type: "string"
+        email:
+          type: "string"
+    SessionResponse:
+      type: "object"
+      properties:
+        userId:
+          type: "string"
+        token:
+          type: "string"
+        expiration:
+          type: "string"
+    BudgetResponse:
+      type: "object"
+      properties:
+        id:
+          type: "string"
+        name:
+          type: "string"
+        description:
+          type: "string"
+    TransactionResponse:
+      type: "object"
+      properties:
+        id:
+          type: "string"
+        title:
+          type: "string"
+        description:
+          type: "string"
+        date:
+          type: "string"
+        amount:
+          type: "integer"
+          format: "int64"
+        expense:
+          type: "boolean"
+        budgetId:
+          type: "string"
+        categoryId:
+          type: "string"
+        createdBy:
+          type: "string"
+    BalanceResponse:
+      type: "object"
+      properties:
+        balance:
+          type: "integer"
+          format: "int64"

app/src/test/kotlin/com/wbrawner/twigs/server/RecurringTransactionProcessingJobTest.kt

@@ -0,0 +1,356 @@
+package com.wbrawner.twigs.server
+
+import com.wbrawner.twigs.model.*
+import com.wbrawner.twigs.storage.RecurringTransactionRepository
+import com.wbrawner.twigs.storage.TransactionRepository
+import com.wbrawner.twigs.test.helpers.repository.FakeRecurringTransactionRepository
+import com.wbrawner.twigs.test.helpers.repository.FakeTransactionRepository
+import kotlinx.coroutines.test.runTest
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import java.time.*
+import java.time.temporal.ChronoUnit
+import java.time.temporal.TemporalUnit
+import java.util.*
+
+class RecurringTransactionProcessingJobTest {
+    private lateinit var recurringTransactionRepository: RecurringTransactionRepository
+    private lateinit var transactionRepository: TransactionRepository
+    private lateinit var job: RecurringTransactionProcessingJob
+
+    @BeforeEach
+    fun setup() {
+        recurringTransactionRepository = FakeRecurringTransactionRepository()
+        transactionRepository = FakeTransactionRepository()
+        job = RecurringTransactionProcessingJob(recurringTransactionRepository, transactionRepository)
+    }
+
+    @Test
+    fun `daily transactions are created every day`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+            RecurringTransaction(
+                title = "Daily transaction",
+                amount = 123,
+                frequency = Frequency.Daily(1, Time(9, 0, 0)),
+                expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 3)
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(3, createdTransactions.size)
+        assertEquals("1970-01-01T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1970-01-02T09:00:00Z", createdTransactions[1].date.toString())
+        assertEquals("1970-01-03T09:00:00Z", createdTransactions[2].date.toString())
+    }
+
+    @Test
+    fun `daily transactions are only created once per day`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+            RecurringTransaction(
+                title = "Daily transaction",
+                amount = 123,
+                frequency = Frequency.Daily(1, Time(9, 0, 0)),
+                expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 72, ChronoUnit.HOURS)
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(3, createdTransactions.size)
+        assertEquals("1970-01-01T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1970-01-02T09:00:00Z", createdTransactions[1].date.toString())
+        assertEquals("1970-01-03T09:00:00Z", createdTransactions[2].date.toString())
+    }
+
+    @Test
+    fun `daily transactions are created every other day`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+            RecurringTransaction(
+                title = "Daily transaction",
+                amount = 123,
+                frequency = Frequency.Daily(2, Time(9, 0, 0)),
+                expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 3)
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(2, createdTransactions.size)
+    }
+
+    @Test
+    fun `weekly transactions are created every thursday`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+            RecurringTransaction(
+                title = "Weekly transaction",
+                amount = 123,
+                frequency = Frequency.Weekly(1, setOf(DayOfWeek.THURSDAY), Time(9, 0, 0)),
+                expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 28)
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(4, createdTransactions.size)
+        assertEquals("1970-01-01T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1970-01-08T09:00:00Z", createdTransactions[1].date.toString())
+        assertEquals("1970-01-15T09:00:00Z", createdTransactions[2].date.toString())
+        assertEquals("1970-01-22T09:00:00Z", createdTransactions[3].date.toString())
+    }
+
+    @Test
+    fun `weekly transactions are created every third thursday`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+            RecurringTransaction(
+                title = "Weekly transaction",
+                amount = 123,
+                frequency = Frequency.Weekly(3, setOf(DayOfWeek.THURSDAY), Time(9, 0, 0)),
+                expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 28)
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(2, createdTransactions.size)
+        assertEquals("1970-01-01T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1970-01-22T09:00:00Z", createdTransactions[1].date.toString())
+    }
+
+    @Test
+    fun `monthly transactions are created every 1st of month`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+            RecurringTransaction(
+                title = "Monthly transaction",
+                amount = 123,
+                frequency = Frequency.Monthly(1, DayOfMonth.day(1), Time(9, 0, 0)),
+                expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 90)
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(3, createdTransactions.size)
+        assertEquals("1970-01-01T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1970-02-01T09:00:00Z", createdTransactions[1].date.toString())
+        assertEquals("1970-03-01T09:00:00Z", createdTransactions[2].date.toString())
+    }
+
+    @Test
+    fun `monthly transactions are created every last day of month when greater than max days in month`() =
+        runTest {
+            val start = Instant.parse("1970-01-01T00:00:00Z")
+            recurringTransactionRepository.save(
+                RecurringTransaction(
+                    title = "Monthly transaction",
+                    amount = 123,
+                    frequency = Frequency.Monthly(1, DayOfMonth.day(31), Time(9, 0, 0)),
+                    expense = true,
+                    start = start,
+                    createdBy = "tester",
+                    budgetId = "budgetId"
+                )
+            )
+            loopFor(start, 120)
+            val createdTransactions = transactionRepository.findAll()
+            assertEquals(4, createdTransactions.size)
+            assertEquals("1970-01-31T09:00:00Z", createdTransactions[0].date.toString())
+            assertEquals("1970-02-28T09:00:00Z", createdTransactions[1].date.toString())
+            assertEquals("1970-03-31T09:00:00Z", createdTransactions[2].date.toString())
+            assertEquals("1970-04-30T09:00:00Z", createdTransactions[3].date.toString())
+        }
+
+    @Test
+    fun `monthly transactions are created every 6 months`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+            RecurringTransaction(
+                title = "Monthly transaction",
+                amount = 123,
+                frequency = Frequency.Monthly(6, DayOfMonth.day(15), Time(9, 0, 0)),
+                expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 197)
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(2, createdTransactions.size)
+        assertEquals("1970-01-15T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1970-07-15T09:00:00Z", createdTransactions[1].date.toString())
+    }
+
+    @Test
+    fun `monthly transactions are created every 2nd tuesday`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+            RecurringTransaction(
+                title = "Monthly transaction",
+                amount = 123,
+                frequency = Frequency.Monthly(
+                    1,
+                    DayOfMonth.positionalDayOfWeek(Position.SECOND, DayOfWeek.TUESDAY),
+                    Time(9, 0, 0)
+                ),
+                expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 120)
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(4, createdTransactions.size)
+        assertEquals("1970-01-13T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1970-02-10T09:00:00Z", createdTransactions[1].date.toString())
+        assertEquals("1970-03-10T09:00:00Z", createdTransactions[2].date.toString())
+        assertEquals("1970-04-14T09:00:00Z", createdTransactions[3].date.toString())
+    }
+
+    @Test
+    fun `monthly transactions are created every last friday`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+                RecurringTransaction(
+                        title = "Monthly transaction",
+                        amount = 123,
+                        frequency = Frequency.Monthly(
+                                1,
+                                DayOfMonth.positionalDayOfWeek(Position.LAST, DayOfWeek.FRIDAY),
+                                Time(9, 0, 0)
+                        ),
+                        expense = true,
+                        start = start,
+                        createdBy = "tester",
+                        budgetId = "budgetId"
+                )
+        )
+        loopFor(start, 120)
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(4, createdTransactions.size)
+        assertEquals("1970-01-30T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1970-02-27T09:00:00Z", createdTransactions[1].date.toString())
+        assertEquals("1970-03-27T09:00:00Z", createdTransactions[2].date.toString())
+        assertEquals("1970-04-24T09:00:00Z", createdTransactions[3].date.toString())
+    }
+
+    @Test
+    fun `monthly transactions are created in the new year`() = runTest {
+        val start = Instant.parse("1971-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+                RecurringTransaction(
+                        title = "Monthly transaction",
+                        amount = 123,
+                        frequency = Frequency.Monthly(
+                                1,
+                                DayOfMonth.day(1),
+                                Time(9, 0, 0)
+                        ),
+                        expense = true,
+                        start = start,
+                        createdBy = "tester",
+                        budgetId = "budgetId",
+                        lastRun = Instant.parse("1970-12-01T09:00:00Z")
+                )
+        )
+        loopFor(start, 1)
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(1, createdTransactions.size)
+        assertEquals("1971-01-01T09:00:00Z", createdTransactions[0].date.toString())
+    }
+
+    @Test
+    fun `yearly transactions are created every march 31st`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+                RecurringTransaction(
+                        title = "Yearly transaction",
+                        amount = 123,
+                        frequency = Frequency.Yearly(1, MonthDay.of(3, 31), Time(9, 0, 0)),
+                        expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 1460) // 4 years from Jan 1, 1970
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(4, createdTransactions.size)
+        assertEquals("1970-03-31T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1971-03-31T09:00:00Z", createdTransactions[1].date.toString())
+        assertEquals("1972-03-31T09:00:00Z", createdTransactions[2].date.toString()) // 1972 was a leap year
+        assertEquals("1973-03-31T09:00:00Z", createdTransactions[3].date.toString())
+    }
+
+    @Test
+    fun `yearly transactions are created every other march 31st`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+            RecurringTransaction(
+                title = "Yearly transaction",
+                amount = 123,
+                frequency = Frequency.Yearly(2, MonthDay.of(3, 31), Time(9, 0, 0)),
+                expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 1460) // 4 years from Jan 1, 1970
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(2, createdTransactions.size)
+        assertEquals("1970-03-31T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1972-03-31T09:00:00Z", createdTransactions[1].date.toString()) // 1972 was a leap year
+    }
+
+    @Test
+    fun `yearly transactions are created every february 29th`() = runTest {
+        val start = Instant.parse("1970-01-01T00:00:00Z")
+        recurringTransactionRepository.save(
+            RecurringTransaction(
+                title = "Yearly transaction",
+                amount = 123,
+                frequency = Frequency.Yearly(1, MonthDay.of(2, 29), Time(9, 0, 0)),
+                expense = true,
+                start = start,
+                createdBy = "tester",
+                budgetId = "budgetId"
+            )
+        )
+        loopFor(start, 1460) // 4 years from Jan 1, 1970
+        val createdTransactions = transactionRepository.findAll()
+        assertEquals(4, createdTransactions.size)
+        assertEquals("1970-02-28T09:00:00Z", createdTransactions[0].date.toString())
+        assertEquals("1971-02-28T09:00:00Z", createdTransactions[1].date.toString())
+        assertEquals("1972-02-29T09:00:00Z", createdTransactions[2].date.toString()) // 1972 was a leap year
+        assertEquals("1973-02-28T09:00:00Z", createdTransactions[3].date.toString())
+    }
+
+    private suspend fun loopFor(start: Instant, count: Int, timeUnit: TemporalUnit = ChronoUnit.DAYS) {
+        if (count == 0) return
+        val maxDays = GregorianCalendar.from(ZonedDateTime.ofInstant(start, ZoneId.of("UTC")))
+            .getActualMaximum(Calendar.DAY_OF_MONTH)
+        job.createTransactions(start, maxDays)
+        loopFor(start.plus(1, timeUnit), count - 1, timeUnit)
+    }
+}

app/src/test/kotlin/com/wbrawner/twigs/server/api/ApiTest.kt

@@ -0,0 +1,82 @@
+package com.wbrawner.twigs.server.api
+
+import com.wbrawner.twigs.server.moduleWithDependencies
+import com.wbrawner.twigs.service.budget.DefaultBudgetService
+import com.wbrawner.twigs.service.category.DefaultCategoryService
+import com.wbrawner.twigs.service.recurringtransaction.DefaultRecurringTransactionService
+import com.wbrawner.twigs.service.transaction.DefaultTransactionService
+import com.wbrawner.twigs.service.user.DefaultUserService
+import com.wbrawner.twigs.test.helpers.FakeEmailService
+import com.wbrawner.twigs.test.helpers.repository.*
+import io.ktor.client.*
+import io.ktor.client.plugins.contentnegotiation.*
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.server.testing.*
+import kotlinx.serialization.json.Json
+import org.junit.jupiter.api.BeforeEach
+
+open class ApiTest {
+    lateinit var budgetRepository: FakeBudgetRepository
+    lateinit var categoryRepository: FakeCategoryRepository
+    lateinit var emailService: FakeEmailService
+    lateinit var metadataRepository: FakeMetadataRepository
+    lateinit var passwordResetRepository: FakePasswordResetRepository
+    lateinit var permissionRepository: FakePermissionRepository
+    lateinit var recurringTransactionRepository: FakeRecurringTransactionRepository
+    lateinit var sessionRepository: FakeSessionRepository
+    lateinit var transactionRepository: FakeTransactionRepository
+    lateinit var userRepository: FakeUserRepository
+
+    @BeforeEach
+    fun setup() {
+        budgetRepository = FakeBudgetRepository()
+        categoryRepository = FakeCategoryRepository()
+        emailService = FakeEmailService()
+        metadataRepository = FakeMetadataRepository()
+        passwordResetRepository = FakePasswordResetRepository()
+        permissionRepository = FakePermissionRepository()
+        recurringTransactionRepository = FakeRecurringTransactionRepository()
+        sessionRepository = FakeSessionRepository()
+        transactionRepository = FakeTransactionRepository()
+        userRepository = FakeUserRepository()
+    }
+
+    fun apiTest(test: suspend ApiTest.(client: HttpClient) -> Unit) = testApplication {
+        application {
+            moduleWithDependencies(
+                budgetService = DefaultBudgetService(budgetRepository, permissionRepository),
+                categoryService = DefaultCategoryService(categoryRepository, permissionRepository),
+                recurringTransactionService = DefaultRecurringTransactionService(
+                    recurringTransactionRepository,
+                    permissionRepository
+                ),
+                transactionService = DefaultTransactionService(
+                    transactionRepository,
+                    categoryRepository,
+                    permissionRepository
+                ),
+                userService = DefaultUserService(
+                    emailService,
+                    passwordResetRepository,
+                    permissionRepository,
+                    sessionRepository,
+                    userRepository,
+                    { it }
+                ),
+                jobs = listOf(),
+                sessionValidator = {
+                    sessionRepository.findAll(it.token).firstOrNull()
+                }
+            )
+        }
+        val client = createClient {
+            install(ContentNegotiation) {
+                json(json = Json {
+                    encodeDefaults = true
+                    explicitNulls = false
+                })
+            }
+        }
+        test(client)
+    }
+}

app/src/test/kotlin/com/wbrawner/twigs/server/api/BudgetRouteTest.kt

@@ -0,0 +1,419 @@
+package com.wbrawner.twigs.server.api
+
+import com.wbrawner.twigs.model.*
+import com.wbrawner.twigs.service.budget.BudgetRequest
+import com.wbrawner.twigs.service.budget.BudgetResponse
+import com.wbrawner.twigs.service.user.UserPermissionRequest
+import com.wbrawner.twigs.service.user.UserPermissionResponse
+import io.ktor.client.call.*
+import io.ktor.client.request.*
+import io.ktor.http.*
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+
+class BudgetRouteTest : ApiTest() {
+
+    @Test
+    fun `fetching budgets requires authentication`() = apiTest { client ->
+        val response = client.get("/api/budgets")
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+    }
+
+    @Test
+    fun `fetching budgets returns empty list when there are no budgets`() = apiTest { client ->
+        val session = Session()
+        sessionRepository.save(session)
+        val response = client.get("/api/budgets") {
+            header("Authorization", "Bearer ${session.token}")
+        }
+        assertEquals(HttpStatusCode.OK, response.status)
+        assertEquals(0, response.body<List<BudgetResponse>>().size)
+    }
+
+    @Test
+    fun `fetching budgets only returns budgets for current user`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val currentUserBudget = budgetRepository.save(Budget(name = "Test User's Budget"))
+        val otherUserBudget = budgetRepository.save(Budget(name = "Other User's Budget"))
+        permissionRepository.save(
+            UserPermission(
+                budgetId = currentUserBudget.id,
+                userId = users[0].id,
+                Permission.OWNER
+            )
+        )
+        permissionRepository.save(UserPermission(budgetId = otherUserBudget.id, userId = users[1].id, Permission.OWNER))
+        val response = client.get("/api/budgets") {
+            header("Authorization", "Bearer ${session.token}")
+        }
+        val returnedBudgets = response.body<List<BudgetResponse>>()
+        assertEquals(HttpStatusCode.OK, response.status)
+        assertEquals(1, returnedBudgets.size)
+        assertEquals(currentUserBudget.id, returnedBudgets.first().id)
+    }
+
+    @Test
+    fun `creating budgets requires authentication`() = apiTest { client ->
+        val request = BudgetRequest("Test Budget", "A budget for testing")
+        val response = client.post("/api/budgets") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+    }
+
+    @Test
+    fun `newly created budgets are saved`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val permissions = setOf(
+            UserPermissionRequest(users[0].id, Permission.OWNER),
+            UserPermissionRequest(users[1].id, Permission.READ),
+        )
+        val request = BudgetRequest("Test Budget", "A budget for testing", permissions)
+        val response = client.post("/api/budgets") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.OK, response.status)
+        val responseBody: BudgetResponse = response.body()
+        assert(responseBody.id.isNotEmpty())
+        assertEquals("Test Budget", responseBody.name)
+        assertEquals("A budget for testing", responseBody.description)
+        assertEquals(2, responseBody.users.size)
+        assert(responseBody.users.containsAll(permissions.map { UserPermissionResponse(it.user, it.permission) }))
+    }
+
+    @Test
+    fun `newly created budgets include current user as owner if omitted`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val permissions = setOf(
+            UserPermissionRequest(users[1].id, Permission.OWNER),
+        )
+        val request = BudgetRequest("Test Budget", "A budget for testing", permissions)
+        val response = client.post("/api/budgets") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.OK, response.status)
+        val responseBody: BudgetResponse = response.body()
+        assert(responseBody.id.isNotEmpty())
+        assertEquals("Test Budget", responseBody.name)
+        assertEquals("A budget for testing", responseBody.description)
+        assertEquals(2, responseBody.users.size)
+        val expectedPermissions = listOf(
+            UserPermissionResponse(users[0].id, Permission.OWNER),
+            UserPermissionResponse(users[1].id, Permission.OWNER),
+        )
+        assert(responseBody.users.containsAll(expectedPermissions))
+    }
+
+    @Test
+    fun `updating budgets requires authentication`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val existingBudget = budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+        val request = BudgetRequest("Update Budget", "A budget for testing")
+        val response = client.put("/api/budgets/${existingBudget.id}") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+    }
+
+    @Test
+    fun `updating budgets returns forbidden for users with read only access`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val existingBudget = budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val permissions = setOf(
+            UserPermission(budgetId = existingBudget.id, userId = users[0].id, Permission.READ),
+            UserPermission(budgetId = existingBudget.id, userId = users[1].id, Permission.OWNER),
+        )
+        permissions.forEach {
+            permissionRepository.save(it)
+        }
+        val request = BudgetRequest("Update Budget", "A budget for testing")
+        val response = client.put("/api/budgets/${existingBudget.id}") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Forbidden, response.status)
+    }
+
+    @Test
+    fun `updating budgets returns forbidden for users with write only access`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val existingBudget = budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val permissions = setOf(
+            UserPermission(budgetId = existingBudget.id, userId = users[0].id, Permission.WRITE),
+            UserPermission(budgetId = existingBudget.id, userId = users[1].id, Permission.OWNER),
+        )
+        permissions.forEach {
+            permissionRepository.save(it)
+        }
+        val request = BudgetRequest("Update Budget", "A budget for testing")
+        val response = client.put("/api/budgets/${existingBudget.id}") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Forbidden, response.status)
+    }
+
+    @Test
+    fun `updating budgets returns success for users with manage access`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val existingBudget = budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val permissions = setOf(
+            UserPermission(budgetId = existingBudget.id, userId = users[0].id, Permission.MANAGE),
+            UserPermission(budgetId = existingBudget.id, userId = users[1].id, Permission.OWNER),
+        )
+        permissions.forEach {
+            permissionRepository.save(it)
+        }
+        val request = BudgetRequest("Update Budget", "An update budget for testing")
+        val response = client.put("/api/budgets/${existingBudget.id}") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.OK, response.status)
+        val updatedBudget: BudgetResponse = response.body()
+        assertEquals(request.name, updatedBudget.name)
+        assertEquals(request.description, updatedBudget.description)
+        val expectedUsers = permissions.map { UserPermissionResponse(it.userId, it.permission) }
+        val updatedUsers = updatedBudget.users
+        assertEquals(expectedUsers, updatedUsers)
+    }
+
+    @Test
+    fun `updating budgets returns forbidden for users with no access`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val existingBudget = budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val permissions = setOf(
+            UserPermission(budgetId = existingBudget.id, userId = users[1].id, Permission.OWNER),
+        )
+        permissions.forEach {
+            permissionRepository.save(it)
+        }
+        val request = BudgetRequest("Update Budget", "An update budget for testing")
+        val response = client.put("/api/budgets/${existingBudget.id}") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.NotFound, response.status)
+    }
+
+    @Test
+    fun `updating non-existent budgets returns not found`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val request = BudgetRequest("Update Budget", "An update budget for testing")
+        val response = client.put("/api/budgets/random-budget-id") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.NotFound, response.status)
+    }
+
+    @Test
+    fun `updating budgets returns forbidden for users with manage access attempting to remove owner`() =
+        apiTest { client ->
+            val users = listOf(
+                User(name = "testuser", password = "testpassword"),
+                User(name = "otheruser", password = "otherpassword"),
+            )
+            users.forEach { userRepository.save(it) }
+            val existingBudget =
+                budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+            val session = Session(userId = users.first().id)
+            sessionRepository.save(session)
+            val permissions = setOf(
+                UserPermission(budgetId = existingBudget.id, userId = users[0].id, Permission.MANAGE),
+                UserPermission(budgetId = existingBudget.id, userId = users[1].id, Permission.OWNER),
+            )
+            permissions.forEach {
+                permissionRepository.save(it)
+            }
+            val request = BudgetRequest(
+                "Update Budget",
+                "An update budget for testing",
+                setOf(
+                    UserPermissionRequest(users[0].id, Permission.OWNER),
+                    UserPermissionRequest(users[0].id, Permission.MANAGE),
+                )
+            )
+            val response = client.put("/api/budgets/${existingBudget.id}") {
+                header("Authorization", "Bearer ${session.token}")
+                header("Content-Type", "application/json")
+                setBody(request)
+            }
+            assertEquals(HttpStatusCode.Forbidden, response.status)
+        }
+
+    @Test
+    fun `deleting budgets requires authentication`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val existingBudget = budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+        val request = BudgetRequest("Update Budget", "A budget for testing")
+        val response = client.put("/api/budgets/${existingBudget.id}") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+    }
+
+    @Test
+    fun `deleting budgets returns forbidden for users with read only access`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val existingBudget = budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val permissions = setOf(
+            UserPermission(budgetId = existingBudget.id, userId = users[0].id, Permission.READ),
+            UserPermission(budgetId = existingBudget.id, userId = users[1].id, Permission.OWNER),
+        )
+        permissions.forEach {
+            permissionRepository.save(it)
+        }
+        val response = client.delete("/api/budgets/${existingBudget.id}") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+        }
+        assertEquals(HttpStatusCode.Forbidden, response.status)
+    }
+
+    @Test
+    fun `deleting budgets returns forbidden for users with write only access`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val existingBudget = budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val permissions = setOf(
+            UserPermission(budgetId = existingBudget.id, userId = users[0].id, Permission.WRITE),
+            UserPermission(budgetId = existingBudget.id, userId = users[1].id, Permission.OWNER),
+        )
+        permissions.forEach {
+            permissionRepository.save(it)
+        }
+        val response = client.delete("/api/budgets/${existingBudget.id}") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+        }
+        assertEquals(HttpStatusCode.Forbidden, response.status)
+    }
+
+    @Test
+    fun `deleting budgets returns forbidden for users with manage access`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val existingBudget = budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val permissions = setOf(
+            UserPermission(budgetId = existingBudget.id, userId = users[0].id, Permission.MANAGE),
+            UserPermission(budgetId = existingBudget.id, userId = users[1].id, Permission.OWNER),
+        )
+        permissions.forEach {
+            permissionRepository.save(it)
+        }
+        val response = client.delete("/api/budgets/${existingBudget.id}") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+        }
+        assertEquals(HttpStatusCode.Forbidden, response.status)
+    }
+
+    @Test
+    fun `deleting budgets returns success for users with owner access`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val existingBudget = budgetRepository.save(Budget(name = "Test Budget", description = "A budget for testing"))
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val permissions = setOf(
+            UserPermission(budgetId = existingBudget.id, userId = users[0].id, Permission.OWNER),
+            UserPermission(budgetId = existingBudget.id, userId = users[1].id, Permission.OWNER),
+        )
+        permissions.forEach {
+            permissionRepository.save(it)
+        }
+        val response = client.delete("/api/budgets/${existingBudget.id}") {
+            header("Authorization", "Bearer ${session.token}")
+            header("Content-Type", "application/json")
+        }
+        assertEquals(HttpStatusCode.NoContent, response.status)
+    }
+}

app/src/test/kotlin/com/wbrawner/twigs/server/api/PasswordResetRouteTest.kt

@@ -0,0 +1,92 @@
+package com.wbrawner.twigs.server.api
+
+import com.wbrawner.twigs.model.PasswordResetToken
+import com.wbrawner.twigs.randomString
+import com.wbrawner.twigs.service.ErrorResponse
+import com.wbrawner.twigs.service.user.PasswordResetRequest
+import com.wbrawner.twigs.service.user.ResetPasswordRequest
+import com.wbrawner.twigs.test.helpers.repository.FakeUserRepository.Companion.TEST_USER
+import io.ktor.client.call.*
+import io.ktor.client.request.*
+import io.ktor.http.*
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+import java.time.Instant
+import java.util.*
+
+class PasswordResetRouteTest : ApiTest() {
+    @Test
+    fun `reset password with invalid username returns 202`() = apiTest { client ->
+        val request = ResetPasswordRequest(username = "invaliduser")
+        val response = client.post("/api/users/resetpassword") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Accepted, response.status)
+        assert(emailService.emails.isEmpty())
+    }
+
+    @Test
+    fun `reset password with valid username returns 202`() = apiTest { client ->
+        val request = ResetPasswordRequest(username = "testuser")
+        val response = client.post("/api/users/resetpassword") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Accepted, response.status)
+        assertEquals(1, emailService.emails.size)
+        val email = emailService.emails.first()
+        assertEquals(TEST_USER.email, email.to)
+        assertEquals(1, passwordResetRepository.entities.size)
+        val passwordReset = passwordResetRepository.entities.first()
+        assertEquals(TEST_USER.id, passwordReset.userId)
+    }
+
+    @Test
+    fun `password reset with invalid token returns 401`() = apiTest { client ->
+        val request = PasswordResetRequest(token = randomString(), password = "newpass")
+        val response = client.put("/api/users/resetpassword") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+        val error = response.body<ErrorResponse>()
+        assertEquals("Invalid token", error.message)
+    }
+
+    @Test
+    fun `password reset with expired token returns 401`() = apiTest { client ->
+        val token = passwordResetRepository.save(PasswordResetToken(expiration = twoWeeksAgo))
+        val request = PasswordResetRequest(token = token.id, password = "newpass")
+        val response = client.put("/api/users/resetpassword") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+        val error = response.body<ErrorResponse>()
+        assertEquals("Token expired", error.message)
+    }
+
+    @Test
+    fun `password reset with valid token returns 204`() = apiTest { client ->
+        val token =
+            passwordResetRepository.save(PasswordResetToken(userId = userRepository.findAll("testuser").first().id))
+        val request = PasswordResetRequest(token = token.id, password = "newpass")
+        val response = client.put("/api/users/resetpassword") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.NoContent, response.status)
+        assertEquals(
+            "newpass",
+            userRepository.findAll(TEST_USER.name).first().password
+        )
+        assert(passwordResetRepository.entities.isEmpty())
+    }
+}
+
+private val twoWeeksAgo: Instant
+    get() = GregorianCalendar(TimeZone.getTimeZone("UTC")).run {
+        add(Calendar.DATE, -14)
+        toInstant()
+    }

app/src/test/kotlin/com/wbrawner/twigs/server/api/UserRouteTest.kt

@@ -0,0 +1,249 @@
+package com.wbrawner.twigs.server.api
+
+import com.wbrawner.twigs.model.Session
+import com.wbrawner.twigs.model.User
+import com.wbrawner.twigs.service.ErrorResponse
+import com.wbrawner.twigs.service.user.*
+import com.wbrawner.twigs.test.helpers.repository.FakeUserRepository.Companion.OTHER_USER
+import com.wbrawner.twigs.test.helpers.repository.FakeUserRepository.Companion.TEST_USER
+import io.ktor.client.call.*
+import io.ktor.client.request.*
+import io.ktor.http.*
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertNotNull
+import org.junit.jupiter.api.Test
+
+class UserRouteTest : ApiTest() {
+    @Test
+    fun `login with invalid username returns 401`() = apiTest { client ->
+        val request = LoginRequest("invalid", "pass")
+        val response = client.post("/api/users/login") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+        val errorBody = response.body<ErrorResponse>()
+        assertEquals("Invalid credentials", errorBody.message)
+    }
+
+    @Test
+    fun `login with empty username returns 401`() = apiTest { client ->
+        val request = LoginRequest("", "pass")
+        val response = client.post("/api/users/login") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+        val errorBody = response.body<ErrorResponse>()
+        assertEquals("Invalid credentials", errorBody.message)
+    }
+
+    @Test
+    fun `login with invalid password returns 401`() = apiTest { client ->
+        val request = LoginRequest(TEST_USER.name, "pass")
+        val response = client.post("/api/users/login") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+        val errorBody = response.body<ErrorResponse>()
+        assertEquals("Invalid credentials", errorBody.message)
+    }
+
+    @Test
+    fun `login with empty password returns 401`() = apiTest { client ->
+        val request = LoginRequest(TEST_USER.name, "")
+        val response = client.post("/api/users/login") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+        val errorBody = response.body<ErrorResponse>()
+        assertEquals("Invalid credentials", errorBody.message)
+    }
+
+    @Test
+    fun `login with valid username and password returns 200`() = apiTest { client ->
+        val request = LoginRequest(TEST_USER.name, TEST_USER.password)
+        val response = client.post("/api/users/login") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.OK, response.status)
+        val session = response.body<SessionResponse>()
+        assertEquals(TEST_USER.id, session.userId)
+        assert(session.token.isNotBlank())
+    }
+
+    @Test
+    fun `login with valid email and password returns 200`() = apiTest { client ->
+        val request = LoginRequest(requireNotNull(TEST_USER.email), TEST_USER.password)
+        val response = client.post("/api/users/login") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.OK, response.status)
+        val session = response.body<SessionResponse>()
+        assertEquals(TEST_USER.id, session.userId)
+        assert(session.token.isNotBlank())
+    }
+
+    @Test
+    fun `register with null username returns 400`() = apiTest { client ->
+        val request = UserRequest(password = "")
+        val response = client.post("/api/users/register") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.BadRequest, response.status)
+        val errorBody = response.body<ErrorResponse>()
+        assertEquals("username must not be null or blank", errorBody.message)
+    }
+
+    @Test
+    fun `register with empty username returns 400`() = apiTest { client ->
+        val request = UserRequest(username = "", password = "")
+        val response = client.post("/api/users/register") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.BadRequest, response.status)
+        val errorBody = response.body<ErrorResponse>()
+        assertEquals("username must not be null or blank", errorBody.message)
+    }
+
+    @Test
+    fun `register with null password returns 400`() = apiTest { client ->
+        val request = UserRequest(username = "test@example.com")
+        val response = client.post("/api/users/register") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.BadRequest, response.status)
+        val errorBody = response.body<ErrorResponse>()
+        assertEquals("password must not be null or blank", errorBody.message)
+    }
+
+    @Test
+    fun `register with empty password returns 400`() = apiTest { client ->
+        val request = UserRequest(username = "test@example.com", password = "")
+        val response = client.post("/api/users/register") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.BadRequest, response.status)
+        val errorBody = response.body<ErrorResponse>()
+        assertEquals("password must not be null or blank", errorBody.message)
+    }
+
+    @Test
+    fun `register with existing username returns 400`() = apiTest { client ->
+        val request = UserRequest(username = TEST_USER.name, password = "password")
+        val response = client.post("/api/users/register") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.BadRequest, response.status)
+        val errorBody = response.body<ErrorResponse>()
+        assertEquals("username or email already taken", errorBody.message)
+    }
+
+    @Test
+    fun `register with existing email returns 400`() = apiTest { client ->
+        val request = UserRequest(username = "testuser2", email = TEST_USER.email, password = "password")
+        val response = client.post("/api/users/register") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.BadRequest, response.status)
+        val errorBody = response.body<ErrorResponse>()
+        assertEquals("username or email already taken", errorBody.message)
+    }
+
+    @Test
+    fun `register with valid username and password returns 200`() = apiTest { client ->
+        val initialUserCount = userRepository.entities.size
+        val request = UserRequest("newuser", "newpass")
+        val response = client.post("/api/users/register") {
+            header("Content-Type", "application/json")
+            setBody(request)
+        }
+        assertEquals(HttpStatusCode.OK, response.status)
+        val userResponse = response.body<UserResponse>()
+        assert(userResponse.id.isNotBlank())
+        assertEquals(request.username, userResponse.username)
+        assertEquals(null, userResponse.email)
+        assertEquals(initialUserCount + 1, userRepository.entities.size)
+        val savedUser: User? = userRepository.findAll("newuser").firstOrNull()
+        assertNotNull(savedUser)
+        requireNotNull(savedUser)
+        assertEquals(userResponse.id, savedUser.id)
+        assertEquals(request.username, savedUser.name)
+        assertEquals(null, savedUser.email)
+        assertEquals("newpass", savedUser.password)
+    }
+
+    @Test
+    fun `get users requires authentication`() = apiTest { client ->
+        val response = client.get("/api/users")
+        assertEquals(HttpStatusCode.Unauthorized, response.status)
+    }
+
+    @Test
+    fun `get users with empty query returns 400`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val response = client.get("/api/users?query=") {
+            header("Authorization", "Bearer ${session.token}")
+        }
+        assertEquals(HttpStatusCode.BadRequest, response.status)
+        val error: ErrorResponse = response.body()
+        assertEquals("query cannot be empty", error.message)
+    }
+
+    @Test
+    fun `get users with valid query but no matches returns empty list`() = apiTest { client ->
+        val users = listOf(
+            User(name = "testuser", password = "testpassword"),
+            User(name = "otheruser", password = "otherpassword"),
+        )
+        users.forEach { userRepository.save(it) }
+        val session = Session(userId = users.first().id)
+        sessionRepository.save(session)
+        val response = client.get("/api/users?query=something") {
+            header("Authorization", "Bearer ${session.token}")
+        }
+        assertEquals(HttpStatusCode.OK, response.status)
+        val userQueryResponse: List<UserResponse> = response.body()
+        assertEquals(0, userQueryResponse.size)
+    }
+
+    @Test
+    fun `get users with valid query and matches returns list`() = apiTest { client ->
+        val session = Session(userId = TEST_USER.id)
+        sessionRepository.save(session)
+        val response = client.get("/api/users?query=user") {
+            header("Authorization", "Bearer ${session.token}")
+        }
+        assertEquals(HttpStatusCode.OK, response.status)
+        val userQueryResponse: List<UserResponse> = response.body()
+        assertEquals(2, userQueryResponse.size)
+        assertEquals(TEST_USER.asResponse(), userQueryResponse[0])
+        assertEquals(OTHER_USER.asResponse(), userQueryResponse[1])
+    }
+
+    @Test
+    fun `get users with empty budgetId returns 400`() = apiTest { client ->
+        val session = Session(userId = TEST_USER.id)
+        sessionRepository.save(session)
+        val response = client.get("/api/users?budgetId=") {
+            header("Authorization", "Bearer ${session.token}")
+        }
+        assertEquals(HttpStatusCode.BadRequest, response.status)
+    }
+}

build.gradle

@@ -1,29 +0,0 @@
-buildscript {
-    repositories {
-        mavenLocal()
-        mavenCentral()
-        maven { url "http://repo.spring.io/snapshot" }
-        maven { url "http://repo.spring.io/milestone" }
-    }
-
-    dependencies {
-        classpath "org.springframework.boot:spring-boot-gradle-plugin:2.4.3"
-    }
-}
-
-apply plugin: 'java'
-
-allprojects {
-    repositories {
-        mavenLocal()
-        mavenCentral()
-        maven { url "http://repo.spring.io/snapshot" }
-        maven { url "http://repo.spring.io/milestone" }
-        maven { url "http://repo.maven.apache.org/maven2" }
-    }
-
-    jar {
-        group = "com.wbrawner"
-        archiveVersion.set("0.0.1-SNAPSHOT")
-    }
-}

build.gradle.kts

@@ -0,0 +1,40 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+import java.net.URI
+
+buildscript {
+    repositories {
+        mavenLocal()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath(libs.kotlin.gradle)
+    }
+}
+
+plugins {
+    java
+    alias(libs.plugins.kotlin.jvm)
+    alias(libs.plugins.kotlin.serialization) apply false
+}
+
+val javaVersion = JavaVersion.VERSION_17
+
+allprojects {
+    repositories {
+        mavenLocal()
+        mavenCentral()
+        maven {
+            url = URI("https://repo.maven.apache.org/maven2")
+        }
+    }
+    group = "com.wbrawner"
+    version = "0.0.1-SNAPSHOT"
+    tasks.withType<JavaCompile> {
+        sourceCompatibility = javaVersion.majorVersion
+        targetCompatibility = javaVersion.majorVersion
+    }
+    tasks.withType<KotlinCompile> {
+        kotlinOptions.jvmTarget = javaVersion.majorVersion
+    }
+}

captain-definition

@@ -1,4 +0,0 @@
- {
-  "schemaVersion": 2,
-  "dockerfilePath": "./Dockerfile"
- }

core/.gitignore

@@ -0,0 +1 @@
+build/

core/build.gradle.kts

@@ -0,0 +1,15 @@
+plugins {
+    `java-library`
+    kotlin("jvm")
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    api(libs.ktor.server.auth)
+    testImplementation(libs.junit.jupiter.api)
+    testRuntimeOnly(libs.junit.jupiter.engine)
+}
+
+tasks.getByName<Test>("test") {
+    useJUnitPlatform()
+}

core/src/main/kotlin/com/wbrawner/twigs/EmailService.kt

@@ -0,0 +1,7 @@
+package com.wbrawner.twigs
+
+import com.wbrawner.twigs.model.PasswordResetToken
+
+interface EmailService {
+    fun sendPasswordResetEmail(token: PasswordResetToken, to: String)
+}

core/src/main/kotlin/com/wbrawner/twigs/Identifiable.kt

@@ -0,0 +1,5 @@
+package com.wbrawner.twigs
+
+interface Identifiable {
+    val id: String
+}

core/src/main/kotlin/com/wbrawner/twigs/Logger.kt

@@ -0,0 +1,5 @@
+package com.wbrawner.twigs
+
+interface Logger {
+    fun log(message: String)
+}

core/src/main/kotlin/com/wbrawner/twigs/Utils.kt

@@ -0,0 +1,62 @@
+package com.wbrawner.twigs
+
+import com.wbrawner.twigs.model.Frequency
+import java.time.Instant
+import java.time.format.DateTimeParseException
+import java.util.*
+
+private val CALENDAR_FIELDS = intArrayOf(
+    Calendar.MILLISECOND,
+    Calendar.SECOND,
+    Calendar.MINUTE,
+    Calendar.HOUR_OF_DAY,
+    Calendar.DATE
+)
+
+val firstOfMonth: Instant
+    get() = GregorianCalendar(TimeZone.getTimeZone("UTC")).run {
+        for (calField in CALENDAR_FIELDS) {
+            set(calField, getActualMinimum(calField))
+        }
+        toInstant()
+    }
+
+val endOfMonth: Instant
+    get() = GregorianCalendar(TimeZone.getTimeZone("UTC")).run {
+        for (calField in CALENDAR_FIELDS) {
+            set(calField, getActualMaximum(calField))
+        }
+        toInstant()
+    }
+
+val twoWeeksFromNow: Instant
+    get() = GregorianCalendar(TimeZone.getTimeZone("UTC")).run {
+        add(Calendar.DATE, 14)
+        toInstant()
+    }
+
+val tomorrow: Instant
+    get() = GregorianCalendar(TimeZone.getTimeZone("UTC")).run {
+        add(Calendar.DATE, 1)
+        toInstant()
+    }
+
+private const val CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+
+fun randomString(length: Int = 32): String {
+    val id = StringBuilder()
+    for (i in 0 until length) {
+        id.append(CHARACTERS.random())
+    }
+    return id.toString()
+}
+
+fun String.toInstant(): Instant = Instant.parse(this)
+
+fun String.toInstantOrNull(): Instant? = try {
+    Instant.parse(this)
+} catch (e: DateTimeParseException) {
+    null
+}
+
+fun String.asFrequency(): Frequency = Frequency.parse(this)

core/src/main/kotlin/com/wbrawner/twigs/model/Budget.kt

@@ -0,0 +1,11 @@
+package com.wbrawner.twigs.model
+
+import com.wbrawner.twigs.Identifiable
+import com.wbrawner.twigs.randomString
+
+data class Budget(
+    override val id: String = randomString(),
+    var name: String? = null,
+    var description: String? = null,
+    var currencyCode: String? = "USD",
+) : Identifiable

core/src/main/kotlin/com/wbrawner/twigs/model/Category.kt

@@ -0,0 +1,14 @@
+package com.wbrawner.twigs.model
+
+import com.wbrawner.twigs.Identifiable
+import com.wbrawner.twigs.randomString
+
+data class Category(
+    override val id: String = randomString(),
+    val title: String,
+    val amount: Long,
+    val budgetId: String,
+    val description: String? = null,
+    val expense: Boolean = true,
+    val archived: Boolean = false
+) : Identifiable

core/src/main/kotlin/com/wbrawner/twigs/model/PasswordResetToken.kt

@@ -0,0 +1,12 @@
+package com.wbrawner.twigs.model
+
+import com.wbrawner.twigs.Identifiable
+import com.wbrawner.twigs.randomString
+import com.wbrawner.twigs.tomorrow
+import java.time.Instant
+
+data class PasswordResetToken(
+    override val id: String = randomString(),
+    val userId: String = "",
+    var expiration: Instant = tomorrow
+) : Identifiable

core/src/main/kotlin/com/wbrawner/twigs/model/RecurringTransaction.kt

@@ -0,0 +1,197 @@
+package com.wbrawner.twigs.model
+
+import com.wbrawner.twigs.Identifiable
+import com.wbrawner.twigs.randomString
+import java.time.DayOfWeek
+import java.time.Instant
+import java.time.MonthDay
+
+data class RecurringTransaction(
+    override val id: String = randomString(),
+    val title: String,
+    val description: String? = null,
+    val frequency: Frequency,
+    val start: Instant,
+    val finish: Instant? = null,
+    val amount: Long,
+    val expense: Boolean,
+    val createdBy: String,
+    val categoryId: String? = null,
+    val budgetId: String,
+    val lastRun: Instant? = null
+) : Identifiable {
+    fun toTransaction(now: Instant = Instant.now()): Transaction = Transaction(
+        title = title,
+        description = description,
+        date = frequency.instant(now),
+        amount = amount,
+        expense = expense,
+        createdBy = createdBy,
+        categoryId = categoryId,
+        budgetId = budgetId
+    )
+}
+
+sealed class Frequency {
+    abstract val count: Int
+    abstract val time: Time
+
+    data class Daily(override val count: Int, override val time: Time) : Frequency() {
+        override fun toString(): String = "D;$count;$time"
+
+        companion object {
+            fun parse(s: String): Daily {
+                require(s[0] == 'D') { "Invalid format for Daily: $s" }
+                return with(s.split(';')) {
+                    Daily(
+                        get(1).toInt(),
+                        Time.parse(get(2))
+                    )
+                }
+            }
+        }
+    }
+
+    data class Weekly(override val count: Int, val daysOfWeek: Set<DayOfWeek>, override val time: Time) : Frequency() {
+        override fun toString(): String = "W;$count;${daysOfWeek.joinToString(",")};$time"
+        companion object {
+            fun parse(s: String): Weekly {
+                require(s[0] == 'W') { "Invalid format for Weekly: $s" }
+                return with(s.split(';')) {
+                    Weekly(
+                        get(1).toInt(),
+                        get(2).split(',').map { DayOfWeek.valueOf(it) }.toSet(),
+                        Time.parse(get(3))
+                    )
+                }
+            }
+        }
+    }
+
+    data class Monthly(
+        override val count: Int,
+        val dayOfMonth: DayOfMonth,
+        override val time: Time
+    ) : Frequency() {
+        override fun toString(): String = "M;$count;$dayOfMonth;$time"
+        companion object {
+            fun parse(s: String): Monthly {
+                require(s[0] == 'M') { "Invalid format for Monthly: $s" }
+                return with(s.split(';')) {
+                    Monthly(
+                        get(1).toInt(),
+                        DayOfMonth.parse(get(2)),
+                        Time.parse(get(3))
+                    )
+                }
+            }
+        }
+    }
+
+    data class Yearly(override val count: Int, val dayOfYear: MonthDay, override val time: Time) : Frequency() {
+        override fun toString(): String = "Y;$count;%02d-%02d;$time".format(dayOfYear.monthValue, dayOfYear.dayOfMonth)
+        companion object {
+            fun parse(s: String): Yearly {
+                require(s[0] == 'Y') { "Invalid format for Yearly: $s" }
+                return with(s.split(';')) {
+                    Yearly(
+                        get(1).toInt(),
+                        with(get(2).split("-")) {
+                            MonthDay.of(get(0).toInt(), get(1).toInt())
+                        },
+                        Time.parse(get(3))
+                    )
+                }
+            }
+        }
+    }
+
+    fun instant(now: Instant): Instant = Instant.parse(now.toString().split("T")[0] + "T" + time.toString() + "Z")
+
+    companion object {
+        fun parse(s: String): Frequency = when (s[0]) {
+            'D' -> Daily.parse(s)
+            'W' -> Weekly.parse(s)
+            'M' -> Monthly.parse(s)
+            'Y' -> Yearly.parse(s)
+            else -> throw IllegalArgumentException("Invalid frequency format: $s")
+        }
+    }
+}
+
+data class Time(val hours: Int, val minutes: Int, val seconds: Int) {
+    override fun toString(): String {
+        val s = StringBuilder()
+        if (hours < 10) {
+            s.append("0")
+        }
+        s.append(hours)
+        s.append(":")
+        if (minutes < 10) {
+            s.append("0")
+        }
+        s.append(minutes)
+        s.append(":")
+        if (seconds < 10) {
+            s.append("0")
+        }
+        s.append(seconds)
+        return s.toString()
+    }
+
+    companion object {
+        fun parse(s: String): Time {
+            require(s.length < 9) { "Invalid time format: $s. Time should be formatted as HH:mm:ss" }
+            require(s[2] == ':') { "Invalid time format: $s. Time should be formatted as HH:mm:ss" }
+            require(s[5] == ':') { "Invalid time format: $s. Time should be formatted as HH:mm:ss" }
+            return Time(
+                s.substring(0, 2).toInt(),
+                s.substring(3, 5).toInt(),
+                s.substring(7).toInt(),
+            )
+        }
+    }
+}
+
+class DayOfMonth private constructor(
+    val day: Int? = null,
+    val positionalDayOfWeek: PositionalDayOfWeek? = null
+) {
+    override fun toString() = day?.let { "DAY-${it}" } ?: positionalDayOfWeek!!.toString()
+
+    companion object {
+        fun day(day: Int): DayOfMonth {
+            require(day in 1..31) { "Day out of range: $day" }
+            return DayOfMonth(day = day)
+        }
+
+        fun positionalDayOfWeek(position: Position, dayOfWeek: DayOfWeek): DayOfMonth {
+            return DayOfMonth(positionalDayOfWeek = PositionalDayOfWeek(position, dayOfWeek))
+        }
+
+        fun parse(s: String): DayOfMonth = with(s.split("-")) {
+            when (size) {
+                2 -> when (first()) {
+                    "DAY" -> day(get(1).toInt())
+                    else -> positionalDayOfWeek(
+                        Position.valueOf(first()),
+                        DayOfWeek.valueOf(get(1))
+                    )
+                }
+                else -> throw IllegalArgumentException("Failed to parse string $s")
+            }
+        }
+    }
+
+    data class PositionalDayOfWeek(val position: Position, val dayOfWeek: DayOfWeek) {
+        override fun toString(): String = "${position.name}-${dayOfWeek.name}"
+    }
+}
+
+enum class Position {
+    FIRST,
+    SECOND,
+    THIRD,
+    FOURTH,
+    LAST
+}

core/src/main/kotlin/com/wbrawner/twigs/model/Session.kt

@@ -0,0 +1,25 @@
+package com.wbrawner.twigs.model
+
+import com.wbrawner.twigs.Identifiable
+import com.wbrawner.twigs.randomString
+import com.wbrawner.twigs.twoWeeksFromNow
+import io.ktor.server.auth.*
+import java.time.Instant
+
+open class Session(
+    override val id: String = randomString(),
+    val userId: String = "",
+    open val token: String = randomString(255),
+    val expiration: Instant = twoWeeksFromNow
+) : Principal, Identifiable {
+    fun updateExpiration(newExpiration: Instant) = Session(
+        id = id,
+        userId = userId,
+        token = token,
+        expiration = newExpiration
+    )
+}
+
+data class HeaderSession(override val token: String) : Session(token = token)
+
+data class CookieSession(override val token: String) : Session(token = token)

core/src/main/kotlin/com/wbrawner/twigs/model/Transaction.kt

@@ -0,0 +1,17 @@
+package com.wbrawner.twigs.model
+
+import com.wbrawner.twigs.Identifiable
+import com.wbrawner.twigs.randomString
+import java.time.Instant
+
+data class Transaction(
+    override val id: String = randomString(),
+    val title: String,
+    val description: String? = null,
+    val date: Instant,
+    val amount: Long,
+    val expense: Boolean,
+    val createdBy: String,
+    val categoryId: String? = null,
+    val budgetId: String
+) : Identifiable

core/src/main/kotlin/com/wbrawner/twigs/model/User.kt

@@ -1,24 +1,44 @@
-package com.wbrawner.budgetserver.permission;
+package com.wbrawner.twigs.model
 
-public enum Permission {
+import com.wbrawner.twigs.Identifiable
+import com.wbrawner.twigs.randomString
+import io.ktor.server.auth.*
+
+data class User(
+    override val id: String = randomString(),
+    val name: String = "",
+    val password: String = "",
+    val email: String? = null
+) : Principal, Identifiable
+
+enum class Permission {
     /**
      * The user can read the content but cannot make any modifications.
      */
     READ,
+
     /**
      * The user can read and write the content but cannot make any modifications to the container of the content.
      */
     WRITE,
+
     /**
      * The user can read and write the content, and make modifications to the container of the content including things like name, description, and other users' permissions (with the exception of the owner user, whose role can never be removed by a user with only MANAGE permissions).
      */
     MANAGE,
+
     /**
      * The user has complete control over the resource. There can only be a single owner user at any given time.
      */
     OWNER;
 
-    public boolean isNotAtLeast(Permission wanted) {
+    fun isAtLeast(wanted: Permission): Boolean {
-        return ordinal() < wanted.ordinal();
+        return ordinal >= wanted.ordinal
     }
 }
+
+data class UserPermission(
+    val budgetId: String,
+    val userId: String,
+    val permission: Permission = Permission.READ
+)