Enable querying budget and category sums for arbitrary date ranges

This only adds support via query params. Actual UI to use this needs to be built still

src/app/budgets/budget-details/budget-details.component.ts

@@ -32,13 +32,41 @@ export class BudgetDetailsComponent implements OnInit, OnDestroy, Actionable {
     { data: [0, 0], label: 'Expected' },
     { data: [0, 0], label: 'Actual' },
   ];
+  from: Date
+  to: Date
 
   constructor(
     private app: AppComponent,
     private route: ActivatedRoute,
     @Inject(TWIGS_SERVICE) private twigsService: TwigsService,
     private router: Router,
-  ) { }
+  ) {
+    let fromStr = this.route.snapshot.queryParamMap.get('from');
+    if (fromStr) {
+      let fromDate = new Date(fromStr);
+      if (!isNaN(fromDate.getTime())) {
+        this.from = fromDate;
+      }
+    }
+
+    if (!this.from) {
+      let date = new Date();
+      date.setHours(0);
+      date.setMinutes(0);
+      date.setSeconds(0);
+      date.setMilliseconds(0);
+      date.setDate(1);
+      this.from = date;
+    }
+
+    let toStr = this.route.snapshot.queryParamMap.get('to');
+    if (toStr) {
+      let toDate = new Date(toStr);
+      if (!isNaN(toDate.getTime())) {
+        this.to = toDate;
+      }
+    }
+  }
 
   ngOnInit() {
     this.getBudget();
@@ -87,7 +115,7 @@ export class BudgetDetailsComponent implements OnInit, OnDestroy, Actionable {
 
   getBalance(): void {
     const id = this.route.snapshot.paramMap.get('id');
-    this.twigsService.getBudgetBalance(id).subscribe(balance => {
+    this.twigsService.getBudgetBalance(id, this.from, this.to).subscribe(balance => {
       this.budgetBalance = balance;
     });
   }
@@ -116,7 +144,7 @@ export class BudgetDetailsComponent implements OnInit, OnDestroy, Actionable {
           this.income.push(category);
           this.expectedIncome += category.amount;
         }
-        this.twigsService.getCategoryBalance(category.id).subscribe(
+        this.twigsService.getCategoryBalance(category.id, this.from, this.to).subscribe(
           balance => {
             console.log(balance);
             if (category.expense) {

src/app/shared/twigs.http.service.ts

@@ -73,8 +73,20 @@ export class TwigsHttpService implements TwigsService {
     return this.budgets;
   }
 
-  getBudgetBalance(id: string): Observable<number> {
-    return this.http.get<any>(`${this.apiUrl}/transactions/sum?budgetId=${id}`, this.options)
+  getBudgetBalance(
+    id: string,
+    from?: Date,
+    to?: Date
+  ): Observable<number> {
+    let httpParams = new HttpParams();
+    if (from) {
+      httpParams = httpParams.set('from', from.toISOString());
+    }
+    if (to) {
+      httpParams = httpParams.set('to', to.toISOString());
+    }
+    const params = { params: httpParams };
+    return this.http.get<any>(`${this.apiUrl}/transactions/sum?budgetId=${id}`, { ...this.options, ...params })
       .pipe(map(obj => obj.balance));
   }
 
@@ -187,8 +199,20 @@ export class TwigsHttpService implements TwigsService {
     return this.http.get<Category>(`${this.apiUrl}/categories/${id}`, this.options);
   }
 
-  getCategoryBalance(id: string): Observable<number> {
-    return this.http.get<any>(`${this.apiUrl}/transactions/sum?categoryId=${id}`, this.options)
+  getCategoryBalance(
+    id: string,
+    from?: Date,
+    to?: Date
+  ): Observable<number> {
+    let httpParams = new HttpParams();
+    if (from) {
+      httpParams = httpParams.set('from', from.toISOString());
+    }
+    if (to) {
+      httpParams = httpParams.set('to', to.toISOString());
+    }
+    const params = { params: httpParams };
+    return this.http.get<any>(`${this.apiUrl}/transactions/sum?categoryId=${id}`, { ...this.options, ...params })
       .pipe(map(obj => obj.balance));
   }
 

src/app/shared/twigs.local.service.ts

@@ -66,7 +66,7 @@ export class TwigsLocalService implements TwigsService {
     });
   }
 
-  getBudgetBalance(id: string): Observable<number> {
+  getBudgetBalance(id: string, from?: Date, to?: Date): Observable<number> {
     return new Observable(emitter => {
       emitter.next(200);
       emitter.complete()
@@ -162,7 +162,7 @@ export class TwigsLocalService implements TwigsService {
     });
   }
 
-  getCategoryBalance(id: string): Observable<number> {
+  getCategoryBalance(id: string, from?: Date, to?: Date): Observable<number> {
     return new Observable(emitter => {
       emitter.next(20);
       emitter.complete()

src/app/shared/twigs.service.ts

@@ -14,7 +14,7 @@ export interface TwigsService {
   // Budgets
   getBudgets(): Observable<Budget[]>;
   getBudget(id: string): Observable<Budget>;
-  getBudgetBalance(id: string): Observable<number>;
+  getBudgetBalance(id: string, from?: Date, to?: Date): Observable<number>;
   createBudget(
     id: string,
     name: string,
@@ -27,7 +27,7 @@ export interface TwigsService {
   // Categories
   getCategories(budgetId?: string, count?: number): Observable<Category[]>;
   getCategory(id: string): Observable<Category>;
-  getCategoryBalance(id: string): Observable<number>;
+  getCategoryBalance(id: string, from?: Date, to?: Date): Observable<number>;
   createCategory(id: string, budgetId: string, name: string, description: string, amount: number, isExpense: boolean): Observable<Category>;
   updateCategory(id: string, changes: object): Observable<Category>;
   deleteCategory(id: string): Observable<void>;