Implement category creation

Twigs/Category/CategoryDetailsView.swift

@@ -15,7 +15,6 @@ struct CategoryDetailsView: View {
     @EnvironmentObject var apiService: TwigsApiService
     let budget: Budget
     @State var sum: Int? = 0
-    @State var editingCategory: Bool = false
     var spent: Int {
         get {
             if case let .success(sum) = categoryDataStore.sum {
@@ -49,12 +48,14 @@ struct CategoryDetailsView: View {
                 await categoryDataStore.sum(categoryId: category.id)
             }
             .navigationBarItems(trailing: Button(action: {
-                self.editingCategory = true
+                Task {
+                    await dataStore.edit(category)
+                }
             }) {
                 Text("edit")
             })
-            .sheet(isPresented: self.$editingCategory, onDismiss: {
-                self.editingCategory = false
+            .sheet(isPresented: self.$dataStore.editingCategory, onDismiss: {
+                self.dataStore.cancelEditCategory()
             }, content: {
                 CategoryFormSheet(categoryForm: CategoryForm(
                     category: category,

Twigs/Category/CategoryListView.swift

@@ -13,15 +13,27 @@ import TwigsCore
 struct CategoryListView: View {
     @EnvironmentObject var dataStore: DataStore
     @State var requestId: String = ""
+    private var budgetId: String {
+        get {
+            if case let .success(budget) = dataStore.budget {
+                return budget.id
+            } else {
+                return ""
+            }
+        }
+    }
     
     @ViewBuilder
     var body: some View {
+        List {
             InlineLoadingView(
                 data: $dataStore.categories,
                 action: { await self.dataStore.getCategories(budgetId: budget.id, expense: nil, archived: nil, count: nil, page: nil) },
                 errorTextLocalizedStringKey: "Failed to load categories"
             ) { categories in
-            List {
+                if categories.isEmpty {
+                    Text("no_categories")
+                } else {
                     Section {
                         ForEach(categories.filter { !$0.archived }) { category in
                             CategoryListItemView(CategoryDataStore(dataStore.apiService), budget: budget, category: category)
@@ -36,6 +48,25 @@ struct CategoryListView: View {
                     }
                 }
             }
+        }.refreshable {
+            await dataStore.getCategories()
+        }
+        .navigationBarItems(trailing: Button(action: {
+            Task {
+                await dataStore.edit(TwigsCore.Category(budgetId: budgetId))
+            }
+        }, label: {
+            Image(systemName: "plus").padding()
+        }))
+        .sheet(isPresented: self.$dataStore.editingCategory, onDismiss: {
+            self.dataStore.cancelEditCategory()
+        }, content: {
+            CategoryFormSheet(categoryForm: CategoryForm(
+                category: TwigsCore.Category(budgetId: budgetId),
+                dataStore: dataStore,
+                budgetId: budgetId
+            ))
+        })
     }
     
     private let budget: Budget

Twigs/DataStore.swift

@@ -28,6 +28,7 @@ class DataStore : ObservableObject {
     @Published var overview: AsyncData<BudgetOverview> = .empty
     @Published var showBudgetSelection: Bool = true
     @Published var editingBudget: Bool = false
+    @Published var editingCategory: Bool = false
 
     init(
         _ apiService: TwigsApiService
@@ -176,7 +177,14 @@ class DataStore : ObservableObject {
     }
     @Published var selectedCategory: TwigsCore.Category? = nil
     
-    func getCategories(budgetId: String? = nil, expense: Bool? = nil, archived: Bool? = false, count: Int? = nil, page: Int? = nil) async {
+    func getCategories() async {
+        guard case let .success(budget) = self.budget else {
+            return
+        }
+        await self.getCategories(budgetId: budget.id)
+    }
+    
+    func getCategories(budgetId: String, expense: Bool? = nil, archived: Bool? = false, count: Int? = nil, page: Int? = nil) async {
         self.categories = .loading
         do {
             let categories = try await apiService.getCategories(budgetId: budgetId, expense: expense, archived: archived, count: count, page: page)
@@ -196,6 +204,7 @@ class DataStore : ObservableObject {
                 savedCategory = try await self.apiService.createCategory(category)
             }
             self.category = .success(savedCategory)
+            self.editingCategory = false
             if case let .success(categories) = self.categories {
                 var updatedCategories = categories.filter(withoutId: category.id)
                 updatedCategories.append(savedCategory)
@@ -211,6 +220,7 @@ class DataStore : ObservableObject {
         do {
             try await self.apiService.deleteCategory(category.id)
             self.category = .empty
+            self.editingCategory = false
             if case let .success(categories) = self.categories {
                 self.categories = .success(categories.filter(withoutId: category.id))
             }
@@ -220,10 +230,12 @@ class DataStore : ObservableObject {
     }
     
     func edit(_ category: TwigsCore.Category) async {
+        self.editingCategory = true
         self.category = .editing(category)
     }
     
     func cancelEditCategory() {
+        self.editingCategory = false
         if let category = self.selectedCategory {
             self.category = .success(category)
         } else {