Feat/refactor signals state

libs/features/budgetting/budgets/src/lib/budget-table/budget-table.component.html

@@ -0,0 +1,6 @@
+<table>
+  <tr *ngFor="let budget of budgets()">
+    <td>{{ budget.name }}</td>
+    <td>{{ budget.amount }}</td>
+  </tr>
+</table>

libs/features/budgetting/budgets/src/lib/budget-table/budget-table.component.ts

@@ -0,0 +1,10 @@
+import { Component, Input, Signal } from '@angular/core';
+import { Budget } from '../../models/budget.model';
+
+@Component({
+  selector: 'app-budget-table',
+  templateUrl: './budget-table.component.html',
+})
+export class BudgetTableComponent {
+  @Input() budgets!: Signal<Budget[]>;
+}

libs/features/budgetting/budgets/src/lib/select-budget-page/select-budget-page.component.html

@@ -0,0 +1,3 @@
+<div>
+  <app-budget-table [budgets]="allBudgets"></app-budget-table>
+</div>

libs/features/budgetting/budgets/src/lib/select-budget-page/select-budget-page.component.ts

@@ -0,0 +1,31 @@
+import { Component, inject, signal, computed, effect } from '@angular/core';
+import { BudgetService } from '../../services/budget.service';
+import { Budget } from '../../models/budget.model';
+
+@Component({
+  selector: 'app-select-budget-page',
+  templateUrl: './select-budget-page.component.html',
+})
+export class SelectBudgetPageComponent {
+  private budgetService = inject(BudgetService);
+
+  allBudgets = signal<Budget[]>([]);
+  selectedBudgetId = signal<string | null>(null);
+
+  overview = computed(() =>
+    this.allBudgets().find(b => b.id === this.selectedBudgetId())
+  );
+
+  constructor() {
+    this.loadBudgets();
+  }
+
+  loadBudgets() {
+    this.budgetService.getBudgets().subscribe(budgets => this.allBudgets.set(budgets));
+  }
+
+  selectBudget(budgetId: string) {
+    this.selectedBudgetId.set(budgetId);
+  }
+}
+

libs/model/budgetting/budget-notes/src/lib/domain/add-note.command.ts

@@ -0,0 +1,7 @@
+export class AddNoteToBudgetCommand {
+  constructor(
+    public readonly budgetId: string,
+    public readonly content: string,
+    public readonly createdBy: string,
+  ) {}
+}

libs/model/budgetting/budget-notes/src/lib/domain/add-note.handler.ts

@@ -0,0 +1,25 @@
+import { AddNoteToBudgetCommand } from './add-note.command';
+import { FunctionHandler } from '@ngfire/functions';
+
+export interface ICommandHandler<TCommand> {
+  execute(command: TCommand): Promise<void>;
+}
+
+export class AddNoteToBudgetHandler implements FunctionHandler<AddNoteToBudgetCommand, void>, ICommandHandler<AddNoteToBudgetCommand> {
+  async execute(command: AddNoteToBudgetCommand): Promise<void> {
+    if (!command.content || !command.budgetId) {
+      throw new Error('Budget ID and content are required');
+    }
+
+    const repo = this.getRepository();
+    await repo.addNote(command.budgetId, command.content, command.createdBy);
+  }
+
+  private getRepository() {
+    return {
+      addNote: async (budgetId: string, content: string, createdBy: string) => {
+        // logic to persist the note
+      }
+    };
+  }
+}