scaffold expense list

src/app/services/expense.service.ts

@@ -0,0 +1,32 @@
+import { Injectable } from '@angular/core';
+import { SubCategory } from './sub-category.service';
+import { Category } from './category.service';
+import { Merchant } from './merchant.service';
+import { Tag } from './tag.service';
+import { HttpService } from './http.service';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ExpenseService {
+  public static readonly EXPENSE_PATH = 'http://localhost:3000/common-cents/expenses';
+
+  public constructor(private readonly http: HttpService) { }
+
+  public async getExpenses(): Promise<Expense[]> {
+    return this.http.get<Expense[]>(ExpenseService.EXPENSE_PATH);
+  }
+}
+
+export interface Expense {
+  id: string;
+  year: string;
+  month: string;
+  day: string;
+  cents: number;
+  description?: string;
+  category: Category;
+  subCategory?: SubCategory;
+  merchant?: Merchant;
+  tags: Tag[];
+}