feat(persistance) : add DAO

src/app/dao/ProductDAO.ts

@@ -0,0 +1,21 @@
+import { Injectable } from '@angular/core';
+import { Product } from '../models/Product';
+import { BaseDAO } from './BaseDAO';
+import { DBProduct } from '../models/db/DBProduct';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ProductDAO extends BaseDAO<Product, DBProduct, DBProduct> {
+  constructor() {
+    super(Product.name);
+  }
+
+  protected override toDB(model: Product): DBProduct {
+    return new Product(model.barcode, model.name, model.image, model.id);
+  }
+
+  protected override fromDB(qR: DBProduct): Product {
+    return new DBProduct(qR.barcode, qR.name, qR.image, qR.id);
+  }
+}