feat(product): add crate and edit ops in settings

src/app/services/product-settings.ts

@@ -0,0 +1,54 @@
+import { inject, Injectable } from '@angular/core';
+import { Location } from '@angular/common';
+import { Router } from '@angular/router';
+
+import { ImageStorage } from './image-storage';
+import { ProductDAO } from '../dao/ProductDAO';
+import { Product } from '../models/Product';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ProductSettings {
+  private readonly imageStorage = inject(ImageStorage);
+  private readonly location = inject(Location);
+  private readonly productDAO = inject(ProductDAO);
+  private readonly router = inject(Router);
+
+  async save(product: Product, img: File | null) {
+    try {
+      if (img) {
+        const imgFileName = await this.imageStorage.saveImage(img);
+        product.image = imgFileName;
+      }
+      await this.productDAO.insert(product);
+    } catch (e) {
+      //catch by message starts with SQLITE_CONSTRAINT_UNIQUE is duplicate
+      console.error(e)
+      //TODO: report problem
+    }
+    this.router.navigate(['settings', 'products']);
+    this.location.replaceState('products');
+  }
+
+  async update(prevProd: Product, updatedProd: Product, img: File | null) {
+    try {
+      let imgName = prevProd.name;
+      if (img) {
+        if (img.name !== imgName) {
+          imgName = await this.imageStorage.saveImage(img);
+          if (prevProd.image) {
+            this.imageStorage.deleteImage(prevProd.image);
+          }
+          updatedProd.image = imgName;
+        }
+      }
+      await this.productDAO.update(updatedProd, { id: updatedProd.id });
+    } catch (e) {
+      console.error(e);
+      //TODO: report problem
+    }
+    this.router.navigate(['settings', 'products']);
+    this.location.replaceState('products');
+  }
+}