update demo-ecommerce-example,

03_source/mobile/src/pages/DemoEcommerceExample/data/fetcher.ts

@@ -0,0 +1,57 @@
+import { ProductStore } from './ProductStore';
+
+export const fetchData = async () => {
+  const json = [
+    'beds.json',
+    'armchairs.json',
+    'coffee_tables.json',
+    'cushions.json',
+    'floor_lamps.json',
+    'office_chairs.json',
+  ];
+
+  var products = [];
+
+  json.forEach(async (category) => {
+    const products = await fetchProducts(category);
+
+    let categoryName = category.replace('.json', '');
+    categoryName = categoryName.replace('_', ' ');
+    categoryName = uppercaseWords(categoryName);
+
+    const productCategory = {
+      name: categoryName,
+      slug: category.replace('.json', ''),
+      cover: products[6].image,
+      products,
+    };
+
+    ProductStore.update((s) => {
+      s.products = [...s.products, productCategory];
+    });
+  });
+
+  return products;
+};
+
+const fetchProducts = async (category) => {
+  const response = await fetch(`products/${category}`);
+  const data = await response.json();
+
+  //  Set a product id
+  await data.forEach((d, i) => {
+    d.id = i + 1;
+  });
+
+  return data;
+};
+
+const uppercaseWords = (words) => {
+  words = words
+    .toLowerCase()
+    .split(' ')
+    .map((s) => s.charAt(0).toUpperCase() + s.substring(1))
+    .join(' ');
+
+  return words;
+};