product overview issue fixed

Author: ishon19

ShopApp/.vscode/launch.json

@@ -0,0 +1,13 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Flutter",
+            "request": "launch",
+            "type": "dart"
+        }
+    ]
+}

ShopApp/lib/main.dart

@@ -22,10 +22,16 @@ class MyApp extends StatelessWidget {
   Widget build(BuildContext context) {
     return MultiProvider(
       providers: [
-        ChangeNotifierProvider(create: (ctx) => Products()),
+        ChangeNotifierProvider(create: (ctx) => Auth()),
+        ChangeNotifierProxyProvider<Auth, Products>(
+          create: null,
+          update: (ctx, auth, previousProducts) => Products(
+            auth.token,
+            previousProducts == null ? [] : previousProducts.items,
+          ),
+        ),
         ChangeNotifierProvider(create: (ctx) => Cart()),
         ChangeNotifierProvider(create: (ctx) => Order()),
-        ChangeNotifierProvider(create: (ctx) => Auth()),
       ],
       child: Consumer<Auth>(
         builder: (ctx, authData, _) => MaterialApp(

ShopApp/lib/providers/products.dart

@@ -1,10 +1,13 @@
 import 'package:ShopApp/models/httpException.dart';
+import 'package:ShopApp/providers/auth.dart';
 import 'package:ShopApp/providers/product.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:http/http.dart' as http;
 import 'dart:convert';
 
+import 'package:provider/provider.dart';
+
 class Products with ChangeNotifier {
   List<Product> _list = [
     // Product(
@@ -39,7 +42,11 @@ class Products with ChangeNotifier {
     //   imageUrl:
     //       'https://upload.wikimedia.org/wikipedia/commons/thumb/1/14/Cast-Iron-Pan.jpg/1024px-Cast-Iron-Pan.jpg',
     // ),
-  ];
+  ];  
+
+  final authToken;
+
+  Products(this.authToken, this._list);
 
   List<Product> get favItems {
     return _list.where((element) => element.isFavorite).toList();
@@ -54,7 +61,7 @@ class Products with ChangeNotifier {
   }
 
   Future<void> fetchProducts() async {
-    const url = 'https://fluttershopapp-f979d.firebaseio.com/products.json';
+    final url = 'https://fluttershopapp-f979d.firebaseio.com/products.json?auth=$authToken';
     try {
       final response = await http.get(url);
       List<Product> tempList = [];
@@ -65,20 +72,21 @@ class Products with ChangeNotifier {
           description: value['description'],
           id: key,
           title: value['title'],
-          price: value['price'],
+          price: double.parse(value['price'].toString()),
           imageUrl: value['imageUrl'],
           isFavorite: value['isFavorite'],
         ));
       });
       notifyListeners();
       _list = tempList;
     } catch (error) {
+      print(error);
       throw error;
     }
   }
 
   Future<void> addProduct(Product product) async {
-    const url = 'https://fluttershopapp-f979d.firebaseio.com/products.json';
+    const url = 'https://fluttershopapp-f979d.firebaseio.com/products.json?auth=$authToken';
     try {
       final response = await http.post(url,
           body: json.encode({
@@ -108,7 +116,7 @@ class Products with ChangeNotifier {
     int index = _list.indexWhere((element) => element.id == id);
     if (index >= 0) {
       final url =
-          'https://fluttershopapp-f979d.firebaseio.com/products/$id.json';
+          'https://fluttershopapp-f979d.firebaseio.com/products/$id.json?auth=$authToken';
       await http.patch(url,
           body: json.encode({
             'title': newProduct.title,
@@ -122,7 +130,7 @@ class Products with ChangeNotifier {
   }
 
   Future<void> deleteProduct(String id) async {
-    final url = 'https://fluttershopapp-f979d.firebaseio.com/products/$id.json';
+    final url = 'https://fluttershopapp-f979d.firebaseio.com/products/$id.json?auth=$authToken';
     int elementIndex = _list.indexWhere((element) => element.id == id);
     Product elementToBeDeleted = _list.elementAt(elementIndex);
     _list.removeWhere((element) => element.id == id);