From 67d75e4a5ec36f3dbc33a6927eb1b1e87447f3b9 Mon Sep 17 00:00:00 2001
From: MohammadIq123 <mohammad.k.m.sultan@gmail.com>
Date: Sun, 17 Oct 2021 18:12:42 +0300
Subject: [PATCH] fix: add single item to favorites list one time

---
 lib/main.dart                   | 35 ++++++++++++++++++++++++---------
 lib/models/users_viewmodel.dart | 17 +++++++++++-----
 2 files changed, 38 insertions(+), 14 deletions(-)

diff --git a/lib/main.dart b/lib/main.dart
index c55ccd4..803b566 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -65,12 +65,27 @@ class _MyHomePageState extends State<MyHomePage> {
                 child: Text(user.phone),
               ),
             ),
-            IconButton(
-              icon: Icon(Icons.add),
-              onPressed: () {
-                // var favoritesViewModel = context.read<FavoritesViewModel>();
-                var favoritesViewModel = Provider.of<UsersViewModel>(context, listen: false);
-                favoritesViewModel.insert(user);
+            Consumer<UsersViewModel>(
+              builder: (context, usersViewModel, child) {
+                if (!usersViewModel.iFFav(user)) {
+                  return IconButton(
+                    icon: Icon(Icons.add),
+                    onPressed: () {
+                      // var favoritesViewModel = context.read<FavoritesViewModel>();
+
+                      var favoritesViewModel =
+                          Provider.of<UsersViewModel>(context, listen: false);
+                      favoritesViewModel.insert(user);
+                    },
+                  );
+                } else {
+                  return IconButton(
+                    icon: Icon(Icons.download_done),
+                    onPressed: () {
+                      debugPrint('it is in favorites');
+                    },
+                  );
+                }
               },
             ),
           ],
@@ -100,11 +115,12 @@ class _MyHomePageState extends State<MyHomePage> {
         title: Text(widget.title),
         actions: [
           IconButton(
-            onPressed: () => Navigator.of(context).push(MaterialPageRoute(builder: (_context) => FavoritesPage())),
+            onPressed: () => Navigator.of(context).push(
+                MaterialPageRoute(builder: (_context) => FavoritesPage())),
             icon: Consumer<UsersViewModel>(
               builder: (context, favoritesViewModel, child) => Text(
                 '${favoritesViewModel.favorites.length}',
-                style: Theme.of(context).textTheme.headline4,
+                style: TextStyle(fontSize: 15),
               ),
             ),
           ),
@@ -113,7 +129,8 @@ class _MyHomePageState extends State<MyHomePage> {
       body: Center(child: Consumer<UsersViewModel>(
         builder: (context, usersViewModel, child) {
           debugPrint('building users list..');
-          debugPrint('usersViewModel.loadingState: ${usersViewModel.loadingState}');
+          debugPrint(
+              'usersViewModel.loadingState: ${usersViewModel.loadingState}');
 
           if (usersViewModel.loadingState == LoadingState.loading) {
             return const Center(child: CircularProgressIndicator());
diff --git a/lib/models/users_viewmodel.dart b/lib/models/users_viewmodel.dart
index b5f2a73..9f41910 100644
--- a/lib/models/users_viewmodel.dart
+++ b/lib/models/users_viewmodel.dart
@@ -21,9 +21,11 @@ class UsersViewModel extends ChangeNotifier {
     notifyListeners();
   }
 
-  void fetchUsers() async {
-
+  bool iFFav(User user) {
+    return favorites.contains(user);
+  }
 
+  void fetchUsers() async {
     loadingState = LoadingState.loading;
     notifyListeners();
 
@@ -38,16 +40,21 @@ class UsersViewModel extends ChangeNotifier {
       debugPrint('response.statusCode: ${response.statusCode}');
       var jsonUsers = jsonDecode(response.body);
       // jsonUsers[0]['name'] = null;
-      var users = jsonUsers.map<User>((_userJson) => User.fromJson(_userJson)).toList();
+      var users =
+          jsonUsers.map<User>((_userJson) => User.fromJson(_userJson)).toList();
 
       // debugPrint('users.length: ${users.length}');
       usersResponse = Tuple2(null, users);
       notifyListeners();
     } catch (e) {
       if (response?.statusCode == 200) {
-        usersResponse = Tuple2(ErrorResponse('توجد مشكلة في عرض المعلومات', response?.statusCode), null);
+        usersResponse = Tuple2(
+            ErrorResponse('توجد مشكلة في عرض المعلومات', response?.statusCode),
+            null);
       } else {
-        usersResponse = Tuple2(ErrorResponse('لا يمكن الإتصال. يرجى المحاولة فيما بعد...', -1), null);
+        usersResponse = Tuple2(
+            ErrorResponse('لا يمكن الإتصال. يرجى المحاولة فيما بعد...', -1),
+            null);
       }
 
       debugPrint('e: $e');