✨ Add user suggestion page

Author: TheAlphamerc

CHANGELOG.md

@@ -13,6 +13,7 @@
 * New comment will be displayed on top.
 * Added link preview in tweet.
 * Bug fixed and performance improvements.
+* Display suggested users list to follow
 ## [1.0.6] - 17 Jul 2020
 
 * In user profile page three tabs are added to filter tweet and comment tweet and tweet with media.

lib/main.dart

@@ -1,5 +1,6 @@
 import 'package:firebase_core/firebase_core.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_twitter_clone/state/chats/suggestionUserState.dart';
 import 'package:google_fonts/google_fonts.dart';
 import 'package:provider/provider.dart';
 
@@ -35,6 +36,8 @@ class MyApp extends StatelessWidget {
         ChangeNotifierProvider<SearchState>(create: (_) => SearchState()),
         ChangeNotifierProvider<NotificationState>(
             create: (_) => NotificationState()),
+        ChangeNotifierProvider<SuggestionsState>(
+            create: (_) => SuggestionsState()),
       ],
       child: MaterialApp(
         title: 'Fwitter',

lib/model/user.dart

@@ -1,4 +1,7 @@
-class UserModel {
+import 'package:equatable/equatable.dart';
+
+// ignore: must_be_immutable
+class UserModel extends Equatable {
   String? key;
   String? email;
   String? userId;
@@ -152,4 +155,27 @@ class UserModel {
   String get getFollowing {
     return '${following ?? 0}';
   }
+
+  @override
+  List<Object?> get props => [
+        key,
+        email,
+        userId,
+        displayName,
+        userName,
+        webSite,
+        profilePic,
+        bannerImage,
+        contact,
+        bio,
+        location,
+        dob,
+        createdAt,
+        isVerified,
+        followers,
+        following,
+        fcmToken,
+        followersList,
+        followingList
+      ];
 }

lib/state/appState.dart

@@ -3,9 +3,11 @@ import 'package:flutter/material.dart';
 class AppState extends ChangeNotifier {
   bool _isBusy = false;
   bool get isbusy => _isBusy;
-  set loading(bool value) {
-    _isBusy = value;
-    notifyListeners();
+  set isBusy(bool value) {
+    if (value != _isBusy) {
+      _isBusy = value;
+      notifyListeners();
+    }
   }
 
   int _pageIndex = 0;

lib/state/authState.dart

@@ -75,19 +75,29 @@ class AuthState extends AppState {
   Future<String?> signIn(String email, String password,
       {required GlobalKey<ScaffoldState> scaffoldKey}) async {
     try {
-      loading = true;
+      isBusy = true;
       var result = await _firebaseAuth.signInWithEmailAndPassword(
           email: email, password: password);
       user = result.user;
       userId = user!.uid;
       return user!.uid;
-    } catch (error) {
-      loading = false;
+    } on FirebaseException catch (error) {
+      if (error.code == 'firebase_auth/user-not-found') {
+        Utility.customSnackBar(scaffoldKey, 'User not found');
+      } else {
+        Utility.customSnackBar(
+          scaffoldKey,
+          error.message ?? 'Somethimg went wrong',
+        );
+      }
       cprint(error, errorIn: 'signIn');
-      kAnalytics.logLogin(loginMethod: 'email_login');
+    } catch (error) {
       Utility.customSnackBar(scaffoldKey, error.toString());
-      // logoutCallback();
+      cprint(error, errorIn: 'signIn');
+
       return null;
+    } finally {
+      isBusy = false;
     }
   }
 
@@ -164,7 +174,7 @@ class AuthState extends AppState {
       {required GlobalKey<ScaffoldState> scaffoldKey,
       required String password}) async {
     try {
-      loading = true;
+      isBusy = true;
       var result = await _firebaseAuth.createUserWithEmailAndPassword(
         email: userModel.email!,
         password: password,
@@ -183,7 +193,7 @@ class AuthState extends AppState {
       createUser(_userModel!, newUser: true);
       return user!.uid;
     } catch (error) {
-      loading = false;
+      isBusy = false;
       cprint(error, errorIn: 'signUp');
       Utility.customSnackBar(scaffoldKey, error.toString());
       return null;
@@ -206,26 +216,26 @@ class AuthState extends AppState {
 
     kDatabase.child('profile').child(user.userId!).set(user.toJson());
     _userModel = user;
-    loading = false;
+    isBusy = false;
   }
 
   /// Fetch current user profile
   Future<User?> getCurrentUser() async {
     try {
-      loading = true;
+      isBusy = true;
       Utility.logEvent('get_currentUSer', parameter: {});
       user = _firebaseAuth.currentUser;
       if (user != null) {
+        await getProfileUser();
         authStatus = AuthStatus.LOGGED_IN;
         userId = user!.uid;
-        getProfileUser();
       } else {
         authStatus = AuthStatus.NOT_LOGGED_IN;
       }
-      loading = false;
+      isBusy = false;
       return user;
     } catch (error) {
-      loading = false;
+      isBusy = false;
       cprint(error, errorIn: 'getCurrentUser');
       authStatus = AuthStatus.NOT_LOGGED_IN;
       return null;
@@ -360,8 +370,6 @@ class AuthState extends AppState {
   /// If `userProfileId` is null then logged in user's profile will fetched
   FutureOr<void> getProfileUser({String? userProfileId}) {
     try {
-      loading = true;
-
       userProfileId = userProfileId ?? user!.uid;
       kDatabase
           .child("profile")
@@ -377,7 +385,7 @@ class AuthState extends AppState {
               _userModel!.isVerified = user!.emailVerified;
               if (!user!.emailVerified) {
                 // Check if logged in user verified his email address or not
-                reloadUser();
+                // reloadUser();
               }
               if (_userModel!.fcmToken == null) {
                 updateFCMToken();
@@ -389,10 +397,10 @@ class AuthState extends AppState {
             Utility.logEvent('get_profile', parameter: {});
           }
         }
-        loading = false;
+        isBusy = false;
       });
     } catch (error) {
-      loading = false;
+      isBusy = false;
       cprint(error, errorIn: 'getProfileUser');
     }
   }

lib/state/bookmarkState.dart

@@ -34,7 +34,7 @@ class BookmarkState extends AppState {
       if (_tweetList != null) {
         return;
       }
-      loading = true;
+      isBusy = true;
       kDatabase
           .child('bookmark')
           .child(userId)
@@ -62,10 +62,10 @@ class BookmarkState extends AppState {
             }
           }
         }
-        loading = false;
+        isBusy = false;
       });
     } catch (error) {
-      loading = false;
+      isBusy = false;
       cprint(error, errorIn: 'getDataFromDatabase');
     }
   }

lib/state/chats/suggestionUserState.dart

@@ -0,0 +1,123 @@
+import 'package:flutter_twitter_clone/helper/utility.dart';
+import 'package:flutter_twitter_clone/model/user.dart';
+import 'package:flutter_twitter_clone/state/appState.dart';
+
+class SuggestionsState extends AppState {
+  List<UserModel>? _userlist;
+
+  UserModel? currentUser;
+  void initUser(UserModel? model) {
+    if (model != null && currentUser != model) {
+      currentUser = model;
+      _displaySuggestions = int.tryParse(currentUser!.getFollowing)! < 5;
+    }
+  }
+
+  bool _displaySuggestions = false;
+  bool get displaySuggestions => _displaySuggestions;
+  set displaySuggestions(bool value) {
+    if (value != _displaySuggestions) {
+      _displaySuggestions = value;
+      notifyListeners();
+    }
+  }
+
+  List<UserModel>? get userlist => _userlist;
+  void setUserlist(List<UserModel>? list) {
+    if (list != null && _userlist == null) {
+      list.sort((a, b) {
+        if (a.followersList != null && b.followersList != null) {
+          return b.followersList!.length.compareTo(a.followersList!.length);
+        } else if (a.followersList != null) {
+          return 0;
+        }
+        return 1;
+      });
+
+      _userlist = list.take(20).toList();
+      _userlist!.removeWhere((element) => isFollowing(element));
+      _selectedusers = List.from(_userlist!);
+    }
+  }
+
+  /// Check if user followerlist contain your or not
+  /// If your id exist in follower list it mean you are following him
+  bool isFollowing(UserModel user) {
+    if (user.followersList != null &&
+        user.followersList!.any((x) => x == currentUser!.userId)) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  List<UserModel> _selectedusers = [];
+  int get selectedusersCount => _selectedusers.length;
+
+  bool isSelected(UserModel user) {
+    return _selectedusers.contains(user);
+  }
+
+  void toggleAllSelections() {
+    if (_selectedusers.length == _userlist!.length) {
+      _selectedusers = [];
+    } else {
+      _selectedusers = List.from(_userlist!);
+    }
+    notifyListeners();
+  }
+
+  void toggleUserSelection(UserModel user) {
+    if (isSelected(user)) {
+      _selectedusers.remove(user);
+    } else {
+      _selectedusers.add(user);
+    }
+
+    notifyListeners();
+  }
+
+  /// get [UserModel list] from firebase realtime Database
+  void getDataFromDatabase() {
+    try {} catch (error) {
+      isBusy = false;
+      cprint(error, errorIn: 'getDataFromDatabase');
+    }
+  }
+
+  Future<void> followUsers() async {
+    try {
+      if (_selectedusers.length > 0) {
+        /// Add current user id to the following list of all selected users
+        for (final user in _selectedusers) {
+          user.followersList ??= [];
+          user.followersList!.add(currentUser!.userId!);
+          user.followers = user.followersList!.length;
+          kDatabase
+              .child('profile')
+              .child(user.userId!)
+              .child('followerList')
+              .set(user.followersList);
+
+          cprint('user added to following list');
+        }
+
+        /// Add all selected users to current user following list
+        currentUser!.followingList ??= [];
+        currentUser!.followingList!
+            .addAll(_selectedusers.map((e) => e.userId!));
+        currentUser!.following = currentUser!.followingList!.length;
+        kDatabase
+            .child('profile')
+            .child(currentUser!.userId!)
+            .child('followingList')
+            .set(currentUser!.followingList);
+
+        displaySuggestions = false;
+      }
+    } catch (error) {
+      isBusy = false;
+      cprint(error, errorIn: 'followUsers');
+    }
+  }
+}

lib/state/notificationState.dart

@@ -61,7 +61,7 @@ class NotificationState extends AppState {
       if (_notificationList != null) {
         return;
       }
-      loading = true;
+      isBusy = true;
       kDatabase
           .child('notification')
           .child(userId)
@@ -80,10 +80,10 @@ class NotificationState extends AppState {
                 .sort((x, y) => y.timeStamp!.compareTo(x.timeStamp!));
           }
         }
-        loading = false;
+        isBusy = false;
       });
     } catch (error) {
-      loading = false;
+      isBusy = false;
       cprint(error, errorIn: 'getDataFromDatabase');
     }
   }

lib/state/searchState.dart

@@ -38,6 +38,7 @@ class SearchState extends AppState {
               });
               _userFilterlist!
                   .sort((x, y) => y.followers!.compareTo(x.followers!));
+              notifyListeners();
             }
           } else {
             _userlist = null;

lib/ui/page/Auth/verifyEmail.dart

@@ -27,7 +27,7 @@ class _VerifyEmailPageState extends State<VerifyEmailPage> {
         crossAxisAlignment: CrossAxisAlignment.center,
         children: state.user!.emailVerified
             ? <Widget>[
-                const NotifyText(
+                NotifyText(
                   title: 'Your email address is verified',
                   subTitle:
                       'You have got your blue tick on your name. Cheers !!',