Can like a text

lib/ui/screens/newest_posts.dart

@@ -1,11 +1,5 @@
 import 'package:comunic/helpers/posts_helper.dart';
-import 'package:comunic/helpers/users_helper.dart';
-import 'package:comunic/lists/posts_list.dart';
-import 'package:comunic/lists/users_list.dart';
-import 'package:comunic/ui/screens/conversation_screen.dart';
-import 'package:comunic/ui/tiles/post_tile.dart';
-import 'package:comunic/utils/intl_utils.dart';
-import 'package:comunic/utils/ui_utils.dart';
+import 'package:comunic/ui/widgets/posts_list_widget.dart';
 import 'package:flutter/material.dart';
 
 /// Newest posts screen
@@ -20,57 +14,13 @@ class NewestPostsScreen extends StatefulWidget {
 class _NewestPostsScreenState extends State<NewestPostsScreen> {
   // Helpers
   final PostsHelper _postsHelper = PostsHelper();
-  final UsersHelper _usersHelper = UsersHelper();
 
-  // Class members
-  PostsList _list;
-  UsersList _users;
-  ErrorLevel _error = ErrorLevel.NONE;
 
-  set error(ErrorLevel err) => setState(() => _error = err);
-
-  @override
-  void didChangeDependencies() {
-    super.didChangeDependencies();
-    _loadPostsList();
-  }
-
-  void _loadError() =>
-      error = _list == null ? ErrorLevel.MAJOR : ErrorLevel.MINOR;
-
-  Future<void> _loadPostsList() async {
-    final list = await _postsHelper.getLatest();
-
-    if (list == null) return _loadError();
-
-    final users = await _usersHelper.getList(list.usersID);
-
-    if (users == null) return _loadError();
-
-    setState(() {
-      _list = list;
-      _users = users;
-    });
-  }
-
-  Widget _buildErrorCard() {
-    return buildErrorCard(tr("Could not get the list of posts !"));
-  }
-
-  Widget _buildListView() {
-    return ListView.builder(
-      itemCount: _list.length,
-      itemBuilder: (c, i) => PostTile(
-            post: _list[i],
-            usersInfo: _users,
-          ),
+ @override
+  Widget build(BuildContext context) {
+    return PostsListWidget(
+      getPostsList: _postsHelper.getLatest,
     );
   }
 
-  @override
-  Widget build(BuildContext context) {
-    if (_error == ErrorLevel.MAJOR) return _buildErrorCard();
-    if (_list == null) return buildCenteredProgressBar();
-    return _buildListView();
-  }
 }

lib/ui/tiles/post_tile.dart

@@ -5,6 +5,7 @@ import 'package:comunic/models/user.dart';
 import 'package:comunic/ui/widgets/account_image_widget.dart';
 import 'package:comunic/ui/widgets/network_image_widget.dart';
 import 'package:comunic/utils/date_utils.dart';
+import 'package:comunic/utils/intl_utils.dart';
 import 'package:flutter/material.dart';
 
 /// Single posts tile
@@ -20,13 +21,16 @@ const TextStyle _userNameStyle = TextStyle(
 class PostTile extends StatelessWidget {
   final Post post;
   final UsersList usersInfo;
+  final void Function(Post) onTapLike;
 
-  const PostTile({
-    Key key,
-    @required this.post,
-    @required this.usersInfo,
-  })  : assert(post != null),
+  const PostTile(
+      {Key key,
+      @required this.post,
+      @required this.usersInfo,
+      @required this.onTapLike})
+      : assert(post != null),
         assert(usersInfo != null),
+        assert(onTapLike != null),
         super(key: key);
 
   User get _user => usersInfo.getUser(post.userID);
@@ -83,6 +87,39 @@ class PostTile extends StatelessWidget {
     );
   }
 
+  Widget _buildButtonsArea() {
+    return Padding(
+      padding:
+          const EdgeInsets.only(top: 16.0, left: 8.0, right: 8.0, bottom: 16.0),
+      child: Column(
+        children: <Widget>[
+          // Like button
+          Center(
+            child: InkWell(
+              onTap: () => onTapLike(post),
+              child: Row(
+                crossAxisAlignment: CrossAxisAlignment.center,
+                mainAxisAlignment: MainAxisAlignment.center,
+                children: <Widget>[
+                  Padding(
+                    padding: const EdgeInsets.only(left: 8.0, right: 8.0),
+                    child: Icon(
+                      Icons.thumb_up,
+                      color: post.userLikes ? Colors.blue : null,
+                    ),
+                  ),
+                  Text(post.likes < 2
+                      ? tr("%num% like", args: {"num": post.likes.toString()})
+                      : tr("%num% likes", args: {"num": post.likes.toString()}))
+                ],
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     return Card(
@@ -95,6 +132,7 @@ class PostTile extends StatelessWidget {
           children: <Widget>[
             _buildHeaderRow(),
             _buildContentRow(),
+            _buildButtonsArea(),
           ],
         ),
       ),

lib/ui/widgets/posts_list_widget.dart

@@ -0,0 +1,107 @@
+import 'package:comunic/enums/likes_type.dart';
+import 'package:comunic/helpers/likes_helper.dart';
+import 'package:comunic/helpers/users_helper.dart';
+import 'package:comunic/lists/posts_list.dart';
+import 'package:comunic/lists/users_list.dart';
+import 'package:comunic/models/post.dart';
+import 'package:comunic/ui/screens/conversation_screen.dart';
+import 'package:comunic/ui/tiles/post_tile.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:comunic/utils/ui_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Posts list widget
+///
+/// Displays a list of posts
+///
+/// @author Pierre HUBERT
+
+class PostsListWidget extends StatefulWidget {
+  final Future<PostsList> Function() getPostsList;
+
+  const PostsListWidget({
+    Key key,
+    @required this.getPostsList,
+  })  : assert(getPostsList != null),
+        super(key: key);
+
+  @override
+  State<StatefulWidget> createState() => _PostsListWidgetState();
+}
+
+class _PostsListWidgetState extends State<PostsListWidget> {
+  // Helpers
+  final LikesHelper _likesHelper = LikesHelper();
+  final UsersHelper _usersHelper = UsersHelper();
+
+  // Class members
+  PostsList _list;
+  UsersList _users;
+
+  set error(ErrorLevel err) => setState(() => _error = err);
+
+  ErrorLevel _error = ErrorLevel.NONE;
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    _loadPostsList();
+  }
+
+  void _loadError() =>
+      error = _list == null ? ErrorLevel.MAJOR : ErrorLevel.MINOR;
+
+  /// Load the list of posts
+  Future<void> _loadPostsList() async {
+    final list = await widget.getPostsList();
+
+    if (list == null) return _loadError();
+
+    final users = await _usersHelper.getList(list.usersID);
+
+    if (users == null) return _loadError();
+
+    setState(() {
+      _list = list;
+      _users = users;
+    });
+  }
+
+  Widget _buildErrorCard() {
+    return buildErrorCard(tr("Could not get the list of posts !"));
+  }
+
+  Widget _buildListView() {
+    return ListView.builder(
+      itemCount: _list.length,
+      itemBuilder: (c, i) => PostTile(
+            post: _list[i],
+            usersInfo: _users,
+            onTapLike: _onUpdateLike,
+          ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (_error == ErrorLevel.MAJOR) return _buildErrorCard();
+    if (_list == null) return buildCenteredProgressBar();
+    return _buildListView();
+  }
+
+  /// Update like status
+  Future<void> _onUpdateLike(Post post) async {
+    // Update liking status
+    _likesHelper.setLiking(
+      type: LikesType.POST,
+      like: !post.userLikes,
+      id: post.id,
+    );
+
+    // Save new like status
+    setState(() {
+      post.userLikes = !post.userLikes;
+      post.userLikes ? post.likes++ : post.likes--;
+    });
+  }
+}