Create like widget

lib/ui/tiles/comment_tile.dart

@@ -1,6 +1,8 @@
+import 'package:comunic/enums/likes_type.dart';
 import 'package:comunic/models/comment.dart';
 import 'package:comunic/models/user.dart';
 import 'package:comunic/ui/widgets/account_image_widget.dart';
+import 'package:comunic/ui/widgets/like_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';
@@ -16,7 +18,6 @@ enum _CommentAction { DELETE, UPDATE }
 class CommentTile extends StatelessWidget {
   final Comment comment;
   final User user;
-  final void Function(Comment) onUpdateLike;
   final void Function(Comment) onUpdateComment;
   final void Function(Comment) onDeleteComment;
 
@@ -24,12 +25,10 @@ class CommentTile extends StatelessWidget {
     Key key,
     @required this.comment,
     @required this.user,
-    @required this.onUpdateLike,
     @required this.onUpdateComment,
     @required this.onDeleteComment,
   })  : assert(comment != null),
         assert(user != null),
-        assert(onUpdateLike != null),
         assert(onUpdateComment != null),
         assert(onDeleteComment != null),
         super(key: key);
@@ -42,7 +41,10 @@ class CommentTile extends StatelessWidget {
         user.displayName,
       ),
       subtitle: _buildCommentContent(),
-      trailing: Text(diffTimeFromNowToStr(comment.timeSent), style: TextStyle(fontSize: 10.0),),
+      trailing: Text(
+        diffTimeFromNowToStr(comment.timeSent),
+        style: TextStyle(fontSize: 10.0),
+      ),
     );
   }
 
@@ -91,55 +93,26 @@ class CommentTile extends StatelessWidget {
           child: comment.hasContent
               ? Text(
                   comment.content,
-                  style: TextStyle(color: darkTheme() ? darkAccentColor : Colors.black),
+                  style: TextStyle(
+                      color: darkTheme() ? darkAccentColor : Colors.black),
                 )
               : null,
         ),
 
         // Comment likes
-        _buildLikeButton(),
+        LikeWidget(
+            likeType: LikesType.COMMENT,
+            likeID: comment.id,
+            likesCount: comment.likes,
+            isLiking: comment.userLike,
+            onUpdatedLikings: (count, isLiking) {
+              comment.likes = count;
+              comment.userLike = isLiking;
+            }),
       ],
     );
   }
 
-  String get _likeString {
-    if (comment.likes == 0) return tr("Like");
-    if (comment.likes == 1)
-      return tr("1 Like");
-    else
-      return tr("%num% likes", args: {"num": comment.likes.toString()});
-  }
-
-  /// Build like button associated to this post
-  Widget _buildLikeButton() {
-    return Padding(
-      padding: const EdgeInsets.only(top: 4.0, bottom: 4.0),
-      child: Align(
-        alignment: AlignmentDirectional.topStart,
-        child: Column(
-          children: <Widget>[
-            InkWell(
-              onTap: () => onUpdateLike(comment),
-              child: Row(
-                children: <Widget>[
-                  Icon(
-                    Icons.thumb_up,
-                    color: comment.userLike ? Colors.blue : null,
-                    size: 15.0,
-                  ),
-                  SizedBox(
-                    width: 8.0,
-                  ),
-                  Text(_likeString),
-                ],
-              ),
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
   /// A menu option has been selected
   void _selectedMenuOption(_CommentAction value) {
     switch (value) {

lib/ui/tiles/post_tile.dart

@@ -362,7 +362,6 @@ class _PostTileState extends State<PostTile> {
       (num) => CommentTile(
         comment: widget.post.comments[num],
         user: widget.usersInfo.getUser(widget.post.comments[num].userID),
-        onUpdateLike: _updateCommentLike,
         onUpdateComment: _updateCommentContent,
         onDeleteComment: _deleteComment,
       ),
@@ -525,11 +524,6 @@ class _PostTileState extends State<PostTile> {
     _updateElementLike(LikesType.POST, widget.post);
   }
 
-  /// Invert comment like status
-  Future<void> _updateCommentLike(Comment comment) async {
-    _updateElementLike(LikesType.COMMENT, comment);
-  }
-
   /// Invert element like status
   Future<void> _updateElementLike(LikesType type, LikeElement element) async {
     // Update liking status

lib/ui/widgets/like_widget.dart

@@ -0,0 +1,98 @@
+import 'package:comunic/enums/likes_type.dart';
+import 'package:comunic/helpers/likes_helper.dart';
+import 'package:comunic/ui/widgets/safe_state.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Like widget
+///
+/// @author Pierre Hubert
+
+/// Updated linking callback
+/// int : new number of likes
+/// bool : new user liking status
+typedef UpdatedLikingCallBack = Function(int, bool);
+
+class LikeWidget extends StatefulWidget {
+  final LikesType likeType;
+  final int likeID;
+  int likesCount;
+  bool isLiking;
+  final UpdatedLikingCallBack onUpdatedLikings;
+
+  LikeWidget({
+    Key key,
+    @required this.likeType,
+    @required this.likeID,
+    @required this.likesCount,
+    @required this.isLiking,
+    @required this.onUpdatedLikings,
+  })  : assert(likeType != null),
+        assert(likeID != null),
+        assert(likesCount != null),
+        assert(isLiking != null),
+        assert(onUpdatedLikings != null),
+        super(key: key);
+
+  @override
+  _LikeWidgetState createState() => _LikeWidgetState();
+}
+
+class _LikeWidgetState extends SafeState<LikeWidget> {
+  String get _likeString {
+    switch (widget.likesCount) {
+      case 0:
+        return tr("Like");
+
+      case 1:
+        return tr("1 Like");
+
+      default:
+        return tr("%num% likes", args: {"num": widget.likesCount.toString()});
+    }
+  }
+
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.only(top: 4.0, bottom: 4.0),
+      child: Align(
+        alignment: AlignmentDirectional.topStart,
+        child: Column(
+          children: <Widget>[
+            InkWell(
+              onTap: () => _toggleLike(),
+              child: Row(
+                children: <Widget>[
+                  Icon(
+                    Icons.thumb_up,
+                    color: widget.isLiking ? Colors.blue : null,
+                    size: 15.0,
+                  ),
+                  SizedBox(
+                    width: 8.0,
+                  ),
+                  Text(_likeString),
+                ],
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  /// Toggle like status
+  void _toggleLike() async {
+    // As like are not really important, we ignore failures
+    if (await LikesHelper().setLiking(
+        type: widget.likeType, like: !widget.isLiking, id: widget.likeID)) {
+      setState(() {
+        widget.isLiking = !widget.isLiking;
+
+        widget.likesCount += widget.isLiking ? 1 : -1;
+
+        widget.onUpdatedLikings(widget.likesCount, widget.isLiking);
+      });
+    }
+  }
+}