Simplify use of like widget

lib/models/comment.dart

@@ -1,3 +1,4 @@
+import 'package:comunic/enums/likes_type.dart';
 import 'package:comunic/models/like_element.dart';
 import 'package:meta/meta.dart';
 import 'package:comunic/utils/account_utils.dart' as account;
@@ -40,4 +41,7 @@ class Comment implements LikeElement {
   bool get hasImage => imageURL != null;
 
   bool get isOwner => userID == account.userID();
+
+  @override
+  LikesType get likeType => LikesType.COMMENT;
 }

lib/models/like_element.dart

@@ -1,11 +1,14 @@
+import 'package:comunic/enums/likes_type.dart';
+
 /// Element that can be liked by the user
 ///
 /// @author Pierre HUBERT
 
 abstract class LikeElement {
+  LikesType get likeType;
 
   int get id;
+
   bool userLike;
   int likes;
-
-}
+}

lib/models/post.dart

@@ -1,3 +1,4 @@
+import 'package:comunic/enums/likes_type.dart';
 import 'package:comunic/enums/post_kind.dart';
 import 'package:comunic/enums/post_visibility_level.dart';
 import 'package:comunic/enums/user_access_levels.dart';
@@ -83,4 +84,7 @@ class Post implements LikeElement {
   bool get canDelete =>
       access == UserAccessLevels.FULL ||
       access == UserAccessLevels.INTERMEDIATE;
+
+  @override
+  LikesType get likeType => LikesType.POST;
 }

lib/ui/tiles/comment_tile.dart

@@ -1,4 +1,3 @@
-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';
@@ -100,15 +99,7 @@ class CommentTile extends StatelessWidget {
         ),
 
         // Comment likes
-        LikeWidget(
-            likeType: LikesType.COMMENT,
-            likeID: comment.id,
-            likesCount: comment.likes,
-            isLiking: comment.userLike,
-            onUpdatedLikings: (count, isLiking) {
-              comment.likes = count;
-              comment.userLike = isLiking;
-            }),
+        LikeWidget(likeElement: comment),
       ],
     );
   }

lib/ui/tiles/post_tile.dart

@@ -1,10 +1,8 @@
 import 'dart:io';
 
-import 'package:comunic/enums/likes_type.dart';
 import 'package:comunic/enums/post_kind.dart';
 import 'package:comunic/enums/post_visibility_level.dart';
 import 'package:comunic/helpers/comments_helper.dart';
-import 'package:comunic/helpers/likes_helper.dart';
 import 'package:comunic/helpers/posts_helper.dart';
 import 'package:comunic/lists/groups_list.dart';
 import 'package:comunic/lists/users_list.dart';
@@ -211,15 +209,8 @@ class _PostTileState extends State<PostTile> {
         children: <Widget>[
           // Like button
           Center(
-              child: LikeWidget(
-                  likeType: LikesType.POST,
-                  likeID: widget.post.id,
-                  likesCount: widget.post.likes,
-                  isLiking: widget.post.userLike,
-                  onUpdatedLikings: (num, userLike) {
-                    widget.post.likes = num;
-                    widget.post.userLike = userLike;
-                  })),
+            child: LikeWidget(likeElement: widget.post),
+          ),
         ],
       ),
     );

lib/ui/widgets/like_widget.dart

@@ -1,5 +1,5 @@
-import 'package:comunic/enums/likes_type.dart';
 import 'package:comunic/helpers/likes_helper.dart';
+import 'package:comunic/models/like_element.dart';
 import 'package:comunic/ui/widgets/safe_state.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:flutter/material.dart';
@@ -14,24 +14,12 @@ import 'package:flutter/material.dart';
 typedef UpdatedLikingCallBack = Function(int, bool);
 
 class LikeWidget extends StatefulWidget {
-  final LikesType likeType;
-  final int likeID;
-  int likesCount;
-  bool isLiking;
-  final UpdatedLikingCallBack onUpdatedLikings;
+  final LikeElement likeElement;
 
-  LikeWidget({
+  const 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),
+    @required this.likeElement,
+  })  : assert(likeElement != null),
         super(key: key);
 
   @override
@@ -39,8 +27,10 @@ class LikeWidget extends StatefulWidget {
 }
 
 class _LikeWidgetState extends SafeState<LikeWidget> {
+  LikeElement get elem => widget.likeElement;
+
   String get _likeString {
-    switch (widget.likesCount) {
+    switch (elem.likes) {
       case 0:
         return tr("Like");
 
@@ -48,7 +38,7 @@ class _LikeWidgetState extends SafeState<LikeWidget> {
         return tr("1 Like");
 
       default:
-        return tr("%num% likes", args: {"num": widget.likesCount.toString()});
+        return tr("%num% likes", args: {"num": elem.likes.toString()});
     }
   }
 
@@ -62,7 +52,7 @@ class _LikeWidgetState extends SafeState<LikeWidget> {
             children: <Widget>[
               Icon(
                 Icons.thumb_up,
-                color: widget.isLiking ? Colors.blue : null,
+                color: elem.userLike ? Colors.blue : null,
                 size: 15.0,
               ),
               SizedBox(
@@ -79,14 +69,12 @@ class _LikeWidgetState extends SafeState<LikeWidget> {
   /// 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)) {
+    if (await LikesHelper()
+        .setLiking(type: elem.likeType, like: !elem.userLike, id: elem.id)) {
       setState(() {
-        widget.isLiking = !widget.isLiking;
+        elem.userLike = !elem.userLike;
 
-        widget.likesCount += widget.isLiking ? 1 : -1;
-
-        widget.onUpdatedLikings(widget.likesCount, widget.isLiking);
+        elem.likes += elem.userLike ? 1 : -1;
       });
     }
   }