From 9290617cd54a046d10cf5fc9ed7ce1c7dea4acf6 Mon Sep 17 00:00:00 2001
From: Pierre HUBERT <pierre.git@communiquons.org>
Date: Sat, 18 May 2019 15:54:10 +0200
Subject: [PATCH] Can update like status

---
 lib/models/comment.dart        |  4 +--
 lib/ui/tiles/comment_tile.dart | 57 +++++++++++++++++++++++++++++++---
 lib/ui/tiles/post_tile.dart    | 18 +++++++++++
 3 files changed, 73 insertions(+), 6 deletions(-)

diff --git a/lib/models/comment.dart b/lib/models/comment.dart
index acfd733..f44dc33 100644
--- a/lib/models/comment.dart
+++ b/lib/models/comment.dart
@@ -13,8 +13,8 @@ class Comment {
   final int timeSent;
   final String content;
   final String imageURL;
-  final int likes;
-  final bool userLike;
+  int likes;
+  bool userLike;
 
   Comment({
     @required this.id,
diff --git a/lib/ui/tiles/comment_tile.dart b/lib/ui/tiles/comment_tile.dart
index 42f6511..a5770f3 100644
--- a/lib/ui/tiles/comment_tile.dart
+++ b/lib/ui/tiles/comment_tile.dart
@@ -2,6 +2,7 @@ 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/network_image_widget.dart';
+import 'package:comunic/utils/intl_utils.dart';
 import 'package:flutter/material.dart';
 
 /// Single comment tile
@@ -11,10 +12,16 @@ import 'package:flutter/material.dart';
 class CommentTile extends StatelessWidget {
   final Comment comment;
   final User user;
+  final void Function(Comment) onUpdateLike;
 
-  const CommentTile({Key key, this.comment, this.user})
-      : assert(comment != null),
+  const CommentTile({
+    Key key,
+    @required this.comment,
+    @required this.user,
+    @required this.onUpdateLike,
+  })  : assert(comment != null),
         assert(user != null),
+        assert(onUpdateLike != null),
         super(key: key);
 
   @override
@@ -23,7 +30,9 @@ class CommentTile extends StatelessWidget {
       leading: AccountImageWidget(
         user: user,
       ),
-      title: Text(user.displayName,),
+      title: Text(
+        user.displayName,
+      ),
       subtitle: _buildCommentContent(),
     );
   }
@@ -39,15 +48,55 @@ class CommentTile extends StatelessWidget {
                   url: comment.imageURL,
                   allowFullScreen: true,
                   height: 100.0,
+                  width: null,
                 )
               : null,
         ),
 
         // Comment text
         Container(
-          child: comment.hasContent ? Text(comment.content,) : null,
+          child: comment.hasContent
+              ? Text(
+                  comment.content,
+                )
+              : null,
         ),
+
+        // Comment likes
+        _buildLikeButton(),
       ],
     );
   }
+
+  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 Align(
+      alignment: AlignmentDirectional.topStart,
+      child: FlatButton(
+        padding: EdgeInsets.only(left: 0.0),
+        onPressed: () => 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),
+          ],
+        ),
+      ),
+    );
+  }
 }
diff --git a/lib/ui/tiles/post_tile.dart b/lib/ui/tiles/post_tile.dart
index 4a934ba..5b8b7ab 100644
--- a/lib/ui/tiles/post_tile.dart
+++ b/lib/ui/tiles/post_tile.dart
@@ -5,6 +5,7 @@ import 'package:comunic/enums/post_kind.dart';
 import 'package:comunic/helpers/comments_helper.dart';
 import 'package:comunic/helpers/likes_helper.dart';
 import 'package:comunic/lists/users_list.dart';
+import 'package:comunic/models/comment.dart';
 import 'package:comunic/models/new_comment.dart';
 import 'package:comunic/models/post.dart';
 import 'package:comunic/models/user.dart';
@@ -192,6 +193,7 @@ class _PostTileState extends State<PostTile> {
       (num) => CommentTile(
             comment: widget.post.comments[num],
             user: widget.usersInfo.getUser(widget.post.comments[num].userID),
+            onUpdateLike: _updateCommentLike,
           ),
     );
 
@@ -351,4 +353,20 @@ class _PostTileState extends State<PostTile> {
       widget.post.userLikes ? widget.post.likes++ : widget.post.likes--;
     });
   }
+
+  /// Invert comment like status
+  Future<void> _updateCommentLike(Comment comment) async {
+    // Update liking status
+    _likesHelper.setLiking(
+      type: LikesType.COMMENT,
+      like: !comment.userLike,
+      id: comment.id,
+    );
+
+    // Save new like status
+    setState(() {
+      comment.userLike = !comment.userLike;
+      comment.userLike ? comment.likes++ : comment.likes--;
+    });
+  }
 }