Create like widget

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);
+      });
+    }
+  }
+}