improvement: add avatar link url

lib/screens/gitlab_issue.dart

@@ -56,7 +56,10 @@ class GitlabIssueScreen extends StatelessWidget {
                   Text(issue.title),
                   Row(
                     children: <Widget>[
-                      Avatar(url: issue.author.avatarUrl),
+                      Avatar(
+                        url: issue.author.avatarUrl,
+                        linkUrl: '/user/${issue.author}',
+                      ),
                       Expanded(
                         child: Text(issue.description),
                       ),

lib/widgets/avatar.dart

@@ -12,12 +12,13 @@ class AvatarSize {
 class Avatar extends StatelessWidget {
   final String url;
   final double size;
+  final String linkUrl;
 
-  Avatar.large({
+  Avatar({
     @required this.url,
-  }) : size = 48;
-
-  Avatar({this.url, this.size = AvatarSize.medium});
+    this.size = AvatarSize.medium,
+    this.linkUrl,
+  });
 
   @override
   Widget build(BuildContext context) {
@@ -34,9 +35,43 @@ class Avatar extends StatelessWidget {
         ),
       ),
       onTap: () {
-        // Provider.of<ThemeModel>(context).push(
-        //     context, '/$login');
+        if (linkUrl != null)
+          Provider.of<ThemeModel>(context).push(context, linkUrl);
       },
     );
   }
 }
+
+class GithubAvatar extends StatelessWidget {
+  final String url;
+  final double size;
+  final String login;
+
+  GithubAvatar({
+    @required this.url,
+    this.size = AvatarSize.medium,
+    this.login,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Avatar(url: url, size: size, linkUrl: '/$login');
+  }
+}
+
+class GitlabAvatar extends StatelessWidget {
+  final String url;
+  final double size;
+  final String login;
+
+  GitlabAvatar({
+    @required this.url,
+    this.size = AvatarSize.medium,
+    this.login,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Avatar(url: url, size: size, linkUrl: '/$login');
+  }
+}

lib/widgets/comment_item.dart

@@ -45,9 +45,9 @@ class CommentItem extends StatelessWidget {
       crossAxisAlignment: CrossAxisAlignment.start,
       children: <Widget>[
         Row(children: <Widget>[
-          Link(
-            url: '/' + payload['author']['login'],
-            child: Avatar(url: payload['author']['avatarUrl']),
+          Avatar(
+            url: payload['author']['avatarUrl'],
+            linkUrl: '/' + payload['author']['login'],
           ),
           SizedBox(width: 8),
           Expanded(

lib/widgets/event_item.dart

@@ -52,10 +52,7 @@ class EventItem extends StatelessWidget {
           Row(
             crossAxisAlignment: CrossAxisAlignment.start,
             children: <Widget>[
-              Link(
-                url: '/' + e.actor.login,
-                child: Avatar(url: e.actor.avatarUrl),
-              ),
+              Avatar(url: e.actor.avatarUrl, linkUrl: '/' + e.actor.login),
               SizedBox(width: 10),
               Expanded(
                 child: Column(

lib/widgets/repository_item.dart

@@ -148,7 +148,7 @@ class RepositoryItem extends StatelessWidget {
       child: Row(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: <Widget>[
-          Avatar(url: avatarUrl, size: AvatarSize.small),
+          Avatar(url: avatarUrl, size: AvatarSize.small, linkUrl: '/$owner'),
           SizedBox(width: 8),
           Expanded(
             child: Column(

lib/widgets/user_item.dart

@@ -88,10 +88,7 @@ class UserItem extends StatelessWidget {
     if (inUserScreen) {
       return widget;
     } else {
-      return Link(
-        url: '/$login',
-        child: widget,
-      );
+      return Link(url: '/$login', child: widget);
     }
   }
 }