feat: open image view on avatar tap

lib/widgets/avatar.dart

@@ -1,4 +1,7 @@
 import 'package:flutter/material.dart';
+import 'package:git_touch/models/theme.dart';
+import 'package:git_touch/widgets/image_view.dart';
+import 'package:provider/provider.dart';
 
 class Avatar extends StatelessWidget {
   final String url;
@@ -21,16 +24,22 @@ class Avatar extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return ClipRRect(
-      borderRadius: BorderRadius.circular(4),
-      child: FadeInImage.assetNetwork(
-        placeholder: 'images/octoface.png',
-        image: url,
-        width: size,
-        height: size,
-        fadeInDuration: Duration(milliseconds: 200),
-        fadeOutDuration: Duration(milliseconds: 100),
+    return GestureDetector(
+      child: ClipRRect(
+        borderRadius: BorderRadius.circular(4),
+        child: FadeInImage.assetNetwork(
+          placeholder: 'images/octoface.png',
+          image: url,
+          width: size,
+          height: size,
+          fadeInDuration: Duration(milliseconds: 200),
+          fadeOutDuration: Duration(milliseconds: 100),
+        ),
       ),
+      onTap: () {
+        Provider.of<ThemeModel>(context)
+            .pushRoute(context, (_) => ImageView(url), fullscreenDialog: true);
+      },
     );
   }
 }

lib/widgets/image_view.dart

@@ -0,0 +1,20 @@
+import 'package:flutter/material.dart';
+import 'package:git_touch/scaffolds/common.dart';
+import 'package:photo_view/photo_view.dart';
+
+class ImageView extends StatelessWidget {
+  final String url;
+
+  ImageView(this.url);
+
+  @override
+  Widget build(BuildContext context) {
+    return CommonScaffold(
+      title: Text('Image'),
+      body: PhotoView(
+        imageProvider: NetworkImage(url),
+        backgroundDecoration: BoxDecoration(color: Colors.white),
+      ),
+    );
+  }
+}

pubspec.yaml

@@ -36,6 +36,7 @@ dependencies:
   tuple: ^1.0.2
   uri: ^0.11.3
   fimber: ^0.3.2
+  photo_view: ^0.7.0
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.