feat: extract provider, add android news screen

lib/utils/utils.dart

@@ -1,8 +1,70 @@
 import 'package:flutter/material.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/gestures.dart';
+import 'package:git_flux/screens/screens.dart';
 export 'github.dart';
 export 'octicons.dart';
 export 'timeago.dart';
 
+TextSpan createLinkSpan(BuildContext context, String text, Function handle) {
+  return TextSpan(
+    text: text,
+    style: TextStyle(color: Color(0xff0366d6)),
+    recognizer: TapGestureRecognizer()
+      ..onTap = () {
+        Navigator.of(context).push(
+          CupertinoPageRoute(
+            builder: (context) {
+              return handle();
+            },
+          ),
+        );
+      },
+  );
+}
+
+TextSpan createRepoLinkSpan(BuildContext context, String owner, String name) {
+  return createLinkSpan(context, '$owner/$name', () => RepoScreen(owner, name));
+}
+
+List<BottomNavigationBarItem> buildNavigationItems() => [
+      BottomNavigationBarItem(
+        icon: Icon(Icons.rss_feed),
+        title: Text('News'),
+      ),
+      BottomNavigationBarItem(
+        icon: StreamBuilder<int>(builder: (context, snapshot) {
+          int count = snapshot.data;
+          print(count);
+
+          // https://stackoverflow.com/a/45434404
+          if (count != null && count > 0) {
+            return Stack(children: <Widget>[
+              Icon(Icons.notifications),
+              Positioned(
+                // draw a red marble
+                top: 0,
+                right: 0,
+                child: Icon(Icons.brightness_1,
+                    size: 8.0, color: Colors.redAccent),
+              )
+            ]);
+          } else {
+            return Icon(Icons.notifications);
+          }
+        }),
+        title: Text('Notification'),
+      ),
+      BottomNavigationBarItem(
+        icon: Icon(Icons.search),
+        title: Text('Search'),
+      ),
+      BottomNavigationBarItem(
+        icon: Icon(Icons.person),
+        title: Text('Me'),
+      ),
+    ];
+
 class Palette {
   static const green = 0xff2cbe4e;
   static const purple = 0xff6f42c1;