feat: add android notification screen

lib/android/android.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:git_flux/utils/utils.dart';
 import 'news.dart';
+import 'notifications.dart';
 
 class AndroidHome extends StatefulWidget {
   @override
@@ -15,6 +16,8 @@ class _AndroidHomeState extends State<AndroidHome> {
     switch (active) {
       case 0:
         return NewsScreen();
+      case 1:
+        return NotificationScreen();
       default:
         return Text('d');
     }

lib/android/news.dart

@@ -19,7 +19,15 @@ class NewsScreenState extends State<NewsScreen> {
     return Scaffold(
       appBar: AppBar(title: Text('News')),
       body: RefreshIndicator(
-        onRefresh: refresh,
+        onRefresh: () async {
+          await refresh();
+          // Scaffold.of(context).showSnackBar(SnackBar(
+          //   content: Container(
+          //     child: Text('data'),
+          //     padding: EdgeInsets.only(bottom: 10),
+          //   )
+          // ));
+        },
         child: ListView.builder(
           controller: controller,
           itemCount: events.length + 1,

lib/android/notifications.dart

@@ -1 +1,96 @@
-import 'package:flutter/material.dart';
+import 'dart:core';
+import 'package:flutter/material.dart' hide Notification;
+import 'package:flutter/cupertino.dart' hide Notification;
+import 'package:git_flux/providers/notification.dart';
+import 'package:git_flux/widgets/notification_item.dart';
+import 'package:git_flux/utils/utils.dart';
+
+class NotificationGroup {
+  String fullName;
+  List<Notification> items = [];
+
+  NotificationGroup(this.fullName);
+}
+
+class NotificationScreen extends StatefulWidget {
+  @override
+  NotificationScreenState createState() => NotificationScreenState();
+}
+
+class NotificationScreenState extends State<NotificationScreen> {
+  int active = 0;
+  bool loading = false;
+  List<NotificationGroup> groups = [];
+
+  @override
+  void initState() {
+    super.initState();
+    Future.delayed(Duration(seconds: 0)).then((_) {
+      _onSwitchTab(context, 0);
+    });
+  }
+
+  Widget _buildGroupItem(BuildContext context, int index) {
+    var group = groups[index];
+
+    return Container(
+      // padding: EdgeInsets.all(10),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.stretch,
+        children: <Widget>[
+          Container(
+            padding: EdgeInsets.only(top: 10, left: 4, bottom: 4),
+            color: CupertinoColors.extraLightBackgroundGray,
+            child: Text(
+              group.fullName,
+              style: TextStyle(color: CupertinoColors.black),
+            ),
+          ),
+          Column(
+              children: group.items
+                  .map((item) => NotificationItem(item: item))
+                  .toList())
+        ],
+      ),
+    );
+  }
+
+  void _onSwitchTab(BuildContext context, int index) async {
+    setState(() {
+      active = index;
+      loading = true;
+    });
+
+    var ns = await ghClient.activity
+        .listNotifications(all: index == 2, participating: index == 1)
+        .toList();
+
+    NotificationProvider.of(context).countUpdate.add(ns.length);
+
+    Map<String, NotificationGroup> groupMap = {};
+    ns.forEach((item) {
+      String repo = item.repository.fullName;
+      if (groupMap[repo] == null) {
+        groupMap[repo] = NotificationGroup(repo);
+      }
+
+      groupMap[repo].items.add(item);
+    });
+
+    setState(() {
+      groups = groupMap.values.toList();
+      loading = false;
+    });
+  }
+
+  @override
+  Widget build(context) {
+    return Scaffold(
+      appBar: AppBar(title: Text('Notification')),
+      body: ListView.builder(
+        itemCount: groups.length,
+        itemBuilder: _buildGroupItem,
+      ),
+    );
+  }
+}