persistent draggable favorites manager

lib/route_generator.dart

@@ -1,4 +1,5 @@
 import 'package:capstone_hungry_hippos/screens/chat.dart';
+import 'package:capstone_hungry_hippos/screens/favorites_reorder.dart';
 import 'package:capstone_hungry_hippos/screens/schedule.dart';
 import 'package:capstone_hungry_hippos/screens/standing.dart';
 import 'package:flutter/material.dart';
@@ -6,10 +7,11 @@ import 'package:capstone_hungry_hippos/screens/home_widget.dart';
 import 'package:capstone_hungry_hippos/screens/sport.dart';
 
 class RouteGenerator {
-  static Route<dynamic> generateRoute(RouteSettings settings){
-    final args = settings.arguments; //This is how we pass arguments and can be used in case
+  static Route<dynamic> generateRoute(RouteSettings settings) {
+    final args = settings
+        .arguments; //This is how we pass arguments and can be used in case
 
-    switch (settings.name){
+    switch (settings.name) {
       case '/':
         return MaterialPageRoute(builder: (_) => Home());
       case '/Sport':
@@ -21,13 +23,15 @@ class RouteGenerator {
         return MaterialPageRoute(builder: (_) => Standing());
       case '/Chat':
         return MaterialPageRoute(builder: (_) => Chat());
+      case '/Favorites':
+        return MaterialPageRoute(builder: (_) => FavoritesManager());
       default:
         return _errorRoute();
     }
   }
 
   static Route _errorRoute() {
-    return MaterialPageRoute(builder: (_){
+    return MaterialPageRoute(builder: (_) {
       return Scaffold(
         appBar: AppBar(
           title: Text("Error Page"),

lib/screens/favorites_reorder.dart

@@ -0,0 +1,82 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class Favorites {
+  Future<SharedPreferences> _prefs = SharedPreferences.getInstance();
+
+  static const List<String> DEFAULT_FAVORITES = [
+    'Football',
+    'Basketball',
+    'Baseball',
+    'Soccer',
+    'Tennis',
+    'Volleyball'
+  ];
+
+  Future<List<String>> get_favorites() async {
+    final prefs = await _prefs;
+    return prefs.getStringList('favorites') ?? DEFAULT_FAVORITES;
+  }
+
+  Future<bool> set_favorites(final List<String> favorites) async {
+    final prefs = await _prefs;
+    return await prefs.setStringList('favorites', favorites);
+  }
+}
+
+class FavoritesManager extends StatefulWidget {
+  FavoritesManager({Key key}) : super(key: key);
+
+  @override
+  _FavoritesManagerState createState() => _FavoritesManagerState();
+}
+
+class _FavoritesManagerState extends State<FavoritesManager> {
+  Favorites _mgr = Favorites();
+  Future<List<String>> _order;
+
+  @override
+  void initState() {
+    _order = _mgr.get_favorites();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        centerTitle: false,
+        title: Text('Manage Favorites'),
+        backgroundColor: Colors.green,
+      ),
+      body: FutureBuilder<List<String>>(
+        future: _order,
+        builder: (ctx, snap) {
+          if (snap.connectionState == ConnectionState.waiting) {
+            return CircularProgressIndicator();
+          } else {
+            var order = snap.data.toList();
+            return ReorderableListView(
+              onReorder: (int oldIdx, int newIdx) {
+                if (newIdx > oldIdx) newIdx--;
+                order.insert(newIdx, order.removeAt(oldIdx));
+
+                setState(() {
+                  _mgr.set_favorites(order);
+                  _order = Future.value(order);
+                });
+              },
+              children: order.map((sport) {
+                return ListTile(
+                  key: Key(sport),
+                  title: Text(sport),
+                  trailing: Icon(Icons.drag_handle),
+                );
+              }).toList(),
+            );
+          }
+        },
+      ),
+    );
+  }
+}

lib/screens/home_widget.dart

@@ -32,6 +32,12 @@ class Home extends StatelessWidget {
                 onPressed: () => Navigator.pushNamed(context, '/Chat'),
               ),
             ),
+            ListTile(
+              title: IconButton(
+                icon: Icon(Icons.settings),
+                onPressed: ()=>Navigator.pushNamed(context, '/Favorites'),
+              ),
+            )
           ],
         ),
       ),

pubspec.lock

@@ -88,6 +88,11 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
   http:
     dependency: "direct main"
     description:
@@ -172,6 +177,34 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.23.1"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.5.6+3"
+  shared_preferences_macos:
+    dependency: transitive
+    description:
+      name: shared_preferences_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.1+6"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.2+4"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -242,4 +275,4 @@ packages:
     version: "3.5.0"
 sdks:
   dart: ">=2.6.0 <3.0.0"
-  flutter: ">=1.12.1"
+  flutter: ">=1.12.13+hotfix.4 <2.0.0"

pubspec.yaml

@@ -22,6 +22,7 @@ dependencies:
   flutter_bloc: ^3.2.0
 
   http: ^0.12.0+4
+  shared_preferences: ^0.5.6+3
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.