1 files changed, 43 insertions, 0 deletions
diff --git a/lib/data/favorites.dart b/lib/data/favorites.dart
new file mode 100644
index 0000000..aad98ee
--- /dev/null
+++ b/lib/data/favorites.dart
@@ -0,0 +1,43 @@
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:device_apps/device_apps.dart';
+import 'dart:async';
+
+const String FAVORITES = 'favorites';
+const String SEPERATOR = ',';
+
+StreamController<List<Application>> favorites_$ = StreamController<List<Application>>.broadcast();
+
+Future<List<Application>> getFavorites() async {
+  final prefs = await SharedPreferences.getInstance();
+
+  String rawFavoritesList = prefs.getString(FAVORITES);
+  List<String> packageNames = rawFavoritesList?.split(SEPERATOR) ?? <String>[];
+
+  return Future.wait(packageNames.map((String pkg) => DeviceApps.getApp(pkg)));
+}
+
+void initFavorites() async {
+  List<Application> fs = await getFavorites();
+  favorites_$.add(fs);
+}
+
+Stream<List<Application>> getFavorites$() {
+  return favorites_$.stream;
+}
+
+void setFavorites(List<Application> favs) async {
+  final prefs = await SharedPreferences.getInstance();
+
+  String rawFavoritesList = favs.map((Application app) => app.packageName).join(SEPERATOR);
+  
+  prefs.setString(FAVORITES, rawFavoritesList);
+
+  favorites_$.add(await getFavorites());
+}
+
+void addToFavorites(Application app) async {
+  List<Application> fs = await getFavorites();
+  fs.add(app);
+  await setFavorites(fs);
+}
+