initial commit (migrated)

lib/core/app_updater.dart

@@ -0,0 +1,22 @@
+import 'package:in_app_update/in_app_update.dart';
+
+/// A wrapper of in-app update plugin
+abstract class AppUpdater {
+  /// Check for in-app update
+  Future<AppUpdateInfo> checkForUpdate();
+
+  /// Start update process
+  Future<AppUpdateResult> update();
+}
+
+class AppUpdaterImpl implements AppUpdater {
+  @override
+  Future<AppUpdateInfo> checkForUpdate() async {
+    return InAppUpdate.checkForUpdate();
+  }
+
+  @override
+  Future<AppUpdateResult> update() async {
+    return InAppUpdate.performImmediateUpdate();
+  }
+}