TF-2877 Create notification data source & repo

lib/main/permissions/notification_permission_service.dart

@@ -0,0 +1,28 @@
+import 'package:permission_handler/permission_handler.dart';
+import 'package:tmail_ui_user/features/base/isolate/background_isolate_binary_messenger/background_isolate_binary_messenger_mobile.dart';
+import 'package:tmail_ui_user/main/permissions/permission_service.dart';
+
+class NotificationPermissionService extends PermissionService {
+
+  Future<bool> checkGroupPermissionByGroupId(String groupId) async {
+    if (groupId.isEmpty) {
+      return false;
+    }
+
+    const methodChannel = MethodChannel('com.linagora.android.teammail.notification.group.permission');
+    const methodName = 'getNotificationGroupPermission';
+    final invokeResult = await methodChannel.invokeMethod<bool>(
+      methodName,
+      groupId);
+    return invokeResult ?? false;
+  }
+
+  Future<bool> checkNotificationPermissionEnabled(String groupId) async {
+    final permissionGranted = await isGranted(Permission.notification);
+    if (!permissionGranted) {
+      return false;
+    }
+
+    return await checkGroupPermissionByGroupId(groupId);
+  }
+}

lib/main/permissions/permission_service.dart

@@ -0,0 +1,17 @@
+import 'package:permission_handler/permission_handler.dart';
+
+class PermissionService {
+  Future<bool> isGranted(Permission permission) async {
+    final current = await permission.status;
+    switch (current) {
+      case PermissionStatus.granted:
+        return true;
+      case PermissionStatus.denied:
+        final requestResult = await permission.request();
+        final permissionGranted = requestResult == PermissionStatus.granted;
+        return permissionGranted;
+      default:
+        return false;
+    }
+  }
+}