clean up

lib/data/provider/messaging_fcm.dart

@@ -0,0 +1,69 @@
+import 'dart:io';
+
+import 'package:fcs/data/services/messaging_service.dart';
+import 'package:firebase_messaging/firebase_messaging.dart';
+import 'package:logging/logging.dart';
+
+final msgLog = Logger('backgroundMessageHandler');
+
+Future<dynamic> backgroundMessageHandler(Map<String, dynamic> message) async {
+  if (message.containsKey('data')) {
+    // Handle data message
+    final dynamic data = message['data'];
+    msgLog.info("background onMessage: $message");
+  }
+
+  if (message.containsKey('notification')) {
+    // Handle notification message
+    final dynamic notification = message['notification'];
+  }
+}
+
+class MessagingFCM {
+  final log = Logger('MessagingFCM');
+
+  FirebaseMessaging _firebaseMessaging;
+
+  MessagingFCM(OnNotify onMessage,
+      {OnNotify onLaunch, OnNotify onResume, OnSetupComplete onSetupComplete}) {
+    _firebaseMessaging = FirebaseMessaging();
+    _firebaseMessaging.configure(
+      onMessage: (Map<String, dynamic> message) async {
+        log.info("onMessage: $message");
+        if (onMessage != null) _onNotify(message, onMessage);
+      },
+      onBackgroundMessage: Platform.isIOS ? null : backgroundMessageHandler,
+      onLaunch: (Map<String, dynamic> message) async {
+        log.info("onLaunch: $message");
+        if (onLaunch != null) _onNotify(message, onLaunch);
+      },
+      onResume: (Map<String, dynamic> message) async {
+        log.info("onResume: $message");
+        if (onResume != null) _onNotify(message, onResume);
+      },
+    );
+    _firebaseMessaging
+        .requestNotificationPermissions(const IosNotificationSettings());
+    _firebaseMessaging.onIosSettingsRegistered
+        .listen((IosNotificationSettings settings) {
+      log.info("Settings registered: $settings");
+    });
+    _firebaseMessaging.getToken().then((String token) {
+      if (onSetupComplete != null) onSetupComplete(token);
+      log.info("Messaging Token:$token");
+    });
+  }
+
+  Future<void> subscribeToTopic(String topic) {
+    return _firebaseMessaging.subscribeToTopic(topic);
+  }
+
+  _onNotify(Map<String, dynamic> message, OnNotify onNotify) {
+    var data = message['data'] ?? message;
+    onNotify(Map<String, dynamic>.from(message));
+  }
+
+  Future<void> unsubscribeToTopic(String topic) {
+    return _firebaseMessaging.unsubscribeFromTopic(topic);
+  }
+}