From 40c9bdd364c1e111783b104bac11f2503a08e7bc Mon Sep 17 00:00:00 2001
From: Koen Van Looveren <koen.vanlooveren@icapps.com>
Date: Wed, 23 Dec 2020 14:34:43 +0100
Subject: [PATCH] #8 Fixed the issue where the plugins were not yet registered

---
 ios/Classes/BackgroundLocationTrackerPlugin.m    |  6 ++++++
 lib/src/background_location_tracker_manager.dart |  3 +--
 lib/src/channel/background_channel.dart          | 10 +++++-----
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/ios/Classes/BackgroundLocationTrackerPlugin.m b/ios/Classes/BackgroundLocationTrackerPlugin.m
index 909c4b2..bc23b12 100644
--- a/ios/Classes/BackgroundLocationTrackerPlugin.m
+++ b/ios/Classes/BackgroundLocationTrackerPlugin.m
@@ -9,7 +9,13 @@
 #endif
 
 @implementation BackgroundLocationTrackerPlugin
+
 + (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
   [SwiftBackgroundLocationTrackerPlugin registerWithRegistrar:registrar];
 }
+
++ (void)setPluginRegistrantCallback:(FlutterPluginRegistrantCallback)callback {
+    [SwiftBackgroundLocationTrackerPlugin setPluginRegistrantCallback:callback];
+}
+
 @end
diff --git a/lib/src/background_location_tracker_manager.dart b/lib/src/background_location_tracker_manager.dart
index b16ebea..b817374 100644
--- a/lib/src/background_location_tracker_manager.dart
+++ b/lib/src/background_location_tracker_manager.dart
@@ -6,10 +6,9 @@ import 'package:background_location_tracker/src/model/background_location_update
 import 'package:background_location_tracker/src/model/config/background_location_tracker_config.dart';
 import 'package:background_location_tracker/src/util/logger.dart';
 
-typedef LocationUpdateCallback = void Function(BackgroundLocationUpdateData data);
+typedef LocationUpdateCallback = Future<void> Function(BackgroundLocationUpdateData data);
 
 class BackgroundLocationTrackerManager {
-
   static Future<void> initialize(Function callback, {BackgroundLocationTrackerConfig config}) {
     final pluginConfig = config ??= const BackgroundLocationTrackerConfig();
     BackgroundLocationTrackerLogger.enableLogging = pluginConfig.loggingEnabled;
diff --git a/lib/src/channel/background_channel.dart b/lib/src/channel/background_channel.dart
index 448011b..8e167d0 100644
--- a/lib/src/channel/background_channel.dart
+++ b/lib/src/channel/background_channel.dart
@@ -13,10 +13,9 @@ class BackgroundChannel {
       ..setMethodCallHandler((call) async {
         switch (call.method) {
           case 'onLocationUpdate':
-            await handleLocationUpdate(call, callback, enableLogging: enableLogging);
-            break;
+            return handleLocationUpdate(call, callback, enableLogging: enableLogging);
           default:
-            break;
+            return false;
         }
       })
       ..invokeMethod<void>(
@@ -24,13 +23,14 @@ class BackgroundChannel {
       );
   }
 
-  static Future<void> handleLocationUpdate(MethodCall call, LocationUpdateCallback callback, {bool enableLogging = false}) async {
+  static Future<bool> handleLocationUpdate(MethodCall call, LocationUpdateCallback callback, {bool enableLogging = false}) async {
     final data = call.arguments as Map<dynamic, dynamic>; // ignore: avoid_as
     final isLoggingEnabled = data['logging_enabled'] as bool; // ignore: avoid_as
     BackgroundLocationTrackerLogger.enableLogging = isLoggingEnabled;
     BackgroundLocationTrackerLogger.log('locationUpdate: ${call.arguments}');
     final lat = data['lat'] as double; // ignore: avoid_as
     final lon = data['lon'] as double; // ignore: avoid_as
-    callback(BackgroundLocationUpdateData(lat: lat, lon: lon));
+    await callback(BackgroundLocationUpdateData(lat: lat, lon: lon));
+    return true;
   }
 }