[firebase_messaging] Enable compatibility with other notification plugins

packages/firebase_messaging/CHANGELOG.md

@@ -1,3 +1,14 @@
+## 6.0.13
+
+* Implement `UNUserNotificationCenterDelegate` methods to allow plugin to work when method swizzling is disabled.
+* Applications now only need to update their iOS project's `AppDelegate` when method swizzling is disabled.
+* Applications that need to use `firebase_messaging` with other notification plugins will need to
+  add the following to their iOS project's `Info.plist` file:
+  ```xml
+  <key>FirebaseAppDelegateProxyEnabled</key>
+  <false/>
+  ```
+
 ## 6.0.12
 
 * Replace deprecated `getFlutterEngine` call on Android.

packages/firebase_messaging/README.md

@@ -167,7 +167,14 @@ To integrate your plugin into the iOS part of your app, follow these steps:
 
 1. Follow the steps in the "[Upload your APNs certificate](https://firebase.google.com/docs/cloud-messaging/ios/client#upload_your_apns_certificate)" section of the Firebase docs.
 
-1. Add the following lines to the `(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions`
+1. If you need to disable the method swizzling done by the FCM iOS SDK (e.g. so that you can use this plugin with other notification plugins) then add the following to your application's `Info.plist` file.
+
+```xml
+<key>FirebaseAppDelegateProxyEnabled</key>
+<false/>
+```
+
+After that, add the following lines to the `(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions`
 method in the `AppDelegate.m`/`AppDelegate.swift` of your iOS project.
 
 Objective-C:

packages/firebase_messaging/ios/Classes/FLTFirebaseMessagingPlugin.m

@@ -9,6 +9,8 @@
 
 #import "Firebase/Firebase.h"
 
+NSString *const kGCMMessageIDKey = @"gcm.message_id";
+
 #if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
 @interface FLTFirebaseMessagingPlugin () <FIRMessagingDelegate>
 @end
@@ -139,7 +141,7 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
   } else if ([@"configure" isEqualToString:method]) {
     [FIRMessaging messaging].shouldEstablishDirectChannel = true;
     [[UIApplication sharedApplication] registerForRemoteNotifications];
-    if (_launchNotification != nil) {
+    if (_launchNotification != nil && _launchNotification[kGCMMessageIDKey]) {
       [_channel invokeMethod:@"onLaunch" arguments:_launchNotification];
     }
     result(nil);
@@ -189,10 +191,39 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
 }
 
 #if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
-// Receive data message on iOS 10 devices while app is in the foreground.
+// Received data message on iOS 10 devices while app is in the foreground.
+// Only invoked if method swizzling is enabled.
 - (void)applicationReceivedRemoteMessage:(FIRMessagingRemoteMessage *)remoteMessage {
   [self didReceiveRemoteNotification:remoteMessage.appData];
 }
+
+// Received data message on iOS 10 devices while app is in the foreground.
+// Only invoked if method swizzling is disabled and UNUserNotificationCenterDelegate has been
+// registered in AppDelegate
+- (void)userNotificationCenter:(UNUserNotificationCenter *)center
+       willPresentNotification:(UNNotification *)notification
+         withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler
+    NS_AVAILABLE_IOS(10.0) {
+  NSDictionary *userInfo = notification.request.content.userInfo;
+  // Check to key to ensure we only handle messages from Firebase
+  if (userInfo[kGCMMessageIDKey]) {
+    [[FIRMessaging messaging] appDidReceiveMessage:userInfo];
+    [_channel invokeMethod:@"onMessage" arguments:userInfo];
+    completionHandler(UNNotificationPresentationOptionNone);
+  }
+}
+
+- (void)userNotificationCenter:(UNUserNotificationCenter *)center
+    didReceiveNotificationResponse:(UNNotificationResponse *)response
+             withCompletionHandler:(void (^)(void))completionHandler NS_AVAILABLE_IOS(10.0) {
+  NSDictionary *userInfo = response.notification.request.content.userInfo;
+  // Check to key to ensure we only handle messages from Firebase
+  if (userInfo[kGCMMessageIDKey]) {
+    [_channel invokeMethod:@"onResume" arguments:userInfo];
+    completionHandler();
+  }
+}
+
 #endif
 
 - (void)didReceiveRemoteNotification:(NSDictionary *)userInfo {

packages/firebase_messaging/pubspec.yaml

@@ -2,7 +2,7 @@ name: firebase_messaging
 description: Flutter plugin for Firebase Cloud Messaging, a cross-platform
   messaging solution that lets you reliably deliver messages on Android and iOS.
 homepage: https://github.com/FirebaseExtended/flutterfire/tree/master/packages/firebase_messaging
-version: 6.0.12
+version: 6.0.13
 
 flutter:
   plugin: