Adds the action identifier

Author: Hackmodford

packages/firebase_messaging/firebase_messaging/ios/firebase_messaging/Sources/firebase_messaging/FLTFirebaseMessagingPlugin.m

@@ -370,8 +370,11 @@ - (void)userNotificationCenter:(UNUserNotificationCenter *)center
   // coming from a terminated state.
   if (_notificationOpenedAppID != nil &&
       ![_initialNotificationID isEqualToString:_notificationOpenedAppID]) {
-    NSDictionary *notificationDict =
-        [FLTFirebaseMessagingPlugin remoteMessageUserInfoToDict:remoteNotification];
+    NSMutableDictionary *notificationDict =
+        [[FLTFirebaseMessagingPlugin remoteMessageUserInfoToDict:remoteNotification] mutableCopy];
+    if (response.actionIdentifier != nil) {
+      notificationDict[@"actionIdentifier"] = response.actionIdentifier;
+    }
     [_channel invokeMethod:@"Messaging#onMessageOpenedApp" arguments:notificationDict];
   }
 

packages/firebase_messaging/firebase_messaging_platform_interface/lib/src/remote_message.dart

@@ -11,6 +11,7 @@ class RemoteMessage {
   const RemoteMessage(
       {this.senderId,
       this.category,
+      this.actionIdentifier,
       this.collapseKey,
       this.contentAvailable = false,
       this.data = const <String, dynamic>{},
@@ -28,6 +29,7 @@ class RemoteMessage {
     return RemoteMessage(
       senderId: map['senderId'],
       category: map['category'],
+      actionIdentifier: map['actionIdentifier'],
       collapseKey: map['collapseKey'],
       contentAvailable: map['contentAvailable'] ?? false,
       data: map['data'] == null
@@ -77,6 +79,9 @@ class RemoteMessage {
   /// The iOS category this notification is assigned to.
   final String? category;
 
+  /// The iOS action identifier for the category
+  final String? actionIdentifier;
+
   /// The collapse key a message was sent with. Used to override existing messages with the same key.
   final String? collapseKey;