Why I can't mutate fcm push content in NotificationServiceExtension? - ios

Question

I mat the problem with fcm push. I received push notification from our backend and I need change aps title.
For one type of payload notification service extension change title, for another not.
For these payload everything ok:
**POST:** https://fcm.googleapis.com/fcm/send
body:
{
"to" : "my fcm token",
"mutable_content": true,
"notification": {
"title": "{ some code } камера не в сети",
"body": "какое то тело"
},
"data": {
"type": 18990
}
}
Result:
UserInfo:
**type = 18990,**
gcm.message_id = 1669107644621636,
aps = {
alert = {
body = "\U043a\U0430\U043a\U043e\U0435 \U0442\U043e \U0442\U0435\U043b\U043e";
title = "{ some code } \U043a\U0430\U043c\U0435\U0440\U0430 \U043d\U0435 \U0432 \U0441\U0435\U0442\U0438";
};
"mutable-content" = 1;
},
google.c.fid = anyKey,
google.c.sender.id = 0000,
google.c.a.e = 1
But with these I had the problem:
**POST:** https://fcm.googleapis.com/fcm/send
body:
{
"to" : "my fcm token",
"mutable_content": true,
"notification": {
"title": "{ some code } камера не в сети",
"body": "какое то тело"
},
"data": {
"userAgreementId": 18990
}
}
Result:
UserInfo:
**userAgreementId = 18990**,
gcm.message_id = 1669107519431159,
aps = {
alert = {
body = "\U043a\U0430\U043a\U043e\U0435 \U0442\U043e \U0442\U0435\U043b\U043e";
title = "{ some code } \U043a\U0430\U043c\U0435\U0440\U0430 \U043d\U0435 \U0432 \U0441\U0435\U0442\U0438";
};
"mutable-content" = 1;
},
google.c.fid = anyKey,
google.c.sender.id = 0000,
google.c.a.e = 1
title change I did as mentioned in apple documentation (https://developer.apple.com/documentation/usernotifications/modifying_content_in_newly_delivered_notifications)
I override both:
override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: #escaping (UNNotificationContent) -> Void) {
self.contentHandler = contentHandler
bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
let userInfo = bestAttemptContent?.userInfo as? [String: Any]
if let bestAttemptContent = bestAttemptContent {
var title = bestAttemptContent.title
if let title_ = ((userInfo?["aps"] as? [String: Any])?["alert"] as? [String: Any])?["title"] as? String {
title = title_
}
title = title.lowercased().contains("камера не в сети") ? "Камера не в сети" : title
bestAttemptContent.title = title
contentHandler(bestAttemptContent)
}
}
and
override func serviceExtensionTimeWillExpire() {
// Called just before the extension will be terminated by the system.
// Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used.
if let contentHandler = contentHandler, let bestAttemptContent = bestAttemptContent {
let userInfo = bestAttemptContent.userInfo as? [String: Any]
var title = bestAttemptContent.title
if let title_ = ((userInfo?["aps"] as? [String: Any])?["alert"] as? [String: Any])?["title"] as? String {
title = title_
}
title = title.lowercased().contains("камера не в сети") ? "Камера не в сети" : title
bestAttemptContent.title = title
contentHandler(bestAttemptContent)
}
}