From e58437ecb2253652413783bcb6759c57e5c4a6a8 Mon Sep 17 00:00:00 2001
From: Danmei Chen <danmei.chen@belledonne-communications.com>
Date: Tue, 31 Mar 2020 21:42:56 +0200
Subject: [PATCH] add alert for forbidden push token

---
 Classes/PhoneMainView.m | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Classes/PhoneMainView.m b/Classes/PhoneMainView.m
index 88e35d6de..77751a760 100644
--- a/Classes/PhoneMainView.m
+++ b/Classes/PhoneMainView.m
@@ -363,6 +363,20 @@ static RootViewManager *rootViewManagerInstance = nil;
 		case LinphoneCallIncomingReceived:
 			if (!CallManager.callKitEnabled) {
 				[self displayIncomingCall:call];
+			} else if ([LinphoneManager.instance lpConfigIntForKey:@"unexpected_pushkit" withDefault:0] > 2) {
+				 dispatch_async(dispatch_get_main_queue(), ^{
+					 linphone_call_decline(call, LinphoneReasonUnknown);
+					 UIAlertController *errView =
+					 [UIAlertController alertControllerWithTitle:NSLocalizedString(@"Push token for calls is not valid anymore", nil)
+														 message:NSLocalizedString(@"Please delete all of your accounts from the server.", nil)
+												  preferredStyle:UIAlertControllerStyleAlert];
+
+					 UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:@"OK"
+																		style:UIAlertActionStyleDefault
+																	  handler:^(UIAlertAction *action) {}];
+
+					 [errView addAction:defaultAction];
+					 [self presentViewController:errView animated:YES completion:nil];});
 			}
 			break;
 		case LinphoneCallIncomingEarlyMedia: {