From 91614236e8b4a863c3cd4394dfccb36fa0cc8385 Mon Sep 17 00:00:00 2001
From: Christophe Deschamps
 <christophe.deschamps@belledonne-communications.com>
Date: Tue, 19 Sep 2023 13:02:05 +0200
Subject: [PATCH] Handle [misc]max_calls configuration flag inside the
 application

---
 Classes/LinphoneAppDelegate.m        |  5 +++++
 Classes/LinphoneManager.m            |  5 ++++-
 Classes/Swift/ProviderDelegate.swift | 18 +++++++++++++++++-
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/Classes/LinphoneAppDelegate.m b/Classes/LinphoneAppDelegate.m
index 973921b52..540c3b9a9 100644
--- a/Classes/LinphoneAppDelegate.m
+++ b/Classes/LinphoneAppDelegate.m
@@ -841,6 +841,11 @@
 - (void)ConfigurationStateUpdateEvent:(NSNotification *)notif {
 	LinphoneConfiguringState state = [[notif.userInfo objectForKey:@"state"] intValue];
 	if (state == LinphoneConfiguringSuccessful) {
+		if (linphone_config_has_entry(LinphoneManager.instance.configDb, "misc", "max_calls")) {  // Not doable on core on iOS (requires CallKit) -> flag moved to app section, and have app handle it in ProviderDelegate
+			linphone_config_set_int(LinphoneManager.instance.configDb, "app", "max_calls", linphone_config_get_int(LinphoneManager.instance.configDb,"misc", "max_calls",10));
+			linphone_config_clean_entry(LinphoneManager.instance.configDb, "misc", "max_calls");
+
+		}
 		[NSNotificationCenter.defaultCenter removeObserver:self name:kLinphoneConfiguringStateUpdate object:nil];
 		[_waitingIndicator dismissViewControllerAnimated:YES completion:nil];
 		UIAlertController *errView = [UIAlertController alertControllerWithTitle:NSLocalizedString(@"Success", nil)
diff --git a/Classes/LinphoneManager.m b/Classes/LinphoneManager.m
index da964e5f6..aa2c12a7d 100644
--- a/Classes/LinphoneManager.m
+++ b/Classes/LinphoneManager.m
@@ -1839,7 +1839,10 @@ static int comp_call_state_paused(const LinphoneCall *call, const void *param) {
 		factory = factoryIpad;
 	}
 	_configDb = linphone_config_new_for_shared_core(kLinphoneMsgNotificationAppGroupId.UTF8String, @"linphonerc".UTF8String, factory.UTF8String);
-	linphone_config_clean_entry(_configDb, "misc", "max_calls");
+	if (linphone_config_has_entry(_configDb, "misc", "max_calls")) { // Not doable on core on iOS (requires CallKit) -> flag moved to app section, and have app handle it in ProviderDelegate
+		linphone_config_set_int(_configDb, "app", "max_calls", linphone_config_get_int(_configDb,"misc", "max_calls",10));
+		linphone_config_clean_entry(_configDb, "misc", "max_calls");
+	}
 }
 #pragma mark - Audio route Functions
 
diff --git a/Classes/Swift/ProviderDelegate.swift b/Classes/Swift/ProviderDelegate.swift
index 6998bfefd..42024ea71 100644
--- a/Classes/Swift/ProviderDelegate.swift
+++ b/Classes/Swift/ProviderDelegate.swift
@@ -95,9 +95,21 @@ class ProviderDelegate: NSObject {
 		update.remoteHandle = CXHandle(type:.generic, value: handle)
 		update.hasVideo = hasVideo
 		update.localizedCallerName = displayName
-
+		
 		let callInfo = callInfos[uuid]
 		let callId = callInfo?.callId
+		
+		if (ConfigManager.instance().config?.hasEntry(section: "app", key: "max_calls") == 1)  { // moved from misc to app section intentionally upon app start or remote configuration
+			if let maxCalls = ConfigManager.instance().config?.getInt(section: "app",key: "max_calls",defaultValue: 10), Core.get().callsNb > maxCalls {
+				Log.directLog(BCTBX_LOG_MESSAGE, text: "CallKit: declining call, as max calls (\(maxCalls)) reached  call-id: [\(String(describing: callId))] and UUID: [\(uuid.description)]")
+				decline(uuid: uuid)
+				DispatchQueue.main.async {
+					try?call?.decline(reason: .Busy)
+				}
+				return
+			}
+		}
+		
 		Log.directLog(BCTBX_LOG_MESSAGE, text: "CallKit: report new incoming call with call-id: [\(String(describing: callId))] and UUID: [\(uuid.description)]")
 		//CallManager.instance().setHeldOtherCalls(exceptCallid: callId ?? "") 
 		provider.reportNewIncomingCall(with: uuid, update: update) { error in
@@ -144,6 +156,10 @@ class ProviderDelegate: NSObject {
 	func endCall(uuid: UUID) {
 		provider.reportCall(with: uuid, endedAt: .init(), reason: .failed)
 	}
+	
+	func decline(uuid: UUID) {
+		provider.reportCall(with: uuid, endedAt: .init(), reason: .unanswered)
+	}
 
 	func endCallNotExist(uuid: UUID, timeout: DispatchTime) {
 		DispatchQueue.main.asyncAfter(deadline: timeout) {