Implement sending DTMF tones through iOS native interface

Author: tmolitor-stud-tu

Monal/Classes/MLCall.m

@@ -89,6 +89,7 @@ @interface MLVoIPProcessor()
 -(void) removeCall:(MLCall*) call;
 -(void) initWebRTCForPendingCall:(MLCall*) call;
 -(void) handleIncomingJMIStanza:(MLXMLNode*) messageNode onAccount:(xmpp*) account;
+-(CXCallUpdate*) constructUpdateForCall:(MLCall*) call;
 @end
 
 @implementation MLCall
@@ -444,7 +445,13 @@ -(void) setIsConnected:(BOOL) isConnected
 
         //start timer once we are fully connected
         if(self.isConnected && self.audioSession != nil)
+        {
             [self startCallDuartionTimer];
+            dispatch_async(dispatch_get_main_queue(), ^{
+                //update call info to include the right info about dtmf support
+                [self.voipProcessor.cxProvider reportCallWithUUID:self.uuid updated:[self.voipProcessor constructUpdateForCall:self]];
+            });
+        }
     }
 
 #ifdef IS_ALPHA
@@ -493,7 +500,13 @@ -(void) setAudioSession:(AVAudioSession*) audioSession
 
         //start timer once we are fully connected
         if(self.isConnected && self.audioSession != nil)
+        {
             [self startCallDuartionTimer];
+            dispatch_async(dispatch_get_main_queue(), ^{
+                //update call info to include the right info about dtmf support
+                [self.voipProcessor.cxProvider reportCallWithUUID:self.uuid updated:[self.voipProcessor constructUpdateForCall:self]];
+            });
+        }
     }
 }
 -(AVAudioSession*) audioSession

Monal/Classes/MLVoIPProcessor.m

@@ -704,6 +704,25 @@ -(void) provider:(CXProvider*) provider performAnswerCallAction:(CXAnswerCallAct
     [appDelegate.activeChats presentCall:call];
 }
 
+-(void) provider:(CXProvider*) provider performPlayDTMFCallAction:(CXPlayDTMFCallAction*) action
+{
+    MLCall* call = [self getCallForUUID:action.callUUID];
+    DDLogDebug(@"CXProvider: performPlayDTMFCallAction with provider=%@, performPlayDTMFCallAction=%@, pendingCallsInfo: %@", provider, action, call);
+    if(call == nil)
+    {
+        DDLogWarn(@"Pending call not present anymore: %@", (@{
+            @"provider": provider,
+            @"action": action,
+            @"uuid": action.callUUID,
+        }));
+        [action fail];
+        return;
+    }
+    
+    [call sendDtmf:action.digits];
+    [action fulfill];
+}
+
 -(void) provider:(CXProvider*) provider performEndCallAction:(CXEndCallAction*) action
 {
     MLCall* call = [self getCallForUUID:action.callUUID];
@@ -804,7 +823,7 @@ -(CXCallUpdate*) constructUpdateForCall:(MLCall*) call
     CXCallUpdate* update = [CXCallUpdate new];
     update.remoteHandle = [[CXHandle alloc] initWithType:CXHandleTypeGeneric value:call.contact.contactJid];
     update.localizedCallerName = call.contact.contactDisplayName;
-    update.supportsDTMF = NO;
+    update.supportsDTMF = call.canSendDtmf;
     update.hasVideo = call.callType == MLCallTypeVideo;
     update.supportsHolding = NO;
     update.supportsGrouping = NO;