ios: integrating webrtc calls with callkit (#686)

* ios: integrating webrtc calls with callkit

* accept call via chat item (e.g. when DND is on, and callkit blocks the call); refactor

* fix remote video, support logging from ios

* use callkit depending on CallController setting

* call sound

* update incoming call view

* fixing audio encryption

* refactor encryption webrtc fix

* log ontrack success/error

* accept / ignore call via notification

* remove unused imports

* remove unused file

* remove comments

src/Simplex/Chat.hs

@@ -880,6 +880,7 @@ callStatusItemContent userId Contact {contactId} chatItemId receivedStatus = do
         (Just CISCallPending, WCSDisconnected) -> Just (CISCallMissed, 0)
         (Just CISCallEnded, _) -> Nothing -- if call already ended or failed -> no change
         (Just CISCallError, _) -> Nothing
+        (Just _, WCSConnecting) -> Just (CISCallNegotiated, 0)
         (Just _, WCSConnected) -> Just (CISCallProgress, 0) -- if call ended that was never connected, duration = 0
         (Just _, WCSDisconnected) -> Just (CISCallEnded, 0)
         (Just _, WCSFailed) -> Just (CISCallError, 0)

src/Simplex/Chat/Call.hs

@@ -202,16 +202,18 @@ instance ToJSON WebRTCExtraInfo where
   toJSON = J.genericToJSON J.defaultOptions
   toEncoding = J.genericToEncoding J.defaultOptions
 
-data WebRTCCallStatus = WCSConnected | WCSDisconnected | WCSFailed
+data WebRTCCallStatus = WCSConnecting | WCSConnected | WCSDisconnected | WCSFailed
   deriving (Show)
 
 instance StrEncoding WebRTCCallStatus where
   strEncode = \case
+    WCSConnecting -> "connecting"
     WCSConnected -> "connected"
     WCSDisconnected -> "disconnected"
     WCSFailed -> "failed"
   strP =
     A.takeTill (== ' ') >>= \case
+      "connecting" -> pure WCSConnecting
       "connected" -> pure WCSConnected
       "disconnected" -> pure WCSDisconnected
       "failed" -> pure WCSFailed