fix: handle failed to create RTCPeerConnection object error in a call

Author: coder-with-a-bushido

.gitignore

@@ -18,6 +18,7 @@ coverage/
 coverage_badge.svg
 coverage.xml
 TEST-report.*
+coverage_dir/*
 
 # IntelliJ related
 *.iml

lib/src/voip/call_session.dart

@@ -207,6 +207,9 @@ class CallSession {
   // outgoing call
   Future<void> initOutboundCall(CallType type) async {
     await _preparePeerConnection();
+    if (pc == null) {
+      return;
+    }
     setCallState(CallState.kCreateOffer);
     final stream = await _getUserMedia(type);
     if (stream != null) {
@@ -262,6 +265,10 @@ class CallSession {
     }
 
     await _preparePeerConnection();
+    if (pc == null) {
+      return;
+    }
+
     if (metadata != null) {
       _updateRemoteSDPStreamMetadata(metadata);
     }
@@ -357,6 +364,10 @@ class CallSession {
     // create the peer connection now so it can be gathering candidates while we get user
     // media (assuming a candidate pool size is configured)
     await _preparePeerConnection();
+    if (pc == null) {
+      return;
+    }
+
     await gotCallFeedsForInvite(
       callFeeds,
       requestScreenSharing: requestScreenSharing,
@@ -1218,7 +1229,8 @@ class CallSession {
         }
       };
     } catch (e) {
-      Logs().v('[VOIP] prepareMediaStream error => ${e.toString()}');
+      Logs().v('[VOIP] preparePeerConnection error => ${e.toString()}');
+      await _createPeerConnectionFailed(e);
     }
   }
 
@@ -1454,10 +1466,19 @@ class CallSession {
     }
   }
 
+  Future<void> _createPeerConnectionFailed(dynamic err) async {
+    Logs().e('Failed to create peer connection object ${err.toString()}');
+    fireCallEvent(CallStateChange.kError);
+    await terminate(
+      CallParty.kLocal,
+      CallErrorCode.createPeerConnectionFailed,
+      true,
+    );
+  }
+
   Future<void> _getLocalOfferFailed(dynamic err) async {
     Logs().e('Failed to get local offer ${err.toString()}');
     fireCallEvent(CallStateChange.kError);
-
     await terminate(CallParty.kLocal, CallErrorCode.localOfferFailed, true);
   }
 

lib/src/voip/utils/types.dart

@@ -40,6 +40,9 @@ enum CallErrorCode {
   /// The user chose to end the call
   userHangup('user_hangup'),
 
+  /// An error code when creating peer connection object fails locally.
+  createPeerConnectionFailed('create_peer_connection_failed'),
+
   /// An error code when the local client failed to create an offer.
   localOfferFailed('local_offer_failed'),