Merge pull request 'LH-259-mediasoup-always-return-a-callback-response-to-clients' (#13) from LH-259-mediasoup-always-return-a-callback-response-to-clients into develop

Reviewed-on: #13

app.js

@@ -124,16 +124,6 @@ const closeCall = (callId) => {
   }
 }
 
-const getRtpCapabilities = (callId, callback) => {
-  try {
-    console.log('[getRtpCapabilities] callId', callId);
-    const rtpCapabilities = videoCalls[callId].router.rtpCapabilities;
-    callback({ rtpCapabilities });
-  } catch (error) {
-    console.log(`ERROR | getRtpCapabilities | callId ${callId} | ${error.message}`);
-  }
-}
-
 /*
   - Handlers for WS events
   - These are created only when we have a connection with a peer
@@ -160,7 +150,9 @@ peers.on('connection', async socket => {
     - If the room already exists, it will not create it, but will only return rtpCapabilities
   */
   socket.on('createRoom', async ({ callId }, callback) => {
+    let callbackResponse = null;
     try {
+      // We can continue with the room creation process only if we have a callId
       if (callId) {
         console.log(`[createRoom] socket.id ${socket.id} callId ${callId}`);
         if (!videoCalls[callId]) {
@@ -169,12 +161,19 @@ peers.on('connection', async socket => {
           console.log(`[createRoom] Router ID: ${videoCalls[callId].router.id}`);
         }
         socketDetails[socket.id] = callId;
-        getRtpCapabilities(callId, callback);
+
+        // rtpCapabilities is set for callback
+        console.log('[getRtpCapabilities] callId', callId);
+        callbackResponse = { 
+          rtpCapabilities :videoCalls[callId].router.rtpCapabilities
+        };
       } else {
         console.log(`[createRoom] missing callId ${callId}`);
       }
     } catch (error) {
       console.log(`ERROR | createRoom | callId ${callId} | ${error.message}`);
+    } finally {
+      callback(callbackResponse);
     }
   });
 
@@ -195,16 +194,19 @@ peers.on('connection', async socket => {
           videoCalls[callId].producerTransport = await createWebRtcTransportLayer(callId, callback);
         } else {
           console.log(`producerTransport has already been defined | callId ${callId}`);
+          callback(null);
         }
       } else if (!sender) {
         if (!videoCalls[callId].consumerTransport) {
           videoCalls[callId].consumerTransport = await createWebRtcTransportLayer(callId, callback);
         } else {
           console.log(`consumerTransport has already been defined | callId ${callId}`);
+          callback(null);
         }
       }
     } catch (error) {
       console.log(`ERROR | createWebRtcTransport | callId ${socketDetails[socket.id]} | sender ${sender} | ${error.message}`);
+      callback(error);
     }
   });
 
@@ -248,9 +250,9 @@ peers.on('connection', async socket => {
       });
 
       // Send back to the client the Producer's id
-      // callback({
-      //   id: videoCalls[callId].producer.id
-      // });
+      callback && callback({
+        id: videoCalls[callId].producer.id
+      });
     } catch (error) {
       console.log(`ERROR | transport-produce | callId ${socketDetails[socket.id]} | ${error.message}`);
     }
@@ -321,6 +323,7 @@ peers.on('connection', async socket => {
         callback({ params });
       } else {
         console.log(`[canConsume] Can't consume | callId ${callId}`);
+        callback(null);
       }
     } catch (error) {
       console.log(`ERROR | consume | callId ${socketDetails[socket.id]} | ${error.message}`)