Send participant sid on reconnect (#156)

* Add participant sid when reconnecting

* tests

@@ -25,4 +25,5 @@ data class ConnectOptions(
     val protocolVersion: ProtocolVersion = ProtocolVersion.v8
 ) {
     internal var reconnect: Boolean = false
+    internal var participantSid: String? = null
 }

@@ -86,6 +86,7 @@ internal constructor(
     private var sessionToken: String? = null
     private var connectOptions: ConnectOptions? = null
     private var lastRoomOptions: RoomOptions? = null
+    private var participantSid: String? = null
 
     private val publisherObserver = PublisherTransportObserver(this, client)
     private val subscriberObserver = SubscriberTransportObserver(this, client)
@@ -163,6 +164,12 @@ internal constructor(
             return
         }
 
+        participantSid = if (joinResponse.hasParticipant()) {
+            joinResponse.participant.sid
+        } else {
+            null
+        }
+
         // update ICE servers before creating PeerConnection
         val iceServers = if (connectOptions?.iceServers != null) {
             connectOptions.iceServers
@@ -312,6 +319,7 @@ internal constructor(
         sessionToken = null
         connectOptions = null
         lastRoomOptions = null
+        participantSid = null
         reconnectingJob?.cancel()
         reconnectingJob = null
         coroutineScope.close()
@@ -392,7 +400,7 @@ internal constructor(
                     LKLog.v { "Attempting soft reconnect." }
                     subscriber.prepareForIceRestart()
                     try {
-                        client.reconnect(url, token)
+                        client.reconnect(url, token, participantSid)
                         // no join response for regular reconnects
                         client.onReadyForResponses()
                     } catch (e: Exception) {

@@ -88,12 +88,15 @@ constructor(
     /**
      * @throws Exception if fails to connect.
      */
-    suspend fun reconnect(url: String, token: String) {
+    suspend fun reconnect(url: String, token: String, participantSid: String?) {
         connect(
             url,
             token,
             (lastOptions ?: ConnectOptions()).copy()
-                .apply { reconnect = true },
+                .apply {
+                    reconnect = true
+                    this.participantSid = participantSid
+                },
             lastRoomOptions ?: RoomOptions()
         )
     }
@@ -141,6 +144,9 @@ constructor(
 
         if (options.reconnect) {
             queryParams.add(CONNECT_QUERY_RECONNECT to 1.toString())
+            options.participantSid?.let { sid ->
+                queryParams.add(CONNECT_QUERY_PARTICIPANT_SID to sid)
+            }
         }
 
         val autoSubscribe = if (options.autoSubscribe) 1 else 0
@@ -671,6 +677,7 @@ constructor(
         const val CONNECT_QUERY_OS = "os"
         const val CONNECT_QUERY_OS_VERSION = "os_version"
         const val CONNECT_QUERY_NETWORK_TYPE = "network"
+        const val CONNECT_QUERY_PARTICIPANT_SID = "sid"
 
         const val SD_TYPE_ANSWER = "answer"
         const val SD_TYPE_OFFER = "offer"

@@ -30,7 +30,7 @@ class RTCEngineMockE2ETest : MockE2ETest() {
     @Test
     fun iceSubscriberConnect() = runTest {
         connect()
-        Assert.assertEquals(
+        assertEquals(
             SignalClientTest.OFFER.offer.sdp,
             rtcEngine.subscriber.peerConnection.remoteDescription.description
         )
@@ -43,9 +43,9 @@ class RTCEngineMockE2ETest : MockE2ETest() {
         val subPeerConnection = rtcEngine.subscriber.peerConnection as MockPeerConnection
         val localAnswer = subPeerConnection.localDescription ?: throw IllegalStateException("no answer was created.")
         Assert.assertTrue(sentRequest.hasAnswer())
-        Assert.assertEquals(localAnswer.description, sentRequest.answer.sdp)
-        Assert.assertEquals(localAnswer.type.canonicalForm(), sentRequest.answer.type)
-        Assert.assertEquals(ConnectionState.CONNECTED, rtcEngine.connectionState)
+        assertEquals(localAnswer.description, sentRequest.answer.sdp)
+        assertEquals(localAnswer.type.canonicalForm(), sentRequest.answer.type)
+        assertEquals(ConnectionState.CONNECTED, rtcEngine.connectionState)
     }
 
     @Test
@@ -95,7 +95,7 @@ class RTCEngineMockE2ETest : MockE2ETest() {
         testScheduler.advanceUntilIdle()
         val newToken = wsFactory.request.url.queryParameter(SignalClient.CONNECT_QUERY_TOKEN)
         Assert.assertNotEquals(oldToken, newToken)
-        Assert.assertEquals(SignalClientTest.REFRESH_TOKEN.refreshToken, newToken)
+        assertEquals(SignalClientTest.REFRESH_TOKEN.refreshToken, newToken)
     }
 
     @Test
@@ -114,4 +114,13 @@ class RTCEngineMockE2ETest : MockE2ETest() {
         val pubPeerConnection = rtcEngine.subscriber.peerConnection as MockPeerConnection
         assertEquals(PeerConnection.IceTransportsType.RELAY, pubPeerConnection.rtcConfig.iceTransportsType)
     }
+
+    fun participantIdOnReconnect() = runTest {
+        connect()
+        wsFactory.listener.onFailure(wsFactory.ws, Exception(), null)
+
+        testScheduler.advanceUntilIdle()
+        val sid = wsFactory.request.url.queryParameter(SignalClient.CONNECT_QUERY_PARTICIPANT_SID)
+        assertEquals(SignalClientTest.JOIN.join.participant.sid, sid)
+    }
 }
\ No newline at end of file

@@ -82,7 +82,7 @@ class SignalClientTest : BaseTest() {
     @Test
     fun reconnect() = runTest {
         val job = async {
-            client.reconnect(EXAMPLE_URL, "")
+            client.reconnect(EXAMPLE_URL, "", "participant_sid")
         }
 
         client.onOpen(wsFactory.ws, createOpenResponse(wsFactory.request))
@@ -197,7 +197,7 @@ class SignalClientTest : BaseTest() {
         client.sendMuteTrack("sid", true)
         client.sendMuteTrack("sid", true)
 
-        val job = async { client.reconnect(EXAMPLE_URL, "") }
+        val job = async { client.reconnect(EXAMPLE_URL, "", "participant_sid") }
         client.onOpen(wsFactory.ws, createOpenResponse(wsFactory.request))
         job.await()