Moved callbacks to Room, removed Remote*Track classes

@@ -137,7 +137,7 @@ constructor(
     interface Listener {
         fun onJoin(response: LivekitRtc.JoinResponse)
         fun onAddTrack(track: MediaStreamTrack, streams: Array<out MediaStream>)
-        fun onPublishLocalTrack(cid: String, track: LivekitModels.TrackInfo)
+//        fun onPublishLocalTrack(cid: String, track: LivekitModels.TrackInfo)
         fun onAddDataChannel(channel: DataChannel)
         fun onUpdateParticipants(updates: List<LivekitModels.ParticipantInfo>)
         fun onUpdateSpeakers(speakers: List<LivekitRtc.SpeakerInfo>)
@@ -267,8 +267,7 @@ constructor(
             return
         }
         cont.resume(response.track)
-        listener?.onPublishLocalTrack(cid, track)
-
+//        listener?.onPublishLocalTrack(cid, track)
     }
 
     override fun onParticipantUpdate(updates: List<LivekitModels.ParticipantInfo>) {

@@ -9,10 +9,14 @@ import io.livekit.android.ConnectOptions
 import io.livekit.android.room.participant.LocalParticipant
 import io.livekit.android.room.participant.Participant
 import io.livekit.android.room.participant.RemoteParticipant
+import io.livekit.android.room.track.DataTrack
+import io.livekit.android.room.track.Track
+import io.livekit.android.room.track.TrackPublication
 import io.livekit.android.room.util.unpackedTrackLabel
 import livekit.LivekitModels
 import livekit.LivekitRtc
 import org.webrtc.*
+import java.nio.ByteBuffer
 import kotlin.coroutines.Continuation
 import kotlin.coroutines.resume
 import kotlin.coroutines.suspendCoroutine
@@ -45,7 +49,7 @@ constructor(
         private set
     var state: State = State.DISCONNECTED
         private set
-    var localParticipant: LocalParticipant? = null
+    lateinit var localParticipant: LocalParticipant
         private set
     private val mutableRemoteParticipants = mutableMapOf<String, RemoteParticipant>()
     val remoteParticipants: Map<String, RemoteParticipant>
@@ -57,10 +61,6 @@ constructor(
 
     private var connectContinuation: Continuation<Unit>? = null
     suspend fun connect(url: String, token: String) {
-        if (localParticipant != null) {
-            Timber.d { "Attempting to connect to room when already connected." }
-            return
-        }
         engine.join(url, token)
 
         return suspendCoroutine { connectContinuation = it }
@@ -120,7 +120,7 @@ constructor(
             }
         }
 
-        if (localParticipant != null && !seenSids.contains(localParticipant.sid)) {
+        if (!seenSids.contains(localParticipant.sid)) {
             localParticipant.audioLevel = 0.0f
         }
         remoteParticipants.values
@@ -140,22 +140,6 @@ constructor(
         fun create(connectOptions: ConnectOptions): Room
     }
 
-    /**
-     * Room Listener, this class provides callbacks that clients should override.
-     *
-     */
-    interface Listener {
-        fun onConnect(room: Room) {}
-        fun onDisconnect(room: Room, error: Exception?) {}
-        fun onParticipantConnected(room: Room, participant: RemoteParticipant) {}
-        fun onParticipantDisconnected(room: Room, participant: RemoteParticipant) {}
-        fun onFailedToConnect(room: Room, error: Exception) {}
-        fun onReconnecting(room: Room, error: Exception) {}
-        fun onReconnect(room: Room) {}
-        fun onMetadataChanged(room: Room, Participant: Participant, prevMetadata: String?) {}
-        fun onActiveSpeakersChanged(speakers: List<Participant>, room: Room) {}
-    }
-
     //----------------------------------- RTCEngine.Listener ------------------------------------//
     /**
      * @suppress
@@ -163,25 +147,18 @@ constructor(
     override fun onJoin(response: LivekitRtc.JoinResponse) {
         Timber.v { "engine did join, version: ${response.serverVersion}" }
 
-        try {
-            val serverVersion = Semver(response.serverVersion)
-            if (serverVersion.major == 0 && serverVersion.minor < 5) {
-                Timber.e { "This version of livekit requires server version >= 0.5.x" }
-                return
-            }
-        } catch (e: Exception) {
-            Timber.e { "Unable to parse server version!" }
-            return
-        }
         state = State.CONNECTED
         sid = Sid(response.room.sid)
         name = response.room.name
 
-        if (response.hasParticipant()) {
+        if (!response.hasParticipant()) {
+            listener?.onFailedToConnect(this, RoomException.ConnectException("server didn't return any participants"))
+            return
+        }
+
         val lp = LocalParticipant(response.participant, engine)
         lp.listener = this
         localParticipant = lp
-        }
         if (response.otherParticipantsList.isNotEmpty()) {
             response.otherParticipantsList.forEach {
                 getOrCreateRemoteParticipant(it.sid, it)
@@ -190,7 +167,6 @@ constructor(
 
         connectContinuation?.resume(Unit)
         connectContinuation = null
-        listener?.onConnect(this)
     }
 
     /**
@@ -218,11 +194,6 @@ constructor(
         participant.addSubscribedDataTrack(channel, trackSid, name)
     }
 
-    /**
-     * @suppress
-     */
-    override fun onPublishLocalTrack(cid: String, track: LivekitModels.TrackInfo) {
-    }
 
     /**
      * @suppress
@@ -231,8 +202,9 @@ constructor(
         for (info in updates) {
             val participantSid = info.sid
 
-            if(localParticipant?.sid == participantSid) {
-                localParticipant?.updateFromInfo(info)
+            if(localParticipant.sid == participantSid) {
+                localParticipant.updateFromInfo(info)
+                continue
             }
 
             val isNewParticipant = remoteParticipants.contains(participantSid)
@@ -272,12 +244,48 @@ constructor(
 
     //------------------------------- RemoteParticipant.Listener --------------------------------//
     /**
+     * This is called for both Local and Remote participants
      * @suppress
      */
     override fun onMetadataChanged(participant: Participant, prevMetadata: String?) {
-        listener?.onMetadataChanged(this, participant, prevMetadata)
+        listener?.onMetadataChanged(participant, prevMetadata, this)
+    }
+
+    override fun onTrackPublished(publication: TrackPublication, participant: RemoteParticipant) {
+        listener?.onTrackPublished(publication,  participant, this)
+    }
+
+    override fun onTrackUnpublished(publication: TrackPublication, participant: RemoteParticipant) {
+        listener?.onTrackUnpublished(publication,  participant, this)
+    }
+
+    override fun onTrackSubscribed(track: Track, publication: TrackPublication, participant: RemoteParticipant) {
+        listener?.onTrackSubscribed(track, publication, participant, this)
+    }
+
+    override fun onTrackSubscriptionFailed(
+        sid: String,
+        exception: Exception,
+        participant: RemoteParticipant
+    ) {
+        listener?.onTrackSubscriptionFailed(sid, exception, participant, this)
+    }
+
+    override fun onTrackUnsubscribed(
+        track: Track,
+        publication: TrackPublication,
+        participant: RemoteParticipant
+    ) {
+        listener?.onTrackUnsubscribed(track, publication, participant, this)
     }
 
+    override fun onDataReceived(
+        data: ByteBuffer,
+        dataTrack: DataTrack,
+        participant: RemoteParticipant
+    ) {
+        listener?.onDataReceived(data, dataTrack, participant, this)
+    }
 
     /**
      * @suppress
@@ -288,4 +296,86 @@ constructor(
         viewRenderer.setScalingType(RendererCommon.ScalingType.SCALE_ASPECT_FIT)
         viewRenderer.setEnableHardwareScaler(false /* enabled */);
     }
+
+    /**
+     * Room Listener, this class provides callbacks that clients should override.
+     *
+     */
+    interface Listener {
+        /**
+         * Disconnected from room
+         */
+        fun onDisconnect(room: Room, error: Exception?) {}
+
+        /**
+         * When a [RemoteParticipant] joins after the local participant. It will not emit events
+         * for participants that are already in the room
+         */
+        fun onParticipantConnected(room: Room, participant: RemoteParticipant) {}
+
+        /**
+         * When a [RemoteParticipant] leaves after the local participant has joined.
+         */
+        fun onParticipantDisconnected(room: Room, participant: RemoteParticipant) {}
+
+        /**
+         * Could not connect to the room
+         */
+        fun onFailedToConnect(room: Room, error: Exception) {}
+//        fun onReconnecting(room: Room, error: Exception) {}
+//        fun onReconnect(room: Room) {}
+
+        /**
+         * Active speakers changed. List of speakers are ordered by their audio level. loudest
+         * speakers first. This will include the [LocalParticipant] too.
+         */
+        fun onActiveSpeakersChanged(speakers: List<Participant>, room: Room) {}
+
+        // Participant callbacks
+        /**
+         * Participant metadata is a simple way for app-specific state to be pushed to all users.
+         * When RoomService.UpdateParticipantMetadata is called to change a participant's state,
+         * this event will be fired for all clients in the room.
+         */
+        fun onMetadataChanged(Participant: Participant, prevMetadata: String?, room: Room) {}
+
+        /**
+         * When a new track is published to room after the local participant has joined. It will
+         * not fire for tracks that are already published
+         */
+        fun onTrackPublished(publication: TrackPublication, participant: RemoteParticipant, room: Room) {}
+
+        /**
+         * A [RemoteParticipant] has unpublished a track
+         */
+        fun onTrackUnpublished(publication: TrackPublication, participant: RemoteParticipant, room: Room) {}
+
+        /**
+         * The [LocalParticipant] has subscribed to a new track. This event will always fire as
+         * long as new tracks are ready for use.
+         */
+        fun onTrackSubscribed(track: Track, publication: TrackPublication, participant: RemoteParticipant, room: Room) {}
+
+        /**
+         * Could not subscribe to a track
+         */
+        fun onTrackSubscriptionFailed(sid: String, exception: Exception, participant: RemoteParticipant, room: Room) {}
+
+        /**
+         * A subscribed track is no longer available. Clients should listen to this event and ensure
+         * the track removes all renderers
+         */
+        fun onTrackUnsubscribed(track: Track, publications: TrackPublication, participant: RemoteParticipant, room: Room) {}
+
+        /**
+         * Message received over a [DataTrack]
+         */
+        fun onDataReceived(data: ByteBuffer, dataTrack: DataTrack, participant: RemoteParticipant, room: Room) {}
+    }
+}
+
+sealed class RoomException(message: String? = null, cause: Throwable? = null) :
+    Exception(message, cause) {
+    class ConnectException(message: String? = null, cause: Throwable? = null) :
+        RoomException(message, cause)
 }
\ No newline at end of file

@@ -27,6 +27,8 @@ open class Participant(var sid: String, identity: String? = null) {
      * @suppress
      */
     fun addTrackPublication(publication: TrackPublication) {
+        val track = publication.track
+        track?.sid = publication.sid
         tracks[publication.sid] = publication
         when (publication.kind) {
             LivekitModels.TrackType.AUDIO -> audioTracks[publication.sid] = publication

@@ -15,7 +15,7 @@ import java.nio.ByteBuffer
 
 class RemoteParticipant(
     sid: String, name: String? = null
-) : Participant(sid, name), RemoteDataTrack.Listener {
+) : Participant(sid, name) {
     /**
      * @suppress
      */
@@ -31,8 +31,7 @@ class RemoteParticipant(
 
     private val coroutineScope = CloseableCoroutineScope(SupervisorJob())
 
-    fun getTrackPublication(sid: String): TrackPublication? =
-        tracks[sid]
+    fun getTrackPublication(sid: String): TrackPublication? = tracks[sid]
 
     /**
      * @suppress
@@ -62,7 +61,7 @@ class RemoteParticipant(
 
         if (hadInfo) {
             for (publication in newTrackPublications.values) {
-                listener?.onPublish(publication, this)
+                listener?.onTrackPublished(publication, this)
             }
         }
 
@@ -79,8 +78,8 @@ class RemoteParticipant(
     fun addSubscribedMediaTrack(mediaTrack: MediaStreamTrack, sid: String, triesLeft: Int = 20) {
         val publication = getTrackPublication(sid)
         val track: Track = when (val kind = mediaTrack.kind()) {
-            KIND_AUDIO -> RemoteAudioTrack(sid = sid, mediaTrack = mediaTrack as AudioTrack, name = "")
-            KIND_VIDEO -> RemoteVideoTrack(sid = sid, mediaTrack = mediaTrack as VideoTrack, name = "")
+            KIND_AUDIO -> AudioTrack(rtcTrack = mediaTrack as AudioTrack, name = "")
+            KIND_VIDEO -> VideoTrack(rtcTrack = mediaTrack as VideoTrack, name = "")
             else -> throw TrackException.InvalidTrackTypeException("invalid track type: $kind")
         }
 
@@ -90,7 +89,7 @@ class RemoteParticipant(
                 val exception = TrackException.InvalidTrackStateException(message)
                 Timber.e { "remote participant ${this.sid} --- $message" }
 
-                listener?.onFailToSubscribe(sid, exception, this)
+                listener?.onTrackSubscriptionFailed(sid, exception, this)
             } else {
                 coroutineScope.launch {
                     delay(150)
@@ -100,14 +99,14 @@ class RemoteParticipant(
             return
         }
 
-        val remoteTrack = track as RemoteTrack
         publication.track = track
         track.name = publication.name
-        remoteTrack.sid = publication.sid
+        track.sid = publication.sid
+        addTrackPublication(publication)
 
         // TODO: how does mediatrack send ended event?
 
-        listener?.onSubscribe(track, publication, this)
+        listener?.onTrackSubscribed(track, publication, this)
     }
 
     /**
@@ -117,20 +116,19 @@ class RemoteParticipant(
         val track = DataTrack(name, dataChannel)
         var publication = getTrackPublication(sid)
 
-        if (publication != null) {
-            publication.track = track
-        } else {
+        if (publication == null) {
             val trackInfo = LivekitModels.TrackInfo.newBuilder()
                 .setSid(sid)
                 .setName(name)
                 .setType(LivekitModels.TrackType.DATA)
                 .build()
-            publication = TrackPublication(info = trackInfo, track = track)
+            publication = TrackPublication(info = trackInfo)
             addTrackPublication(publication)
             if (hasInfo) {
-                listener?.onPublish(publication, this)
+                listener?.onTrackPublished(publication, this)
             }
         }
+        publication.track = track
 
         dataChannel.registerObserver(object : DataChannel.Observer {
             override fun onBufferedAmountChange(previousAmount: Long) {}
@@ -139,15 +137,15 @@ class RemoteParticipant(
                 val newState = dataChannel.state()
                 if (newState == DataChannel.State.CLOSED) {
                     publication.track = null
-                    listener?.onUnsubscribe(track, publication, this@RemoteParticipant)
+                    listener?.onTrackUnsubscribed(track, publication, this@RemoteParticipant)
                 }
             }
 
             override fun onMessage(buffer: DataChannel.Buffer) {
-                listener?.onReceive(buffer.data, track, this@RemoteParticipant)
+                listener?.onDataReceived(buffer.data, track, this@RemoteParticipant)
             }
         })
-        listener?.onSubscribe(track, publication, participant = this)
+        listener?.onTrackSubscribed(track, publication, participant = this)
     }
 
     fun unpublishTrack(trackSid: String, sendUnpublish: Boolean = false) {
@@ -162,57 +160,49 @@ class RemoteParticipant(
         val track = publication.track
         if (track != null) {
             track.stop()
-            listener?.onUnsubscribe(track, publication, this)
+            listener?.onTrackUnsubscribed(track, publication, this)
         }
         if (sendUnpublish) {
-            listener?.onUnpublish(publication, this)
+            listener?.onTrackUnpublished(publication, this)
         }
     }
 
-    override fun onReceiveString(message: String, dataTrack: DataTrack) {
-        TODO("Not yet implemented")
-    }
-
-    override fun onReceiveData(message: DataChannel.Buffer, dataTrack: DataTrack) {
-        TODO("Not yet implemented")
-    }
-
     companion object {
         private const val KIND_AUDIO = "audio"
         private const val KIND_VIDEO = "video"
     }
 
     interface Listener: Participant.Listener {
-        fun onPublish(publication: TrackPublication, participant: RemoteParticipant) {}
-        fun onUnpublish(publication: TrackPublication, participant: RemoteParticipant) {}
+        fun onTrackPublished(publication: TrackPublication, participant: RemoteParticipant) {}
+        fun onTrackUnpublished(publication: TrackPublication, participant: RemoteParticipant) {}
 
         fun onEnable(publication: TrackPublication, participant: RemoteParticipant) {}
         fun onDisable(publication: TrackPublication, participant: RemoteParticipant) {}
 
-        fun onSubscribe(track: Track, publication: TrackPublication, participant: RemoteParticipant) {}
-        fun onFailToSubscribe(
+        fun onTrackSubscribed(track: Track, publication: TrackPublication, participant: RemoteParticipant) {}
+        fun onTrackSubscriptionFailed(
             sid: String,
             exception: Exception,
             participant: RemoteParticipant
         ) {
         }
 
-        fun onUnsubscribe(
+        fun onTrackUnsubscribed(
             track: Track,
-            publications: TrackPublication,
+            publication: TrackPublication,
             participant: RemoteParticipant
         ) {
         }
 
-        fun onReceive(
+        fun onDataReceived(
             data: ByteBuffer,
             dataTrack: DataTrack,
             participant: RemoteParticipant
         ) {
         }
 
-        fun switchedOffVideo(track: RemoteVideoTrack, participant: RemoteParticipant) {}
-        fun switchedOnVideo(track: RemoteVideoTrack, participant: RemoteParticipant) {}
+        fun switchedOffVideo(track: VideoTrack, publication: TrackPublication, participant: RemoteParticipant) {}
+        fun switchedOnVideo(track: VideoTrack, publication: TrackPublication, participant: RemoteParticipant) {}
     }
 
 }
\ No newline at end of file

@@ -7,8 +7,6 @@ import java.util.*
 class LocalDataTrack(
     val options: DataTrackOptions
 ) : DataTrack(options.name) {
-    var sid: String? = null
-        internal set
     var cid: String = UUID.randomUUID().toString()
 
     fun sendString(message: String) {

-package io.livekit.android.room.track
-
-class RemoteAudioTrack(
-    sid: String,
-    playbackEnabled: Boolean = true,
-    name: String,
-    mediaTrack: org.webrtc.AudioTrack
-) : AudioTrack(name, mediaTrack), RemoteTrack {
-
-    override var sid: String = sid
-    var playbackEnabled = playbackEnabled
-        internal set
-
-}
\ No newline at end of file

-package io.livekit.android.room.track
-
-import org.webrtc.DataChannel
-
-class RemoteDataTrack(
-    override var sid: String,
-    name: String,
-    rtcTrack: DataChannel
-) :
-    DataTrack(name, rtcTrack),
-    RemoteTrack {
-
-    var listener: Listener? = null
-
-    interface Listener {
-        fun onReceiveString(message: String, dataTrack: DataTrack)
-        fun onReceiveData(message: DataChannel.Buffer, dataTrack: DataTrack)
-    }
-}
\ No newline at end of file

-package io.livekit.android.room.track
-
-interface RemoteTrack {
-    var sid: String
-}
\ No newline at end of file

-package io.livekit.android.room.track
-
-class RemoteVideoTrack(
-    override var sid: String,
-    var switchedOff: Boolean = false,
-    name: String,
-    mediaTrack: org.webrtc.VideoTrack
-) : VideoTrack(name, mediaTrack), RemoteTrack

@@ -10,6 +10,8 @@ open class Track(name: String, kind: LivekitModels.TrackType) {
     var kind = kind
         internal set
     var state: State = State.NONE
+    var sid: String? = null
+        internal set
 
     enum class State {
         ENDED, LIVE, NONE;

@@ -34,10 +34,6 @@ class CallViewModel(
                 token,
                 ConnectOptions(false),
                 object : Room.Listener {
-                    override fun onConnect(room: Room) {
-                        updateParticipants(room)
-                    }
-
                     override fun onDisconnect(room: Room, error: Exception?) {
                     }
 
@@ -58,25 +54,15 @@ class CallViewModel(
                     override fun onFailedToConnect(room: Room, error: Exception) {
                     }
 
-                    override fun onReconnecting(room: Room, error: Exception) {
-                    }
-
-                    override fun onReconnect(room: Room) {
-                        updateParticipants(room)
-                    }
-
                     override fun onActiveSpeakersChanged(speakers: List<Participant>, room: Room) {
                     }
 
-                    override fun onMetadataChanged(
-                        room: Room,
-                        Participant: Participant,
-                        prevMetadata: String?
-                    ) {
+                    override fun onMetadataChanged(Participant: Participant, prevMetadata: String?, room: Room) {
 
                     }
                 }
             )
+            updateParticipants(mutableRoom.value!!)
         }
     }
 

@@ -28,7 +28,7 @@ class ParticipantItem(
         viewBinding.run {
 
             remoteParticipant.listener = object : RemoteParticipant.Listener {
-                override fun onSubscribe(
+                override fun onTrackSubscribed(
                     track: Track,
                     publication: TrackPublication,
                     participant: RemoteParticipant