CallViewModel.kt
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package io.livekit.android.composesample
import android.app.Application
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.viewModelScope
import com.github.ajalt.timberkt.Timber
import io.livekit.android.ConnectOptions
import io.livekit.android.LiveKit
import io.livekit.android.room.Room
import io.livekit.android.room.RoomListener
import io.livekit.android.room.participant.Participant
import io.livekit.android.room.participant.RemoteParticipant
import io.livekit.android.room.track.LocalAudioTrack
import io.livekit.android.room.track.LocalVideoTrack
import kotlinx.coroutines.launch
class CallViewModel(
val url: String,
val token: String,
application: Application
) : AndroidViewModel(application), RoomListener {
private val mutableRoom = MutableLiveData<Room>()
val room: LiveData<Room> = mutableRoom
private val mutableRemoteParticipants = MutableLiveData<List<RemoteParticipant>>()
val remoteParticipants: LiveData<List<RemoteParticipant>> = mutableRemoteParticipants
private var localAudioTrack: LocalAudioTrack? = null
private var localVideoTrack: LocalVideoTrack? = null
private val mutableMicEnabled = MutableLiveData(true)
val micEnabled = mutableMicEnabled.hide()
private val mutableVideoEnabled = MutableLiveData(true)
val videoEnabled = mutableVideoEnabled.hide()
private val mutableFlipVideoButtonEnabled = MutableLiveData(true)
val flipButtonVideoEnabled = mutableFlipVideoButtonEnabled.hide()
init {
viewModelScope.launch {
val room = LiveKit.connect(
application,
url,
token,
ConnectOptions(),
this@CallViewModel
)
val localParticipant = room.localParticipant
val audioTrack = localParticipant.createAudioTrack()
localParticipant.publishAudioTrack(audioTrack)
this@CallViewModel.localAudioTrack = audioTrack
mutableMicEnabled.postValue(audioTrack.enabled)
val videoTrack = localParticipant.createVideoTrack()
localParticipant.publishVideoTrack(videoTrack)
videoTrack.startCapture()
this@CallViewModel.localVideoTrack = videoTrack
mutableVideoEnabled.postValue(videoTrack.enabled)
updateParticipants(room)
mutableRoom.value = room
}
}
private fun updateParticipants(room: Room) {
mutableRemoteParticipants.postValue(
room.remoteParticipants
.keys
.sortedBy { it }
.mapNotNull { room.remoteParticipants[it] }
)
}
override fun onCleared() {
super.onCleared()
mutableRoom.value?.disconnect()
}
override fun onDisconnect(room: Room, error: Exception?) {
}
override fun onParticipantConnected(
room: Room,
participant: RemoteParticipant
) {
updateParticipants(room)
}
override fun onParticipantDisconnected(
room: Room,
participant: RemoteParticipant
) {
updateParticipants(room)
}
override fun onFailedToConnect(room: Room, error: Exception) {
}
override fun onActiveSpeakersChanged(speakers: List<Participant>, room: Room) {
Timber.i { "active speakers changed ${speakers.count()}" }
}
override fun onMetadataChanged(participant: Participant, prevMetadata: String?, room: Room) {
Timber.i { "Participant metadata changed: ${participant.identity}" }
}
fun setMicEnabled(enabled: Boolean) {
localAudioTrack?.enabled = enabled
mutableMicEnabled.postValue(enabled)
}
fun setVideoEnabled(enabled: Boolean) {
localVideoTrack?.enabled = enabled
mutableVideoEnabled.postValue(enabled)
}
fun flipVideo() {
// TODO
}
}
private fun <T> LiveData<T>.hide(): LiveData<T> = this