/// <summary>
/// Connects this Lavalink node to specified Discord channel.
/// </summary>
/// <param name="channel">Voice channel to connect to.</param>
/// <returns>Channel connection, which allows for playback control.</returns>
public async Task <LavalinkGuildConnection> ConnectAsync(DiscordChannel channel)
{
if (this._connectedGuilds.ContainsKey(channel.Guild.Id))
{
return(this._connectedGuilds[channel.Guild.Id]);
}
if (channel.Guild == null || channel.Type != ChannelType.Voice)
{
throw new ArgumentException("Invalid channel specified.", nameof(channel));
}
var vstut = new TaskCompletionSource <VoiceStateUpdateEventArgs>();
var vsrut = new TaskCompletionSource <VoiceServerUpdateEventArgs>();
this.VoiceStateUpdates[channel.Guild.Id] = vstut;
this.VoiceServerUpdates[channel.Guild.Id] = vsrut;
var vsd = new VoiceDispatch
{
OpCode = 4,
Payload = new VoiceStateUpdatePayload
{
GuildId = channel.Guild.Id,
ChannelId = channel.Id,
Deafened = false,
Muted = false
}
};
var vsj = JsonConvert.SerializeObject(vsd, Formatting.None);
await(channel.Discord as DiscordClient).WsSendAsync(vsj).ConfigureAwait(false);
var vstu = await vstut.Task.ConfigureAwait(false);
var vsru = await vsrut.Task.ConfigureAwait(false);
await this.SendPayloadAsync(new LavalinkVoiceUpdate(vstu, vsru)).ConfigureAwait(false);
var con = new LavalinkGuildConnection(this, channel, vstu);
con.ChannelDisconnected += this.Con_ChannelDisconnected;
con.PlayerUpdated += (s, e) => this._playerUpdated.InvokeAsync(s, e);
con.PlaybackStarted += (s, e) => this._playbackStarted.InvokeAsync(s, e);
con.PlaybackFinished += (s, e) => this._playbackFinished.InvokeAsync(s, e);
con.TrackStuck += (s, e) => this._trackStuck.InvokeAsync(s, e);
con.TrackException += (s, e) => this._trackException.InvokeAsync(s, e);
this._connectedGuilds[channel.Guild.Id] = con;
return(con);
}
private void Con_ChannelDisconnected(LavalinkGuildConnection con) => this._connectedGuilds.TryRemove(con.GuildId, out _);