/// <summary>
/// Attaches a call to the hold context.
/// </summary>
/// <param name="call"></param>
public async Task HoldAsync(AudioVideoCall call)
{
if (call.State == CallState.Terminating ||
call.State == CallState.Terminated)
return;
// accept the call if not accepted yet
if (call.State != CallState.Established)
await call.AcceptAsync();
// start audio on first call
if (musicPlayer.AudioVideoFlows.Count == 0)
await StartAudioAsync();
// put the call on hold and attach player
await call.Flow.HoldAsync(HoldType.RemoteEndpointMusicOnHold);
musicPlayer.AttachFlow(call.Flow);
}
/// <summary>
/// Attempt to transfer the call to the given destination with the set transfer type.
/// </summary>
/// <param name="call"></param>
/// <param name="callToReplace"></param>
/// <param name="transferType"></param>
/// <returns></returns>
async Task<bool> TransferAsync(AudioVideoCall call, AudioVideoCall callToReplace)
{
try
{
// accept call if not accepted
if (call.State != CallState.Established)
await call.AcceptAsync();
// transfer to answered endpoint
await call.TransferAsync(callToReplace, new CallTransferOptions(CallTransferType.Attended));
return true;
}
catch (RealTimeException)
{
return false;
}
}