protected void SendGroupStateUpdate(IGroupStateContext context, IGroupPlaybackRequest reason, SessionInfo session, CancellationToken cancellationToken)
{
// Notify relevant state change event.
var stateUpdate = new GroupStateUpdate(Type, reason.Action);
var update = context.NewSyncPlayGroupUpdate(GroupUpdateType.StateUpdate, stateUpdate);
context.SendGroupUpdate(session, SyncPlayBroadcastType.AllGroup, update, cancellationToken);
}
/// <inheritdoc />
public void HandleRequest(SessionInfo session, IGroupPlaybackRequest request, CancellationToken cancellationToken)
{
if (session == null)
{
throw new InvalidOperationException("Session is null!");
}
if (request == null)
{
throw new InvalidOperationException("Request is null!");
}
if (_sessionToGroupMap.TryGetValue(session.Id, out var group))
{
// Group lock required as Group is not thread-safe.
lock (group)
{
// Make sure that session still belongs to this group.
if (_sessionToGroupMap.TryGetValue(session.Id, out var checkGroup) && !checkGroup.GroupId.Equals(group.GroupId))
{
// Drop request.
return;
}
// Drop request if group is empty.
if (group.IsGroupEmpty())
{
return;
}
// Apply requested changes to group.
group.HandleRequest(session, request, cancellationToken);
}
}
else
{
_logger.LogWarning("Session {SessionId} does not belong to any group.", session.Id);
var error = new GroupUpdate <string>(Guid.Empty, GroupUpdateType.NotInGroup, string.Empty);
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
}
}
public virtual void HandleRequest(IGroupPlaybackRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
private void UnhandledRequest(IGroupPlaybackRequest request)
{
_logger.LogWarning("Unhandled request of type {RequestType} in {StateType} state.", request.Action, Type);
}
