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using System.Threading;
using MediaBrowser.Controller.Session;
using MediaBrowser.Model.SyncPlay;
using Microsoft.Extensions.Logging;
namespace MediaBrowser.Controller.SyncPlay
{
/// <summary>
/// Class AbstractGroupState.
/// </summary>
/// <remarks>
/// Class is not thread-safe, external locking is required when accessing methods.
/// </remarks>
public abstract class AbstractGroupState : ISyncPlayState
{
/// <summary>
/// The logger.
/// </summary>
protected readonly ILogger _logger;
/// <summary>
/// Default constructor.
/// </summary>
public AbstractGroupState(ILogger logger)
{
_logger = logger;
}
/// <summary>
/// Sends a group state update to all group.
/// </summary>
/// <param name="context">The context of the state.</param>
/// <param name="reason">The reason of the state change.</param>
/// <param name="session">The session.</param>
/// <param name="cancellationToken">The cancellation token.</param>
protected void SendGroupStateUpdate(ISyncPlayStateContext context, IPlaybackGroupRequest reason, SessionInfo session, CancellationToken cancellationToken)
{
// Notify relevant state change event
var stateUpdate = new GroupStateUpdate()
{
State = GetGroupState(),
Reason = reason.GetRequestType()
};
var update = context.NewSyncPlayGroupUpdate(GroupUpdateType.StateUpdate, stateUpdate);
context.SendGroupUpdate(session, SyncPlayBroadcastType.AllGroup, update, cancellationToken);
}
/// <inheritdoc />
public abstract GroupState GetGroupState();
/// <inheritdoc />
public abstract void SessionJoined(ISyncPlayStateContext context, GroupState prevState, SessionInfo session, CancellationToken cancellationToken);
/// <inheritdoc />
public abstract void SessionLeaving(ISyncPlayStateContext context, GroupState prevState, SessionInfo session, CancellationToken cancellationToken);
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, IPlaybackGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, PlayGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, SetPlaylistItemGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
var waitingState = new WaitingGroupState(_logger);
context.SetState(waitingState);
waitingState.HandleRequest(context, GetGroupState(), request, session, cancellationToken);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, RemoveFromPlaylistGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
var playingItemRemoved = context.RemoveFromPlayQueue(request.PlaylistItemIds);
var playQueueUpdate = context.GetPlayQueueUpdate(PlayQueueUpdateReason.RemoveItems);
var update = context.NewSyncPlayGroupUpdate(GroupUpdateType.PlayQueue, playQueueUpdate);
context.SendGroupUpdate(session, SyncPlayBroadcastType.AllGroup, update, cancellationToken);
if (playingItemRemoved)
{
var PlayingItemIndex = context.PlayQueue.PlayingItemIndex;
if (context.PlayQueue.PlayingItemIndex == -1)
{
_logger.LogDebug("HandleRequest: {0} in group {1}, play queue is empty.", request.GetRequestType(), context.GroupId.ToString());
ISyncPlayState idleState = new IdleGroupState(_logger);
context.SetState(idleState);
var stopRequest = new StopGroupRequest();
idleState.HandleRequest(context, GetGroupState(), stopRequest, session, cancellationToken);
}
}
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, MovePlaylistItemGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
var result = context.MoveItemInPlayQueue(request.PlaylistItemId, request.NewIndex);
if (!result)
{
_logger.LogError("HandleRequest: {0} in group {1}, unable to move item in play queue.", request.GetRequestType(), context.GroupId.ToString());
return;
}
var playQueueUpdate = context.GetPlayQueueUpdate(PlayQueueUpdateReason.MoveItem);
var update = context.NewSyncPlayGroupUpdate(GroupUpdateType.PlayQueue, playQueueUpdate);
context.SendGroupUpdate(session, SyncPlayBroadcastType.AllGroup, update, cancellationToken);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, QueueGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
var result = context.AddToPlayQueue(request.ItemIds, request.Mode);
if (!result)
{
_logger.LogError("HandleRequest: {0} in group {1}, unable to add items to play queue.", request.GetRequestType(), context.GroupId.ToString());
return;
}
var reason = request.Mode.Equals("next") ? PlayQueueUpdateReason.QueueNext : PlayQueueUpdateReason.Queue;
var playQueueUpdate = context.GetPlayQueueUpdate(reason);
var update = context.NewSyncPlayGroupUpdate(GroupUpdateType.PlayQueue, playQueueUpdate);
context.SendGroupUpdate(session, SyncPlayBroadcastType.AllGroup, update, cancellationToken);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, UnpauseGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, PauseGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, StopGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, SeekGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, BufferGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, ReadyGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, NextTrackGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, PreviousTrackGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
UnhandledRequest(request);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, SetRepeatModeGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
context.SetRepeatMode(request.Mode);
var playQueueUpdate = context.GetPlayQueueUpdate(PlayQueueUpdateReason.RepeatMode);
var update = context.NewSyncPlayGroupUpdate(GroupUpdateType.PlayQueue, playQueueUpdate);
context.SendGroupUpdate(session, SyncPlayBroadcastType.AllGroup, update, cancellationToken);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, SetShuffleModeGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
context.SetShuffleMode(request.Mode);
var playQueueUpdate = context.GetPlayQueueUpdate(PlayQueueUpdateReason.ShuffleMode);
var update = context.NewSyncPlayGroupUpdate(GroupUpdateType.PlayQueue, playQueueUpdate);
context.SendGroupUpdate(session, SyncPlayBroadcastType.AllGroup, update, cancellationToken);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, PingGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
// Collected pings are used to account for network latency when unpausing playback
context.UpdatePing(session, request.Ping);
}
/// <inheritdoc />
public virtual void HandleRequest(ISyncPlayStateContext context, GroupState prevState, IgnoreWaitGroupRequest request, SessionInfo session, CancellationToken cancellationToken)
{
context.SetIgnoreGroupWait(session, request.IgnoreWait);
}
private void UnhandledRequest(IPlaybackGroupRequest request)
{
_logger.LogWarning("HandleRequest: unhandled {0} request for {1} state.", request.GetRequestType(), this.GetGroupState());
}
}
}
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