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#nullable disable
using System;
using System.Threading;
using MediaBrowser.Controller.Session;
using MediaBrowser.Controller.SyncPlay.PlaybackRequests;
using MediaBrowser.Model.SyncPlay;
using Microsoft.Extensions.Logging;
namespace MediaBrowser.Controller.SyncPlay.GroupStates
{
/// <summary>
/// Class PlayingGroupState.
/// </summary>
/// <remarks>
/// Class is not thread-safe, external locking is required when accessing methods.
/// </remarks>
public class PlayingGroupState : AbstractGroupState
{
/// <summary>
/// Initializes a new instance of the <see cref="PlayingGroupState"/> class.
/// </summary>
/// <param name="loggerFactory">Instance of the <see cref="ILoggerFactory"/> interface.</param>
public PlayingGroupState(ILoggerFactory loggerFactory)
: base(loggerFactory)
{
}
/// <inheritdoc />
public override GroupStateType Type { get; } = GroupStateType.Playing;
/// <summary>
/// Gets or sets a value indicating whether requests for buffering should be ignored.
/// </summary>
public bool IgnoreBuffering { get; set; }
/// <inheritdoc />
public override void SessionJoined(IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Wait for session to be ready.
var waitingState = new WaitingGroupState(LoggerFactory);
context.SetState(waitingState);
waitingState.SessionJoined(context, Type, session, cancellationToken);
}
/// <inheritdoc />
public override void SessionLeaving(IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Do nothing.
}
/// <inheritdoc />
public override void HandleRequest(PlayGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Change state.
var waitingState = new WaitingGroupState(LoggerFactory);
context.SetState(waitingState);
waitingState.HandleRequest(request, context, Type, session, cancellationToken);
}
/// <inheritdoc />
public override void HandleRequest(UnpauseGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
if (!prevState.Equals(Type))
{
// Pick a suitable time that accounts for latency.
var delayMillis = Math.Max(context.GetHighestPing() * 2, context.DefaultPing);
// Unpause group and set starting point in future.
// Clients will start playback at LastActivity (datetime) from PositionTicks (playback position).
// The added delay does not guarantee, of course, that the command will be received in time.
// Playback synchronization will mainly happen client side.
context.LastActivity = DateTime.UtcNow.AddMilliseconds(delayMillis);
var command = context.NewSyncPlayCommand(SendCommandType.Unpause);
context.SendCommand(session, SyncPlayBroadcastType.AllGroup, command, cancellationToken);
// Notify relevant state change event.
SendGroupStateUpdate(context, request, session, cancellationToken);
}
else
{
// Client got lost, sending current state.
var command = context.NewSyncPlayCommand(SendCommandType.Unpause);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
}
}
/// <inheritdoc />
public override void HandleRequest(PauseGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Change state.
var pausedState = new PausedGroupState(LoggerFactory);
context.SetState(pausedState);
pausedState.HandleRequest(request, context, Type, session, cancellationToken);
}
/// <inheritdoc />
public override void HandleRequest(StopGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Change state.
var idleState = new IdleGroupState(LoggerFactory);
context.SetState(idleState);
idleState.HandleRequest(request, context, Type, session, cancellationToken);
}
/// <inheritdoc />
public override void HandleRequest(SeekGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Change state.
var waitingState = new WaitingGroupState(LoggerFactory);
context.SetState(waitingState);
waitingState.HandleRequest(request, context, Type, session, cancellationToken);
}
/// <inheritdoc />
public override void HandleRequest(BufferGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
if (IgnoreBuffering)
{
return;
}
// Change state.
var waitingState = new WaitingGroupState(LoggerFactory);
context.SetState(waitingState);
waitingState.HandleRequest(request, context, Type, session, cancellationToken);
}
/// <inheritdoc />
public override void HandleRequest(ReadyGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
if (prevState.Equals(Type))
{
// Group was not waiting, make sure client has latest state.
var command = context.NewSyncPlayCommand(SendCommandType.Unpause);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
}
else if (prevState.Equals(GroupStateType.Waiting))
{
// Notify relevant state change event.
SendGroupStateUpdate(context, request, session, cancellationToken);
}
}
/// <inheritdoc />
public override void HandleRequest(NextItemGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Change state.
var waitingState = new WaitingGroupState(LoggerFactory);
context.SetState(waitingState);
waitingState.HandleRequest(request, context, Type, session, cancellationToken);
}
/// <inheritdoc />
public override void HandleRequest(PreviousItemGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
// Change state.
var waitingState = new WaitingGroupState(LoggerFactory);
context.SetState(waitingState);
waitingState.HandleRequest(request, context, Type, session, cancellationToken);
}
}
}
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