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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 PausedGroupState.
/// </summary>
/// <remarks>
/// Class is not thread-safe, external locking is required when accessing methods.
/// </remarks>
public class PausedGroupState : AbstractGroupState
{
/// <summary>
/// Initializes a new instance of the <see cref="PausedGroupState"/> class.
/// </summary>
/// <param name="loggerFactory">Instance of the <see cref="ILoggerFactory"/> interface.</param>
public PausedGroupState(ILoggerFactory loggerFactory)
: base(loggerFactory)
{
}
/// <inheritdoc />
public override GroupStateType Type { get; } = GroupStateType.Paused;
/// <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)
{
// Change state.
var playingState = new PlayingGroupState(LoggerFactory);
context.SetState(playingState);
playingState.HandleRequest(request, context, Type, session, cancellationToken);
}
/// <inheritdoc />
public override void HandleRequest(PauseGroupRequest request, IGroupStateContext context, GroupStateType prevState, SessionInfo session, CancellationToken cancellationToken)
{
if (!prevState.Equals(Type))
{
// Pause group and compute the media playback position.
var currentTime = DateTime.UtcNow;
var elapsedTime = currentTime - context.LastActivity;
context.LastActivity = currentTime;
// Elapsed time is negative if event happens
// during the delay added to account for latency.
// In this phase clients haven't started the playback yet.
// In other words, LastActivity is in the future,
// when playback unpause is supposed to happen.
// Seek only if playback actually started.
context.PositionTicks += Math.Max(elapsedTime.Ticks, 0);
var command = context.NewSyncPlayCommand(SendCommandType.Pause);
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.Pause);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, 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)
{
// 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))
{
// Client got lost, sending current state.
var command = context.NewSyncPlayCommand(SendCommandType.Pause);
context.SendCommand(session, SyncPlayBroadcastType.CurrentSession, command, cancellationToken);
}
else if (prevState.Equals(GroupStateType.Waiting))
{
// Sending current state to all clients.
var command = context.NewSyncPlayCommand(SendCommandType.Pause);
context.SendCommand(session, SyncPlayBroadcastType.AllGroup, command, cancellationToken);
// 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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