59 lines
2.7 KiB
C#
59 lines
2.7 KiB
C#
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namespace MusicBridge.Agent.Media;
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internal sealed record MediaCommand(string Type, double? Value = null, string? Id = null);
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internal sealed record CommandResult(bool Success, string Code, string Message, string? Id = null);
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internal sealed record PlayerCapabilities(bool Play = false, bool Pause = false,
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bool Toggle = false, bool Next = false, bool Previous = false, bool Seek = false);
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internal sealed record MediaState
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{
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public int ProtocolVersion { get; init; } = 1;
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public DateTimeOffset Timestamp { get; init; } = DateTimeOffset.UtcNow;
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public bool HasSession { get; init; }
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public string Title { get; init; } = "";
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public string Artist { get; init; } = "";
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public string Source { get; init; } = "";
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public string PlaybackStatus { get; init; } = "Closed";
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public double PositionSeconds { get; init; }
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public double StartSeconds { get; init; }
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public double EndSeconds { get; init; }
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public double MinSeekSeconds { get; init; }
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public double MaxSeekSeconds { get; init; }
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public double PlaybackRate { get; init; } = 1;
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public PlayerCapabilities Capabilities { get; init; } = new();
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public float? Volume { get; init; }
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public bool? Muted { get; init; }
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public string? MediaError { get; init; }
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public string? VolumeError { get; init; }
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public string? ArtworkId { get; init; }
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public string? ArtworkError { get; init; }
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}
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internal interface IMediaService
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{
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event Action? Changed;
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Artwork? GetArtwork(string id);
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Task<MediaState> ReadAsync(CancellationToken cancellationToken);
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Task<CommandResult> ExecuteAsync(MediaCommand command, CancellationToken cancellationToken);
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}
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internal static class CommandValidation
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{
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public static CommandResult? Validate(MediaCommand command)
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{
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if (command.Id?.Length > 64) return Error("invalid_command", "Id длиннее 64 символов.");
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var valid = command.Type switch
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{
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"play" or "pause" or "toggle" or "next" or "previous" or "toggleMute" => command.Value is null,
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"seek" => command.Value is double s && double.IsFinite(s) && s >= 0 && s <= TimeSpan.MaxValue.TotalSeconds / 2,
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"seekRelative" => command.Value is double d && double.IsFinite(d) && Math.Abs(d) <= 3600,
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"volume" => command.Value is double v && double.IsFinite(v) && v >= 0 && v <= 1,
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"volumeRelative" => command.Value is double d && double.IsFinite(d) && Math.Abs(d) <= 1,
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_ => false
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};
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return valid ? null : Error("invalid_command", "Неизвестная команда или недопустимое значение.");
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}
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public static CommandResult Error(string code, string message) => new(false, code, message);
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}
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