First POC with working playback

Jellyfin.Plugin.JellyLMS/Models/LmsApiModels.cs

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+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+namespace Jellyfin.Plugin.JellyLMS.Models;
+
+/// <summary>
+/// JSON-RPC request for LMS API.
+/// </summary>
+public class LmsJsonRpcRequest
+{
+    /// <summary>
+    /// Gets or sets the request ID.
+    /// </summary>
+    [JsonPropertyName("id")]
+    public int Id { get; set; } = 1;
+
+    /// <summary>
+    /// Gets or sets the method name (always "slim.request").
+    /// </summary>
+    [JsonPropertyName("method")]
+    public string Method { get; set; } = "slim.request";
+
+    /// <summary>
+    /// Gets or sets the parameters [playerMac, [command, args...]].
+    /// </summary>
+    [JsonPropertyName("params")]
+    public object[] Params { get; set; } = [];
+}
+
+/// <summary>
+/// JSON-RPC response from LMS API.
+/// </summary>
+/// <typeparam name="T">The result type.</typeparam>
+public class LmsJsonRpcResponse<T>
+{
+    /// <summary>
+    /// Gets or sets the request ID.
+    /// </summary>
+    [JsonPropertyName("id")]
+    public int Id { get; set; }
+
+    /// <summary>
+    /// Gets or sets the result data.
+    /// </summary>
+    [JsonPropertyName("result")]
+    public T? Result { get; set; }
+
+    /// <summary>
+    /// Gets or sets any error message.
+    /// </summary>
+    [JsonPropertyName("error")]
+    public string? Error { get; set; }
+}
+
+/// <summary>
+/// Player count response.
+/// </summary>
+public class PlayerCountResult
+{
+    /// <summary>
+    /// Gets or sets the count value.
+    /// </summary>
+    [JsonPropertyName("_count")]
+    public int Count { get; set; }
+}
+
+/// <summary>
+/// Players list response.
+/// </summary>
+public class PlayersListResult
+{
+    /// <summary>
+    /// Gets or sets the player count.
+    /// </summary>
+    [JsonPropertyName("count")]
+    public int Count { get; set; }
+
+    /// <summary>
+    /// Gets or sets the list of players.
+    /// </summary>
+    [JsonPropertyName("players_loop")]
+    public List<LmsPlayerInfo> Players { get; set; } = [];
+}
+
+/// <summary>
+/// Player info from LMS API.
+/// </summary>
+public class LmsPlayerInfo
+{
+    /// <summary>
+    /// Gets or sets the player name.
+    /// </summary>
+    [JsonPropertyName("name")]
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the player ID (MAC address).
+    /// </summary>
+    [JsonPropertyName("playerid")]
+    public string PlayerId { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the player IP address.
+    /// </summary>
+    [JsonPropertyName("ip")]
+    public string Ip { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets whether the player is connected.
+    /// </summary>
+    [JsonPropertyName("connected")]
+    public int Connected { get; set; }
+
+    /// <summary>
+    /// Gets or sets the power state.
+    /// </summary>
+    [JsonPropertyName("power")]
+    public int Power { get; set; }
+
+    /// <summary>
+    /// Gets or sets the player model.
+    /// </summary>
+    [JsonPropertyName("model")]
+    public string Model { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the player model name.
+    /// </summary>
+    [JsonPropertyName("modelname")]
+    public string ModelName { get; set; } = string.Empty;
+}
+
+/// <summary>
+/// Player status response.
+/// </summary>
+public class PlayerStatusResult
+{
+    /// <summary>
+    /// Gets or sets the player name.
+    /// </summary>
+    [JsonPropertyName("player_name")]
+    public string PlayerName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the player connected state.
+    /// </summary>
+    [JsonPropertyName("player_connected")]
+    public int PlayerConnected { get; set; }
+
+    /// <summary>
+    /// Gets or sets the power state.
+    /// </summary>
+    [JsonPropertyName("power")]
+    public int Power { get; set; }
+
+    /// <summary>
+    /// Gets or sets the playback mode (play, pause, stop).
+    /// </summary>
+    [JsonPropertyName("mode")]
+    public string Mode { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the current time position in seconds.
+    /// </summary>
+    [JsonPropertyName("time")]
+    public double Time { get; set; }
+
+    /// <summary>
+    /// Gets or sets the mixer volume (0-100).
+    /// </summary>
+    [JsonPropertyName("mixer volume")]
+    public int Volume { get; set; }
+
+    /// <summary>
+    /// Gets or sets the total duration in seconds.
+    /// </summary>
+    [JsonPropertyName("duration")]
+    public double Duration { get; set; }
+
+    /// <summary>
+    /// Gets or sets the sync master MAC address.
+    /// </summary>
+    [JsonPropertyName("sync_master")]
+    public string? SyncMaster { get; set; }
+
+    /// <summary>
+    /// Gets or sets the list of synced player MACs.
+    /// </summary>
+    [JsonPropertyName("sync_slaves")]
+    public string? SyncSlaves { get; set; }
+
+    /// <summary>
+    /// Gets or sets the current track title.
+    /// </summary>
+    [JsonPropertyName("current_title")]
+    public string? CurrentTitle { get; set; }
+}
+
+/// <summary>
+/// LMS server status.
+/// </summary>
+public class LmsServerStatus
+{
+    /// <summary>
+    /// Gets or sets the server version.
+    /// </summary>
+    public string Version { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the player count.
+    /// </summary>
+    public int PlayerCount { get; set; }
+
+    /// <summary>
+    /// Gets or sets whether the server is reachable.
+    /// </summary>
+    public bool IsConnected { get; set; }
+
+    /// <summary>
+    /// Gets or sets the last error message.
+    /// </summary>
+    public string? LastError { get; set; }
+}
+
+/// <summary>
+/// Sync group information.
+/// </summary>
+public class SyncGroup
+{
+    /// <summary>
+    /// Gets or sets the master player MAC address.
+    /// </summary>
+    public string MasterMac { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the master player name.
+    /// </summary>
+    public string MasterName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the slave player MAC addresses.
+    /// </summary>
+    public List<string> SlaveMacs { get; set; } = [];
+
+    /// <summary>
+    /// Gets or sets the slave player names.
+    /// </summary>
+    public List<string> SlaveNames { get; set; } = [];
+
+    /// <summary>
+    /// Gets the total number of players in this sync group.
+    /// </summary>
+    public int PlayerCount => 1 + SlaveMacs.Count;
+}

Jellyfin.Plugin.JellyLMS/Models/LmsPlaybackSession.cs

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+using System;
+using System.Collections.Generic;
+
+namespace Jellyfin.Plugin.JellyLMS.Models;
+
+/// <summary>
+/// Represents the current playback state.
+/// </summary>
+public enum PlaybackState
+{
+    /// <summary>
+    /// Playback is stopped.
+    /// </summary>
+    Stopped,
+
+    /// <summary>
+    /// Playback is active.
+    /// </summary>
+    Playing,
+
+    /// <summary>
+    /// Playback is paused.
+    /// </summary>
+    Paused
+}
+
+/// <summary>
+/// Represents an active playback session bridging Jellyfin to LMS.
+/// </summary>
+public class LmsPlaybackSession
+{
+    /// <summary>
+    /// Gets or sets the unique session identifier.
+    /// </summary>
+    public string SessionId { get; set; } = Guid.NewGuid().ToString();
+
+    /// <summary>
+    /// Gets or sets the Jellyfin session ID.
+    /// </summary>
+    public string? JellyfinSessionId { get; set; }
+
+    /// <summary>
+    /// Gets or sets the Jellyfin item ID being played.
+    /// </summary>
+    public Guid ItemId { get; set; }
+
+    /// <summary>
+    /// Gets or sets the item name for display.
+    /// </summary>
+    public string ItemName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the artist name (for audio).
+    /// </summary>
+    public string? Artist { get; set; }
+
+    /// <summary>
+    /// Gets or sets the album name (for audio).
+    /// </summary>
+    public string? Album { get; set; }
+
+    /// <summary>
+    /// Gets or sets the MAC addresses of LMS players in this session.
+    /// </summary>
+    public List<string> PlayerMacs { get; set; } = [];
+
+    /// <summary>
+    /// Gets or sets the current playback state.
+    /// </summary>
+    public PlaybackState State { get; set; } = PlaybackState.Stopped;
+
+    /// <summary>
+    /// Gets or sets the current playback position in ticks.
+    /// </summary>
+    public long PositionTicks { get; set; }
+
+    /// <summary>
+    /// Gets or sets the total runtime in ticks.
+    /// </summary>
+    public long RuntimeTicks { get; set; }
+
+    /// <summary>
+    /// Gets or sets when this session started.
+    /// </summary>
+    public DateTime StartedAt { get; set; } = DateTime.UtcNow;
+
+    /// <summary>
+    /// Gets or sets the audio stream URL being played on LMS.
+    /// </summary>
+    public string? StreamUrl { get; set; }
+
+    /// <summary>
+    /// Gets or sets the Jellyfin user ID who initiated playback.
+    /// </summary>
+    public Guid? UserId { get; set; }
+}

Jellyfin.Plugin.JellyLMS/Models/LmsPlayer.cs

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+using System.Collections.Generic;
+
+namespace Jellyfin.Plugin.JellyLMS.Models;
+
+/// <summary>
+/// Represents an LMS player/zone.
+/// </summary>
+public class LmsPlayer
+{
+    /// <summary>
+    /// Gets or sets the player's display name.
+    /// </summary>
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the player's MAC address (unique identifier).
+    /// </summary>
+    public string MacAddress { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the player's IP address.
+    /// </summary>
+    public string IpAddress { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets a value indicating whether the player is connected to LMS.
+    /// </summary>
+    public bool IsConnected { get; set; }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether the player is powered on.
+    /// </summary>
+    public bool IsPoweredOn { get; set; }
+
+    /// <summary>
+    /// Gets or sets the player's current volume (0-100).
+    /// </summary>
+    public int Volume { get; set; }
+
+    /// <summary>
+    /// Gets or sets the player model name.
+    /// </summary>
+    public string Model { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the MAC address of the sync master, if this player is synced.
+    /// </summary>
+    public string? SyncMaster { get; set; }
+
+    /// <summary>
+    /// Gets or sets the list of synced player MAC addresses (if this is a sync master).
+    /// </summary>
+    public List<string> SyncSlaves { get; set; } = [];
+
+    /// <summary>
+    /// Gets a value indicating whether this player is part of a sync group.
+    /// </summary>
+    public bool IsSynced => !string.IsNullOrEmpty(SyncMaster) || SyncSlaves.Count > 0;
+}