feat: add SeasonalsPlugin class and update manifest for version 1.4.0.0

Jellyfin.Plugin.Seasonals/SeasonalsPlugin.cs

@@ -0,0 +1,150 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.Loader;
+using Jellyfin.Plugin.Seasonals.Configuration;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Common.Plugins;
+using MediaBrowser.Model.Plugins;
+using MediaBrowser.Model.Serialization;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
+namespace Jellyfin.Plugin.Seasonals;
+
+/// <summary>
+/// The main plugin.
+/// </summary>
+public class SeasonalsPlugin : BasePlugin<PluginConfiguration>, IHasWebPages
+{
+    private readonly ScriptInjector _scriptInjector;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="Plugin"/> class.
+    /// </summary>
+    /// <param name="applicationPaths">Instance of the <see cref="IApplicationPaths"/> interface.</param>
+    /// <param name="xmlSerializer">Instance of the <see cref="IXmlSerializer"/> interface.</param>
+    /// <param name="loggerFactory">Instance of the <see cref="ILoggerFactory"/> interface.</param>
+    public SeasonalsPlugin(IApplicationPaths applicationPaths, IXmlSerializer xmlSerializer, ILoggerFactory loggerFactory)
+        : base(applicationPaths, xmlSerializer)
+    {
+        Instance = this;
+        _scriptInjector = new ScriptInjector(applicationPaths, loggerFactory.CreateLogger<ScriptInjector>());
+        if (!_scriptInjector.Inject())
+        {
+            TryRegisterFallback(loggerFactory.CreateLogger("FileTransformationFallback"));
+        }
+    }
+
+    /// <inheritdoc />
+    public override string Name => "Seasonals";
+
+    /// <inheritdoc />
+    public override Guid Id => Guid.Parse("ef1e863f-cbb0-4e47-9f23-f0cbb1826ad4");
+
+    /// <summary>
+    /// Gets the current plugin instance.
+    /// </summary>
+    public static SeasonalsPlugin? Instance { get; private set; }
+
+    /// <summary>
+    /// Callback method for FileTransformation plugin.
+    /// </summary>
+    /// <param name="payload">The payload containing the file contents.</param>
+    /// <returns>The modified file contents.</returns>
+    public static string TransformIndexHtml(JObject payload)
+    {
+        // CRITICAL: Always return original content if something fails or is null
+        string? originalContents = payload?["contents"]?.ToString();
+        
+        if (string.IsNullOrEmpty(originalContents))
+        {
+            return originalContents ?? string.Empty;
+        }
+
+        try
+        {
+            var html = originalContents;
+            const string inject = "<script src=\"/Seasonals/Resources/seasonals.js\"></script>\n<body";
+            
+            if (!html.Contains("seasonals.js", StringComparison.Ordinal))
+            {
+                return html.Replace("<body", inject, StringComparison.OrdinalIgnoreCase);
+            }
+            
+            return html;
+        }
+        catch
+        {
+            // On error, return original content to avoid breaking the UI
+            return originalContents;
+        }
+    }
+
+    private void TryRegisterFallback(ILogger logger)
+    {
+        try
+        {
+            // Find the FileTransformation assembly across all load contexts
+            var assembly = AssemblyLoadContext.All
+                .SelectMany(x => x.Assemblies)
+                .FirstOrDefault(x => x.FullName?.Contains(".FileTransformation") ?? false);
+
+            if (assembly == null)
+            {
+                logger.LogWarning("FileTransformation plugin not found. Fallback injection skipped.");
+                return;
+            }
+
+            var type = assembly.GetType("Jellyfin.Plugin.FileTransformation.PluginInterface");
+            if (type == null)
+            {
+                logger.LogWarning("Jellyfin.Plugin.FileTransformation.PluginInterface not found.");
+                return;
+            }
+
+            var method = type.GetMethod("RegisterTransformation");
+            if (method == null)
+            {
+                logger.LogWarning("RegisterTransformation method not found.");
+                return;
+            }
+
+            // Create JObject payload directly using Newtonsoft.Json
+            var payload = new JObject
+            {
+                { "id", Id.ToString() },
+                { "fileNamePattern", "index.html" },
+                { "callbackAssembly", this.GetType().Assembly.FullName },
+                { "callbackClass", this.GetType().FullName },
+                { "callbackMethod", nameof(TransformIndexHtml) }
+            };
+
+            // Invoke RegisterTransformation with the JObject payload
+            method.Invoke(null, new object[] { payload });
+            logger.LogInformation("Successfully registered fallback transformation via FileTransformation plugin.");
+        }
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Error attempting to register fallback transformation.");
+        }
+    }
+
+    /// <inheritdoc />
+    public IEnumerable<PluginPageInfo> GetPages()
+    {
+        return new[]
+        {
+            new PluginPageInfo
+            {
+                Name = Name,
+                EnableInMainMenu = true,
+                MenuIcon = "snowflake",
+                EmbeddedResourcePath = string.Format(CultureInfo.InvariantCulture, "{0}.Configuration.configPage.html", GetType().Namespace)
+            }
+        };
+    }
+}