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Add legacy tag removal functionality to ScriptInjector

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CodeDevMLH
2026-02-19 18:31:10 +01:00
parent 56298487f4
commit 07600766cf
2 changed files with 248 additions and 0 deletions
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207
Injector_new.cs Normal file
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@@ -0,0 +1,207 @@
using System;
using System.IO;
using System.Reflection;
using System.Runtime.Loader;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json.Linq;
using MediaBrowser.Common.Configuration;
using Jellyfin.Plugin.Seasonals.Helpers;
using System.Collections.Generic;
using System.Linq;
namespace Jellyfin.Plugin.Seasonals;
/// <summary>
/// Handles the injection of the Seasonals script into the Jellyfin web interface.
/// </summary>
public class ScriptInjector
{
private readonly IApplicationPaths _appPaths;
private readonly ILogger<ScriptInjector> _logger;
public const string ScriptTag = "<script src=\"../Seasonals/Resources/seasonals.js\" defer></script>";
public const string Marker = "</body>";
/// <summary>
/// Initializes a new instance of the <see cref="ScriptInjector"/> class.
/// </summary>
/// <param name="appPaths">The application paths.</param>
/// <param name="logger">The logger.</param>
public ScriptInjector(IApplicationPaths appPaths, ILogger<ScriptInjector> logger)
{
_appPaths = appPaths;
_logger = logger;
}
/// <summary>
/// Injects the script tag into index.html if it's not already present.
/// </summary>
public void Inject()
{
try
{
var webPath = GetWebPath();
if (string.IsNullOrEmpty(webPath))
{
_logger.LogWarning("Could not find Jellyfin web path. Script injection skipped. Attempting fallback.");
RegisterFileTransformation();
return;
}
var indexPath = Path.Combine(webPath, "index.html");
if (!File.Exists(indexPath))
{
_logger.LogWarning("index.html not found at {Path}. Script injection skipped. Attempting fallback.", indexPath);
RegisterFileTransformation();
return;
}
var content = File.ReadAllText(indexPath);
if (!content.Contains(ScriptTag))
{
var index = content.IndexOf(Marker, StringComparison.OrdinalIgnoreCase);
if (index != -1)
{
content = content.Insert(index, ScriptTag + Environment.NewLine);
File.WriteAllText(indexPath, content);
_logger.LogInformation("Successfully injected Seasonals script into index.html.");
}
else
{
_logger.LogWarning("Script already present in index.html. Or could not be injected.");
}
}
}
catch (UnauthorizedAccessException)
{
_logger.LogWarning("Unauthorized access when attempting to inject script into index.html. Automatic injection failed. Attempting fallback now...");
RegisterFileTransformation();
}
catch (Exception ex)
{
_logger.LogError(ex, "Error injecting Seasonals script. Attempting fallback.");
RegisterFileTransformation();
}
}
/// <summary>
/// Removes the script tag from index.html.
/// </summary>
public void Remove()
{
UnregisterFileTransformation();
try
{
var webPath = GetWebPath();
if (string.IsNullOrEmpty(webPath))
{
return;
}
var indexPath = Path.Combine(webPath, "index.html");
if (!File.Exists(indexPath))
{
return;
}
var content = File.ReadAllText(indexPath);
if (content.Contains(ScriptTag))
{
content = content.Replace(ScriptTag + Environment.NewLine, "").Replace(ScriptTag, "");
File.WriteAllText(indexPath, content);
_logger.LogInformation("Successfully removed Seasonals script from index.html.");
} else {
_logger.LogInformation("Seasonals script tag not found in index.html. No removal necessary.");
}
}
catch (UnauthorizedAccessException)
{
_logger.LogWarning("Unauthorized access when attempting to remove script from index.html.");
}
catch (Exception ex)
{
_logger.LogError(ex, "Error removing Seasonals script.");
}
}
/// <summary>
/// Retrieves the path to the Jellyfin web interface directory.
/// </summary>
/// <returns>The path to the web directory, or null if not found.</returns>
private string? GetWebPath()
{
// Use reflection to access WebPath property to ensure compatibility across different Jellyfin versions
var prop = _appPaths.GetType().GetProperty("WebPath", BindingFlags.Instance | BindingFlags.Public);
return prop?.GetValue(_appPaths) as string;
}
private void RegisterFileTransformation()
{
_logger.LogInformation("Seasonals Fallback. Registering file transformations.");
List<JObject> payloads = new List<JObject>();
{
JObject payload = new JObject();
payload.Add("id", "ef1e863f-cbb0-4e47-9f23-f0cbb1826ad4");
payload.Add("fileNamePattern", "index.html");
payload.Add("callbackAssembly", GetType().Assembly.FullName);
payload.Add("callbackClass", typeof(TransformationPatches).FullName);
payload.Add("callbackMethod", nameof(TransformationPatches.IndexHtml));
payloads.Add(payload);
}
Assembly? fileTransformationAssembly =
AssemblyLoadContext.All.SelectMany(x => x.Assemblies).FirstOrDefault(x =>
x.FullName?.Contains(".FileTransformation") ?? false);
if (fileTransformationAssembly != null)
{
Type? pluginInterfaceType = fileTransformationAssembly.GetType("Jellyfin.Plugin.FileTransformation.PluginInterface");
if (pluginInterfaceType != null)
{
foreach (JObject payload in payloads)
{
pluginInterfaceType.GetMethod("RegisterTransformation")?.Invoke(null, new object?[] { payload });
}
_logger.LogInformation("File transformations registered successfully.");
}
else
{
_logger.LogWarning("FileTransformation plugin found but PluginInterface type missing.");
}
}
else
{
_logger.LogWarning("FileTransformation plugin assembly not found. Fallback injection skipped.");
}
}
private void UnregisterFileTransformation()
{
try
{
Assembly? fileTransformationAssembly =
AssemblyLoadContext.All.SelectMany(x => x.Assemblies).FirstOrDefault(x =>
x.FullName?.Contains(".FileTransformation") ?? false);
if (fileTransformationAssembly != null)
{
Type? pluginInterfaceType = fileTransformationAssembly.GetType("Jellyfin.Plugin.FileTransformation.PluginInterface");
if (pluginInterfaceType != null)
{
Guid id = Guid.Parse("ef1e863f-cbb0-4e47-9f23-f0cbb1826ad4");
pluginInterfaceType.GetMethod("RemoveTransformation")?.Invoke(null, new object?[] { id });
_logger.LogInformation("File transformation unregistered successfully.");
}
}
}
catch (Exception ex)
{
_logger.LogWarning(ex, "Error attempting to unregister file transformation. It might not have been registered.");
}
}
}

41
Jellyfin.Plugin.Seasonals/ScriptInjector.cs
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@@ -56,6 +56,18 @@ public class ScriptInjector
}
var content = File.ReadAllText(indexPath);
// MARK: Legacy Tags, remove in future versions
bool modified = false;
// Cleanup legacy tags first to avoid duplicates or conflicts
content = RemoveLegacyTags(content, ref modified);
if (modified)
{
_logger.LogInformation("Removed legacy tags from index.html.");
}
if (!content.Contains(ScriptTag))
{
var index = content.IndexOf(Marker, StringComparison.OrdinalIgnoreCase);
@@ -113,6 +125,17 @@ public class ScriptInjector
} else {
_logger.LogInformation("Seasonals script tag not found in index.html. No removal necessary.");
}
// MARK: Legacy Tags, remove in future versions
// Remove legacy tags
bool modified = false;
content = RemoveLegacyTags(content);
if (modified)
{
_logger.LogInformation("Removed legacy tags from index.html.");
}
}
catch (UnauthorizedAccessException)
{
@@ -204,4 +227,22 @@ public class ScriptInjector
_logger.LogWarning(ex, "Error attempting to unregister file transformation. It might not have been registered.");
}
}
// MARK: Legacy Tags, remove in future versions
/// <summary>
/// Removes legacy script and css tags from the content.
/// </summary>
private string RemoveLegacyTags(string content, ref bool modified)
{
// Legacy tags (used in versions prior to 1.6.3.0 where paths started with / instead of ../)
const string LegacyScriptTag = "<script src=\"/Seasonals/Resources/seasonals.js\" defer></script>";
if (content.Contains(LegacyScriptTag))
{
content = content.Replace(LegacyScriptTag + Environment.NewLine, "").Replace(LegacyScriptTag, "");
modified = true;
_logger.LogInformation("Legacy Seasonals script tag removed.");
}
return content;
}
}