73 lines
3.0 KiB
C#
73 lines
3.0 KiB
C#
using System;
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using System.IO;
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using MediaBrowser.Common.Configuration;
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using Microsoft.Extensions.Logging;
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namespace Jellyfin.Plugin.JellyLMS.Services;
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/// <summary>
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/// Injects (or removes) a script tag in the web client's <c>index.html</c>
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/// that adds a floating button linking to the JellyLMS remote control page.
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/// This follows the pattern used by other Jellyfin plugins (e.g. Intro Skipper)
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/// since there is no official plugin hook for adding buttons to the web client.
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/// </summary>
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public static class WebClientPatchService
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{
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private const string Marker = "<!-- jellylms-remote-button -->";
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private const string ScriptTag = "<script defer src=\"/JellyLms/RemoteControl/ClientScript\"></script>";
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private const string Injected = ScriptTag + Marker + "\n</body>";
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/// <summary>
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/// Ensures the web client's index.html either has or does not have the
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/// JellyLMS remote button script injected, matching <paramref name="enableButton"/>.
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/// </summary>
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/// <param name="applicationPaths">The Jellyfin application paths.</param>
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/// <param name="enableButton">Whether the remote button script should be present.</param>
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/// <param name="logger">The logger.</param>
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public static void Apply(IApplicationPaths applicationPaths, bool enableButton, ILogger logger)
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{
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var indexPath = Path.Combine(applicationPaths.WebPath, "index.html");
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try
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{
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if (!File.Exists(indexPath))
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{
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logger.LogDebug("JellyLMS: web client index.html not found at {Path}", indexPath);
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return;
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}
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var html = File.ReadAllText(indexPath);
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var hasMarker = html.Contains(Marker, StringComparison.Ordinal);
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if (enableButton && !hasMarker)
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{
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var patched = ReplaceLast(html, "</body>", Injected);
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File.WriteAllText(indexPath, patched);
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logger.LogInformation("JellyLMS: injected remote control button into {Path}", indexPath);
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}
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else if (!enableButton && hasMarker)
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{
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var patched = html.Replace(ScriptTag + Marker + "\n", string.Empty, StringComparison.Ordinal)
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.Replace(ScriptTag + Marker, string.Empty, StringComparison.Ordinal);
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File.WriteAllText(indexPath, patched);
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logger.LogInformation("JellyLMS: removed remote control button from {Path}", indexPath);
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}
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}
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catch (Exception ex) when (ex is IOException or UnauthorizedAccessException)
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{
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logger.LogWarning(ex, "JellyLMS: failed to patch web client index.html at {Path}", indexPath);
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}
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}
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private static string ReplaceLast(string source, string find, string replace)
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{
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var index = source.LastIndexOf(find, StringComparison.Ordinal);
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if (index < 0)
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{
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return source;
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}
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return source[..index] + replace + source[(index + find.Length)..];
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}
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}
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