113 lines
3.4 KiB
C#
113 lines
3.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using System.Threading.Tasks;
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using MediaBrowser.Common.Kernel;
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namespace MediaBrowser.Common.Plugins
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{
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/// <summary>
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/// Manages Plugins within the PluginsPath directory
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/// </summary>
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public class PluginController
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{
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public string PluginsPath { get; set; }
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/// <summary>
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/// Gets the list of currently loaded plugins
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/// </summary>
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public IEnumerable<IPlugin> Plugins { get; private set; }
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/// <summary>
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/// Initializes the controller
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/// </summary>
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public void Init(KernelContext context)
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{
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AppDomain.CurrentDomain.AssemblyResolve -= new ResolveEventHandler(CurrentDomain_AssemblyResolve);
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AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);
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Plugins = GetAllPlugins();
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Parallel.For(0, Plugins.Count(), i =>
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{
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Plugins.ElementAt(i).Init();
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});
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}
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/// <summary>
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/// Gets all plugins within PluginsPath
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/// </summary>
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/// <returns></returns>
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private IEnumerable<IPlugin> GetAllPlugins()
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{
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if (!Directory.Exists(PluginsPath))
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{
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Directory.CreateDirectory(PluginsPath);
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}
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List<IPlugin> plugins = new List<IPlugin>();
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foreach (string folder in Directory.GetDirectories(PluginsPath, "*", SearchOption.TopDirectoryOnly))
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{
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IPlugin plugin = GetPluginFromDirectory(folder);
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plugin.Path = folder;
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if (plugin != null)
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{
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plugins.Add(plugin);
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}
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}
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return plugins;
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}
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private IPlugin GetPluginFromDirectory(string path)
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{
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string dll = Directory.GetFiles(path, "*.dll", SearchOption.TopDirectoryOnly).FirstOrDefault();
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if (!string.IsNullOrEmpty(dll))
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{
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return GetPluginFromDll(dll);
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}
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return null;
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}
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private IPlugin GetPluginFromDll(string path)
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{
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return GetPluginFromDll(Assembly.Load(File.ReadAllBytes(path)));
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}
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private IPlugin GetPluginFromDll(Assembly assembly)
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{
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var plugin = assembly.GetTypes().Where(type => typeof(IPlugin).IsAssignableFrom(type)).FirstOrDefault();
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if (plugin != null)
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{
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return plugin.GetConstructor(Type.EmptyTypes).Invoke(null) as IPlugin;
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}
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return null;
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}
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Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
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{
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AssemblyName assemblyName = new AssemblyName(args.Name);
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IEnumerable<string> dllPaths = Directory.GetFiles(PluginsPath, "*.dll", SearchOption.AllDirectories);
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string dll = dllPaths.FirstOrDefault(f => Path.GetFileNameWithoutExtension(f) == assemblyName.Name);
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if (!string.IsNullOrEmpty(dll))
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{
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return Assembly.Load(File.ReadAllBytes(dll));
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}
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return null;
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}
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}
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}
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