Initial check-in

MediaBrowser.Common/Plugins/PluginController.cs

@@ -0,0 +1,90 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+
+namespace MediaBrowser.Common.Plugins
+{
+    public class PluginController
+    {
+        public string PluginsPath { get; set; }
+
+        public PluginController(string pluginFolderPath)
+        {
+            PluginsPath = pluginFolderPath;
+        }
+
+        public IEnumerable<IPlugin> GetAllPlugins()
+        {
+            AppDomain.CurrentDomain.AssemblyResolve -= new ResolveEventHandler(CurrentDomain_AssemblyResolve);
+            AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);
+            
+            if (!Directory.Exists(PluginsPath))
+            {
+                Directory.CreateDirectory(PluginsPath);
+            }
+
+            List<IPlugin> plugins = new List<IPlugin>();
+
+            foreach (string folder in Directory.GetDirectories(PluginsPath, "*", SearchOption.TopDirectoryOnly))
+            {
+                IPlugin plugin = GetPluginFromDirectory(folder);
+
+                plugin.Path = folder;
+
+                if (plugin != null)
+                {
+                    plugins.Add(plugin);
+                }
+            }
+
+            return plugins;
+        }
+
+        private IPlugin GetPluginFromDirectory(string path)
+        {
+            string dll = Directory.GetFiles(path, "*.dll", SearchOption.TopDirectoryOnly).FirstOrDefault();
+
+            if (!string.IsNullOrEmpty(dll))
+            {
+                return GetPluginFromDll(dll);
+            }
+
+            return null;
+        }
+
+        private IPlugin GetPluginFromDll(string path)
+        {
+            return FindPlugin(Assembly.Load(File.ReadAllBytes(path)));
+        }
+
+        private IPlugin FindPlugin(Assembly assembly)
+        {
+            var plugin = assembly.GetTypes().Where(type => typeof(IPlugin).IsAssignableFrom(type)).FirstOrDefault();
+
+            if (plugin != null)
+            {
+                return plugin.GetConstructor(Type.EmptyTypes).Invoke(null) as IPlugin;
+            }
+
+            return null;
+        }
+
+        Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
+        {
+            AssemblyName assemblyName = new AssemblyName(args.Name);
+
+            IEnumerable<string> dllPaths = Directory.GetFiles(PluginsPath, "*.dll", SearchOption.AllDirectories);
+
+            string dll = dllPaths.FirstOrDefault(f => Path.GetFileNameWithoutExtension(f) == assemblyName.Name);
+
+            if (!string.IsNullOrEmpty(dll))
+            {
+                return Assembly.Load(File.ReadAllBytes(dll));
+            }
+
+            return null;
+        }
+    }
+}