104 lines
3.6 KiB
C#
104 lines
3.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.IO;
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using System.Reflection;
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using PluginContracts;
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namespace Toolbox.Library
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{
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public class PluginLoader
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{
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public Dictionary<string, IPlugin> _Plugins;
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public PluginLoader()
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{
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}
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public static ICollection<IPlugin> LoadPlugins()
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{
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string path = Runtime.ExecutableDir + "/Lib/Plugins";
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string[] dllFileNames = null;
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if (Directory.Exists(path))
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{
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dllFileNames = Directory.GetFiles(path, "*.Plg.dll");
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}
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if (dllFileNames == null)
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{
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System.Windows.Forms.MessageBox.Show($"Could not find any plugins in {path}", "",
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System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Error);
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return new List<IPlugin>();
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}
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ICollection<Assembly> assemblies = new List<Assembly>(dllFileNames.Length);
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foreach (string dllFile in dllFileNames)
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{
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AssemblyName an = AssemblyName.GetAssemblyName(dllFile);
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Assembly assembly = Assembly.Load(an);
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assemblies.Add(assembly);
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}
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Type pluginType = typeof(IPlugin);
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ICollection<Type> pluginTypes = new List<Type>();
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foreach (Assembly assembly in assemblies)
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{
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if (assembly != null)
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{
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try
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{
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Type[] types = assembly.GetTypes();
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foreach (Type type in types)
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{
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if (type.IsInterface || type.IsAbstract)
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{
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continue;
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}
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else
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{
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if (type.GetInterface(pluginType.FullName) != null)
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{
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pluginTypes.Add(type);
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}
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}
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}
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}
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catch (ReflectionTypeLoadException ex)
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{
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StringBuilder sb = new StringBuilder();
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foreach (Exception exSub in ex.LoaderExceptions)
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{
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sb.AppendLine(exSub.Message);
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FileNotFoundException exFileNotFound = exSub as FileNotFoundException;
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if (exFileNotFound != null)
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{
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if (!string.IsNullOrEmpty(exFileNotFound.FusionLog))
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{
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sb.AppendLine("Fusion Log:");
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sb.AppendLine(exFileNotFound.FusionLog);
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}
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}
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sb.AppendLine();
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}
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string errorMessage = sb.ToString();
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throw new Exception(errorMessage);
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}
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}
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}
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ICollection<IPlugin> plugins = new List<IPlugin>(pluginTypes.Count);
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foreach (Type type in pluginTypes)
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{
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IPlugin plugin = (IPlugin)Activator.CreateInstance(type);
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plugins.Add(plugin);
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}
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assemblies.Clear();
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pluginTypes.Clear();
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return plugins;
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}
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}
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}
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