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102 lines
3.5 KiB
102 lines
3.5 KiB
using System;
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using System.IO;
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using System.Reflection;
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namespace IPA.Loader.Features
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{
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internal class InitInjectorFeature : Feature
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{
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protected internal override bool StoreOnPlugin => false;
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public override bool Initialize(PluginLoader.PluginMetadata meta, string[] parameters)
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{ // parameters should be (assembly qualified lookup type, [fully qualified type]:[method name])
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// method should be static
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if (parameters.Length != 2)
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{
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InvalidMessage = "Incorrect number of parameters";
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return false;
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}
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RequireLoaded(meta);
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var methodParts = parameters[1].Split(':');
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var type = Type.GetType(parameters[0], false);
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if (type == null)
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{
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InvalidMessage = $"Could not find type {parameters[0]}";
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return false;
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}
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Type getType;
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try
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{
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getType = meta.Assembly.GetType(methodParts[0]);
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}
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catch (ArgumentException)
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{
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InvalidMessage = $"Invalid type name {methodParts[0]}";
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return false;
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}
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catch (Exception e) when (e is FileNotFoundException || e is FileLoadException || e is BadImageFormatException)
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{
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string filename;
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switch (e)
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{
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case FileNotFoundException fn:
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filename = fn.FileName;
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goto hasFilename;
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case FileLoadException fl:
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filename = fl.FileName;
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goto hasFilename;
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case BadImageFormatException bi:
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filename = bi.FileName;
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hasFilename:
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InvalidMessage = $"Could not find {filename} while loading type";
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break;
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default:
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InvalidMessage = $"Error while loading type: {e}";
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break;
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}
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return false;
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}
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MethodInfo method;
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try
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{
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method = getType.GetMethod(methodParts[1], BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic,
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null, new[]
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{
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typeof(object),
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typeof(ParameterInfo),
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typeof(PluginLoader.PluginMetadata)
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}, new ParameterModifier[0]);
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}
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catch (Exception e)
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{
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InvalidMessage = $"Error while loading type: {e}";
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return false;
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}
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if (method == null)
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{
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InvalidMessage = $"Could not find method {methodParts[1]} in type {methodParts[0]}";
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return false;
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}
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try
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{
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var del = (PluginInitInjector.InjectParameter)Delegate.CreateDelegate(typeof(PluginInitInjector.InjectParameter), null, method);
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PluginInitInjector.AddInjector(type, del);
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return true;
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}
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catch (Exception e)
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{
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InvalidMessage = $"Error generated while creating delegate: {e}";
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return false;
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}
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}
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}
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}
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