78 lines
2.8 KiB
C#
78 lines
2.8 KiB
C#
using System.Runtime.Loader;
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using CringeBootstrap.Abstractions;
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using CringePlugins.Utils;
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using VRage.Plugins;
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namespace CringePlugins.Loader;
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internal sealed class PluginInstance
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{
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public bool HasConfig => _openConfigAction != null;
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private readonly string _entrypointPath;
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private PluginAssemblyLoadContext? _context;
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private IPlugin? _instance;
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private Action? _openConfigAction;
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private IHandleInputPlugin? _handleInputInstance;
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public PluginMetadata Metadata { get; }
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public PluginInstance(PluginMetadata metadata, string entrypointPath)
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{
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_entrypointPath = entrypointPath;
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Metadata = metadata;
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}
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public PluginInstance(string entrypointPath) : this(PluginMetadata.ReadFromEntrypoint(entrypointPath), entrypointPath)
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{
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}
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public void Instantiate()
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{
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if (AssemblyLoadContext.GetLoadContext(typeof(PluginInstance).Assembly) is not ICoreLoadContext parentContext)
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throw new NotSupportedException("Plugin instantiation is not supported in this context");
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_context = new PluginAssemblyLoadContext(parentContext, _entrypointPath);
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var entrypoint = _context.LoadEntrypoint();
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var plugins = IntrospectionContext.Global.CollectDerivedTypes<IPlugin>(entrypoint.GetMainModule()).ToArray();
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if (plugins.Length == 0)
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throw new InvalidOperationException("Entrypoint does not contain any plugins");
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if (plugins.Length > 1)
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throw new InvalidOperationException("Entrypoint contains multiple plugins");
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_instance = (IPlugin) Activator.CreateInstance(plugins[0])!;
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var openConfigMethod = plugins[0].GetMethod("OpenConfigDialog");
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if (openConfigMethod is not null)
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{
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//todo: log this and continue without action instead of throwing exception
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if (openConfigMethod.ReturnType != typeof(void) || openConfigMethod.IsStatic || openConfigMethod.GetParameters().Length > 0)
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throw new InvalidOperationException("OpenConfigDialog method has an incorrect signature");
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_openConfigAction = openConfigMethod.CreateDelegate<Action>(_instance);
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}
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_handleInputInstance = _instance as IHandleInputPlugin;
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}
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public void RegisterLifetime()
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{
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if (_instance is null)
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throw new InvalidOperationException("Must call Instantiate first");
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MyPlugins.m_plugins.Add(_instance);
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if (_handleInputInstance is not null)
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MyPlugins.m_handleInputPlugins.Add(_handleInputInstance);
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}
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public void OpenConfig()
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{
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if (_openConfigAction is null)
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throw new InvalidOperationException("Plugin does not have OpenConfigDialog method");
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_openConfigAction();
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}
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} |