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using Autofac;
using PKISharp.WACS.Plugins.Interfaces;
using PKISharp.WACS.Services.Serialization;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Loader;
namespace PKISharp.WACS.Services
{
public class PluginService : IPluginService
{
private readonly List<Type> _allTypes;
private readonly List<Type> _argumentProviders;
private readonly List<Type> _optionFactories;
private readonly List<Type> _plugins;
internal readonly ILogService _log;
public IEnumerable<IArgumentsProvider> ArgumentsProviders()
{
return _argumentProviders.Select(x =>
{
var c = x.GetConstructor(new Type[] { });
var ret = (IArgumentsProvider)c.Invoke(new object[] { });
ret.Log = _log;
return ret;
}).ToList();
}
public IEnumerable<Type> PluginOptionTypes<T>() where T : PluginOptions => GetResolvable<T>();
internal void Configure(ContainerBuilder builder)
{
_optionFactories.ForEach(t => builder.RegisterType(t).SingleInstance());
_plugins.ForEach(ip => builder.RegisterType(ip));
}
public IEnumerable<T> GetFactories<T>(ILifetimeScope scope) where T : IPluginOptionsFactory => _optionFactories.Select(scope.Resolve).OfType<T>().OrderBy(x => x.Order).ToList();
private IEnumerable<T> GetByName<T>(string name, ILifetimeScope scope) where T : IPluginOptionsFactory => GetFactories<T>(scope).Where(x => x.Match(name));
public PluginService(ILogService logger)
{
_log = logger;
_allTypes = GetTypes();
_argumentProviders = GetResolvable<IArgumentsProvider>();
_optionFactories = GetResolvable<IPluginOptionsFactory>(true);
_plugins = new List<Type>();
void AddPluginType<T>(string name)
{
var temp = GetResolvable<T>();
ListPlugins(temp, name);
_plugins.AddRange(temp);
}
AddPluginType<ITargetPlugin>("target");
AddPluginType<IValidationPlugin>("validation");
AddPluginType<IOrderPlugin>("order");
AddPluginType<ICsrPlugin>("csr");
AddPluginType<IStorePlugin>("store");
AddPluginType<IInstallationPlugin>("installation");
}
private void ListPlugins(IEnumerable<Type> list, string type)
{
list.Where(x => x.Assembly != typeof(PluginService).Assembly).
All(x => {
_log.Verbose("Loaded {type} plugin {name} from {location}", type, x.Name, x.Assembly.Location);
return false;
});
}
internal IEnumerable<Type> GetTypesFromAssembly(Assembly assembly)
{
if (assembly.DefinedTypes == null)
{
return new List<Type>();
}
return assembly.DefinedTypes.
Where(x =>
{
if (!string.IsNullOrEmpty(x.FullName) &&
x.FullName.StartsWith("PKISharp"))
{
return true;
}
if (x.ImplementedInterfaces != null)
{
if (x.ImplementedInterfaces.Any(x =>
!string.IsNullOrEmpty(x.FullName) &&
x.FullName.StartsWith("PKISharp")))
{
return true;
}
}
return false;
}
).
Select(x =>
{
try
{
return x.AsType();
}
catch (Exception ex)
{
_log.Error(ex, "Error loading type {x}", x.FullName);
throw;
}
}
);
}
internal virtual List<Type> GetTypes()
{
var scanned = new List<Assembly>();
var ret = new List<Type>();
foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
{
if (assembly.FullName.Contains("wacs"))
{
IEnumerable<Type> types = new List<Type>();
try
{
types = GetTypesFromAssembly(assembly).ToList();
}
catch (ReflectionTypeLoadException rex)
{
types = rex.Types;
foreach (var lex in rex.LoaderExceptions)
{
_log.Error(lex, "Error loading type from {assembly}: {reason}", assembly.FullName, lex.Message);
}
}
catch (Exception ex)
{
_log.Error("Error loading types from assembly {assembly}: {@ex}", assembly.FullName, ex);
}
ret.AddRange(types);
}
scanned.Add(assembly);
}
var installDir = new FileInfo(Process.GetCurrentProcess().MainModule.FileName).Directory;
var dllFiles = installDir.EnumerateFiles("*.dll", SearchOption.AllDirectories);
#if PLUGGABLE
var allAssemblies = new List<Assembly>();
foreach (var file in dllFiles)
{
try
{
allAssemblies.Add(AssemblyLoadContext.Default.LoadFromAssemblyPath(file.FullName));
}
catch (BadImageFormatException)
{
// Not a .NET Assembly (likely runtime)
}
catch (Exception ex)
{
_log.Error(ex, "Error loading assembly {assembly}", file);
}
}
foreach (var assembly in allAssemblies)
{
IEnumerable<Type> types = new List<Type>();
try
{
if (!scanned.Contains(assembly))
{
types = GetTypesFromAssembly(assembly).ToList();
}
}
catch (ReflectionTypeLoadException rex)
{
types = rex.Types;
foreach (var lex in rex.LoaderExceptions)
{
_log.Error(lex, "Error loading type from {assembly}", assembly.FullName);
}
}
catch (Exception ex)
{
_log.Error(ex, "Error loading types from assembly {assembly}", assembly.FullName);
}
ret.AddRange(types);
}
#else
if (dllFiles.Any())
{
_log.Error("This version of the program does not support external plugins, please download the pluggable version.");
}
#endif
return ret;
}
private List<Type> GetResolvable<T>(bool allowNull = false)
{
var ret = _allTypes.AsEnumerable();
ret = ret.Where(type => typeof(T) != type && typeof(T).IsAssignableFrom(type) && !type.IsAbstract);
ret = ret.Where(type => !typeof(IIgnore).IsAssignableFrom(type));
if (!allowNull)
{
ret = ret.Where(type => !typeof(INull).IsAssignableFrom(type));
}
return ret.ToList();
}
public T GetFactory<T>(ILifetimeScope scope, string name, string? parameter = null) where T : IPluginOptionsFactory
{
var plugins = GetByName<T>(name, scope);
if (typeof(T) is IValidationPluginOptionsFactory)
{
plugins = plugins.Where(x => string.Equals(parameter, (x as IValidationPluginOptionsFactory)?.ChallengeType, StringComparison.InvariantCultureIgnoreCase));
}
return plugins.FirstOrDefault();
}
}
}
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