101 lines
3 KiB
C#
101 lines
3 KiB
C#
/*
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TShock, a server mod for Terraria
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Copyright (C) 2011-2019 Pryaxis & TShock Contributors
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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namespace TShockAPI.Modules
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{
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public class ModuleManager : IDisposable
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{
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private List<Module> _modules = new();
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/// <summary>
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/// Discovers <see cref="Module"/> derived classes from across the assembly
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/// </summary>
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/// <returns>Type definitions of the modules that can be created</returns>
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IEnumerable<Type> CollectModules() => Assembly.GetExecutingAssembly()
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.GetTypes()
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.Where(t => typeof(Module).IsAssignableFrom(t) && !t.IsAbstract)
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;
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/// <summary>
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/// Initialises <see cref="Module"/> derived classes defined across the assembly
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/// </summary>
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/// <param name="parameters">Additional constructor arguments allowed for modules</param>
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public void Initialise(object[] parameters)
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{
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foreach (var moduleType in CollectModules())
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InitialiseModule(moduleType, parameters);
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}
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/// <summary>
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/// Initialises a module by its type definition
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/// </summary>
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/// <param name="moduleType">The type of the module</param>
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/// <param name="parameters">Additional constructor arguments allowed for modules</param>
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public void InitialiseModule(Type moduleType, object[] parameters)
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{
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if (!typeof(Module).IsAssignableFrom(moduleType))
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throw new NotSupportedException(GetString($"Cannot load module {moduleType.FullName} as it does not derive from {typeof(Module).FullName}"));
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var args = new List<object>();
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ConstructorInfo constructor = null;
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foreach (var ctor in moduleType.GetConstructors())
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{
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args.Clear();
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var ctorParams = ctor.GetParameters();
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foreach (var prm in ctorParams)
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{
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var matching_objects = parameters.Where(p => prm.ParameterType.IsAssignableFrom(p.GetType()));
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if (matching_objects.Count() == 1)
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args.Add(matching_objects.Single());
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else
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{
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// skip this ctor since we cannot find a suitable parameter for it.
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break;
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}
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}
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if (args.Count == ctorParams.Length)
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constructor = ctor;
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}
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if (constructor is not null)
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{
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var module = (Module)constructor.Invoke(args.ToArray());
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_modules.Add(module);
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module.Initialise();
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}
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}
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/// <summary>
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/// Disposes of the module and the manager instance
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/// </summary>
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public void Dispose()
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{
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foreach (var module in _modules)
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module.Dispose();
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_modules.Clear();
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}
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}
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}
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