src/EasyFrameWork/Mvc/Plugin/Loader.cs

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/* http://www.zkea.net/ 
 * Copyright (c) ZKEASOFT. All rights reserved. 
 * http://www.zkea.net/licenses */

using Easy.Extend;
using Easy.Serializer;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;

namespace Easy.Mvc.Plugin
{
    public class Loader : IPluginLoader
    {
        public const string PluginFolder = "Plugins";
        private const string PluginInfoFile = "zkea.plugin";
#if DEBUG
        private readonly string[] AltDevelopmentPath = new[] { "bin", "Debug", "net6.0" };
#else
        private readonly string[] AltDevelopmentPath = new[] { "bin", "Release", "net6.0" };
#endif
        private readonly static List<AssemblyLoader> Loaders = new List<AssemblyLoader>();
        private readonly static Dictionary<string, Assembly> LoadedAssemblies = new Dictionary<string, Assembly>();
        public Loader(IWebHostEnvironment hostEnvironment)
        {
            HostingEnvironment = hostEnvironment;
        }
        public IWebHostEnvironment HostingEnvironment { get; set; }
        public IEnumerable<IPluginStartup> LoadEnablePlugins(IServiceCollection serviceCollection)
        {
            var start = DateTime.Now;
            List<PluginInfo> availablePlugins = GetPlugins().Where(m => m.Enable && m.ID.IsNotNullAndWhiteSpace()).ToList();
            Loaders.AddRange(availablePlugins.Select(m =>
            {
                var loader = new AssemblyLoader(availablePlugins)
                {
                    CurrentPath = m.RelativePath
                };
                var assemblyPath = Path.Combine(m.RelativePath, (HostingEnvironment.IsDevelopment() ? Path.Combine(AltDevelopmentPath) : string.Empty), m.FileName);

                Console.WriteLine("Loading: {0}", m.Name);

                var assemblies = loader.LoadPlugin(assemblyPath);
                assemblies.Each(assembly =>
                {
                    if (!LoadedAssemblies.ContainsKey(assembly.FullName))
                    {
                        LoadedAssemblies.Add(assembly.FullName, assembly);
                    }
                });
                return loader;
            }));
            Console.WriteLine("All plugins are loaded. Elapsed: {0}ms", (DateTime.Now - start).Milliseconds);
            return serviceCollection.ConfigurePlugin().BuildServiceProvider().GetPlugins();
        }