56 lines
2.1 KiB
C#
56 lines
2.1 KiB
C#
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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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using System.Text;
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using System.Threading.Tasks;
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namespace TravelCompanyContracts.DI
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{
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public class ServiceProviderLoader
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{
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/// <summary>
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/// Загрузка всех классов-реализаций IImplementationExtension
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/// </summary>
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/// <returns></returns>
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public static IImplementationExtension? GetImplementationExtensions()
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{
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IImplementationExtension? source = null;
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var files = Directory.GetFiles(TryGetImplementationExtensionsFolder(), "*.dll", SearchOption.AllDirectories);
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foreach (var file in files.Distinct())
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{
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Assembly asm = Assembly.LoadFrom(file);
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foreach (var t in asm.GetExportedTypes())
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{
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if (t.IsClass && typeof(IImplementationExtension).IsAssignableFrom(t))
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{
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if (source == null)
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{
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source = (IImplementationExtension)Activator.CreateInstance(t)!;
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}
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else
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{
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var newSource = (IImplementationExtension)Activator.CreateInstance(t)!;
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if (newSource.Priority > source.Priority)
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{
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source = newSource;
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}
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}
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}
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}
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}
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return source;
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}
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private static string TryGetImplementationExtensionsFolder()
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{
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var directory = new DirectoryInfo(Directory.GetCurrentDirectory());
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while (directory != null && !directory.GetDirectories("ImplementationExtensions", SearchOption.AllDirectories).Any(x => x.Name == "ImplementationExtensions"))
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{
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directory = directory.Parent;
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}
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return $"{directory?.FullName}\\ImplementationExtensions";
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}
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}
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}
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