Killed history

NadekoBot.Core/Common/Extensions/ServiceCollectionExtensions.cs

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+using System;
+using System.Linq;
+using System.Reflection;
+using Microsoft.Extensions.DependencyInjection;
+using NadekoBot.Core.Common;
+using NadekoBot.Core.Modules.Music;
+using NadekoBot.Core.Services;
+using NadekoBot.Modules.Administration.Services;
+using NadekoBot.Modules.Music.Resolvers;
+using NadekoBot.Modules.Music.Services;
+
+namespace NadekoBot.Extensions
+{
+    public static class ServiceCollectionExtensions
+    {
+        public static IServiceCollection AddBotStringsServices(this IServiceCollection services)
+            => services
+                .AddSingleton<IStringsSource, LocalFileStringsSource>()
+                .AddSingleton<IBotStringsProvider, LocalBotStringsProvider>()
+                .AddSingleton<IBotStrings, BotStrings>();
+
+        public static IServiceCollection AddConfigServices(this IServiceCollection services)
+        {
+            var baseType = typeof(ConfigServiceBase<>);
+
+            foreach (var type in Assembly.GetCallingAssembly().ExportedTypes.Where(x => x.IsSealed))
+            {
+                if (type.BaseType?.IsGenericType == true && type.BaseType.GetGenericTypeDefinition() == baseType)
+                {
+                    services.AddSingleton(type);
+                    services.AddSingleton(x => (IConfigService)x.GetRequiredService(type));
+                }
+            }
+
+            return services;
+        }
+
+        public static IServiceCollection AddConfigMigrators(this IServiceCollection services)
+            => services.AddSealedSubclassesOf(typeof(IConfigMigrator));
+
+        public static IServiceCollection AddMusic(this IServiceCollection services)
+            => services
+                .AddSingleton<IMusicService, MusicService>()
+                .AddSingleton<ITrackResolveProvider, TrackResolveProvider>()
+                .AddSingleton<IYoutubeResolver, YtdlYoutubeResolver>()
+                .AddSingleton<ISoundcloudResolver, SoundcloudResolver>()
+                .AddSingleton<ILocalTrackResolver, LocalTrackResolver>()
+                .AddSingleton<IRadioResolver, RadioResolver>()
+                .AddSingleton<ITrackCacher, RedisTrackCacher>()
+                .AddSingleton<YtLoader>()
+                .AddSingleton<IPlaceholderProvider>(svc => svc.GetService<IMusicService>());
+        
+        // consider using scrutor, because slightly different versions
+        // of this might be needed in several different places
+        public static IServiceCollection AddSealedSubclassesOf(this IServiceCollection services, Type baseType)
+        {
+            var subTypes = Assembly.GetCallingAssembly()
+                .ExportedTypes
+                .Where(type => type.IsSealed && baseType.IsAssignableFrom(type));
+
+            foreach (var subType in subTypes)
+            {
+                services.AddSingleton(baseType, subType);
+            }
+
+            return services;
+        }
+    }
+}