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| 1 | +using System; |
| 2 | +using System.Collections.Generic; |
| 3 | +using System.Linq; |
| 4 | +using System.Reflection; |
| 5 | +using System.Text; |
| 6 | +using System.Threading.Tasks; |
| 7 | + |
| 8 | +namespace Biyori |
| 9 | +{ |
| 10 | + public class ServiceProvider |
| 11 | + { |
| 12 | + private List<ServiceProviderBase> serviceProviders { get; set; } |
| 13 | + public ServiceProvider() |
| 14 | + { |
| 15 | + this.serviceProviders = new List<ServiceProviderBase>(); |
| 16 | + } |
| 17 | + |
| 18 | + public T GetProvider<T>() where T : ServiceProviderBase |
| 19 | + { |
| 20 | + return GetProvider(typeof(T)) as T; |
| 21 | + } |
| 22 | + |
| 23 | + private object GetProvider(Type type) |
| 24 | + { |
| 25 | + return serviceProviders.Where(x => x.GetType() == type).FirstOrDefault(); |
| 26 | + } |
| 27 | + public void Add<T>(T serviceProvider) where T : ServiceProviderBase |
| 28 | + { |
| 29 | + this.serviceProviders.Add(serviceProvider); |
| 30 | + } |
| 31 | + public void Remove<T>(T serviceProvider) where T : ServiceProviderBase |
| 32 | + { |
| 33 | + this.serviceProviders.RemoveAll(x => x.GetType() == serviceProvider.GetType()); |
| 34 | + } |
| 35 | + public void AddOrUpdateRange<T>(IEnumerable<T> serviceProviders) where T : ServiceProviderBase |
| 36 | + { |
| 37 | + foreach(var sp in serviceProviders) |
| 38 | + { |
| 39 | + this.AddOrUpdate(sp); |
| 40 | + } |
| 41 | + } |
| 42 | + public void AddOrUpdate<T>(T serviceProvider) where T : ServiceProviderBase |
| 43 | + { |
| 44 | + if (this.serviceProviders.Where(x => x.GetType() == serviceProvider.GetType()).Count() == 0) |
| 45 | + { |
| 46 | + this.serviceProviders.Add(serviceProvider); |
| 47 | + } else |
| 48 | + { |
| 49 | + this.serviceProviders.Remove(serviceProvider); |
| 50 | + this.AddOrUpdate(serviceProvider); |
| 51 | + } |
| 52 | + } |
| 53 | + public void ScanCurrent() => ScanAssembly(Assembly.GetEntryAssembly()); |
| 54 | + public void ScanAssembly(Assembly assembly) |
| 55 | + { |
| 56 | + var providers = assembly.GetTypes().Where(x => x.GetCustomAttributes<ServiceProviderParseAttribute>().Count() > 0); |
| 57 | + var provderInstances = providers.Select(x => |
| 58 | + { |
| 59 | + var attr = x.GetCustomAttribute<ServiceProviderParseAttribute>(); |
| 60 | + var instance = Activator.CreateInstance(x); |
| 61 | + if (attr.InitializeOnStartup) |
| 62 | + { |
| 63 | + instance.GetType().GetMethod("OnInitialize")?.Invoke(instance, new object[] { }); |
| 64 | + } |
| 65 | + return instance as ServiceProviderBase; |
| 66 | + }); |
| 67 | + this.AddOrUpdateRange(provderInstances); |
| 68 | + } |
| 69 | + } |
| 70 | + public abstract class ServiceProviderBase |
| 71 | + { |
| 72 | + private void OnInitialize() |
| 73 | + { |
| 74 | + } |
| 75 | + } |
| 76 | + [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)] |
| 77 | + public class ServiceProviderParseAttribute : Attribute |
| 78 | + { |
| 79 | + public ServiceProviderParseAttribute(string name) |
| 80 | + { |
| 81 | + Name = name; |
| 82 | + } |
| 83 | + |
| 84 | + public string Name { get; set; } |
| 85 | + public bool InitializeOnStartup { get; set; } = false; |
| 86 | + } |
| 87 | +} |
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