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| 1 | +using System; |
| 2 | +using Microsoft.Extensions.DependencyInjection; |
| 3 | +using Microsoft.Extensions.DependencyInjection.Extensions; |
| 4 | +using Microsoft.Extensions.Logging; |
| 5 | +using OpenFeature.Internal; |
| 6 | +using OpenFeature.Model; |
| 7 | + |
| 8 | +namespace OpenFeature; |
| 9 | + |
| 10 | +/// <summary> |
| 11 | +/// |
| 12 | +/// </summary> |
| 13 | +public static class OpenFeatureBuilderExtensions |
| 14 | +{ |
| 15 | + /// <summary> |
| 16 | + /// |
| 17 | + /// </summary> |
| 18 | + /// <param name="builder"></param> |
| 19 | + /// <param name="configure"></param> |
| 20 | + /// <returns> |
| 21 | + /// |
| 22 | + /// </returns> |
| 23 | + public static OpenFeatureBuilder AddEvaluationContext( |
| 24 | + this OpenFeatureBuilder builder, |
| 25 | + Action<EvaluationContextBuilder> configure) |
| 26 | + { |
| 27 | + Check.NotNull(builder); |
| 28 | + Check.NotNull(configure); |
| 29 | + |
| 30 | + AddEvaluationContext(builder, null, (b, _, _) => configure(b)); |
| 31 | + |
| 32 | + return builder; |
| 33 | + } |
| 34 | + |
| 35 | + /// <summary> |
| 36 | + /// |
| 37 | + /// </summary> |
| 38 | + /// <param name="builder"></param> |
| 39 | + /// <param name="configure"></param> |
| 40 | + /// <returns> |
| 41 | + /// |
| 42 | + /// </returns> |
| 43 | + public static OpenFeatureBuilder AddEvaluationContext( |
| 44 | + this OpenFeatureBuilder builder, |
| 45 | + Action<EvaluationContextBuilder, IServiceProvider> configure) |
| 46 | + { |
| 47 | + Check.NotNull(builder); |
| 48 | + Check.NotNull(configure); |
| 49 | + |
| 50 | + AddEvaluationContext(builder, null, (b, _, s) => configure(b, s)); |
| 51 | + |
| 52 | + return builder; |
| 53 | + } |
| 54 | + |
| 55 | + /// <summary> |
| 56 | + /// |
| 57 | + /// </summary> |
| 58 | + /// <param name="builder"></param> |
| 59 | + /// <param name="providerName"></param> |
| 60 | + /// <param name="configure"></param> |
| 61 | + /// <returns> |
| 62 | + /// |
| 63 | + /// </returns> |
| 64 | + public static OpenFeatureBuilder AddEvaluationContext( |
| 65 | + this OpenFeatureBuilder builder, |
| 66 | + string? providerName, |
| 67 | + Action<EvaluationContextBuilder, string?, IServiceProvider> configure) |
| 68 | + { |
| 69 | + Check.NotNull(builder); |
| 70 | + Check.NotNull(configure); |
| 71 | + |
| 72 | + builder.Services.AddKeyedSingleton(providerName, (services, key) => |
| 73 | + { |
| 74 | + var b = EvaluationContext.Builder(); |
| 75 | + |
| 76 | + configure(b, key as string, services); |
| 77 | + |
| 78 | + return b.Build(); |
| 79 | + }); |
| 80 | + |
| 81 | + return builder; |
| 82 | + } |
| 83 | + |
| 84 | + /// <summary> |
| 85 | + /// |
| 86 | + /// </summary> |
| 87 | + /// <param name="builder"></param> |
| 88 | + /// <param name="providerName"></param> |
| 89 | + public static void TryAddOpenFeatureClient(this OpenFeatureBuilder builder, string? providerName = null) |
| 90 | + { |
| 91 | + Check.NotNull(builder); |
| 92 | + |
| 93 | + builder.Services.AddHostedService<OpenFeatureHostedService>(); |
| 94 | + |
| 95 | + builder.Services.TryAddKeyedSingleton(providerName, static (services, providerName) => |
| 96 | + { |
| 97 | + var api = providerName switch |
| 98 | + { |
| 99 | + null => Api.Instance, |
| 100 | + not null => services.GetRequiredKeyedService<Api>(null) |
| 101 | + }; |
| 102 | + |
| 103 | + api.AddHooks(services.GetKeyedServices<Hook>(providerName)); |
| 104 | + api.SetContext(services.GetRequiredKeyedService<EvaluationContextBuilder>(providerName).Build()); |
| 105 | + |
| 106 | + return api; |
| 107 | + }); |
| 108 | + |
| 109 | + builder.Services.TryAddKeyedSingleton(providerName, static (services, providerName) => providerName switch |
| 110 | + { |
| 111 | + null => services.GetRequiredService<ILogger<FeatureClient>>(), |
| 112 | + not null => services.GetRequiredService<ILoggerFactory>().CreateLogger($"OpenFeature.FeatureClient.{providerName}") |
| 113 | + }); |
| 114 | + |
| 115 | + builder.Services.TryAddKeyedTransient(providerName, static (services, providerName) => |
| 116 | + { |
| 117 | + var builder = providerName switch |
| 118 | + { |
| 119 | + null => EvaluationContext.Builder(), |
| 120 | + not null => services.GetRequiredKeyedService<EvaluationContextBuilder>(null) |
| 121 | + }; |
| 122 | + |
| 123 | + foreach (var c in services.GetKeyedServices<EvaluationContext>(providerName)) |
| 124 | + { |
| 125 | + builder.Merge(c); |
| 126 | + } |
| 127 | + |
| 128 | + return builder; |
| 129 | + }); |
| 130 | + |
| 131 | + builder.Services.TryAddKeyedTransient<IFeatureClient>(providerName, static (services, providerName) => |
| 132 | + { |
| 133 | + var api = services.GetRequiredService<Api>(); |
| 134 | + |
| 135 | + return api.GetClient( |
| 136 | + api.GetProviderMetadata(providerName as string).Name, |
| 137 | + null, |
| 138 | + services.GetRequiredKeyedService<ILogger>(providerName), |
| 139 | + services.GetRequiredKeyedService<EvaluationContextBuilder>(providerName).Build()); |
| 140 | + }); |
| 141 | + |
| 142 | + if (providerName is not null) |
| 143 | + builder.Services.Replace(ServiceDescriptor.Transient(services => services.GetRequiredKeyedService<IFeatureClient>(providerName))); |
| 144 | + } |
| 145 | +} |
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