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feat: Introduce flipt provider for dotnet (#293)
Signed-off-by: Andrei de la Cruz <andrei.delacruz@gmail.com>
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49 changes: 49 additions & 0 deletions
49
src/OpenFeature.Contrib.Providers.Flipt/ClientWrapper/FliptClientWrapper.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| using System; | ||
| using System.Net.Http; | ||
| using System.Threading.Tasks; | ||
| using Flipt.Rest; | ||
|
|
||
| namespace OpenFeature.Contrib.Providers.Flipt.ClientWrapper; | ||
|
|
||
| /// <summary> | ||
| /// Wrapper for Flipt server sdk client for .net | ||
| /// </summary> | ||
| public class FliptClientWrapper : IFliptClientWrapper | ||
| { | ||
| private readonly FliptRestClient _fliptRestClient; | ||
|
|
||
| /// <summary> | ||
| /// </summary> | ||
| /// <param name="fliptUrl">Url of flipt instance</param> | ||
| /// <param name="clientToken">Authentication access token</param> | ||
| /// <param name="timeoutInSeconds">Timeout when calling flipt endpoints in seconds</param> | ||
| public FliptClientWrapper(string fliptUrl, | ||
| string clientToken = "", | ||
| int timeoutInSeconds = 30) | ||
| { | ||
| _fliptRestClient = BuildClient(fliptUrl, clientToken, timeoutInSeconds); | ||
| } | ||
|
|
||
| /// <inheritdoc /> | ||
| public async Task<VariantEvaluationResponse> EvaluateVariantAsync(EvaluationRequest evaluationRequest) | ||
| { | ||
| return await _fliptRestClient.EvaluateV1VariantAsync(evaluationRequest); | ||
| } | ||
|
|
||
| /// <inheritdoc /> | ||
| public async Task<BooleanEvaluationResponse> EvaluateBooleanAsync(EvaluationRequest evaluationRequest) | ||
| { | ||
| return await _fliptRestClient.EvaluateV1BooleanAsync(evaluationRequest); | ||
| } | ||
|
|
||
| private static FliptRestClient BuildClient(string fliptUrl, string clientToken, int timeoutInSeconds = 30) | ||
| { | ||
| var httpClient = new HttpClient | ||
| { | ||
| BaseAddress = new Uri(fliptUrl), | ||
| Timeout = TimeSpan.FromSeconds(timeoutInSeconds), | ||
| DefaultRequestHeaders = { { "Authorization", $"Bearer {clientToken}" } } | ||
| }; | ||
| return new FliptRestClient(httpClient); | ||
| } | ||
| } |
23 changes: 23 additions & 0 deletions
23
src/OpenFeature.Contrib.Providers.Flipt/ClientWrapper/IFliptClientWrapper.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| using System.Threading.Tasks; | ||
| using Flipt.Rest; | ||
|
|
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| namespace OpenFeature.Contrib.Providers.Flipt.ClientWrapper; | ||
|
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| /// <summary> | ||
| /// </summary> | ||
| public interface IFliptClientWrapper | ||
| { | ||
| /// <summary> | ||
| /// Wrapper to Flipt.io/EvaluateVariantAsync method | ||
| /// </summary> | ||
| /// <param name="evaluationRequest"></param> | ||
| /// <returns></returns> | ||
| Task<VariantEvaluationResponse> EvaluateVariantAsync(EvaluationRequest evaluationRequest); | ||
|
|
||
| /// <summary> | ||
| /// Wrapper to Flipt.io/EvaluateBooleanAsync method | ||
| /// </summary> | ||
| /// <param name="evaluationRequest"></param> | ||
| /// <returns></returns> | ||
| Task<BooleanEvaluationResponse> EvaluateBooleanAsync(EvaluationRequest evaluationRequest); | ||
| } |
23 changes: 23 additions & 0 deletions
23
src/OpenFeature.Contrib.Providers.Flipt/Converters/JsonConverterExtensions.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| using System.Text.Json; | ||
|
|
||
| namespace OpenFeature.Contrib.Providers.Flipt.Converters; | ||
|
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| /// <summary> | ||
| /// Extensions for default JsonConverter behavior | ||
| /// </summary> | ||
| public static class JsonConverterExtensions | ||
| { | ||
| /// <summary> | ||
| /// JsonConverter serializer settings for Flipt to OpenFeature model deserialization | ||
| /// </summary> | ||
| public static readonly JsonSerializerOptions DefaultSerializerSettings = new() | ||
| { | ||
| WriteIndented = true, | ||
| AllowTrailingCommas = true, | ||
| Converters = | ||
| { | ||
| new OpenFeatureStructureConverter(), | ||
| new OpenFeatureValueConverter() | ||
| } | ||
| }; | ||
| } |
30 changes: 30 additions & 0 deletions
30
src/OpenFeature.Contrib.Providers.Flipt/Converters/OpenFeatureStructureConverter.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Text.Json; | ||
| using System.Text.Json.Serialization; | ||
| using OpenFeature.Model; | ||
|
|
||
| namespace OpenFeature.Contrib.Providers.Flipt.Converters; | ||
|
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| /// <summary> | ||
| /// JsonConverter for OpenFeature Structure type | ||
| /// </summary> | ||
| public class OpenFeatureStructureConverter : JsonConverter<Structure> | ||
| { | ||
| /// <inheritdoc /> | ||
| public override void Write(Utf8JsonWriter writer, Structure value, JsonSerializerOptions options) | ||
| { | ||
| var jsonDoc = JsonDocument.Parse(JsonSerializer.Serialize(value.AsDictionary(), | ||
| JsonConverterExtensions.DefaultSerializerSettings)); | ||
| jsonDoc.WriteTo(writer); | ||
| } | ||
|
|
||
| /// <inheritdoc /> | ||
| public override Structure Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) | ||
| { | ||
| using var jsonDocument = JsonDocument.ParseValue(ref reader); | ||
| var jsonText = jsonDocument.RootElement.GetRawText(); | ||
| return new Structure(JsonSerializer.Deserialize<Dictionary<string, Value>>(jsonText, | ||
| JsonConverterExtensions.DefaultSerializerSettings)); | ||
| } | ||
| } |
102 changes: 102 additions & 0 deletions
102
src/OpenFeature.Contrib.Providers.Flipt/Converters/OpenFeatureValueConverter.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Text.Json; | ||
| using System.Text.Json.Serialization; | ||
| using OpenFeature.Model; | ||
|
|
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| namespace OpenFeature.Contrib.Providers.Flipt.Converters; | ||
|
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| /// <summary> | ||
| /// OpenFeature Value type converter | ||
| /// </summary> | ||
| public class OpenFeatureValueConverter : JsonConverter<Value> | ||
| { | ||
| /// <inheritdoc /> | ||
| public override Value Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) | ||
| { | ||
| var value = new Value(); | ||
| switch (reader.TokenType) | ||
| { | ||
| case JsonTokenType.String: | ||
| return reader.TryGetDateTime(out var dateTimeValue) | ||
| ? new Value(dateTimeValue) | ||
| : new Value(reader.GetString() ?? string.Empty); | ||
| case JsonTokenType.True: | ||
| case JsonTokenType.False: | ||
| return new Value(reader.GetBoolean()); | ||
| case JsonTokenType.Number: | ||
| if (reader.TryGetInt32(out var intValue)) return new Value(intValue); | ||
| if (reader.TryGetDouble(out var dblValue)) return new Value(dblValue); | ||
| break; | ||
| case JsonTokenType.StartArray: | ||
| return new Value(GenerateValueArray(ref reader, typeToConvert, options)); | ||
| case JsonTokenType.StartObject: | ||
| return new Value(GetStructure(ref reader, typeToConvert, options)); | ||
| } | ||
|
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| return value; | ||
| } | ||
|
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| private Structure GetStructure(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) | ||
| { | ||
| var startDepth = reader.CurrentDepth; | ||
| var structureDictionary = new Dictionary<string, Value>(); | ||
| while (reader.Read()) | ||
| { | ||
| if (reader.TokenType == JsonTokenType.PropertyName) | ||
| { | ||
| var key = reader.GetString(); | ||
| reader.Read(); | ||
| var val = Read(ref reader, typeToConvert, options); | ||
| structureDictionary[key ?? string.Empty] = val; | ||
| } | ||
|
|
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| if (reader.TokenType == JsonTokenType.EndObject && reader.CurrentDepth == startDepth) break; | ||
| } | ||
|
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| return new Structure(structureDictionary); | ||
| } | ||
|
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|
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| private IList<Value> GenerateValueArray(ref Utf8JsonReader reader, Type typeToConvert, | ||
| JsonSerializerOptions options) | ||
| { | ||
| var valuesArray = new List<Value>(); | ||
| var startDepth = reader.CurrentDepth; | ||
|
|
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| while (reader.Read()) | ||
| switch (reader.TokenType) | ||
| { | ||
| case JsonTokenType.EndArray when reader.CurrentDepth == startDepth: | ||
| return valuesArray; | ||
| default: | ||
| valuesArray.Add(Read(ref reader, typeToConvert, options)); | ||
| break; | ||
| } | ||
|
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| return valuesArray; | ||
| } | ||
|
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| /// <inheritdoc /> | ||
| public override void Write(Utf8JsonWriter writer, Value value, JsonSerializerOptions options) | ||
| { | ||
| if (value.IsList) | ||
| { | ||
| writer.WriteStartArray(); | ||
| foreach (var val in value.AsList!) | ||
| { | ||
| var jsonDoc = JsonDocument.Parse(JsonSerializer.Serialize(val.AsObject, | ||
| JsonConverterExtensions.DefaultSerializerSettings)); | ||
| jsonDoc.WriteTo(writer); | ||
| } | ||
|
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| writer.WriteEndArray(); | ||
| } | ||
| else | ||
| { | ||
| var jsonDoc = JsonDocument.Parse(JsonSerializer.Serialize(value.AsObject, | ||
| JsonConverterExtensions.DefaultSerializerSettings)); | ||
| jsonDoc.WriteTo(writer); | ||
| } | ||
| } | ||
| } |
27 changes: 27 additions & 0 deletions
27
src/OpenFeature.Contrib.Providers.Flipt/FliptExtensions.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Text.Json; | ||
| using OpenFeature.Contrib.Providers.Flipt.Converters; | ||
| using OpenFeature.Model; | ||
|
|
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| namespace OpenFeature.Contrib.Providers.Flipt; | ||
|
|
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| /// <summary> | ||
| /// Extension helper methods | ||
| /// </summary> | ||
| public static class FliptExtensions | ||
| { | ||
| /// <summary> | ||
| /// Transforms openFeature EvaluationContext to a mutable Dictionary that flipt sdk accepts | ||
| /// </summary> | ||
| /// <param name="evaluationContext">OpenFeature EvaluationContext</param> | ||
| /// <returns></returns> | ||
| public static Dictionary<string, string> ToStringDictionary(this EvaluationContext evaluationContext) | ||
| { | ||
| return evaluationContext?.AsDictionary() | ||
| .ToDictionary(k => k.Key, | ||
| v => JsonSerializer.Serialize(v.Value.AsObject, | ||
| JsonConverterExtensions.DefaultSerializerSettings)) ?? | ||
| []; | ||
| } | ||
| } |
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