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- Add method for deserialisation variant attachments when a variant match is received
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78
...rver/shared/src/main/scala/io/cardell/ff4s/flipt/model/StructuredEvaluationResponse.scala
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| /* | ||
| * Copyright 2023 Alex Cardell | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
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| package io.cardell.ff4s.flipt.model | ||
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| import cats.syntax.all.* | ||
| import io.circe.Decoder | ||
| import io.circe.parser | ||
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| sealed trait AttachmentDecodingError | ||
| object AttachmentDecodingError { | ||
| case object AttachmentJsonParsingError extends AttachmentDecodingError | ||
| case object AttachmentDeserialisationError extends AttachmentDecodingError | ||
| } | ||
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| case class StructuredVariantEvaluationResponse[A]( | ||
| `match`: Boolean, | ||
| segmentKeys: List[String], | ||
| reason: EvaluationReason, | ||
| flagKey: String, | ||
| variantKey: String, | ||
| variantAttachment: Option[A], | ||
| requestDurationMillis: Float, | ||
| timestamp: String | ||
| ) | ||
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| object StructuredVariantEvaluationResponse { | ||
| def apply[A: Decoder]( | ||
| variant: VariantEvaluationResponse | ||
| ): Either[AttachmentDecodingError, StructuredVariantEvaluationResponse[A]] = { | ||
| val maybeAttachment = if (variant.`match`) { | ||
| decodeJsonAttachment(variant.variantAttachment).map(Some(_)) | ||
| } else { | ||
| Option.empty[A].asRight[AttachmentDecodingError] | ||
| } | ||
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| maybeAttachment.map { attachment => | ||
| StructuredVariantEvaluationResponse[A]( | ||
| `match` = variant.`match`, | ||
| segmentKeys = variant.segmentKeys, | ||
| reason = variant.reason, | ||
| flagKey = variant.flagKey, | ||
| variantKey = variant.variantKey, | ||
| variantAttachment = attachment, | ||
| requestDurationMillis = variant.requestDurationMillis, | ||
| timestamp = variant.timestamp | ||
| ) | ||
| } | ||
| } | ||
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| private def decodeJsonAttachment[A: Decoder]( | ||
| string: String | ||
| ): Either[AttachmentDecodingError, A] = { | ||
| import AttachmentDecodingError.* | ||
| for { | ||
| json <- parser | ||
| .parse(string) | ||
| .leftMap(_ => AttachmentJsonParsingError) | ||
| attachment <- json | ||
| .as[A] | ||
| .leftMap(_ => AttachmentDeserialisationError) | ||
| } yield attachment | ||
| } | ||
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| } |