io.cardell.ff4s.flipt.model.StructuredEvaluationResponse.scala Maven / Gradle / Ivy
/*
* 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.
*/
package io.cardell.flipt.model
import cats.syntax.all._
import io.circe.Decoder
import io.circe.parser
sealed trait AttachmentDecodingError
object AttachmentDecodingError {
case object AttachmentJsonParsingError extends AttachmentDecodingError
case object AttachmentDeserialisationError extends AttachmentDecodingError
}
case class StructuredVariantEvaluationResponse[A](
`match`: Boolean,
segmentKeys: List[String],
reason: EvaluationReason,
flagKey: String,
variantKey: String,
variantAttachment: Option[A],
requestDurationMillis: Float,
timestamp: String
)
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]
}
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
)
}
}
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
}
}