smithy4s.http.HttpDiscriminator.scala Maven / Gradle / Ivy
/*
* Copyright 2021-2024 Disney Streaming
*
* Licensed under the Tomorrow Open Source Technology License, Version 1.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://disneystreaming.github.io/TOST-1.0.txt
*
* 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 smithy4s.http
import smithy4s.ShapeId
sealed trait HttpDiscriminator extends Product with Serializable
object HttpDiscriminator {
// format: off
final case class FullId(shapeId: ShapeId) extends HttpDiscriminator
final case class NameOnly(name: String) extends HttpDiscriminator
final case class StatusCode(int: Int) extends HttpDiscriminator
case object Undetermined extends HttpDiscriminator
// format: on
def fromResponse(
discriminatingHeaderNames: List[String],
response: HttpResponse[Any]
): HttpDiscriminator =
fromStatusOrHeader(
discriminatingHeaderNames,
response.statusCode,
response.headers
)
def fromMetadata(
discriminatingHeaderNames: List[String],
metadata: Metadata
): Option[HttpDiscriminator] = {
metadata.statusCode.map(code =>
fromStatusOrHeader(discriminatingHeaderNames, code, metadata.headers)
)
}
def fromStatusOrHeader(
discriminatingHeaderNames: List[String],
statusCode: Int,
headers: Map[CaseInsensitive, Seq[String]]
): HttpDiscriminator = {
discriminatingHeaderNames.iterator
.map(CaseInsensitive(_))
.map(headers.get)
.collectFirst { case Some(h) => h }
.flatMap(_.headOption)
.map(errorType =>
ShapeId
.parse(errorType)
.map(FullId(_))
.getOrElse(NameOnly(errorType))
)
.getOrElse(
StatusCode(statusCode)
)
}
}