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package xyz.driver.pdsuidomain.formats.json.sprayformats
import java.time.LocalDateTime
import spray.json._
import spray.json.DefaultJsonProtocol._
import xyz.driver.pdsuicommon.db.Pagination
import xyz.driver.pdsuidomain.formats.json.sprayformats.common._
final case class ListResponse[+T](items: Seq[T], meta: ListResponse.Meta)
object ListResponse {
private val itemsField = "items"
private val metaField = "meta"
final case class Meta(itemsCount: Int, pageNumber: Int, pageSize: Int, lastUpdate: Option[LocalDateTime])
object Meta {
def apply(itemsCount: Int, pagination: Pagination, lastUpdate: Option[LocalDateTime]): Meta = {
Meta(
itemsCount,
pagination.pageNumber,
pagination.pageSize,
lastUpdate
)
}
}
implicit val listResponseMetaFormat: RootJsonFormat[Meta] = jsonFormat4(Meta.apply)
implicit def listResponseWriter[T: JsonWriter]: RootJsonWriter[ListResponse[T]] =
new RootJsonWriter[ListResponse[T]] {
override def write(listResponse: ListResponse[T]): JsValue = {
JsObject(
itemsField -> listResponse.items.map(_.toJson).toJson,
metaField -> listResponse.meta.toJson
)
}
}
implicit def listResponseReader[T: JsonReader]: RootJsonReader[ListResponse[T]] =
new RootJsonReader[ListResponse[T]] {
override def read(json: JsValue): ListResponse[T] = json match {
case JsObject(fields) =>
val items = fields
.get(itemsField)
.map {
case JsArray(elements) => elements.map(_.convertTo[T])(collection.breakOut)
case x => deserializationError(s"Expected Array as JsArray, but got $x")
}
.getOrElse(deserializationError(s"ListResponse json object does not contain `$itemsField` field: $json"))
val meta = fields
.get(metaField)
.map(_.convertTo[Meta])
.getOrElse(deserializationError(s"ListResponse json object does not contain `$metaField` field: $json"))
ListResponse(items, meta)
case _ => deserializationError(s"Expected ListResponse json object, but got $json")
}
}
}
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