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package cask.endpoints
import java.io.ByteArrayOutputStream
import cask.internal.{Router, Util}
import cask.main.Endpoint
import cask.model.{Request, Response}
sealed trait JsReader[T] extends Router.ArgReader[ujson.Value, T, cask.model.Request]
object JsReader{
implicit def defaultJsReader[T: upickle.default.Reader] = new JsReader[T]{
def arity = 1
def read(ctx: cask.model.Request, label: String, input: ujson.Value): T = {
val reader = implicitly[upickle.default.Reader[T]]
upickle.default.read[T](input)(reader)
}
}
implicit def paramReader[T: ParamReader] = new JsReader[T] {
override def arity = 0
override def read(ctx: cask.model.Request, label: String, v: ujson.Value) = {
implicitly[ParamReader[T]].read(ctx, label, Nil)
}
}
}
class postJson(val path: String, override val subpath: Boolean = false) extends Endpoint{
type Output = Response
val methods = Seq("post")
type Input = ujson.Js.Value
type InputParser[T] = JsReader[T]
def wrapFunction(ctx: Request,
delegate: Map[String, Input] => Router.Result[Output]): Router.Result[Response] = {
val obj = for{
str <-
try {
val boas = new ByteArrayOutputStream()
Util.transferTo(ctx.exchange.getInputStream, boas)
Right(new String(boas.toByteArray))
}
catch{case e: Throwable => Left(cask.model.Response(
"Unable to deserialize input JSON text: " + e + "\n" + Util.stackTraceString(e)
))}
json <-
try Right(ujson.read(str))
catch{case e: Throwable => Left(cask.model.Response(
"Input text is invalid JSON: " + e + "\n" + Util.stackTraceString(e)
))}
obj <-
try Right(json.obj)
catch {case e: Throwable => Left(cask.model.Response("Input JSON must be a dictionary"))}
} yield obj.toMap
obj match{
case Left(r) => Router.Result.Success(r)
case Right(params) => delegate(params)
}
}
def wrapPathSegment(s: String): Input = ujson.Js.Str(s)
}
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