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package com.softwaremill.sttp.asynchttpclient.cats
import java.nio.ByteBuffer
import cats.effect._
import com.softwaremill.sttp.asynchttpclient.AsyncHttpClientHandler
import com.softwaremill.sttp.{MonadAsyncError, SttpHandler}
import org.asynchttpclient.{
AsyncHttpClient,
AsyncHttpClientConfig,
DefaultAsyncHttpClient
}
import org.reactivestreams.Publisher
import scala.language.higherKinds
class AsyncHttpClientCatsHandler[F[_]: Async] private (
asyncHttpClient: AsyncHttpClient,
closeClient: Boolean
) extends AsyncHttpClientHandler[F, Nothing](
asyncHttpClient,
new AsyncMonad,
closeClient
) {
override protected def streamBodyToPublisher(
s: Nothing): Publisher[ByteBuffer] = s // nothing is everything
override protected def publisherToStreamBody(
p: Publisher[ByteBuffer]): Nothing =
throw new IllegalStateException("This handler does not support streaming")
}
object AsyncHttpClientCatsHandler {
def apply[F[_]: Async](): SttpHandler[F, Nothing] =
new AsyncHttpClientCatsHandler(new DefaultAsyncHttpClient(),
closeClient = true)
def usingConfig[F[_]: Async](
cfg: AsyncHttpClientConfig): SttpHandler[F, Nothing] =
new AsyncHttpClientCatsHandler(new DefaultAsyncHttpClient(cfg),
closeClient = true)
def usingClient[F[_]: Async](
client: AsyncHttpClient): SttpHandler[F, Nothing] =
new AsyncHttpClientCatsHandler(client, closeClient = false)
}
private[cats] class AsyncMonad[F[_]](implicit F: Async[F])
extends MonadAsyncError[F] {
override def async[T](
register: ((Either[Throwable, T]) => Unit) => Unit): F[T] =
F.async(register)
override def unit[T](t: T): F[T] = F.pure(t)
override def map[T, T2](fa: F[T], f: (T) => T2): F[T2] = F.map(fa)(f)
override def flatMap[T, T2](fa: F[T], f: (T) => F[T2]): F[T2] =
F.flatMap(fa)(f)
override def error[T](t: Throwable): F[T] = F.raiseError(t)
}
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