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package com.softwaremill.sttp.asynchttpclient.scalaz
import java.nio.ByteBuffer
import com.softwaremill.sttp.asynchttpclient.AsyncHttpClientBackend
import com.softwaremill.sttp.{FollowRedirectsBackend, MonadAsyncError, SttpBackend, SttpBackendOptions}
import io.netty.buffer.ByteBuf
import org.asynchttpclient.{AsyncHttpClient, AsyncHttpClientConfig, DefaultAsyncHttpClient}
import org.reactivestreams.Publisher
import scalaz.concurrent.Task
import scalaz.{-\/, \/-}
class AsyncHttpClientScalazBackend private (asyncHttpClient: AsyncHttpClient, closeClient: Boolean)
extends AsyncHttpClientBackend[Task, Nothing](asyncHttpClient, TaskMonad, closeClient) {
override protected def streamBodyToPublisher(s: Nothing): Publisher[ByteBuf] =
s // nothing is everything
override protected def publisherToStreamBody(p: Publisher[ByteBuffer]): Nothing =
throw new IllegalStateException("This backend does not support streaming")
override protected def publisherToString(p: Publisher[ByteBuffer]): Task[String] =
throw new IllegalStateException("This backend does not support streaming")
}
object AsyncHttpClientScalazBackend {
private def apply(asyncHttpClient: AsyncHttpClient, closeClient: Boolean): SttpBackend[Task, Nothing] =
new FollowRedirectsBackend[Task, Nothing](new AsyncHttpClientScalazBackend(asyncHttpClient, closeClient))
def apply(options: SttpBackendOptions = SttpBackendOptions.Default): SttpBackend[Task, Nothing] =
AsyncHttpClientScalazBackend(AsyncHttpClientBackend.defaultClient(options), closeClient = true)
def usingConfig(cfg: AsyncHttpClientConfig): SttpBackend[Task, Nothing] =
AsyncHttpClientScalazBackend(new DefaultAsyncHttpClient(cfg), closeClient = true)
def usingClient(client: AsyncHttpClient): SttpBackend[Task, Nothing] =
AsyncHttpClientScalazBackend(client, closeClient = false)
}
private[scalaz] object TaskMonad extends MonadAsyncError[Task] {
override def unit[T](t: T): Task[T] = Task.point(t)
override def map[T, T2](fa: Task[T])(f: (T) => T2): Task[T2] = fa.map(f)
override def flatMap[T, T2](fa: Task[T])(f: (T) => Task[T2]): Task[T2] =
fa.flatMap(f)
override def async[T](register: ((Either[Throwable, T]) => Unit) => Unit): Task[T] =
Task.async { cb =>
register {
case Left(t) => cb(-\/(t))
case Right(t) => cb(\/-(t))
}
}
override def error[T](t: Throwable): Task[T] = Task.fail(t)
override protected def handleWrappedError[T](rt: Task[T])(h: PartialFunction[Throwable, Task[T]]): Task[T] =
rt.handleWith(h)
}
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