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package com.lihaoyi.workbench
import akka.actor.{ActorRef, Actor, ActorSystem}
import com.typesafe.config.ConfigFactory
import sbt.IO
import spray.routing.SimpleRoutingApp
import akka.actor.ActorDSL._
import upickle.{Reader, Writer, Js}
import spray.http.{AllOrigins, HttpResponse}
import spray.http.HttpHeaders.`Access-Control-Allow-Origin`
import concurrent.duration._
import scala.concurrent.Future
class Server(url: String, port: Int, bootSnippet: String) extends SimpleRoutingApp{
implicit val system = ActorSystem(
"Workbench-System",
config = ConfigFactory.load(ActorSystem.getClass.getClassLoader),
classLoader = ActorSystem.getClass.getClassLoader
)
object Wire extends autowire.Client[Js.Value, upickle.Reader, upickle.Writer]{
def doCall(req: Request): Future[Js.Value] = {
pubSub ! Js.Arr(upickle.writeJs(req.path), Js.Obj(req.args.toSeq:_*))
Future.successful(Js.Null)
}
def write[Result: Writer](r: Result) = upickle.writeJs(r)
def read[Result: Reader](p: Js.Value) = upickle.readJs[Result](p)
}
private val pubSub = actor(new Actor{
var waitingActor: Option[ActorRef] = None
var queuedMessages = List[Js.Value]()
case object Clear
import system.dispatcher
system.scheduler.schedule(0 seconds, 10 seconds, self, Clear)
def respond(a: ActorRef, s: String) = {
a ! HttpResponse(
entity = s,
headers = List(`Access-Control-Allow-Origin`(AllOrigins))
)
}
def receive = (x: Any) => (x, waitingActor, queuedMessages) match {
case (a: ActorRef, _, Nil) =>
// Even if there's someone already waiting,
// a new actor waiting replaces the old one
waitingActor = Some(a)
case (a: ActorRef, None, msgs) =>
respond(a, upickle.json.write(Js.Arr(msgs:_*)))
queuedMessages = Nil
case (msg: Js.Arr, None, msgs) =>
queuedMessages = msg :: msgs
case (msg: Js.Arr, Some(a), Nil) =>
respond(a, upickle.json.write(Js.Arr(msg)))
waitingActor = None
case (Clear, Some(a), Nil) =>
respond(a, upickle.json.write(Js.Arr()))
waitingActor = None
}
})
startServer(url, port) {
get {
path("workbench.js") {
complete {
val body = IO.readStream(
getClass.getClassLoader.getResourceAsStream("client-opt.js")
)
s"""
(function(){
$body
WorkbenchClient().main(${upickle.write(bootSnippet)}, ${upickle.write(url)}, ${upickle.write(port)})
}).call(this)
"""
}
} ~
getFromDirectory(".")
} ~
post {
path("notifications") { ctx =>
pubSub ! ctx.responder
}
}
}
def kill() = {
system.shutdown()
}
}
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