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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 scala.Some
import upickle.{Writer, Json, Js}
import spray.http.{AllOrigins, HttpResponse}
import spray.http.HttpHeaders.`Access-Control-Allow-Origin`
import concurrent.duration._
class Server(url: String, port: Int, bootSnippet: String) extends SimpleRoutingApp{
implicit val system = ActorSystem(
"SystemLol",
config = ConfigFactory.load(ActorSystem.getClass.getClassLoader),
classLoader = ActorSystem.getClass.getClassLoader
)
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, Json.write(Js.Array(msgs)))
queuedMessages = Nil
case (msg: Js.Array, None, msgs) =>
queuedMessages = msg :: msgs
case (msg: Js.Array, Some(a), Nil) =>
respond(a, Json.write(Js.Array(Seq(msg))))
waitingActor = None
case (Clear, Some(a), Nil) =>
respond(a, Json.write(Js.Array(Nil)))
waitingActor = None
}
})
startServer(url, port) {
get {
path("workbench.js") {
complete {
IO.readStream(
getClass.getClassLoader
.getResourceAsStream("workbench_template.js")
).replace("<host>", url)
.replace("<port>", port.toString)
.replace("<bootSnippet>", bootSnippet)
}
} ~
getFromDirectory(".")
} ~
post {
path("notifications") { ctx =>
pubSub ! ctx.responder
}
}
}
def msg[T: Writer](t: T) = {
pubSub ! upickle.writeJs(t)
}
}
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