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package com.lihaoyi.workbench
import akka.actor.{Props, ActorRef, Actor, ActorSystem}
import akka.io
import akka.util.ByteString
import play.api.libs.json.JsArray
import java.nio.file.{Files, Paths}
import play.api.libs.json.Json
import spray.can.Http
import spray.can.server.websockets.model.Frame
import spray.can.server.websockets.model.OpCode
import spray.can.server.websockets.Sockets
import sbt._
import Keys._
import com.typesafe.config.ConfigFactory
import scala.collection.mutable
import akka.io.Tcp
import spray.http._
import spray.http.HttpHeaders.{`Access-Control-Allow-Origin`, Connection}
import spray.can.server.websockets.model.OpCode.Text
import spray.http.HttpRequest
import play.api.libs.json.JsArray
import spray.http.HttpResponse
import java.io.IOException
object Plugin extends sbt.Plugin {
val refreshBrowsers = taskKey[Unit]("Sends a message to all connected web pages asking them to refresh the page")
val updateBrowsers = taskKey[Unit]("partially resets some of the stuff in the browser")
val generateClient = taskKey[File]("generates a .js file that can be embedded in your web page")
val localUrl = settingKey[(String, Int)]("localUrl")
private[this] val server = settingKey[ActorRef]("local websocket server")
val fileName = settingKey[String]("name of the generated javascript file")
val bootSnippet = settingKey[String]("piece of javascript to make things happen")
implicit val system = ActorSystem(
"SystemLol",
config = ConfigFactory.load(ActorSystem.getClass.getClassLoader),
classLoader = ActorSystem.getClass.getClassLoader
)
implicit class pimpedActor(server: ActorRef){
def send(x: JsArray) = {
server ! Frame(
opcode = OpCode.Text,
data = ByteString(x.toString())
)
}
}
val buildSettingsX = Seq(
localUrl := ("localhost", 12345),
fileName := "workbench.js",
server := {
implicit val server = system.actorOf(Props(new SocketServer()))
val host = localUrl.value
io.IO(Sockets) ! Http.Bind(server, host._1, host._2)
server
},
extraLoggers := {
val clientLogger = FullLogger{
new Logger {
def log(level: Level.Value, message: => String): Unit =
if(level >= Level.Info) server.value.send(Json.arr("print", level.toString(), message))
def success(message: => String): Unit = server.value.send(Json.arr("print", "info", message))
def trace(t: => Throwable): Unit = server.value.send(Json.arr("print", "error", t.toString))
}
}
clientLogger.setSuccessEnabled(true)
val currentFunction = extraLoggers.value
(key: ScopedKey[_]) => clientLogger +: currentFunction(key)
},
refreshBrowsers := {
streams.value.log.info("workbench: Reloading Pages...")
server.value.send(Json.arr("reload"))
},
updateBrowsers := {
server.value send Json.arr("clear")
((crossTarget in Compile).value * "*.js").get.map{ (x: File) =>
streams.value.log.info("workbench: Checking " + x.getName)
FileFunction.cached(streams.value.cacheDirectory / x.getName, FilesInfo.lastModified, FilesInfo.lastModified){ (f: Set[File]) =>
streams.value.log.info("workbench: Refreshing " + x.getName)
val cwd = Paths.get(new File("").getAbsolutePath)
val filePath = Paths.get(f.head.getAbsolutePath)
server.value send Json.arr(
"run",
"/" + cwd.relativize(filePath).toString,
bootSnippet.value
)
f
}(Set(x))
}
},
generateClient := {
FileFunction.cached(streams.value.cacheDirectory / "workbench"/ "workbench.js", FilesInfo.full, FilesInfo.exists){ (f: Set[File]) =>
val transformed =
IO.read(f.head)
.replace("<host>", localUrl.value._1)
.replace("<port>", localUrl.value._2.toString)
.replace("<bootSnippet>", bootSnippet.value)
val outputFile = (crossTarget in Compile).value / fileName.value
IO.write(outputFile, transformed)
Set(outputFile)
}(Set(new File(getClass.getClassLoader.getResource("workbench_template.ts").toURI))).head
}
)
class SocketServer() extends Actor{
val sockets: mutable.Set[ActorRef] = mutable.Set.empty
def receive = {
case x: Tcp.Connected => sender ! Tcp.Register(self) // normal Http server init
case req: HttpRequest =>
// Upgrade the connection to websockets if you think the incoming
// request looks good
if (req.headers.contains(Connection("Upgrade"))){
sender ! Sockets.UpgradeServer(Sockets.acceptAllFunction(req), self)
}else{
try{
val data = Files.readAllBytes(
Paths.get(req.uri.path.toString.drop(1))
)
val mimeType: ContentType = req.uri.path.toString.split('.').lastOption match {
case Some("css") => MediaTypes.`text/css`
case Some("html") => MediaTypes.`text/html`
case Some("js") => MediaTypes.`application/javascript`
case _ => ContentTypes.`text/plain`
}
sender ! HttpResponse(
StatusCodes.OK,
entity=HttpEntity.apply(mimeType, data),
headers=List(
`Access-Control-Allow-Origin`(spray.http.AllOrigins)
)
)
}catch{case _: IOException =>
sender ! HttpResponse(StatusCodes.NotFound)
}
}
case Sockets.Upgraded =>
sockets.add(sender)
println("Browser Open n=" + sockets.size)
self send Json.arr("boot")
case f @ Frame(fin, rsv, Text, maskingKey, data) =>
sockets.foreach(_ ! f.copy(maskingKey=None))
case _: Tcp.ConnectionClosed =>
if (sockets.contains(sender)) println("Browser Closed n=" + sockets.size )
sockets.remove(sender)
case x =>
}
}
}
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