From f4ae44b1d9e7c9a8eca07f8c132cbfbe60ae9883 Mon Sep 17 00:00:00 2001
From: Julian Raufelder <Julian@Raufelder.com>
Date: Wed, 2 May 2018 19:25:58 +0200
Subject: [PATCH] Enahnce akka implementation

---
 build.sbt                                     |  2 +
 src/main/scala/de/htwg/se/sudoku/Sudoku.scala | 11 ++-
 .../de/htwg/se/sudoku/aview/HttpServer.scala  | 73 +++++++++++++++++++
 3 files changed, 82 insertions(+), 4 deletions(-)
 create mode 100644 src/main/scala/de/htwg/se/sudoku/aview/HttpServer.scala

diff --git a/build.sbt b/build.sbt
index 55cfbaf..6076c0b 100755
--- a/build.sbt
+++ b/build.sbt
@@ -20,3 +20,5 @@ libraryDependencies += "com.typesafe.play" %% "play-json" % "2.6.6"
 libraryDependencies += "ch.qos.logback" % "logback-classic" % "1.2.3"
 
 libraryDependencies += "com.typesafe.scala-logging" %% "scala-logging" % "3.7.2"
+
+libraryDependencies += "com.typesafe.akka" %% "akka-http" % "10.0.0"
\ No newline at end of file
diff --git a/src/main/scala/de/htwg/se/sudoku/Sudoku.scala b/src/main/scala/de/htwg/se/sudoku/Sudoku.scala
index 8e5926a..f873ee4 100755
--- a/src/main/scala/de/htwg/se/sudoku/Sudoku.scala
+++ b/src/main/scala/de/htwg/se/sudoku/Sudoku.scala
@@ -1,17 +1,19 @@
 package de.htwg.se.sudoku
 
-import com.google.inject.Guice
-import de.htwg.se.sudoku.aview.Tui
+import com.google.inject.{Guice, Injector}
 import de.htwg.se.sudoku.aview.gui.SwingGui
+import de.htwg.se.sudoku.aview.{HttpServer, Tui}
 import de.htwg.se.sudoku.controller.controllerComponent.ControllerInterface
 
 import scala.io.StdIn.readLine
 
 object Sudoku {
-  val injector = Guice.createInjector(new SudokuModule)
-  val controller = injector.getInstance(classOf[ControllerInterface])
+  val injector: Injector = Guice.createInjector(new SudokuModule)
+  val controller: ControllerInterface = injector.getInstance(classOf[ControllerInterface])
   val tui = new Tui(controller)
   val gui = new SwingGui(controller)
+  val webserver = new HttpServer(controller)
+
   controller.createNewGrid
 
   def main(args: Array[String]): Unit = {
@@ -21,5 +23,6 @@ object Sudoku {
       input = readLine()
       tui.processInputLine(input)
     } while (input != "q")
+    webserver.unbind()
   }
 }
diff --git a/src/main/scala/de/htwg/se/sudoku/aview/HttpServer.scala b/src/main/scala/de/htwg/se/sudoku/aview/HttpServer.scala
new file mode 100644
index 0000000..838b663
--- /dev/null
+++ b/src/main/scala/de/htwg/se/sudoku/aview/HttpServer.scala
@@ -0,0 +1,73 @@
+package de.htwg.se.sudoku.aview
+
+import akka.actor.ActorSystem
+import akka.http.scaladsl.Http
+import akka.http.scaladsl.model.{ContentTypes, HttpEntity, StatusCodes}
+import akka.http.scaladsl.server.Directives._
+import akka.http.scaladsl.server.{Route, StandardRoute}
+import akka.stream.ActorMaterializer
+import de.htwg.se.sudoku.controller.controllerComponent.ControllerInterface
+
+import scala.concurrent.{ExecutionContextExecutor, Future}
+
+class HttpServer(controller: ControllerInterface) {
+
+  implicit val system: ActorSystem = ActorSystem("system")
+  implicit val materializer: ActorMaterializer = ActorMaterializer()
+  // needed for the future flatMap/onComplete in the end
+  implicit val executionContext: ExecutionContextExecutor = system.dispatcher
+
+  val route: Route = get {
+    pathSingleSlash {
+      complete(HttpEntity(ContentTypes.`text/plain(UTF-8)`, "<h1>HTWG Sudoku</h1>"))
+    }
+    pathPrefix("sudoku" / "rest" / "v1") {
+      pathEnd {
+        gridtoHtml
+      } ~
+        path("new") {
+          controller.createEmptyGrid
+          gridtoHtml
+        } ~
+        path("solve") {
+          controller.solve
+          gridtoHtml
+        } ~
+        path("undo") {
+          controller.undo
+          gridtoHtml
+        } ~
+        path("redo") {
+          controller.redo
+          gridtoHtml
+        }
+    }
+  } ~
+    post {
+      pathPrefix("sudoku" / "rest" / "v1") {
+        path(Segment) { command => {
+          if (processInputLine(command)) complete(StatusCodes.NoContent) else complete(StatusCodes.BadRequest)
+        }
+        }
+      }
+    }
+
+  def gridtoHtml: StandardRoute = {
+    complete(HttpEntity(ContentTypes.`text/html(UTF-8)`, "<h1>HTWG Sudoku</h1>" + controller.gridToString))
+  }
+
+  val bindingFuture: Future[Http.ServerBinding] = Http().bindAndHandle(route, "localhost", 8080)
+
+  def unbind(): Unit = {
+    bindingFuture
+      .flatMap(_.unbind()) // trigger unbinding from the port
+      .onComplete(_ => system.terminate()) // and shutdown when done
+  }
+
+  def processInputLine(input: String): Boolean = {
+    input.toList.filter(c => c != ' ').map(c => c.toString.toInt) match {
+      case row :: column :: value :: Nil => controller.set(row, column, value); true
+      case _ => false
+    }
+  }
+}