From 2fd4f39be095a4116fde7dc383db0eba90b3b6c6 Mon Sep 17 00:00:00 2001
From: Dmitry Jemerov <yole@jetbrains.com>
Date: Mon, 30 May 2011 16:28:05 +0400
Subject: [PATCH] colossal cave WIP

---
 examples/src/collections/ColossalCave.jetl | 120 ++++++++++++++++-----
 1 file changed, 91 insertions(+), 29 deletions(-)

diff --git a/examples/src/collections/ColossalCave.jetl b/examples/src/collections/ColossalCave.jetl
index 6be87bbc1b8..7cfacffcda7 100644
--- a/examples/src/collections/ColossalCave.jetl
+++ b/examples/src/collections/ColossalCave.jetl
@@ -1,29 +1,91 @@
-namespace ColossalCave;
-
-class World() {
-  class Room {
-    abstract val name: String
-  }
-
-  val atEndOfRoad: Room
-
-  class AtEndOfRoad(): Room {
-    val name: String = "At End of Road"
-  }
-
-  {
-    atEndOfRoad = new AtEndOfRoad()
-  }
-
-  fun startRoom() = atEndOfRoad
-}
-
-class Player(var room: World.Room) {
-
-}
-
-fun main(args: Array<String>) {
-  val w = new World()
-  val p = new Player(w.startRoom())
-  System.out?.println(p.room.name)
-}
+namespace ColossalCave;
+
+import java.io.*
+
+class World() {
+  class Room {
+    public abstract val name: String
+    public val west: Room? get() = null
+    public val east: Room? get() = null
+  }
+
+  public val atEndOfRoad: Room
+  public val atHillInRoad: Room
+
+  class AtEndOfRoad(): Room {
+    public val name: String = "At End of Road"
+    public val west: Room? get() = atHillInRoad
+  }
+
+  class AtHillInRoad(): Room {
+    public val name: String = "At Hill in Road"
+    public val east: Room? get() = atEndOfRoad
+  }
+
+  {
+    atEndOfRoad = new AtEndOfRoad()
+    atHillInRoad = new AtHillInRoad()
+  }
+
+  fun startRoom() = atEndOfRoad
+}
+
+class Player(var room: World.Room) {
+
+}
+
+class Command {
+  abstract fun execute(p: Player): Unit
+}
+
+class QuitCommand() : Command {
+  fun execute(p: Player): Unit {
+    System.exit(0)
+  }
+}
+
+class MoveCommand: Command {
+  fun moveTo(p: Player, room: World.Room?) {
+    if (room === null) {
+      System.out?.println("You can't go that way")
+      return
+    }
+    p.room = room as World.Room
+    System.out?.println(p.room.name)
+  }
+}
+
+class WestCommand(): MoveCommand {
+  fun execute(p: Player): Unit {
+    moveTo(p, p.room.west)
+  }
+}
+
+class EastCommand(): MoveCommand {
+  fun execute(p: Player): Unit {
+    moveTo(p, p.room.east)
+  }
+}
+
+fun parse(cmd: String): Command? {
+  if (cmd == "quit") return new QuitCommand()
+  if (cmd == "west") return new WestCommand()
+  if (cmd == "east") return new EastCommand()
+  return null
+}
+
+fun main(args: Array<String>) {
+  val w = new World()
+  val p = new Player(w.startRoom())
+  System.out?.println(p.room.name)
+  val reader = new BufferedReader(new InputStreamReader(System.`in`))
+  while(true) {
+    System.out?.print("> ")
+    val cmd = reader.readLine() as String
+    val command = parse(cmd)
+    if (command === null)
+      System.out?.println("Unrecognized command");
+    else
+      command?.execute(p)
+  }
+}