Complete most of networked tick-tac-toe. Finish the questions to ponder!

Exercises/NetworkedTicTacToe/core/src/main/kotlin/u0012604/tictactoe/GameMessageType.kt

@@ -12,7 +12,9 @@ interface Deserializable {
 
 enum class GameMessageType(val id: Byte) {
     JOIN_GAME(1),
-    PLACE_TOKEN(2);
+    PLACE_TOKEN(2),
+    START_GAME(3),
+    GAME_OVER(4);
 
     companion object {
         fun fromByte(id: Byte) = entries.first { it.id == id }
@@ -23,6 +25,9 @@ sealed class GameMessage(val type: GameMessageType) : Serializable {
 
     override fun serialize() = byteArrayOf(type.id)
 
+    object StartGameMessage : GameMessage(GameMessageType.START_GAME)
+    object GameOverMessage : GameMessage(GameMessageType.GAME_OVER)
+
     // -----------------------------------------------------------------------------------------------
     data class JoinGameMessage(val token: Token) : GameMessage(GameMessageType.JOIN_GAME) {
 

Exercises/NetworkedTicTacToe/core/src/main/kotlin/u0012604/tictactoe/Main.kt

@@ -20,11 +20,11 @@ class Main : KtxGame<KtxScreen>() {
     override fun create() {
         KtxAsync.initiate()
 
-        networkHandler = NetworkHandler("A.B.C.D", 4300, serverChannel, clientChannel)
+        networkHandler = NetworkHandler("152.105.66.120", 4331, serverChannel, clientChannel)
 
         addScreen(FirstScreen(this, clientChannel, serverChannel))
 
-        addScreen(GameOverScreen())
+        addScreen(GameOverScreen(0))
 
         setScreen<FirstScreen>()
 

Exercises/NetworkedTicTacToe/core/src/main/kotlin/u0012604/tictactoe/networking/NetworkHandler.kt

@@ -153,6 +153,10 @@ class NetworkHandler(
             GameMessageType.JOIN_GAME -> GameMessage.JoinGameMessage.deserialize(this)
 
             GameMessageType.PLACE_TOKEN -> GameMessage.PlaceTokenMessage.deserialize(this)
+
+            GameMessageType.START_GAME -> GameMessage.StartGameMessage
+
+            GameMessageType.GAME_OVER -> GameMessage.GameOverMessage
         }
     }
 

Exercises/NetworkedTicTacToe/core/src/main/kotlin/u0012604/tictactoe/screens/FirstScreen.kt

@@ -27,6 +27,9 @@ class FirstScreen(
     private val receiveChannel: ReceiveChannel<GameMessage>,
     private val sendChannel: SendChannel<GameMessage>
 ) : KtxScreen, InputProcessor {
+    private var gameStarted = false
+
+    private var gameOver = false
 
     private val batch = SpriteBatch()
 
@@ -56,6 +59,12 @@ class FirstScreen(
     override fun render(delta: Float) {
         clearScreen(red = 0.7f, green = 0.7f, blue = 0.7f)
 
+        if (gameOver) {
+            game.setScreen<GameOverScreen>()
+            disposeSafely()
+            return
+        }
+
         camera.update()
 
         batch.use { board.draw(it) }
@@ -87,6 +96,18 @@ class FirstScreen(
                         localPlayerTurn = true
                     }
 
+                    is GameMessage.StartGameMessage -> {
+                        Gdx.app.log(TAG, "The Server has started the game")
+
+                        gameStarted = true
+                    }
+
+                    is GameMessage.GameOverMessage -> {
+                        Gdx.app.log(TAG, "The Server has sent Game Over")
+
+                        gameStarted = false
+                        gameOver = true
+                    }
                 }
 
                 Gdx.app.log(TAG, "THE MESSAGE RECEIVED IS: $gm")
@@ -114,7 +135,7 @@ class FirstScreen(
         button: Int
     ): Boolean {
 
-        if(!localPlayerTurn)
+        if(!gameStarted || !localPlayerTurn)
             return true;
 
         val col = ((screenX.toFloat() / Gdx.graphics.width) * 3).toInt()

Exercises/NetworkedTicTacToe/core/src/main/kotlin/u0012604/tictactoe/screens/GameOverScreen.kt

@@ -6,16 +6,25 @@ import ktx.app.KtxScreen
 import ktx.app.clearScreen
 import ktx.graphics.use
 
-class GameOverScreen  : KtxScreen {
-
+class GameOverScreen(private val winType: Int)  : KtxScreen {
+    private var label = winType.toString()
     private val font = BitmapFont()
     private val batch = SpriteBatch()
 
+    override fun show() {
+        when (winType) {
+            0 -> label = "You Win!"
+            1 -> label = "You Lose."
+            2 -> label = "Game Over!"
+            else -> "Invalid type!"
+        }
+    }
+
     override fun render(delta: Float) {
         clearScreen(red = 0.7f, green = 0.7f, blue = 0.7f)
 
         batch.use {
-            font.draw(it, "Game Over!", 10f, 10f)
+            font.draw(it, label, 10f, 10f)
         }
     }
 }