From 060d36a02e06fdc2943c8ff0b915057d50a13cb7 Mon Sep 17 00:00:00 2001
From: Pacien TRAN-GIRARD
Date: Thu, 12 May 2016 15:43:28 +0200
Subject: Properly handle observer mode

---
 src/ch/epfl/xblast/PlayerID.java               |  2 --
 src/ch/epfl/xblast/client/Client.java          | 30 +++++++++++++++++++++-----
 src/ch/epfl/xblast/client/XBlastComponent.java |  3 +++
 src/ch/epfl/xblast/server/Server.java          |  5 +++--
 4 files changed, 31 insertions(+), 9 deletions(-)

(limited to 'src/ch/epfl')

diff --git a/src/ch/epfl/xblast/PlayerID.java b/src/ch/epfl/xblast/PlayerID.java
index 96b98e4..72a48b9 100644
--- a/src/ch/epfl/xblast/PlayerID.java
+++ b/src/ch/epfl/xblast/PlayerID.java
@@ -13,8 +13,6 @@ public enum PlayerID {
     PLAYER_3,
     PLAYER_4;
 
-    public static final byte OBSERVER = -1;
-
     public Cell initialPosition() {
         switch (this) {
             case PLAYER_1:
diff --git a/src/ch/epfl/xblast/client/Client.java b/src/ch/epfl/xblast/client/Client.java
index 5b331f2..b522312 100644
--- a/src/ch/epfl/xblast/client/Client.java
+++ b/src/ch/epfl/xblast/client/Client.java
@@ -15,10 +15,8 @@ import java.net.SocketAddress;
 import java.net.StandardProtocolFamily;
 import java.nio.ByteBuffer;
 import java.nio.channels.DatagramChannel;
-import java.util.ArrayList;
-import java.util.Collections;
+import java.util.*;
 import java.util.List;
-import java.util.Optional;
 import java.util.function.Consumer;
 
 /**
@@ -154,6 +152,25 @@ public class Client {
 
     }
 
+    private static PlayerID deserializePlayerID(byte b) {
+        if (b == Server.OBSERVER)
+            return null;
+
+        try {
+            return PlayerID.fromByte(b);
+        } catch (IllegalArgumentException e) {
+            return null;
+        }
+    }
+
+    private static GameState deserializeGameState(List<Byte> b) {
+        try {
+            return GameStateDeserializer.deserialize(b);
+        } catch (IllegalArgumentException e) {
+            return null;
+        }
+    }
+
     private final Channel channel;
     private final GUI gui;
 
@@ -193,8 +210,11 @@ public class Client {
     private void updateGameState() {
         List<Byte> serializedGameState = this.channel.receiveGameState(true);
         if (serializedGameState.size() < 1) return;
-        PlayerID player = PlayerID.fromByte(serializedGameState.get(0));
-        GameState gameState = GameStateDeserializer.deserialize(Lists.firstDropped(serializedGameState, 1));
+
+        PlayerID player = deserializePlayerID(serializedGameState.get(0));
+        GameState gameState = deserializeGameState(Lists.firstDropped(serializedGameState, 1));
+        if (Objects.isNull(gameState)) return;
+
         this.gui.setGameState(gameState, player);
     }
 
diff --git a/src/ch/epfl/xblast/client/XBlastComponent.java b/src/ch/epfl/xblast/client/XBlastComponent.java
index 0ef8c5c..dfc0be5 100644
--- a/src/ch/epfl/xblast/client/XBlastComponent.java
+++ b/src/ch/epfl/xblast/client/XBlastComponent.java
@@ -121,6 +121,9 @@ public final class XBlastComponent extends JComponent {
     }
 
     private static List<GameState.Player> sortPlayers(List<GameState.Player> players, PlayerID currentPlayerID) {
+        if (Objects.isNull(currentPlayerID))
+            return players;
+
         return Lists.sorted(
                 players,
                 GameState.Player
diff --git a/src/ch/epfl/xblast/server/Server.java b/src/ch/epfl/xblast/server/Server.java
index 1f29607..8a4b09b 100644
--- a/src/ch/epfl/xblast/server/Server.java
+++ b/src/ch/epfl/xblast/server/Server.java
@@ -22,9 +22,10 @@ import java.util.*;
 public class Server {
 
     public static final int DEFAULT_PORT = 2016;
-
     private static final long REFRESH_RATE = (long) (50 * 1E6); // nanosecond
+
     private static final int DEFAULT_EXPECTED_CLIENTS = PlayerID.values().length;
+    public static final byte OBSERVER = -1;
 
     private static class Channel {
 
@@ -198,7 +199,7 @@ public class Server {
         List<Byte> serialized = GameStateSerializer.serialize(BoardPainter.DEFAULT_BOARD_PAINTER, gs);
 
         for (Map.Entry<SocketAddress, PlayerID> client : this.registeredClientsMap.entrySet()) {
-            byte activePlayer = Objects.nonNull(client) ? client.getValue().toByte() : PlayerID.OBSERVER;
+            byte activePlayer = Objects.nonNull(client) ? client.getValue().toByte() : OBSERVER;
             this.channel.send(Lists.prepended(serialized, activePlayer), client.getKey());
         }
     }
-- 
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