support for rain, PacketChangeGameState, gamemode change support

src/main/java/de/bixilon/minosoft/game/datatypes/World.java

@@ -12,6 +12,7 @@ public class World {
     public final HashMap<ChunkLocation, Chunk> chunks;
     final String name;
     boolean hardcore;
+    boolean raining;
 
     public World(String name) {
         this.name = name;
@@ -65,4 +66,12 @@ public class World {
     public void setHardcore(boolean hardcore) {
         this.hardcore = hardcore;
     }
+
+    public boolean isRaining() {
+        return raining;
+    }
+
+    public void setRaining(boolean raining) {
+        this.raining = raining;
+    }
 }

src/main/java/de/bixilon/minosoft/protocol/packets/clientbound/play/PacketChangeGameState.java

@@ -0,0 +1,90 @@
+package de.bixilon.minosoft.protocol.packets.clientbound.play;
+
+import de.bixilon.minosoft.game.datatypes.GameMode;
+import de.bixilon.minosoft.logging.Log;
+import de.bixilon.minosoft.protocol.packets.ClientboundPacket;
+import de.bixilon.minosoft.protocol.protocol.InPacketBuffer;
+import de.bixilon.minosoft.protocol.protocol.PacketHandler;
+import de.bixilon.minosoft.protocol.protocol.ProtocolVersion;
+
+public class PacketChangeGameState implements ClientboundPacket {
+    Reason reason;
+    float value;
+
+    @Override
+    public void read(InPacketBuffer buffer, ProtocolVersion v) {
+        switch (v) {
+            case VERSION_1_7_10:
+                reason = Reason.byId(buffer.readByte());
+                value = buffer.readFloat();
+                break;
+        }
+        log();
+    }
+
+    @Override
+    public void log() {
+        switch (getReason()) {
+            case START_RAIN:
+                Log.game("Received weather packet: Starting rain...");
+                break;
+            case END_RAIN:
+                Log.game("Received weather packet: Stopping rain...");
+                break;
+            case CHANGE_GAMEMODE:
+                Log.game(String.format("Received game mode change: Now in %s", GameMode.byId(getValue().intValue()).name()));
+                break;
+            default:
+                Log.protocol(String.format("Received game status change (%s)", getReason().name()));
+                break;
+        }
+    }
+
+    @Override
+    public void handle(PacketHandler h) {
+        h.handle(this);
+    }
+
+    public Reason getReason() {
+        return reason;
+    }
+
+    public Float getValue() {
+        return value;
+    }
+
+    public enum Reason {
+        INVALID_BED(0),
+        END_RAIN(1),
+        START_RAIN(2),
+        CHANGE_GAMEMODE(3),
+        ENTER_CREDITS(4),
+        DEMO_MESSAGES(5),
+        ARROW_HITTING_PLAYER(6),
+        FADE_VALUE(7),
+        FADE_TIME(8);
+
+        byte id;
+
+        Reason(byte id) {
+            this.id = id;
+        }
+
+        Reason(int id) {
+            this.id = (byte) id;
+        }
+
+        public static Reason byId(byte id) {
+            for (Reason g : values()) {
+                if (g.getId() == id) {
+                    return g;
+                }
+            }
+            return null;
+        }
+
+        public int getId() {
+            return id;
+        }
+    }
+}

src/main/java/de/bixilon/minosoft/protocol/protocol/PacketHandler.java

@@ -2,6 +2,7 @@ package de.bixilon.minosoft.protocol.protocol;
 
 import de.bixilon.minosoft.Minosoft;
 import de.bixilon.minosoft.config.GameConfiguration;
+import de.bixilon.minosoft.game.datatypes.GameMode;
 import de.bixilon.minosoft.logging.Log;
 import de.bixilon.minosoft.protocol.network.Connection;
 import de.bixilon.minosoft.protocol.packets.clientbound.login.PacketEncryptionKeyRequest;
@@ -113,4 +114,19 @@ public class PacketHandler {
         connection.getPlayer().setLevel(pkg.getLevel());
         connection.getPlayer().setTotalExperience(pkg.getTotal());
     }
+
+    public void handle(PacketChangeGameState pkg) {
+        switch (pkg.getReason()) {
+            case START_RAIN:
+                connection.getPlayer().getWorld().setRaining(true);
+                break;
+            case END_RAIN:
+                connection.getPlayer().getWorld().setRaining(false);
+                break;
+            case CHANGE_GAMEMODE:
+                connection.getPlayer().setGameMode(GameMode.byId(pkg.getValue().intValue()));
+                break;
+            //ToDo: handle all updates
+        }
+    }
 }

src/main/java/de/bixilon/minosoft/protocol/protocol/Protocol.java

@@ -48,5 +48,6 @@ public interface Protocol {
         packetClassMapping.put(Packets.Clientbound.PLAY_DISCONNECT, PacketDisconnect.class);
         packetClassMapping.put(Packets.Clientbound.PLAY_HELD_ITEM_CHANGE, PacketHeldItemChangeReceiving.class);
         packetClassMapping.put(Packets.Clientbound.PLAY_SET_EXPERIENCE, PacketSetExperience.class);
+        packetClassMapping.put(Packets.Clientbound.PLAY_CHANGE_GAME_STATE, PacketChangeGameState.class);
     }
 }