Initial commit

backend/src/main/java/com/zombie/game/server/RoomManager.java

@@ -0,0 +1,103 @@
+package com.zombie.game.server;
+
+import com.zombie.game.model.PlayerInfo;
+import com.zombie.game.model.Room;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Room manager for tracking game rooms and player-room assignments / 房间管理器，用于追踪游戏房间和玩家房间分配
+ */
+public class RoomManager {
+    // All active rooms mapped by room ID / 所有活跃房间，以房间ID映射
+    private final Map<String, Room> rooms = new ConcurrentHashMap<>();
+    // Player ID to room ID mapping / 玩家ID到房间ID的映射
+    private final Map<String, String> playerToRoom = new ConcurrentHashMap<>();
+
+    // Add a new room to the manager / 向管理器添加新房间
+    public void addRoom(String roomId, Room room) {
+        rooms.put(roomId, room);
+        // Map existing players in room to room ID / 将房间中现有玩家映射到房间ID
+        for (PlayerInfo player : room.getPlayers()) {
+            playerToRoom.put(player.getId(), roomId);
+        }
+    }
+
+    // Add a player to a room / 将玩家添加到房间
+    public boolean joinRoom(String roomId, String playerId, String playerName) {
+        Room room = rooms.get(roomId);
+        if (room == null) return false;
+        // Reject if room is full / 房间已满则拒绝
+        if (room.getPlayerCount() >= 4) return false;
+
+        boolean added = room.addPlayer(playerId, playerName);
+        if (added) {
+            playerToRoom.put(playerId, roomId);
+        }
+        return added;
+    }
+
+    // Remove a player from their room / 从房间中移除玩家
+    public Room leaveRoom(String playerId) {
+        String roomId = playerToRoom.remove(playerId);
+        if (roomId == null) return null;
+
+        Room room = rooms.get(roomId);
+        if (room == null) return null;
+
+        room.removePlayer(playerId);
+        // Delete room if empty / 如果房间为空则删除
+        if (room.getPlayerCount() == 0) {
+            rooms.remove(roomId);
+            return null;
+        }
+        return room;
+    }
+
+    // Get room by player ID / 通过玩家ID获取房间
+    public Room getRoomByPlayerId(String playerId) {
+        String roomId = playerToRoom.get(playerId);
+        if (roomId == null) return null;
+        return rooms.get(roomId);
+    }
+
+    // Get room by room ID / 通过房间ID获取房间
+    public Room getRoom(String roomId) {
+        return rooms.get(roomId);
+    }
+
+    // Get all rooms / 获取所有房间
+    public Collection<Room> getAllRooms() {
+        return rooms.values();
+    }
+
+    // Get rooms that haven't started a game yet / 获取尚未开始游戏的房间
+    public List<Room> getAvailableRooms() {
+        List<Room> available = new ArrayList<>();
+        for (Room room : rooms.values()) {
+            if (!room.isGameStarted()) {
+                available.add(room);
+            }
+        }
+        return available;
+    }
+
+    // Remove a room and all player mappings / 移除房间及其所有玩家映射
+    public void removeRoom(String roomId) {
+        Room room = rooms.remove(roomId);
+        if (room != null) {
+            for (PlayerInfo player : room.getPlayers()) {
+                playerToRoom.remove(player.getId());
+            }
+        }
+    }
+
+    // Check if a player is in any room / 检查玩家是否在任意房间中
+    public boolean isPlayerInRoom(String playerId) {
+        return playerToRoom.containsKey(playerId);
+    }
+}