房间创建和进入相关逻辑和协议

Hotfix/Map/Helper/RoomHelper.cs

@@ -0,0 +1,69 @@
+using System.Text;
+
+namespace NB.Map;
+
+public static class RoomHelper
+{
+    #region 房间id
+
+    private const string Base36Chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+    private const int RoomSeqBits = 16; // 每个服务最多 65535 个房间
+
+    /// <summary>
+    /// 生成房间码（固定5位）
+    /// </summary>
+    /// <param name="serviceId"></param>
+    /// <param name="roomSeq"></param>
+    /// <returns></returns>
+    public static string GenerateCode(uint serviceId, int roomSeq)
+    {
+        long packed = ((long)serviceId << RoomSeqBits) | (uint)roomSeq;
+        string code = EncodeBase36(packed);
+
+        // 固定5位，不够左侧补0
+        return code.PadLeft(5, '0');
+    }
+
+    /// <summary>
+    /// 解析房间码
+    /// </summary>
+    /// <param name="code"></param>
+    /// <param name="serviceId"></param>
+    /// <param name="roomSeq"></param>
+    public static void ParseCode(string code, out uint serviceId, out int roomSeq)
+    {
+        long packed = DecodeBase36(code);
+        roomSeq = (int)(packed & ((1 << RoomSeqBits) - 1));
+        serviceId = (uint)(packed >> RoomSeqBits);
+    }
+
+    private static string EncodeBase36(long value)
+    {
+        if (value == 0) return "0";
+        StringBuilder sb = new StringBuilder();
+        while (value > 0)
+        {
+            int remainder = (int)(value % 36);
+            sb.Insert(0, Base36Chars[remainder]);
+            value /= 36;
+        }
+
+        return sb.ToString();
+    }
+
+    private static long DecodeBase36(string str)
+    {
+        long result = 0;
+        foreach (char c in str)
+        {
+            int val = Base36Chars.IndexOf(c);
+            if (val < 0) throw new ArgumentException("Invalid Base36 character: " + c);
+            result = result * 36 + val;
+        }
+
+        return result;
+    }
+
+    #endregion
+    
+}