Use zero-width codec for online appearance sync

avoid disturbing other clients

Assets/Scripts/MDPro3/Duel/OnlineAppearanceSync.cs

+using MDPro3.Duel.YGOSharp;
 using System;
 using System.Collections.Generic;
-using MDPro3.Duel.YGOSharp;
+using System.Linq;
+using System.Text;
 
 namespace MDPro3
 {
@@ -18,9 +20,6 @@ namespace MDPro3
 
     public static class OnlineAppearanceSync
     {
-        public const string Prefix = "mdp3acc:v2:";
-        public const string LegacyPrefix = "/mdp3acc:v1:";
-
         private const int DefaultCase = 1080001;
         private const int DefaultProtector = 1070001;
         private const int DefaultField = 1090001;
@@ -38,7 +37,9 @@ namespace MDPro3
         public static string BuildMessage(Deck deck)
         {
             var data = BuildValidatedData(deck);
-            return $"{Prefix}{data.Case},{data.Protector},{data.Field},{data.Grave},{data.Stand},{data.Mate},{data.Face},{data.Frame}";
+            var ints = new int[]
+            { data.Case, data.Protector, data.Field, data.Grave, data.Stand, data.Mate, data.Face, data.Frame };
+            return ZeroWidthIntsCodec.Encode(ints);
         }
 
         public static string BuildMessageForLocalPlayer(Deck deck)
@@ -53,68 +54,25 @@ namespace MDPro3
             if (!TryExtractPayload(content, out var payload))
                 return false;
 
-            var parts = payload.Split(',');
-            if (parts.Length != 6 && parts.Length != 8)
-                return false;
-
-            if (!int.TryParse(parts[0], out var deckCase))
-                return false;
-            if (!int.TryParse(parts[1], out var protector))
-                return false;
-            if (!int.TryParse(parts[2], out var field))
-                return false;
-            if (!int.TryParse(parts[3], out var grave))
-                return false;
-            if (!int.TryParse(parts[4], out var stand))
-                return false;
-            if (!int.TryParse(parts[5], out var mate))
-                return false;
-
-            var defaultFace = GetDefaultCode(Items.ItemType.Face, DefaultFace);
-            var defaultFrame = GetDefaultCode(Items.ItemType.Frame, DefaultFrame);
-            var face = defaultFace;
-            var frame = defaultFrame;
-            if (parts.Length >= 8)
-            {
-                if (!int.TryParse(parts[6], out face))
-                    return false;
-                if (!int.TryParse(parts[7], out frame))
-                    return false;
-            }
-
             data = new OnlineAppearanceData
             {
-                Case = EnsureValidCode(deckCase, Items.ItemType.Case, DefaultCase),
-                Protector = EnsureValidCode(protector, Items.ItemType.Protector, DefaultProtector),
-                Field = EnsureValidCode(field, Items.ItemType.Mat, DefaultField),
-                Grave = EnsureValidCode(grave, Items.ItemType.Grave, DefaultGrave),
-                Stand = EnsureValidCode(stand, Items.ItemType.Stand, DefaultStand),
-                Mate = EnsureValidCode(mate, Items.ItemType.Mate, DefaultMate),
-                Face = EnsureValidCode(face, Items.ItemType.Face, defaultFace),
-                Frame = EnsureValidCode(frame, Items.ItemType.Frame, defaultFrame),
+                Case = EnsureValidCode(payload[0], Items.ItemType.Case, DefaultCase),
+                Protector = EnsureValidCode(payload[1], Items.ItemType.Protector, DefaultProtector),
+                Field = EnsureValidCode(payload[2], Items.ItemType.Mat, DefaultField),
+                Grave = EnsureValidCode(payload[3], Items.ItemType.Grave, DefaultGrave),
+                Stand = EnsureValidCode(payload[4], Items.ItemType.Stand, DefaultStand),
+                Mate = EnsureValidCode(payload[5], Items.ItemType.Mate, DefaultMate),
+                Face = EnsureValidCode(payload[6], Items.ItemType.Face, DefaultFace),
+                Frame = EnsureValidCode(payload[7], Items.ItemType.Frame, DefaultFrame),
             };
             return true;
         }
 
-        private static bool TryExtractPayload(string content, out string payload)
+        private static bool TryExtractPayload(string content, out int[] payload)
         {
-            payload = null;
-            if (string.IsNullOrEmpty(content))
-                return false;
-
-            if (content.StartsWith(Prefix, StringComparison.Ordinal))
-            {
-                payload = content.Substring(Prefix.Length).Trim().TrimEnd('\0');
-                return true;
-            }
-
-            if (content.StartsWith(LegacyPrefix, StringComparison.Ordinal))
-            {
-                payload = content.Substring(LegacyPrefix.Length).Trim().TrimEnd('\0');
-                return true;
-            }
-
-            return false;
+            payload = ZeroWidthIntsCodec.Decode(content);
+            if (payload == null) return false;
+            return true;
         }
 
         public static bool IsValid(OnlineAppearanceData data)
@@ -255,11 +213,116 @@ namespace MDPro3
             if (list == null)
                 return false;
 
-            for (var i = 0; i < list.Count; i++)
-                if (list[i].id == id)
-                    return true;
+            return list.Any(item => item.id == id);
+        }
+    }
+
+    public static class ZeroWidthIntsCodec
+    {
+        // 定义4个零宽字符表示2比特
+        private const char ZW_00 = '\u200B'; // 零宽空格 -> 00
+        private const char ZW_01 = '\u200C'; // 零宽非连接符 -> 01
+        private const char ZW_10 = '\u200D'; // 零宽连接符 -> 10
+        private const char ZW_11 = '\u200E'; // 从左到右标记 -> 11
+
+        // 起始标记：两个连续ZW_10 (U+200D U+200D)
+        private const string START_MARKER = "\u200D\u200D";
+
+        // 映射表：2比特值 -> 字符
+        private static readonly char[] Bit2Char = new char[4] { ZW_00, ZW_01, ZW_10, ZW_11 };
+        // 反向映射：字符 -> 2比特值
+        private static readonly Dictionary<char, byte> Char2Bit = new()
+        {{ ZW_00, 0 }, { ZW_01, 1 }, { ZW_10, 2 }, { ZW_11, 3 }};
+
+        public static string Encode(int[] ints)
+        {
+            if (ints == null || ints.Length != 8)
+                throw new ArgumentException("需要长度为8的int数组");
+
+            // 1. 将8个int转换为字节数组（小端序）
+            byte[] bytes = new byte[32];
+            for (int i = 0; i < 8; i++)
+            {
+                byte[] intBytes = BitConverter.GetBytes(ints[i]);
+                if (!BitConverter.IsLittleEndian)
+                    Array.Reverse(intBytes);
+                Array.Copy(intBytes, 0, bytes, i * 4, 4);
+            }
+
+            // 2. 将字节数组转换为比特流（使用BitArray，索引0为最低位）
+            System.Collections.BitArray bits = new(bytes);
 
-            return false;
+            // 3. 每次取2比特，映射为字符
+            StringBuilder sb = new();
+            sb.Append(START_MARKER);
+            for (int i = 0; i < bits.Length; i += 2)
+            {
+                // 构建2比特值 (低位在前，即bit i为低位，bit i+1为高位)
+                int value = (bits[i] ? 1 : 0) | ((bits[i + 1] ? 1 : 0) << 1);
+                sb.Append(Bit2Char[value]);
+            }
+
+            return sb.ToString();
+        }
+
+        public static int[] Decode(string hiddenMessage)
+        {
+            if (string.IsNullOrEmpty(hiddenMessage))
+                return null;
+
+            // 查找起始标记
+            int markerIndex = hiddenMessage.IndexOf(START_MARKER, StringComparison.Ordinal);
+            if (markerIndex == -1)
+                return null;
+
+            string dataPart = hiddenMessage[(markerIndex + START_MARKER.Length)..];
+
+            // 收集比特
+            List<bool> bits = new();
+            foreach (char c in dataPart)
+            {
+                if (!Char2Bit.TryGetValue(c, out byte twoBits))
+                {
+                    // 由于我们预期只有映射字符，所以如果出现未知字符，可视为无效消息。
+                    return null;
+                }
+                // 将2比特拆分为两个布尔值，注意低位先存
+                bits.Add((twoBits & 1) != 0);      // 低位
+                bits.Add((twoBits & 2) != 0);      // 高位
+            }
+
+            // 校验比特数：应为256
+            if (bits.Count != 256)
+            {
+                // 可能数据损坏
+                return null;
+            }
+
+            // 将比特数组转回字节数组
+            byte[] bytes = new byte[32];
+            for (int i = 0; i < bits.Count; i++)
+            {
+                if (bits[i])
+                {
+                    int byteIndex = i / 8;
+                    int bitIndex = i % 8;
+                    bytes[byteIndex] |= (byte)(1 << bitIndex);
+                }
+            }
+
+            // 解析8个int
+            int[] result = new int[8];
+            for (int i = 0; i < 8; i++)
+            {
+                byte[] intBytes = new byte[4];
+                Array.Copy(bytes, i * 4, intBytes, 0, 4);
+                if (!BitConverter.IsLittleEndian)
+                    Array.Reverse(intBytes);
+                result[i] = BitConverter.ToInt32(intBytes, 0);
+            }
+
+            return result;
         }
     }
+
 }

Assets/Scripts/MDPro3/Duel/TcpHelper.cs

@@ -471,7 +471,6 @@ namespace MDPro3
                 return;
             var syncMessage = OnlineAppearanceSync.BuildMessageForLocalPlayer(deckFor);
             CtosMessage_Chat(syncMessage);
-            Debug.Log($"[OnlineAppearance] Sent sync payload: {syncMessage}");
         }
 
         public static void CtosMessage_UpdateAppearanceFromCurrentDeck()

Assets/Scripts/MDPro3/Servant/RoomServant.cs

@@ -547,7 +547,7 @@ namespace MDPro3.Servant
         {
             int player = r.ReadInt16();
             var length = (int)((r.BaseStream.Length - r.BaseStream.Position) / 2);
-            var content = r.ReadUnicode((int)length);
+            var content = r.ReadUnicode(length);
             if (OnlineAppearanceSync.IsSyncMessage(content))
             {
                 if (player >= 0 && player < 4 && OnlineAppearanceSync.TryParse(content, out var appearance))
@@ -559,7 +559,7 @@ namespace MDPro3.Servant
                 }
                 else
                 {
-                    Debug.LogWarning($"[OnlineAppearance] Ignored sync chat. seat={player}, content='{content}'");
+                    Debug.LogWarning($"[OnlineAppearance] Ignored sync chat. seat={player}");
                 }
                 return;
             }