add Level Restriction

src/Modules/AntiCheat/RPCHandlers/SetLevelHandler.cs

@@ -12,6 +12,16 @@ internal sealed class SetLevelHandler : RPCHandler
 {
     internal override byte CallId => (byte)RpcCalls.SetLevel;
 
+    internal override void Handle(PlayerControl? sender, MessageReader reader)
+    {
+        uint level = reader.ReadPackedUInt32() + 1;
+
+        if (level < BetterGameSettings.KickLevelBelow.GetInt())
+        {
+            sender.Kick(setReasonInfo: $" is level {level}, level must be equal or above {BetterGameSettings.KickLevelBelow.GetInt()} to join");
+        }
+    }
+
     internal override bool HandleAntiCheatCancel(PlayerControl? sender, MessageReader reader)
     {
         if (sender.DataIsCollected() == true && sender.BetterData().AntiCheatInfo.HasSetLevel && !GameState.IsLocalGame && GameState.IsVanillaServer)
@@ -31,9 +41,9 @@ internal sealed class SetLevelHandler : RPCHandler
 
     internal override void HandleAntiCheat(PlayerControl? sender, MessageReader reader)
     {
-        uint level = reader.ReadPackedUInt32();
+        uint level = reader.ReadPackedUInt32() + 1;
 
-        if (level + 1 > BetterGameSettings.DetectedLevelAbove.GetInt())
+        if (level > BetterGameSettings.DetectedLevelAbove.GetInt())
         {
             if (BetterNotificationManager.NotifyCheat(sender, string.Format(Translator.GetString("AntiCheat.InvalidLevelRPC"), level)))
             {

src/Patches/Gameplay/UI/Settings/GameSettingsPatch.cs

@@ -19,6 +19,7 @@ class BetterGameSettings
     internal static OptionCheckboxItem? UseBanWordListOnlyLobby;
     internal static OptionIntItem? HideAndSeekImpNum;
     internal static OptionIntItem? DetectedLevelAbove;
+    internal static OptionIntItem? KickLevelBelow;
     internal static OptionCheckboxItem? DetectCheatClients;
     internal static OptionCheckboxItem? DetectInvalidRPCs;
     internal static OptionStringItem? RoleRandomizer;
@@ -44,7 +45,7 @@ internal static class GameSettingsPatch
 
     internal static void SetupSettings(bool IsPreload = false)
     {
-        // Use 1700 next ID
+        // Use 1800 next ID
 
         BetterSettingsTab = OptionTab.Create(3, "BetterSetting", "BetterSetting.Description", Color.green);
 
@@ -71,6 +72,7 @@ internal static class GameSettingsPatch
             OptionTitleItem.Create(BetterSettingsTab, "BetterSetting.TextHeader.Detections");
             BetterGameSettings.CensorDetectionReason = OptionCheckboxItem.Create(1300, BetterSettingsTab, "BetterSetting.Setting.CensorDetectionReason", false);
             BetterGameSettings.DetectedLevelAbove = OptionIntItem.Create(600, BetterSettingsTab, "BetterSetting.Setting.DetectedLevelAbove", (100, 10000, 5), 500, ("Lv ", ""));
+            BetterGameSettings.KickLevelBelow = OptionIntItem.Create(1700, BetterSettingsTab, "BetterSetting.Setting.KickLevelBelow", (0, 10000, 1), 0, ("Lv ", ""));
             BetterGameSettings.DetectCheatClients = OptionCheckboxItem.Create(700, BetterSettingsTab, "BetterSetting.Setting.DetectCheatClients", true);
             BetterGameSettings.DetectInvalidRPCs = OptionCheckboxItem.Create(800, BetterSettingsTab, "BetterSetting.Setting.DetectInvalidRPCs", true);
         }

src/Resources/Lang/en_US.json

@@ -87,6 +87,7 @@
   "BetterSetting.Setting.ShowRoleForClients": "Show role in name for clients",
   "BetterSetting.Setting.CensorDetectionReason": "Censor detection reason",
   "BetterSetting.Setting.DetectedLevelAbove": "Detected player levels >",
+  "BetterSetting.Setting.KickLevelBelow": "Kick player levels <",
   "BetterSetting.Setting.DetectCheatClients": "Detect cheat clients",
   "BetterSetting.Setting.DetectInvalidRPCs": "Detect invalid RPCs",
   "BetterSetting.Setting.RoleRandomizer": "Randomizer",