From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MrHua269 <novau233@163.com>
Date: Wed, 7 Feb 2024 04:50:10 +0000
Subject: [PATCH] Add config for username check


diff --git a/src/main/java/me/earthme/luminol/config/modules/misc/UsernameCheckConfig.java b/src/main/java/me/earthme/luminol/config/modules/misc/UsernameCheckConfig.java
new file mode 100644
index 0000000000000000000000000000000000000000..c7e4724cc4ab8d911bcaf0106c098b266c843bb1
--- /dev/null
+++ b/src/main/java/me/earthme/luminol/config/modules/misc/UsernameCheckConfig.java
@@ -0,0 +1,20 @@
+package me.earthme.luminol.config.modules.misc;
+
+import me.earthme.luminol.config.ConfigInfo;
+import me.earthme.luminol.config.EnumConfigCategory;
+import me.earthme.luminol.config.IConfigModule;
+
+public class UsernameCheckConfig implements IConfigModule {
+    @ConfigInfo(baseName = "enabled")
+    public static boolean enabled = true;
+
+    @Override
+    public EnumConfigCategory getCategory() {
+        return EnumConfigCategory.MISC;
+    }
+
+    @Override
+    public String getBaseName() {
+        return "username_checks";
+    }
+}
diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index 227d62a69a453d49c28568ecb41ecef85a35405b..8951397adcc5505304d0dece6435aab786017399 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -178,7 +178,8 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
     public void handleHello(ServerboundHelloPacket packet) {
         Validate.validState(this.state == ServerLoginPacketListenerImpl.State.HELLO, "Unexpected hello packet", new Object[0]);
         // Paper start - Validate usernames
-        if (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.isProxyOnlineMode()
+        if (me.earthme.luminol.config.modules.misc.UsernameCheckConfig.enabled // Luminol - Add config for username check
+            && io.papermc.paper.configuration.GlobalConfiguration.get().proxies.isProxyOnlineMode()
             && io.papermc.paper.configuration.GlobalConfiguration.get().unsupportedSettings.performUsernameValidation
             && !this.iKnowThisMayNotBeTheBestIdeaButPleaseDisableUsernameValidation) {
             Validate.validState(StringUtil.isReasonablePlayerName(packet.name()), "Invalid characters in username", new Object[0]);
diff --git a/src/main/java/net/minecraft/server/players/GameProfileCache.java b/src/main/java/net/minecraft/server/players/GameProfileCache.java
index 34b4166adfae8ff7d1eb73d56a72931b005330a7..fc95632268caa8941dcce7a575ce00303864c4c1 100644
--- a/src/main/java/net/minecraft/server/players/GameProfileCache.java
+++ b/src/main/java/net/minecraft/server/players/GameProfileCache.java
@@ -82,7 +82,7 @@ public class GameProfileCache {
     }
 
     private static Optional<GameProfile> lookupGameProfile(GameProfileRepository repository, String name) {
-        if (!StringUtil.isValidPlayerName(name)) {
+        if (!StringUtil.isValidPlayerName(name, false)) { // Luminol - Add config for username check - Directly return, skip unnecessary following logic
             return GameProfileCache.createUnknownProfile(name);
         } else {
             final AtomicReference<GameProfile> atomicreference = new AtomicReference();
diff --git a/src/main/java/net/minecraft/util/StringUtil.java b/src/main/java/net/minecraft/util/StringUtil.java
index 6c33002dc8bbb3759c3156302ab7d1f26ce5e8ee..8caf8dd187dfdc67a8b97db080a9fe0ef5234943 100644
--- a/src/main/java/net/minecraft/util/StringUtil.java
+++ b/src/main/java/net/minecraft/util/StringUtil.java
@@ -64,6 +64,13 @@ public class StringUtil {
     }
 
     public static boolean isValidPlayerName(String name) {
+        // Luminol start - Add config for username check
+        return isValidPlayerName(name, !me.earthme.luminol.config.modules.misc.UsernameCheckConfig.enabled);
+    }
+
+    public static boolean isValidPlayerName(String name, boolean bypassCheck) {
+        if (bypassCheck) return name.length() <= 16;
+        // Luminol end - Add config for username check
         return name.length() <= 16 && name.chars().filter(c -> c <= 32 || c >= 127).findAny().isEmpty();
     }