Leaf/patches/server/0016-Remove-vanilla-username-check.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Dreeam <61569423+Dreeam-qwq@users.noreply.github.com>
Date: Wed, 12 Oct 2022 14:36:58 -0400
Subject: [PATCH] Remove vanilla username check


diff --git a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
index d5acf191e3f34c84b3711c0ba77e7cb001aee507..0afd30a9a4eb7de7e58e1b91342cca51c771f300 100644
--- a/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerLoginPacketListenerImpl.java
@@ -186,7 +186,8 @@ public class ServerLoginPacketListenerImpl implements ServerLoginPacketListener,
         // Gale start - JettPack - reduce array allocations
         Validate.validState(this.state == ServerLoginPacketListenerImpl.State.HELLO, "Unexpected hello packet", me.titaniumtown.ArrayConstants.emptyObjectArray);
         // Paper start - Validate usernames
-        if (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.isProxyOnlineMode()
+        if (!org.dreeam.leaf.config.modules.misc.RemoveVanillaUsernameCheck.enabled // Leaf - Remove Vanilla 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", me.titaniumtown.ArrayConstants.emptyObjectArray);
diff --git a/src/main/java/net/minecraft/server/players/GameProfileCache.java b/src/main/java/net/minecraft/server/players/GameProfileCache.java
index 34b4166adfae8ff7d1eb73d56a72931b005330a7..18ecb876bb65d2cf5d8fc999a22712f5731d8fcc 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)) { // Leaf start - Remove Vanilla 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 c89fc375aff548a2b03eaf4da3b6a075012df012..68e621ef12d9da67f04086d42360cb08b169aba4 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) {
+        // Leaf start - Remove Vanilla username check
+        return isValidPlayerName(name, org.dreeam.leaf.config.modules.misc.RemoveVanillaUsernameCheck.enabled);
+    }
+
+    public static boolean isValidPlayerName(String name, boolean bypassCheck) {
+        if (bypassCheck) return name.length() <= 16;
+        // Leaf end- Remove Vanilla username check
         return name.length() <= 16 && name.chars().filter(c -> c <= 32 || c >= 127).findAny().isEmpty();
     }
 
diff --git a/src/main/java/org/dreeam/leaf/config/modules/misc/RemoveVanillaUsernameCheck.java b/src/main/java/org/dreeam/leaf/config/modules/misc/RemoveVanillaUsernameCheck.java
new file mode 100644
index 0000000000000000000000000000000000000000..f094806fdc4f98924aab69b5dffb3a3ffbc2e21d
--- /dev/null
+++ b/src/main/java/org/dreeam/leaf/config/modules/misc/RemoveVanillaUsernameCheck.java
@@ -0,0 +1,23 @@
+package org.dreeam.leaf.config.modules.misc;
+
+import org.dreeam.leaf.config.ConfigModules;
+import org.dreeam.leaf.config.EnumConfigCategory;
+
+public class RemoveVanillaUsernameCheck extends ConfigModules {
+
+    public String getBasePath() {
+        return EnumConfigCategory.MISC.getBaseKeyName() + ".remove-vanilla-username-check";
+    }
+
+    public static boolean enabled = true;
+
+    @Override
+    public void onLoaded() {
+        enabled = config.getBoolean(getBasePath(), enabled, config.pickStringRegionBased("""
+                Remove Vanilla username check,
+                allowing all characters as username.""",
+                """
+                移除原版的用户名验证,
+                让所有字符均可作为玩家名."""));
+    }
+}