Scissors/patches/server/0008-Reject-oversized-components-from-updating.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Telesphoreo <me@telesphoreo.me>
Date: Wed, 8 May 2024 12:08:31 -0500
Subject: [PATCH] Reject oversized components from updating


diff --git a/src/main/java/net/minecraft/network/chat/ComponentUtils.java b/src/main/java/net/minecraft/network/chat/ComponentUtils.java
index 3365aed2b67ae0e4dd0410f5190ba474f146139b..5dea669ed5da073dcdfe4cbbf5521a622242563b 100644
--- a/src/main/java/net/minecraft/network/chat/ComponentUtils.java
+++ b/src/main/java/net/minecraft/network/chat/ComponentUtils.java
@@ -1,6 +1,7 @@
 package net.minecraft.network.chat;
 
 import com.google.common.collect.Lists;
+import com.google.gson.JsonParser;
 import com.mojang.brigadier.Message;
 import com.mojang.brigadier.exceptions.CommandSyntaxException;
 import com.mojang.datafixers.DataFixUtils;
@@ -38,8 +39,9 @@ public class ComponentUtils {
     }
 
     public static MutableComponent updateForEntity(@Nullable CommandSourceStack source, Component text, @Nullable Entity sender, int depth) throws CommandSyntaxException {
+        MutableComponent result; // Scissors
         if (depth > 100) {
-            return text.copy();
+            result = text.copy(); // Scissors
         } else {
             // Paper start - adventure; pass actual vanilla component
             if (text instanceof io.papermc.paper.adventure.AdventureComponent adventureComponent) {
@@ -52,8 +54,9 @@ public class ComponentUtils {
                 mutableComponent.append(updateForEntity(source, component, sender, depth + 1));
             }
 
-            return mutableComponent.withStyle(resolveStyle(source, text.getStyle(), sender, depth));
+            result = mutableComponent.withStyle(resolveStyle(source, text.getStyle(), sender, depth));
         }
+        return JsonParser.parseString(result.toString()).toString().length() > 65535 ? Component.empty() : result; // Scissors
     }
 
     private static Style resolveStyle(@Nullable CommandSourceStack source, Style style, @Nullable Entity sender, int depth) throws CommandSyntaxException {