Paper/patches/server/0400-Update-itemstack-legacy-name-and-lore.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <Blake.Galbreath@GMail.com>
Date: Wed, 1 Jul 2020 11:57:40 -0500
Subject: [PATCH] Update itemstack legacy name and lore


diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
index 0a3fec9b82a4d744f9046aebe30f80bb6e56c500..4a6e128c62c890c34b62f826d586ae6a424e7f01 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -196,6 +196,44 @@ public final class ItemStack {
             list.sort((java.util.Comparator<? super net.minecraft.nbt.Tag>) enchantSorter); // Paper
         } catch (Exception ignored) {}
     }
+
+    private void processText() {
+        CompoundTag display = getTagElement("display");
+        if (display != null) {
+            if (display.contains("Name", net.minecraft.nbt.Tag.TAG_STRING)) {
+                String json = display.getString("Name");
+                if (json != null && json.contains("\u00A7")) {
+                    try {
+                        display.put("Name", convert(json));
+                    } catch (com.google.gson.JsonParseException jsonparseexception) {
+                        display.remove("Name");
+                    }
+                }
+            }
+            if (display.contains("Lore", net.minecraft.nbt.Tag.TAG_LIST)) {
+                ListTag list = display.getList("Lore", net.minecraft.nbt.Tag.TAG_STRING);
+                for (int index = 0; index < list.size(); index++) {
+                    String json = list.getString(index);
+                    if (json != null && json.contains("\u00A7")) { // Only try if it has legacy in the unparsed json
+                        try {
+                            list.set(index, convert(json));
+                        } catch (com.google.gson.JsonParseException e) {
+                            list.set(index, net.minecraft.nbt.StringTag.valueOf(org.bukkit.craftbukkit.util.CraftChatMessage.toJSON(net.minecraft.network.chat.Component.literal(""))));
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private net.minecraft.nbt.StringTag convert(String json) {
+        Component component = Component.Serializer.fromJson(json);
+        if (component.getContents() instanceof final net.minecraft.network.chat.contents.PlainTextContents plainTextContents && plainTextContents.text().contains("\u00A7") && component.getSiblings().isEmpty()) {
+            // Only convert if the root component is a single comp with legacy in it, don't convert already normal components
+            component = org.bukkit.craftbukkit.util.CraftChatMessage.fromString(plainTextContents.text())[0];
+        }
+        return net.minecraft.nbt.StringTag.valueOf(org.bukkit.craftbukkit.util.CraftChatMessage.toJSON(component));
+    }
     // Paper end
 
     public ItemStack(ItemLike item) {
@@ -245,6 +283,7 @@ public final class ItemStack {
         if (nbttagcompound.contains("tag", 10)) {
             this.tag = nbttagcompound.getCompound("tag").copy();
             this.processEnchantOrder(this.tag); // Paper
+            this.processText(); // Paper - Update itemstack legacy name and lore
             this.getItem().verifyTagAfterLoad(this.tag);
         }