PaperMC/patches/server/0482-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 1f93ad93701339418b554eb3e1e3f74e62468f3f..e643f925623820ffa67217eb3615582c0d0ca3a5 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -168,6 +168,44 @@ public final class ItemStack {
             list.sort((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", 8)) {
+                String json = display.getString("Name");
+                if (json != null && json.contains("\u00A7")) {
+                    try {
+                        display.put("Name", convert(json));
+                    } catch (JsonParseException jsonparseexception) {
+                        display.remove("Name");
+                    }
+                }
+            }
+            if (display.contains("Lore", 9)) {
+                ListTag list = display.getList("Lore", 8);
+                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 (JsonParseException e) {
+                            list.set(index, net.minecraft.nbt.StringTag.valueOf(org.bukkit.craftbukkit.util.CraftChatMessage.toJSON(new TextComponent(""))));
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private net.minecraft.nbt.StringTag convert(String json) {
+        Component component = Component.Serializer.fromJson(json);
+        if (component instanceof TextComponent && component.getContents().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(component.getContents())[0];
+        }
+        return net.minecraft.nbt.StringTag.valueOf(org.bukkit.craftbukkit.util.CraftChatMessage.toJSON(component));
+    }
     // Paper end
 
     public ItemStack(ItemLike item) {
@@ -214,6 +252,7 @@ public final class ItemStack {
             this.tag = (CompoundTag) nbttagcompound.getCompound("tag").copy();
             // CraftBukkit end
             this.processEnchantOrder(this.tag); // Paper
+            this.processText(); // Paper
             this.getItem().verifyTagAfterLoad(this.tag);
         }