Paper/patches/server/0554-Fix-item-default-attributes-API.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sat, 8 May 2021 15:01:54 -0700
Subject: [PATCH] Fix item default attributes API

(previously added this API but upstream also added it)

diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
index 18d46779f56f97aae264325a5202568d8a06a747..abc5f221e90fb39fe2fa192bcbd0a3bb75444d64 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
@@ -395,9 +395,14 @@ public final class CraftMagicNumbers implements UnsafeValues {
 
     @Override
     public Multimap<Attribute, AttributeModifier> getDefaultAttributeModifiers(Material material, EquipmentSlot slot) {
-        ImmutableMultimap.Builder<Attribute, AttributeModifier> defaultAttributes = ImmutableMultimap.builder();
-
-        ItemAttributeModifiers nmsDefaultAttributes = CraftMagicNumbers.getItem(material).getDefaultAttributeModifiers();
+        // Paper start - fix item default attribute API
+        final Item item = CraftMagicNumbers.getItem(material);
+        if (item == null) {
+            throw new IllegalArgumentException(material + " is not an item and therefore does not have attributes");
+        }
+        final ImmutableMultimap.Builder<Attribute, AttributeModifier> defaultAttributes = ImmutableMultimap.builder();
+        ItemAttributeModifiers nmsDefaultAttributes = item.components().getOrDefault(net.minecraft.core.component.DataComponents.ATTRIBUTE_MODIFIERS, ItemAttributeModifiers.EMPTY);
+        // Paper end - fix item default attribute API
         nmsDefaultAttributes.forEach(CraftEquipmentSlot.getNMS(slot), (key, value) -> {
             Attribute attribute = CraftAttribute.minecraftToBukkit(key.value());
             defaultAttributes.put(attribute, CraftAttributeInstance.convert(value, slot));