Grindstone API

Author: BillyGalbreath

patches/api/0031-Grindstone-API.patch

@@ -0,0 +1,72 @@
+package org.purpurmc.purpur.event.inventory;
+
+import org.bukkit.entity.HumanEntity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.inventory.InventoryEvent;
+import org.bukkit.inventory.GrindstoneInventory;
+import org.bukkit.inventory.InventoryView;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
+
+/**
+ * Called when a player takes the result item out of a Grindstone
+ */
+@NullMarked
+public class GrindstoneTakeResultEvent extends InventoryEvent {
+    private static final HandlerList handlers = new HandlerList();
+    private final Player player;
+    private final ItemStack result;
+    private int experienceAmount;
+
+    @ApiStatus.Internal
+    public GrindstoneTakeResultEvent(HumanEntity player, InventoryView view, ItemStack result, int experienceAmount) {
+        super(view);
+        this.player = (Player) player;
+        this.result = result;
+        this.experienceAmount = experienceAmount;
+    }
+
+    public Player getPlayer() {
+        return player;
+    }
+
+    public ItemStack getResult() {
+        return result;
+    }
+
+    @Override
+    public GrindstoneInventory getInventory() {
+        return (GrindstoneInventory) super.getInventory();
+    }
+
+    /**
+     * Get the amount of experience this transaction will give
+     * (takes priority over and uses result from {@link org.bukkit.event.block.BlockExpEvent})
+     *
+     * @return Amount of experience to give
+     */
+    public int getExperienceAmount() {
+        return this.experienceAmount;
+    }
+
+    /**
+     * Set the amount of experience this transaction will give
+     * (takes priority over {@link org.bukkit.event.block.BlockExpEvent})
+     *
+     * @param experienceAmount Amount of experience to give
+     */
+    public void setExperienceAmount(int experienceAmount) {
+        this.experienceAmount = experienceAmount;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}

patches/server/0217-Grindstone-API.patch

@@ -1,5 +1,20 @@
 --- a/net/minecraft/world/inventory/GrindstoneMenu.java
 +++ b/net/minecraft/world/inventory/GrindstoneMenu.java
+@@ -91,11 +_,13 @@
+             @Override
+             public void onTake(Player player, ItemStack stack) {
+                 access.execute((level, blockPos) -> {
++                    ItemStack itemstack = activeQuickItem == null ? stack : activeQuickItem; // Purpur - Grindstone API
+                     if (level instanceof ServerLevel) {
+                         // Paper start - Fire BlockExpEvent on grindstone use
+                         org.bukkit.event.block.BlockExpEvent event = new org.bukkit.event.block.BlockExpEvent(org.bukkit.craftbukkit.block.CraftBlock.at(level, blockPos), this.getExperienceAmount(level));
+                         event.callEvent();
+-                        ExperienceOrb.award((ServerLevel) level, Vec3.atCenterOf(blockPos), event.getExpToDrop(), org.bukkit.entity.ExperienceOrb.SpawnReason.GRINDSTONE, player);
++                        org.purpurmc.purpur.event.inventory.GrindstoneTakeResultEvent grindstoneTakeResultEvent = new org.purpurmc.purpur.event.inventory.GrindstoneTakeResultEvent(player.getBukkitEntity(), getBukkitView(), org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemstack), event.getExpToDrop()); grindstoneTakeResultEvent.callEvent(); // Purpur - Grindstone API
++                        ExperienceOrb.award((ServerLevel) level, Vec3.atCenterOf(blockPos), grindstoneTakeResultEvent.getExperienceAmount(), org.bukkit.entity.ExperienceOrb.SpawnReason.GRINDSTONE, player); // Purpur - Grindstone API
+                         // Paper end - Fire BlockExpEvent on grindstone use
+                     }
+ 
 @@ -124,7 +_,7 @@
                  for (Entry<Holder<Enchantment>> entry : enchantmentsForCrafting.entrySet()) {
                      Holder<Enchantment> holder = entry.getKey();
@@ -111,3 +126,13 @@
          return item;
      }
 
+@@ -278,7 +_,9 @@
+                 return ItemStack.EMPTY;
+             }
+ 
++            this.activeQuickItem = itemStack; // Purpur - Grindstone API
+             slot.onTake(player, item);
++            this.activeQuickItem = null; // Purpur - Grindstone API
+         }
+ 
+         return itemStack;