Paper/patches/server/0578-Implement-BlockPreDispenseEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Madeline Miller <mnmiller1@me.com>
Date: Sun, 17 Jan 2021 13:16:09 +1000
Subject: [PATCH] Implement BlockPreDispenseEvent


diff --git a/src/main/java/net/minecraft/world/level/block/DispenserBlock.java b/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
index 07d357b5fcb30ed9ff074a196a19de1481fe3738..83ac86b3c1e7b9233f2db8e5488f97c5b44f8843 100644
--- a/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
@@ -92,6 +92,7 @@ public class DispenserBlock extends BaseEntityBlock {
             DispenseItemBehavior idispensebehavior = this.getDispenseMethod(itemstack);
 
             if (idispensebehavior != DispenseItemBehavior.NOOP) {
+                if (!org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockPreDispenseEvent(world, pos, itemstack, i)) return; // Paper - BlockPreDispenseEvent is called here
                 DispenserBlock.eventFired = false; // CraftBukkit - reset event status
                 tileentitydispenser.setItem(i, idispensebehavior.dispense(sourceblock, itemstack));
             }
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 419c5bd638230c31dd68ba37174c8057c0229a6a..eda17a60afd6cf03e58e66b2dbfe414b1cfac9d5 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -1848,5 +1848,11 @@ public class CraftEventFactory {
         io.papermc.paper.event.block.BlockFailedDispenseEvent event = new io.papermc.paper.event.block.BlockFailedDispenseEvent(block);
         return event.callEvent();
     }
+
+    public static boolean handleBlockPreDispenseEvent(ServerLevel serverLevel, BlockPos pos, ItemStack itemStack, int slot) {
+        org.bukkit.block.Block block = serverLevel.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ());
+        io.papermc.paper.event.block.BlockPreDispenseEvent event = new io.papermc.paper.event.block.BlockPreDispenseEvent(block, org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemStack), slot);
+        return event.callEvent();
+    }
     // Paper end
 }