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path: root/patches/server/0742-Move-BlockPistonRetractEvent-to-fix-duplication.patch
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Madeline Miller <mnmiller1@me.com>
Date: Sun, 22 Aug 2021 22:17:18 +1000
Subject: [PATCH] Move BlockPistonRetractEvent to fix duplication


diff --git a/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java b/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
index dd50a29d47a62df8cdfd69358218d1559b6794ef..3678f75822b55c3c4c77565893269af4b7f9d8c9 100644
--- a/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/piston/PistonBaseBlock.java
@@ -147,14 +147,14 @@ public class PistonBaseBlock extends DirectionalBlock {
             }
 
             // CraftBukkit start
-            //if (!this.sticky) { // Paper - Prevents empty sticky pistons from firing retract - history behind is odd
-                org.bukkit.block.Block block = world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ());
-                BlockPistonRetractEvent event = new BlockPistonRetractEvent(block, ImmutableList.<org.bukkit.block.Block>of(), CraftBlock.notchToBlockFace(enumdirection));
-                world.getCraftServer().getPluginManager().callEvent(event);
-
-                if (event.isCancelled()) {
-                    return;
-                }
+            //if (!this.sticky) { // Paper - Prevents empty sticky pistons from firing retract - history behind is odd - Move further down
+            //  org.bukkit.block.Block block = world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ());
+            //  BlockPistonRetractEvent event = new BlockPistonRetractEvent(block, ImmutableList.<org.bukkit.block.Block>of(), CraftBlock.notchToBlockFace(enumdirection));
+            //  world.getCraftServer().getPluginManager().callEvent(event);
+
+            //  if (event.isCancelled()) {
+            //    return;
+            //  }
             //} // Paper
             // PAIL: checkME - what happened to setTypeAndData?
             // CraftBukkit end
@@ -237,6 +237,15 @@ public class PistonBaseBlock extends DirectionalBlock {
 
             BlockState iblockdata1 = (BlockState) ((BlockState) Blocks.MOVING_PISTON.defaultBlockState().setValue(MovingPistonBlock.FACING, enumdirection)).setValue(MovingPistonBlock.TYPE, this.isSticky ? PistonType.STICKY : PistonType.DEFAULT);
 
+            // Paper - Move empty piston retract call to fix duplication
+            org.bukkit.block.Block block = world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ());
+            BlockPistonRetractEvent event = new BlockPistonRetractEvent(block, ImmutableList.<org.bukkit.block.Block>of(), CraftBlock.notchToBlockFace(enumdirection));
+            world.getCraftServer().getPluginManager().callEvent(event);
+
+            if (event.isCancelled()) {
+                return false;
+            } // Paper
+
             world.setBlock(pos, iblockdata1, 20);
             world.setBlockEntity(MovingPistonBlock.newMovingBlockEntity(pos, iblockdata1, (BlockState) this.defaultBlockState().setValue(PistonBaseBlock.FACING, Direction.from3DDataValue(data & 7)), enumdirection, false, true)); // Paper - diff on change
             world.blockUpdated(pos, iblockdata1.getBlock());