From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Sun, 3 Jan 2021 17:58:11 -0800
Subject: [PATCH] Add BlockBreakBlockEvent


diff --git a/src/main/java/net/minecraft/world/level/block/Block.java b/src/main/java/net/minecraft/world/level/block/Block.java
index f595e64d6f9509c04ed6dac00205136c17c67edd..7b71073027f4cf79736546500ededdfbb83d968e 100644
--- a/src/main/java/net/minecraft/world/level/block/Block.java
+++ b/src/main/java/net/minecraft/world/level/block/Block.java
@@ -331,6 +331,23 @@ public class Block extends BlockBehaviour implements ItemLike {
         }
 
     }
+    // Paper start
+    public static boolean dropResources(BlockState state, LevelAccessor world, BlockPos pos, @Nullable BlockEntity blockEntity, BlockPos source) {
+        if (world instanceof ServerLevel) {
+            List<org.bukkit.inventory.ItemStack> items = com.google.common.collect.Lists.newArrayList();
+            for (net.minecraft.world.item.ItemStack drop : net.minecraft.world.level.block.Block.getDrops(state, world.getMinecraftWorld(), pos, blockEntity)) {
+                items.add(org.bukkit.craftbukkit.inventory.CraftItemStack.asBukkitCopy(drop));
+            }
+            io.papermc.paper.event.block.BlockBreakBlockEvent event = new io.papermc.paper.event.block.BlockBreakBlockEvent(org.bukkit.craftbukkit.block.CraftBlock.at(world, pos), org.bukkit.craftbukkit.block.CraftBlock.at(world, source), items);
+            event.callEvent();
+            for (var drop : event.getDrops()) {
+                popResource(world.getMinecraftWorld(), pos, org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(drop));
+            }
+            state.spawnAfterBreak(world.getMinecraftWorld(), pos, ItemStack.EMPTY, true);
+        }
+        return true;
+    }
+    // Paper end
 
     public static void dropResources(BlockState state, Level world, BlockPos pos, @Nullable BlockEntity blockEntity, Entity entity, ItemStack stack) {
         if (world instanceof ServerLevel) {
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 8d73893100884c08aa552ff41c2a07a3e714df47..24a822ade17849a083161216c184f02c30b5cb1f 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
@@ -400,7 +400,7 @@ public class PistonBaseBlock extends DirectionalBlock {
                 iblockdata1 = world.getBlockState(blockposition3);
                 BlockEntity tileentity = iblockdata1.hasBlockEntity() ? world.getBlockEntity(blockposition3) : null;
 
-                dropResources(iblockdata1, world, blockposition3, tileentity);
+                dropResources(iblockdata1, world, blockposition3, tileentity, pos); // Paper
                 world.setBlock(blockposition3, Blocks.AIR.defaultBlockState(), 18);
                 world.gameEvent(GameEvent.BLOCK_DESTROY, blockposition3, GameEvent.Context.of(iblockdata1));
                 if (!iblockdata1.is(BlockTags.FIRE)) {
diff --git a/src/main/java/net/minecraft/world/level/material/FlowingFluid.java b/src/main/java/net/minecraft/world/level/material/FlowingFluid.java
index fb0784c8a4950776bd270bec3c80a8c5856c2655..0ffc131baf5c0edc4f2ca0f466fcdb20be4a47b8 100644
--- a/src/main/java/net/minecraft/world/level/material/FlowingFluid.java
+++ b/src/main/java/net/minecraft/world/level/material/FlowingFluid.java
@@ -294,7 +294,7 @@ public abstract class FlowingFluid extends Fluid {
             ((LiquidBlockContainer) state.getBlock()).placeLiquid(world, pos, state, fluidState);
         } else {
             if (!state.isAir()) {
-                this.beforeDestroyingBlock(world, pos, state);
+                this.beforeDestroyingBlock(world, pos, state, pos.relative(direction.getOpposite())); // Paper
             }
 
             world.setBlock(pos, fluidState.createLegacyBlock(), 3);
@@ -302,6 +302,7 @@ public abstract class FlowingFluid extends Fluid {
 
     }
 
+    protected void beforeDestroyingBlock(LevelAccessor world, BlockPos pos, BlockState state, BlockPos source) { beforeDestroyingBlock(world, pos, state); } // Paper - add source parameter
     protected abstract void beforeDestroyingBlock(LevelAccessor world, BlockPos pos, BlockState state);
 
     private static short getCacheKey(BlockPos blockposition, BlockPos blockposition1) {
diff --git a/src/main/java/net/minecraft/world/level/material/WaterFluid.java b/src/main/java/net/minecraft/world/level/material/WaterFluid.java
index 1897c0012800d5ba9d2fc386f3e2bf57c9d878bb..82e85fbbd45244d02df90fa00c9046e7f51275a2 100644
--- a/src/main/java/net/minecraft/world/level/material/WaterFluid.java
+++ b/src/main/java/net/minecraft/world/level/material/WaterFluid.java
@@ -64,6 +64,13 @@ public abstract class WaterFluid extends FlowingFluid {
         return world.getGameRules().getBoolean(GameRules.RULE_WATER_SOURCE_CONVERSION);
     }
 
+    // Paper start
+    @Override
+    protected void beforeDestroyingBlock(LevelAccessor world, BlockPos pos, BlockState state,  BlockPos source) {
+        BlockEntity tileentity = state.hasBlockEntity() ? world.getBlockEntity(pos) : null;
+        Block.dropResources(state, world, pos, tileentity, source);
+    }
+    // Paper end
     @Override
     protected void beforeDestroyingBlock(LevelAccessor world, BlockPos pos, BlockState state) {
         BlockEntity blockEntity = state.hasBlockEntity() ? world.getBlockEntity(pos) : null;