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 89a62fbeeb78c864938a1cea84178478c6dc1b34..57d92c1785586dfab2b3934733d8ba253e042e2e 100644
--- a/src/main/java/net/minecraft/world/level/block/Block.java
+++ b/src/main/java/net/minecraft/world/level/block/Block.java
@@ -314,6 +314,24 @@ public class Block extends BlockBehaviour implements ItemLike {
 
     }
 
+    // Paper start - Add BlockBreakBlockEvent
+    public static boolean dropResources(BlockState state, LevelAccessor levelAccessor, BlockPos pos, @Nullable BlockEntity blockEntity, BlockPos source) {
+        if (levelAccessor instanceof ServerLevel serverLevel) {
+            List<org.bukkit.inventory.ItemStack> items = new java.util.ArrayList<>();
+            for (ItemStack drop : Block.getDrops(state, serverLevel, 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(levelAccessor, pos), org.bukkit.craftbukkit.block.CraftBlock.at(levelAccessor, source), items);
+            event.callEvent();
+            for (org.bukkit.inventory.ItemStack drop : event.getDrops()) {
+                popResource(serverLevel, pos, org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(drop));
+            }
+            state.spawnAfterBreak(serverLevel, pos, ItemStack.EMPTY, true);
+        }
+        return true;
+    }
+    // Paper end - Add BlockBreakBlockEvent
+
     public static void dropResources(BlockState state, Level world, BlockPos pos, @Nullable BlockEntity blockEntity, @Nullable Entity entity, ItemStack tool) {
         if (world instanceof ServerLevel) {
             Block.getDrops(state, (ServerLevel) world, pos, blockEntity, entity, tool).forEach((itemstack1) -> {
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 3ae61e7b50bfc440c597f88843f92903f8a66801..0dbdcd443fe8a299119ea5ba3acb1a0412856184 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
@@ -402,7 +402,7 @@ 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 - Add BlockBreakBlockEvent
                 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 0aeb9faa1ce22359361741a591aa3d465d955970..a98ab20814cc29a25e9d29adfbb7e70d46768df2 100644
--- a/src/main/java/net/minecraft/world/level/material/FlowingFluid.java
+++ b/src/main/java/net/minecraft/world/level/material/FlowingFluid.java
@@ -295,7 +295,7 @@ 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 - Add BlockBreakBlockEvent
             }
 
             world.setBlock(pos, fluidState.createLegacyBlock(), 3);
@@ -303,6 +303,7 @@ public abstract class FlowingFluid extends Fluid {
 
     }
 
+    protected void beforeDestroyingBlock(LevelAccessor world, BlockPos pos, BlockState state, BlockPos source) { beforeDestroyingBlock(world, pos, state); } // Paper - Add BlockBreakBlockEvent
     protected abstract void beforeDestroyingBlock(LevelAccessor world, BlockPos pos, BlockState state);
 
     private static short getCacheKey(BlockPos from, BlockPos to) {
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..c5f9eda32f2cd172569c7b7d72f5dd3e41a34a70 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 - Add BlockBreakBlockEvent
+    @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 - Add BlockBreakBlockEvent
     @Override
     protected void beforeDestroyingBlock(LevelAccessor world, BlockPos pos, BlockState state) {
         BlockEntity blockEntity = state.hasBlockEntity() ? world.getBlockEntity(pos) : null;