From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
Date: Sun, 5 Dec 2021 14:58:17 -0500
Subject: [PATCH] Expand FallingBlock API

- add auto expire setting
- add setter for block data
- add accessors for block state

== AT ==
public net.minecraft.world.entity.item.FallingBlockEntity blockState

Co-authored-by: Lukas Planz <lukas.planz@web.de>

diff --git a/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java b/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
index 72abeb4f37b70094498ed3b18e8f73346ba0ead0..0ecda05a98046938546fe7bc6cf2590c886add41 100644
--- a/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
+++ b/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
@@ -71,6 +71,7 @@ public class FallingBlockEntity extends Entity {
     public CompoundTag blockData;
     public boolean forceTickAfterTeleportToDuplicate;
     protected static final EntityDataAccessor<BlockPos> DATA_START_POS = SynchedEntityData.defineId(FallingBlockEntity.class, EntityDataSerializers.BLOCK_POS);
+    public boolean autoExpire = true; // Paper - Expand FallingBlock API
 
     public FallingBlockEntity(EntityType<? extends FallingBlockEntity> type, Level world) {
         super(type, world);
@@ -191,7 +192,7 @@ public class FallingBlockEntity extends Entity {
                     }
 
                     if (!this.onGround() && !flag1) {
-                        if (this.time > 100 && (blockposition.getY() <= this.level().getMinY() || blockposition.getY() > this.level().getMaxY()) || this.time > 600) {
+                        if ((this.time > 100 && autoExpire) && (blockposition.getY() <= this.level().getMinY() || blockposition.getY() > this.level().getMaxY()) || (this.time > 600 && autoExpire)) { // Paper - Expand FallingBlock API
                             if (this.dropItem && worldserver.getGameRules().getBoolean(GameRules.RULE_DOENTITYDROPS)) {
                                 this.spawnAtLocation(worldserver, (ItemLike) block);
                             }
@@ -338,6 +339,7 @@ public class FallingBlockEntity extends Entity {
         }
 
         nbt.putBoolean("CancelDrop", this.cancelDrop);
+        if (!autoExpire) {nbt.putBoolean("Paper.AutoExpire", false);} // Paper - Expand FallingBlock API
     }
 
     @Override
@@ -365,6 +367,11 @@ public class FallingBlockEntity extends Entity {
             this.blockState = Blocks.SAND.defaultBlockState();
         }
 
+        // Paper start - Expand FallingBlock API
+         if (nbt.contains("Paper.AutoExpire")) {
+            this.autoExpire = nbt.getBoolean("Paper.AutoExpire");
+         }
+        // Paper end - Expand FallingBlock API
     }
 
     public void setHurtsEntities(float fallHurtAmount, int fallHurtMax) {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftFallingBlock.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftFallingBlock.java
index a7a3f74b846112d752fe04162b30805961457b11..1359d25a32b4a5d5e8e68ce737bd19f7b5afaf69 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftFallingBlock.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftFallingBlock.java
@@ -33,6 +33,31 @@ public class CraftFallingBlock extends CraftEntity implements FallingBlock {
     public BlockData getBlockData() {
         return CraftBlockData.fromData(this.getHandle().getBlockState());
     }
+    // Paper start - Expand FallingBlock API
+    @Override
+    public void setBlockData(final BlockData blockData) {
+        Preconditions.checkArgument(blockData != null, "blockData");
+        final net.minecraft.world.level.block.state.BlockState oldState = this.getHandle().blockState, newState = ((CraftBlockData) blockData).getState();
+        this.getHandle().blockState = newState;
+        this.getHandle().blockData = null;
+
+        if (oldState != newState) this.update();
+    }
+
+    @Override
+    public org.bukkit.block.BlockState getBlockState() {
+        return org.bukkit.craftbukkit.block.CraftBlockStates.getBlockState(this.getHandle().blockState, this.getHandle().blockData);
+    }
+
+    @Override
+    public void setBlockState(final org.bukkit.block.BlockState blockState) {
+        Preconditions.checkArgument(blockState != null, "blockState");
+        // Calls #update if needed, the block data compound tag is not synced with the client and hence can be mutated after the sync with clients.
+        // The call also clears any potential old block data.
+        this.setBlockData(blockState.getBlockData());
+        if (blockState instanceof final org.bukkit.craftbukkit.block.CraftBlockEntityState<?> tileEntity) this.getHandle().blockData = tileEntity.getSnapshotNBT();
+    }
+    // Paper end - Expand FallingBlock API
 
     @Override
     public boolean getDropItem() {
@@ -101,4 +126,15 @@ public class CraftFallingBlock extends CraftEntity implements FallingBlock {
             this.setHurtEntities(true);
         }
     }
+    // Paper start - Expand FallingBlock API
+    @Override
+    public boolean doesAutoExpire() {
+        return this.getHandle().autoExpire;
+    }
+
+    @Override
+    public void shouldAutoExpire(boolean autoExpires) {
+        this.getHandle().autoExpire = autoExpires;
+    }
+    // Paper end - Expand FallingBlock API
 }