PaperMC/nms-patches/BlockPortal.patch

--- a/net/minecraft/server/BlockPortal.java
+++ b/net/minecraft/server/BlockPortal.java
@@ -4,6 +4,9 @@
 import java.util.Random;
 import javax.annotation.Nullable;
 
+import org.bukkit.event.entity.EntityPortalEnterEvent; // CraftBukkit
+import org.bukkit.event.world.PortalCreateEvent; // CraftBukkit
+
 public class BlockPortal extends BlockHalfTransparent {
 
     public static final BlockStateEnum<EnumDirection.EnumAxis> AXIS = BlockStateEnum.of("axis", EnumDirection.EnumAxis.class, new EnumDirection.EnumAxis[] { EnumDirection.EnumAxis.X, EnumDirection.EnumAxis.Z});
@@ -43,7 +46,8 @@
             }
 
             if (i > 0 && !world.getType(blockposition1.up()).m()) {
-                Entity entity = ItemMonsterEgg.a(world, EntityTypes.getName(EntityPigZombie.class), (double) blockposition1.getX() + 0.5D, (double) blockposition1.getY() + 1.1D, (double) blockposition1.getZ() + 0.5D);
+                // CraftBukkit - set spawn reason to NETHER_PORTAL
+                Entity entity = ItemMonsterEgg.spawnCreature(world, EntityTypes.getName(EntityPigZombie.class), (double) blockposition1.getX() + 0.5D, (double) blockposition1.getY() + 1.1D, (double) blockposition1.getZ() + 0.5D, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.NETHER_PORTAL);
 
                 if (entity != null) {
                     entity.portalCooldown = entity.aE();
@@ -70,14 +74,16 @@
         BlockPortal.Shape blockportal_shape = new BlockPortal.Shape(world, blockposition, EnumDirection.EnumAxis.X);
 
         if (blockportal_shape.d() && blockportal_shape.e == 0) {
-            blockportal_shape.createPortal();
-            return true;
+            // CraftBukkit start - return portalcreator
+            return blockportal_shape.createPortal();
+            // return true;
         } else {
             BlockPortal.Shape blockportal_shape1 = new BlockPortal.Shape(world, blockposition, EnumDirection.EnumAxis.Z);
 
             if (blockportal_shape1.d() && blockportal_shape1.e == 0) {
-                blockportal_shape1.createPortal();
-                return true;
+                return blockportal_shape1.createPortal();
+                // return true;
+                // CraftBukkit end
             } else {
                 return false;
             }
@@ -108,6 +114,10 @@
 
     public void a(World world, BlockPosition blockposition, IBlockData iblockdata, Entity entity) {
         if (!entity.isPassenger() && !entity.isVehicle() && entity.aX()) {
+            // CraftBukkit start - Entity in portal
+            EntityPortalEnterEvent event = new EntityPortalEnterEvent(entity.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), blockposition.getX(), blockposition.getY(), blockposition.getZ()));
+            world.getServer().getPluginManager().callEvent(event);
+            // CraftBukkit end
             entity.e(blockposition);
         }
 
@@ -212,6 +222,7 @@
         private BlockPosition position;
         private int height;
         private int width;
+        java.util.Collection<org.bukkit.block.Block> blocks = new java.util.HashSet<org.bukkit.block.Block>(); // CraftBukkit - add field
 
         public Shape(World world, BlockPosition blockposition, EnumDirection.EnumAxis enumdirection_enumaxis) {
             this.a = world;
@@ -270,6 +281,10 @@
         }
 
         protected int c() {
+            // CraftBukkit start
+            this.blocks.clear();
+            org.bukkit.World bworld = this.a.getWorld();
+            // CraftBukkit end
             int i;
 
             label56:
@@ -290,11 +305,21 @@
                         block = this.a.getType(blockposition.shift(this.d)).getBlock();
                         if (block != Blocks.OBSIDIAN) {
                             break label56;
+                            // CraftBukkit start - add the block to our list
+                        } else {
+                            BlockPosition pos = blockposition.shift(this.d);
+                            blocks.add(bworld.getBlockAt(pos.getX(), pos.getY(), pos.getZ()));
+                            // CraftBukkit end
                         }
                     } else if (i == this.width - 1) {
                         block = this.a.getType(blockposition.shift(this.c)).getBlock();
                         if (block != Blocks.OBSIDIAN) {
                             break label56;
+                            // CraftBukkit start - add the block to our list
+                        } else {
+                            BlockPosition pos = blockposition.shift(this.c);
+                            blocks.add(bworld.getBlockAt(pos.getX(), pos.getY(), pos.getZ()));
+                            // CraftBukkit end
                         }
                     }
                 }
@@ -304,6 +329,11 @@
                 if (this.a.getType(this.position.shift(this.c, i).up(this.height)).getBlock() != Blocks.OBSIDIAN) {
                     this.height = 0;
                     break;
+                    // CraftBukkit start - add the block to our list
+                } else {
+                    BlockPosition pos = this.position.shift(this.c, i).up(this.height);
+                    blocks.add(bworld.getBlockAt(pos.getX(), pos.getY(), pos.getZ()));
+                    // CraftBukkit end
                 }
             }
 
@@ -325,7 +355,27 @@
             return this.position != null && this.width >= 2 && this.width <= 21 && this.height >= 3 && this.height <= 21;
         }
 
-        public void createPortal() {
+        // CraftBukkit start - return boolean
+        public boolean createPortal() {
+            org.bukkit.World bworld = this.a.getWorld();
+
+            // Copy below for loop
+            for (int i = 0; i < this.width; ++i) {
+                BlockPosition blockposition = this.position.shift(this.c, i);
+
+                for (int j = 0; j < this.height; ++j) {
+                    BlockPosition pos = blockposition.up(j);
+                    blocks.add(bworld.getBlockAt(pos.getX(), pos.getY(), pos.getZ()));
+                }
+            }
+
+            PortalCreateEvent event = new PortalCreateEvent(blocks, bworld, PortalCreateEvent.CreateReason.FIRE);
+            this.a.getServer().getPluginManager().callEvent(event);
+
+            if (event.isCancelled()) {
+                return false;
+            }
+            // CraftBukkit end
             for (int i = 0; i < this.width; ++i) {
                 BlockPosition blockposition = this.position.shift(this.c, i);
 
@@ -334,6 +384,7 @@
                 }
             }
 
+            return true; // CraftBukkit
         }
     }
 }