From 07002b8cac576afa02cc8be735a4f125d9c973cc Mon Sep 17 00:00:00 2001
From: MiniDigger <admin@minidigger.me>
Date: Sun, 18 Mar 2018 15:44:44 +0100
Subject: [PATCH] Call PortalCreateEvent for exit portals


diff --git a/src/main/java/net/minecraft/server/PortalTravelAgent.java b/src/main/java/net/minecraft/server/PortalTravelAgent.java
index f49729796..42e4b2d01 100644
--- a/src/main/java/net/minecraft/server/PortalTravelAgent.java
+++ b/src/main/java/net/minecraft/server/PortalTravelAgent.java
@@ -3,10 +3,17 @@ package net.minecraft.server;
 import it.unimi.dsi.fastutil.longs.Long2ObjectMap;
 import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
 import it.unimi.dsi.fastutil.objects.ObjectIterator;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
 import java.util.Random;
 // CraftBukkit start
 import org.bukkit.Location;
+import org.bukkit.block.Block;
 import org.bukkit.event.entity.EntityPortalExitEvent;
+import org.bukkit.event.world.PortalCreateEvent;
 import org.bukkit.util.Vector;
 // CraftBukkit end
 
@@ -47,6 +54,9 @@ public class PortalTravelAgent {
             byte b0 = 1;
             byte b1 = 0;
 
+            Collection<Block> bukkitBlocks = new HashSet<>(); // Paper
+            Map<BlockPosition, IBlockData> nmsBlocks = new HashMap<>(); // Paper
+
             for (int l = -2; l <= 2; ++l) {
                 for (int i1 = -2; i1 <= 2; ++i1) {
                     for (int j1 = -1; j1 < 3; ++j1) {
@@ -55,11 +65,22 @@ public class PortalTravelAgent {
                         int i2 = k + i1 * 0 - l * 1;
                         boolean flag2 = j1 < 0;
 
-                        this.world.setTypeUpdate(new BlockPosition(k1, l1, i2), flag2 ? Blocks.OBSIDIAN.getBlockData() : Blocks.AIR.getBlockData());
+                        // Paper start
+                        BlockPosition pos = new BlockPosition(k1, l1, i2);
+                        nmsBlocks.putIfAbsent(pos, flag2 ? Blocks.OBSIDIAN.getBlockData() : Blocks.AIR.getBlockData());
+                        bukkitBlocks.add(this.world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ()));
+                        // Paper end
                     }
                 }
             }
 
+            // Paper start
+            PortalCreateEvent event = new PortalCreateEvent(bukkitBlocks, this.world.getWorld(), PortalCreateEvent.CreateReason.OBC_DESTINATION);
+            if(event.callEvent()){
+                nmsBlocks.forEach(this.world::setTypeUpdate);
+            }
+            // Paper end
+
         // CraftBukkit start
         return new BlockPosition(i, k, k);
     }
@@ -403,6 +424,9 @@ public class PortalTravelAgent {
             l5 = -l5;
         }
 
+        Collection<Block> bukkitBlocks = new HashSet<>(); // Paper
+        Map<BlockPosition, IBlockData> nmsBlocks = new HashMap<>(); // Paper
+
         if (d0 < 0.0D) {
             i1 = MathHelper.clamp(i1, 70, this.world.ab() - 10);
             j5 = i1;
@@ -415,7 +439,11 @@ public class PortalTravelAgent {
                         l3 = j2 + (l2 - 1) * l5 - k2 * k5;
                         boolean flag1 = i3 < 0;
 
-                        this.world.setTypeUpdate(new BlockPosition(j3, k3, l3), flag1 ? Blocks.OBSIDIAN.getBlockData() : Blocks.AIR.getBlockData());
+                        // Paper start
+                        BlockPosition pos = new BlockPosition(j3, k3, l3);
+                        nmsBlocks.putIfAbsent(pos, flag1 ? Blocks.OBSIDIAN.getBlockData() : Blocks.AIR.getBlockData());
+                        bukkitBlocks.add(this.world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ()));
+                        // Paper end
                     }
                 }
             }
@@ -431,7 +459,11 @@ public class PortalTravelAgent {
                     i4 = j2 + (i3 - 1) * l5;
                     boolean flag2 = i3 == 0 || i3 == 3 || j3 == -1 || j3 == 3;
 
-                    this.world.setTypeAndData(new BlockPosition(k3, l3, i4), flag2 ? Blocks.OBSIDIAN.getBlockData() : iblockdata, 2);
+                    // Paper start
+                    BlockPosition pos = new BlockPosition(k3, l3, i4);
+                    nmsBlocks.putIfAbsent(pos, flag2 ? Blocks.OBSIDIAN.getBlockData() : iblockdata);
+                    bukkitBlocks.add(this.world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ()));
+                    // Paper end
                 }
             }
 
@@ -447,6 +479,13 @@ public class PortalTravelAgent {
             }
         }
 
+        // Paper start
+        PortalCreateEvent event = new PortalCreateEvent(bukkitBlocks, this.world.getWorld(), PortalCreateEvent.CreateReason.OBC_DESTINATION);
+        if(event.callEvent()){
+            nmsBlocks.forEach((pos, data) -> this.world.setTypeAndData(pos, data, 2));
+        }
+        // Paper end
+
         return true;
     }
 
-- 
2.16.2