From cb5d0df8f262c31ce24f9cd39a70d2974420b95f 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 402d8d7d63..7444f4621e 100644
--- a/src/main/java/net/minecraft/server/PortalTravelAgent.java
+++ b/src/main/java/net/minecraft/server/PortalTravelAgent.java
@@ -48,6 +48,9 @@ public class PortalTravelAgent {
             byte b0 = 1;
             byte b1 = 0;
 
+            java.util.Collection<org.bukkit.block.Block> bukkitBlocks = new java.util.HashSet<>(); // Paper
+            java.util.Map<BlockPosition, IBlockData> nmsBlocks = new java.util.LinkedHashMap<>(); // Paper
+
             for (int l = -2; l <= 2; ++l) {
                 for (int i1 = -2; i1 <= 2; ++i1) {
                     for (int j1 = -1; j1 < 3; ++j1) {
@@ -56,11 +59,22 @@ 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
+            org.bukkit.event.world.PortalCreateEvent event = new org.bukkit.event.world.PortalCreateEvent(bukkitBlocks, this.world.getWorld(), org.bukkit.event.world.PortalCreateEvent.CreateReason.OBC_DESTINATION);
+            if (event.callEvent()) {
+                nmsBlocks.forEach(this.world::setTypeUpdate);
+            }
+            // Paper end
+
         // CraftBukkit start
         return new BlockPosition(i, k, k);
     }
@@ -404,6 +418,9 @@ public class PortalTravelAgent {
             l5 = -l5;
         }
 
+        java.util.Collection<org.bukkit.block.Block> bukkitBlocks = new java.util.HashSet<>(); // Paper
+        java.util.Map<BlockPosition, IBlockData> nmsBlocks = new java.util.LinkedHashMap<>(); // Paper
+
         if (d0 < 0.0D) {
             i1 = MathHelper.clamp(i1, 70, this.world.aa() - 10);
             j5 = i1;
@@ -416,8 +433,11 @@ public class PortalTravelAgent {
                         l3 = j2 + (l2 - 1) * l5 - k2 * k5;
                         boolean flag1 = i3 < 0;
 
-                        blockposition_mutableblockposition.c(j3, k3, l3);
-                        this.world.setTypeUpdate(blockposition_mutableblockposition, 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
                     }
                 }
             }
@@ -427,7 +447,11 @@ public class PortalTravelAgent {
             for (l2 = -1; l2 < 4; ++l2) {
                 if (k2 == -1 || k2 == 2 || l2 == -1 || l2 == 3) {
                     blockposition_mutableblockposition.c(i5 + k2 * k5, j5 + l2, j2 + k2 * l5);
-                    this.world.setTypeAndData(blockposition_mutableblockposition, Blocks.OBSIDIAN.getBlockData(), 3);
+                    // Paper start
+                    BlockPosition pos = new BlockPosition(blockposition_mutableblockposition.getX(), blockposition_mutableblockposition.getY(), blockposition_mutableblockposition.getZ());
+                    nmsBlocks.putIfAbsent(pos, Blocks.OBSIDIAN.getBlockData());
+                    bukkitBlocks.add(this.world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ()));
+                    // Paper end
                 }
             }
         }
@@ -437,10 +461,22 @@ public class PortalTravelAgent {
         for (l2 = 0; l2 < 2; ++l2) {
             for (i3 = 0; i3 < 3; ++i3) {
                 blockposition_mutableblockposition.c(i5 + l2 * k5, j5 + i3, j2 + l2 * l5);
-                this.world.setTypeAndData(blockposition_mutableblockposition, iblockdata, 18);
+
+                // Paper start
+                BlockPosition pos = new BlockPosition(blockposition_mutableblockposition.getX(), blockposition_mutableblockposition.getY(), blockposition_mutableblockposition.getZ());
+                nmsBlocks.putIfAbsent(pos, iblockdata);
+                bukkitBlocks.add(this.world.getWorld().getBlockAt(pos.getX(), pos.getY(), pos.getZ()));
+                // Paper end
             }
         }
 
+        // Paper start
+        org.bukkit.event.world.PortalCreateEvent event = new org.bukkit.event.world.PortalCreateEvent(bukkitBlocks, this.world.getWorld(), org.bukkit.event.world.PortalCreateEvent.CreateReason.OBC_DESTINATION);
+        if (event.callEvent()) {
+            nmsBlocks.forEach((pos, data) -> this.world.setTypeAndData(pos, data, 18)); // keep flag in sync with removed call above
+        }
+        // Paper end
+
         return true;
     }
 
-- 
2.18.0