Paper/patches/server/0781-Improve-PortalEvents.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Thu, 15 Dec 2022 10:33:39 -0800
Subject: [PATCH] Improve PortalEvents


diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 96dff63230e8cda1f5e548d914c119bd64b5ac33..7270b6fa96bae937663c0fea77887e21fbd0eb57 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -1340,7 +1340,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player {
                 }
                 // CraftBukkit start
                 Location enter = this.getBukkitEntity().getLocation();
-                Location exit = (worldserver == null) ? null : CraftLocation.toBukkit(teleportTarget.pos(), worldserver.getWorld(), teleportTarget.yRot(), teleportTarget.xRot());
+                Location exit =/* (worldserver == null) ? null : // Paper - always non-null */CraftLocation.toBukkit(teleportTarget.pos(), worldserver.getWorld(), teleportTarget.yRot(), teleportTarget.xRot());
                 PlayerTeleportEvent tpEvent = new PlayerTeleportEvent(this.getBukkitEntity(), enter, exit, teleportTarget.cause());
                 Bukkit.getServer().getPluginManager().callEvent(tpEvent);
                 if (tpEvent.isCancelled() || tpEvent.getTo() == null) {
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index d5df4ddb33600479e6edb93a18db9400ffc6c699..9958be86d769b9fd17b6d24d0c4f1e96b65dfb08 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -3529,7 +3529,15 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
         org.bukkit.entity.Entity bukkitEntity = entity.getBukkitEntity();
         Location enter = bukkitEntity.getLocation();
 
-        EntityPortalEvent event = new EntityPortalEvent(bukkitEntity, enter, exit, searchRadius, true, creationRadius);
+        // Paper start
+        final org.bukkit.PortalType portalType = switch (cause) {
+            case END_PORTAL -> org.bukkit.PortalType.ENDER;
+            case NETHER_PORTAL -> org.bukkit.PortalType.NETHER;
+            case END_GATEWAY -> org.bukkit.PortalType.END_GATEWAY; // not actually used yet
+            default -> org.bukkit.PortalType.CUSTOM;
+        };
+        EntityPortalEvent event = new EntityPortalEvent(bukkitEntity, enter, exit, searchRadius, true, creationRadius, portalType);
+        // Paper end
         event.getEntity().getServer().getPluginManager().callEvent(event);
         if (event.isCancelled() || event.getTo() == null || event.getTo().getWorld() == null || !entity.isAlive()) {
             return null;
diff --git a/src/main/java/net/minecraft/world/level/block/EndGatewayBlock.java b/src/main/java/net/minecraft/world/level/block/EndGatewayBlock.java
index 11486419dd98a013c7387d3d73f322a95a18c574..3f5bb5c9ceb5b31fcc9ef0a7a6157e1e1cb2a09f 100644
--- a/src/main/java/net/minecraft/world/level/block/EndGatewayBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/EndGatewayBlock.java
@@ -92,6 +92,10 @@ public class EndGatewayBlock extends BaseEntityBlock implements Portal {
     protected void entityInside(BlockState state, Level world, BlockPos pos, Entity entity) {
         if (!new io.papermc.paper.event.entity.EntityInsideBlockEvent(entity.getBukkitEntity(), org.bukkit.craftbukkit.block.CraftBlock.at(world, pos)).callEvent()) { return; } // Paper - Add EntityInsideBlockEvent
         if (entity.canUsePortal(false)) {
+            // Paper start - call EntityPortalEnterEvent
+            org.bukkit.event.entity.EntityPortalEnterEvent event = new org.bukkit.event.entity.EntityPortalEnterEvent(entity.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ()), org.bukkit.PortalType.END_GATEWAY); // Paper - add portal type
+            if (!event.callEvent()) return;
+            // Paper end - call EntityPortalEnterEvent
             BlockEntity tileentity = world.getBlockEntity(pos);
 
             if (!world.isClientSide && tileentity instanceof TheEndGatewayBlockEntity) {
diff --git a/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java b/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java
index 28fba1448309805fc3d687de6bc8454d2c85fcd3..a35a426cc7778a51523f26057b5d61b8a3e23d5d 100644
--- a/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/EndPortalBlock.java
@@ -66,8 +66,9 @@ public class EndPortalBlock extends BaseEntityBlock implements Portal {
         if (!new io.papermc.paper.event.entity.EntityInsideBlockEvent(entity.getBukkitEntity(), org.bukkit.craftbukkit.block.CraftBlock.at(world, pos)).callEvent()) { return; } // Paper - Add EntityInsideBlockEvent
         if (entity.canUsePortal(false) && Shapes.joinIsNotEmpty(Shapes.create(entity.getBoundingBox().move((double) (-pos.getX()), (double) (-pos.getY()), (double) (-pos.getZ()))), state.getShape(world, pos), BooleanOp.AND)) {
             // CraftBukkit start - Entity in portal
-            EntityPortalEnterEvent event = new EntityPortalEnterEvent(entity.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ()));
+            EntityPortalEnterEvent event = new EntityPortalEnterEvent(entity.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ()), org.bukkit.PortalType.ENDER); // Paper - add portal type
             world.getCraftServer().getPluginManager().callEvent(event);
+            if (event.isCancelled()) return; // Paper - make cancellable
             // CraftBukkit end
             if (!world.isClientSide && world.dimension() == Level.END && entity instanceof ServerPlayer) {
                 ServerPlayer entityplayer = (ServerPlayer) entity;
@@ -90,7 +91,7 @@ public class EndPortalBlock extends BaseEntityBlock implements Portal {
         ServerLevel worldserver1 = world.getServer().getLevel(resourcekey);
 
         if (worldserver1 == null) {
-            return new DimensionTransition(PlayerTeleportEvent.TeleportCause.END_PORTAL); // CraftBukkit- always fire event in case plugins wish to change it
+            return null; // Paper - keep previous behavior of not firing PlayerTeleportEvent if the target world doesn't exist
         } else {
             boolean flag = resourcekey == Level.END;
             BlockPos blockposition1 = flag ? ServerLevel.END_SPAWN_POINT : worldserver1.getSharedSpawnPos();
diff --git a/src/main/java/net/minecraft/world/level/block/NetherPortalBlock.java b/src/main/java/net/minecraft/world/level/block/NetherPortalBlock.java
index 417a9ab28d247d5fbb3f1097fdeccab7ad2a793b..0fdbcab175b51a8b77646e0e4a267d987b133a35 100644
--- a/src/main/java/net/minecraft/world/level/block/NetherPortalBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/NetherPortalBlock.java
@@ -110,8 +110,9 @@ public class NetherPortalBlock extends Block implements Portal {
         if (!new io.papermc.paper.event.entity.EntityInsideBlockEvent(entity.getBukkitEntity(), org.bukkit.craftbukkit.block.CraftBlock.at(world, pos)).callEvent()) { return; } // Paper - Add EntityInsideBlockEvent
         if (entity.canUsePortal(false)) {
             // CraftBukkit start - Entity in portal
-            EntityPortalEnterEvent event = new EntityPortalEnterEvent(entity.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ()));
+            EntityPortalEnterEvent event = new EntityPortalEnterEvent(entity.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), pos.getX(), pos.getY(), pos.getZ()), org.bukkit.PortalType.NETHER); // Paper - add portal type
             world.getCraftServer().getPluginManager().callEvent(event);
+            if (event.isCancelled()) return; // Paper - make cancellable
             // CraftBukkit end
             entity.setAsInsidePortal(this, pos);
         }
@@ -143,7 +144,7 @@ public class NetherPortalBlock extends Block implements Portal {
         // Paper end - Add EntityPortalReadyEvent
 
         if (worldserver1 == null) {
-            return new DimensionTransition(PlayerTeleportEvent.TeleportCause.NETHER_PORTAL); // always fire event in case plugins wish to change it
+            return null; // Paper - keep previous behavior of not firing PlayerTeleportEvent if the target world doesn't exist
         } else {
             boolean flag = worldserver1.getTypeKey() == LevelStem.NETHER;
             // CraftBukkit end
diff --git a/src/main/java/net/minecraft/world/level/portal/DimensionTransition.java b/src/main/java/net/minecraft/world/level/portal/DimensionTransition.java
index 788f79dc38012595b385ee6a449daa0bccf0079a..36c8735312c885eb153f4ffdf0f2a5495e9c9f65 100644
--- a/src/main/java/net/minecraft/world/level/portal/DimensionTransition.java
+++ b/src/main/java/net/minecraft/world/level/portal/DimensionTransition.java
@@ -15,9 +15,7 @@ public record DimensionTransition(ServerLevel newLevel, Vec3 pos, Vec3 speed, fl
         this(newLevel, pos, speed, yRot, xRot, missingRespawnBlock, postDimensionTransition, PlayerTeleportEvent.TeleportCause.UNKNOWN);
     }
 
-    public DimensionTransition(PlayerTeleportEvent.TeleportCause cause) {
-        this(null, Vec3.ZERO, Vec3.ZERO, 0.0F, 0.0F, false, DO_NOTHING, cause);
-    }
+    // Paper - remove unused constructor (for safety)
     // CraftBukkit end
 
     public static final DimensionTransition.PostDimensionTransition DO_NOTHING = (entity) -> {