Fix EntityPortalExitEvent not being called (#5617)

patches/api/add-back-EntityPortalExitEvent.patch

@@ -0,0 +1,21 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <jake.m.potrebic@gmail.com>
+Date: Wed, 12 May 2021 02:49:28 -0700
+Subject: [PATCH] add back EntityPortalExitEvent
+
+Was removed here: https://hub.spigotmc.org/stash/projects/SPIGOT/repos/craftbukkit/commits/a2d787f6ebeb72fa7d5750788221fb9a0d838ac4
+
+diff --git a/src/main/java/org/bukkit/event/entity/EntityPortalExitEvent.java b/src/main/java/org/bukkit/event/entity/EntityPortalExitEvent.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/event/entity/EntityPortalExitEvent.java
++++ b/src/main/java/org/bukkit/event/entity/EntityPortalExitEvent.java
+@@ -0,0 +0,0 @@ import org.jetbrains.annotations.NotNull;
+  * <p>
+  * This event allows you to modify the velocity of the entity after they have
+  * successfully exited the portal.
++ * <p>
++ * Cancelling this event does not prevent the teleport, but it does prevent
++ * any changes to velocity and location from taking place.
+  */
+ public class EntityPortalExitEvent extends EntityTeleportEvent {
+     private static final HandlerList handlers = new HandlerList();

patches/server/Add-back-EntityPortalExitEvent.patch

@@ -0,0 +1,41 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <jake.m.potrebic@gmail.com>
+Date: Sun, 16 May 2021 09:39:46 -0700
+Subject: [PATCH] Add back EntityPortalExitEvent
+
+
+diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/entity/Entity.java
++++ b/src/main/java/net/minecraft/world/entity/Entity.java
+@@ -0,0 +0,0 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
+             if (shapedetectorshape == null) {
+                 return null;
+             } else {
++                // Paper start - Call EntityPortalExitEvent
++                Vec3 position = shapedetectorshape.pos;
++                float yaw = shapedetectorshape.yRot;
++                float pitch = shapedetectorshape.xRot;
++                Vec3 velocity = shapedetectorshape.speed;
++                org.bukkit.event.entity.EntityPortalExitEvent event = new org.bukkit.event.entity.EntityPortalExitEvent(this.getBukkitEntity(), this.getBukkitEntity().getLocation(), shapedetectorshape.portalEventInfo.getTo(), this.getBukkitEntity().getVelocity(), org.bukkit.craftbukkit.util.CraftVector.toBukkit(shapedetectorshape.speed));
++                if (event.callEvent() && event.getTo() != null && this.isAlive()) {
++                    position = Vec3.atLowerCornerOf(MCUtil.toBlockPosition(event.getTo()));
++                    yaw = event.getTo().getYaw();
++                    pitch = event.getTo().getPitch();
++                    velocity = org.bukkit.craftbukkit.util.CraftVector.toNMS(event.getAfter());
++                }
++                // Paper end
+                 // CraftBukkit start
+                 worldserver = shapedetectorshape.world;
+                 this.unRide();
+@@ -0,0 +0,0 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
+ 
+                 if (entity != null) {
+                     entity.restoreFrom(this);
+-                    entity.moveTo(shapedetectorshape.pos.x, shapedetectorshape.pos.y, shapedetectorshape.pos.z, shapedetectorshape.yRot, entity.getXRot());
+-                    entity.setDeltaMovement(shapedetectorshape.speed);
++                    entity.moveTo(position.x, position.y, position.z, yaw, pitch); // Paper - respect EntityPortalExitEvent values
++                    entity.setDeltaMovement(velocity); // Paper - respect EntityPortalExitEvent values
+                     worldserver.addDuringTeleport(entity);
+                     if (worldserver.getTypeKey() == DimensionType.END_LOCATION) { // CraftBukkit
+                         ServerLevel.makeObsidianPlatform(worldserver, this); // CraftBukkit