From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Brokkonaut <hannos17@gmx.de>
Date: Mon, 18 Jun 2018 15:40:39 +0200
Subject: [PATCH] Add EntityKnockbackByEntityEvent and
 EntityPushedByEntityAttackEvent

Co-authored-by: aerulion <aerulion@gmail.com>

diff --git a/src/main/java/com/destroystokyo/paper/event/entity/EntityKnockbackByEntityEvent.java b/src/main/java/com/destroystokyo/paper/event/entity/EntityKnockbackByEntityEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..42fdf7a5bfab99a61ff2fbf562f2872ac360bef2
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/entity/EntityKnockbackByEntityEvent.java
@@ -0,0 +1,46 @@
+package com.destroystokyo.paper.event.entity;
+
+import io.papermc.paper.event.entity.EntityPushedByEntityAttackEvent;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.util.Vector;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Fired when an Entity is knocked back by the hit of another Entity. The acceleration
+ * vector can be modified. If this event is cancelled, the entity is not knocked back.
+ *
+ */
+public class EntityKnockbackByEntityEvent extends EntityPushedByEntityAttackEvent {
+    private final float knockbackStrength;
+
+    public EntityKnockbackByEntityEvent(@NotNull LivingEntity entity, @NotNull Entity hitBy, float knockbackStrength, @NotNull Vector acceleration) {
+        super(entity, hitBy, acceleration);
+        this.knockbackStrength = knockbackStrength;
+    }
+
+    /**
+     * @return the entity which was knocked back
+     */
+    @NotNull
+    @Override
+    public LivingEntity getEntity() {
+        return (LivingEntity) super.getEntity();
+    }
+
+    /**
+     * @return the original knockback strength.
+     */
+    public float getKnockbackStrength() {
+        return knockbackStrength;
+    }
+
+    /**
+     * @return the Entity which hit
+     */
+    @NotNull
+    public Entity getHitBy() {
+        return super.getPushedBy();
+    }
+
+}
diff --git a/src/main/java/io/papermc/paper/event/entity/EntityPushedByEntityAttackEvent.java b/src/main/java/io/papermc/paper/event/entity/EntityPushedByEntityAttackEvent.java
new file mode 100644
index 0000000000000000000000000000000000000000..c15401cd206eb9e1a7a8b7154aba0247e2da1e19
--- /dev/null
+++ b/src/main/java/io/papermc/paper/event/entity/EntityPushedByEntityAttackEvent.java
@@ -0,0 +1,70 @@
+package io.papermc.paper.event.entity;
+
+import org.bukkit.entity.Entity;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.entity.EntityEvent;
+import org.bukkit.util.Vector;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Fired when an entity is pushed by another entity's attack. The acceleration vector can be
+ * modified. If this event is cancelled, the entity will not get pushed.
+ * <p>
+ * Note: Some entities might trigger this multiple times on the same entity
+ * as multiple acceleration calculations are done.
+ */
+public class EntityPushedByEntityAttackEvent extends EntityEvent implements Cancellable {
+
+    private static final HandlerList handlers = new HandlerList();
+
+    private final @NotNull Entity pushedBy;
+    private final @NotNull Vector acceleration;
+    private boolean cancelled = false;
+
+    public EntityPushedByEntityAttackEvent(@NotNull Entity entity, @NotNull Entity pushedBy, @NotNull Vector acceleration) {
+        super(entity);
+        this.pushedBy = pushedBy;
+        this.acceleration = acceleration;
+    }
+
+    @NotNull
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancel) {
+        cancelled = cancel;
+    }
+
+    /**
+     * Gets the entity which pushed the affected entity.
+     *
+     * @return the pushing entity
+     */
+    @NotNull
+    public Entity getPushedBy() {
+        return pushedBy;
+    }
+
+    /**
+     * Gets the acceleration that will be applied to the affected entity.
+     *
+     * @return the acceleration vector
+     */
+    @NotNull
+    public Vector getAcceleration() {
+        return acceleration;
+    }
+}