Paper/patches/server/0190-EndermanAttackPlayerEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 1 May 2018 20:18:54 -0400
Subject: [PATCH] EndermanAttackPlayerEvent

Allow control over whether or not an enderman aggros a player.

This allows you to override/extend the pumpkin/stare logic.

diff --git a/src/main/java/net/minecraft/world/entity/monster/EnderMan.java b/src/main/java/net/minecraft/world/entity/monster/EnderMan.java
index 51e9988685b1a9a3d4d2effec63560b0ae9e8d3a..70888dd25b6a1d1ab7702d73a64a47eebafe76fe 100644
--- a/src/main/java/net/minecraft/world/entity/monster/EnderMan.java
+++ b/src/main/java/net/minecraft/world/entity/monster/EnderMan.java
@@ -233,7 +233,15 @@ public class EnderMan extends Monster implements NeutralMob {
         this.readPersistentAngerSaveData(this.level(), nbt);
     }
 
-    boolean isLookingAtMe(Player player) {
+    // Paper start - EndermanAttackPlayerEvent
+    private boolean isLookingAtMe(Player player) {
+        boolean shouldAttack = isLookingAtMe_check(player);
+        com.destroystokyo.paper.event.entity.EndermanAttackPlayerEvent event = new com.destroystokyo.paper.event.entity.EndermanAttackPlayerEvent((org.bukkit.entity.Enderman) getBukkitEntity(), (org.bukkit.entity.Player) player.getBukkitEntity());
+        event.setCancelled(!shouldAttack);
+        return event.callEvent();
+    }
+    private boolean isLookingAtMe_check(Player player) {
+        // Paper end - EndermanAttackPlayerEvent
         ItemStack itemstack = (ItemStack) player.getInventory().armor.get(3);
 
         if (itemstack.is(Blocks.CARVED_PUMPKIN.asItem())) {