From fcf0bc255f96be29984c13473c0f0545db3f63d5 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 14 Jan 2018 17:31:37 -0500
Subject: [PATCH] PlayerNaturallySpawnCreaturesEvent

This event can be used for when you want to exclude a certain player
from triggering monster spawns on a server.

Also a highly more effecient way to blanket block spawns in a world

diff --git a/src/main/java/com/destroystokyo/paper/event/entity/PlayerNaturallySpawnCreaturesEvent.java b/src/main/java/com/destroystokyo/paper/event/entity/PlayerNaturallySpawnCreaturesEvent.java
new file mode 100644
index 000000000..112a0dbf5
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/event/entity/PlayerNaturallySpawnCreaturesEvent.java
@@ -0,0 +1,64 @@
+package com.destroystokyo.paper.event.entity;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Fired when the server is calculating what chunks to try to spawn monsters in every Monster Spawn Tick event
+ */
+public class PlayerNaturallySpawnCreaturesEvent extends PlayerEvent implements Cancellable {
+    private byte radius;
+
+    public PlayerNaturallySpawnCreaturesEvent(@NotNull Player player, byte radius) {
+        super(player);
+        this.radius = radius;
+    }
+
+    /**
+     * @return The radius of chunks around this player to be included in natural spawn selection
+     */
+    public byte getSpawnRadius() {
+        return radius;
+    }
+
+    /**
+     * @param radius The radius of chunks around this player to be included in natural spawn selection
+     */
+    public void setSpawnRadius(byte radius) {
+        this.radius = radius;
+    }
+
+    private static final HandlerList handlers = new HandlerList();
+
+    @NotNull
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    @NotNull
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    private boolean cancelled = false;
+
+    /**
+     * @return If this players chunks will be excluded from natural spawns
+     */
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    /**
+     * @param cancel true if you wish to cancel this event, and not include this players chunks for natural spawning
+     */
+    @Override
+    public void setCancelled(boolean cancel) {
+        cancelled = cancel;
+    }
+}
-- 
2.21.0