Add ElderGuardianAppearanceEvent (#5394)

Spigot-API-Patches/Add-ElderGuardianAppearanceEvent.patch

@@ -0,0 +1,81 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
+Date: Fri, 19 Mar 2021 23:39:21 -0400
+Subject: [PATCH] Add ElderGuardianAppearanceEvent
+
+
+diff --git a/src/main/java/io/papermc/paper/event/entity/ElderGuardianAppearanceEvent.java b/src/main/java/io/papermc/paper/event/entity/ElderGuardianAppearanceEvent.java
+new file mode 100644
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000
+--- /dev/null
++++ b/src/main/java/io/papermc/paper/event/entity/ElderGuardianAppearanceEvent.java
+@@ -0,0 +0,0 @@
++package io.papermc.paper.event.entity;
++
++import org.bukkit.entity.ElderGuardian;
++import org.bukkit.entity.Entity;
++import org.bukkit.entity.Player;
++import org.bukkit.event.Cancellable;
++import org.bukkit.event.HandlerList;
++import org.bukkit.event.entity.EntityEvent;
++import org.jetbrains.annotations.NotNull;
++
++import java.util.Collections;
++import java.util.List;
++
++/**
++ * Is called when an {@link org.bukkit.entity.ElderGuardian} appears in front of a {@link org.bukkit.entity.Player}.
++ */
++public class ElderGuardianAppearanceEvent extends EntityEvent implements Cancellable {
++
++    private static final HandlerList handlers = new HandlerList();
++
++    private boolean cancelled;
++    private final Player affectedPlayer;
++
++    public ElderGuardianAppearanceEvent(@NotNull Entity what, @NotNull Player affectedPlayer) {
++        super(what);
++        this.affectedPlayer = affectedPlayer;
++    }
++
++    /**
++     * Get the player affected by the guardian appearance.
++     *
++     * @return Player affected by the appearance
++     */
++    @NotNull
++    public Player getAffectedPlayer() {
++        return affectedPlayer;
++    }
++
++    /**
++     * The elder guardian playing the effect.
++     *
++     * @return The elder guardian
++     */
++    @NotNull
++    public ElderGuardian getEntity() {
++        return (ElderGuardian) entity;
++    }
++
++    @Override
++    public boolean isCancelled() {
++        return cancelled;
++    }
++
++    @Override
++    public void setCancelled(boolean cancel) {
++        this.cancelled = cancel;
++    }
++
++    @NotNull
++    @Override
++    public HandlerList getHandlers() {
++        return handlers;
++    }
++
++    @NotNull
++    public static HandlerList getHandlerList() {
++        return handlers;
++    }
++}

Spigot-Server-Patches/Add-ElderGuardianAppearanceEvent.patch

@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
+Date: Fri, 19 Mar 2021 23:39:09 -0400
+Subject: [PATCH] Add ElderGuardianAppearanceEvent
+
+
+diff --git a/src/main/java/net/minecraft/world/entity/monster/EntityGuardianElder.java b/src/main/java/net/minecraft/world/entity/monster/EntityGuardianElder.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/world/entity/monster/EntityGuardianElder.java
++++ b/src/main/java/net/minecraft/world/entity/monster/EntityGuardianElder.java
+@@ -0,0 +0,0 @@ public class EntityGuardianElder extends EntityGuardian {
+             while (iterator.hasNext()) {
+                 EntityPlayer entityplayer = (EntityPlayer) iterator.next();
+ 
++                if (new io.papermc.paper.event.entity.ElderGuardianAppearanceEvent(getBukkitEntity(), entityplayer.getBukkitEntity()).callEvent()) { // Paper - Add Guardian Appearance Event
+                 if (!entityplayer.hasEffect(mobeffectlist) || entityplayer.getEffect(mobeffectlist).getAmplifier() < 2 || entityplayer.getEffect(mobeffectlist).getDuration() < 1200) {
+                     entityplayer.playerConnection.sendPacket(new PacketPlayOutGameStateChange(PacketPlayOutGameStateChange.k, this.isSilent() ? 0.0F : 1.0F));
+                     entityplayer.addEffect(new MobEffect(mobeffectlist, 6000, 2), org.bukkit.event.entity.EntityPotionEffectEvent.Cause.ATTACK); // CraftBukkit
+                 }
++            } // Paper - Add Guardian Appearance Event
+             }
+         }
+