From 814c742554e40554a30cee1915b42457081000c6 Mon Sep 17 00:00:00 2001
From: kaenganxt <kaenganxt@mc-anura.de>
Date: Fri, 20 Jul 2018 16:04:37 +1000
Subject: SPIGOT-840, SPIGOT-2522: [Draft] Add EntityPotionEffectChangeEvent

Discussion ongoing in PR #449
---
 .../craftbukkit/entity/CraftLivingEntity.java      |  5 ++--
 .../craftbukkit/event/CraftEventFactory.java       | 35 ++++++++++++++++++++++
 2 files changed, 38 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
index 382b8028..13100e5d 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -68,6 +68,7 @@ import org.bukkit.entity.ThrownPotion;
 import org.bukkit.entity.TippedArrow;
 import org.bukkit.entity.Trident;
 import org.bukkit.entity.WitherSkull;
+import org.bukkit.event.entity.EntityPotionEffectEvent;
 import org.bukkit.event.player.PlayerTeleportEvent;
 import org.bukkit.inventory.EntityEquipment;
 import org.bukkit.inventory.ItemStack;
@@ -262,7 +263,7 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
             }
             removePotionEffect(effect.getType());
         }
-        getHandle().addEffect(new MobEffect(MobEffectList.fromId(effect.getType().getId()), effect.getDuration(), effect.getAmplifier(), effect.isAmbient(), effect.hasParticles()));
+        getHandle().addEffect(new MobEffect(MobEffectList.fromId(effect.getType().getId()), effect.getDuration(), effect.getAmplifier(), effect.isAmbient(), effect.hasParticles()), EntityPotionEffectEvent.Cause.PLUGIN);
         return true;
     }
 
@@ -285,7 +286,7 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
     }
 
     public void removePotionEffect(PotionEffectType type) {
-        getHandle().removeEffect(MobEffectList.fromId(type.getId()));
+        getHandle().removeEffect(MobEffectList.fromId(type.getId()), EntityPotionEffectEvent.Cause.PLUGIN);
     }
 
     public Collection<PotionEffect> getActivePotionEffects() {
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 5793bdf4..72b5dfd7 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -31,6 +31,7 @@ import org.bukkit.craftbukkit.entity.CraftPlayer;
 import org.bukkit.craftbukkit.inventory.CraftInventoryCrafting;
 import org.bukkit.craftbukkit.inventory.CraftItemStack;
 import org.bukkit.craftbukkit.inventory.CraftMetaBook;
+import org.bukkit.craftbukkit.potion.CraftPotionUtil;
 import org.bukkit.craftbukkit.util.CraftDamageSource;
 import org.bukkit.craftbukkit.util.CraftMagicNumbers;
 import org.bukkit.entity.AreaEffectCloud;
@@ -67,6 +68,7 @@ import org.bukkit.inventory.meta.BookMeta;
 import org.bukkit.entity.AbstractHorse;
 import org.bukkit.entity.Vehicle;
 import org.bukkit.event.vehicle.VehicleCreateEvent;
+import org.bukkit.potion.PotionEffect;
 
 public class CraftEventFactory {
     public static final DamageSource MELTING = CraftDamageSource.copyOf(DamageSource.BURN);
@@ -1054,6 +1056,39 @@ public class CraftEventFactory {
         return handleBlockFormEvent(world, pos, block, 3);
     }
 
+    public static EntityPotionEffectEvent callEntityPotionEffectChangeEvent(EntityLiving entity, @Nullable MobEffect oldEffect, @Nullable MobEffect newEffect, EntityPotionEffectEvent.Cause cause) {
+        return callEntityPotionEffectChangeEvent(entity, oldEffect, newEffect, cause, true);
+    }
+
+    public static EntityPotionEffectEvent callEntityPotionEffectChangeEvent(EntityLiving entity, @Nullable MobEffect oldEffect, @Nullable MobEffect newEffect, EntityPotionEffectEvent.Cause cause, EntityPotionEffectEvent.Action action) {
+        return callEntityPotionEffectChangeEvent(entity, oldEffect, newEffect, cause, action, true);
+    }
+
+    public static EntityPotionEffectEvent callEntityPotionEffectChangeEvent(EntityLiving entity, @Nullable MobEffect oldEffect, @Nullable MobEffect newEffect, EntityPotionEffectEvent.Cause cause, boolean willOverride) {
+        EntityPotionEffectEvent.Action action = EntityPotionEffectEvent.Action.CHANGED;
+        if (oldEffect == null) {
+            action = EntityPotionEffectEvent.Action.ADDED;
+        } else if (newEffect == null) {
+            action = EntityPotionEffectEvent.Action.REMOVED;
+        }
+
+        return callEntityPotionEffectChangeEvent(entity, oldEffect, newEffect, cause, action, willOverride);
+    }
+
+    public static EntityPotionEffectEvent callEntityPotionEffectChangeEvent(EntityLiving entity, @Nullable MobEffect oldEffect, @Nullable MobEffect newEffect, EntityPotionEffectEvent.Cause cause, EntityPotionEffectEvent.Action action, boolean willOverride) {
+        PotionEffect bukkitOldEffect = (oldEffect == null) ? null : CraftPotionUtil.toBukkit(oldEffect);
+        PotionEffect bukkitNewEffect = (newEffect == null) ? null : CraftPotionUtil.toBukkit(newEffect);
+
+        if (bukkitOldEffect == null && bukkitNewEffect == null) {
+            throw new IllegalStateException("Old and new potion effect are both null");
+        }
+
+        EntityPotionEffectEvent event = new EntityPotionEffectEvent((LivingEntity) entity.getBukkitEntity(), bukkitOldEffect, bukkitNewEffect, cause, action, willOverride);
+        Bukkit.getPluginManager().callEvent(event);
+
+        return event;
+    }
+
     public static boolean handleBlockFormEvent(World world, BlockPosition pos, IBlockData block, @Nullable Entity entity) {
         return handleBlockFormEvent(world, pos, block, 3, entity);
     }
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