Paper/patches/server/0108-Add-EntityZapEvent.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: AlphaBlend <whizkid3000@hotmail.com>
Date: Sun, 16 Oct 2016 23:19:30 -0700
Subject: [PATCH] Add EntityZapEvent


diff --git a/src/main/java/net/minecraft/world/entity/ConversionParams.java b/src/main/java/net/minecraft/world/entity/ConversionParams.java
index 3300104ad3e1f1e39cbe928ec6ad635e6ab76327..c18bc54721e90ed67312cd8baf52ccc8fe04d4cb 100644
--- a/src/main/java/net/minecraft/world/entity/ConversionParams.java
+++ b/src/main/java/net/minecraft/world/entity/ConversionParams.java
@@ -12,4 +12,11 @@ public record ConversionParams(ConversionType type, boolean keepEquipment, boole
     public interface AfterConversion<T extends Mob> {
         void finalizeConversion(T convertedEntity);
     }
+
+    // Paper start - entity zap event - allow conversion to be cancelled during finalization
+    @FunctionalInterface
+    public interface CancellingAfterConversion<T extends Mob> {
+        boolean finalizeConversionOrCancel(final T convertedEntity);
+    }
+    // Paper start - entity zap event - allow conversion to be cancelled during finalization
 }
diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
index 9655466953cf850b82716246821a3ebb968a5478..03d289abc30927793aa00f6758ed9db6fb765999 100644
--- a/src/main/java/net/minecraft/world/entity/Mob.java
+++ b/src/main/java/net/minecraft/world/entity/Mob.java
@@ -1498,6 +1498,12 @@ public abstract class Mob extends LivingEntity implements EquipmentUser, Leashab
 
     @Nullable
     public <T extends Mob> T convertTo(EntityType<T> entitytypes, ConversionParams conversionparams, EntitySpawnReason entityspawnreason, ConversionParams.AfterConversion<T> conversionparams_a, EntityTransformEvent.TransformReason transformReason, CreatureSpawnEvent.SpawnReason spawnReason) {
+    // Paper start - entity zap event - allow cancellation of conversion post creation
+        return this.convertTo(entitytypes, conversionparams, entityspawnreason, e -> { conversionparams_a.finalizeConversion(e); return true; }, transformReason, spawnReason);
+    }
+    @Nullable
+    public <T extends Mob> T convertTo(EntityType<T> entitytypes, ConversionParams conversionparams, EntitySpawnReason entityspawnreason, ConversionParams.CancellingAfterConversion<T> conversionparams_a, EntityTransformEvent.TransformReason transformReason, CreatureSpawnEvent.SpawnReason spawnReason) {
+    // Paper end - entity zap event - allow cancellation of conversion post creation
         // CraftBukkit end
         if (this.isRemoved()) {
             return null;
@@ -1508,7 +1514,7 @@ public abstract class Mob extends LivingEntity implements EquipmentUser, Leashab
                 return null;
             } else {
                 conversionparams.type().convert(this, t0, conversionparams);
-                conversionparams_a.finalizeConversion(t0);
+                if (!conversionparams_a.finalizeConversionOrCancel(t0)) return null; // Paper - entity zap event - return null if conversion was cancelled
                 Level world = this.level();
 
                 // CraftBukkit start
@@ -1544,6 +1550,11 @@ public abstract class Mob extends LivingEntity implements EquipmentUser, Leashab
 
     @Nullable
     public <T extends Mob> T convertTo(EntityType<T> entitytypes, ConversionParams conversionparams, ConversionParams.AfterConversion<T> conversionparams_a, EntityTransformEvent.TransformReason transformReason, CreatureSpawnEvent.SpawnReason spawnReason) {
+    // Paper start - entity zap event - allow cancellation of conversion post creation
+        return this.convertTo(entitytypes, conversionparams, e -> { conversionparams_a.finalizeConversion(e); return true; }, transformReason, spawnReason);
+    }
+    public <T extends Mob> T convertTo(EntityType<T> entitytypes, ConversionParams conversionparams, ConversionParams.CancellingAfterConversion<T> conversionparams_a, EntityTransformEvent.TransformReason transformReason, CreatureSpawnEvent.SpawnReason spawnReason) {
+    // Paper start - entity zap event - allow cancellation of conversion post creation
         return this.convertTo(entitytypes, conversionparams, EntitySpawnReason.CONVERSION, conversionparams_a, transformReason, spawnReason);
         // CraftBukkit end
     }
diff --git a/src/main/java/net/minecraft/world/entity/npc/Villager.java b/src/main/java/net/minecraft/world/entity/npc/Villager.java
index e52487a3537db6c7d6845f972355f8f437ea9156..624f06d630b55cdcaa97cb66736b69c7ad45dd83 100644
--- a/src/main/java/net/minecraft/world/entity/npc/Villager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java
@@ -834,11 +834,18 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
     @Override
     public void thunderHit(ServerLevel world, LightningBolt lightning) {
         if (world.getDifficulty() != Difficulty.PEACEFUL) {
-            Villager.LOGGER.info("Villager {} was struck by lightning {}.", this, lightning);
+            // Paper - Add EntityZapEvent; move log down, event can cancel
             Witch entitywitch = (Witch) this.convertTo(EntityType.WITCH, ConversionParams.single(this, false, false), (entitywitch1) -> {
+               // Paper start - Add EntityZapEvent
+               if (org.bukkit.craftbukkit.event.CraftEventFactory.callEntityZapEvent(this, lightning, entitywitch1).isCancelled()) {
+                   return false;
+               }
+               if (org.spigotmc.SpigotConfig.logVillagerDeaths) Villager.LOGGER.info("Villager {} was struck by lightning {}.", this, lightning); // Move down
+               // Paper end - Add EntityZapEvent
                 entitywitch1.finalizeSpawn(world, world.getCurrentDifficultyAt(entitywitch1.blockPosition()), EntitySpawnReason.CONVERSION, (SpawnGroupData) null);
                 entitywitch1.setPersistenceRequired();
                 this.releaseAllPois();
+                return true; // Paper start - Add EntityZapEvent
             }, EntityTransformEvent.TransformReason.LIGHTNING, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.LIGHTNING); // CraftBukkit
 
             if (entitywitch == null) {
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 9100ea65e85a0e55cad736634fa63815366334a8..40c298cf4444e7f458cb99b81d64ee6d58a2f128 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -1215,6 +1215,14 @@ public class CraftEventFactory {
         return !event.isCancelled();
     }
 
+    // Paper start
+    public static com.destroystokyo.paper.event.entity.EntityZapEvent callEntityZapEvent(Entity entity, Entity lightning, Entity changedEntity) {
+        com.destroystokyo.paper.event.entity.EntityZapEvent event = new com.destroystokyo.paper.event.entity.EntityZapEvent(entity.getBukkitEntity(), (LightningStrike) lightning.getBukkitEntity(), changedEntity.getBukkitEntity());
+        entity.getBukkitEntity().getServer().getPluginManager().callEvent(event);
+        return event;
+    }
+    // Paper end
+
     public static boolean callEntityChangeBlockEvent(Entity entity, BlockPos position, net.minecraft.world.level.block.state.BlockState newBlock) {
         return CraftEventFactory.callEntityChangeBlockEvent(entity, position, newBlock, false);
     }