Paper/Spigot-Server-Patches/0131-Add-ProjectileCollideEvent.patch

From ffdf77e2218dabe4c5eb150a763d49099e51ffb7 Mon Sep 17 00:00:00 2001
From: Techcable <Techcable@outlook.com>
Date: Fri, 16 Dec 2016 21:25:39 -0600
Subject: [PATCH] Add ProjectileCollideEvent


diff --git a/src/main/java/net/minecraft/server/EntityArrow.java b/src/main/java/net/minecraft/server/EntityArrow.java
index 531bb7f663..bb3ee4320d 100644
--- a/src/main/java/net/minecraft/server/EntityArrow.java
+++ b/src/main/java/net/minecraft/server/EntityArrow.java
@@ -184,6 +184,16 @@ public abstract class EntityArrow extends Entity implements IProjectile {
                     }
                 }
 
+                // Paper start - Call ProjectileCollideEvent
+                // TODO: flag - noclip - call cancelled?
+                if (object instanceof MovingObjectPositionEntity) {
+                    com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callProjectileCollideEvent(this, (MovingObjectPositionEntity)object);
+                    if (event.isCancelled()) {
+                        object = null;
+                    }
+                }
+                // Paper end
+
                 if (object != null && !flag) {
                     this.a((MovingObjectPosition) object);
                     this.impulse = true;
diff --git a/src/main/java/net/minecraft/server/EntityFireball.java b/src/main/java/net/minecraft/server/EntityFireball.java
index 739e48ec7c..192ee928fa 100644
--- a/src/main/java/net/minecraft/server/EntityFireball.java
+++ b/src/main/java/net/minecraft/server/EntityFireball.java
@@ -67,7 +67,16 @@ public abstract class EntityFireball extends Entity {
             ++this.g;
             MovingObjectPosition movingobjectposition = ProjectileHelper.a(this, true, this.g >= 25, this.shooter, RayTrace.BlockCollisionOption.COLLIDER);
 
-            if (movingobjectposition.getType() != MovingObjectPosition.EnumMovingObjectType.MISS) {
+            // Paper start - Call ProjectileCollideEvent
+            if (movingobjectposition instanceof MovingObjectPositionEntity) {
+                com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = CraftEventFactory.callProjectileCollideEvent(this, (MovingObjectPositionEntity)movingobjectposition);
+                if (event.isCancelled()) {
+                    movingobjectposition = null;
+                }
+            }
+            // Paper end
+
+            if (movingobjectposition != null && movingobjectposition.getType() != MovingObjectPosition.EnumMovingObjectType.MISS) { // Paper - add null check in case cancelled
                 this.a(movingobjectposition);
 
                 // CraftBukkit start - Fire ProjectileHitEvent
diff --git a/src/main/java/net/minecraft/server/EntityFishingHook.java b/src/main/java/net/minecraft/server/EntityFishingHook.java
index 15a686cb29..78527f3509 100644
--- a/src/main/java/net/minecraft/server/EntityFishingHook.java
+++ b/src/main/java/net/minecraft/server/EntityFishingHook.java
@@ -217,7 +217,16 @@ public class EntityFishingHook extends Entity {
             return !entity.t() && (entity.isInteractable() || entity instanceof EntityItem) && (entity != this.owner || this.g >= 5);
         }, RayTrace.BlockCollisionOption.COLLIDER, true);
 
-        if (movingobjectposition.getType() != MovingObjectPosition.EnumMovingObjectType.MISS) {
+        // Paper start - Call ProjectileCollideEvent
+        if (movingobjectposition instanceof MovingObjectPositionEntity) {
+            com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callProjectileCollideEvent(this, (MovingObjectPositionEntity)movingobjectposition);
+            if (event.isCancelled()) {
+                movingobjectposition = null;
+            }
+        }
+        // Paper end
+
+        if (movingobjectposition != null && movingobjectposition.getType() != MovingObjectPosition.EnumMovingObjectType.MISS) { // Paper - add null check in case cancelled
             org.bukkit.craftbukkit.event.CraftEventFactory.callProjectileHitEvent(this, movingobjectposition); // Craftbukkit - Call event
             if (movingobjectposition.getType() == MovingObjectPosition.EnumMovingObjectType.ENTITY) {
                 this.hooked = ((MovingObjectPositionEntity) movingobjectposition).getEntity();
diff --git a/src/main/java/net/minecraft/server/EntityProjectile.java b/src/main/java/net/minecraft/server/EntityProjectile.java
index ac62f836d1..bb4679cf76 100644
--- a/src/main/java/net/minecraft/server/EntityProjectile.java
+++ b/src/main/java/net/minecraft/server/EntityProjectile.java
@@ -102,7 +102,16 @@ public abstract class EntityProjectile extends Entity implements IProjectile {
             this.as = null;
         }
 
-        if (movingobjectposition.getType() != MovingObjectPosition.EnumMovingObjectType.MISS) {
+        // Paper start - Call ProjectileCollideEvent
+        if (movingobjectposition instanceof MovingObjectPositionEntity) {
+            com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callProjectileCollideEvent(this, (MovingObjectPositionEntity)movingobjectposition);
+            if (event.isCancelled()) {
+                movingobjectposition = null;
+            }
+        }
+        // Paper end
+
+        if (movingobjectposition != null && movingobjectposition.getType() != MovingObjectPosition.EnumMovingObjectType.MISS) { // Paper - add null check in case cancelled
             if (movingobjectposition.getType() == MovingObjectPosition.EnumMovingObjectType.BLOCK && this.world.getType(((MovingObjectPositionBlock) movingobjectposition).getBlockPosition()).getBlock() == Blocks.NETHER_PORTAL) {
                 this.c(((MovingObjectPositionBlock) movingobjectposition).getBlockPosition());
             } else {
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 451d4f030c..3ad614b7de 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -1098,6 +1098,16 @@ public class CraftEventFactory {
         return CraftItemStack.asNMSCopy(bitem);
     }
 
+    // Paper start
+    public static com.destroystokyo.paper.event.entity.ProjectileCollideEvent callProjectileCollideEvent(Entity entity, MovingObjectPositionEntity position) {
+        Projectile projectile = (Projectile) entity.getBukkitEntity();
+        org.bukkit.entity.Entity collided = position.getEntity().getBukkitEntity();
+        com.destroystokyo.paper.event.entity.ProjectileCollideEvent event = new com.destroystokyo.paper.event.entity.ProjectileCollideEvent(projectile, collided);
+        Bukkit.getPluginManager().callEvent(event);
+        return event;
+    }
+    // Paper end
+
     public static ProjectileLaunchEvent callProjectileLaunchEvent(Entity entity) {
         Projectile bukkitEntity = (Projectile) entity.getBukkitEntity();
         ProjectileLaunchEvent event = new ProjectileLaunchEvent(bukkitEntity);
-- 
2.21.0