From 4f9d4a0413c84f421d0d2db929db36c3446f0fb8 Mon Sep 17 00:00:00 2001
From: Alex 'mcmonkey' Goodwin <agoodwin@freneticllc.com>
Date: Sun, 24 Nov 2019 03:13:09 -0800
Subject: [PATCH] add projectile collides event, fixes #2075

---
 .../denizen/paper/PaperModule.java            |  1 +
 .../events/ProjectileCollideScriptEvent.java  | 84 +++++++++++++++++++
 .../implementation/BukkitScriptEntryData.java | 18 ++++
 3 files changed, 103 insertions(+)
 create mode 100644 paper/src/main/java/com/denizenscript/denizen/paper/events/ProjectileCollideScriptEvent.java

diff --git a/paper/src/main/java/com/denizenscript/denizen/paper/PaperModule.java b/paper/src/main/java/com/denizenscript/denizen/paper/PaperModule.java
index 9b95a61844..3ab613bdfd 100644
--- a/paper/src/main/java/com/denizenscript/denizen/paper/PaperModule.java
+++ b/paper/src/main/java/com/denizenscript/denizen/paper/PaperModule.java
@@ -12,6 +12,7 @@ public static void init() {
         ScriptEvent.registerScriptEvent(new PlayerJumpsPaperScriptEventImpl());
         ScriptEvent.registerScriptEvent(new PlayerSpectatesEntityScriptEvent());
         ScriptEvent.registerScriptEvent(new PlayerStopsSpectatingScriptEvent());
+        ScriptEvent.registerScriptEvent(new ProjectileCollideScriptEvent());
         ScriptEvent.registerScriptEvent(new TNTPrimesScriptEvent());
     }
 }
diff --git a/paper/src/main/java/com/denizenscript/denizen/paper/events/ProjectileCollideScriptEvent.java b/paper/src/main/java/com/denizenscript/denizen/paper/events/ProjectileCollideScriptEvent.java
new file mode 100644
index 0000000000..38f8e04c93
--- /dev/null
+++ b/paper/src/main/java/com/denizenscript/denizen/paper/events/ProjectileCollideScriptEvent.java
@@ -0,0 +1,84 @@
+package com.denizenscript.denizen.paper.events;
+
+import com.denizenscript.denizen.events.BukkitScriptEvent;
+import com.denizenscript.denizen.objects.EntityTag;
+import com.denizenscript.denizen.utilities.implementation.BukkitScriptEntryData;
+import com.denizenscript.denizencore.objects.ObjectTag;
+import com.denizenscript.denizencore.scripts.ScriptEntryData;
+import com.destroystokyo.paper.event.entity.ProjectileCollideEvent;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+
+public class ProjectileCollideScriptEvent extends BukkitScriptEvent implements Listener {
+
+    // <--[event]
+    // @Events
+    // projectile collides with entity
+    // <projectile> collides with <entity>
+    //
+    // @Regex ^on [^\s]+ collides with [^\s]+$
+    //
+    // @Switch in:<area> to only process the event if it occurred within a specified area.
+    //
+    // @Plugin Paper
+    //
+    // @Cancellable true
+    //
+    // @Triggers when a projectile entity collides with an entity (before any damage calculations are done).
+    //
+    // @Context
+    // <context.projectile> returns the projectile that is colliding.
+    // <context.entity> returns the entity that was collided with.
+    //
+    // @Player When the entity collided with is a player.
+    // @NPC When the entity collided with is a NPC.
+    //
+    // -->
+
+    public ProjectileCollideScriptEvent() {
+        instance = this;
+    }
+
+    public static ProjectileCollideScriptEvent instance;
+    public ProjectileCollideEvent event;
+
+    @Override
+    public boolean couldMatch(ScriptPath path) {
+        return path.eventArgLowerAt(1).equals("collides") && path.eventArgLowerAt(2).equals("with");
+    }
+
+    @Override
+    public boolean matches(ScriptPath path) {
+        if (!runInCheck(path, event.getEntity().getLocation())) {
+            return false;
+        }
+        return super.matches(path);
+    }
+
+    @Override
+    public String getName() {
+        return "ProjectileCollides";
+    }
+
+    @Override
+    public ScriptEntryData getScriptEntryData() {
+        return new BukkitScriptEntryData(event.getCollidedWith());
+    }
+
+    @Override
+    public ObjectTag getContext(String name) {
+        if (name.equals("entity")) {
+            return new EntityTag(event.getCollidedWith());
+        }
+        else if (name.equals("projectile")) {
+            return new EntityTag(event.getEntity());
+        }
+        return super.getContext(name);
+    }
+
+    @EventHandler
+    public void projectileCollideEvent(ProjectileCollideEvent event) {
+        this.event = event;
+        fire(event);
+    }
+}
diff --git a/plugin/src/main/java/com/denizenscript/denizen/utilities/implementation/BukkitScriptEntryData.java b/plugin/src/main/java/com/denizenscript/denizen/utilities/implementation/BukkitScriptEntryData.java
index f9e5593fd6..1f2bd361e1 100644
--- a/plugin/src/main/java/com/denizenscript/denizen/utilities/implementation/BukkitScriptEntryData.java
+++ b/plugin/src/main/java/com/denizenscript/denizen/utilities/implementation/BukkitScriptEntryData.java
@@ -1,10 +1,12 @@
 package com.denizenscript.denizen.utilities.implementation;
 
+import com.denizenscript.denizen.objects.EntityTag;
 import com.denizenscript.denizen.objects.NPCTag;
 import com.denizenscript.denizen.objects.PlayerTag;
 import com.denizenscript.denizen.tags.BukkitTagContext;
 import com.denizenscript.denizencore.scripts.ScriptEntryData;
 import com.denizenscript.denizencore.tags.TagContext;
+import org.bukkit.entity.Entity;
 
 public class BukkitScriptEntryData extends ScriptEntryData {
     private PlayerTag player;
@@ -15,6 +17,22 @@ public BukkitScriptEntryData(PlayerTag player, NPCTag npc) {
         this.npc = npc;
     }
 
+    public BukkitScriptEntryData(EntityTag entity) {
+        if (entity == null) {
+            return;
+        }
+        if (entity.isCitizensNPC()) {
+            this.npc = entity.getDenizenNPC();
+        }
+        if (entity.isPlayer()) {
+            this.player = entity.getDenizenPlayer();
+        }
+    }
+
+    public BukkitScriptEntryData(Entity entity) {
+        this(entity == null ? null : new EntityTag(entity));
+    }
+
     public PlayerTag getPlayer() {
         return player;
     }