Adds the paper-only dragon egg forms event

paper/src/main/java/com/denizenscript/denizen/paper/PaperModule.java

@@ -35,6 +35,7 @@ public static void init() {
         }
         ScriptEvent.registerScriptEvent(BlockPreDispenseScriptEvent.class);
         ScriptEvent.registerScriptEvent(CreeperIgnitesScriptEvent.class);
+        ScriptEvent.registerScriptEvent(DragonEggFormScriptEvent.class);
         ScriptEvent.registerScriptEvent(EntityAddToWorldScriptEvent.class);
         ScriptEvent.registerScriptEvent(EntityKnocksbackEntityScriptEvent.class);
         ScriptEvent.registerScriptEvent(EntityLoadCrossbowScriptEvent.class);

paper/src/main/java/com/denizenscript/denizen/paper/events/DragonEggFormScriptEvent.java

@@ -0,0 +1,75 @@
+package com.denizenscript.denizen.paper.events;
+
+import com.denizenscript.denizen.events.BukkitScriptEvent;
+import com.denizenscript.denizen.objects.EntityTag;
+import com.denizenscript.denizen.objects.LocationTag;
+import com.denizenscript.denizencore.objects.ObjectTag;
+import com.denizenscript.denizencore.objects.core.ElementTag;
+import com.denizenscript.denizencore.objects.core.ListTag;
+import io.papermc.paper.event.block.DragonEggFormEvent;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+
+public class DragonEggFormScriptEvent extends BukkitScriptEvent implements Listener {
+
+    // <--[event]
+    // @Events
+    // dragon egg forms
+    //
+    // @Plugin Paper
+    //
+    // @Group Paper
+    //
+    // @Location true
+    //
+    // @Triggers when the ender dragon is defeated and the dragon egg forms.
+    //
+    // @Context
+    // <context.entity> returns the EntityTag of the ender dragon right before it's removed.
+    // <context.location> returns the LocationTag of the dragon egg.
+    // <context.end_portal_location> returns the LocationTag of the end portal.
+    // <context.previously_killed> returns an ElementTag(Boolean) of whether the dragon has been previously killed.
+    // <context.respawn_phase> returns an ElementTag of the respawn phase. Valid values can be found at <@link url https://jd.papermc.io/paper/1.21.3/org/bukkit/boss/DragonBattle.RespawnPhase.html>.
+    // <context.healing_crystals> returns a ListTag(EntityTag) of the healing end crystals.
+    // <context.respawn_crystals> returns a ListTag(EntityTag) of the respawn end crystals.
+    //
+    // -->
+
+    public DragonEggFormScriptEvent() {
+        registerCouldMatcher("dragon egg forms");
+    }
+
+    public LocationTag location;
+    public EntityTag entity;
+    public DragonEggFormEvent event;
+
+    @Override
+    public boolean matches(ScriptPath path) {
+        if (!runInCheck(path, location)) {
+            return false;
+        }
+        return super.matches(path);
+    }
+
+    @Override
+    public ObjectTag getContext(String name) {
+        return switch (name) {
+            case "entity" -> entity;
+            case "location" -> location;
+            case "end_portal_location" -> new LocationTag(event.getDragonBattle().getEndPortalLocation());
+            case "previously_killed" -> new ElementTag(event.getDragonBattle().hasBeenPreviouslyKilled());
+            case "respawn_phase" -> new ElementTag(event.getDragonBattle().getRespawnPhase().name());
+            case "healing_crystals" -> new ListTag(event.getDragonBattle().getHealingCrystals(), EntityTag::new);
+            case "respawn_crystals" -> new ListTag(event.getDragonBattle().getRespawnCrystals(), EntityTag::new);
+            default -> super.getContext(name);
+        };
+    }
+
+    @EventHandler
+    public void onDragonEggForms(DragonEggFormEvent event) {
+        location = new LocationTag(event.getBlock().getLocation());
+        entity = new EntityTag(event.getDragonBattle().getEnderDragon());
+        this.event = event;
+        fire(event);
+    }
+}