EntityExplodesScriptEvent.java

package com.denizenscript.denizen.events.entity;

import com.denizenscript.denizen.objects.EntityTag;
import com.denizenscript.denizen.objects.LocationTag;
import com.denizenscript.denizen.utilities.debugging.Debug;
import com.denizenscript.denizen.utilities.implementation.BukkitScriptEntryData;
import com.denizenscript.denizen.events.BukkitScriptEvent;
import com.denizenscript.denizencore.objects.core.ElementTag;
import com.denizenscript.denizencore.objects.ArgumentHelper;
import com.denizenscript.denizencore.objects.core.ListTag;
import com.denizenscript.denizencore.objects.ObjectTag;
import com.denizenscript.denizencore.scripts.ScriptEntryData;
import org.bukkit.block.Block;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityExplodeEvent;

public class EntityExplodesScriptEvent extends BukkitScriptEvent implements Listener {

    // <--[event]
    // @Events
    // <entity> explodes
    //
    // @Group Entity
    //
    // @Location true
    //
    // @Cancellable true
    //
    // @Triggers when an entity explodes (primed_tnt, creeper, etc).
    //
    // @Context
    // <context.blocks> returns a ListTag of blocks that the entity blew up.
    // <context.entity> returns the EntityTag that exploded.
    // <context.location> returns the LocationTag the entity blew up at.
    // <context.strength> returns an ElementTag(Decimal) of the strength of the explosion.
    //
    // @Determine
    // ListTag(LocationTag) to set a new lists of blocks that are to be affected by the explosion.
    // ElementTag(Decimal) to change the strength of the explosion.
    //
    // -->

    public EntityExplodesScriptEvent() {
        registerCouldMatcher("<entity> explodes");
    }

    public EntityTag entity;
    public LocationTag location;
    public EntityExplodeEvent event;

    @Override
    public boolean matches(ScriptPath path) {
        String target = path.eventArgLowerAt(0);
        if (!entity.tryAdvancedMatcher(target)) {
            return false;
        }
        if (!runInCheck(path, entity.getLocation())) {
            return false;
        }
        return super.matches(path);
    }

    @Override
    public boolean applyDetermination(ScriptPath path, ObjectTag determinationObj) {
        String determination = determinationObj.toString();
        if (ArgumentHelper.matchesDouble(determination)) {
            event.setYield(Float.parseFloat(determination));
            return true;
        }
        if (determination.contains(",") || determination.startsWith("li@")) { // Loose "contains any location-like value" check
            event.blockList().clear();
            for (String loc : ListTag.valueOf(determination, getTagContext(path))) {
                LocationTag location = LocationTag.valueOf(loc, getTagContext(path));
                if (location == null) {
                    Debug.echoError("Invalid location '" + loc + "' check [" + getName() + "]: '  for " + path.container.getName());
                }
                else {
                    event.blockList().add(location.getWorld().getBlockAt(location));
                }
            }
            return true;
        }
        return super.applyDetermination(path, determinationObj);
    }

    @Override
    public ScriptEntryData getScriptEntryData() {
        return new BukkitScriptEntryData(entity);
    }

    @Override
    public ObjectTag getContext(String name) {
        switch (name) {
            case "entity":
                return entity;
            case "location":
                return location;
            case "blocks":
                ListTag blocks = new ListTag();
                for (Block block : event.blockList()) {
                    blocks.addObject(new LocationTag(block.getLocation()));
                }
                return blocks;
            case "strength":
                return new ElementTag(event.getYield());
        }
        return super.getContext(name);
    }

    @EventHandler
    public void onEntityExplodes(EntityExplodeEvent event) {
        entity = new EntityTag(event.getEntity());
        location = new LocationTag(event.getLocation());
        this.event = event;
        fire(event);
    }
}