PistonRetractsScriptEvent.java

package com.denizenscript.denizen.events.block;

import com.denizenscript.denizen.objects.LocationTag;
import com.denizenscript.denizen.objects.MaterialTag;
import com.denizenscript.denizen.events.BukkitScriptEvent;
import com.denizenscript.denizencore.objects.core.ElementTag;
import com.denizenscript.denizencore.objects.core.ListTag;
import com.denizenscript.denizencore.objects.ObjectTag;
import org.bukkit.block.Block;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockPistonRetractEvent;

public class PistonRetractsScriptEvent extends BukkitScriptEvent implements Listener {

    // <--[event]
    // @Events
    // piston retracts
    // <block> retracts
    //
    // @Regex ^on [^\s]+ retracts$
    //
    // @Group Block
    //
    // @Location true
    //
    // @Cancellable true
    //
    // @Triggers when a piston retracts.
    //
    // @Context
    // <context.location> returns the LocationTag of the piston.
    // <context.retract_location> returns the new LocationTag of the block that will be moved by the piston if it is sticky.
    // <context.blocks> returns a ListTag of all block locations about to be moved.
    // <context.material> returns the MaterialTag of the piston.
    // <context.sticky> returns an ElementTag of whether the piston is sticky.
    // <context.relative> returns a LocationTag of the block in front of the piston.
    //
    // -->

    public PistonRetractsScriptEvent() {
        instance = this;
    }

    public static PistonRetractsScriptEvent instance;
    public LocationTag location;
    public MaterialTag material;
    public BlockPistonRetractEvent event;

    @Override
    public boolean couldMatch(ScriptPath path) {
        if (!path.eventArgLowerAt(1).equals("retracts")) {
            return false;
        }
        if (!path.eventArgLowerAt(0).equals("piston") && !couldMatchBlock(path.eventArgLowerAt(0))) {
            return false;
        }
        return true;

    }

    @Override
    public boolean matches(ScriptPath path) {
        String mat = path.eventArgLowerAt(0);
        if (!runInCheck(path, location)) {
            return false;
        }
        if (!mat.equals("piston") && !tryMaterial(material, mat)) {
            return false;
        }
        return super.matches(path);
    }

    @Override
    public String getName() {
        return "PistonRetracts";
    }

    @Override
    public ObjectTag getContext(String name) {
        if (name.equals("location")) {
            return location;
        }
        else if (name.equals("material")) {
            return material;
        }
        else if (name.equals("sticky")) {
            return new ElementTag(event.isSticky());
        }
        else if (name.equals("relative")) {
            return new LocationTag(event.getBlock().getRelative(event.getDirection().getOppositeFace()).getLocation());
        }
        else if (name.equals("blocks")) {
            ListTag blocks = new ListTag();
            for (Block block : event.getBlocks()) {
                blocks.addObject(new LocationTag(block.getLocation()));
            }
            return blocks;
        }
        else if (name.equals("retract_location")) {
            return new LocationTag(event.getBlock().getRelative(event.getDirection().getOppositeFace(), 2).getLocation());
        }
        return super.getContext(name);
    }

    @EventHandler
    public void onPistonRetracts(BlockPistonRetractEvent event) {
        location = new LocationTag(event.getBlock().getLocation());
        material = new MaterialTag(event.getBlock());
        this.event = event;
        fire(event);
    }
}