/*
* This file is part of Skript.
*
* Skript is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Skript is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Skript. If not, see <http://www.gnu.org/licenses/>.
*
*
* Copyright 2011-2014 Peter Güttinger
*
*/
package ch.njol.skript.expressions;
import org.bukkit.entity.Creature;
import org.bukkit.entity.Entity;
import org.bukkit.entity.LivingEntity;
import org.bukkit.event.Event;
import org.bukkit.event.entity.EntityTargetEvent;
import org.eclipse.jdt.annotation.Nullable;
import ch.njol.skript.Skript;
import ch.njol.skript.classes.Changer.ChangeMode;
import ch.njol.skript.classes.Converter;
import ch.njol.skript.doc.Description;
import ch.njol.skript.doc.Examples;
import ch.njol.skript.doc.Name;
import ch.njol.skript.doc.Since;
import ch.njol.skript.effects.Delay;
import ch.njol.skript.entity.EntityData;
import ch.njol.skript.expressions.base.PropertyExpression;
import ch.njol.skript.lang.Expression;
import ch.njol.skript.lang.ExpressionType;
import ch.njol.skript.lang.SkriptParser.ParseResult;
import ch.njol.skript.registrations.Classes;
import ch.njol.skript.util.Utils;
import ch.njol.util.Kleenean;
import ch.njol.util.coll.CollectionUtils;
/**
* @author Peter Güttinger
*/
@Name("Target")
@Description("For players this is the entity at the crosshair, while for mobs and experience orbs it represents the entity they are attacking/following (if any).")
@Examples({"on entity target:",
" entity's target is a player",
" send \"You're being followed by an %entity%!\" to target of entity"})
@Since("")
public class ExprTarget extends PropertyExpression<LivingEntity, Entity> {
static {
Skript.registerExpression(ExprTarget.class, Entity.class, ExpressionType.PROPERTY,
"[the] target[[ed] %-*entitydata%] [of %livingentities%]",
"%livingentities%'[s] target[[ed] %-*entitydata%]");
}
@Nullable
EntityData<?> type;
@SuppressWarnings({"unchecked", "null"})
@Override
public boolean init(final Expression<?>[] exprs, final int matchedPattern, final Kleenean isDelayed, final ParseResult parser) {
type = exprs[matchedPattern] == null ? null : (EntityData<?>) exprs[matchedPattern].getSingle(null);
setExpr((Expression<? extends LivingEntity>) exprs[1 - matchedPattern]);
return true;
}
@Override
protected Entity[] get(final Event e, final LivingEntity[] source) {
return get(source, new Converter<LivingEntity, Entity>() {
@Override
@Nullable
public Entity convert(final LivingEntity en) {
if (getTime() >= 0 && e instanceof EntityTargetEvent && en.equals(((EntityTargetEvent) e).getEntity()) && !Delay.isDelayed(e)) {
final Entity t = ((EntityTargetEvent) e).getTarget();
if (t == null || type != null && !type.isInstance(t))
return null;
return t;
}
return Utils.getTarget(en, type);
}
});
}
@Override
public Class<? extends Entity> getReturnType() {
return type != null ? type.getType() : Entity.class;
}
@Override
public String toString(final @Nullable Event e, final boolean debug) {
if (e == null)
return "the target" + (type == null ? "" : "ed " + type) + (getExpr().isDefault() ? "" : " of " + getExpr().toString(e, debug));
return Classes.getDebugMessage(getAll(e));
}
@Override
public boolean setTime(final int time) {
return super.setTime(time, EntityTargetEvent.class, getExpr());
}
@SuppressWarnings("unchecked")
@Override
@Nullable
public Class<?>[] acceptChange(final ChangeMode mode) {
if (mode == ChangeMode.SET || mode == ChangeMode.DELETE)
return CollectionUtils.array(LivingEntity.class);
return super.acceptChange(mode);
}
@Override
public void change(final Event e, final @Nullable Object[] delta, final ChangeMode mode) {
if (mode == ChangeMode.SET || mode == ChangeMode.DELETE) {
final LivingEntity target = delta == null ? null : (LivingEntity) delta[0];
for (final LivingEntity entity : getExpr().getArray(e)) {
if (getTime() >= 0 && e instanceof EntityTargetEvent && entity.equals(((EntityTargetEvent) e).getEntity()) && !Delay.isDelayed(e)) {
((EntityTargetEvent) e).setTarget(target);
} else {
if (entity instanceof Creature)
((Creature) entity).setTarget(target);
}
}
} else {
super.change(e, delta, mode);
}
}
}