/*
* 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.Item;
import org.bukkit.event.Event;
import org.bukkit.inventory.ItemStack;
import org.eclipse.jdt.annotation.Nullable;
import ch.njol.skript.Skript;
import ch.njol.skript.aliases.ItemType;
import ch.njol.skript.classes.Changer.ChangeMode;
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.expressions.base.EventValueExpression;
import ch.njol.skript.lang.ExpressionType;
import ch.njol.skript.util.Slot;
/**
* @author Peter Güttinger
*/
@Name("Item")
@Description("The item involved in an event, e.g. in a drop, dispense, pickup or craft event.")
@Examples({"on dispense:",
" item is a clock",
" set the time to 6:00"/*," delete the item"*/})
@Since("")
public class ExprItem extends EventValueExpression<ItemStack> {
static {
Skript.registerExpression(ExprItem.class, ItemStack.class, ExpressionType.SIMPLE, "[the] item");
}
public ExprItem() {
super(ItemStack.class);
}
@Nullable
private EventValueExpression<Item> item;
@Nullable
private EventValueExpression<Slot> slot;
@Override
@Nullable
public Class<?>[] acceptChange(final ChangeMode mode) {
if (mode == ChangeMode.RESET)
return null;
item = new EventValueExpression<Item>(Item.class);
if (item.init())
return new Class[] {ItemType.class};
item = null;
slot = new EventValueExpression<Slot>(Slot.class);
if (slot.init())
return new Class[] {ItemType.class};
slot = null;
return null;
}
@Override
public void change(final Event e, final @Nullable Object[] delta, final ChangeMode mode) {
assert mode != ChangeMode.RESET;
final ItemType t = delta == null ? null : (ItemType) delta[0];
final Item i = item != null ? item.getSingle(e) : null;
final Slot s = slot != null ? slot.getSingle(e) : null;
if (i == null && s == null)
return;
ItemStack is = i != null ? i.getItemStack() : s != null ? s.getItem() : null;
switch (mode) {
case SET:
assert t != null;
is = t.getRandom();
break;
case ADD:
case REMOVE:
case REMOVE_ALL:
assert t != null;
if (t.isOfType(is)) {
if (mode == ChangeMode.ADD)
is = t.addTo(is);
else if (mode == ChangeMode.REMOVE)
is = t.removeFrom(is);
else
is = t.removeAll(is);
}
break;
case DELETE:
is = null;
if (i != null)
i.remove();
break;
case RESET:
assert false;
}
if (i != null)
i.setItemStack(is);
else if (s != null)
s.setItem(is);
else
assert false;
}
}