/*
* 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 java.util.ArrayList;
import java.util.Iterator;
import java.util.NoSuchElementException;
import org.bukkit.Material;
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.ItemData;
import ch.njol.skript.aliases.ItemType;
import ch.njol.skript.classes.Changer.ChangeMode;
import ch.njol.skript.classes.Changer.ChangerUtils;
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.PropertyExpression;
import ch.njol.skript.lang.Expression;
import ch.njol.skript.lang.ExpressionType;
import ch.njol.skript.lang.Literal;
import ch.njol.skript.lang.SkriptParser.ParseResult;
import ch.njol.util.Kleenean;
import ch.njol.util.coll.iterator.SingleItemIterator;
/**
* @author Peter Güttinger
*/
@Name("Id")
@Description("The id of a specific item. You usually don't need this expression as you can likely do everything with aliases.")
@Examples({"message \"the ID of %type of the clicked block% is %id of the clicked block%.\""})
@Since("1.0")
public class ExprIdOf extends PropertyExpression<ItemType, Integer> {
static {
Skript.registerExpression(ExprIdOf.class, Integer.class, ExpressionType.PROPERTY, "[the] id(1¦s|) of %itemtype%", "%itemtype%'[s] id(1¦s|)");
}
private boolean single = false;
@SuppressWarnings({"unchecked", "null"})
@Override
public boolean init(final Expression<?>[] vars, final int matchedPattern, final Kleenean isDelayed, final ParseResult parser) {
setExpr((Expression<ItemType>) vars[0]);
if (parser.mark != 1) {
single = true;
if (!getExpr().isSingle() || (getExpr() instanceof Literal && ((Literal<ItemType>) getExpr()).getSingle().getTypes().size() != 1)) {
Skript.warning("'" + getExpr() + "' has multiple ids");
single = false;
}
}
return true;
}
@Override
@Nullable
protected Integer[] get(final Event e, final ItemType[] source) {
if (single) {
final ItemType t = getExpr().getSingle(e);
if (t == null)
return new Integer[0];
return new Integer[] {t.getTypes().get(0).getId()};
}
final ArrayList<Integer> r = new ArrayList<Integer>();
for (final ItemType t : source) {
for (final ItemData d : t) {
r.add(Integer.valueOf(d.getId()));
}
}
return r.toArray(new Integer[r.size()]);
}
@Override
public String toString(final @Nullable Event e, final boolean debug) {
return "the id" + (single ? "" : "s") + " of " + getExpr().toString(e, debug);
}
boolean changeItemStack;
@Override
@Nullable
public Class<?>[] acceptChange(final ChangeMode mode) {
if (!getExpr().isSingle())
return null;
if (!ChangerUtils.acceptsChange(getExpr(), ChangeMode.SET, ItemStack.class, ItemType.class))
return null;
changeItemStack = ChangerUtils.acceptsChange(getExpr(), ChangeMode.SET, ItemStack.class);
switch (mode) {
case ADD:
case REMOVE:
case SET:
return new Class[] {Number.class};
case RESET:
case DELETE:
case REMOVE_ALL:
default:
return null;
}
}
@SuppressWarnings("deprecation")
@Override
public void change(final Event e, final @Nullable Object[] delta, final ChangeMode mode) {
assert delta != null;
final int i = ((Number) delta[0]).intValue();
final ItemType it = getExpr().getSingle(e);
if (it == null)
return;
final ItemStack is = it.getRandom();
if (is == null)
return;
int type = is.getTypeId();
switch (mode) {
case ADD:
type += i;
break;
case REMOVE:
type -= i;
break;
case SET:
type = i;
break;
case RESET:
case DELETE:
case REMOVE_ALL:
default:
assert false;
return;
}
final Material m = Material.getMaterial(type);
if (m != null) {
is.setType(m);
if (changeItemStack)
getExpr().change(e, new ItemStack[] {is}, ChangeMode.SET);
else
getExpr().change(e, new ItemType[] {new ItemType(is)}, ChangeMode.SET);
}
}
@SuppressWarnings("null")
@Override
@Nullable
public Iterator<Integer> iterator(final Event e) {
if (single) {
final ItemType t = getExpr().getSingle(e);
if (t == null)
return null;
if (t.numTypes() == 0)
return null;
return new SingleItemIterator<Integer>(t.getTypes().get(0).getId());
}
final Iterator<? extends ItemType> iter = getExpr().iterator(e);
if (iter == null || !iter.hasNext())
return null;
return new Iterator<Integer>() {
private Iterator<ItemData> current = iter.next().iterator();
@Override
public boolean hasNext() {
while (iter.hasNext() && !current.hasNext()) {
current = iter.next().iterator();
}
return current.hasNext();
}
@Override
public Integer next() {
if (!hasNext())
throw new NoSuchElementException();
return current.next().getId();
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
};
}
@Override
public Class<Integer> getReturnType() {
return Integer.class;
}
@Override
public boolean isLoopOf(final String s) {
return s.equalsIgnoreCase("id");
}
}