/*
* 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 org.bukkit.Location;
import org.bukkit.block.Block;
import org.bukkit.event.Event;
import org.eclipse.jdt.annotation.Nullable;
import ch.njol.skript.Skript;
import ch.njol.skript.SkriptConfig;
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.lang.Expression;
import ch.njol.skript.lang.ExpressionType;
import ch.njol.skript.lang.SkriptParser.ParseResult;
import ch.njol.skript.lang.util.SimpleExpression;
import ch.njol.skript.util.BlockLineIterator;
import ch.njol.skript.util.Direction;
import ch.njol.util.Kleenean;
import ch.njol.util.coll.iterator.ArrayIterator;
import ch.njol.util.coll.iterator.IteratorIterable;
/**
* @author Peter Güttinger
*/
@Name("Blocks")
@Description("Blocks relative to other blocks or between other blocks. Can be used to get blocks relative to other blocks or for looping.")
@Examples({"loop blocks above the player:",
"loop blocks between the block below the player and the targeted block:",
"set the blocks below the player, the victim and the targeted block to air"})
@Since("1.0")
public class ExprBlocks extends SimpleExpression<Block> {
static {
Skript.registerExpression(ExprBlocks.class, Block.class, ExpressionType.COMBINED,
"[the] blocks %direction% [%locations%]", // TODO doesn't loop all blocks?
"[the] blocks from %location% [on] %direction%",
"[the] blocks from %block% to %block%",
"[the] blocks between %block% and %block%");
}
@SuppressWarnings("null")
private Expression<?> from;
@Nullable
private Expression<Block> end;
@Nullable
private Expression<Direction> direction;
@SuppressWarnings({"unchecked", "null"})
@Override
public boolean init(final Expression<?>[] exprs, final int matchedPattern, final Kleenean isDelayed, final ParseResult parser) {
switch (matchedPattern) {
case 0:
direction = (Expression<Direction>) exprs[0];
from = exprs[1];
break;
case 1:
from = exprs[0];
direction = (Expression<Direction>) exprs[1];
break;
case 2:
case 3:
from = exprs[0];
end = (Expression<Block>) exprs[1];
break;
default:
assert false : matchedPattern;
return false;
}
return true;
}
@SuppressWarnings("null")
@Override
@Nullable
protected Block[] get(final Event e) {
final Expression<Direction> direction = this.direction;
if (direction != null && !from.isSingle()) {
final Location[] ls = (Location[]) from.getArray(e);
final Direction d = direction.getSingle(e);
if (ls.length == 0 || d == null)
return new Block[0];
final Block[] bs = new Block[ls.length];
for (int i = 0; i < ls.length; i++) {
bs[i] = d.getRelative(ls[i]).getBlock();
}
return bs;
}
final ArrayList<Block> r = new ArrayList<Block>();
final Iterator<Block> iter = iterator(e);
if (iter == null)
return new Block[0];
for (final Block b : new IteratorIterable<Block>(iter))
r.add(b);
return r.toArray(new Block[r.size()]);
}
@Override
@Nullable
public Iterator<Block> iterator(final Event e) {
try {
final Expression<Direction> direction = this.direction;
if (direction != null) {
if (!from.isSingle()) {
return new ArrayIterator<Block>(get(e));
}
final Object o = from.getSingle(e);
if (o == null)
return null;
final Location l = o instanceof Location ? (Location) o : ((Block) o).getLocation().add(0.5, 0.5, 0.5);
final Direction d = direction.getSingle(e);
if (d == null)
return null;
if (l.getBlock() == null)
return null;
return new BlockLineIterator(l, o != l ? d.getDirection((Block) o) : d.getDirection(l), SkriptConfig.maxTargetBlockDistance.value());
} else {
final Block b = (Block) from.getSingle(e);
if (b == null)
return null;
assert end != null;
final Block b2 = end.getSingle(e);
if (b2 == null || b2.getWorld() != b.getWorld())
return null;
return new BlockLineIterator(b, b2);
}
} catch (final IllegalStateException ex) {
if (ex.getMessage().equals("Start block missed in BlockIterator"))
return null;
throw ex;
}
}
@Override
public Class<? extends Block> getReturnType() {
return Block.class;
}
@Override
public boolean isSingle() {
return false;
}
@Override
public String toString(final @Nullable Event e, final boolean debug) {
final Expression<Block> end = this.end;
if (end != null) {
return "blocks from " + from.toString(e, debug) + " to " + end.toString(e, debug);
} else {
final Expression<Direction> direction = this.direction;
assert direction != null;
return "block" + (isSingle() ? "" : "s") + " " + direction.toString(e, debug) + " " + from.toString(e, debug);
}
}
}