001/*
002 * This file is part of Baritone.
003 *
004 * Baritone is free software: you can redistribute it and/or modify
005 * it under the terms of the GNU Lesser General Public License as published by
006 * the Free Software Foundation, either version 3 of the License, or
007 * (at your option) any later version.
008 *
009 * Baritone is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
012 * GNU Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public License
015 * along with Baritone.  If not, see <https://www.gnu.org/licenses/>.
016 */
017
018package baritone.api.command.datatypes;
019
020import baritone.api.command.argument.IArgConsumer;
021import baritone.api.command.exception.CommandException;
022
023import java.util.regex.Matcher;
024import java.util.regex.Pattern;
025import java.util.stream.Stream;
026
027public enum RelativeCoordinate implements IDatatypePost<Double, Double> {
028    INSTANCE;
029    private static Pattern PATTERN = Pattern.compile("^(~?)([+-]?(?:\\d+(?:\\.\\d*)?|\\.\\d+)([k-k]?)|)$");
030
031    @Override
032    public Double apply(IDatatypeContext ctx, Double origin) throws CommandException {
033        if (origin == null) {
034            origin = 0.0D;
035        }
036
037        Matcher matcher = PATTERN.matcher(ctx.getConsumer().getString());
038        if (!matcher.matches()) {
039            throw new IllegalArgumentException("pattern doesn't match");
040        }
041
042        boolean isRelative = !matcher.group(1).isEmpty();
043
044        double offset = matcher.group(2).isEmpty() ? 0 : Double.parseDouble(matcher.group(2).replaceAll("k", ""));
045
046        if (matcher.group(2).contains("k")) {
047            offset *= 1000;
048        }
049
050        if (isRelative) {
051            return origin + offset;
052        }
053        return offset;
054    }
055
056    @Override
057    public Stream<String> tabComplete(IDatatypeContext ctx) throws CommandException {
058        final IArgConsumer consumer = ctx.getConsumer();
059        if (!consumer.has(2) && consumer.getString().matches("^(~|$)")) {
060            return Stream.of("~");
061        }
062        return Stream.empty();
063    }
064}