PlaceholderRandom.java

package me.fromgate.reactions.placeholders;

import me.fromgate.reactions.util.Util;
import org.bukkit.entity.Player;

import java.util.regex.Pattern;

@PlaceholderDefine(id = "Random", needPlayer = false, keys = {"RANDOM", "rnd"})
public class PlaceholderRandom extends Placeholder {

    private final static Pattern INT = Pattern.compile("\\d+");
    private final static Pattern INT_MIN_MAX = Pattern.compile("\\d+\\-\\d+");
    private final static Pattern WORD_LIST = Pattern.compile("[\\S,]*[\\S]");


    @Override
    public String processPlaceholder(Player player, String key, String param) {
        return random(param);
    }


    private String random(String rndStr) {
        if (INT.matcher(rndStr).matches()) {
            return Integer.toString(Util.getRandomInt(Integer.parseInt(rndStr)));
        }
        if (INT_MIN_MAX.matcher(rndStr).matches()) {
            return Integer.toString(Util.getMinMaxRandom(rndStr));
        }
        if (WORD_LIST.matcher(rndStr).matches()) {
            String[] ln = rndStr.split(",");
            if (ln.length == 0) return rndStr;
            return ln[Util.getRandomInt(ln.length)];
        }
        return rndStr;
    }
}