ChestShop-3/com/Acrobot/ChestShop/Utils/uSign.java

package com.Acrobot.ChestShop.Utils;

import com.Acrobot.ChestShop.Config.Config;
import com.Acrobot.ChestShop.Config.Property;
import org.bukkit.block.Block;
import org.bukkit.block.Sign;

import java.util.regex.Pattern;

/**
 * @author Acrobot
 */
public class uSign {
    private static final Pattern[] patterns = {
            Pattern.compile("^$|^\\w.+$"),
            Pattern.compile("[0-9]+"),
            Pattern.compile(".+"),
            Pattern.compile("[\\w :]+")
    };
    
    public static boolean isSign(Block block) {
        return block.getState() instanceof Sign;
    }

    public static boolean isAdminShop(String owner) {
        return owner.toLowerCase().replace(" ", "").equals(Config.getString(Property.ADMIN_SHOP_NAME).toLowerCase().replace(" ", ""));
    }

    public static boolean isValid(Sign sign) {
        return isValid(sign.getLines());
    }

    public static boolean isValid(String[] line) {
        try {
            return isValidPreparedSign(line) && (line[2].contains("B") || line[2].contains("S"));
        } catch (Exception e) {
            return false;
        }
    }

    public static boolean isValidPreparedSign(String[] lines){
        try{
            boolean toReturn = true;
            for(int i = 0; i < 4 && toReturn; i++) toReturn = patterns[i].matcher(lines[i]).matches();
            return toReturn && lines[2].split(":").length <= 2;
        } catch (Exception e){
            return false;
        }
    }

    public static float buyPrice(String text) {
        return price(text, true);
    }

    public static float sellPrice(String text) {
        return price(text, false);
    }

    private static float price(String text, boolean buy){
        String toContain = buy ? "b" : "s";
        text = text.replace(" ", "").toLowerCase();

        String[] split = text.split(":");
        int part = (text.contains(toContain) ? (split[0].contains(toContain) ? 0 : 1) : -1);
        if(part == -1 || (part == 1 && split.length != 2)) return -1;

        split[part] = split[part].replace(toContain, "");

        if (uNumber.isFloat(split[part])) {
            Float price = Float.parseFloat(split[part]);
            return (price > 0 ? price : -1);
        } else if (split[part].equals("free")) return 0;
        return -1;
    }

    public static int itemAmount(String text) {
        if (uNumber.isInteger(text)) {
            int amount = Integer.parseInt(text);
            return (amount >= 1 ? amount : 1);
        } else return 1;
    }
}