<?php

/**
 *  PHP Mikrotik Billing (https://github.com/hotspotbilling/phpnuxbill/)
 *  by https://t.me/ibnux
 *
 *  This file is for Text Transformation
 **/

class Text
{

    public static function toHex($string)
    {
        return "\x" . implode("\x", str_split(array_shift(unpack('H*', $string)), 2));
    }

    public static function alphanumeric($str, $tambahan = "")
    {
        return preg_replace("/[^a-zA-Z0-9" . $tambahan . "]+/", "", $str);
    }

    public static function numeric($str)
    {
        return preg_replace("/[^0-9]+/", "", $str);
    }

    public static function ucWords($text)
    {
        return ucwords(str_replace('_', ' ', $text));
    }

    public static function randomUpLowCase($text)
    {
        $jml = strlen($text);
        $result = '';
        for ($i = 0; $i < $jml; $i++) {
            if (rand(0, 99) % 2) {
                $result .= strtolower(substr($text, $i, 1));
            } else {
                $result .= substr($text, $i, 1);
            }
        }
        return $result;
    }

    public static function maskText($text)
    {
        $len = strlen($text);
        if ($len < 3) {
            return "***";
        } else if ($len < 5) {
            return substr($text, 0, 1) . "***" . substr($text, -1, 1);
        } else if ($len < 8) {
            return substr($text, 0, 2) . "***" . substr($text, -2, 2);
        } else {
            return substr($text, 0, 4) . "******" . substr($text, -3, 3);
        }
    }

    public static function sanitize($str)
    {
        return preg_replace("/[^A-Za-z0-9]/", '_', $str);;
    }

    public static function is_html($string)
    {
        return preg_match("/<[^<]+>/", $string, $m) != 0;
    }
}