WebComplete\core\utils\helpers\StringHelper

Complexity

Total Complexity

7

Size/Duplication

Total Lines	115
Duplicated Lines	0 %

Importance

Changes

0

7 Methods

Rating	Name	Duplication	Size	Complexity
A	base64UrlDecode()	0	3	1
A	byteLength()	0	3	1
A	base64UrlEncode()	0	3	1
A	str2url()	0	7	1
A	byteSubstr()	0	3	1
B	rus2translit()	0	28	1
A	html2text()	0	9	1

<?php

namespace WebComplete\core\utils\helpers;

class StringHelper
{
    /**
     * Encodes string into "Base 64 Encoding with URL and Filename Safe Alphabet" (RFC 4648)
     *
     * > Note: Base 64 padding `=` may be at the end of the returned string.
     * > `=` is not transparent to URL encoding.
     *
     * @see https://tools.ietf.org/html/rfc4648#page-7
     * @param string $input the string to encode.
     * @return string encoded string.
     */
    public function base64UrlEncode($input): string
    {
        return \strtr(\base64_encode($input), '+/', '-_');
    }

    /**
     * Decodes "Base 64 Encoding with URL and Filename Safe Alphabet" (RFC 4648)
     *
     * @see https://tools.ietf.org/html/rfc4648#page-7
     * @param string $input encoded string.
     * @return string decoded string.
     */
    public function base64UrlDecode($input): string
    {
        return \base64_decode(\strtr($input, '-_', '+/'));
    }

    /**
     * Returns the number of bytes in the given string.
     * This method ensures the string is treated as a byte array by using `mb_strlen()`.
     * @param string $string the string being measured for length
     * @return int the number of bytes in the given string.
     */
    public function byteLength($string): int
    {
        return \mb_strlen($string, '8bit');
    }

    /**
     * Returns the portion of string specified by the start and length parameters.
     * This method ensures the string is treated as a byte array by using `mb_substr()`.
     * @param string $string the input string. Must be one character or longer.
     * @param int $start the starting position
     * @param int $length the desired portion length. If not specified or `null`, there will be
     * no limit on length i.e. the output will be until the end of the string.
     * @return string the extracted part of string, or FALSE on failure or an empty string.
     * @see http://www.php.net/manual/en/function.substr.php
     */
    public function byteSubstr($string, $start, $length = null): string
    {
        return \mb_substr($string, $start, $length ?? \mb_strlen($string, '8bit'), '8bit');
    }

    /**
     * @param $string
     * @return string
     */
    public function rus2translit($string): string
    {
        $converter = [
            'а' => 'a', 'б' => 'b', 'в' => 'v',
            'г' => 'g', 'д' => 'd', 'е' => 'e',
            'ё' => 'e', 'ж' => 'zh', 'з' => 'z',
            'и' => 'i', 'й' => 'y', 'к' => 'k',
            'л' => 'l', 'м' => 'm', 'н' => 'n',
            'о' => 'o', 'п' => 'p', 'р' => 'r',
            'с' => 's', 'т' => 't', 'у' => 'u',
            'ф' => 'f', 'х' => 'h', 'ц' => 'c',
            'ч' => 'ch', 'ш' => 'sh', 'щ' => 'sch',
            'ь' => '', 'ы' => 'y', 'ъ' => '',
            'э' => 'e', 'ю' => 'yu', 'я' => 'ya',

            'А' => 'A', 'Б' => 'B', 'В' => 'V',
            'Г' => 'G', 'Д' => 'D', 'Е' => 'E',
            'Ё' => 'E', 'Ж' => 'Zh', 'З' => 'Z',
            'И' => 'I', 'Й' => 'Y', 'К' => 'K',
            'Л' => 'L', 'М' => 'M', 'Н' => 'N',
            'О' => 'O', 'П' => 'P', 'Р' => 'R',
            'С' => 'S', 'Т' => 'T', 'У' => 'U',
            'Ф' => 'F', 'Х' => 'H', 'Ц' => 'C',
            'Ч' => 'Ch', 'Ш' => 'Sh', 'Щ' => 'Sch',
            'Ь' => '', 'Ы' => 'Y', 'Ъ' => '',
            'Э' => 'E', 'Ю' => 'Yu', 'Я' => 'Ya',
        ];
        return strtr($string, $converter);
    }

    /**
     * @param $str
     * @return string
     */
    public function str2url(string $str): string
    {
        $str = $this->rus2translit($str);
        $str = \strtolower($str);
        $str = \preg_replace('~[^-a-z0-9]+~u', '-', $str);
        $str = \trim($str, '-');
        return $str;
    }

    /**
     * @param string $html
     * @return string
     */
    public function html2text(string $html): string
    {
        $html = \str_replace(
            ["\n", '<br>', '<br/>', '<br />', '</div>', '</p>', '</h1>', '</h2>', '</h3>'],
            [' ', "\n", "\n", "\n", "</div>\n", "</p>\n", "</h1>\n", "</h2>\n", "</h3>\n"],
            $html
        );

        return \htmlspecialchars(\trim(\strip_tags($html)));
    }
}