<?php

/**
 * @copyright  2020 Podlibre
 * @license    https://www.gnu.org/licenses/agpl-3.0.en.html AGPL3
 * @link       https://castopod.org/
 */

if (!function_exists('get_browser_language')) {
    /**
     * Gets the browser default language using the request header key `HTTP_ACCEPT_LANGUAGE`
     *
     * @return string ISO 639-1 language code
     */
    function get_browser_language(string $httpAcceptLanguage): string
    {
        $langs = explode(',', $httpAcceptLanguage);

        return substr($langs[0], 0, 2);
    }
}

if (!function_exists('slugify')) {
    function slugify(string $text): string
    {
        // replace non letter or digits by -
        $text = preg_replace('~[^\pL\d]+~u', '-', $text);

        $unwanted = [
            'Š' => 'S',
            'š' => 's',
            'Đ' => 'Dj',
            'đ' => 'dj',
            'Ž' => 'Z',
            'ž' => 'z',
            'Č' => 'C',
            'č' => 'c',
            'Ć' => 'C',
            'ć' => 'c',
            'À' => 'A',
            'Á' => 'A',
            'Â' => 'A',
            'Ã' => 'A',
            'Ä' => 'A',
            'Å' => 'A',
            'Æ' => 'AE',
            'Ç' => 'C',
            'È' => 'E',
            'É' => 'E',
            'Ê' => 'E',
            'Ë' => 'E',
            'Ì' => 'I',
            'Í' => 'I',
            'Î' => 'I',
            'Ï' => 'I',
            'Ñ' => 'N',
            'Ò' => 'O',
            'Ó' => 'O',
            'Ô' => 'O',
            'Õ' => 'O',
            'Ö' => 'O',
            'Ø' => 'O',
            'Œ' => 'OE',
            'Ù' => 'U',
            'Ú' => 'U',
            'Û' => 'U',
            'Ü' => 'U',
            'Ý' => 'Y',
            'Þ' => 'B',
            'ß' => 'Ss',
            'à' => 'a',
            'á' => 'a',
            'â' => 'a',
            'ã' => 'a',
            'ä' => 'a',
            'å' => 'a',
            'æ' => 'ae',
            'ç' => 'c',
            'è' => 'e',
            'é' => 'e',
            'ê' => 'e',
            'ë' => 'e',
            'ì' => 'i',
            'í' => 'i',
            'î' => 'i',
            'ï' => 'i',
            'ð' => 'o',
            'ñ' => 'n',
            'ò' => 'o',
            'ó' => 'o',
            'ô' => 'o',
            'õ' => 'o',
            'ö' => 'o',
            'ø' => 'o',
            'œ' => 'OE',
            'ù' => 'u',
            'ú' => 'u',
            'û' => 'u',
            'ý' => 'y',
            'þ' => 'b',
            'ÿ' => 'y',
            'Ŕ' => 'R',
            'ŕ' => 'r',
            '/' => '-',
            ' ' => '-',
        ];
        $text = strtr($text, $unwanted);

        // transliterate
        $text = iconv('utf-8', 'us-ascii//TRANSLIT', $text);

        // remove unwanted characters
        $text = preg_replace('~[^\-\w]+~', '', $text);

        // trim
        $text = trim($text, '-');

        // remove duplicate -
        $text = preg_replace('~-+~', '-', $text);

        // lowercase
        $text = strtolower($text);

        return $text;
    }
}

//--------------------------------------------------------------------

if (!function_exists('format_duration')) {
    /**
     * Formats duration in seconds to an hh:mm:ss string
     *
     * @param int $seconds seconds to format
     */
    function format_duration(int $seconds, string $separator = ':'): string
    {
        return sprintf(
            '%02d%s%02d%s%02d',
            floor($seconds / 3600),
            $separator,
            ($seconds / 60) % 60,
            $separator,
            $seconds % 60,
        );
    }
}

//--------------------------------------------------------------------