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<?php

/**
 *
 * @package   Duplicator
 * @copyright (c) 2022, Snap Creek LLC
 */

namespace Duplicator\Libs\Snap;

class SnapURL
{
 /** @var array<string, scalar> */
 protected static $DEF_ARRAY_PARSE_URL = array(
 'scheme' => false,
 'host' => false,
 'port' => false,
 'user' => false,
 'pass' => false,
 'path' => '',
 'query' => false,
 'fragment' => false
 );

/**
     * Append a new query value to the end of a URL
     *
     * @param string  $url   The URL to append the new value to
     * @param string  $key   The new key name
     * @param ?scalar $value The new key name value
     *
     * @return string Returns the new URL with with the query string name and value
     */
    public static function appendQueryValue($url, $key, $value)
    {
        $separator    = (parse_url($url, PHP_URL_QUERY) == null) ? '?' : '&';
        $modified_url = $url . "$separator$key=" . $value;

return $modified_url;
    }

/**
     * Add www. in url if don't have
     *
     * @param string $url input URL
     *
     * @return string
     */
    public static function wwwAdd($url)
    {
        return preg_replace('/^((?:\w+\:)?\/\/)?(?!www\.)(.+)/', '$1www.$2', $url);
    }

/**
     * Remove www. in url if don't have
     *
     * @param string $url input URL
     *
     * @return string
     */
    public static function wwwRemove($url)
    {
        return preg_replace('/^((?:\w+\:)?\/\/)?www\.(.+)/', '$1$2', $url);
    }

/**
     * Fetches current URL via PHP
     *
     * @param bool    $queryString       If true the query string will also be returned.
     * @param boolean $requestUri        If true check REQUEST_URI else  SCRIPT_NAME
     * @param int     $getParentDirLevel If 0 get current script name or parent folder, if 1 parent folder if 2 parent of parent folder ...
     *
     * @return string The current page url
     */
    public static function getCurrentUrl($queryString = true, $requestUri = false, $getParentDirLevel = 0)
    {
        // *** HOST
        if (isset($_SERVER['HTTP_X_ORIGINAL_HOST'])) {
            $host = $_SERVER['HTTP_X_ORIGINAL_HOST'];
        } else {
            $host = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME']; //WAS SERVER_NAME and caused problems on some boxes
        }

// *** PROTOCOL
        if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https') {
            $_SERVER ['HTTPS'] = 'on';
        }
        if (isset($_SERVER['HTTP_X_FORWARDED_SSL']) && $_SERVER['HTTP_X_FORWARDED_SSL'] === 'https') {
            $_SERVER ['HTTPS'] = 'on';
        }
        if (isset($_SERVER['HTTP_CF_VISITOR'])) {
            $visitor = json_decode($_SERVER['HTTP_CF_VISITOR']);
            if (is_object($visitor) && property_exists($visitor, 'scheme') && $visitor->scheme == 'https') {
                $_SERVER ['HTTPS'] = 'on';
            }
        }
        $protocol = 'http' . ((isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) === 'on') ? 's' : '');

if ($requestUri) {
 $serverUrlSelf = preg_replace('/\?.*$/', '', $_SERVER['REQUEST_URI']);
 } else {
 // *** SCRIPT NAME
 $serverUrlSelf = $_SERVER['SCRIPT_NAME'];
 for ($i = 0; $i < $getParentDirLevel; $i++) {
 $serverUrlSelf = preg_match('/^[\\\\\/]?$/', dirname($serverUrlSelf)) ? '' : dirname($serverUrlSelf);
 }
 }

// *** QUERY STRING
        $query = ($queryString && isset($_SERVER['QUERY_STRING']) && strlen($_SERVER['QUERY_STRING']) > 0 ) ? '?' . $_SERVER['QUERY_STRING'] : '';

return $protocol . '://' . $host . $serverUrlSelf . $query;
    }

/**
     * Get current query string data array
     *
     * @return string[]
     */
    public static function getCurrentQueryURLdata()
    {
        $result = array();
        if (!isset($_SERVER['QUERY_STRING']) || strlen($_SERVER['QUERY_STRING']) == 0) {
            return $result;
        }

parse_str($_SERVER['QUERY_STRING'], $result);

return $result;
    }

/**
 * this function is a native PHP parse_url wrapper
 * this function returns an associative array with all the keys present and the values = false if they do not exist.
 *
 * @param string $url The URL to parse. Invalid characters are replaced by _.
 * @param int $component if != 1 return specific URL component
 *
 * @return mixed[]|string|int|null|false On seriously malformed URLs, parse_url() may return <code>FALSE</code>.
 * If the <code>component</code> parameter is omitted, an associative <code>array</code> is returned.
 * At least one element will be present within the array. Potential keys within this array are:
 * <ul>
 * <li> scheme - e.g. http </li>
 * <li> host </li>
 * <li> port </li>
 * <li> user </li>
 * <li> pass </li>
 * <li> path </li>
 * <li> query - after the question mark ? </li>
 * <li> fragment - after the hashmark # </li>
 * </ul>
 * If the <code>component</code> parameter is specified,
 * parse_url() returns a <code>string</code> (or an <code>integer</code>,
 * in the case of <code>PHP_URL_PORT</code>) instead of an <code>array</code>.
 * If the requested component doesn't exist within the given URL, <code>NULL</code> will be returned.
 */
 public static function parseUrl($url, $component = -1)
 {
 if (preg_match('/^([a-zA-Z0-9]+\:)?\/\//', $url) !== 1) {
 // fix invalid URL for only host string ex. 'myhost.com'
 $url = '//' . $url;
 }

$result = parse_url($url, $component);
        if (is_array($result)) {
            $result = array_merge(self::$DEF_ARRAY_PARSE_URL, $result);
        }

return $result;
    }

/**
     * Remove scheme from URL
     *
     * @param string $url       source url
     * @param bool   $removeWww if true remove www
     *
     * @return string
     */
    public static function removeScheme($url, $removeWww = false)
    {
        $parts = self::parseUrl($url);
        unset($parts['scheme']);
        $result = self::buildUrl($parts);
        if ($removeWww) {
            $result = self::wwwRemove($result);
        }
        return ltrim($result, '/');
    }

/**
 * this function build a url from array result of parse url.
 * if work with both parse_url native function result and snap parseUrl result
 *
 * @param array<string, mixed> $parts url parts from parseUrl
 *
 * @return bool|string return false if param isn't array
 */
 public static function buildUrl($parts)
 {
 if (!is_array($parts)) {
 return false;
 }

$result  = '';
        $result .= (isset($parts['scheme']) && $parts['scheme'] !== false) ? $parts['scheme'] . ':' : '';
        $result .= (
            (isset($parts['user']) && $parts['user'] !== false) ||
            (isset($parts['host']) && $parts['host'] !== false)) ? '//' : '';

$result .= (isset($parts['user']) && $parts['user'] !== false) ? $parts['user'] : '';
        $result .= (isset($parts['pass']) && $parts['pass'] !== false) ? ':' . $parts['pass'] : '';
        $result .= (isset($parts['user']) && $parts['user'] !== false) ? '@' : '';

$result .= (isset($parts['host']) && $parts['host'] !== false) ? $parts['host'] : '';
        $result .= (isset($parts['port']) && $parts['port'] !== false) ? ':' . $parts['port'] : '';

$result .= (isset($parts['path']) && $parts['path'] !== false) ? $parts['path'] : '';
        $result .= (isset($parts['query']) && $parts['query'] !== false) ? '?' . $parts['query'] : '';
        $result .= (isset($parts['fragment']) && $parts['fragment'] !== false) ? '#' . $parts['fragment'] : '';

return $result;
    }

/**
     * Encode alla chars
     *
     * @param string $url input URL
     *
     * @return string
     */
    public static function urlEncodeAll($url)
    {
        $hex = unpack('H*', urldecode($url));
        return preg_replace('~..~', '%$0', strtoupper($hex[1]));
    }
}