Kontrolio\Rules\Core\Url

Complexity

Total Complexity

7

Size/Duplication

Total Lines	79
Duplicated Lines	0 %

Importance

Changes	4
Bugs	0	Features	0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	3	1
A	isValid()	0	25	6

<?php

namespace Kontrolio\Rules\Core;

use Kontrolio\Rules\AbstractRule;

/**
 * URL validation rule.
 *
 * @package Kontrolio\Rules\Core
 */
class Url extends AbstractRule
{
    /**
     * Url validation pattern.
     *
     * @see https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Validator/Constraints/UrlValidator.php
     */
    const PATTERN = '~^
            (%s)://                                 # protocol
            (([\pL\pN\-]+:)?([\pL\pN\-]+)@)?          # basic auth
            (
                ([\pL\pN\pS\-\.])+(\.?([\pL]|xn\-\-[\pL\pN\-]+)+\.?) # a domain name
                    |                                                # or
                \d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}                   # a IP address
                    |                                                # or
                \[
                    (?:(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){6})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:::(?:(?:(?:[0-9a-f]{1,4})):){5})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){4})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,1}(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){3})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,2}(?:(?:[0-9a-f]{1,4})))?::(?:(?:(?:[0-9a-f]{1,4})):){2})(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,3}(?:(?:[0-9a-f]{1,4})))?::(?:(?:[0-9a-f]{1,4})):)(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,4}(?:(?:[0-9a-f]{1,4})))?::)(?:(?:(?:(?:(?:[0-9a-f]{1,4})):(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9]))\.){3}(?:(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])))))))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,5}(?:(?:[0-9a-f]{1,4})))?::)(?:(?:[0-9a-f]{1,4})))|(?:(?:(?:(?:(?:(?:[0-9a-f]{1,4})):){0,6}(?:(?:[0-9a-f]{1,4})))?::))))
                \]  # a IPv6 address
            )
            (:[0-9]+)?                              # a port (optional)
            (/?|/\S+|\?\S*|\#\S*)                   # a /, nothing, a / with something, a query or a fragment
        $~ixu';

    /**
     * Checked protocols.
     *
     * @var array
     */
    private $protocols = ['http', 'https'];

    /**
     * Indicates whether DNS will be checked.
     *
     * @var bool
     */
    private $checkDNS;

    /**
     * Url constructor.
     *
     * @param bool $checkDNS
     */
    public function __construct($checkDNS = false)
    {
        $this->checkDNS = $checkDNS;
    }

    /**
     * Validates input.
     *
     * @param mixed $input
     *
     * @return bool
     */
    public function isValid($input = null)
    {
        if ($input === null || $input === '') {
            return false;
        }

        $pattern = sprintf(static::PATTERN, implode('|', $this->protocols));

        if (!preg_match($pattern, $input)) {
            $this->violations[] = 'url';

            return false;
        }

        if ($this->checkDNS) {
            $host = parse_url($input, PHP_URL_HOST);

            if (!checkdnsrr($host, 'ANY')) {
                $this->violations[] = 'dns';

                return false;
            }
        }

        return true;
    }
}