Aura\Filter\Rule\Validate\Url

Complexity

Total Complexity

7

Size/Duplication

Total Lines	48
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	0

Test Coverage

Coverage

100%

Importance

Changes

0

1 Method

Rating	Name	Duplication	Size	Complexity
C	__invoke()	0	31	7

<?php
/**
 *
 * This file is part of Aura for PHP.
 *
 * @license http://opensource.org/licenses/bsd-license.php BSD
 *
 */
namespace Aura\Filter\Rule\Validate;

/**
 *
 * Validates the value as a URL.
 *
 * @package Aura.Filter
 *
 */
class Url
{
    /**
     *
     * Validates the value as a URL.
     *
     * The value must match a generic URL format; for example,
     * ``http://example.com``, ``mms://example.org``, and so on.
     *
     * @param object $subject The subject to be filtered.
     *
     * @param string $field The subject field name.
     *
     * @return bool True if valid, false if not.
     *
     */
    public function __invoke($subject, $field)
    {
        $value = $subject->$field;
        if (! is_scalar($value)) {
            return false;
        }

        // first, make sure there are no invalid chars, list from ext/filter
        $other = "$-_.+"        // safe
               . "!*'(),"       // extra
               . "{}|\\^~[]`"   // national
               . "<>#%\""       // punctuation
               . ";/?:@&=";     // reserved

        $valid = 'a-zA-Z0-9' . preg_quote($other, '/');
        $clean = preg_replace("/[^$valid]/", '', $value);
        if ($value != $clean) {
            return false;
        }

        // now make sure it parses as a URL with scheme and host
        $result = @parse_url($value);
        if (empty($result['scheme']) || trim($result['scheme']) == '' ||
            empty($result['host'])   || trim($result['host']) == '') {
            // need a scheme and host
            return false;
        } else {
            // looks ok
            return true;
        }
    }
}