88 lines
2.0 KiB
PHP
88 lines
2.0 KiB
PHP
<?php
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/*
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* This file is part of Respect/Validation.
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*
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* (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
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*
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* For the full copyright and license information, please view the "LICENSE.md"
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* file that was distributed with this source code.
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*/
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namespace Respect\Validation\Rules;
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use DateTime;
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use DateTimeInterface;
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class Date extends AbstractRule
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{
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public $format = null;
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public function __construct($format = null)
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{
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$this->format = $format;
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}
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public function validate($input)
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{
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if ($input instanceof DateTimeInterface
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|| $input instanceof DateTime) {
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return true;
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}
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if (!is_scalar($input)) {
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return false;
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}
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$inputString = (string) $input;
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if (is_null($this->format)) {
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return false !== strtotime($inputString);
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}
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$exceptionalFormats = [
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'c' => 'Y-m-d\TH:i:sP',
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'r' => 'D, d M Y H:i:s O',
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];
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if (in_array($this->format, array_keys($exceptionalFormats))) {
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$this->format = $exceptionalFormats[$this->format];
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}
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return $this->isValidForFormatProvided($input);
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}
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private function isValidForFormatProvided($input)
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{
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$info = date_parse_from_format($this->format, $input);
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if (!$this->isParsable($info)) {
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return false;
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}
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if ($this->hasDateFormat()) {
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return $this->hasValidDate($info);
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}
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return true;
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}
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private function isParsable(array $info)
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{
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return ($info['error_count'] === 0 && $info['warning_count'] === 0);
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}
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private function hasDateFormat()
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{
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return preg_match('/[djSFmMnYy]/', $this->format) > 0;
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}
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private function hasValidDate(array $info)
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{
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if ($info['day']) {
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return checkdate((int) $info['month'], $info['day'], (int) $info['year']);
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}
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return checkdate($info['month'] ?: 1, $info['day'] ?: 1, $info['year'] ?: 1);
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}
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}
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