87 lines
2.0 KiB
PHP
87 lines
2.0 KiB
PHP
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<?php
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/*
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* Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com>
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* SPDX-License-Identifier: MIT
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*/
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declare(strict_types=1);
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namespace Respect\Validation\Helpers;
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use DateTime;
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use DateTimeZone;
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use function checkdate;
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use function date_default_timezone_get;
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use function date_parse_from_format;
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use function preg_match;
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/**
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* Helper to handle date/time.
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*
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* @author Henrique Moody <henriquemoody@gmail.com>
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*/
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trait CanValidateDateTime
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{
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/**
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* Finds whether a value is a valid date/time in a specific format.
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*/
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private function isDateTime(string $format, string $value): bool
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{
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$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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$format = $exceptionalFormats[$format] ?? $format;
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$info = date_parse_from_format($format, $value);
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if (!$this->isDateTimeParsable($info)) {
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return false;
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}
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if ($this->isDateFormat($format)) {
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$formattedDate = DateTime::createFromFormat(
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$format,
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$value,
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new DateTimeZone(date_default_timezone_get())
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);
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if ($formattedDate === false || $value !== $formattedDate->format($format)) {
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return false;
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}
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return $this->isDateInformation($info);
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}
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return true;
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}
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/**
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* @param mixed[] $info
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*/
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private function isDateTimeParsable(array $info): bool
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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 isDateFormat(string $format): bool
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{
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return preg_match('/[djSFmMnYy]/', $format) > 0;
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}
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/**
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* @param mixed[] $info
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*/
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private function isDateInformation(array $info): bool
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{
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if ($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, 1, $info['year'] ?: 1);
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}
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}
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