mirror of https://github.com/friendica/friendica
256 lines
6.4 KiB
PHP
256 lines
6.4 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2022, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Util;
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use Friendica\Core\Logger;
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use DateTime;
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use DateTimeZone;
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use Exception;
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/**
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* Temporal class
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*/
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class DateTimeFormat
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{
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const ATOM = 'Y-m-d\TH:i:s\Z';
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const MYSQL = 'Y-m-d H:i:s';
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const HTTP = 'D, d M Y H:i:s \G\M\T';
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const JSON = 'Y-m-d\TH:i:s.v\Z';
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const API = 'D M d H:i:s +0000 Y';
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static $localTimezone = 'UTC';
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public static function setLocalTimeZone(string $timezone)
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{
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self::$localTimezone = $timezone;
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}
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/**
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* convert() shorthand for UTC.
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*
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* @param string $time A date/time string
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* @param string $format DateTime format string or Temporal constant
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* @return string
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* @throws Exception
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*/
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public static function utc(string $time, string $format = self::MYSQL): string
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{
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return self::convert($time, 'UTC', 'UTC', $format);
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}
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/**
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* convert() shorthand for local.
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*
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* @param string $time A date/time string
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* @param string $format DateTime format string or Temporal constant
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* @return string
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* @throws Exception
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*/
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public static function local($time, $format = self::MYSQL)
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{
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return self::convert($time, self::$localTimezone, 'UTC', $format);
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}
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/**
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* convert() shorthand for timezoned now.
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*
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* @param $timezone
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* @param string $format DateTime format string or Temporal constant
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* @return string
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* @throws Exception
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*/
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public static function timezoneNow($timezone, $format = self::MYSQL)
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{
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return self::convert('now', $timezone, 'UTC', $format);
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}
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/**
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* convert() shorthand for local now.
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*
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* @param string $format DateTime format string or Temporal constant
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* @return string
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* @throws Exception
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*/
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public static function localNow($format = self::MYSQL)
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{
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return self::local('now', $format);
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}
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/**
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* convert() shorthand for UTC now.
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*
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* @param string $format DateTime format string or Temporal constant
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* @return string
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* @throws Exception
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*/
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public static function utcNow(string $format = self::MYSQL): string
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{
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return self::utc('now', $format);
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}
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/**
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* General purpose date parse/convert/format function.
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*
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* @param string $s Some parseable date/time string
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* @param string $tz_to Destination timezone
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* @param string $tz_from Source timezone
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* @param string $format Output format recognised from php's DateTime class
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* http://www.php.net/manual/en/datetime.format.php
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*
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* @return string Formatted date according to given format
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* @throws Exception
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*/
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public static function convert(string $s = 'now', string $tz_to = 'UTC', string $tz_from = 'UTC', string $format = self::MYSQL): string
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{
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// Defaults to UTC if nothing is set, but throws an exception if set to empty string.
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// Provide some sane defaults regardless.
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if ($tz_from === '') {
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$tz_from = 'UTC';
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}
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if ($tz_to === '') {
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$tz_to = 'UTC';
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}
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if (($s === '') || (!is_string($s))) {
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$s = 'now';
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}
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// Lowest possible datetime value
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if (substr($s, 0, 10) <= '0001-01-01') {
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$d = new DateTime('now', new DateTimeZone('UTC'));
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$d->setDate(1, 1, 1)->setTime(0, 0);
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return $d->format($format);
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}
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try {
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$from_obj = new DateTimeZone($tz_from);
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} catch (Exception $e) {
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$from_obj = new DateTimeZone('UTC');
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}
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try {
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$d = new DateTime($s, $from_obj);
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} catch (Exception $e) {
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try {
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$d = new DateTime(self::fix($s), $from_obj);
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} catch (\Throwable $e) {
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Logger::warning('DateTimeFormat::convert: exception: ' . $e->getMessage());
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$d = new DateTime('now', $from_obj);
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}
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}
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try {
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$to_obj = new DateTimeZone($tz_to);
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} catch (Exception $e) {
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$to_obj = new DateTimeZone('UTC');
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}
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$d->setTimezone($to_obj);
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return $d->format($format);
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}
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/**
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* Fix weird date formats.
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*
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* Note: This method isn't meant to sanitize valid date/time strings, for example it will mangle relative date
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* strings like "now - 3 days".
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*
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* @see \Friendica\Test\src\Util\DateTimeFormatTest::dataFix() for a list of examples handled by this method.
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* @param string $dateString
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* @return string
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*/
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public static function fix(string $dateString): string
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{
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$search = ['Mär', 'März', 'Mai', 'Juni', 'Juli', 'Okt', 'Dez', 'ET' , 'ZZ', ' - ', '+'];
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$replace = ['Mar', 'Mar' , 'May', 'Jun' , 'Jul' , 'Oct', 'Dec', 'EST', 'Z' , ', ' , '+' ];
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$dateString = str_replace($search, $replace, $dateString);
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$pregPatterns = [
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['#(\w+), (\d+ \w+ \d+) (\d+:\d+:\d+) (.+)#', '$2 $3 $4'],
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['#(\d+:\d+) (\w+), (\w+) (\d+), (\d+)#', '$1 $2 $3 $4 $5'],
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];
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foreach ($pregPatterns as $pattern) {
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$dateString = preg_replace($pattern[0], $pattern[1], $dateString);
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}
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return $dateString;
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}
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/**
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* Checks, if the given string is a date with the pattern YYYY-MM
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*
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* @param string $dateString The given date
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*
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* @return boolean True, if the date is a valid pattern
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*/
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public function isYearMonth(string $dateString)
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{
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// Check format (2019-01, 2019-1, 2019-10)
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if (!preg_match('/^([12]\d{3}-(1[0-2]|0[1-9]|\d))$/', $dateString)) {
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return false;
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}
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$date = DateTime::createFromFormat('Y-m', $dateString);
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if (!$date) {
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return false;
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}
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try {
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$now = new DateTime();
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} catch (\Throwable $t) {
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return false;
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}
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if ($date > $now) {
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return false;
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}
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return true;
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}
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/**
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* Checks, if the given string is a date with the pattern YYYY-MM-DD
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*
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* @param string $dateString The given date
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*
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* @return boolean True, if the date is a valid pattern
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*/
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public function isYearMonthDay(string $dateString)
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{
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$date = DateTime::createFromFormat('Y-m-d', $dateString);
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if (!$date) {
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return false;
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}
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if (DateTime::getLastErrors()['error_count'] || DateTime::getLastErrors()['warning_count']) {
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return false;
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}
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return true;
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}
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}
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