/**
* Transforms a date string in the configured timezone into a DateTime object.
*
* @param string $value A value as produced by PHP's date() function
*
* @return \DateTime An instance of \DateTime
*
* @throws TransformationFailedException If the given value is not a string,
* if the date could not be parsed or
* if the input timezone is not supported.
*/
public function reverseTransform($value)
{
if (empty($value)) {
return;
}
if (!is_string($value)) {
throw new TransformationFailedException('Expected a string.');
}
$outputTz = new \DateTimeZone($this->outputTimezone);
$dateTime = Date::createFromFormat($this->parseFormat, $value, $outputTz);
$lastErrors = Date::getLastErrors();
if (0 < $lastErrors['warning_count'] || 0 < $lastErrors['error_count']) {
throw new TransformationFailedException(implode(', ', array_merge(array_values($lastErrors['warnings']), array_values($lastErrors['errors']))));
}
try {
// On PHP versions < 5.3.7 we need to emulate the pipe operator
// and reset parts not given in the format to their equivalent
// of the UNIX base timestamp.
if (!$this->parseUsingPipe) {
list($year, $month, $day, $hour, $minute, $second) = explode('-', $dateTime->format('Y-m-d-H-i-s'));
// Check which of the date parts are present in the pattern
preg_match('/(' . '(?P<day>[djDl])|' . '(?P<month>[FMmn])|' . '(?P<year>[Yy])|' . '(?P<hour>[ghGH])|' . '(?P<minute>i)|' . '(?P<second>s)|' . '(?P<dayofyear>z)|' . '(?P<timestamp>U)|' . '[^djDlFMmnYyghGHiszU]' . ')*/', $this->parseFormat, $matches);
// preg_match() does not guarantee to set all indices, so
// set them unless given
$matches = array_merge(array('day' => false, 'month' => false, 'year' => false, 'hour' => false, 'minute' => false, 'second' => false, 'dayofyear' => false, 'timestamp' => false), $matches);
// Reset all parts that don't exist in the format to the
// corresponding part of the UNIX base timestamp
if (!$matches['timestamp']) {
if (!$matches['dayofyear']) {
if (!$matches['day']) {
$day = 1;
}
if (!$matches['month']) {
$month = 1;
}
}
if (!$matches['year']) {
$year = 1970;
}
if (!$matches['hour']) {
$hour = 0;
}
if (!$matches['minute']) {
$minute = 0;
}
if (!$matches['second']) {
$second = 0;
}
$dateTime = $dateTime->setDate($year, $month, $day);
$dateTime = $dateTime->setTime($hour, $minute, $second);
}
}
if ($this->inputTimezone !== $this->outputTimezone) {
$dateTime = $dateTime->setTimezone(new \DateTimeZone($this->inputTimezone));
}
} catch (\Exception $e) {
throw new TransformationFailedException($e->getMessage(), $e->getCode(), $e);
}
return $dateTime;
}
