setTimestamp($timestamp); return $dt; } else { throw new \InvalidArgumentException('expected integer or null'); } } /** * @param string|null $text * @return \DatePeriod|null */ public static function parse($text) { if($text === null) { return null; } else { if(preg_match( '/^(?P\d{4})-(?P\d{2})-(?P\d{2})' .'([ T](?P\d{2}):(?P\d{2}):(?P\d{2}))?$/', $text, $attr )) { $start = new \DateTime(); $start->setDate($attr['y'], $attr['m'], $attr['d']); $start->setTime( isset($attr['h']) ? $attr['h'] : 0, isset($attr['i']) ? $attr['i'] : 0, isset($attr['s']) ? $attr['s'] : 0 ); if(isset($attr['h'])) { $interval = new \DateInterval('PT1S'); } else { $interval = new \DateInterval('P1D'); } $end = clone $start; $end->add($interval); return new \DatePeriod($start, $interval, $end); } else { throw new \InvalidArgumentException( sprintf("could not parse string '%s'", $text) ); } } } /** * @param string|null $text * @return \DateTime|null */ public static function parseGetStart($text) { $period = self::parse($text); if($period) { return $period->start; } else { return null; } } public static function deinvertInterval(\DateInterval $source = null) { // \DateInterval does not implement clone. // @see https://bugs.php.net/bug.php?id=50559 $result = unserialize(serialize($source)); if($result->invert) { $result->y *= -1; $result->m *= -1; $result->d *= -1; $result->h *= -1; $result->i *= -1; $result->s *= -1; $result->invert = 0; } return $result; } /** * @param \DateInterval|null $i * @return string|null */ public static function intervalToIso(\DateInterval $i = null) { if(is_null($i)) { return null; } else { $i = self::deinvertInterval($i); if($i->y < 0 || $i->m < 0 || $i->d < 0 || $i->h < 0 || $i->i < 0 || $i->s < 0) { throw new \Exception('negative intervals are not supported'); } else { return $i->format('P%yY%mM%dDT%hH%iM%sS'); } } } }