山に住む一家は千個の巣から蜂蜜を収穫し、幼い子供たちは新しい畑で5エーカーの野菜を栽培している。scheduled_date
*
* @var int
*/
protected $scheduled_timestamp = NULL;
/**
* @param DateTime $date The date & time to run the action.
*/
public function __construct( DateTime $date ) {
$this->scheduled_date = $date;
}
/**
* Check if a schedule should recur.
*
* @return bool
*/
abstract public function is_recurring();
/**
* Calculate when the next instance of this schedule would run based on a given date & time.
*
* @param DateTime $after
* @return DateTime
*/
abstract protected function calculate_next( DateTime $after );
/**
* Get the next date & time when this schedule should run after a given date & time.
*
* @param DateTime $after
* @return DateTime|null
*/
public function get_next( DateTime $after ) {
$after = clone $after;
if ( $after > $this->scheduled_date ) {
$after = $this->calculate_next( $after );
return $after;
}
return clone $this->scheduled_date;
}
/**
* Get the da