/**
* get the status object for the task
*
* @return CronTaskStatus
*/
public function getStatusObject()
{
if (!$this->statusObj) {
$this->setStatusObject(CronTaskStatus::get_status(get_class($this)));
}
return $this->statusObj;
}
/**
* Determine if a task should be run
*
* @param CronTask $task
* @param \Cron\CronExpression $cron
*/
protected function isTaskDue(CronTask $task, \Cron\CronExpression $cron)
{
// Get last run status
$status = CronTaskStatus::get_status(get_class($task));
// If the cron is due immediately, then run it
$now = new DateTime(SS_Datetime::now()->getValue());
if ($cron->isDue($now)) {
if (empty($status) || empty($status->LastRun)) {
return true;
}
// In case this process is invoked twice in one minute, supress subsequent executions
$lastRun = new DateTime($status->LastRun);
return $lastRun->format('Y-m-d H:i') != $now->format('Y-m-d H:i');
}
// If this is the first time this task is ever checked, no way to detect postponed execution
if (empty($status) || empty($status->LastChecked)) {
return false;
}
// Determine if we have passed the last expected run time
$nextExpectedDate = $cron->getNextRunDate($status->LastChecked);
return $nextExpectedDate <= $now;
}
/**
* Checks and runs a single CronTask
*
* @param CronTask $task
*/
public function runTask(CronTask $task)
{
$class_name = get_class($task);
$status = CronTaskStatus::get_status($class_name);
$cron = CronExpression::factory($status->ScheduleString);
$isDue = $this->isTaskDue($task, $cron);
if ($isDue) {
$this->output($class_name . ' will start now.');
$task->doProcess();
foreach ($task->getMessages() as $message) {
$this->output($class_name . ': ' . $message);
}
} else {
$this->output($class_name . ' will run at ' . $cron->getNextRunDate()->format('Y-m-d H:i:s') . '.');
}
}
