symbiote / silverstripe-advancedworkflow

     *

     * @param int $when Timestamp to start this job, or null to start immediately

     */

    protected function ensurePublishJob($when)

    {

        // Check if there is a prior job

        if ($this->owner->PublishJobID) {

            $job = $this->owner->PublishJob();

            // Use timestamp for sake of comparison.

            if ($job && $job->exists() && DBDatetime::create()->setValue($job->StartAfter)->getTimestamp() == $when) {

                return;

            }

            $this->clearPublishJob();

        }

        // Create a new job with the specified schedule

        $job = new WorkflowPublishTargetJob($this->owner, 'publish');

        $this->owner->PublishJobID = Injector::inst()->get(QueuedJobService::class)

                ->queueJob($job, $when ? date('Y-m-d H:i:s', $when) : null);

    }

    /**

     * Ensure the existence of an unpublish job at the specified time

     *

     * @param int $when Timestamp to start this job, or null to start immediately

     */

    protected function ensureUnPublishJob($when)

    {

        // Check if there is a prior job

        if ($this->owner->UnPublishJobID) {

            $job = $this->owner->UnPublishJob();

            // Use timestamp for sake of comparison.

            if ($job && $job->exists() && DBDatetime::create()->setValue($job->StartAfter)->getTimestamp() == $when) {

                return;

            }

            $this->clearUnPublishJob();

        }

        // Create a new job with the specified schedule

        $job = new WorkflowPublishTargetJob($this->owner, 'unpublish');

        $this->owner->UnPublishJobID = Injector::inst()->get(QueuedJobService::class)

            ->queueJob($job, $when ? date('Y-m-d H:i:s', $when) : null);

    }

    public function onBeforeDuplicate($original, $doWrite)

    {