silverstripe / deploynaut

     *

     * @return DataObject|null The next step in the pipeline, or null if none remain.

     */

    protected function findNextStep()

    {

        // otherwise get next step in chain

        $currentStep = $this->CurrentStep();

        return $this

            ->Steps()

            ->filter("Status", "Queued")

            ->filter("Order:GreaterThanOrEqual", $currentStep->Order)

            ->exclude("ID", $currentStep->ID)

            ->sort("Order ASC")

            ->first();

    }

    /**

     *

     * @return DataObject|null The previous step in the pipeline, or null if this is the first.

     */

    public function findPreviousStep()

    {

        // otherwise get previous step in chain

        $currentStep = $this->CurrentStep();

        return $this

            ->Steps()

            ->filter("Status", "Finished")

            ->filter("Order:LessThanOrEqual", $currentStep->Order)

            ->exclude("ID", $currentStep->ID)

            ->sort("Order DESC")

            ->first();

    }

    /**