Check if any of the referee properties can verify the referral.

CanTransitionToVerifyListener.php

<?php

namespace AppBundle\EventListener\Referral;

use AppBundle\Entity\Referral;
use SM\Event\TransitionEvent;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;

class CanTransitionToVerifyListener
{

/**
 * canTransition
 *
 * Check if any of the referee properties can verify the referral.
 *
 * @param  TransitionEvent          $event
 * @param  string                   $eventName
 * @param  EventDispatcherInterface $dispatcher
 * @return $event
 */
   public function canTransition(TransitionEvent $event, $eventName, EventDispatcherInterface $dispatcher)
    {
        $container = $dispatcher->getContainer();
        $config = $event->getConfig();

        // If we are not trying to apply the verified
        // status then do not continue.
        if ('verified' != $config['to']) {
            return;
        }

        // Get the state machine and the associated object.
        $stateMachine = $event->getStateMachine();
        $object = $stateMachine->getObject();

        // If the state machine object is not a referral one (i.e another
        // statemachine could have a 'verified' state but we
        // want to make sure it is only on a referral).
        if (!$object instanceof Referral) {
            return;
        }

        $entityManager = $container->get('doctrine')->getEntityManager();
        $userRepository = $entityManager->getRepository('AppBundle:User');

        // Attempt to get the referee user object.
        if (!$refereeUser = $userRepository->findOneBy(array('email' => $object->getRefereeEmail()))) {
            return;
        }

        $propertyRepository = $entityManager->getRepository('AppBundle:Property');

        // Attempt to get an array of properties owned by the referee user.
        $properties = $propertyRepository->findBy(array('user' => $refereeUser->getId(), 'listingType' => 'selling'));

        // Initially reject the event as we want to
        // strictly control who can be verified
        $event->setRejected(true);

        // Loop over the referee properties anc check
        // if any of them can verify the referral.
        foreach ($properties as $index => $property) {
            if ($property->getGoLiveDate() != null) {
                // If the property has a package type is listed as selling.
                if ($package = $property->getPackage()) {
                    // Check property criteria to determine if the status should be progressed.
                    // Progress to "verified" rules:
                    // - Pay as you go: Signed up for 8 weeks/sold.
                    // - Pay on completion: After trial/sold.
                    if (
                        ($package->getRecurringCost() && $property->getDaysSinceGoLive() > 56) || // PAYG
                        (!$package->getRecurringCost() && $property->getTrialPeriodDaysRemaining() == 0) // PAYLAT
                    ) {
                        // This property can verify the referral so let the state
                        // machine know it can transition to the verified state.
                        $event->setRejected(false);
                    }
                }
            }
        }

       return $event;
   }
}