use CRMCoreBundleEntityCustomer;
use DoctrineORMEventPreUpdateEventArgs;

class CustomerPreUpdateListener
{
    public function preUpdate(PreUpdateEventArgs $args)
    {
        $entity = $args->getObject();
        if (!($entity instanceof Customer)) {
            return;
        }

        if($this->isStatusChanged($args)) {
            $this->syncParentLeadStatus($args);
        }
    }

    private function isStatusChanged(PreUpdateEventArgs $args)
    {
        return $args->hasChangedField('status');
    }

    private function syncParentLeadStatus(PreUpdateEventArgs $args)
    {
        /** @var Customer $entity */
        $entity = $args->getObject();
        if(!$entity->getLead()) {
            return;
        }

        $newStatus = $args->getNewValue('status');
        $entity->getLead()->setStatus($newStatus);
        $args->getEntityManager()->persist($entity->getLead());
    }
}

use CRMBasicLeadsBundleEntityLead;
use CRMCoreBundleEntityCustomer;
use DoctrineORMEventPreUpdateEventArgs;

class LeadPreUpdateListener
{
    public function preUpdate(PreUpdateEventArgs $args)
    {
        $entity = $args->getObject();
        if (!($entity instanceof Lead)) {
            return;
        }

        if($this->isStatusChanged($args)) {
            $this->syncCustomerStatus($args);
        }
    }

    private function isStatusChanged(PreUpdateEventArgs $args)
    {
        return $args->hasChangedField('status');
    }

    private function syncCustomerStatus(PreUpdateEventArgs $args)
    {
        /** @var Lead $entity */
        $entity = $args->getObject();
        if(0 === $entity->getCustomersCreated()->count()) {
            return;
        }

        $newStatus = $args->getNewValue('status');
        foreach ($entity->getCustomersCreated() as $customer) {
            /** @var Customer $customer */
            $customer->setStatus($newStatus);
            $args->getEntityManager()->persist($customer);
        }
    }
}