Frontend\Modules\Mailmotor\Actions\Subscribe::execute PHP Method

    public function execute()
    {
        parent::execute();
        // Define email from the subscribe widget
        $email = $this->getEmail();
        // Create the form
        $form = $this->createForm($this->get('mailmotor.form.subscription'), new Subscription($email, FRONTEND_LANGUAGE));
        $form->handleRequest($this->get('request'));
        if (!$form->isValid()) {
            $this->tpl->assign('form', $form->createView());
            if ($form->isSubmitted()) {
                $this->tpl->assign('mailmotorSubscribeHasFormError', true);
            }
            $this->loadTemplate();
            $this->parse();
            return;
        }
        $redirectLink = FrontendNavigation::getURLForBlock('Mailmotor', 'Subscribe') . '?subscribed=true';
        /** @var Subscription $subscription */
        $subscription = $form->getData();
        try {
            // The command bus will handle the unsubscription
            $this->get('command_bus')->handle($subscription);
        } catch (NotImplementedException $e) {
            // fallback for when no mail-engine is chosen in the Backend
            $this->get('event_dispatcher')->dispatch(NotImplementedSubscribedEvent::EVENT_NAME, new NotImplementedSubscribedEvent($subscription));
            $redirectLink .= '&double-opt-in=false';
        }
        $redirectLink .= '#mailmotorSubscribeForm';
        return $this->redirect($redirectLink);
    }