SendingFormByEmailAndRedirecting.php

<?php

class SendingFormByEmailAndRedirecting
{
    private $form;
    private $email;
    private $formRedirection;

    function __construct(
        FormEmail $email,
        Form $form,
        FormRedirection $formRedirection
    ) {
        $this->email = $email;
        $this->form = $form;
        $this->formRedirection = $formRedirection;
    }

    public function execute()
    {
        if ($this->form->isNotFilled()) {
            $this->formRedirection->backToFormPage();
            return;
        }

        $sendingSucceeded = $this->email->send(
            $this->form->fields()
        );

        $this->redirect($sendingSucceeded);
    }

    private function redirect($sendingSucceeded)
    {
        if ($sendingSucceeded) {
            $this->formRedirection->toSuccessPage();
        } else {
            $this->formRedirection->toFailPage();
        }
    }
}