Ticket.php

<?php

namespace Foggyline\Helpdesk\Controller;

abstract class Ticket extends \Magento\Framework\App\Action\Action
{
    /**
     * Customer session
     *
     * @var \Magento\Customer\Model\Session
     */
    protected $customerSession;

    /**
     * @param \Magento\Framework\App\Action\Context $context
     * @param \Magento\Customer\Model\Session $customerSession
     * @param \Magento\Framework\View\Result\PageFactory $resultPageFactory
     */
    public function __construct(
        \Magento\Framework\App\Action\Context $context,
        \Magento\Customer\Model\Session $customerSession
    )
    {
        $this->customerSession = $customerSession;
        parent::__construct($context);
    }

    /**
     * Check customer authentication for some actions
     *
     * @param \Magento\Framework\App\RequestInterface $request
     * @return \Magento\Framework\App\ResponseInterface
     */
    public function dispatch(\Magento\Framework\App\RequestInterface $request)
    {
        if (!$this->customerSession->authenticate()) {
            $this->_actionFlag->set('', 'no-dispatch', true);
            if (!$this->customerSession->getBeforeUrl()) {
                $this->customerSession->setBeforeUrl($this->_redirect->getRefererUrl());
            }
        }
        return parent::dispatch($request);
    }
}