Cart Handler

cartHandler.php

<?php

public function storeInSession()
    {
        if (! $this->session->isStarted()) {
            $this->session->start();
            $this->initializeCart($this->session);
        } else {
            if (! $this->session->has('cart')) {
                $this->initializeCart($this->session);
            }
        }

        /** @var Cart $cart */
        $cart = unserialize($this->session->get('cart'));

        $cart = $this->addSessionItem($cart);

        $cart = serialize($cart);

        $this->session->set('cart', $cart);

    }