Craft Commerce Cart

[mikedaviesweb]

I'm wanting to use Element API with Craft Commerce, retrieving products is no problem, however I'm unsure how to get whats currently in the cart.

use craft\commerce\elements\Order;

'api/order.json' => function() {
    return [
        'elementType' => Order::class,
        // 'criteria' => ['' => ''],
        'transformer' => function(Order $entry) {
            return [
                'id' => $entry->id,
                'title' => $entry->title
            ];
        },
    ];
},

Any help would be much appreciated.