How can I get the current user who purchased a product from the onOrderComplete event?

Question

I have a plugin that is listening to the onOrderComplete event within commerce. I am able to get the email address like this:

craft()->on('commerce_orders.onOrderComplete', function (Event $event) {
    $event->params['order']->email;  // [email protected]

});

I can see the Id in the log, but since I'm in the order class, I'm not sure how to get to it. I can see customerId:

$event->params['order']->customerId; // 3

But I've noticed the customerId and the userId are different. I need to be able to get the logged in userId vs. the customerId

When I try getting just the id, I get the product id back (Which is what I would expect).

$event->params['order']->id;  // 123

To relate to the twig side it would be something like this (obviously won't work):

$event->params['order']['currentUser']->id;  // 12

Here is a part of the log:

...
[_attributes:Craft\BaseModel:private] => Array
(
    [enabled] => 1
    [archived] => 0
    [locale] => en_us
    [localeEnabled] => 1
    [itemTotal] => 375
    [baseDiscount] => 0
    [baseShippingCost] => 0
    [totalPrice] => 375
    [totalPaid] => 375.00
    [billingAddressId] => 122
    [shippingAddressId] => 123
    [paymentMethodId] => 1
    [customerId] => 3
    [id] => 12   //  <-- This guy right here
    [orderStatusId] => 1
...

Answer 1

Since this is happening from the onOrderComplete event, the easiest way to get the currently logged in user is with UserSessionService::getUser():

$user = craft()->userSession->getUser();

Alternatively, if you want to go through the actual Commerce_OrderModel that was passed as a parameter on the event, you can do this:

$user = $event->params['order']->getCustomer()->getUser();

Either way, it’s a good idea to verify that $user gets set to something, just in case:

if ($user) {
    // ...
}