Method getAttributes

/**
 * Get the attributes array.
 *
 * @param   array|\stdClass|CMSObject  $post    The data container
 * @param   array|null                 $fields  The requested fields to be rendered
 *
 * @return  array
 *
 * @since   4.0.0
 */
public function getAttributes($post, array $fields = null)
{
    if (!$post instanceof \stdClass && !\is_array($post) && !$post instanceof CMSObject) {
        $message = sprintf('Invalid argument for %s. Expected array or %s. Got %s', static::class, CMSObject::class, \gettype($post));
        throw new \InvalidArgumentException($message);
    }
    // The response from a standard ListModel query
    if ($post instanceof \stdClass) {
        $post = (array) $post;
    }
    // The response from a standard AdminModel query also works for Table which extends CMSObject
    if ($post instanceof CMSObject) {
        $post = $post->getProperties();
    }
    $event = new Events\OnGetApiAttributes('onGetApiAttributes', ['attributes' => $post, 'context' => $this->type]);
    /** @var Events\OnGetApiAttributes $eventResult */
    $eventResult = Factory::getApplication()->getDispatcher()->dispatch('onGetApiAttributes', $event);
    $combinedData = array_merge($post, $eventResult->getAttributes());
    return \is_array($fields) ? array_intersect_key($combinedData, array_flip($fields)) : $combinedData;
}