/**
* Validates input date.
*/
function hook_date_restrictions_element_validate($date, $element, $form_state, $form)
{
$min = new DateObject();
interval_apply_interval($min, $element['#restrictions']['date_min']);
if ($date < $min) {
return form_error($element, t('Invalid date.'));
}
}
/**
* Implements hook_commerce_node_checkout_line_item_alter
*
* Allows modules to interact with the line item to be added to the cart
* before it is saved. Modules can't use hook_commerce_line_item_alter or
* other entity alter functions because they don't have the $node object or
* the associated (selected) product in scope which this hook does.
*
* @param object $line_item
* The commerce line item about to be added to the cart
* @param object $product
* The commerce product option selection by the node author
* @param object $node
* The node object created by the author
*/
function hook_commerce_node_checkout_line_item_alter(&$line_item, $product, $node)
{
// Load the interval field from the product.
$interval = field_get_items('commerce_product', $product, 'commerce_node_checkout_expire');
if ($interval && !empty($interval['0'])) {
// We have an expiry field - apply it.
$due_date_obj = new DateObject('now');
if (interval_apply_interval($due_date_obj, $interval)) {
// Update the expiry field on the line item.
$line_item->commerce_node_checkout_expires[LANGUAGE_NONE][0]['value'] = $due_date_obj->format('U');
}
}
}