function commerce_cart_add_to_cart_form_submit in Commerce Core 7

Form submit handler: add the selected product to the cart.

1 string reference to 'commerce_cart_add_to_cart_form_submit'

commerce_cart_add_to_cart_form in modules/cart/commerce_cart.module

Builds an Add to Cart form for a set of products.

File

modules/cart/commerce_cart.module, line 2524

Implements the shopping cart system and add to cart features.

Code

function commerce_cart_add_to_cart_form_submit($form, &$form_state) {
  $product_id = $form_state['values']['product_id'];
  $product = commerce_product_load($product_id);

  // If the line item passed to the function is new...
  if (empty($form_state['line_item']->line_item_id)) {

    // Create the new product line item of the same type.
    $line_item = commerce_product_line_item_new($product, $form_state['values']['quantity'], 0, $form_state['line_item']->data, $form_state['line_item']->type);

    // Allow modules to prepare this as necessary. This hook is defined by the
    // Product Pricing module.
    drupal_alter('commerce_product_calculate_sell_price_line_item', $line_item);

    // Remove line item field values the user didn't have access to modify.
    foreach ($form_state['values']['line_item_fields'] as $field_name => $value) {

      // Note that we're checking the Commerce Cart settings that we inserted
      // into this form element array back when we built the form. This means a
      // module wanting to alter a line item field widget to be available must
      // update both its form element's #access value and the field_access value
      // of the #commerce_cart_settings array.
      if (empty($form['line_item_fields'][$field_name]['#commerce_cart_settings']['field_access'])) {
        unset($form_state['values']['line_item_fields'][$field_name]);
      }
    }

    // Unset the line item field values array if it is now empty.
    if (empty($form_state['values']['line_item_fields'])) {
      unset($form_state['values']['line_item_fields']);
    }

    // Add field data to the line item.
    field_attach_submit('commerce_line_item', $line_item, $form['line_item_fields'], $form_state);

    // Process the unit price through the sell price calculation callback
    // so it reflects the user's actual current purchase price.
    commerce_product_pricing_invoke($line_item);

    // Only attempt an Add to Cart if the line item has a valid unit price.
    $line_item_wrapper = entity_metadata_wrapper('commerce_line_item', $line_item);
    if (!is_null($line_item_wrapper->commerce_unit_price
      ->value())) {

      // Add the product to the specified shopping cart.
      $form_state['line_item'] = commerce_cart_product_add($form_state['values']['uid'], $line_item, isset($line_item->data['context']['add_to_cart_combine']) ? $line_item->data['context']['add_to_cart_combine'] : TRUE);
    }
    else {
      drupal_set_message(t('%title could not be added to your cart.', array(
        '%title' => $product->title,
      )), 'error');
    }
  }
}