function commerce_coupon_handler_area_cart_form_validate in Commerce Coupon 7.2

Same name and namespace in other branches

1. 7 includes/views/handlers/commerce_coupon_handler_area_cart_form.inc \commerce_coupon_handler_area_cart_form_validate()

Validate: function commerce_coupon_handler_area_cart_form

1 string reference to 'commerce_coupon_handler_area_cart_form_validate'

commerce_coupon_handler_area_cart_form::views_form in includes/views/handlers/commerce_coupon_handler_area_cart_form.inc

File

includes/views/handlers/commerce_coupon_handler_area_cart_form.inc, line 138

Display a commerce coupon form field on the cart form.

Code

function commerce_coupon_handler_area_cart_form_validate($form, $form_state) {

  // Get the form and values for the coupon form.
  $coupon_array_parents = array_slice($form_state['triggering_element']['#array_parents'], 0, -1);
  $coupon_parents = array_slice($form_state['triggering_element']['#parents'], 0, -1);
  $coupon_values = drupal_array_get_nested_value($form_state['values'], $coupon_parents);
  $coupon_form = drupal_array_get_nested_value($form, $coupon_array_parents);
  $coupon_code = $coupon_values['coupon_code'];
  $order = $form_state['order'];
  $error = '';

  // No code provided
  if (empty($coupon_code)) {
    $error = t('Please enter a coupon code.');
  }
  else {

    // Check if the coupon code has already been applied.
    $coupon = commerce_coupon_load_by_code($coupon_code);
    if (empty($coupon)) {
      $error = t('Please enter a valid coupon code.');
    }
    else {

      // The same coupon cannot be added twice.
      $order_wrapper = entity_metadata_wrapper('commerce_order', $order);
      foreach ($order_wrapper->commerce_coupons as $order_coupon_wrapper) {
        if ($order_coupon_wrapper->coupon_id
          ->value() == $coupon->coupon_id) {
          $error = t('The coupon you have entered has already been applied to your order');
        }
      }
    }
  }

  // If a coupon was invalidated during the cart refresh (e.g. if its
  // discounts failed their conditions), an error message will have been
  // set.
  if (empty($error)) {
    $error =& drupal_static('commerce_coupon_error_' . strtolower($coupon_code));
  }

  // If we have errors set the form error.
  if (!empty($error)) {
    form_set_error(implode('][', $coupon_form['coupon_code']['#parents']), $error);
  }
}