function commerce_pado_form_commerce_cart_add_to_cart_form_alter in Commerce Product Add-on 7

Implementation of hook_form_FORM_ID_alter().

File

./commerce_pado.module, line 95

Commerce Product Add On adds an option to entityreference fields that allows selected products to act as "add-ons" for the parent product.

Code

function commerce_pado_form_commerce_cart_add_to_cart_form_alter(&$form, &$form_state) {

  // If there are no available products currently, do not make any changes to the form.
  if (!empty($form_state['default_product'])) {

    // Get the correct product. If its the first form load, use the default product.
    if (empty($form_state['input']['product_id'])) {
      $product = $form_state['default_product'];
    }
    else {
      $product = commerce_product_load($form_state['input']['product_id']);
    }
    $product_wrapper = entity_metadata_wrapper('commerce_product', $product);

    // Does the product have an entityreference field with the Add On settings checked?
    $instances = field_info_instances('commerce_product', $product->type);
    $commerce_pado_settings = variable_get('commerce_pado_settings', array());
    $commerce_pado_products = array();

    // Loop through all fields on the product, and check the instance ID to see if
    // it is an entityreference field checked to be used as a product Add On.
    foreach ($instances as $field_name => $field_info) {
      if (!empty($commerce_pado_settings[$field_info['id']]) && $commerce_pado_settings[$field_info['id']] == 1 && !empty($product->{$field_name})) {
        $all_field_info = field_info_field($field_name);

        // If cardinality of the field does not equal one, loop through the values of the field and put the products in the array.
        if ($all_field_info['cardinality'] != 1) {
          foreach ($product_wrapper->{$field_name} as $field_value_wrapper) {
            $product_id = $field_value_wrapper->product_id
              ->value();
            $commerce_pado_products[$product_id] = $field_value_wrapper
              ->value();
          }
        }
        else {
          $product_id = $product_wrapper->{$field_name}->product_id
            ->value();
          $commerce_pado_products[$product_id] = $product_wrapper->{$field_name}
            ->value();
        }
        $form_state['commerce_pado_products'] = $commerce_pado_products;

        // Add an additional submit handler to execute
        if (!in_array('commerce_pado_add_to_cart_submit', $form['#submit'])) {
          $form['#submit'][] = 'commerce_pado_add_to_cart_submit';
        }
      }
    }
    global $language;
    foreach ($commerce_pado_products as $product_add_on) {

      // Get the renderable array for the product
      if ($product_add_on->status == 1) {
        $renderable_product = entity_view('commerce_product', array(
          $product_add_on->product_id => $product_add_on,
        ), 'commerce_pado', $language->language, TRUE);
        $form[$product_add_on->sku] = array(
          '#type' => 'checkbox',
          '#title' => drupal_render($renderable_product),
        );
      }
    }
  }
}