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<?php
// define('BANNER_CT_NAME', 'banner');

/**
 * Implement hook_node_presave()
 **/
function the_aim_custom_node_presave($node) {
  if($node->type === 'product_display') {
    if($node->title === '<autogenerate-title>') {
      // Set the title based on the value of the fields from the entity.
      if(isset($node->field_brand)) {
        $brands = field_get_items('node', $node, 'field_brand');
        $brand = array_shift($brands);
      }
      if(isset($node->field_year)) {
        $years = field_get_items('node', $node, 'field_year');
        $year = array_shift($years);
      }
      if(isset($brand['name']) && isset($year['name'])) {
        $node->title = $brand['name'] . ' ' . $year['name'];
        return $node;
      }
    }
  }
}

/**
 * Implement hook_form_alter().
 **/
function the_aim_custom_form_alter(&$form, &$form_state, $form_id) {
  if($form_id === 'product_display_node_form') {
    if(!isset($form_state['build_info']['args'][0]->nid)) {
      $form['title']['#default_value'] = '<autogenerate-title>';
      $form['title']['#type'] = 'hidden';
    }
  }
}

/**
 * Implements hook_entity_info_alter().
 */
function the_aim_custom_entity_info_alter(&$entity_info) {
  if (isset($entity_info['commerce_product'])) {
    $entity_info['commerce_product']['inline entity form'] = array(
      'controller' => 'CustomCommerceProductInlineEntityFormController',
    );
  }
}

class CustomCommerceProductInlineEntityFormController extends CommerceProductInlineEntityFormController {
  /**
   * Overrides CommerceProductInlineEntityFormController::save().
   *
   * Autogenerates the product title if specified, and then saves the product.
   */
  public function save($entity, $context) {
    // Remove the temporary message added in entityFormSubmit() so that
    // Commerce AutoSKU can do its thing.
    if (!empty($entity->_remove_sku)) {
      $entity->sku = NULL;
      unset($entity->_remove_sku);
    }

    // Generate the product title. Take the parent entity title as the base.
    if ($this->settings['autogenerate_title']) {
      $entity->title = entity_label($context['parent_entity_type'], $context['parent_entity']);
      if($entity->title === '<autogenerate-title>') {
        // Set the title based on the value of the fields from the entity.
        if(isset($context['parent_entity']->field_brand)) {
          $brands = field_get_items($context['parent_entity_type'], $context['parent_entity'], 'field_brand');
          $brand = array_shift($brands);
        }
        if(isset($context['parent_entity']->field_year)) {
          $years = field_get_items($context['parent_entity_type'], $context['parent_entity'], 'field_year');
          $year = array_shift($years);
        }
        if(isset($brand['name']) && isset($year['name'])) {
          $entity->title = $brand['name'] . ' ' . $year['name'];
        }
      }
      $attributes = $this->attributes($entity->type);
      if (!empty($attributes)) {
        $wrapper = entity_metadata_wrapper('commerce_product', $entity);
        $attribute_values = array();
        foreach ($attributes as $field_name => $attribute) {
          $attribute_label = $wrapper->{$field_name}->label();
          if (!empty($attribute_label)) {
            $attribute_values[] = $attribute_label;
          }
        }

        if (!empty($attribute_values)) {
          $entity->title .= ' (' . implode(', ', $attribute_values) . ')';
        }
      }
    }

    entity_save('commerce_product', $entity);
  }
}