/**
  * Implements LinkitSearchPluginInterface::fetchResults().
  */
 public function fetchResults($search_string)
 {
     // If the $search_string is not a string, something is wrong and an empty
     // array is returned.
     $matches = array();
     // Get the EntityFieldQuery instance.
     $this->getQueryInstance();
     $or = db_or();
     $or->condition('n.title', '%' . db_like($search_string) . '%', 'LIKE');
     $or->condition('bcd.name', '%' . db_like($search_string) . '%', 'LIKE');
     $or->condition('b.biblio_secondary_title', '%' . db_like($search_string) . '%', 'LIKE');
     $or->condition('bkd.word', '%' . db_like($search_string) . '%', 'LIKE');
     $this->query->condition($or);
     $this->query->orderBy('b.biblio_year', 'DESC');
     //ORDER BY created
     // Add the search condition to the query object.
     /*$this->query->propertyCondition($this->entity_field_label,
           '%' . db_like($search_string) . '%', 'LIKE')
       ->addTag('linkit_entity_autocomplete')
       ->addTag('linkit_' . $this->plugin['entity_type'] . '_autocomplete');*/
     /*
     $matches[] = array(
         'title' => $this->entity_field_label,
         'description' => '',
         'path' => '',
         'group' => '',
         'addClass' => '',
     );
     return $matches;
     */
     /*    // Add access tag for the query.
         // There is also a runtime access check that uses entity_access().
         $this->query->addTag($this->plugin['entity_type'] . '_access');
     
         // Bundle check.
         if (isset($this->entity_key_bundle) && isset($this->conf['bundles']) ) {
           $bundles = array_filter($this->conf['bundles']);
           if ($bundles) {
             $this->query->propertyCondition($this->entity_key_bundle, $bundles, 'IN');
           }
         }*/
     // Execute the query.
     $result = $this->query->execute()->fetchAllAssoc('nid');
     /*if (!isset($result[$this->plugin['entity_type']])) {
         return array();
       }*/
     $ids = array_keys($result);
     // Load all the entities with all the ids we got.
     $entities = entity_load('node', $ids);
     foreach ($entities as $key => $entity) {
         // Check the access againt the definded entity access callback.
         if (entity_access('view', 'node', $entity) === FALSE) {
             continue;
         }
         $matches[] = array('title' => biblio_remove_brace($this->createLabel($entity)), 'description' => $this->createDescription($entity) . ' <span class="name">' . $result[$key]->name . '</span>  <span class="year">' . $result[$key]->biblio_year . '</span>', 'path' => $this->createPath($entity), 'group' => $this->createGroup($entity), 'addClass' => $this->createRowClass($entity));
     }
     return $matches;
 }

 /**
  * Implements EditEntityFieldAccessCheckInterface::accessEditEntityField().
  */
 public function accessEditEntityField($entity_type, $entity, $field_name)
 {
     $is_extra_field = _quickedit_is_extra_field($entity_type, $field_name);
     $entity_access = entity_access('update', $entity_type, $entity);
     $field_access = $is_extra_field ? TRUE : field_access('edit', $field_name, $entity_type, $entity);
     return $entity_access && $field_access;
 }

 /**
  * Page callback; Displays a listing of subqueues for a queue.
  */
 public function subqueues_page($js, $input, EntityQueue $queue)
 {
     $plugin = $this->plugin;
     drupal_set_title($this->get_page_title('subqueues', $queue));
     _entityqueue_set_breadcrumb();
     $header = array(array('data' => t('Id'), 'type' => 'property', 'specifier' => 'subqueue_id', 'class' => array('entityqueue-ui-subqueue-id')), array('data' => t('Subqueue'), 'type' => 'property', 'specifier' => 'label', 'class' => array('entityqueue-ui-subqueue-label')), array('data' => t('Operations'), 'class' => array('entityqueue-ui-subqueue-operations')));
     $query = new EntityFieldQuery();
     $query->entityCondition('entity_type', $this->entityType);
     $query->entityCondition('bundle', $queue->name);
     $query->pager(50);
     $query->tableSort($header);
     $results = $query->execute();
     $ids = isset($results[$this->entityType]) ? array_keys($results[$this->entityType]) : array();
     $subqueues = $ids ? entity_load($this->entityType, $ids) : array();
     $rows = array();
     foreach ($subqueues as $subqueue) {
         $ops = array();
         if (entity_access('update', 'entityqueue_subqueue', $subqueue)) {
             $edit_op = str_replace('%entityqueue_subqueue', $subqueue->subqueue_id, ctools_export_ui_plugin_menu_path($plugin, 'edit subqueue', $queue->name));
             $ops[] = l(t('edit items'), $edit_op);
         }
         if (entity_access('delete', 'entityqueue_subqueue', $subqueue)) {
             $delete_op = str_replace('%entityqueue_subqueue', $subqueue->subqueue_id, ctools_export_ui_plugin_menu_path($plugin, 'delete subqueue', $queue->name));
             $ops[] = l(t('delete subqueue'), $delete_op);
         }
         $rows[] = array('data' => array(array('data' => $subqueue->subqueue_id, 'class' => array('entityqueue-ui-subqueue-id')), array('data' => filter_xss_admin($subqueue->label), 'class' => array('entityqueue-ui-subqueue-label')), array('data' => implode(' | ', $ops), 'class' => array('entityqueue-ui-subqueue-operations'))));
     }
     $render = array('table' => array('#theme' => 'table', '#header' => $header, '#rows' => $rows, '#empty' => t('There are no subqueues to display.')), 'pager' => array('#theme' => 'pager'));
     return $render;
 }

/**
 * Check view and edit permissions.
 *
 * @param $op
 *   The type of operation. Either 'view' or 'edit'.
 */
function have_access($op)
{
    global $user;
    $db = DBConnection::instance();
    $field_id = (int) _post('fid');
    if (!$field_id) {
        $field_id = (int) _get('fid');
    }
    $field = (object) $db->dq("SELECT entity_id, entity_type, delta FROM {mytinytodo_fields} WHERE id = ?", $field_id)->fetch_assoc();
    $field_info = field_info_field_by_id($field->delta);
    if ($field->entity_type == 'node') {
        if (!($node = node_load($field->entity_id))) {
            return false;
        }
        $node_access = $op == 'edit' ? 'update' : $op;
        if (node_access($node_access, $node, $user) && field_access($op, $field_info, $field->entity_type, $node, $user)) {
            return true;
        }
    } else {
        if ($field->entity_type == 'user') {
            if (!($account = user_load($field->entity_id))) {
                return false;
            }
            if (field_access($op, $field_info, $field->entity_type, $account, $user)) {
                return true;
            }
        } else {
            if ($field->entity_type == 'comment') {
                if (!($comment = comment_load($field->entity_id))) {
                    return false;
                }
                if ($op == 'view' && !user_access('access comments')) {
                    return false;
                } else {
                    if ($op == 'edit' && !comment_access($op, $comment)) {
                        return false;
                    }
                }
                if (field_access($op, $field_info, $field->entity_type, $comment, $user)) {
                    return true;
                }
            } else {
                if (module_exists('entity')) {
                    if (!($entity = entity_load($field_id))) {
                        return false;
                    }
                    $entity_access = $op == 'edit' ? 'update' : $op;
                    if (entity_access($entity_access, $field->entity_type, $entity, $user) && field_access($op, $field_info, $field->entity_type, $entity, $user)) {
                        return true;
                    }
                }
            }
        }
    }
    return false;
}

 /**
  * Implements EntityReferenceHandler::getLabel().
  */
 public function getLabel($entity)
 {
     return entity_access('view', 'node', $entity) ? entity_label('node', $entity) : t('- Restricted access -');
 }

 /**
  * Implements EntityReferenceHandler::getLabel().
  */
 public function getLabel($entity)
 {
     $target_type = $this->field['settings']['target_type'];
     return entity_access('view', $target_type, $entity) ? entity_label($target_type, $entity) : t('- Restricted access -');
 }

 /**
  * The autocomplete callback function for the Linkit Entity plugin.
  *
  * @return
  *   An associative array whose values are an
  *   associative array containing:
  *   - title: A string to use as the search result label.
  *   - description: (optional) A string with additional information about the
  *     result item.
  *   - path: The URL to the item.
  *   - group: (optional) A string with the group name for the result item.
  *     Best practice is to use the plugin name as group name.
  *   - addClass: (optional) A string with classes to add to the result row.
  */
 function autocomplete_callback()
 {
     $matches = array();
     // Get the EntityFieldQuery instance.
     $this->getQueryInstance();
     // Add the search condition to the query object.
     $this->query->propertyCondition($this->entity_field_label, '%' . db_like($this->search_string) . '%', 'LIKE')->addTag('linkit_entity_autocomplete')->addTag('linkit_' . $this->plugin['entity_type'] . '_autocomplete');
     // Add access tag for the query.
     // There is also a runtime access check that uses entity_access().
     $this->query->addTag($this->plugin['entity_type'] . '_access');
     // Bundle check.
     if (isset($this->entity_key_bundle) && isset($this->conf['bundles'])) {
         if ($bundles = array_filter($this->conf['bundles'])) {
             $this->query->propertyCondition($this->entity_key_bundle, $bundles, 'IN');
         }
     }
     // Execute the query.
     $result = $this->query->execute();
     if (!isset($result[$this->plugin['entity_type']])) {
         return array();
     }
     $ids = array_keys($result[$this->plugin['entity_type']]);
     // Load all the entities with all the ids we got.
     $entities = entity_load($this->plugin['entity_type'], $ids);
     foreach ($entities as $entity) {
         // Check the access againt the definded entity access callback.
         if (entity_access('view', $this->plugin['entity_type'], $entity) === FALSE) {
             continue;
         }
         $matches[] = array('title' => $this->buildLabel($entity), 'description' => $this->buildDescription($entity), 'path' => $this->buildPath($entity), 'group' => $this->buildGroup($entity), 'addClass' => $this->buildRowClass($entity));
     }
     return $matches;
 }

 /**
  * Check access to CRUD an entity.
  *
  * @param string $op
  *   The operation. Allowed values are "create", "update" and "delete".
  * @param string $entity_type
  *   The entity type.
  * @param object $entity
  *   The entity object.
  *
  * @return bool
  *   TRUE or FALSE based on the access. If no access is known about the entity
  *   return NULL.
  */
 protected function checkEntityAccess($op, $entity_type, $entity)
 {
     $account = $this->getAccount();
     return entity_access($op, $entity_type, $entity, $account);
 }

 /**
  * {@inheritdoc}
  */
 public function entity_access($op, $entity)
 {
     return entity_access($op, $this->entity_type, $entity);
 }

 /**
  * Implements LinkitSearchPluginInterface::fetchResults().
  */
 public function fetchResults($search_string)
 {
     // If the $search_string is not a string, something is wrong and an empty
     // array is returned.
     $matches = array();
     // Get the EntityFieldQuery instance.
     $this->getQueryInstance();
     // Add the search condition to the query object.
     $this->query->propertyCondition($this->entity_field_label, '%' . db_like($search_string) . '%', 'LIKE')->addTag('linkit_entity_autocomplete')->addTag('linkit_' . $this->plugin['entity_type'] . '_autocomplete');
     /*
      * DEBUGGING
      * to search a biblio node using author name 
      * search must include tables biblio_contributor_data & biblio_contributor & (biblio or node)
      * EntityFieldQuery cannot support current requirement
      * implement plain query execution and return results in the format of EntityFieldQuery ($this->query->execute() & $matches)
      * e.g. (biblio.pages.inc)
      * $db_result = db_query('SELECT bd.cid, bd.drupal_uid, bd.name, bd.lastname,
                                     bd.firstname, bd.prefix, bd.suffix,
                                     bd.initials, bd.affiliation, bd.md5, bd.literal,
                                     COUNT(*) AS cnt
                                 FROM {biblio_contributor} b
                                      LEFT JOIN {biblio_contributor_data} bd ON b.cid = bd.cid
                                      INNER JOIN {node} n on n.vid = b.vid
                                 ' . $where_clause . '
                                 GROUP BY bd.cid, bd.drupal_uid, bd.name, bd.lastname,
                                          bd.firstname, bd.prefix, bd.suffix,
                                          bd.initials, bd.affiliation, bd.md5, bd.literal
                                 ORDER BY  lastname ASC, SUBSTRING(firstname,1,1) ASC,
                                 initials ASC', array(':filter' => $filter));
      * 
     $matches[] = array(
         'title' => $this->entity_field_label,
         'description' => '',
         'path' => '',
         'group' => '',
         'addClass' => '',
     );
     return $matches;
     */
     // Add access tag for the query.
     // There is also a runtime access check that uses entity_access().
     $this->query->addTag($this->plugin['entity_type'] . '_access');
     // Bundle check.
     if (isset($this->entity_key_bundle) && isset($this->conf['bundles'])) {
         $bundles = array_filter($this->conf['bundles']);
         if ($bundles) {
             $this->query->propertyCondition($this->entity_key_bundle, $bundles, 'IN');
         }
     }
     // Execute the query.
     $result = $this->query->execute();
     if (!isset($result[$this->plugin['entity_type']])) {
         return array();
     }
     $ids = array_keys($result[$this->plugin['entity_type']]);
     // Load all the entities with all the ids we got.
     $entities = entity_load($this->plugin['entity_type'], $ids);
     foreach ($entities as $entity) {
         // Check the access againt the definded entity access callback.
         if (entity_access('view', $this->plugin['entity_type'], $entity) === FALSE) {
             continue;
         }
         $matches[] = array('title' => $this->createLabel($entity), 'description' => $this->createDescription($entity), 'path' => $this->createPath($entity), 'group' => $this->createGroup($entity), 'addClass' => $this->createRowClass($entity));
     }
     return $matches;
 }

 /**
  * @see RestWSResourceControllerInterface::access()
  */
 public function access($op, $id)
 {
     // Check entity access on the original entity, not our API object (which
     // will fail).
     return entity_access($op, $this->entityType, isset($id) ? $this->originalWrapper($id)->value() : NULL);
 }

 /**
  * Whether user has access to update, view or delete the entity.
  *
  * @param string $op
  *   This can either be "update", "view" or "delete".
  *
  * @return bool
  *   TRUE if user has access and FALSE otherwise.
  */
 public function hasObjectAccess($op)
 {
     if (!in_array($op, array('update', 'view', 'delete'))) {
         return FALSE;
     }
     $entity_type = $this->getEntityType();
     if (module_exists('entity')) {
         return entity_access($op, $entity_type, $this->getEntity());
     } elseif ($entity_type == 'node') {
         return node_access($op, $this->getEntity());
     } elseif ($entity_type == 'comment' && $op == 'update') {
         return comment_access('edit', $this->getEntity());
     } elseif (($info = entity_get_info()) && isset($info[$entity_type]['access callback'])) {
         return $info[$entity_type]['access callback']($op, $this->getEntity(), NULL, $entity_type);
     }
     return FALSE;
 }

 /**
  * {@inheritdoc}
  */
 public function entityAccess($operation = 'view')
 {
     return entity_access($operation, $this->getType(), array($this->getEntity()));
 }

 /**
  * @deprecated Use the entity_is_public module instead.
  */
 public static function isPubliclyVisible($entity_type, $entity, array $options = array())
 {
     $options += array('needs alias' => FALSE);
     $uri = entity_uri($entity_type, $entity);
     if (empty($uri['path'])) {
         return FALSE;
     } elseif ($options['needs alias'] && !drupal_lookup_path('alias', $uri['path'], NULL)) {
         return FALSE;
     } elseif (module_exists('rabbit_hole') && rabbit_hole_get_action($entity_type, $entity) !== RABBIT_HOLE_DISPLAY_CONTENT) {
         return FALSE;
     } else {
         return entity_access('view', $entity_type, $entity, drupal_anonymous_user());
     }
 }