attempt to create EntityFieldQuery accounting for vsite

_os_node_query.php

<?php

/**
 * Returns a new EntityFieldQuery in the current space, if vsite is enabled.
 */
function _os_node_query($type = '') {
  // Prepares a new EntityFieldQuery for nodes.
  $query = new EntityFieldQuery();
  $query->entityCondition('entity_type', 'node');

  // Adds node type condition if given
  if (isset($type) && strlen($type) > 0) {
    dpm($type);
    $query->entityCondition('bundle', $type);
  }

  $query->propertyCondition('status', 1);

  // Returns if we are running a single-tenant installation.
  if (!module_exists('vsite')) {
    return $query;
  }

  // Returns if we cannot load the current space.
  $space = spaces_get_space();
  if (!is_numeric($space->id)) {
    return $query;
  }

  // Adds field condition for OG audience if available.
  $query->fieldCondition(OG_AUDIENCE_FIELD, 'target_id', $space->id);
  return $query;
}