<?php
// $Id: views_handler_filter_node_access.inc,v 1.2 2009/09/15 22:08:42 merlinofchaos Exp $
/**
 * Filter by node_access records.
 */
class views_handler_filter_node_access extends views_handler_filter_many_to_one {
  function __construct() {
    //$this->value_form_type = 'checkbox';
  }

  function can_expose() {
    return FALSE;
  }


  function get_value_options() {
     $this->value_options = array(
      'view' => 'View',
      'update' => 'Edit',
      'delete' => 'Delete',
    );
  }

  /**
   * See _node_access_where_sql() for a non-views query based implementation.
   */
  function query() {
    if (!user_access('administer nodes')) {
      $table = $this->ensure_my_table();
      $grants = array();
      foreach($this->value as $access) {
        foreach (node_access_grants($access) as $realm => $gids) {
          foreach ($gids as $gid) {
            $grants[] = "($table.gid = $gid AND $table.realm = '$realm')";
          }
        }
      }
      $grants_sql = '';
      if (count($grants)) {
        $grants_sql = implode(' OR ', $grants);
      }
      $this->query->add_where('AND', $grants_sql);

      $grants = array();
      foreach($this->value as $access)
        $grants[] = "$table.grant_$access >= 1";
      $grants_sql = '';
      if(count($grants)) {
        $op = strtoupper($this->operator);
        if ($op == 'NOT')
          $op = 'AND NOT';
        $grants_sql = implode(" $op ", $grants);
      }
      $this->query->add_where('AND', $grants_sql);

      $this->query->add_groupby('nid');
    }
  }
}