<?php
// $Id: node_field_indexer.module,v 1.3 2010-03-12 17:44:49 davidlesieur Exp $

/**
 * @file
 * Exposes core node data for indexing into the search index.
 */

/**
 * Implementation of hook_field_indexer_list().
 *
 * @return
 *   An array describing the fields, each field being represented by an array
 *   with the following attributes:
 *   - name: Machine name or id of the field.
 *   - extra_name: Extra field name or id information.
 *   - label: Printable name of the field.
 *   - help: Optional info that may help in identifying the field.
 */
function node_field_indexer_field_indexer_list() {
  // Node title.
  $fields[] = array(
    'namespace' => 'node',
    'name' => 'title',
    'extra_name' => '',
    'label' => 'Title',
    'help' => '',
  );
  // TODO: Node author.
  return $fields;
}

/**
 * Implementation of hook_nodeapi().
 *
 * This is used to add our own entries to the search index. Using nodeapi's
 * update index operation is convenient, since the node module already handles
 * the logic for determining which nodes need indexing.
 */
function node_field_indexer_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
  static $fields = NULL;
  if ($op == 'update index') {
    if (!isset($fields)) {
      $fields = field_indexer_load_fields(TRUE, 'node');
    }
    foreach ($fields as $field) {
      $value = '';
      switch ($field['name']) {
        case 'title':
          if (isset($node->title)) {
            $value = check_plain($node->title);
          }
          break;
      }
      if (trim($value) != '') {
        field_indexer_index($node->nid, $field['fiid'], $value);
      }
    }
  }
}