function foiagen_menu() {
$items['node/%node/foia-generator'] = array(
'title' => 'Foia Generator',
'description' => 'A foia generator form.',
'page callback' => 'drupal_get_form',
'page arguments' => array('foiagen_form', 1),
'access callback' => TRUE,
);
return $items;
}
function foiagen_form($form, &$form_state) {
$form['submit_button'] = array(
    '#type' => 'submit',
    '#value' => t('Generate FOIA'),
);
return $form;
}
function foiagen_form_submit($form, &$form_state) {
}

//Implement hook_path_alias_types().
function foiagen_path_alias_types() {
$objects = array();
$objects[foiagen_internal_path] = t('Foiagens');
return $objects;
}
//Implement hook_pathauto
function foiagen_pathauto($op) {
switch ($op) {
case 'settings':
  $settings = array();
  $settings['module'] = 'foiagen';
  $settings['token_type'] = 'node';
  $settings['groupheader'] = t('foiagen paths');
  $settings['patterndescr'] = t('Pattern for foiagen');
  $settings['patterndefault'] = 'schools/[node:title]/foiagenerator';
  $settings['batch_update_callback'] =
  'foiagen_pathauto_bulk_update_batch_process';
  return (object) $settings;
default:
break;
  }
}
//Batch processing callback; Generate aliases for subsites.
function foiagen_pathauto_bulk_update_batch_process(&$context) {
  if (!isset($context['sandbox']['current'])) {
  $context['sandbox']['count'] = 0;
  $context['sandbox']['current'] = 0;
  }
$query = db_select('node', 'n');
//$query->leftJoin('url_alias', 'ua', "CONCAT(foiagen_internal_path, n.nid) = ua.source");
$query->addField('n', 'nid');
//$query->isNull('ua.source');
$query->condition('n.nid', $context['sandbox']['current'], '>');
$query->orderBy('n.nid');
$query->addTag('pathauto_bulk_update');
$query->addMetaData('entity', 'node');
$query->fields('n', array('nid'));
// Get the total amount of items to process.
if (!isset($context['sandbox']['total'])) {
$context['sandbox']['total'] = $query->countQuery()->execute()->fetchField();
//If there are no nodes to update, the stop immediately.
if (!$context['sandbox']['total']) {
$context['finished'] = 1;
return;
}
}
$query->range(0, 25);
$nids = $query->execute()->fetchCol();
foiagen_update_alias_multiple($nids, 'bulkupdate');
$context['sandbox']['count'] += count($nids);
$context['sandbox']['current'] = max($nids);
$context['message'] = t('Updated foiagen alias for node @nid.', array('@nid' => end($nids)));
if ($context['sandbox']['count'] != $context['sandbox']['total']) {
$context['finished'] = $context['sandbox']['count'] / $context['sandbox'}['total'];
}
}