hook_pathauto() replaced by hook_path_info()

function field_collection_pathauto($op) {
  if ('settings' === $op) {
    $settings = array();
    $settings['module'] = 'field_collection';
    $settings['token_type'] = 'field_collection_item';
    $settings['groupheader'] = t('Field collection item paths');
    $settings['patterndescr'] = t('Default path pattern (applies to all field collections with blank patterns below)');
    $settings['patterndefault'] = '';
    // @todo Implement bulk update:
    // $settings['batch_update_callback'] = 'field_collection_pathauto_bulk_update_batch_process';
    // $settings['batch_file'] = backdrop_get_path('module', 'field_collection') . '/field_collection.pathauto.inc';
    $settings['patternitems'] = array();
    $instances = field_info_instances();
    foreach ($instances as $entity_type => $type_bundles) {
      foreach ($type_bundles as $bundle => $bundle_instances) {
        foreach ($bundle_instances as $field_name => $instance) {
          $field = field_info_field($field_name);
          if ($field['type'] === 'field_collection') {
            // @todo We may need different patterns depending on the.
            // host entity type or the host bundle. If so we need to prefix
            // field-name with $entity_type . '_' . $bundle . '_' and also need
            // to implement our own version of pathauto_pattern_load_by_entity()
            // searching for the best matching pattern.
            $settings['patternitems'][$field_name] = t('Pattern for all field collection @field-collection paths', array('@field-collection' => $field_name));
          }
        }
      }
    }

    return (object) $settings;
  }
}

function field_collection_path_info() {
  $info['field_collection'] = array(
    'entity type' => 'field_collection',
    'label' => t('Field collection item paths'),
    'pattern description' => t('Default path pattern (applies to all field collections with blank patterns below)'),
    'pattern default' => '',
    'pattern items' => array(),
    'type delete callback' => '',
    'batch update callback' => '',
    'batch file' => '',
    'token_type' => 'field_collection_item'
  );

  $instances = field_info_instances();
  foreach ($instances as $entity_type => $type_bundles) {
    foreach ($type_bundles as $bundle => $bundle_instances) {
      foreach ($bundle_instances as $field_name => $instance) {
        $field = field_info_field($field_name);
        if ($field['type'] === 'field_collection') {
          $info['field_collection']['pattern items'][$field_name] = t('Pattern for all field collection @field-collection paths', array('@field-collection' => $field_name));
        }
      }
    }
  }

  return $info;
}