Using a helper to count items in an iterator

today the example is for a site that organizes web links and associates them with tags. In order to count the tags while listing data, we do something like this:

views/Link/Link-List.tmpl

<table>
  <tr>
    <th>URL</th>
    <th>Tags</th>
  </tr>

  <{ITERATOR links}>
  <tr>
    <td><{url}></td>
    <td>
        <{IF (LinkHelper::Count_tags_by_link_id(id) > 0)}>
        <{ITERATOR get_tags()}>
          <{name}><br />
        <{/ITERATOR}>
        <{ELSE}>
        (none)
        <{/IF}>
    </td>
  </tr>
  <{/ITERATOR}>
</table>

include/LinkHelper.class.php

public static function Count_tags_by_link_id( $link_id ) {

  FUSE::Require_model( 'Link' );
  
  $link = new Link();
  $link->id = $link_id;

  return $link->tags->count_all();
}

models/Link.class.php

public function get_tags() {
  return $this->tags->fetch_all();
}