def format_element(bfo):
    """
    Creates a navigation for comments.
    """

    # get variables
    this_recid = bfo.control_field('001')
    try:
        this_content = bfo.fields('520__a')[0]
    except:
        return ""
    try:
        this_author = bfo.fields('100__a')[0]
    except:
        return ""

    this_limit_content = get_contextual_content(this_content,
                                                [],
                                                max_lines=2)[0]
    menu_recids = []
    current_language = bfo.lang

    post_recid = get_parent_post(this_recid)

    menu_recids = get_comments(post_recid, newest_first=True)

    try:
        menu_out = '<h4>%s</h4>' % cfg_messages["in_issue"][current_language]
    except:
        menu_out = '<h4>%s</h4>' % cfg_messages["in_issue"]['en']

    for recid in menu_recids:
        if str(this_recid) == str(recid):
            menu_out += '<div class="active"><div class="litem"><b>%s</b>: %s [...]</div></div>' % (this_author, this_limit_content)
        else:
            temp_rec = BibFormatObject(recid)
            content = temp_rec.fields('520__a')[0]
            limit_content = get_contextual_content(content,
                                                   [],
                                                   max_lines=1)[0]

            try:
                author = temp_rec.fields('100__a')[0]
            except:
                author = 'Anonymous'
            menu_out += '<div class="litem"><a href="%s/record/%s%s"><b>%s</b>: %s [...]</a></div>' % (CFG_SITE_URL,
                                                                                                recid,
                                                                                                (bfo.lang=="fr") and "?ln=fr" or "?ln=en",
                                                                                                author, limit_content)
            

        
    return menu_out
def format_element(bfo):
    """
    Displays comments on a post
    """

    this_recid = bfo.control_field('001')
    current_language = bfo.lang
    post_comments_recids = get_comments(this_recid, newest_first=True)
    out = ""
    if post_comments_recids:
        # let's print just the 3 latest posts
        latest_post_comments_recids = post_comments_recids[:2]
        out += "<h4>%s</h4>" % cfg_messages["in_issue"][current_language]

        for comment_recid in latest_post_comments_recids:
            out += print_record(comment_recid, format='hb')
            out += "<br />"

        all_comments = ""
        all_post_comments_recids = post_comments_recids[2:]
        for comment_recid in all_post_comments_recids:
            all_comments += print_record(comment_recid, format='hb')
            all_comments += "<br />"

        out += """
            <script type="text/javascript">
            function displayAllComments(){
                var all_comments = document.getElementById('all_comments');
                var see_all_link = document.getElementById('see_all_link');
                if (all_comments.style.display == 'none'){
                    all_comments.style.display = '';
                    see_all_link.innerHTML = "Show less comments"
                } else {
                    all_comments.style.display = 'none';
                    see_all_link.innerHTML = "Show all comments"
                }
            }
            </script>
            """

        out += '<span id="all_comments" style="">' + all_comments + '</span>'
        out += '<a class="moreinfo" id="see_all_link" \
                href="javascript:void(0)" onclick="displayAllComments()""></a>'
        out += '<script type="text/javascript">displayAllComments()</script>'

    return out