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<?php
# Movable Type (r) Open Source (C) 2001-2008 Six Apart, Ltd.
# This program is distributed under the terms of the
# GNU General Public License, version 2.
#
# $Id$
function smarty_modifier_nofollowfy($str, $arg = 1) {
# manipulate hyperlinks in $str...
if (!isset($str)) return $str;
if (!$arg) return $str;
global $mt;
$ctx =& $mt->context();
$blog = $ctx->stash('blog');
if (!$blog['blog_nofollow_urls'])
return $str;
$arg = strtolower($arg);
if ($arg == 'mtcommentbody' || $arg == 'mtcommentauthorlink' || $arg == 'mtcommenturl') {
$comment = $ctx->stash('comment');
if ($comment['comment_commenter_id']) {
// is an authenticated comment
$auth = $ctx->mt->db->fetch_author($comment['comment_commenter_id']);
if ($auth && $blog['blog_follow_auth_links'])
return $str;
}
}
return preg_replace_callback('#<a\s([^>]*\s*href\s*=[^>]*)>#i', 'nofollowfy_cb', $str);
}
function nofollowfy_cb($matches) {
$str = $matches[1];
preg_match_all('/[^=[:space:]]*\s*=\s*"[^"]*"|[^=[:space:]]*\s*=\s*\'[^\']*\'|[^=[:space:]]*\s*=[^[:space:]]*/', $str, $attr);
$rel_arr = preg_grep('/^rel\s*=/i', $attr[0]);
$attr = array_diff($attr[0], $rel_arr);
if (count($rel_arr) > 0)
$rel = array_pop($rel_arr);
if ($rel) {
$rel = preg_replace('/ ?\bnofollow\b ?/', ' ', $rel);
$rel = preg_replace('/^(rel\s*=\s*[\'"]?) ?/i', '\1nofollow ', $rel);
} else {
$rel = 'rel="nofollow"';
}
return '<a ' . join(' ', $attr) . ' ' . $rel . '>';
}
?>
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