<?php
# Movable Type (r) Open Source (C) 2001-2011 Six Apart, Ltd.
# This program is distributed under the terms of the
# GNU General Public License, version 2.
#
# $Id$

function smarty_function_mtcommentauthorlink($args, &$ctx) {
    $mt = MT::get_instance();
    $comment = $ctx->stash('comment');
    $name = $comment->comment_author;
    if (!$name && isset($args['default_name']))
        $name = $args['default_name'];
    $name or $name = $mt->translate("Anonymous");
    require_once "MTUtil.php";
    $name = encode_html( $name );
    $email = $comment->comment_email;
    $url = $comment->comment_url;
    if (isset($args['show_email']))
        $show_email = $args['show_email'];
    else
        $show_email = 0;
    if (isset($args['show_url']))
        $show_url = $args['show_url'];
    else
        $show_url = 1;
    $target = (isset($args['new_window']) && $args['new_window'])
        ? ' target="_blank"' : '';

    _comment_follow($args, $ctx);

    $cmntr = $ctx->stash('commenter');
    if (!isset($cmntr) && isset($comment->comment_commenter_id))
        $cmntr = $comment->commenter();

    if ( $cmntr ) {
        $name = isset($cmntr->author_nickname) ? encode_html( $cmntr->author_nickname ) : $name;
        if ($cmntr->author_url)
            return sprintf('<a title="%s" href="%s"%s>%s</a>', encode_html( $cmntr->author_url ), encode_html( $cmntr->author_url ), $target, $name);
        return $name;
    } elseif ($show_url && $url) {
        require_once "function.mtcgipath.php";
        $cgi_path = smarty_function_mtcgipath($args, $ctx);
        $comment_script = $ctx->mt->config('CommentScript');
        $name = strip_tags($name);
        $url = encode_html( strip_tags($url) );
        if ($comment->comment_id &&
            (!isset($args['no_redirect']) || (isset($args['no_redirect']) && !$args['no_redirect'])) &&
            (!isset($args['nofollowfy']) || (isset($args['nofollowfy']) && !$args['nofollowfy'])))
            return sprintf('<a title="%s" href="%s%s?__mode=red;id=%d"%s>%s</a>', $url, $cgi_path, $comment_script, $comment->comment_id, $target, $name);
        else
            return sprintf('<a title="%s" href="%s"%s>%s</a>', $url, $url, $target, $name);
    } elseif ($show_email && $email && is_valid_email($email)) {
        $email = encode_html( strip_tags($email) );
        $str = 'mailto:' . $email;
        if ($args['spam_protect']) {
            $str = spam_protect($str);
        }
        return sprintf('<a href="%s">%s</a>', $str, $name);
    }
    return $name;

}

function _comment_follow (&$args, $ctx) {
    $comment = $ctx->stash('comment');
    if (empty($comment))
        return;

    $blog = $ctx->stash('blog');
    $nofollow = false;
    if (!empty($blog) && $blog->blog_nofollow_urls) {
        if ($blog->blog_follow_auth_links) {
            $cmntr = $ctx->stash('commenter');
            if (!isset($cmntr) && isset($comment->comment_commenter_id)) {
                $cmntr = $comment->commenter();
                if (!empty($cmntr))
                    $ctx->stash('commenter', $cmntr);
            }
            if (empty($cmntr) || (!empty($cmntr) && !is_trusted($cmntr, $ctx, $blog->blog_id)))
                $nofollow = true;
        } else {
            $nofollow = true;
        }
    }
    if ($nofollow) {
        $curr_tag = $ctx->_tag_stack[count($ctx->_tag_stack) - 1];
        if ( isset($curr_tag[1]['nofollowfy']) )
            $args['nofollowfy'] = $curr_tag[1]['nofollowfy'];
        else
            $args['nofollowfy'] = "1";
    }
}

function is_trusted ($cmntr, $ctx, $blog_id) {
    if (empty($cmntr))
        return false;

    // commenter is superuser?
    $perms = $ctx->mt->db()->fetch_permission(array('blog_id' => 0, 'id' => $cmntr->author_id));
    if (!empty($perms)) {
        $perms = $perms[0];
        if (strstr($perms->permission_permissions, '\'administer\''))
            return true;
    }

    if (intval($ctx->mt->config('singlecommunity')))
        $blog_id = 0;

    // commenter has permission?
    $perms = $ctx->mt->db()->fetch_permission(array('blog_id' => $blog_id, 'id' => $cmntr->author_id));
    if (!empty($perms))
        return false;
    $perms = $perms[0];
    if (strstr($perms->permission_restrictions, "'comment'"))
        return false;
    elseif (strstr($perms->permission_permissions, "'comment'") || strstr($perms->permission_permissions, "'manage_feedback'"))
        return true;
    else
        return false;
}
?>
