comment_file_types=(md html)

fn conf_enable_comments {
    if(~ $1 -n) {
        allow_new_user_comments=yes
        shift
    }
    if not if(~ $1 -a) {
        bridge_anon_comments=yes 
    }
    enable_comments=yes
    groups_allowed_comments=$*
    conf_enable_app bridge
}

fn bridge_init {
    if(~ $#enable_comments 1 && ! ~ `{ls $local_path.$comment_file_types >[2]/dev/null|wc -l} 0) {

        comments_dir=$sitedir$req_path'_werc/comments'
        if(~ $REQUEST_METHOD GET && test -d $comments_dir)
            ll_add handlers_body_foot template apps/bridge/comments_list.tpl

        if(check_user $groups_allowed_comments || {~ $#logged_user 0 && ~ 1 $#allow_new_user_comments $#bridge_anon_comments}) {

            if(~ $#post_arg_bridge_post 1) {
                ll_add handlers_body_foot template apps/bridge/foot.tpl

                if(mk_new_comment $comments_dir)
                    post_redirect $base_url^$req_path
                if not
                    saved_comment_text=$post_arg_comment_text
            }
            if not if(~ $REQUEST_METHOD GET)
                ll_add handlers_body_foot template apps/bridge/foot.tpl
        }
        if not if(~ $REQUEST_METHOD GET)
            ll_add handlers_body_foot echo '<hr><p>To post a comment you need to <a href="/_users/login">login</a> first.</p>'
    }
}

fn validate_new_user {
    usr=$1; pass=$2; pass2=$3
    _status=()

    if(~ $"usr '' || ! echo $usr |sed 1q|grep -s '^'$allowed_user_chars'+$')
        _status='Requested user name is invalid, must match: '^$allowed_user_chars^'+'
    if not if(test -d etc/users/$usr)
        _status='Sorry, user name '''^$usr^''' already taken, please pick a different one.'

    if(~ $"pass '' || ! ~ $"pass $"pass2)
        _status=($_status 'Provided passwords don''t match.')

    status=$_status
}


fn mk_new_comment {
    _status=()
    dir=$1
    if(~ $"post_arg_comment_text '')
        _status='Provide a comment!'
    if not if(~ $#logged_user 0) {
        if(! ~ $#allow_new_user_comments 0) {
            if(validate_new_user $"post_arg_comment_user $post_arg_comment_passwd $post_arg_comment_passwd2) {
                u=$post_arg_comment_user':'$post_arg_comment_passwd
                dir=$comments_dir^'_pending'
                # XXX: This doesn't work because we then do a redirect. 
                notify_notes='Saved comment and registration info, they will be enabled when approved by an admin.'
            }
            if not
                _status=$status
        }
        if not if(! ~ $#bridge_anon_comments 0) {
            if(~ $"post_arg_ima_robot 'not')
                u='Glenda' # Anonymous
            if not
                _status='You are a robot!'
        }
        if not
            _status='You need to log in to comment.'
    }
    if not if(check_user $groups_allowed_comments)
        u=$logged_user
    if not
        _status='You are not a member of a group allowed to comment.'

    if(~ $#_status 0) {
        umask 002

        dir=$dir'/'`{date -n} # FIXME Obvious race
        mkdir -m 775 -p $dir &&
            echo $u > $dir/user &&
            echo $current_date_time > $dir/posted &&
            echo $post_arg_comment_text > $dir/body
        _s=$status
        if(! ~ $"_s '') {
           dprint 'ERROR XXX: Could not create comment: ' $_s 
            _status='Could not post comment due internal error, sorry.'
        }
    }
    notify_errors=$_status
    status=$_status
}