;; -*- emacs-lisp -*-
;;; gnus-mst-common.el --- functions used by a number of files

;; Author: Mark Triggs <mst@dishevelled.net>
;; Keywords: news
;; $Id: gnus-mst-common.el,v 1.25 2004/01/21 02:37:37 mst Exp $

;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Code:

(defun gnus-bbdb-get-group (address &optional default)
  "Return the gnus-group field for a BBDB user (or users)
identified by ADDRESS"
  (let* ((emails (mapcar 'car (ietf-drums-parse-addresses address)))
         (records (mapcar (lambda (a) (bbdb-search-simple nil a)) emails)))
    (if (some 'identity records)
        (mapconcat 'identity
                   (remove-duplicates
                    (mapcar (lambda (r)
                              (if (or (null r)
                                      (string= (bbdb-get-field r 'gnus-group)
                                               ""))
                                  default
                                (bbdb-get-field r 'gnus-group)))
                            records))
                   ", ")
      default)))

(provide 'gnus-mst-common)
;;; gnus-mst-common.el ends here