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;;;; GNU mailutils - a suite of utilities for electronic mail
;;;; Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
;;;;
;;;; This program 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 program 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 this program; if not, write to the Free Software
;;;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  

;;; This is a simple Guile program that generates automatic reply to 
;;; incoming mail messages.
;;;
;;; usage: to your /etc/aliases add:
;;;
;;;   username: "|/usr/local/bin/guimb -f <path>/reply.scm"
;;;
;;; and adjust variables below to your liking.
;;; Any message to the address username@your.host will be responded
;;; and (optionally) saved in a mailbox.

(define indent-prefix "> ")
(define save-mailbox #f)
(define reply-text
  "Sorry, I am not here to attend your message. I will do\n\
it as soon as I come back.\n\n\
Kind regards\n")

;; Reply to the incoming message
(define (reply in-msg)
  (let* ((out-msg (mu-message-create))
	 (inbody (mu-message-get-body in-msg))
	 (outbody (mu-message-get-body out-msg)))
    (mu-message-set-header out-msg "To"
			   (mu-message-get-header in-msg "From"))
    (mu-message-set-header out-msg "Cc"
			   (mu-message-get-header in-msg "Cc"))
    (mu-message-set-header out-msg "Subject"
			   (string-append
			    "Re: "
			    (mu-message-get-header in-msg "Subject")))

    (mu-body-write outbody reply-text)
    
    (mu-body-write outbody "\n\nOriginal message:\n")
    (do ((hdr (mu-message-get-header-fields in-msg) (cdr hdr)))
	 ((null? hdr) #f)
	(let ((s (car hdr)))
	  (mu-body-write outbody (string-append indent-prefix
						(car s) ": " (cdr s) "\n"))))
    (mu-body-write outbody (string-append indent-prefix "\n"))
    (do ((line (mu-body-read-line inbody) (mu-body-read-line inbody)))
	((eof-object? line) #f)
      (mu-body-write outbody (string-append indent-prefix line)))
 	
    (mu-message-send out-msg)))

;;; Upon receiving a message, store it away in the save mailbox and
;;; reply to the sender.
(let ((mbox (and save-mailbox (mu-mailbox-open save-mailbox "cw")))
      (msg (mu-mailbox-get-message current-mailbox 1)))
  (cond
   (mbox
    (mu-mailbox-append-message mbox msg)
    (mu-mailbox-close mbox)))
  (reply msg))	
    
    
	

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