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+;;; gnus-ml.el --- Mailing list minor mode for Gnus
+
+;; Copyright (C) 2000 Free Software Foundation, Inc.
+
+;; Author: Julien Gilles  <jgilles@free.fr>
+;; Keywords: news
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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.
+
+;; GNU Emacs 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.
+
+;;; Commentary:
+
+;; implement (small subset of) RFC 2369
+
+;;; Code:
+
+(require 'gnus)
+(eval-when-compile (require 'cl))
+
+;;; Mailing list minor mode
+
+(defvar gnus-mailing-list-mode nil
+  "Minor mode for providing mailing-list commands.")
+
+(defvar gnus-mailing-list-mode-map nil)
+
+(unless gnus-mailing-list-mode-map
+  (setq gnus-mailing-list-mode-map (make-sparse-keymap))
+
+  (gnus-define-keys gnus-mailing-list-mode-map
+    "\C-nh" gnus-mailing-list-help
+    "\C-ns" gnus-mailing-list-subscribe
+    "\C-nu" gnus-mailing-list-unsubscribe
+    "\C-np" gnus-mailing-list-post
+    "\C-no" gnus-mailing-list-owner
+    "\C-na" gnus-mailing-list-archive
+    ))
+
+(defun gnus-mailing-list-make-menu-bar ()
+  (unless (boundp 'gnus-mailing-list-menu)
+    (easy-menu-define
+     gnus-mailing-list-menu gnus-mailing-list-mode-map ""
+     '("Mailing-Lists"
+       ["Get help" gnus-mailing-list-help t]
+       ["Subscribe" gnus-mailing-list-subscribe t]
+       ["Unsubscribe" gnus-mailing-list-unsubscribe t]
+       ["Post a message" gnus-mailing-list-post t]
+       ["Mail to owner" gnus-mailing-list-owner t]
+       ["Browse archive" gnus-mailing-list-archive t]))))
+
+(defun turn-on-gnus-mailing-list-mode ()
+  (when (gnus-group-get-parameter group 'to-list)
+    (gnus-mailing-list-mode 1)))
+
+(defun gnus-mailing-list-mode (&optional arg)
+  "Minor mode for providing mailing-list commands.
+
+\\{gnus-mailing-list-mode-map}"
+  (interactive "P")
+  (when (eq major-mode 'gnus-summary-mode)
+    (when (set (make-local-variable 'gnus-mailing-list-mode)
+	       (if (null arg) (not gnus-mailing-list-mode)
+		 (> (prefix-numeric-value arg) 0)))
+      ;; Set up the menu.
+      (when (gnus-visual-p 'mailing-list-menu 'menu)
+	(gnus-mailing-list-make-menu-bar))
+      (gnus-add-minor-mode 'gnus-mailing-list-mode " Mailing-List" gnus-mailing-list-mode-map)
+      (gnus-run-hooks 'gnus-mailing-list-mode-hook))))
+
+;;; Commands
+
+(defun gnus-mailing-list-help ()
+  "Get help from mailing list server."
+  (interactive)  
+  (cond (list-help (gnus-mailing-list-message list-help))
+	(t (display-message 'no-log "no list-help in this group"))))
+
+(defun gnus-mailing-list-subscribe ()
+  "Subscribe"
+  (interactive)
+  (cond (list-subscribe (gnus-mailing-list-message list-subscribe))
+	(t (display-message 'no-log "no list-subscribe in this group"))))
+
+
+(defun gnus-mailing-list-unsubscribe ()
+  "Unsubscribe"
+  (interactive)
+  (cond (list-unsubscribe (gnus-mailing-list-message list-unsubscribe))
+	(t (display-message 'no-log "no list-unsubscribe in this group"))))
+
+(defun gnus-mailing-list-post ()
+  "Post message (really useful ?)"
+  (interactive)
+  (cond (list-post (gnus-mailing-list-message list-post))
+	(t (display-message 'no-log "no list-post in this group")))
+  )
+
+(defun gnus-mailing-list-owner ()
+  "Mail to the owner"
+  (interactive)
+  (cond (list-owner (gnus-mailing-list-message list-owner))
+	(t (display-message 'no-log "no list-owner in this group")))
+  )
+
+(defun gnus-mailing-list-archive ()
+  "Browse archive"
+  (interactive)
+  (cond (list-archive (gnus-mailing-list-message list-archive))
+	(t (display-message 'no-log "no list-owner in this group")))
+  )
+
+;;; Utility functions
+
+(defun gnus-xmas-mailing-list-menu-add ()
+  (gnus-xmas-menu-add mailing-list
+    gnus-mailing-list-menu))
+
+(add-hook 'gnus-mailing-list-mode-hook 'gnus-xmas-mailing-list-menu-add)
+
+(defun gnus-mailing-list-message (address)
+  ""
+  (let ((mailto  "")
+	(to ())
+	(subject "None")
+	(body "")
+	)
+    (cond 
+     ((string-match "<mailto:\\([^>]*\\)>" address)
+      (let ((args (match-string 1 address)))
+	(cond    				; with param
+	 ((string-match "\\(.*\\)\\?\\(.*\\)" args)
+	  (setq mailto (match-string 1 args))
+	  (let ((param (match-string 2 args)))
+	    (if (string-match "subject=\\([^&]*\\)" param)
+		(setq subject (match-string 1 param)))
+	    (if (string-match "body=\\([^&]*\\)" param)
+		(setq body (match-string 1 param)))
+	    (if (string-match "to=\\([^&]*\\)" param)
+		(push (match-string 1 param) to))
+	    ))	 
+	 (t (setq mailto args)))))			; without param
+     
+     ; other case <http://... to be done.
+     (t nil))
+    (gnus-setup-message 'message (message-mail mailto subject))
+    (insert body)
+    ))
+
+(provide 'gnus-ml)
+
+;;; gnus-ml.el ends here