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;;; gnus-ml.el --- Mailing list minor mode for Gnus
;; Copyright (C) 2000-2021 Free Software Foundation, Inc.
;; Author: Julien Gilles <jgilles@free.fr>
;; Keywords: news, mail
;; 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 3 of the License, 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. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; implement (small subset of) RFC 2369
;;; Code:
(require 'gnus)
(require 'gnus-msg)
;;; Mailing list minor mode
(defvar gnus-mailing-list-mode-map
(let ((map (make-sparse-keymap)))
(gnus-define-keys map
"\C-c\C-nh" gnus-mailing-list-help
"\C-c\C-ns" gnus-mailing-list-subscribe
"\C-c\C-nu" gnus-mailing-list-unsubscribe
"\C-c\C-np" gnus-mailing-list-post
"\C-c\C-no" gnus-mailing-list-owner
"\C-c\C-na" gnus-mailing-list-archive)
map))
(defvar gnus-mailing-list-menu)
(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]))))
;;;###autoload
(defun turn-on-gnus-mailing-list-mode ()
(when (or (gnus-group-find-parameter gnus-newsgroup-name 'to-list)
(and gnus-mailing-list-groups
(string-match gnus-mailing-list-groups gnus-newsgroup-name)))
(gnus-mailing-list-mode 1)))
;;;###autoload
(defun gnus-mailing-list-insinuate (&optional force)
"Setup group parameters from List-Post header.
If FORCE is non-nil, replace the old ones."
(interactive "P")
(let ((list-post
(with-current-buffer gnus-original-article-buffer
(gnus-fetch-field "list-post"))))
(if list-post
(if (and (not force)
(gnus-group-get-parameter gnus-newsgroup-name 'to-list))
(gnus-message 1 "to-list is non-nil.")
(if (string-match "<mailto:\\([^>]*\\)>" list-post)
(setq list-post (match-string 1 list-post)))
(gnus-group-add-parameter gnus-newsgroup-name
(cons 'to-list list-post))
(gnus-mailing-list-mode 1))
(gnus-message 1 "no list-post in this message."))))
;;;###autoload
(define-minor-mode gnus-mailing-list-mode
"Minor mode for providing mailing-list commands.
\\{gnus-mailing-list-mode-map}"
:lighter " Mailing-List"
:keymap gnus-mailing-list-mode-map
(cond
((not (derived-mode-p 'gnus-summary-mode))
(setq gnus-mailing-list-mode nil))
(gnus-mailing-list-mode
;; Set up the menu.
(when (gnus-visual-p 'mailing-list-menu 'menu)
(gnus-mailing-list-make-menu-bar)))))
;;; Commands
(defun gnus-mailing-list-help ()
"Get help from mailing list server."
(interactive)
(let ((list-help
(with-current-buffer gnus-original-article-buffer
(gnus-fetch-field "list-help"))))
(cond (list-help (gnus-mailing-list-message list-help))
(t (gnus-message 1 "no list-help in this group")))))
(defun gnus-mailing-list-subscribe ()
"Subscribe to mailing list."
(interactive)
(let ((list-subscribe
(with-current-buffer gnus-original-article-buffer
(gnus-fetch-field "list-subscribe"))))
(cond (list-subscribe (gnus-mailing-list-message list-subscribe))
(t (gnus-message 1 "no list-subscribe in this group")))))
(defun gnus-mailing-list-unsubscribe ()
"Unsubscribe from mailing list."
(interactive)
(let ((list-unsubscribe
(with-current-buffer gnus-original-article-buffer
(gnus-fetch-field "list-unsubscribe"))))
(cond (list-unsubscribe (gnus-mailing-list-message list-unsubscribe))
(t (gnus-message 1 "no list-unsubscribe in this group")))))
(defun gnus-mailing-list-post ()
"Post message (really useful ?)"
(interactive)
(let ((list-post
(with-current-buffer gnus-original-article-buffer
(gnus-fetch-field "list-post"))))
(cond (list-post (gnus-mailing-list-message list-post))
(t (gnus-message 1 "no list-post in this group")))))
(defun gnus-mailing-list-owner ()
"Mail to the mailing list owner."
(interactive)
(let ((list-owner
(with-current-buffer gnus-original-article-buffer
(gnus-fetch-field "list-owner"))))
(cond (list-owner (gnus-mailing-list-message list-owner))
(t (gnus-message 1 "no list-owner in this group")))))
(defun gnus-mailing-list-archive ()
"Browse archive."
(interactive)
(require 'browse-url)
(let ((list-archive
(with-current-buffer gnus-original-article-buffer
(gnus-fetch-field "list-archive"))))
(cond (list-archive
(if (string-match "<\\(https?:[^>]*\\)>" list-archive)
(browse-url (match-string 1 list-archive))
(browse-url list-archive)))
(t (gnus-message 1 "no list-archive in this group")))))
;;; Utility functions
(defun gnus-mailing-list-message (address)
"Send message to ADDRESS.
ADDRESS is specified by a \"mailto:\" URL."
(cond
((string-match "<\\(mailto:[^>]*\\)>" address)
(require 'gnus-art)
(gnus-url-mailto (match-string 1 address)))
;; other case <http://...> to be done.
(t nil)))
(provide 'gnus-ml)
;;; gnus-ml.el ends here
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