lisp/gnus/nngateway.el

   1 ;;; nngateway.el --- posting news via mail gateways
   2
   3 ;; Copyright (C) 1996-2017 Free Software Foundation, Inc.
   4
   5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   6 ;; Keywords: news, mail
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;; Code:
  26
  27 (eval-when-compile (require 'cl))
  28 (require 'nnoo)
  29 (require 'message)
  30
  31 (nnoo-declare nngateway)
  32
  33 (defvoo nngateway-address nil
  34   "Address of the mail-to-news gateway.")
  35
  36 (defvoo nngateway-header-transformation 'nngateway-simple-header-transformation
  37   "Function to be called to rewrite the news headers into mail headers.
  38 It is called narrowed to the headers to be transformed with one
  39 parameter -- the gateway address.")
  40
  41 ;;; Interface functions
  42
  43 (nnoo-define-basics nngateway)
  44
  45 (deffoo nngateway-open-server (server &optional defs)
  46   (if (nngateway-server-opened server)
  47       t
  48     (unless (assq 'nngateway-address defs)
  49       (setq defs (append defs (list (list 'nngateway-address server)))))
  50     (nnoo-change-server 'nngateway server defs)))
  51
  52 (deffoo nngateway-request-post (&optional server)
  53   (when (or (nngateway-server-opened server)
  54             (nngateway-open-server server))
  55     ;; Rewrite the header.
  56     (let ((buf (current-buffer)))
  57       (with-temp-buffer
  58         (insert-buffer-substring buf)
  59         (message-narrow-to-head)
  60         (funcall nngateway-header-transformation nngateway-address)
  61         (goto-char (point-max))
  62         (insert mail-header-separator "\n")
  63         (widen)
  64         (let (message-required-mail-headers)
  65           (funcall (or message-send-mail-real-function
  66                        message-send-mail-function)))
  67         t))))
  68
  69 ;;; Internal functions
  70
  71 (defun nngateway-simple-header-transformation (gateway)
  72   "Transform the headers to use GATEWAY."
  73   (let ((newsgroups (mail-fetch-field "newsgroups")))
  74     (message-remove-header "to")
  75     (message-remove-header "cc")
  76     (goto-char (point-min))
  77     (insert "To: " (nnheader-replace-chars-in-string newsgroups ?. ?-)
  78             "@" gateway "\n")))
  79
  80 (defun nngateway-mail2news-header-transformation (gateway)
  81   "Transform the headers for sending to a mail2news gateway."
  82   (message-remove-header "to")
  83   (message-remove-header "cc")
  84   (goto-char (point-min))
  85   (insert "To: " gateway "\n"))
  86
  87 (nnoo-define-skeleton nngateway)
  88
  89 (provide 'nngateway)
  90
  91 ;;; nngateway.el ends here