lisp/gnus/nnagent.el

   1 ;;; nnagent.el --- offline backend for Gnus
   2 ;; Copyright (C) 1997,98 Free Software Foundation, Inc.
   3
   4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   5 ;; Keywords: news, mail
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 2, or (at your option)
  12 ;; any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 ;; Boston, MA 02111-1307, USA.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 (require 'nnheader)
  29 (require 'nnoo)
  30 (eval-when-compile (require 'cl))
  31 (require 'gnus-agent)
  32 (require 'nnml)
  33
  34 (nnoo-declare nnagent
  35   nnml)
  36
  37 \f
  38
  39 (defconst nnagent-version "nnagent 1.0")
  40
  41 (defvoo nnagent-directory nil
  42   "Internal variable."
  43   nnml-directory)
  44
  45 (defvoo nnagent-active-file nil
  46   "Internal variable."
  47   nnml-active-file)
  48
  49 (defvoo nnagent-newsgroups-file nil
  50   "Internal variable."
  51   nnml-newsgroups-file)
  52
  53 (defvoo nnagent-get-new-mail nil
  54   "Internal variable."
  55   nnml-get-new-mail)
  56
  57 ;;; Interface functions.
  58
  59 (nnoo-define-basics nnagent)
  60
  61 (deffoo nnagent-open-server (server &optional defs)
  62   (setq defs
  63         `((nnagent-directory ,(gnus-agent-directory))
  64           (nnagent-active-file ,(gnus-agent-lib-file "active"))
  65           (nnagent-newsgroups-file ,(gnus-agent-lib-file "newsgroups"))
  66           (nnagent-get-new-mail nil)))
  67   (nnoo-change-server 'nnagent server defs)
  68   (let ((dir (gnus-agent-directory))
  69         err)
  70     (cond
  71      ((not (condition-case arg
  72                (file-exists-p dir)
  73              (ftp-error (setq err (format "%s" arg)))))
  74       (nnagent-close-server)
  75       (nnheader-report
  76        'nnagent (or err
  77                     (format "No such file or directory: %s" dir))))
  78      ((not (file-directory-p (file-truename dir)))
  79       (nnagent-close-server)
  80       (nnheader-report 'nnagent "Not a directory: %s" dir))
  81      (t
  82       (nnheader-report 'nnagent "Opened server %s using directory %s"
  83                        server dir)
  84       t))))
  85
  86 (deffoo nnagent-retrieve-groups (groups &optional server)
  87   (save-excursion
  88     (cond
  89      ((file-exists-p (gnus-agent-lib-file "groups"))
  90       (nnmail-find-file (gnus-agent-lib-file "groups"))
  91       'groups)
  92      ((file-exists-p (gnus-agent-lib-file "active"))
  93       (nnmail-find-file (gnus-agent-lib-file "active"))
  94       'active)
  95      (t nil))))
  96
  97 (defun nnagent-request-type (group article)
  98   (unless (stringp article)
  99     (let ((gnus-plugged t))
 100       (if (not (gnus-check-backend-function
 101                 'request-type (car gnus-command-method)))
 102           'unknown
 103         (funcall (gnus-get-function gnus-command-method 'request-type)
 104                  (gnus-group-real-name group) article)))))
 105
 106 (deffoo nnagent-request-newgroups (date server)
 107   nil)
 108
 109 (deffoo nnagent-request-update-info (group info &optional server)
 110   nil)
 111
 112 (deffoo nnagent-request-post (&optional server)
 113   (gnus-agent-insert-meta-information 'news gnus-command-method)
 114   (gnus-request-accept-article "nndraft:queue"))
 115
 116 ;; Use nnml functions for just about everything.
 117 (nnoo-import nnagent
 118   (nnml))
 119
 120 \f
 121 ;;; Internal functions.
 122
 123 (provide 'nnagent)
 124
 125 ;;; nnagent.el ends here