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;;; nndraft.el --- draft article access for Gnus
;; Copyright (C) 1995,96,97 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
;; 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:
;;; Code:
(require 'nnheader)
(require 'nnmh)
(require 'nnoo)
(eval-and-compile (require 'cl))
(nnoo-declare nndraft)
(eval-and-compile
(autoload 'mail-send-and-exit "sendmail"))
(defvoo nndraft-directory nil
"Where nndraft will store its directory.")
(defconst nndraft-version "nndraft 1.0")
(defvoo nndraft-status-string "")
;;; Interface functions.
(nnoo-define-basics nndraft)
(deffoo nndraft-retrieve-headers (articles &optional group server fetch-old)
(save-excursion
(set-buffer nntp-server-buffer)
(erase-buffer)
(let* ((buf (get-buffer-create " *draft headers*"))
article)
(set-buffer buf)
(buffer-disable-undo (current-buffer))
(erase-buffer)
;; We don't support fetching by Message-ID.
(if (stringp (car articles))
'headers
(while articles
(set-buffer buf)
(when (nndraft-request-article
(setq article (pop articles)) group server (current-buffer))
(goto-char (point-min))
(if (search-forward "\n\n" nil t)
(forward-line -1)
(goto-char (point-max)))
(delete-region (point) (point-max))
(set-buffer nntp-server-buffer)
(goto-char (point-max))
(insert (format "221 %d Article retrieved.\n" article))
(insert-buffer-substring buf)
(insert ".\n")))
(nnheader-fold-continuation-lines)
'headers))))
(deffoo nndraft-open-server (server &optional defs)
(nnoo-change-server 'nndraft server defs)
(unless (assq 'nndraft-directory defs)
(setq nndraft-directory server))
(cond
((not (file-exists-p nndraft-directory))
(nndraft-close-server)
(nnheader-report 'nndraft "No such file or directory: %s"
nndraft-directory))
((not (file-directory-p (file-truename nndraft-directory)))
(nndraft-close-server)
(nnheader-report 'nndraft "Not a directory: %s" nndraft-directory))
(t
(nnheader-report 'nndraft "Opened server %s using directory %s"
server nndraft-directory)
t)))
(deffoo nndraft-request-article (id &optional group server buffer)
(when (numberp id)
;; We get the newest file of the auto-saved file and the
;; "real" file.
(let* ((file (nndraft-article-filename id))
(auto (nndraft-auto-save-file-name file))
(newest (if (file-newer-than-file-p file auto) file auto))
(nntp-server-buffer (or buffer nntp-server-buffer)))
(when (and (file-exists-p newest)
(nnmail-find-file newest))
(save-excursion
(set-buffer nntp-server-buffer)
(goto-char (point-min))
;; If there's a mail header separator in this file,
;; we remove it.
(when (re-search-forward
(concat "^" mail-header-separator "$") nil t)
(replace-match "" t t)))
t))))
(deffoo nndraft-request-restore-buffer (article &optional group server)
"Request a new buffer that is restored to the state of ARTICLE."
(let ((file (nndraft-article-filename article ".state"))
nndraft-point nndraft-mode nndraft-buffer-name)
(when (file-exists-p file)
(load file t t t)
(when nndraft-buffer-name
(set-buffer (get-buffer-create
(generate-new-buffer-name nndraft-buffer-name)))
(nndraft-request-article article group server (current-buffer))
(funcall nndraft-mode)
(let ((gnus-verbose-backends nil))
(nndraft-request-expire-articles (list article) group server t))
(goto-char nndraft-point))
nndraft-buffer-name)))
(deffoo nndraft-request-update-info (group info &optional server)
(setcar (cddr info) nil)
(when (nth 3 info)
(setcar (nthcdr 3 info) nil))
t)
(deffoo nndraft-request-associate-buffer (group)
"Associate the current buffer with some article in the draft group."
(let* ((gnus-verbose-backends nil)
(article (cdr (nndraft-request-accept-article
group (nnoo-current-server 'nndraft) t 'noinsert)))
(file (nndraft-article-filename article)))
(setq buffer-file-name file)
(setq buffer-auto-save-file-name (make-auto-save-file-name))
(clear-visited-file-modtime)
article))
(deffoo nndraft-request-group (group &optional server dont-check)
(prog1
(nndraft-execute-nnmh-command
`(nnmh-request-group group "" ,dont-check))
(nnheader-report 'nndraft nnmh-status-string)))
(deffoo nndraft-request-list (&optional server dir)
(nndraft-execute-nnmh-command
`(nnmh-request-list nil ,dir)))
(deffoo nndraft-request-newgroups (date &optional server)
(nndraft-execute-nnmh-command
`(nnmh-request-newgroups ,date ,server)))
(deffoo nndraft-request-expire-articles
(articles group &optional server force)
(let ((res (nndraft-execute-nnmh-command
`(nnmh-request-expire-articles
',articles group ,server ,force)))
article)
;; Delete all the "state" files of articles that have been expired.
(while articles
(unless (memq (setq article (pop articles)) res)
(let ((file (nndraft-article-filename article ".state"))
(auto (nndraft-auto-save-file-name
(nndraft-article-filename article))))
(when (file-exists-p file)
(funcall nnmail-delete-file-function file))
(when (file-exists-p auto)
(funcall nnmail-delete-file-function auto)))))
res))
(deffoo nndraft-request-accept-article (group &optional server last noinsert)
(let* ((point (point))
(mode major-mode)
(name (buffer-name))
(gnus-verbose-backends nil)
(gart (nndraft-execute-nnmh-command
`(nnmh-request-accept-article group ,server ,last noinsert)))
(state
(nndraft-article-filename (cdr gart) ".state")))
;; Write the "state" file.
(save-excursion
(nnheader-set-temp-buffer " *draft state*")
(insert (format "%S\n" `(setq nndraft-mode (quote ,mode)
nndraft-point ,point
nndraft-buffer-name ,name)))
(write-region (point-min) (point-max) state nil 'silent)
(kill-buffer (current-buffer)))
gart))
(deffoo nndraft-close-group (group &optional server)
t)
(deffoo nndraft-request-create-group (group &optional server args)
(if (file-exists-p nndraft-directory)
(if (file-directory-p nndraft-directory)
t
nil)
(condition-case ()
(progn
(gnus-make-directory nndraft-directory)
t)
(file-error nil))))
;;; Low-Level Interface
(defun nndraft-execute-nnmh-command (command)
(let ((dir (expand-file-name nndraft-directory)))
(when (string-match "/$" dir)
(setq dir (substring dir 0 (match-beginning 0))))
(string-match "/[^/]+$" dir)
(let ((group (substring dir (1+ (match-beginning 0))))
(nnmh-directory (substring dir 0 (1+ (match-beginning 0))))
(nnmail-keep-last-article nil)
(nnmh-get-new-mail nil))
(eval command))))
(defun nndraft-article-filename (article &rest args)
(apply 'concat
(file-name-as-directory nndraft-directory)
(int-to-string article)
args))
(defun nndraft-auto-save-file-name (file)
(save-excursion
(prog1
(progn
(set-buffer (get-buffer-create " *draft tmp*"))
(setq buffer-file-name file)
(make-auto-save-file-name))
(kill-buffer (current-buffer)))))
(provide 'nndraft)
;;; nndraft.el ends here
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