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;;; nndraft.el --- draft article access for Gnus
;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000
;; Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; 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 'nnmail)
(require 'gnus-start)
(require 'nnmh)
(require 'nnoo)
(require 'mm-util)
(eval-when-compile
(require 'cl)
;; This is just to shut up the byte-compiler.
(fset 'nndraft-request-group 'ignore))
(nnoo-declare nndraft
nnmh)
(defvoo nndraft-directory (nnheader-concat gnus-directory "drafts/")
"Where nndraft will store its files."
nnmh-directory)
(defvoo nndraft-current-group "" nil nnmh-current-group)
(defvoo nndraft-get-new-mail nil nil nnmh-get-new-mail)
(defvoo nndraft-current-directory nil nil nnmh-current-directory)
(defconst nndraft-version "nndraft 1.0")
(defvoo nndraft-status-string "" nil nnmh-status-string)
;;; Interface functions.
(nnoo-define-basics nndraft)
(deffoo nndraft-open-server (server &optional defs)
(nnoo-change-server 'nndraft server defs)
(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-retrieve-headers (articles &optional group server fetch-old)
(nndraft-possibly-change-group group)
(save-excursion
(set-buffer nntp-server-buffer)
(erase-buffer)
(let* (article)
;; We don't support fetching by Message-ID.
(if (stringp (car articles))
'headers
(while articles
(narrow-to-region (point) (point))
(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))
(goto-char (point-min))
(insert (format "221 %d Article retrieved.\n" article))
(widen)
(goto-char (point-max))
(insert ".\n")))
(nnheader-fold-continuation-lines)
'headers))))
(deffoo nndraft-request-article (id &optional group server buffer)
(nndraft-possibly-change-group group)
(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)
(let ((nnmail-file-coding-system
(if (file-newer-than-file-p file auto)
(if (equal group "drafts")
message-draft-coding-system
mm-text-coding-system)
mm-auto-save-coding-system)))
(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."
(nndraft-possibly-change-group group)
(when (nndraft-request-article article group server (current-buffer))
(message-remove-header "xref")
(message-remove-header "lines")
t))
(deffoo nndraft-request-update-info (group info &optional server)
(nndraft-possibly-change-group group)
(gnus-info-set-read
info
(gnus-update-read-articles (gnus-group-prefixed-name group '(nndraft ""))
(nndraft-articles) t))
(let ((marks (nth 3 info)))
(when marks
;; Nix out all marks except the `unsend'-able article marks.
(setcar (nthcdr 3 info)
(if (assq 'unsend marks)
(list (assq 'unsend marks))
nil))))
t)
(deffoo nndraft-request-associate-buffer (group)
"Associate the current buffer with some article in the draft group."
(nndraft-open-server "")
(nndraft-request-group group)
(nndraft-possibly-change-group group)
(let ((gnus-verbose-backends nil)
(buf (current-buffer))
article file)
(with-temp-buffer
(insert-buffer-substring buf)
(setq article (nndraft-request-accept-article
group (nnoo-current-server 'nndraft) t 'noinsert)
file (nndraft-article-filename article)))
(setq buffer-file-name (expand-file-name file)
buffer-auto-save-file-name (make-auto-save-file-name))
(clear-visited-file-modtime)
article))
(deffoo nndraft-request-expire-articles (articles group &optional server force)
(nndraft-possibly-change-group group)
(let* ((nnmh-allow-delete-final t)
(res (nnoo-parent-function 'nndraft
'nnmh-request-expire-articles
(list 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 ((auto (nndraft-auto-save-file-name
(nndraft-article-filename article))))
(when (file-exists-p auto)
(funcall nnmail-delete-file-function auto)))
(dolist (backup
(let ((kept-new-versions 1)
(kept-old-versions 0))
(find-backup-file-name
(nndraft-article-filename article))))
(when (file-exists-p backup)
(funcall nnmail-delete-file-function backup)))))
res))
(deffoo nndraft-request-accept-article (group &optional server last noinsert)
(nndraft-possibly-change-group group)
(let ((gnus-verbose-backends nil))
(nnoo-parent-function 'nndraft 'nnmh-request-accept-article
(list group server last noinsert))))
(deffoo nndraft-request-replace-article (article group buffer)
(nndraft-possibly-change-group group)
(let ((nnmail-file-coding-system
(if (equal group "drafts")
mm-auto-save-coding-system
mm-text-coding-system)))
(nnoo-parent-function 'nndraft 'nnmh-request-replace-article
(list article group buffer))))
(deffoo nndraft-request-create-group (group &optional server args)
(nndraft-possibly-change-group group)
(if (file-exists-p nndraft-current-directory)
(if (file-directory-p nndraft-current-directory)
t
nil)
(condition-case ()
(progn
(gnus-make-directory nndraft-current-directory)
t)
(file-error nil))))
;;; Low-Level Interface
(defun nndraft-possibly-change-group (group)
(when (and group
(not (equal group nndraft-current-group)))
(nndraft-open-server "")
(setq nndraft-current-group group)
(setq nndraft-current-directory
(nnheader-concat nndraft-directory group))))
(defun nndraft-article-filename (article &rest args)
(apply 'concat
(file-name-as-directory nndraft-current-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)))))
(defun nndraft-articles ()
"Return the list of messages in the group."
(gnus-make-directory nndraft-current-directory)
(sort
(mapcar 'string-to-int
(directory-files nndraft-current-directory nil "\\`[0-9]+\\'" t))
'<))
(nnoo-import nndraft
(nnmh
nnmh-retrieve-headers
nnmh-request-group
nnmh-close-group
nnmh-request-list
nnmh-request-newsgroups
nnmh-request-move-article))
(provide 'nndraft)
;;; nndraft.el ends here
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