1 ;;; nndraft.el --- draft article access for Gnus
3 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 ;; 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
34 (eval-when-compile (require 'cl))
39 (defvoo nndraft-directory (nnheader-concat gnus-directory "drafts/")
40 "Where nndraft will store its files."
43 (defvar nndraft-required-headers '(Date)
44 "*Headers to be generated when saving a draft message.
45 The headers in this variable and the ones in `message-required-headers'
46 are generated if and only if they are also in `message-draft-headers'.")
50 (defvoo nndraft-current-group "" nil nnmh-current-group)
51 (defvoo nndraft-get-new-mail nil nil nnmh-get-new-mail)
52 (defvoo nndraft-current-directory nil nil nnmh-current-directory)
54 (defconst nndraft-version "nndraft 1.0")
55 (defvoo nndraft-status-string "" nil nnmh-status-string)
59 ;;; Interface functions.
61 (nnoo-define-basics nndraft)
63 (deffoo nndraft-open-server (server &optional defs)
64 (nnoo-change-server 'nndraft server defs)
66 ((not (file-exists-p nndraft-directory))
67 (nndraft-close-server)
68 (nnheader-report 'nndraft "No such file or directory: %s"
70 ((not (file-directory-p (file-truename nndraft-directory)))
71 (nndraft-close-server)
72 (nnheader-report 'nndraft "Not a directory: %s" nndraft-directory))
74 (nnheader-report 'nndraft "Opened server %s using directory %s"
75 server nndraft-directory)
78 (deffoo nndraft-retrieve-headers (articles &optional group server fetch-old)
79 (nndraft-possibly-change-group group)
80 (with-current-buffer nntp-server-buffer
83 ;; We don't support fetching by Message-ID.
84 (if (stringp (car articles))
87 (narrow-to-region (point) (point))
88 (when (nndraft-request-article
89 (setq article (pop articles)) group server (current-buffer))
90 (goto-char (point-min))
91 (if (search-forward "\n\n" nil t)
93 (goto-char (point-max)))
94 (delete-region (point) (point-max))
95 (goto-char (point-min))
96 (insert (format "221 %d Article retrieved.\n" article))
98 (goto-char (point-max))
101 (nnheader-fold-continuation-lines)
104 (deffoo nndraft-request-article (id &optional group server buffer)
105 (nndraft-possibly-change-group group)
107 ;; We get the newest file of the auto-saved file and the
109 (let* ((file (nndraft-article-filename id))
110 (auto (nndraft-auto-save-file-name file))
111 (newest (if (file-newer-than-file-p file auto) file auto))
112 (nntp-server-buffer (or buffer nntp-server-buffer)))
113 (when (and (file-exists-p newest)
114 (let ((nnmail-file-coding-system
115 (if (file-newer-than-file-p file auto)
116 (if (member group '("drafts" "delayed"))
117 message-draft-coding-system
118 mm-text-coding-system)
119 mm-auto-save-coding-system)))
120 (nnmail-find-file newest)))
121 (with-current-buffer nntp-server-buffer
122 (goto-char (point-min))
123 ;; If there's a mail header separator in this file,
125 (when (re-search-forward
126 (concat "^" (regexp-quote mail-header-separator) "$") nil t)
127 (replace-match "" t t)))
130 (deffoo nndraft-request-restore-buffer (article &optional group server)
131 "Request a new buffer that is restored to the state of ARTICLE."
132 (nndraft-possibly-change-group group)
133 (when (nndraft-request-article article group server (current-buffer))
134 (message-remove-header "xref")
135 (message-remove-header "lines")
136 ;; Articles in nndraft:queue are considered as sent messages. The
137 ;; Date field should be the time when they are sent.
138 ;;(message-remove-header "date")
141 (deffoo nndraft-request-update-info (group info &optional server)
142 (nndraft-possibly-change-group group)
145 (gnus-update-read-articles (gnus-group-prefixed-name group '(nndraft ""))
146 (nndraft-articles) t))
147 (let ((marks (nth 3 info)))
149 ;; Nix out all marks except the `unsend'-able article marks.
150 (setcar (nthcdr 3 info)
151 (if (assq 'unsend marks)
152 (list (assq 'unsend marks))
156 (defun nndraft-generate-headers ()
158 (message-generate-headers
159 (message-headers-to-generate
160 nndraft-required-headers message-draft-headers nil))))
162 (deffoo nndraft-request-associate-buffer (group)
163 "Associate the current buffer with some article in the draft group."
164 (nndraft-open-server "")
165 (nndraft-request-group group)
166 (nndraft-possibly-change-group group)
167 (let ((gnus-verbose-backends nil)
168 (buf (current-buffer))
171 (insert-buffer-substring buf)
172 (setq article (nndraft-request-accept-article
173 group (nnoo-current-server 'nndraft) t 'noinsert)
174 file (nndraft-article-filename article)))
175 (setq buffer-file-name (expand-file-name file)
176 buffer-auto-save-file-name (make-auto-save-file-name))
177 (clear-visited-file-modtime)
178 (let ((hook (if (boundp 'write-contents-functions)
179 'write-contents-functions
180 'write-contents-hooks)))
181 (gnus-make-local-hook hook)
182 (add-hook hook 'nndraft-generate-headers nil t))
185 (deffoo nndraft-request-group (group &optional server dont-check info)
186 (nndraft-possibly-change-group group)
188 (let* ((pathname (nnmail-group-pathname group nndraft-directory))
189 (file-name-coding-system nnmail-pathname-coding-system)
191 (nnheader-re-read-dir pathname)
192 (setq dir (mapcar (lambda (name) (string-to-number (substring name 1)))
193 (ignore-errors (directory-files
194 pathname nil "^#[0-9]+#$" t))))
196 (unless (file-exists-p
197 (setq file (expand-file-name (int-to-string n) pathname)))
198 (rename-file (nndraft-auto-save-file-name file) file)))))
199 (nnoo-parent-function 'nndraft
201 (list group server dont-check)))
203 (deffoo nndraft-request-move-article (article group server accept-form
204 &optional last move-is-internal)
205 (nndraft-possibly-change-group group)
206 (let ((buf (get-buffer-create " *nndraft move*"))
209 (nndraft-request-article article group server)
210 (with-current-buffer buf
212 (insert-buffer-substring nntp-server-buffer)
213 (setq result (eval accept-form))
214 (kill-buffer (current-buffer))
216 (null (nndraft-request-expire-articles (list article) group server 'force))
219 (deffoo nndraft-request-expire-articles (articles group &optional server force)
220 (nndraft-possibly-change-group group)
221 (let* ((nnmh-allow-delete-final t)
222 (res (nnoo-parent-function 'nndraft
223 'nnmh-request-expire-articles
224 (list articles group server force)))
226 ;; Delete all the "state" files of articles that have been expired.
228 (unless (memq (setq article (pop articles)) res)
229 (let ((auto (nndraft-auto-save-file-name
230 (nndraft-article-filename article))))
231 (when (file-exists-p auto)
232 (funcall nnmail-delete-file-function auto)))
234 (let ((kept-new-versions 1)
235 (kept-old-versions 0))
236 (find-backup-file-name
237 (nndraft-article-filename article))))
238 (when (file-exists-p backup)
239 (funcall nnmail-delete-file-function backup)))))
242 (deffoo nndraft-request-accept-article (group &optional server last noinsert)
243 (nndraft-possibly-change-group group)
244 (let ((gnus-verbose-backends nil))
245 (nnoo-parent-function 'nndraft 'nnmh-request-accept-article
246 (list group server last noinsert))))
248 (deffoo nndraft-request-replace-article (article group buffer)
249 (nndraft-possibly-change-group group)
250 (let ((nnmail-file-coding-system
251 (if (member group '("drafts" "delayed"))
252 message-draft-coding-system
253 mm-text-coding-system)))
254 (nnoo-parent-function 'nndraft 'nnmh-request-replace-article
255 (list article group buffer))))
257 (deffoo nndraft-request-create-group (group &optional server args)
258 (nndraft-possibly-change-group group)
259 (if (file-exists-p nndraft-current-directory)
260 (if (file-directory-p nndraft-current-directory)
265 (gnus-make-directory nndraft-current-directory)
270 ;;; Low-Level Interface
272 (defun nndraft-possibly-change-group (group)
274 (not (equal group nndraft-current-group)))
275 (nndraft-open-server "")
276 (setq nndraft-current-group group)
277 (setq nndraft-current-directory
278 (nnheader-concat nndraft-directory group))))
280 (defun nndraft-article-filename (article &rest args)
282 (file-name-as-directory nndraft-current-directory)
283 (int-to-string article)
286 (defun nndraft-auto-save-file-name (file)
290 (set-buffer (get-buffer-create " *draft tmp*"))
291 (setq buffer-file-name file)
292 (make-auto-save-file-name))
293 (kill-buffer (current-buffer)))))
295 (defun nndraft-articles ()
296 "Return the list of messages in the group."
297 (gnus-make-directory nndraft-current-directory)
299 (mapcar 'string-to-number
300 (directory-files nndraft-current-directory nil "\\`[0-9]+\\'" t))
305 nnmh-retrieve-headers
309 nnmh-request-newsgroups))
313 ;;; nndraft.el ends here