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[bpt/emacs.git] / lisp / gnus / nndraft.el
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eec82323 1;;; nndraft.el --- draft article access for Gnus
23f87bed 2
e84b4b86 3;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
114f9c96 4;; 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
eec82323 5
6748645f 6;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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7;; Keywords: news
8
9;; This file is part of GNU Emacs.
10
5e809f55 11;; GNU Emacs is free software: you can redistribute it and/or modify
eec82323 12;; it under the terms of the GNU General Public License as published by
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13;; the Free Software Foundation, either version 3 of the License, or
14;; (at your option) any later version.
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15
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.
20
21;; You should have received a copy of the GNU General Public License
5e809f55 22;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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23
24;;; Commentary:
25
26;;; Code:
27
28(require 'nnheader)
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29(require 'nnmail)
30(require 'gnus-start)
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31(require 'nnmh)
32(require 'nnoo)
16409b0b 33(require 'mm-util)
23f87bed 34(eval-when-compile (require 'cl))
eec82323 35
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36(nnoo-declare nndraft
37 nnmh)
eec82323 38
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39(defvoo nndraft-directory (nnheader-concat gnus-directory "drafts/")
40 "Where nndraft will store its files."
41 nnmh-directory)
eec82323 42
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43(defvar nndraft-required-headers '(Date)
44 "*Headers to be generated when saving a draft message.
45The headers in this variable and the ones in `message-required-headers'
46are generated if and only if they are also in `message-draft-headers'.")
47
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48\f
49
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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)
53
eec82323 54(defconst nndraft-version "nndraft 1.0")
6748645f 55(defvoo nndraft-status-string "" nil nnmh-status-string)
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56
57\f
58
59;;; Interface functions.
60
61(nnoo-define-basics nndraft)
62
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63(deffoo nndraft-open-server (server &optional defs)
64 (nnoo-change-server 'nndraft server defs)
65 (cond
66 ((not (file-exists-p nndraft-directory))
67 (nndraft-close-server)
68 (nnheader-report 'nndraft "No such file or directory: %s"
69 nndraft-directory))
70 ((not (file-directory-p (file-truename nndraft-directory)))
71 (nndraft-close-server)
72 (nnheader-report 'nndraft "Not a directory: %s" nndraft-directory))
73 (t
74 (nnheader-report 'nndraft "Opened server %s using directory %s"
75 server nndraft-directory)
76 t)))
77
eec82323 78(deffoo nndraft-retrieve-headers (articles &optional group server fetch-old)
6748645f 79 (nndraft-possibly-change-group group)
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80 (save-excursion
81 (set-buffer nntp-server-buffer)
82 (erase-buffer)
16409b0b 83 (let* (article)
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84 ;; We don't support fetching by Message-ID.
85 (if (stringp (car articles))
86 'headers
87 (while articles
16409b0b 88 (narrow-to-region (point) (point))
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89 (when (nndraft-request-article
90 (setq article (pop articles)) group server (current-buffer))
91 (goto-char (point-min))
92 (if (search-forward "\n\n" nil t)
93 (forward-line -1)
94 (goto-char (point-max)))
95 (delete-region (point) (point-max))
16409b0b 96 (goto-char (point-min))
eec82323 97 (insert (format "221 %d Article retrieved.\n" article))
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98 (widen)
99 (goto-char (point-max))
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100 (insert ".\n")))
101
102 (nnheader-fold-continuation-lines)
103 'headers))))
104
eec82323 105(deffoo nndraft-request-article (id &optional group server buffer)
6748645f 106 (nndraft-possibly-change-group group)
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107 (when (numberp id)
108 ;; We get the newest file of the auto-saved file and the
109 ;; "real" file.
110 (let* ((file (nndraft-article-filename id))
111 (auto (nndraft-auto-save-file-name file))
112 (newest (if (file-newer-than-file-p file auto) file auto))
113 (nntp-server-buffer (or buffer nntp-server-buffer)))
114 (when (and (file-exists-p newest)
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115 (let ((nnmail-file-coding-system
116 (if (file-newer-than-file-p file auto)
23f87bed 117 (if (member group '("drafts" "delayed"))
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118 message-draft-coding-system
119 mm-text-coding-system)
120 mm-auto-save-coding-system)))
121 (nnmail-find-file newest)))
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122 (save-excursion
123 (set-buffer nntp-server-buffer)
124 (goto-char (point-min))
125 ;; If there's a mail header separator in this file,
126 ;; we remove it.
127 (when (re-search-forward
23f87bed 128 (concat "^" (regexp-quote mail-header-separator) "$") nil t)
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129 (replace-match "" t t)))
130 t))))
131
132(deffoo nndraft-request-restore-buffer (article &optional group server)
133 "Request a new buffer that is restored to the state of ARTICLE."
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134 (nndraft-possibly-change-group group)
135 (when (nndraft-request-article article group server (current-buffer))
136 (message-remove-header "xref")
137 (message-remove-header "lines")
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138 ;; Articles in nndraft:queue are considered as sent messages. The
139 ;; Date field should be the time when they are sent.
140 ;;(message-remove-header "date")
6748645f 141 t))
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142
143(deffoo nndraft-request-update-info (group info &optional server)
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144 (nndraft-possibly-change-group group)
145 (gnus-info-set-read
146 info
147 (gnus-update-read-articles (gnus-group-prefixed-name group '(nndraft ""))
148 (nndraft-articles) t))
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149 (let ((marks (nth 3 info)))
150 (when marks
151 ;; Nix out all marks except the `unsend'-able article marks.
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152 (setcar (nthcdr 3 info)
153 (if (assq 'unsend marks)
154 (list (assq 'unsend marks))
155 nil))))
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156 t)
157
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158(defun nndraft-generate-headers ()
159 (save-excursion
160 (message-generate-headers
161 (message-headers-to-generate
01c52d31 162 nndraft-required-headers message-draft-headers nil))))
23f87bed 163
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164(deffoo nndraft-request-associate-buffer (group)
165 "Associate the current buffer with some article in the draft group."
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166 (nndraft-open-server "")
167 (nndraft-request-group group)
168 (nndraft-possibly-change-group group)
169 (let ((gnus-verbose-backends nil)
170 (buf (current-buffer))
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171 article file)
172 (with-temp-buffer
173 (insert-buffer-substring buf)
6748645f 174 (setq article (nndraft-request-accept-article
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175 group (nnoo-current-server 'nndraft) t 'noinsert)
176 file (nndraft-article-filename article)))
177 (setq buffer-file-name (expand-file-name file)
178 buffer-auto-save-file-name (make-auto-save-file-name))
eec82323 179 (clear-visited-file-modtime)
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180 (let ((hook (if (boundp 'write-contents-functions)
181 'write-contents-functions
182 'write-contents-hooks)))
183 (gnus-make-local-hook hook)
184 (add-hook hook 'nndraft-generate-headers nil t))
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185 article))
186
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187(deffoo nndraft-request-group (group &optional server dont-check)
188 (nndraft-possibly-change-group group)
189 (unless dont-check
190 (let* ((pathname (nnmail-group-pathname group nndraft-directory))
191 (file-name-coding-system nnmail-pathname-coding-system)
192 dir file)
193 (nnheader-re-read-dir pathname)
e9bd5782 194 (setq dir (mapcar (lambda (name) (string-to-number (substring name 1)))
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195 (ignore-errors (directory-files
196 pathname nil "^#[0-9]+#$" t))))
197 (dolist (n dir)
198 (unless (file-exists-p
199 (setq file (expand-file-name (int-to-string n) pathname)))
200 (rename-file (nndraft-auto-save-file-name file) file)))))
201 (nnoo-parent-function 'nndraft
202 'nnmh-request-group
203 (list group server dont-check)))
204
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205(deffoo nndraft-request-move-article (article group server accept-form
206 &optional last move-is-internal)
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207 (nndraft-possibly-change-group group)
208 (let ((buf (get-buffer-create " *nndraft move*"))
209 result)
210 (and
211 (nndraft-request-article article group server)
212 (save-excursion
213 (set-buffer buf)
214 (erase-buffer)
215 (insert-buffer-substring nntp-server-buffer)
216 (setq result (eval accept-form))
217 (kill-buffer (current-buffer))
218 result)
219 (null (nndraft-request-expire-articles (list article) group server 'force))
220 result)))
221
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222(deffoo nndraft-request-expire-articles (articles group &optional server force)
223 (nndraft-possibly-change-group group)
224 (let* ((nnmh-allow-delete-final t)
225 (res (nnoo-parent-function 'nndraft
226 'nnmh-request-expire-articles
227 (list articles group server force)))
228 article)
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229 ;; Delete all the "state" files of articles that have been expired.
230 (while articles
231 (unless (memq (setq article (pop articles)) res)
6748645f 232 (let ((auto (nndraft-auto-save-file-name
eec82323 233 (nndraft-article-filename article))))
eec82323 234 (when (file-exists-p auto)
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235 (funcall nnmail-delete-file-function auto)))
236 (dolist (backup
237 (let ((kept-new-versions 1)
238 (kept-old-versions 0))
239 (find-backup-file-name
240 (nndraft-article-filename article))))
241 (when (file-exists-p backup)
242 (funcall nnmail-delete-file-function backup)))))
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243 res))
244
245(deffoo nndraft-request-accept-article (group &optional server last noinsert)
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246 (nndraft-possibly-change-group group)
247 (let ((gnus-verbose-backends nil))
248 (nnoo-parent-function 'nndraft 'nnmh-request-accept-article
249 (list group server last noinsert))))
eec82323 250
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251(deffoo nndraft-request-replace-article (article group buffer)
252 (nndraft-possibly-change-group group)
253 (let ((nnmail-file-coding-system
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254 (if (member group '("drafts" "delayed"))
255 message-draft-coding-system
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256 mm-text-coding-system)))
257 (nnoo-parent-function 'nndraft 'nnmh-request-replace-article
258 (list article group buffer))))
259
eec82323 260(deffoo nndraft-request-create-group (group &optional server args)
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261 (nndraft-possibly-change-group group)
262 (if (file-exists-p nndraft-current-directory)
263 (if (file-directory-p nndraft-current-directory)
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264 t
265 nil)
266 (condition-case ()
267 (progn
6748645f 268 (gnus-make-directory nndraft-current-directory)
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269 t)
270 (file-error nil))))
271
272\f
273;;; Low-Level Interface
274
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275(defun nndraft-possibly-change-group (group)
276 (when (and group
277 (not (equal group nndraft-current-group)))
278 (nndraft-open-server "")
279 (setq nndraft-current-group group)
280 (setq nndraft-current-directory
281 (nnheader-concat nndraft-directory group))))
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282
283(defun nndraft-article-filename (article &rest args)
284 (apply 'concat
6748645f 285 (file-name-as-directory nndraft-current-directory)
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286 (int-to-string article)
287 args))
288
289(defun nndraft-auto-save-file-name (file)
290 (save-excursion
291 (prog1
292 (progn
293 (set-buffer (get-buffer-create " *draft tmp*"))
294 (setq buffer-file-name file)
295 (make-auto-save-file-name))
296 (kill-buffer (current-buffer)))))
297
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298(defun nndraft-articles ()
299 "Return the list of messages in the group."
300 (gnus-make-directory nndraft-current-directory)
301 (sort
e9bd5782 302 (mapcar 'string-to-number
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303 (directory-files nndraft-current-directory nil "\\`[0-9]+\\'" t))
304 '<))
305
306(nnoo-import nndraft
307 (nnmh
308 nnmh-retrieve-headers
309 nnmh-request-group
310 nnmh-close-group
16409b0b 311 nnmh-request-list
23f87bed 312 nnmh-request-newsgroups))
6748645f 313
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314(provide 'nndraft)
315
cbee283d 316;; arch-tag: 3ce26ca0-41cb-48b1-8703-4dad35e188aa
eec82323 317;;; nndraft.el ends here