1;;; nnfolder.el --- mail folder access for Gnus
2
3;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4;;   2005, 2006, 2007 Free Software Foundation, Inc.
5
6;; Author: Simon Josefsson <simon@josefsson.org> (adding MARKS)
7;;      ShengHuo Zhu <zsh@cs.rochester.edu> (adding NOV)
8;;      Scott Byer <byer@mv.us.adobe.com>
9;;	Lars Magne Ingebrigtsen <larsi@gnus.org>
10;;	Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
11;; Keywords: mail
12
13;; This file is part of GNU Emacs.
14
15;; GNU Emacs is free software; you can redistribute it and/or modify
16;; it under the terms of the GNU General Public License as published by
17;; the Free Software Foundation; either version 2, or (at your option)
18;; any later version.
19
20;; GNU Emacs is distributed in the hope that it will be useful,
21;; but WITHOUT ANY WARRANTY; without even the implied warranty of
22;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
23;; GNU General Public License for more details.
24
25;; You should have received a copy of the GNU General Public License
26;; along with GNU Emacs; see the file COPYING.  If not, write to the
27;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
28;; Boston, MA 02110-1301, USA.
29
30;;; Commentary:
31
32;;; Code:
33
34(require 'nnheader)
35(require 'message)
36(require 'nnmail)
37(require 'nnoo)
38(eval-when-compile (require 'cl))
39(require 'gnus)
40(require 'gnus-util)
41(require 'gnus-range)
42
43(eval-and-compile
44  (autoload 'gnus-article-unpropagatable-p "gnus-sum")
45  (autoload 'gnus-intersection "gnus-range"))
46
47(nnoo-declare nnfolder)
48
49(defvoo nnfolder-directory (expand-file-name message-directory)
50  "The name of the nnfolder directory.")
51
52(defvoo nnfolder-nov-directory nil
53  "The name of the nnfolder NOV directory.
54If nil, `nnfolder-directory' is used.")
55
56(defvoo nnfolder-marks-directory nil
57  "The name of the nnfolder MARKS directory.
58If nil, `nnfolder-directory' is used.")
59
60(defvoo nnfolder-active-file
61    (nnheader-concat nnfolder-directory "active")
62  "The name of the active file.")
63
64;; I renamed this variable to something more in keeping with the general GNU
65;; style. -SLB
66
67(defvoo nnfolder-ignore-active-file nil
68  "If non-nil, the active file is ignored.
69This causes nnfolder to do some extra work in order to determine the
70true active ranges of an mbox file.  Note that the active file is
71still saved, but its values are not used.  This costs some extra time
72when scanning an mbox when opening it.")
73
74(defvoo nnfolder-distrust-mbox nil
75  "If non-nil, the folder will be distrusted.
76This means that nnfolder will not trust the user with respect to
77inserting unaccounted for mail in the middle of an mbox file.  This
78can greatly slow down scans, which now must scan the entire file for
79unmarked messages.  When nil, scans occur forward from the last marked
80message, a huge time saver for large mailboxes.")
81
82(defvoo nnfolder-newsgroups-file
83    (concat (file-name-as-directory nnfolder-directory) "newsgroups")
84  "Mail newsgroups description file.")
85
86(defvoo nnfolder-get-new-mail t
87  "If non-nil, nnfolder will check the incoming mail file and split the mail.")
88
89(defvoo nnfolder-prepare-save-mail-hook nil
90  "Hook run narrowed to an article before saving.")
91
92(defvoo nnfolder-save-buffer-hook nil
93  "Hook run before saving the nnfolder mbox buffer.")
94
95
96(defvoo nnfolder-inhibit-expiry nil
97  "If non-nil, inhibit expiry.")
98
99
100
101(defconst nnfolder-version "nnfolder 2.0"
102  "nnfolder version.")
103
104(defconst nnfolder-article-marker "X-Gnus-Article-Number: "
105  "String used to demarcate what the article number for a message is.")
106
107(defvoo nnfolder-current-group nil)
108(defvoo nnfolder-current-buffer nil)
109(defvoo nnfolder-status-string "")
110(defvoo nnfolder-group-alist nil)
111(defvoo nnfolder-buffer-alist nil)
112(defvoo nnfolder-scantime-alist nil)
113(defvoo nnfolder-active-timestamp nil)
114(defvoo nnfolder-active-file-coding-system mm-text-coding-system)
115(defvoo nnfolder-active-file-coding-system-for-write
116    nnmail-active-file-coding-system)
117(defvoo nnfolder-file-coding-system mm-text-coding-system)
118(defvoo nnfolder-file-coding-system-for-write nnheader-file-coding-system
119  "Coding system for save nnfolder file.
120if nil, `nnfolder-file-coding-system' is used.") ; FIXME: fill-in the doc-string of this variable
121
122(defvoo nnfolder-nov-is-evil nil
123  "If non-nil, Gnus will never generate and use nov databases for mail groups.
124Using nov databases will speed up header fetching considerably.
125This variable shouldn't be flipped much.  If you have, for some reason,
126set this to t, and want to set it to nil again, you should always run
127the `nnfolder-generate-active-file' command.  The function will go
128through all nnfolder directories and generate nov databases for them
129all.  This may very well take some time.")
130
131(defvoo nnfolder-nov-file-suffix ".nov")
132
133(defvoo nnfolder-nov-buffer-alist nil)
134
135(defvar nnfolder-nov-buffer-file-name nil)
136
137(defvoo nnfolder-marks-is-evil nil
138  "If non-nil, Gnus will never generate and use marks file for mail groups.
139Using marks files makes it possible to backup and restore mail groups
140separately from `.newsrc.eld'.  If you have, for some reason, set
141this to t, and want to set it to nil again, you should always remove
142the corresponding marks file (usually base nnfolder file name
143concatenated with `.mrk', but see `nnfolder-marks-file-suffix') for
144the group.  Then the marks file will be regenerated properly by Gnus.")
145
146(defvoo nnfolder-marks nil)
147
148(defvoo nnfolder-marks-file-suffix ".mrk")
149
150(defvar nnfolder-marks-modtime (gnus-make-hashtable))
151
152
153
154;;; Interface functions
155
156(nnoo-define-basics nnfolder)
157
158(deffoo nnfolder-retrieve-headers (articles &optional group server fetch-old)
159  (save-excursion
160    (set-buffer nntp-server-buffer)
161    (erase-buffer)
162    (let (article start stop num)
163      (nnfolder-possibly-change-group group server)
164      (when nnfolder-current-buffer
165	(set-buffer nnfolder-current-buffer)
166	(goto-char (point-min))
167	(if (stringp (car articles))
168	    'headers
169	  (if (nnfolder-retrieve-headers-with-nov articles fetch-old)
170	      'nov
171	    (setq articles (gnus-sorted-intersection
172			    ;; Is ARTICLES sorted?
173			    (sort articles '<)
174			    (nnfolder-existing-articles)))
175	    (while (setq article (pop articles))
176	      (set-buffer nnfolder-current-buffer)
177	      (cond ((nnfolder-goto-article article)
178		     (setq start (point))
179		     (setq stop (if (search-forward "\n\n" nil t)
180				    (1- (point))
181				  (point-max)))
182		     (set-buffer nntp-server-buffer)
183		     (insert (format "221 %d Article retrieved.\n" article))
184		     (insert-buffer-substring nnfolder-current-buffer
185					      start stop)
186		     (goto-char (point-max))
187		     (insert ".\n"))
188
189		    ;; If we couldn't find this article, skip over ranges
190		    ;; of missing articles so we don't search the whole file
191		    ;; for each of them.
192		    ((numberp article)
193		     (setq start (point))
194		     (and
195		      ;; Check that we are either at BOF or after an
196		      ;; article with a lower number.  We do this so we
197		      ;; won't be confused by out-of-order article numbers,
198		      ;; as caused by active file bogosity.
199		      (cond
200		       ((bobp))
201		       ((search-backward (concat "\n" nnfolder-article-marker)
202					 nil t)
203			(goto-char (match-end 0))
204			(setq num (string-to-number
205				   (buffer-substring
206				    (point) (gnus-point-at-eol))))
207			(goto-char start)
208			(< num article)))
209		      ;; Check that we are before an article with a
210		      ;; higher number.
211		      (search-forward (concat "\n" nnfolder-article-marker)
212				      nil t)
213		      (progn
214			(setq num (string-to-number
215				   (buffer-substring
216				    (point) (gnus-point-at-eol))))
217			(> num article))
218		      ;; Discard any article numbers before the one we're
219		      ;; now looking at.
220		      (while (and articles
221				  (< (car articles) num))
222			(setq articles (cdr articles))))
223		     (goto-char start))))
224	    (set-buffer nntp-server-buffer)
225	    (nnheader-fold-continuation-lines)
226	    'headers))))))
227
228(deffoo nnfolder-open-server (server &optional defs)
229  (nnoo-change-server 'nnfolder server defs)
230  (nnmail-activate 'nnfolder t)
231  (gnus-make-directory nnfolder-directory)
232  (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
233    (and nnfolder-nov-directory
234	 (gnus-make-directory nnfolder-nov-directory)))
235  (unless nnfolder-marks-is-evil
236    (and nnfolder-marks-directory
237	 (gnus-make-directory nnfolder-marks-directory)))
238  (cond
239   ((not (file-exists-p nnfolder-directory))
240    (nnfolder-close-server)
241    (nnheader-report 'nnfolder "Couldn't create directory: %s"
242		     nnfolder-directory))
243   ((not (file-directory-p (file-truename nnfolder-directory)))
244    (nnfolder-close-server)
245    (nnheader-report 'nnfolder "Not a directory: %s" nnfolder-directory))
246   (t
247    (nnmail-activate 'nnfolder)
248    (nnheader-report 'nnfolder "Opened server %s using directory %s"
249		     server nnfolder-directory)
250    t)))
251
252(deffoo nnfolder-request-close ()
253  (let ((alist nnfolder-buffer-alist))
254    (while alist
255      (nnfolder-close-group (caar alist) nil t)
256      (setq alist (cdr alist))))
257  (nnoo-close-server 'nnfolder)
258  (setq nnfolder-buffer-alist nil
259	nnfolder-group-alist nil))
260
261(deffoo nnfolder-request-article (article &optional group server buffer)
262  (nnfolder-possibly-change-group group server)
263  (save-excursion
264    (set-buffer nnfolder-current-buffer)
265    (goto-char (point-min))
266    (when (nnfolder-goto-article article)
267      (let (start stop)
268	(setq start (point))
269	(forward-line 1)
270	(unless (and (nnmail-search-unix-mail-delim)
271		     (forward-line -1))
272	  (goto-char (point-max)))
273	(setq stop (point))
274	(let ((nntp-server-buffer (or buffer nntp-server-buffer)))
275	  (set-buffer nntp-server-buffer)
276	  (erase-buffer)
277	  (insert-buffer-substring nnfolder-current-buffer start stop)
278	  (goto-char (point-min))
279	  (while (looking-at "From ")
280	    (delete-char 5)
281	    (insert "X-From-Line: ")
282	    (forward-line 1))
283	  (if (numberp article)
284	      (cons nnfolder-current-group article)
285	    (goto-char (point-min))
286	    (cons nnfolder-current-group
287		  (if (search-forward (concat "\n" nnfolder-article-marker)
288				      nil t)
289		      (string-to-number (buffer-substring
290				      (point) (gnus-point-at-eol)))
291		    -1))))))))
292
293(deffoo nnfolder-request-group (group &optional server dont-check)
294  (nnfolder-possibly-change-group group server t)
295  (save-excursion
296    (if (not (assoc group nnfolder-group-alist))
297	(nnheader-report 'nnfolder "No such group: %s" group)
298      (if dont-check
299	  (progn
300	    (nnheader-report 'nnfolder "Selected group %s" group)
301	    t)
302	(let* ((active (assoc group nnfolder-group-alist))
303	       (group (car active))
304	       (range (cadr active)))
305	  (cond
306	   ((null active)
307	    (nnheader-report 'nnfolder "No such group: %s" group))
308	   ((null nnfolder-current-group)
309	    (nnheader-report 'nnfolder "Empty group: %s" group))
310	   (t
311	    (nnheader-report 'nnfolder "Selected group %s" group)
312	    (nnheader-insert "211 %d %d %d %s\n"
313			     (1+ (- (cdr range) (car range)))
314			     (car range) (cdr range) group))))))))
315
316(deffoo nnfolder-request-scan (&optional group server)
317  (nnfolder-possibly-change-group nil server)
318  (when nnfolder-get-new-mail
319    (nnfolder-possibly-change-group group server)
320    (nnmail-get-new-mail
321     'nnfolder
322     (lambda ()
323       (let ((bufs nnfolder-buffer-alist))
324	 (save-excursion
325	   (while bufs
326	     (if (not (gnus-buffer-live-p (nth 1 (car bufs))))
327		 (setq nnfolder-buffer-alist
328		       (delq (car bufs) nnfolder-buffer-alist))
329	       (set-buffer (nth 1 (car bufs)))
330	       (nnfolder-save-buffer)
331	       (kill-buffer (current-buffer)))
332	     (setq bufs (cdr bufs))))))
333     nnfolder-directory
334     group)))
335
336;; Don't close the buffer if we're not shutting down the server.  This way,
337;; we can keep the buffer in the group buffer cache, and not have to grovel
338;; over the buffer again unless we add new mail to it or modify it in some
339;; way.
340
341(deffoo nnfolder-close-group (group &optional server force)
342  ;; Make sure we _had_ the group open.
343  (when (or (assoc group nnfolder-buffer-alist)
344	    (equal group nnfolder-current-group))
345    (let ((inf (assoc group nnfolder-buffer-alist)))
346      (when inf
347	(when (and nnfolder-current-group
348		   nnfolder-current-buffer)
349	  (push (list nnfolder-current-group nnfolder-current-buffer)
350		nnfolder-buffer-alist))
351	(setq nnfolder-buffer-alist
352	      (delq inf nnfolder-buffer-alist))
353	(setq nnfolder-current-buffer (cadr inf)
354	      nnfolder-current-group (car inf))))
355    (when (and nnfolder-current-buffer
356	       (buffer-name nnfolder-current-buffer))
357      (save-excursion
358	(set-buffer nnfolder-current-buffer)
359	;; If the buffer was modified, write the file out now.
360	(nnfolder-save-buffer)
361	;; If we're shutting the server down, we need to kill the
362	;; buffer and remove it from the open buffer list.  Or, of
363	;; course, if we're trying to minimize our space impact.
364	(kill-buffer (current-buffer))
365	(setq nnfolder-buffer-alist (delq (assoc group nnfolder-buffer-alist)
366					  nnfolder-buffer-alist)))))
367  (setq nnfolder-current-group nil
368	nnfolder-current-buffer nil)
369  t)
370
371(deffoo nnfolder-request-create-group (group &optional server args)
372  (nnfolder-possibly-change-group nil server)
373  (nnmail-activate 'nnfolder)
374  (when (and group
375	     (not (assoc group nnfolder-group-alist)))
376    (push (list group (cons 1 0)) nnfolder-group-alist)
377    (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
378    (save-current-buffer
379      (nnfolder-read-folder group)))
380  t)
381
382(deffoo nnfolder-request-list (&optional server)
383  (nnfolder-possibly-change-group nil server)
384  (save-excursion
385    (let ((nnmail-file-coding-system nnfolder-active-file-coding-system))
386      (nnmail-find-file nnfolder-active-file)
387      (setq nnfolder-group-alist (nnmail-get-active)))
388    t))
389
390(deffoo nnfolder-request-newgroups (date &optional server)
391  (nnfolder-possibly-change-group nil server)
392  (nnfolder-request-list server))
393
394(deffoo nnfolder-request-list-newsgroups (&optional server)
395  (nnfolder-possibly-change-group nil server)
396  (save-excursion
397    (let ((nnmail-file-coding-system nnfolder-file-coding-system))
398      (nnmail-find-file nnfolder-newsgroups-file))))
399
400;; Return a list consisting of all article numbers existing in the
401;; current folder.
402
403(defun nnfolder-existing-articles ()
404  (save-excursion
405    (when nnfolder-current-buffer
406      (set-buffer nnfolder-current-buffer)
407      (goto-char (point-min))
408      (let ((marker (concat "\n" nnfolder-article-marker))
409	    (number "[0-9]+")
410	    numbers)
411	(while (and (search-forward marker nil t)
412		    (re-search-forward number nil t))
413	  (let ((newnum (string-to-number (match-string 0))))
414	    (if (nnmail-within-headers-p)
415		(push newnum numbers))))
416      ;; The article numbers are increasing, so this result is sorted.
417	(nreverse numbers)))))
418
419(deffoo nnfolder-request-expire-articles
420    (articles newsgroup &optional server force)
421  (nnfolder-possibly-change-group newsgroup server)
422  (let* ((is-old t)
423	 ;; The articles we have deleted so far.
424	 (deleted-articles nil)
425	 ;; The articles that really exist and will
426	 ;; be expired if they are old enough.
427	 (maybe-expirable
428	  (gnus-sorted-intersection articles (nnfolder-existing-articles))))
429    (nnmail-activate 'nnfolder)
430
431    (save-excursion
432      (set-buffer nnfolder-current-buffer)
433      ;; Since messages are sorted in arrival order and expired in the
434      ;; same order, we can stop as soon as we find a message that is
435      ;; too old.
436      (while (and maybe-expirable is-old)
437	(goto-char (point-min))
438	(when (and (nnfolder-goto-article (car maybe-expirable))
439		   (search-forward (concat "\n" nnfolder-article-marker)
440				   nil t))
441	  (forward-sexp)
442	  (when (setq is-old
443		      (nnmail-expired-article-p
444		       newsgroup
445		       (buffer-substring
446			(point) (progn (end-of-line) (point)))
447		       force nnfolder-inhibit-expiry))
448	    (unless (eq nnmail-expiry-target 'delete)
449	      (with-temp-buffer
450		(nnfolder-request-article (car maybe-expirable)
451					  newsgroup server (current-buffer))
452		(let ((nnfolder-current-directory nil))
453		  (nnmail-expiry-target-group
454		   nnmail-expiry-target newsgroup)))
455	      (nnfolder-possibly-change-group newsgroup server))
456	    (nnheader-message 5 "Deleting article %d in %s..."
457			      (car maybe-expirable) newsgroup)
458	    (nnfolder-delete-mail)
459	    (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
460	      (nnfolder-nov-delete-article newsgroup (car maybe-expirable)))
461	    ;; Must remember which articles were actually deleted
462	    (push (car maybe-expirable) deleted-articles)))
463	(setq maybe-expirable (cdr maybe-expirable)))
464      (unless nnfolder-inhibit-expiry
465	(nnheader-message 5 "Deleting articles...done"))
466      (nnfolder-save-buffer)
467      (nnfolder-adjust-min-active newsgroup)
468      (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
469      (gnus-sorted-difference articles (nreverse deleted-articles)))))
470
471(deffoo nnfolder-request-move-article (article group server
472					       accept-form &optional last)
473  (save-excursion
474    (let ((buf (get-buffer-create " *nnfolder move*"))
475	  result)
476      (and
477       (nnfolder-request-article article group server)
478       (save-excursion
479	 (set-buffer buf)
480	 (erase-buffer)
481	 (insert-buffer-substring nntp-server-buffer)
482	 (goto-char (point-min))
483	 (while (re-search-forward
484		 (concat "^" nnfolder-article-marker)
485		 (save-excursion (and (search-forward "\n\n" nil t) (point)))
486		 t)
487	   (gnus-delete-line))
488	 (setq result (eval accept-form))
489	 (kill-buffer buf)
490	 result)
491       (save-excursion
492	 (nnfolder-possibly-change-group group server)
493	 (set-buffer nnfolder-current-buffer)
494	 (goto-char (point-min))
495	 (when (nnfolder-goto-article article)
496	   (nnfolder-delete-mail))
497	 (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
498	   (nnfolder-nov-delete-article group article))
499	 (when last
500	   (nnfolder-save-buffer)
501	   (nnfolder-adjust-min-active group)
502	   (nnfolder-save-active nnfolder-group-alist nnfolder-active-file))))
503      result)))
504
505(deffoo nnfolder-request-accept-article (group &optional server last)
506  (save-excursion
507    (nnfolder-possibly-change-group group server)
508    (nnmail-check-syntax)
509    (let ((buf (current-buffer))
510	  result art-group)
511      (goto-char (point-min))
512      (when (looking-at "X-From-Line: ")
513	(replace-match "From ")
514	(while (progn (forward-line) (looking-at "[ \t]"))
515	  (delete-char -1)))
516      (with-temp-buffer
517	(let ((nnmail-file-coding-system nnfolder-active-file-coding-system)
518	      (nntp-server-buffer (current-buffer)))
519	  (nnmail-find-file nnfolder-active-file)
520	  (setq nnfolder-group-alist (nnmail-parse-active))))
521      (save-excursion
522	(goto-char (point-min))
523	(if (search-forward "\n\n" nil t)
524	    (forward-line -1)
525	  (goto-char (point-max)))
526	(while (re-search-backward (concat "^" nnfolder-article-marker) nil t)
527	  (delete-region (point) (progn (forward-line 1) (point))))
528	(when nnmail-cache-accepted-message-ids
529	  (nnmail-cache-insert (nnmail-fetch-field "message-id")
530			       group
531			       (nnmail-fetch-field "subject")
532			       (nnmail-fetch-field "from")))
533	(setq result (if (stringp group)
534			 (list (cons group (nnfolder-active-number group)))
535		       (setq art-group
536			     (nnmail-article-group 'nnfolder-active-number))))
537	(if (and (null result)
538		 (yes-or-no-p "Moved to `junk' group; delete article? "))
539	    (setq result 'junk)
540	  (setq result
541		(car (nnfolder-save-mail result)))))
542      (when last
543	(save-excursion
544	  (nnfolder-possibly-change-folder (or (caar art-group) group))
545	  (nnfolder-save-buffer)
546	  (when nnmail-cache-accepted-message-ids
547	    (nnmail-cache-close))))
548      (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
549      (unless result
550	(nnheader-report 'nnfolder "Couldn't store article"))
551      result)))
552
553(deffoo nnfolder-request-replace-article (article group buffer)
554  (nnfolder-possibly-change-group group)
555  (save-excursion
556    (set-buffer buffer)
557    (goto-char (point-min))
558    (if (not (looking-at "X-From-Line: "))
559	(insert "From nobody " (current-time-string) "\n")
560      (replace-match "From ")
561      (forward-line 1)
562      (while (looking-at "[ \t]")
563	(delete-char -1)
564	(forward-line 1)))
565    (nnfolder-normalize-buffer)
566    (set-buffer nnfolder-current-buffer)
567    (goto-char (point-min))
568    (if (not (nnfolder-goto-article article))
569	nil
570      (nnfolder-delete-mail)
571      (insert-buffer-substring buffer)
572      (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
573	(save-excursion
574	  (set-buffer buffer)
575	  (let ((headers (nnfolder-parse-head article
576					      (point-min) (point-max))))
577	    (with-current-buffer (nnfolder-open-nov group)
578	      (if (nnheader-find-nov-line article)
579		  (delete-region (point) (progn (forward-line 1) (point))))
580	      (nnheader-insert-nov headers)))))
581      (nnfolder-save-buffer)
582      t)))
583
584(deffoo nnfolder-request-delete-group (group &optional force server)
585  (nnfolder-close-group group server t)
586  ;; Delete all articles in GROUP.
587  (if (not force)
588      ()				; Don't delete the articles.
589    ;; Delete the file that holds the group.
590    (let ((data (nnfolder-group-pathname group))
591	  (nov (nnfolder-group-nov-pathname group))
592	  (mrk (nnfolder-group-marks-pathname group)))
593      (ignore-errors (delete-file data))
594      (ignore-errors (delete-file nov))
595      (ignore-errors (delete-file mrk))))
596  ;; Remove the group from all structures.
597  (setq nnfolder-group-alist
598	(delq (assoc group nnfolder-group-alist) nnfolder-group-alist)
599	nnfolder-current-group nil
600	nnfolder-current-buffer nil)
601  ;; Save the active file.
602  (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
603  t)
604
605(deffoo nnfolder-request-rename-group (group new-name &optional server)
606  (nnfolder-possibly-change-group group server)
607  (save-excursion
608    (set-buffer nnfolder-current-buffer)
609    (and (file-writable-p buffer-file-name)
610	 (ignore-errors
611	   (let ((new-file (nnfolder-group-pathname new-name)))
612	     (gnus-make-directory (file-name-directory new-file))
613	     (rename-file buffer-file-name new-file)
614	     (when (file-exists-p (nnfolder-group-nov-pathname group))
615	       (setq new-file (nnfolder-group-nov-pathname new-name))
616	       (gnus-make-directory (file-name-directory new-file))
617	       (rename-file (nnfolder-group-nov-pathname group) new-file))
618	     (when (file-exists-p (nnfolder-group-marks-pathname group))
619	       (setq new-file (nnfolder-group-marks-pathname new-name))
620	       (gnus-make-directory (file-name-directory new-file))
621	       (rename-file (nnfolder-group-marks-pathname group) new-file)))
622	   t)
623	 ;; That went ok, so we change the internal structures.
624	 (let ((entry (assoc group nnfolder-group-alist)))
625	   (and entry (setcar entry new-name))
626	   (setq nnfolder-current-buffer nil
627		 nnfolder-current-group nil)
628	   ;; Save the new group alist.
629	   (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
630	   ;; We kill the buffer instead of renaming it and stuff.
631	   (kill-buffer (current-buffer))
632	   t))))
633
634(deffoo nnfolder-request-regenerate (server)
635  (nnfolder-possibly-change-group nil server)
636  (nnfolder-generate-active-file)
637  t)
638
639
640;;; Internal functions.
641
642(defun nnfolder-adjust-min-active (group)
643  ;; Find the lowest active article in this group.
644  (let* ((active (cadr (assoc group nnfolder-group-alist)))
645	 (marker (concat "\n" nnfolder-article-marker))
646	 (number "[0-9]+")
647	 (activemin (cdr active)))
648    (save-excursion
649      (set-buffer nnfolder-current-buffer)
650      (goto-char (point-min))
651      (while (and (search-forward marker nil t)
652		  (re-search-forward number nil t))
653	(let ((newnum (string-to-number (match-string 0))))
654	  (if (nnmail-within-headers-p)
655	      (setq activemin (min activemin newnum)))))
656      (setcar active activemin))))
657
658(defun nnfolder-article-string (article)
659  (if (numberp article)
660      (concat "\n" nnfolder-article-marker (int-to-string article) " ")
661    (concat "\nMessage-ID: " article)))
662
663(defun nnfolder-goto-article (article)
664  "Place point at the start of the headers of ARTICLE.
665ARTICLE can be an article number or a Message-ID.
666Returns t if successful, nil otherwise."
667  (let ((art-string (nnfolder-article-string article))
668	start found)
669    ;; It is likely that we are at or before the delimiter line.
670    ;; We therefore go to the end of the previous line, and start
671    ;; searching from there.
672    (beginning-of-line)
673    (unless (bobp)
674      (forward-char -1))
675    (setq start (point))
676    ;; First search forward.
677    (while (and (setq found (search-forward art-string nil t))
678		(not (nnmail-within-headers-p))))
679    ;; If unsuccessful, search backward from where we started,
680    (unless found
681      (goto-char start)
682      (while (and (setq found (search-backward art-string nil t))
683		  (not (nnmail-within-headers-p)))))
684    (when found
685      (nnmail-search-unix-mail-delim-backward))))
686
687(defun nnfolder-delete-mail (&optional leave-delim)
688  "Delete the message that point is in.
689If optional argument LEAVE-DELIM is t, then mailbox delimiter is not
690deleted.  Point is left where the deleted region was."
691  (save-restriction
692    (narrow-to-region
693     (save-excursion
694       ;; In case point is at the beginning of the message already.
695       (forward-line 1)
696       (nnmail-search-unix-mail-delim-backward)
697       (if leave-delim (progn (forward-line 1) (point))
698	 (point)))
699     (progn
700       (forward-line 1)
701       (if (nnmail-search-unix-mail-delim)
702	   (point)
703	 (point-max))))
704    (run-hooks 'nnfolder-delete-mail-hook)
705    (delete-region (point-min) (point-max))))
706
707(defun nnfolder-possibly-change-group (group &optional server dont-check)
708  ;; Change servers.
709  (when (and server
710	     (not (nnfolder-server-opened server)))
711    (nnfolder-open-server server))
712  (unless (gnus-buffer-live-p nnfolder-current-buffer)
713    (setq nnfolder-current-buffer nil
714	  nnfolder-current-group nil))
715  ;; Change group.
716  (let ((file-name-coding-system nnmail-pathname-coding-system))
717    (when (and group
718	       (not (equal group nnfolder-current-group))
719	       (progn
720		 (nnmail-activate 'nnfolder)
721		 (and (assoc group nnfolder-group-alist)
722		      (file-exists-p (nnfolder-group-pathname group)))))
723      (if dont-check
724	  (setq nnfolder-current-group group
725		nnfolder-current-buffer nil)
726	(let (inf file)
727	  ;; If we have to change groups, see if we don't already have
728	  ;; the folder in memory.  If we do, verify the modtime and
729	  ;; destroy the folder if needed so we can rescan it.
730	  (setq nnfolder-current-buffer
731		(nth 1 (assoc group nnfolder-buffer-alist)))
732
733	  ;; If the buffer is not live, make sure it isn't in the
734	  ;; alist.  If it is live, verify that nobody else has
735	  ;; touched the file since last time.
736	  (when (and nnfolder-current-buffer
737		     (not (gnus-buffer-live-p nnfolder-current-buffer)))
738	    (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)
739		  nnfolder-current-buffer nil))
740
741	  (setq nnfolder-current-group group)
742
743	  (when (or (not nnfolder-current-buffer)
744		    (not (verify-visited-file-modtime
745			  nnfolder-current-buffer)))
746	    (save-excursion
747	      (setq file (nnfolder-group-pathname group))
748	      ;; See whether we need to create the new file.
749	      (unless (file-exists-p file)
750		(gnus-make-directory (file-name-directory file))
751		(let ((nnmail-file-coding-system
752		       (or nnfolder-file-coding-system-for-write
753			   nnfolder-file-coding-system-for-write)))
754		  (nnmail-write-region (point-min) (point-min)
755				       file t 'nomesg)))
756	      (when (setq nnfolder-current-buffer (nnfolder-read-folder group))
757		(set-buffer nnfolder-current-buffer)
758		(push (list group nnfolder-current-buffer)
759		      nnfolder-buffer-alist)))))))))
760
761(defun nnfolder-save-mail (group-art-list)
762  "Called narrowed to an article."
763  (let* (save-list group-art)
764    (goto-char (point-min))
765    ;; The From line may have been quoted by movemail.
766    (when (looking-at ">From")
767      (delete-char 1))
768    ;; This might come from somewhere else.
769    (unless (looking-at "From ")
770      (insert "From nobody " (current-time-string) "\n")
771      (goto-char (point-min)))
772    ;; Quote all "From " lines in the article.
773    (forward-line 1)
774    (let (case-fold-search)
775      (while (re-search-forward "^From " nil t)
776	(beginning-of-line)
777	(insert "> ")))
778    (setq save-list group-art-list)
779    (nnmail-insert-lines)
780    (nnmail-insert-xref group-art-list)
781    (run-hooks 'nnmail-prepare-save-mail-hook)
782    (run-hooks 'nnfolder-prepare-save-mail-hook)
783
784    ;; Insert the mail into each of the destination groups.
785    (while (setq group-art (pop group-art-list))
786      ;; Kill any previous newsgroup markers.
787      (goto-char (point-min))
788      (if (search-forward "\n\n" nil t)
789	  (forward-line -1)
790	(goto-char (point-max)))
791      (while (search-backward (concat "\n" nnfolder-article-marker) nil t)
792	(delete-region (1+ (point)) (progn (forward-line 2) (point))))
793
794      ;; Insert the new newsgroup marker.
795      (nnfolder-insert-newsgroup-line group-art)
796
797      (save-excursion
798	(let ((beg (point-min))
799	      (end (point-max))
800	      (obuf (current-buffer)))
801	  (nnfolder-possibly-change-folder (car group-art))
802	  (let ((buffer-read-only nil))
803	    (nnfolder-normalize-buffer)
804	    (insert-buffer-substring obuf beg end))
805	  (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
806	    (set-buffer obuf)
807	    (nnfolder-add-nov (car group-art) (cdr group-art)
808			      (nnfolder-parse-head nil beg end))))))
809
810    ;; Did we save it anywhere?
811    save-list))
812
813(defun nnfolder-normalize-buffer ()
814  "Make sure there are two newlines at the end of the buffer."
815  (goto-char (point-max))
816  (skip-chars-backward "\n")
817  (delete-region (point) (point-max))
818  (unless (bobp)
819    (insert "\n\n")))
820
821(defun nnfolder-insert-newsgroup-line (group-art)
822  (save-excursion
823    (goto-char (point-min))
824    (unless (search-forward "\n\n" nil t)
825      (goto-char (point-max))
826      (insert "\n"))
827    (forward-char -1)
828    (insert (format (concat nnfolder-article-marker "%d   %s\n")
829		    (cdr group-art) (message-make-date)))))
830
831(defun nnfolder-active-number (group)
832  ;; Find the next article number in GROUP.
833  (let ((active (cadr (assoc group nnfolder-group-alist))))
834    (if active
835	(setcdr active (1+ (cdr active)))
836      ;; This group is new, so we create a new entry for it.
837      ;; This might be a bit naughty... creating groups on the drop of
838      ;; a hat, but I don't know...
839      (push (list group (setq active (cons 1 1)))
840	    nnfolder-group-alist))
841    (cdr active)))
842
843(defun nnfolder-possibly-change-folder (group)
844  (let ((inf (assoc group nnfolder-buffer-alist)))
845    (if (and inf
846	     (gnus-buffer-live-p (cadr inf)))
847	(set-buffer (cadr inf))
848      (when inf
849	(setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)))
850      (when nnfolder-group-alist
851	(nnfolder-save-active nnfolder-group-alist nnfolder-active-file))
852      (push (list group (nnfolder-read-folder group))
853	    nnfolder-buffer-alist))))
854
855;; This method has a problem if you've accidentally let the active
856;; list get out of sync with the files.  This could happen, say, if
857;; you've accidentally gotten new mail with something other than Gnus
858;; (but why would _that_ ever happen? :-).  In that case, we will be
859;; in the middle of processing the file, ready to add new X-Gnus
860;; article number markers, and we'll run across a message with no ID
861;; yet - the active list _may_not_ be ready for us yet.
862
863;; To handle this, I'm modifying this routine to maintain the maximum
864;; ID seen so far, and when we hit a message with no ID, we will
865;; _manually_ scan the rest of the message looking for any more,
866;; possibly higher IDs.  We'll assume the maximum that we find is the
867;; highest active.  Note that this shouldn't cost us much extra time
868;; at all, but will be a lot less vulnerable to glitches between the
869;; mbox and the active file.
870
871(defun nnfolder-read-folder (group)
872  (let* ((file (nnfolder-group-pathname group))
873	 (nov  (nnfolder-group-nov-pathname group))
874	 (buffer (set-buffer
875		  (let ((nnheader-file-coding-system
876			 nnfolder-file-coding-system))
877		    (nnheader-find-file-noselect file t)))))
878    (mm-enable-multibyte) ;; Use multibyte buffer for future copying.
879    (buffer-disable-undo)
880    (if (equal (cadr (assoc group nnfolder-scantime-alist))
881	       (nth 5 (file-attributes file)))
882	;; This looks up-to-date, so we don't do any scanning.
883	(if (file-exists-p file)
884	    buffer
885	  (push (list group buffer) nnfolder-buffer-alist)
886	  (set-buffer-modified-p t)
887	  (nnfolder-save-buffer))
888      ;; Parse the damn thing.
889      (save-excursion
890	(goto-char (point-min))
891	;; Remove any blank lines at the start.
892	(while (eq (following-char) ?\n)
893	  (delete-char 1))
894	(nnmail-activate 'nnfolder)
895	;; Read in the file.
896	(let ((delim "^From ")
897	      (marker (concat "\n" nnfolder-article-marker))
898	      (number "[0-9]+")
899	      (active (or (cadr (assoc group nnfolder-group-alist))
900			  (cons 1 0)))
901	      (scantime (assoc group nnfolder-scantime-alist))
902	      (minid (lsh -1 -1))
903	      maxid start end newscantime
904	      novbuf articles newnum
905	      buffer-read-only)
906	  (setq maxid (cdr active))
907
908	  (unless (or gnus-nov-is-evil nnfolder-nov-is-evil
909		      (and (file-exists-p nov)
910			   (file-newer-than-file-p nov file)))
911	    (unless (file-exists-p nov)
912	      (gnus-make-directory (file-name-directory nov)))
913	    (with-current-buffer
914		(setq novbuf (nnfolder-open-nov group))
915	      (goto-char (point-min))
916	      (while (not (eobp))
917		(push (read novbuf) articles)
918		(forward-line 1))
919	      (setq articles (nreverse articles))))
920	  (goto-char (point-min))
921
922	  ;; Anytime the active number is 1 or 0, it is suspect.  In
923	  ;; that case, search the file manually to find the active
924	  ;; number.  Or, of course, if we're being paranoid.  (This
925	  ;; would also be the place to build other lists from the
926	  ;; header markers, such as expunge lists, etc., if we ever
927	  ;; desired to abandon the active file entirely for mboxes.)
928	  (when (or nnfolder-ignore-active-file
929		    novbuf
930		    (< maxid 2))
931	    (while (and (search-forward marker nil t)
932			(looking-at number))
933	      (setq newnum (string-to-number (match-string 0)))
934	      (when (nnmail-within-headers-p)
935		(setq maxid (max maxid newnum)
936		      minid (min minid newnum))
937		(when novbuf
938		  (if (memq newnum articles)
939		      (setq articles (delq newnum articles))
940		    (let ((headers (nnfolder-parse-head newnum)))
941		      (with-current-buffer novbuf
942			(nnheader-find-nov-line newnum)
943			(nnheader-insert-nov headers)))))))
944	    (when (and novbuf articles)
945	      (with-current-buffer novbuf
946		(dolist (article articles)
947		  (when (nnheader-find-nov-line article)
948		    (delete-region (point)
949				   (progn (forward-line 1) (point)))))))
950	    (setcar active (max 1 (min minid maxid)))
951	    (setcdr active (max maxid (cdr active)))
952	    (goto-char (point-min)))
953
954	  ;; As long as we trust that the user will only insert
955	  ;; unmarked mail at the end, go to the end and search
956	  ;; backwards for the last marker.  Find the start of that
957	  ;; message, and begin to search for unmarked messages from
958	  ;; there.
959	  (when (not (or nnfolder-distrust-mbox
960			 (< maxid 2)))
961	    (goto-char (point-max))
962	    (unless (re-search-backward marker nil t)
963	      (goto-char (point-min)))
964	    ;;(when (nnmail-search-unix-mail-delim)
965	    ;;  (goto-char (point-min)))
966	    )
967
968	  ;; Keep track of the active number on our own, and insert it
969	  ;; back into the active list when we're done.  Also, prime
970	  ;; the pump to cut down on the number of searches we do.
971	  (unless (nnmail-search-unix-mail-delim)
972	    (goto-char (point-max)))
973	  (setq end (point-marker))
974	  (while (not (= end (point-max)))
975	    (setq start (marker-position end))
976	    (goto-char end)
977	   ;; There may be more than one "From " line, so we skip past
978	    ;; them.
979	    (while (looking-at delim)
980	      (forward-line 1))
981	    (set-marker end (if (nnmail-search-unix-mail-delim)
982				(point)
983			      (point-max)))
984	    (goto-char start)
985	    (when (not (search-forward marker end t))
986	      (narrow-to-region start end)
987	      (nnmail-insert-lines)
988	      (nnfolder-insert-newsgroup-line
989	       (cons nil
990		     (setq newnum
991			   (nnfolder-active-number group))))
992	      (when novbuf
993		(let ((headers (nnfolder-parse-head newnum (point-min)
994						    (point-max))))
995		  (with-current-buffer novbuf
996		    (goto-char (point-max))
997		    (nnheader-insert-nov headers))))
998	      (widen)))
999
1000	  (set-marker end nil)
1001	  ;; Make absolutely sure that the active list reflects
1002	  ;; reality!
1003	  (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
1004
1005	  ;; Set the scantime for this group.
1006	  (setq newscantime (visited-file-modtime))
1007	  (if scantime
1008	      (setcdr scantime (list newscantime))
1009	    (push (list group newscantime)
1010		  nnfolder-scantime-alist))
1011	  ;; Save nov.
1012	  (when novbuf
1013	    (nnfolder-save-nov))
1014	  (current-buffer))))))
1015
1016;;;###autoload
1017(defun nnfolder-generate-active-file ()
1018  "Look for mbox folders in the nnfolder directory and make them into groups.
1019This command does not work if you use short group names."
1020  (interactive)
1021  (nnmail-activate 'nnfolder)
1022  (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
1023    (dolist (file (directory-files (or nnfolder-nov-directory
1024				       nnfolder-directory)
1025				   t
1026				   (concat
1027				    (regexp-quote nnfolder-nov-file-suffix)
1028				    "$")))
1029      (when (not (message-mail-file-mbox-p file))
1030	(ignore-errors
1031	  (delete-file file)))))
1032  (let ((files (directory-files nnfolder-directory))
1033	file)
1034    (while (setq file (pop files))
1035      (when (and (not (backup-file-name-p file))
1036		 (message-mail-file-mbox-p
1037		  (nnheader-concat nnfolder-directory file)))
1038	(let ((oldgroup (assoc file nnfolder-group-alist)))
1039	  (if oldgroup
1040	      (nnheader-message 5 "Refreshing group %s..." file)
1041	    (nnheader-message 5 "Adding group %s..." file))
1042	  (if oldgroup
1043	      (setq nnfolder-group-alist
1044		    (delq oldgroup (copy-sequence nnfolder-group-alist))))
1045	  (push (list file (cons 1 0)) nnfolder-group-alist)
1046	  (nnfolder-possibly-change-folder file)
1047	  (nnfolder-possibly-change-group file)
1048	  (nnfolder-close-group file))))
1049    (nnheader-message 5 "")))
1050
1051(defun nnfolder-group-pathname (group)
1052  "Make file name for GROUP."
1053  (setq group
1054	(mm-encode-coding-string group nnmail-pathname-coding-system))
1055  (let ((dir (file-name-as-directory (expand-file-name nnfolder-directory))))
1056    ;; If this file exists, we use it directly.
1057    (if (or nnmail-use-long-file-names
1058	    (file-exists-p (concat dir group)))
1059	(concat dir group)
1060      ;; If not, we translate dots into slashes.
1061      (concat dir (nnheader-replace-chars-in-string group ?. ?/)))))
1062
1063(defun nnfolder-group-nov-pathname (group)
1064  "Make pathname for GROUP NOV."
1065  (let ((nnfolder-directory
1066	 (or nnfolder-nov-directory nnfolder-directory)))
1067    (concat (nnfolder-group-pathname group) nnfolder-nov-file-suffix)))
1068
1069(defun nnfolder-save-buffer ()
1070  "Save the buffer."
1071  (when (buffer-modified-p)
1072    (run-hooks 'nnfolder-save-buffer-hook)
1073    (gnus-make-directory (file-name-directory (buffer-file-name)))
1074    (let ((coding-system-for-write
1075	   (or nnfolder-file-coding-system-for-write
1076	       nnfolder-file-coding-system)))
1077      (save-buffer)))
1078  (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
1079    (nnfolder-save-nov)))
1080
1081(defun nnfolder-save-active (group-alist active-file)
1082  (let ((nnmail-active-file-coding-system
1083	 (or nnfolder-active-file-coding-system-for-write
1084	     nnfolder-active-file-coding-system)))
1085    (nnmail-save-active group-alist active-file)))
1086
1087(defun nnfolder-open-nov (group)
1088  (or (cdr (assoc group nnfolder-nov-buffer-alist))
1089      (let ((buffer (get-buffer-create (format " *nnfolder overview %s*" group))))
1090	(save-excursion
1091	  (set-buffer buffer)
1092	  (set (make-local-variable 'nnfolder-nov-buffer-file-name)
1093	       (nnfolder-group-nov-pathname group))
1094	  (erase-buffer)
1095	  (when (file-exists-p nnfolder-nov-buffer-file-name)
1096	    (nnheader-insert-file-contents nnfolder-nov-buffer-file-name)))
1097	(push (cons group buffer) nnfolder-nov-buffer-alist)
1098	buffer)))
1099
1100(defun nnfolder-save-nov ()
1101  (save-excursion
1102    (while nnfolder-nov-buffer-alist
1103      (when (buffer-name (cdar nnfolder-nov-buffer-alist))
1104	(set-buffer (cdar nnfolder-nov-buffer-alist))
1105	(when (buffer-modified-p)
1106	  (gnus-make-directory (file-name-directory
1107				nnfolder-nov-buffer-file-name))
1108	  (nnmail-write-region 1 (point-max) nnfolder-nov-buffer-file-name
1109			       nil 'nomesg))
1110	(set-buffer-modified-p nil)
1111	(kill-buffer (current-buffer)))
1112      (setq nnfolder-nov-buffer-alist (cdr nnfolder-nov-buffer-alist)))))
1113
1114(defun nnfolder-nov-delete-article (group article)
1115  (save-excursion
1116    (set-buffer (nnfolder-open-nov group))
1117    (when (nnheader-find-nov-line article)
1118      (delete-region (point) (progn (forward-line 1) (point))))
1119    t))
1120
1121(defun nnfolder-retrieve-headers-with-nov (articles &optional fetch-old)
1122  (if (or gnus-nov-is-evil nnfolder-nov-is-evil)
1123      nil
1124    (let ((nov (nnfolder-group-nov-pathname nnfolder-current-group)))
1125      (when (file-exists-p nov)
1126	(save-excursion
1127	  (set-buffer nntp-server-buffer)
1128	  (erase-buffer)
1129	  (nnheader-insert-file-contents nov)
1130	  (if (and fetch-old
1131		   (not (numberp fetch-old)))
1132	      t				; Don't remove anything.
1133	    (nnheader-nov-delete-outside-range
1134	     (if fetch-old (max 1 (- (car articles) fetch-old))
1135	       (car articles))
1136	     (car (last articles)))
1137	    t))))))
1138
1139(defun nnfolder-parse-head (&optional number b e)
1140  "Parse the head of the current buffer."
1141  (let ((buf (current-buffer))
1142	chars)
1143    (save-excursion
1144      (unless b
1145	(setq b (if (nnmail-search-unix-mail-delim-backward)
1146		    (point) (point-min)))
1147	(forward-line 1)
1148	(setq e (if (nnmail-search-unix-mail-delim)
1149		    (point) (point-max))))
1150      (setq chars (- e b))
1151      (unless (zerop chars)
1152	(goto-char b)
1153	(if (search-forward "\n\n" e t) (setq e (1- (point)))))
1154      (with-temp-buffer
1155	(insert-buffer-substring buf b e)
1156	(let ((headers (nnheader-parse-naked-head)))
1157	  (mail-header-set-chars headers chars)
1158	  (mail-header-set-number headers number)
1159	  headers)))))
1160
1161(defun nnfolder-add-nov (group article headers)
1162  "Add a nov line for the GROUP base."
1163  (save-excursion
1164    (set-buffer (nnfolder-open-nov group))
1165    (goto-char (point-max))
1166    (mail-header-set-number headers article)
1167    (nnheader-insert-nov headers)))
1168
1169(deffoo nnfolder-request-set-mark (group actions &optional server)
1170  (when (and server
1171	     (not (nnfolder-server-opened server)))
1172    (nnfolder-open-server server))
1173  (unless nnfolder-marks-is-evil
1174    (nnfolder-open-marks group server)
1175    (dolist (action actions)
1176      (let ((range (nth 0 action))
1177	    (what  (nth 1 action))
1178	    (marks (nth 2 action)))
1179	(assert (or (eq what 'add) (eq what 'del)) nil
1180		"Unknown request-set-mark action: %s" what)
1181	(dolist (mark marks)
1182	  (setq nnfolder-marks (gnus-update-alist-soft
1183			    mark
1184			    (funcall (if (eq what 'add) 'gnus-range-add
1185				       'gnus-remove-from-range)
1186				     (cdr (assoc mark nnfolder-marks)) range)
1187			    nnfolder-marks)))))
1188    (nnfolder-save-marks group server))
1189  nil)
1190
1191(deffoo nnfolder-request-update-info (group info &optional server)
1192  ;; Change servers.
1193  (when (and server
1194	     (not (nnfolder-server-opened server)))
1195    (nnfolder-open-server server))
1196  (when (and (not nnfolder-marks-is-evil) (nnfolder-marks-changed-p group))
1197    (nnheader-message 8 "Updating marks for %s..." group)
1198    (nnfolder-open-marks group server)
1199    ;; Update info using `nnfolder-marks'.
1200    (mapcar (lambda (pred)
1201	      (unless (memq (cdr pred) gnus-article-unpropagated-mark-lists)
1202		(gnus-info-set-marks
1203		 info
1204		 (gnus-update-alist-soft
1205		  (cdr pred)
1206		  (cdr (assq (cdr pred) nnfolder-marks))
1207		  (gnus-info-marks info))
1208		 t)))
1209	    gnus-article-mark-lists)
1210    (let ((seen (cdr (assq 'read nnfolder-marks))))
1211      (gnus-info-set-read info
1212			  (if (and (integerp (car seen))
1213				   (null (cdr seen)))
1214			      (list (cons (car seen) (car seen)))
1215			    seen)))
1216    (nnheader-message 8 "Updating marks for %s...done" group))
1217  info)
1218
1219(defun nnfolder-group-marks-pathname (group)
1220  "Make pathname for GROUP NOV."
1221  (let ((nnfolder-directory (or nnfolder-marks-directory nnfolder-directory)))
1222    (concat (nnfolder-group-pathname group) nnfolder-marks-file-suffix)))
1223
1224(defun nnfolder-marks-changed-p (group)
1225  (let ((file (nnfolder-group-marks-pathname group)))
1226    (if (null (gnus-gethash file nnfolder-marks-modtime))
1227	t ;; never looked at marks file, assume it has changed
1228      (not (equal (gnus-gethash file nnfolder-marks-modtime)
1229		  (nth 5 (file-attributes file)))))))
1230
1231(defun nnfolder-save-marks (group server)
1232  (let ((file-name-coding-system nnmail-pathname-coding-system)
1233	(file (nnfolder-group-marks-pathname group)))
1234    (condition-case err
1235	(progn
1236	  (with-temp-file file
1237	    (erase-buffer)
1238	    (gnus-prin1 nnfolder-marks)
1239	    (insert "\n"))
1240	  (gnus-sethash file
1241			(nth 5 (file-attributes file))
1242			nnfolder-marks-modtime))
1243      (error (or (gnus-yes-or-no-p
1244		  (format "Could not write to %s (%s).  Continue? " file err))
1245		 (error "Cannot write to %s (%s)" file err))))))
1246
1247(defun nnfolder-open-marks (group server)
1248  (let ((file (nnfolder-group-marks-pathname group)))
1249    (if (file-exists-p file)
1250	(condition-case err
1251	    (with-temp-buffer
1252	      (gnus-sethash file (nth 5 (file-attributes file))
1253			    nnfolder-marks-modtime)
1254	      (nnheader-insert-file-contents file)
1255	      (setq nnfolder-marks (read (current-buffer)))
1256	      (dolist (el gnus-article-unpropagated-mark-lists)
1257		(setq nnfolder-marks (gnus-remassoc el nnfolder-marks))))
1258	  (error (or (gnus-yes-or-no-p
1259		      (format "Error reading nnfolder marks file %s (%s).  Continuing will use marks from .newsrc.eld.  Continue? " file err))
1260		     (error "Cannot read nnfolder marks file %s (%s)" file err))))
1261      ;; User didn't have a .marks file.  Probably first time
1262      ;; user of the .marks stuff.  Bootstrap it from .newsrc.eld.
1263      (let ((info (gnus-get-info
1264		   (gnus-group-prefixed-name
1265		    group
1266		    (gnus-server-to-method (format "nnfolder:%s" server))))))
1267	(nnheader-message 7 "Bootstrapping marks for %s..." group)
1268	(setq nnfolder-marks (gnus-info-marks info))
1269	(push (cons 'read (gnus-info-read info)) nnfolder-marks)
1270	(dolist (el gnus-article-unpropagated-mark-lists)
1271	  (setq nnfolder-marks (gnus-remassoc el nnfolder-marks)))
1272	(nnfolder-save-marks group server)
1273	(nnheader-message 7 "Bootstrapping marks for %s...done" group)))))
1274
1275(provide 'nnfolder)
1276
1277;;; arch-tag: a040d0f4-4f4e-445f-8972-839575c5f7e6
1278;;; nnfolder.el ends here
1279