1 ;;; gnus-agent.el --- unplugged support for Gnus
2 ;; Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
5 ;; This file is part of GNU Emacs.
7 ;; GNU Emacs is free software; you can redistribute it and/or modify
8 ;; it under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation; either version 2, or (at your option)
12 ;; GNU Emacs is distributed in the hope that it will be useful,
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;; GNU General Public License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GNU Emacs; see the file COPYING. If not, write to the
19 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 ;; Boston, MA 02111-1307, USA.
32 (require 'gnus-score))
34 (defcustom gnus-agent-directory (nnheader-concat gnus-directory "agent/")
35 "Where the Gnus agent will store its files."
39 (defcustom gnus-agent-plugged-hook nil
40 "Hook run when plugging into the network."
44 (defcustom gnus-agent-unplugged-hook nil
45 "Hook run when unplugging from the network."
49 (defcustom gnus-agent-handle-level gnus-level-subscribed
50 "Groups on levels higher than this variable will be ignored by the Agent."
54 (defcustom gnus-agent-expire-days 7
55 "Read articles older than this will be expired."
59 (defcustom gnus-agent-expire-all nil
60 "If non-nil, also expire unread, ticked and dormant articles.
61 If nil, only read articles will be expired."
65 (defcustom gnus-agent-group-mode-hook nil
66 "Hook run in Agent group minor modes."
70 (defcustom gnus-agent-summary-mode-hook nil
71 "Hook run in Agent summary minor modes."
75 (defcustom gnus-agent-server-mode-hook nil
76 "Hook run in Agent summary minor modes."
80 (defcustom gnus-agent-confirmation-function 'y-or-n-p
81 "Function to confirm when error happens."
85 ;;; Internal variables
87 (defvar gnus-agent-history-buffers nil)
88 (defvar gnus-agent-buffer-alist nil)
89 (defvar gnus-agent-article-alist nil)
90 (defvar gnus-agent-group-alist nil)
91 (defvar gnus-agent-covered-methods nil)
92 (defvar gnus-category-alist nil)
93 (defvar gnus-agent-current-history nil)
94 (defvar gnus-agent-overview-buffer nil)
95 (defvar gnus-category-predicate-cache nil)
96 (defvar gnus-category-group-cache nil)
97 (defvar gnus-agent-spam-hashtb nil)
98 (defvar gnus-agent-file-name nil)
99 (defvar gnus-agent-send-mail-function nil)
100 (defvar gnus-agent-file-coding-system 'raw-text)
102 (defconst gnus-agent-scoreable-headers
103 '("subject" "from" "date" "message-id" "references" "chars" "lines" "xref")
104 "Headers that are considered when scoring articles for download via the Agent.")
107 (defvar gnus-headers)
114 (defun gnus-open-agent ()
116 (gnus-agent-read-servers)
118 (gnus-agent-create-buffer)
119 (add-hook 'gnus-group-mode-hook 'gnus-agent-mode)
120 (add-hook 'gnus-summary-mode-hook 'gnus-agent-mode)
121 (add-hook 'gnus-server-mode-hook 'gnus-agent-mode))
123 (defun gnus-agent-create-buffer ()
124 (if (gnus-buffer-live-p gnus-agent-overview-buffer)
126 (setq gnus-agent-overview-buffer
127 (gnus-get-buffer-create " *Gnus agent overview*"))
128 (with-current-buffer gnus-agent-overview-buffer
129 (mm-enable-multibyte))
132 (gnus-add-shutdown 'gnus-close-agent 'gnus)
134 (defun gnus-close-agent ()
135 (setq gnus-agent-covered-methods nil
136 gnus-category-predicate-cache nil
137 gnus-category-group-cache nil
138 gnus-agent-spam-hashtb nil)
139 (gnus-kill-buffer gnus-agent-overview-buffer))
142 ;;; Utility functions
145 (defun gnus-agent-read-file (file)
146 "Load FILE and do a `read' there."
149 (nnheader-insert-file-contents file)
150 (goto-char (point-min))
151 (read (current-buffer)))))
153 (defsubst gnus-agent-method ()
154 (concat (symbol-name (car gnus-command-method)) "/"
155 (if (equal (cadr gnus-command-method) "")
157 (cadr gnus-command-method))))
159 (defsubst gnus-agent-directory ()
160 "Path of the Gnus agent directory."
161 (nnheader-concat gnus-agent-directory
162 (nnheader-translate-file-chars (gnus-agent-method)) "/"))
164 (defun gnus-agent-lib-file (file)
165 "The full path of the Gnus agent library FILE."
166 (concat (gnus-agent-directory) "agent.lib/" file))
168 ;;; Fetching setup functions.
170 (defun gnus-agent-start-fetch ()
171 "Initialize data structures for efficient fetching."
172 (gnus-agent-open-history)
173 (setq gnus-agent-current-history (gnus-agent-history-buffer))
174 (gnus-agent-create-buffer))
176 (defun gnus-agent-stop-fetch ()
177 "Save all data structures and clean up."
178 (gnus-agent-save-history)
179 (gnus-agent-close-history)
180 (setq gnus-agent-spam-hashtb nil)
182 (set-buffer nntp-server-buffer)
185 (defmacro gnus-agent-with-fetch (&rest forms)
189 (gnus-agent-start-fetch)
191 (gnus-agent-stop-fetch)))
193 (put 'gnus-agent-with-fetch 'lisp-indent-function 0)
194 (put 'gnus-agent-with-fetch 'edebug-form-spec '(body))
200 (defvar gnus-agent-mode-hook nil
201 "Hook run when installing agent mode.")
203 (defvar gnus-agent-mode nil)
204 (defvar gnus-agent-mode-status '(gnus-agent-mode " Plugged"))
206 (defun gnus-agent-mode ()
207 "Minor mode for providing a agent support in Gnus buffers."
208 (let* ((buffer (progn (string-match "^gnus-\\(.*\\)-mode$"
209 (symbol-name major-mode))
210 (match-string 1 (symbol-name major-mode))))
211 (mode (intern (format "gnus-agent-%s-mode" buffer))))
212 (set (make-local-variable 'gnus-agent-mode) t)
214 (set (make-local-variable mode) t)
216 (when (gnus-visual-p 'agent-menu 'menu)
217 (funcall (intern (format "gnus-agent-%s-make-menu-bar" buffer))))
218 (unless (assq 'gnus-agent-mode minor-mode-alist)
219 (push gnus-agent-mode-status minor-mode-alist))
220 (unless (assq mode minor-mode-map-alist)
221 (push (cons mode (symbol-value (intern (format "gnus-agent-%s-mode-map"
223 minor-mode-map-alist))
224 (when (eq major-mode 'gnus-group-mode)
225 (gnus-agent-toggle-plugged gnus-plugged))
226 (gnus-run-hooks 'gnus-agent-mode-hook
227 (intern (format "gnus-agent-%s-mode-hook" buffer)))))
229 (defvar gnus-agent-group-mode-map (make-sparse-keymap))
230 (gnus-define-keys gnus-agent-group-mode-map
231 "Ju" gnus-agent-fetch-groups
232 "Jc" gnus-enter-category-buffer
233 "Jj" gnus-agent-toggle-plugged
234 "Js" gnus-agent-fetch-session
235 "JY" gnus-agent-synchronize
236 "JS" gnus-group-send-drafts
237 "Ja" gnus-agent-add-group
238 "Jr" gnus-agent-remove-group)
240 (defun gnus-agent-group-make-menu-bar ()
241 (unless (boundp 'gnus-agent-group-menu)
243 gnus-agent-group-menu gnus-agent-group-mode-map ""
245 ["Toggle plugged" gnus-agent-toggle-plugged t]
246 ["List categories" gnus-enter-category-buffer t]
247 ["Send drafts" gnus-group-send-drafts gnus-plugged]
249 ["All" gnus-agent-fetch-session gnus-plugged]
250 ["Group" gnus-agent-fetch-group gnus-plugged])))))
252 (defvar gnus-agent-summary-mode-map (make-sparse-keymap))
253 (gnus-define-keys gnus-agent-summary-mode-map
254 "Jj" gnus-agent-toggle-plugged
255 "J#" gnus-agent-mark-article
256 "J\M-#" gnus-agent-unmark-article
257 "@" gnus-agent-toggle-mark
258 "Jc" gnus-agent-catchup)
260 (defun gnus-agent-summary-make-menu-bar ()
261 (unless (boundp 'gnus-agent-summary-menu)
263 gnus-agent-summary-menu gnus-agent-summary-mode-map ""
265 ["Toggle plugged" gnus-agent-toggle-plugged t]
266 ["Mark as downloadable" gnus-agent-mark-article t]
267 ["Unmark as downloadable" gnus-agent-unmark-article t]
268 ["Toggle mark" gnus-agent-toggle-mark t]
269 ["Catchup undownloaded" gnus-agent-catchup t]))))
271 (defvar gnus-agent-server-mode-map (make-sparse-keymap))
272 (gnus-define-keys gnus-agent-server-mode-map
273 "Jj" gnus-agent-toggle-plugged
274 "Ja" gnus-agent-add-server
275 "Jr" gnus-agent-remove-server)
277 (defun gnus-agent-server-make-menu-bar ()
278 (unless (boundp 'gnus-agent-server-menu)
280 gnus-agent-server-menu gnus-agent-server-mode-map ""
282 ["Toggle plugged" gnus-agent-toggle-plugged t]
283 ["Add" gnus-agent-add-server t]
284 ["Remove" gnus-agent-remove-server t]))))
286 (defun gnus-agent-toggle-plugged (plugged)
287 "Toggle whether Gnus is unplugged or not."
288 (interactive (list (not gnus-plugged)))
291 (setq gnus-plugged plugged)
292 (gnus-run-hooks 'gnus-agent-plugged-hook)
293 (setcar (cdr gnus-agent-mode-status) " Plugged"))
294 (gnus-agent-close-connections)
295 (setq gnus-plugged plugged)
296 (gnus-run-hooks 'gnus-agent-unplugged-hook)
297 (setcar (cdr gnus-agent-mode-status) " Unplugged"))
298 (set-buffer-modified-p t))
300 (defun gnus-agent-close-connections ()
301 "Close all methods covered by the Gnus agent."
302 (let ((methods gnus-agent-covered-methods))
304 (gnus-close-server (pop methods)))))
307 (defun gnus-unplugged ()
308 "Start Gnus unplugged."
310 (setq gnus-plugged nil)
314 (defun gnus-plugged ()
315 "Start Gnus plugged."
317 (setq gnus-plugged t)
321 (defun gnus-agentize ()
322 "Allow Gnus to be an offline newsreader.
323 The normal usage of this command is to put the following as the
324 last form in your `.gnus.el' file:
328 This will modify the `gnus-before-startup-hook', `gnus-post-method',
329 and `message-send-mail-function' variables, and install the Gnus
330 agent minor mode in all Gnus buffers."
333 (add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
334 (unless gnus-agent-send-mail-function
335 (setq gnus-agent-send-mail-function message-send-mail-function
336 message-send-mail-function 'gnus-agent-send-mail))
337 (unless gnus-agent-covered-methods
338 (setq gnus-agent-covered-methods (list gnus-select-method))))
340 (defun gnus-agent-queue-setup ()
341 "Make sure the queue group exists."
342 (unless (gnus-gethash "nndraft:queue" gnus-newsrc-hashtb)
343 (gnus-request-create-group "queue" '(nndraft ""))
344 (let ((gnus-level-default-subscribed 1))
345 (gnus-subscribe-group "nndraft:queue" nil '(nndraft "")))
346 (gnus-group-set-parameter
347 "nndraft:queue" 'gnus-dummy '((gnus-draft-mode)))))
349 (defun gnus-agent-send-mail ()
351 (funcall gnus-agent-send-mail-function)
352 (goto-char (point-min))
354 (concat "^" (regexp-quote mail-header-separator) "\n"))
356 (gnus-agent-insert-meta-information 'mail)
357 (gnus-request-accept-article "nndraft:queue" nil t t)))
359 (defun gnus-agent-insert-meta-information (type &optional method)
360 "Insert meta-information into the message that says how it's to be posted.
361 TYPE can be either `mail' or `news'. If the latter METHOD can
364 (message-remove-header gnus-agent-meta-information-header)
365 (goto-char (point-min))
366 (insert gnus-agent-meta-information-header ": "
367 (symbol-name type) " " (format "%S" method)
370 (while (search-backward "\n" nil t)
371 (replace-match "\\n" t t))))
374 ;;; Group mode commands
377 (defun gnus-agent-fetch-groups (n)
378 "Put all new articles in the current groups into the Agent."
381 (error "Groups can't be fetched when Gnus is unplugged"))
382 (gnus-group-iterate n 'gnus-agent-fetch-group))
384 (defun gnus-agent-fetch-group (group)
385 "Put all new articles in GROUP into the Agent."
386 (interactive (list (gnus-group-group-name)))
388 (error "Groups can't be fetched when Gnus is unplugged"))
390 (error "No group on the current line"))
391 (let ((gnus-command-method (gnus-find-method-for-group group)))
392 (gnus-agent-with-fetch
393 (gnus-agent-fetch-group-1 group gnus-command-method)
394 (gnus-message 5 "Fetching %s...done" group))))
396 (defun gnus-agent-add-group (category arg)
397 "Add the current group to an agent category."
403 (mapcar (lambda (cat) (list (symbol-name (car cat))))
407 (let ((cat (assq category gnus-category-alist))
409 (gnus-group-iterate arg
411 (when (cadddr (setq c (gnus-group-category group)))
412 (setf (cadddr c) (delete group (cadddr c))))
413 (push group groups)))
414 (setf (cadddr cat) (nconc (cadddr cat) groups))
415 (gnus-category-write)))
417 (defun gnus-agent-remove-group (arg)
418 "Remove the current group from its agent category, if any."
421 (gnus-group-iterate arg
423 (when (cadddr (setq c (gnus-group-category group)))
424 (setf (cadddr c) (delete group (cadddr c))))))
425 (gnus-category-write)))
427 (defun gnus-agent-synchronize ()
428 "Synchronize local, unplugged, data with backend.
429 Currently sends flag setting requests, if any."
432 (dolist (gnus-command-method gnus-agent-covered-methods)
433 (when (file-exists-p (gnus-agent-lib-file "flags"))
434 (set-buffer (get-buffer-create " *Gnus Agent flag synchronize*"))
436 (nnheader-insert-file-contents (gnus-agent-lib-file "flags"))
437 (if (null (gnus-check-server gnus-command-method))
438 (message "Couldn't open server %s" (nth 1 gnus-command-method))
440 (if (null (eval (read (current-buffer))))
441 (progn (forward-line)
443 (write-file (gnus-agent-lib-file "flags"))
444 (error "Couldn't set flags from file %s"
445 (gnus-agent-lib-file "flags"))))
446 (write-file (gnus-agent-lib-file "flags")))
447 (kill-buffer nil)))))
450 ;;; Server mode commands
453 (defun gnus-agent-add-server (server)
454 "Enroll SERVER in the agent program."
455 (interactive (list (gnus-server-server-name)))
457 (error "No server on the current line"))
458 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
459 (when (member method gnus-agent-covered-methods)
460 (error "Server already in the agent program"))
461 (push method gnus-agent-covered-methods)
462 (gnus-agent-write-servers)
463 (message "Entered %s into the Agent" server)))
465 (defun gnus-agent-remove-server (server)
466 "Remove SERVER from the agent program."
467 (interactive (list (gnus-server-server-name)))
469 (error "No server on the current line"))
470 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
471 (unless (member method gnus-agent-covered-methods)
472 (error "Server not in the agent program"))
473 (setq gnus-agent-covered-methods
474 (delete method gnus-agent-covered-methods))
475 (gnus-agent-write-servers)
476 (message "Removed %s from the agent" server)))
478 (defun gnus-agent-read-servers ()
479 "Read the alist of covered servers."
480 (setq gnus-agent-covered-methods
481 (gnus-agent-read-file
482 (nnheader-concat gnus-agent-directory "lib/servers"))))
484 (defun gnus-agent-write-servers ()
485 "Write the alist of covered servers."
486 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
487 (let ((coding-system-for-write nnheader-file-coding-system)
488 (file-name-coding-system nnmail-pathname-coding-system))
489 (with-temp-file (nnheader-concat gnus-agent-directory "lib/servers")
490 (prin1 gnus-agent-covered-methods (current-buffer)))))
496 (defun gnus-agent-mark-article (n &optional unmark)
497 "Mark the next N articles as downloadable.
498 If N is negative, mark backward instead. If UNMARK is non-nil, remove
499 the mark instead. The difference between N and the actual number of
500 articles marked is returned."
502 (let ((backward (< n 0))
507 (gnus-summary-set-agent-mark
508 (gnus-summary-article-number) unmark)
509 (zerop (gnus-summary-next-subject (if backward -1 1) nil t))))
512 (gnus-message 7 "No more articles"))
513 (gnus-summary-recenter)
514 (gnus-summary-position-point)
517 (defun gnus-agent-unmark-article (n)
518 "Remove the downloadable mark from the next N articles.
519 If N is negative, unmark backward instead. The difference between N and
520 the actual number of articles unmarked is returned."
522 (gnus-agent-mark-article n t))
524 (defun gnus-agent-toggle-mark (n)
525 "Toggle the downloadable mark from the next N articles.
526 If N is negative, toggle backward instead. The difference between N and
527 the actual number of articles toggled is returned."
529 (gnus-agent-mark-article n 'toggle))
531 (defun gnus-summary-set-agent-mark (article &optional unmark)
532 "Mark ARTICLE as downloadable."
533 (let ((unmark (if (and (not (null unmark)) (not (eq t unmark)))
534 (memq article gnus-newsgroup-downloadable)
538 (setq gnus-newsgroup-downloadable
539 (delq article gnus-newsgroup-downloadable))
540 (push article gnus-newsgroup-undownloaded))
541 (setq gnus-newsgroup-undownloaded
542 (delq article gnus-newsgroup-undownloaded))
543 (push article gnus-newsgroup-downloadable))
544 (gnus-summary-update-mark
545 (if unmark gnus-undownloaded-mark gnus-downloadable-mark)
548 (defun gnus-agent-get-undownloaded-list ()
549 "Mark all unfetched articles as read."
550 (let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
551 (when (and (not gnus-plugged)
552 (gnus-agent-method-p gnus-command-method))
553 (gnus-agent-load-alist gnus-newsgroup-name)
554 ;; First mark all undownloaded articles as undownloaded.
555 (let ((articles (append gnus-newsgroup-unreads
556 gnus-newsgroup-marked
557 gnus-newsgroup-dormant))
559 (while (setq article (pop articles))
560 (unless (or (cdr (assq article gnus-agent-article-alist))
561 (memq article gnus-newsgroup-downloadable)
562 (memq article gnus-newsgroup-cached))
563 (push article gnus-newsgroup-undownloaded))))
564 ;; Then mark downloaded downloadable as not-downloadable,
565 ;; if you get my drift.
566 (let ((articles gnus-newsgroup-downloadable)
568 (while (setq article (pop articles))
569 (when (cdr (assq article gnus-agent-article-alist))
570 (setq gnus-newsgroup-downloadable
571 (delq article gnus-newsgroup-downloadable))))))))
573 (defun gnus-agent-catchup ()
574 "Mark all undownloaded articles as read."
577 (while gnus-newsgroup-undownloaded
578 (gnus-summary-mark-article
579 (pop gnus-newsgroup-undownloaded) gnus-catchup-mark)))
580 (gnus-summary-position-point))
583 ;;; Internal functions
586 (defun gnus-agent-save-active (method)
587 (gnus-agent-save-active-1 method 'gnus-active-to-gnus-format))
589 (defun gnus-agent-save-active-1 (method function)
590 (when (gnus-agent-method-p method)
591 (let* ((gnus-command-method method)
592 (new (gnus-make-hashtable (count-lines (point-min) (point-max))))
593 (file (gnus-agent-lib-file "active")))
594 (funcall function nil new)
595 (gnus-agent-write-active file new)
597 (nnheader-insert-file-contents file))))
599 (defun gnus-agent-write-active (file new)
600 (let ((orig (gnus-make-hashtable (count-lines (point-min) (point-max))))
601 (file (gnus-agent-lib-file "active"))
603 (when (file-exists-p file)
605 (nnheader-insert-file-contents file)
606 (gnus-active-to-gnus-format nil orig))
609 (when (and sym (boundp sym))
610 (if (and (boundp (setq osym (intern (symbol-name sym) orig)))
611 (setq elem (symbol-value osym)))
612 (setcdr elem (cdr (symbol-value sym)))
613 (set (intern (symbol-name sym) orig) (symbol-value sym)))))
615 (gnus-make-directory (file-name-directory file))
616 (let ((coding-system-for-write gnus-agent-file-coding-system))
617 ;; The hashtable contains real names of groups, no more prefix
618 ;; removing, so set `full' to `t'.
619 (gnus-write-active-file file orig t))))
621 (defun gnus-agent-save-groups (method)
622 (gnus-agent-save-active-1 method 'gnus-groups-to-gnus-format))
624 (defun gnus-agent-save-group-info (method group active)
625 (when (gnus-agent-method-p method)
626 (let* ((gnus-command-method method)
627 (coding-system-for-write nnheader-file-coding-system)
628 (file-name-coding-system nnmail-pathname-coding-system)
629 (file (gnus-agent-lib-file "active"))
631 (gnus-make-directory (file-name-directory file))
633 ;; Emacs got problem to match non-ASCII group in multibyte buffer.
634 (mm-disable-multibyte)
635 (when (file-exists-p file)
636 (nnheader-insert-file-contents file))
637 (goto-char (point-min))
638 (when (re-search-forward
639 (concat "^" (regexp-quote group) " ") nil t)
642 (narrow-to-region (match-beginning 0)
646 (setq oactive (car (nnmail-parse-active)))))
648 (insert (format "%S %d %d y\n" (intern group)
650 (or (car oactive) (car active))))
651 (goto-char (point-max))
652 (while (search-backward "\\." nil t)
655 (defun gnus-agent-group-path (group)
656 "Translate GROUP into a path."
657 (if nnmail-use-long-file-names
658 (gnus-group-real-name group)
659 (nnheader-translate-file-chars
660 (nnheader-replace-chars-in-string
661 (nnheader-replace-duplicate-chars-in-string
662 (nnheader-replace-chars-in-string
663 (gnus-group-real-name group)
670 (defun gnus-agent-method-p (method)
671 "Say whether METHOD is covered by the agent."
672 (member method gnus-agent-covered-methods))
674 (defun gnus-agent-get-function (method)
675 (if (and (not gnus-plugged)
676 (gnus-agent-method-p method))
682 ;;; History functions
684 (defun gnus-agent-history-buffer ()
685 (cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))
687 (defun gnus-agent-open-history ()
689 (push (cons (gnus-agent-method)
690 (set-buffer (gnus-get-buffer-create
691 (format " *Gnus agent %s history*"
692 (gnus-agent-method)))))
693 gnus-agent-history-buffers)
694 (mm-disable-multibyte) ;; everything is binary
697 (let ((file (gnus-agent-lib-file "history")))
698 (when (file-exists-p file)
699 (nnheader-insert-file-contents file))
700 (set (make-local-variable 'gnus-agent-file-name) file))))
702 (defun gnus-agent-save-history ()
704 (set-buffer gnus-agent-current-history)
705 (gnus-make-directory (file-name-directory gnus-agent-file-name))
706 (let ((coding-system-for-write gnus-agent-file-coding-system))
707 (write-region (1+ (point-min)) (point-max)
708 gnus-agent-file-name nil 'silent))))
710 (defun gnus-agent-close-history ()
711 (when (gnus-buffer-live-p gnus-agent-current-history)
712 (kill-buffer gnus-agent-current-history)
713 (setq gnus-agent-history-buffers
714 (delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
715 gnus-agent-history-buffers))))
717 (defun gnus-agent-enter-history (id group-arts date)
719 (set-buffer gnus-agent-current-history)
720 (goto-char (point-max))
722 (insert id "\t" (number-to-string date) "\t")
724 (insert (format "%S" (intern (caar group-arts)))
725 " " (number-to-string (cdr (pop group-arts)))
728 (while (search-backward "\\." p t)
731 (defun gnus-agent-article-in-history-p (id)
733 (set-buffer (gnus-agent-history-buffer))
734 (goto-char (point-min))
735 (search-forward (concat "\n" id "\t") nil t)))
737 (defun gnus-agent-history-path (id)
739 (set-buffer (gnus-agent-history-buffer))
740 (goto-char (point-min))
741 (when (search-forward (concat "\n" id "\t") nil t)
742 (let ((method (gnus-agent-method)))
744 (while (not (numberp (setq group (read (current-buffer)))))
745 (push (concat method "/" group) paths))
746 (nreverse paths))))))
752 (defun gnus-agent-fetch-articles (group articles)
753 "Fetch ARTICLES from GROUP and put them into the Agent."
755 ;; Prune off articles that we have already fetched.
757 (cdr (assq (car articles) gnus-agent-article-alist)))
759 (let ((arts articles))
761 (if (cdr (assq (cadr arts) gnus-agent-article-alist))
762 (setcdr arts (cddr arts))
763 (setq arts (cdr arts)))))
766 (gnus-agent-directory)
767 (gnus-agent-group-path group) "/"))
768 (date (time-to-days (current-time)))
771 (gnus-make-directory dir)
772 (gnus-message 7 "Fetching articles for %s..." group)
773 ;; Fetch the articles from the backend.
774 (if (gnus-check-backend-function 'retrieve-articles group)
775 (setq pos (gnus-retrieve-articles articles group))
778 (while (setq article (pop articles))
780 (gnus-backlog-request-article group article
782 (gnus-request-article article group))
783 (goto-char (point-max))
784 (push (cons article (point)) pos)
785 (insert-buffer-substring nntp-server-buffer)))
786 (copy-to-buffer nntp-server-buffer (point-min) (point-max))
787 (setq pos (nreverse pos)))))
788 ;; Then save these articles into the Agent.
790 (set-buffer nntp-server-buffer)
792 (narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
793 (goto-char (point-min))
794 (when (search-forward "\n\n" nil t)
795 (when (search-backward "\nXrefs: " nil t)
796 ;; Handle crossposting.
797 (skip-chars-forward "^ ")
798 (skip-chars-forward " ")
800 (while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) +")
801 (push (cons (buffer-substring (match-beginning 1)
803 (buffer-substring (match-beginning 2)
806 (goto-char (match-end 0)))
807 (gnus-agent-crosspost crosses (caar pos))))
808 (goto-char (point-min))
809 (if (not (re-search-forward "^Message-ID: *<\\([^>\n]+\\)>" nil t))
810 (setq id "No-Message-ID-in-article")
811 (setq id (buffer-substring (match-beginning 1) (match-end 1))))
812 (let ((coding-system-for-write
813 gnus-agent-file-coding-system))
814 (write-region (point-min) (point-max)
815 (concat dir (number-to-string (caar pos)))
817 (when (setq elem (assq (caar pos) gnus-agent-article-alist))
819 (gnus-agent-enter-history
820 id (or crosses (list (cons group (caar pos)))) date)
823 (gnus-agent-save-alist group)))))
825 (defun gnus-agent-crosspost (crosses article)
826 (let (gnus-agent-article-alist group alist beg end)
828 (set-buffer gnus-agent-overview-buffer)
829 (when (nnheader-find-nov-line article)
832 (setq end (progn (forward-line 1) (point)))))
834 (setq group (caar crosses))
835 (unless (setq alist (assoc group gnus-agent-group-alist))
836 (push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
837 gnus-agent-group-alist))
838 (setcdr alist (cons (cons (cdar crosses) t) (cdr alist)))
840 (set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
842 (when (= (point-max) (point-min))
843 (push (cons group (current-buffer)) gnus-agent-buffer-alist)
845 (nnheader-insert-file-contents
846 (gnus-agent-article-name ".overview" group))))
847 (nnheader-find-nov-line (string-to-number (cdar crosses)))
848 (insert (string-to-number (cdar crosses)))
849 (insert-buffer-substring gnus-agent-overview-buffer beg end))
852 (defun gnus-agent-flush-cache ()
854 (while gnus-agent-buffer-alist
855 (set-buffer (cdar gnus-agent-buffer-alist))
856 (let ((coding-system-for-write
857 gnus-agent-file-coding-system))
858 (write-region (point-min) (point-max)
859 (gnus-agent-article-name ".overview"
860 (caar gnus-agent-buffer-alist))
862 (pop gnus-agent-buffer-alist))
863 (while gnus-agent-group-alist
864 (with-temp-file (caar gnus-agent-group-alist)
865 (princ (cdar gnus-agent-group-alist))
867 (pop gnus-agent-group-alist))))
869 (defun gnus-agent-fetch-headers (group &optional force)
870 (let ((articles (gnus-list-of-unread-articles group))
871 (gnus-decode-encoded-word-function 'identity)
872 (file (gnus-agent-article-name ".overview" group)))
873 ;; Add article with marks to list of article headers we want to fetch.
874 (dolist (arts (gnus-info-marks (gnus-get-info group)))
875 (setq articles (union (gnus-uncompress-sequence (cdr arts))
877 (setq articles (sort articles '<))
878 ;; Remove known articles.
879 (when (gnus-agent-load-alist group)
880 (setq articles (gnus-sorted-intersection
882 (gnus-uncompress-range
883 (cons (1+ (caar (last gnus-agent-article-alist)))
884 (cdr (gnus-active group)))))))
886 (gnus-make-directory (nnheader-translate-file-chars
887 (file-name-directory file) t))
889 (gnus-message 7 "Fetching headers for %s..." group)
891 (set-buffer nntp-server-buffer)
892 (unless (eq 'nov (gnus-retrieve-headers articles group))
893 (nnvirtual-convert-headers))
894 ;; Save these headers for later processing.
895 (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
896 (when (file-exists-p file)
897 (gnus-agent-braid-nov group articles file))
898 (let ((coding-system-for-write
899 gnus-agent-file-coding-system))
900 (write-region (point-min) (point-max) file nil 'silent))
901 (gnus-agent-save-alist group articles nil)
902 (gnus-agent-enter-history
903 "last-header-fetched-for-session"
904 (list (cons group (nth (- (length articles) 1) articles)))
905 (time-to-days (current-time)))
908 (defsubst gnus-agent-copy-nov-line (article)
910 (set-buffer gnus-agent-overview-buffer)
912 (if (eq article (read (current-buffer)))
913 (setq e (progn (forward-line 1) (point)))
917 (set-buffer nntp-server-buffer)
918 (insert-buffer-substring gnus-agent-overview-buffer b e)))
920 (defun gnus-agent-braid-nov (group articles file)
921 (set-buffer gnus-agent-overview-buffer)
922 (goto-char (point-min))
923 (set-buffer nntp-server-buffer)
925 (nnheader-insert-file-contents file)
926 (goto-char (point-max))
927 (if (or (= (point-min) (point-max))
930 (< (read (current-buffer)) (car articles))))
931 ;; We have only headers that are after the older headers,
932 ;; so we just append them.
934 (goto-char (point-max))
935 (insert-buffer-substring gnus-agent-overview-buffer))
936 ;; We do it the hard way.
937 (nnheader-find-nov-line (car articles))
938 (gnus-agent-copy-nov-line (car articles))
942 (while (and (not (eobp))
943 (< (read (current-buffer)) (car articles)))
947 (gnus-agent-copy-nov-line (car articles))
948 (setq articles (cdr articles))))
951 (set-buffer gnus-agent-overview-buffer)
954 (set-buffer nntp-server-buffer)
955 (insert-buffer-substring gnus-agent-overview-buffer b e)))))
957 (defun gnus-agent-load-alist (group &optional dir)
958 "Load the article-state alist for GROUP."
959 (setq gnus-agent-article-alist
960 (gnus-agent-read-file
962 (concat dir ".agentview")
963 (gnus-agent-article-name ".agentview" group)))))
965 (defun gnus-agent-save-alist (group &optional articles state dir)
966 "Save the article-state alist for GROUP."
967 (let ((file-name-coding-system nnmail-pathname-coding-system))
968 (with-temp-file (if dir
969 (concat dir ".agentview")
970 (gnus-agent-article-name ".agentview" group))
971 (princ (setq gnus-agent-article-alist
972 (nconc gnus-agent-article-alist
973 (mapcar (lambda (article) (cons article state))
978 (defun gnus-agent-article-name (article group)
979 (concat (gnus-agent-directory) (gnus-agent-group-path group) "/"
980 (if (stringp article) article (string-to-number article))))
982 (defun gnus-agent-batch-confirmation (msg)
983 "Show error message and return t."
988 (defun gnus-agent-batch-fetch ()
989 "Start Gnus and fetch session."
992 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
993 (gnus-agent-fetch-session))
996 (defun gnus-agent-fetch-session ()
997 "Fetch all articles and headers that are eligible for fetching."
999 (unless gnus-agent-covered-methods
1000 (error "No servers are covered by the Gnus agent"))
1001 (unless gnus-plugged
1002 (error "Can't fetch articles while Gnus is unplugged"))
1003 (let ((methods gnus-agent-covered-methods)
1004 groups group gnus-command-method)
1009 (setq gnus-command-method (car methods))
1010 (when (or (gnus-server-opened gnus-command-method)
1011 (gnus-open-server gnus-command-method))
1012 (setq groups (gnus-groups-from-server (car methods)))
1013 (gnus-agent-with-fetch
1014 (while (setq group (pop groups))
1015 (when (<= (gnus-group-level group) gnus-agent-handle-level)
1016 (gnus-agent-fetch-group-1 group gnus-command-method))))))
1018 (unless (funcall gnus-agent-confirmation-function
1019 (format "Error (%s). Continue? " err))
1020 (error "Cannot fetch articles into the Gnus agent."))))
1022 (gnus-message 6 "Finished fetching articles into the Gnus agent"))))
1024 (defun gnus-agent-fetch-group-1 (group method)
1026 (let ((gnus-command-method method)
1027 (gnus-newsgroup-name group)
1028 gnus-newsgroup-dependencies gnus-newsgroup-headers
1029 gnus-newsgroup-scored gnus-headers gnus-score
1030 gnus-use-cache articles arts
1031 category predicate info marks score-param)
1032 (unless (gnus-check-group group)
1033 (error "Can't open server for %s" group))
1035 (when (and (or (gnus-active group) (gnus-activate-group group))
1036 (setq articles (gnus-agent-fetch-headers group))
1038 ;; Parse them and see which articles we want to fetch.
1039 (setq gnus-newsgroup-dependencies
1040 (make-vector (length articles) 0))
1041 ;; No need to call `gnus-get-newsgroup-headers-xover' with
1042 ;; the entire .overview for group as we still have the just
1043 ;; downloaded headers in `gnus-agent-overview-buffer'.
1044 (let ((nntp-server-buffer gnus-agent-overview-buffer))
1045 (setq gnus-newsgroup-headers
1046 (gnus-get-newsgroup-headers-xover articles nil nil
1048 ;; `gnus-agent-overview-buffer' may be killed for
1049 ;; timeout reason. If so, recreate it.
1050 (gnus-agent-create-buffer)))
1051 (setq category (gnus-group-category group))
1054 (or (gnus-group-find-parameter group 'agent-predicate t)
1056 ;; Do we want to download everything, or nothing?
1057 (if (or (eq (caaddr predicate) 'gnus-agent-true)
1058 (eq (caaddr predicate) 'gnus-agent-false))
1060 (setq arts (symbol-value
1061 (cadr (assoc (caaddr predicate)
1062 '((gnus-agent-true articles)
1063 (gnus-agent-false nil))))))
1064 ;; No, we need to decide what we want.
1068 (gnus-group-find-parameter group 'agent-score t)
1071 (require 'gnus-score)
1072 (if (eq score-method 'file)
1074 (gnus-score-load-files
1075 (gnus-all-score-files group)))
1077 (while (setq list (car entries))
1078 (push (car list) score-file)
1079 (setq list (cdr list))
1081 (when (member (caar list)
1082 gnus-agent-scoreable-headers)
1083 (push (car list) score-file))
1084 (setq list (cdr list)))
1086 (append score-param (list (nreverse score-file)))
1087 score-file nil entries (cdr entries)))
1089 (if (stringp (car score-method))
1091 (list (list score-method)))))))
1093 (gnus-score-headers score-param))
1095 (while (setq gnus-headers (pop gnus-newsgroup-headers))
1097 (or (cdr (assq (mail-header-number gnus-headers)
1098 gnus-newsgroup-scored))
1099 gnus-summary-default-score))
1100 (when (funcall predicate)
1101 (push (mail-header-number gnus-headers)
1103 ;; Fetch the articles.
1105 (gnus-agent-fetch-articles group arts)))
1106 ;; Perhaps we have some additional articles to fetch.
1107 (setq arts (assq 'download (gnus-info-marks
1108 (setq info (gnus-get-info group)))))
1110 (gnus-agent-fetch-articles
1111 group (gnus-uncompress-range (cdr arts)))
1112 (setq marks (delq arts (gnus-info-marks info)))
1113 (gnus-info-set-marks info marks)
1115 (concat "(gnus-group-set-info '"
1116 (gnus-prin1-to-string info)
1120 ;;; Agent Category Mode
1123 (defvar gnus-category-mode-hook nil
1124 "Hook run in `gnus-category-mode' buffers.")
1126 (defvar gnus-category-line-format " %(%20c%): %g\n"
1127 "Format of category lines.")
1129 (defvar gnus-category-mode-line-format "Gnus: %%b"
1130 "The format specification for the category mode line.")
1132 (defvar gnus-agent-short-article 100
1133 "Articles that have fewer lines than this are short.")
1135 (defvar gnus-agent-long-article 200
1136 "Articles that have more lines than this are long.")
1138 (defvar gnus-agent-low-score 0
1139 "Articles that have a score lower than this have a low score.")
1141 (defvar gnus-agent-high-score 0
1142 "Articles that have a score higher than this have a high score.")
1145 ;;; Internal variables.
1147 (defvar gnus-category-buffer "*Agent Category*")
1149 (defvar gnus-category-line-format-alist
1150 `((?c gnus-tmp-name ?s)
1151 (?g gnus-tmp-groups ?d)))
1153 (defvar gnus-category-mode-line-format-alist
1154 `((?u user-defined ?s)))
1156 (defvar gnus-category-line-format-spec nil)
1157 (defvar gnus-category-mode-line-format-spec nil)
1159 (defvar gnus-category-mode-map nil)
1160 (put 'gnus-category-mode 'mode-class 'special)
1162 (unless gnus-category-mode-map
1163 (setq gnus-category-mode-map (make-sparse-keymap))
1164 (suppress-keymap gnus-category-mode-map)
1166 (gnus-define-keys gnus-category-mode-map
1167 "q" gnus-category-exit
1168 "k" gnus-category-kill
1169 "c" gnus-category-copy
1170 "a" gnus-category-add
1171 "p" gnus-category-edit-predicate
1172 "g" gnus-category-edit-groups
1173 "s" gnus-category-edit-score
1174 "l" gnus-category-list
1176 "\C-c\C-i" gnus-info-find-node
1177 "\C-c\C-b" gnus-bug))
1179 (defvar gnus-category-menu-hook nil
1180 "*Hook run after the creation of the menu.")
1182 (defun gnus-category-make-menu-bar ()
1183 (gnus-turn-off-edit-menu 'category)
1184 (unless (boundp 'gnus-category-menu)
1186 gnus-category-menu gnus-category-mode-map ""
1188 ["Add" gnus-category-add t]
1189 ["Kill" gnus-category-kill t]
1190 ["Copy" gnus-category-copy t]
1191 ["Edit predicate" gnus-category-edit-predicate t]
1192 ["Edit score" gnus-category-edit-score t]
1193 ["Edit groups" gnus-category-edit-groups t]
1194 ["Exit" gnus-category-exit t]))
1196 (gnus-run-hooks 'gnus-category-menu-hook)))
1198 (defun gnus-category-mode ()
1199 "Major mode for listing and editing agent categories.
1201 All normal editing commands are switched off.
1202 \\<gnus-category-mode-map>
1203 For more in-depth information on this mode, read the manual
1204 (`\\[gnus-info-find-node]').
1206 The following commands are available:
1208 \\{gnus-category-mode-map}"
1210 (when (gnus-visual-p 'category-menu 'menu)
1211 (gnus-category-make-menu-bar))
1212 (kill-all-local-variables)
1213 (gnus-simplify-mode-line)
1214 (setq major-mode 'gnus-category-mode)
1215 (setq mode-name "Category")
1216 (gnus-set-default-directory)
1217 (setq mode-line-process nil)
1218 (use-local-map gnus-category-mode-map)
1219 (buffer-disable-undo)
1220 (setq truncate-lines t)
1221 (setq buffer-read-only t)
1222 (gnus-run-hooks 'gnus-category-mode-hook))
1224 (defalias 'gnus-category-position-point 'gnus-goto-colon)
1226 (defun gnus-category-insert-line (category)
1227 (let* ((gnus-tmp-name (car category))
1228 (gnus-tmp-groups (length (cadddr category))))
1230 (gnus-add-text-properties
1234 (eval gnus-category-line-format-spec))
1235 (list 'gnus-category gnus-tmp-name))))
1237 (defun gnus-enter-category-buffer ()
1238 "Go to the Category buffer."
1240 (gnus-category-setup-buffer)
1241 (gnus-configure-windows 'category)
1242 (gnus-category-prepare))
1244 (defun gnus-category-setup-buffer ()
1245 (unless (get-buffer gnus-category-buffer)
1247 (set-buffer (gnus-get-buffer-create gnus-category-buffer))
1248 (gnus-category-mode))))
1250 (defun gnus-category-prepare ()
1251 (gnus-set-format 'category-mode)
1252 (gnus-set-format 'category t)
1253 (let ((alist gnus-category-alist)
1254 (buffer-read-only nil))
1257 (gnus-category-insert-line (pop alist)))
1258 (goto-char (point-min))
1259 (gnus-category-position-point)))
1261 (defun gnus-category-name ()
1262 (or (get-text-property (gnus-point-at-bol) 'gnus-category)
1263 (error "No category on the current line")))
1265 (defun gnus-category-read ()
1266 "Read the category alist."
1267 (setq gnus-category-alist
1268 (or (gnus-agent-read-file
1269 (nnheader-concat gnus-agent-directory "lib/categories"))
1270 (list (list 'default 'short nil nil)))))
1272 (defun gnus-category-write ()
1273 "Write the category alist."
1274 (setq gnus-category-predicate-cache nil
1275 gnus-category-group-cache nil)
1276 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
1277 (with-temp-file (nnheader-concat gnus-agent-directory "lib/categories")
1278 (prin1 gnus-category-alist (current-buffer))))
1280 (defun gnus-category-edit-predicate (category)
1281 "Edit the predicate for CATEGORY."
1282 (interactive (list (gnus-category-name)))
1283 (let ((info (assq category gnus-category-alist)))
1285 (cadr info) (format "Editing the predicate for category %s" category)
1286 `(lambda (predicate)
1287 (setcar (cdr (assq ',category gnus-category-alist)) predicate)
1288 (gnus-category-write)
1289 (gnus-category-list)))))
1291 (defun gnus-category-edit-score (category)
1292 "Edit the score expression for CATEGORY."
1293 (interactive (list (gnus-category-name)))
1294 (let ((info (assq category gnus-category-alist)))
1297 (format "Editing the score expression for category %s" category)
1299 (setcar (cddr (assq ',category gnus-category-alist)) groups)
1300 (gnus-category-write)
1301 (gnus-category-list)))))
1303 (defun gnus-category-edit-groups (category)
1304 "Edit the group list for CATEGORY."
1305 (interactive (list (gnus-category-name)))
1306 (let ((info (assq category gnus-category-alist)))
1308 (cadddr info) (format "Editing the group list for category %s" category)
1310 (setcar (nthcdr 3 (assq ',category gnus-category-alist)) groups)
1311 (gnus-category-write)
1312 (gnus-category-list)))))
1314 (defun gnus-category-kill (category)
1315 "Kill the current category."
1316 (interactive (list (gnus-category-name)))
1317 (let ((info (assq category gnus-category-alist))
1318 (buffer-read-only nil))
1320 (setq gnus-category-alist (delq info gnus-category-alist))
1321 (gnus-category-write)))
1323 (defun gnus-category-copy (category to)
1324 "Copy the current category."
1325 (interactive (list (gnus-category-name) (intern (read-string "New name: "))))
1326 (let ((info (assq category gnus-category-alist)))
1327 (push (list to (gnus-copy-sequence (cadr info))
1328 (gnus-copy-sequence (caddr info)) nil)
1329 gnus-category-alist)
1330 (gnus-category-write)
1331 (gnus-category-list)))
1333 (defun gnus-category-add (category)
1334 "Create a new category."
1335 (interactive "SCategory name: ")
1336 (when (assq category gnus-category-alist)
1337 (error "Category %s already exists" category))
1338 (push (list category 'false nil nil)
1339 gnus-category-alist)
1340 (gnus-category-write)
1341 (gnus-category-list))
1343 (defun gnus-category-list ()
1344 "List all categories."
1346 (gnus-category-prepare))
1348 (defun gnus-category-exit ()
1349 "Return to the group buffer."
1351 (kill-buffer (current-buffer))
1352 (gnus-configure-windows 'group t))
1354 ;; To avoid having 8-bit characters in the source file.
1355 (defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))
1357 (defvar gnus-category-predicate-alist
1358 '((spam . gnus-agent-spam-p)
1359 (short . gnus-agent-short-p)
1360 (long . gnus-agent-long-p)
1361 (low . gnus-agent-low-scored-p)
1362 (high . gnus-agent-high-scored-p)
1363 (true . gnus-agent-true)
1364 (false . gnus-agent-false))
1365 "Mapping from short score predicate symbols to predicate functions.")
1367 (defun gnus-agent-spam-p ()
1368 "Say whether an article is spam or not."
1369 (unless gnus-agent-spam-hashtb
1370 (setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
1371 (if (not (equal (mail-header-references gnus-headers) ""))
1373 (let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
1375 (gnus-gethash string gnus-agent-spam-hashtb)
1376 (gnus-sethash string t gnus-agent-spam-hashtb)))))
1378 (defun gnus-agent-short-p ()
1379 "Say whether an article is short or not."
1380 (< (mail-header-lines gnus-headers) gnus-agent-short-article))
1382 (defun gnus-agent-long-p ()
1383 "Say whether an article is long or not."
1384 (> (mail-header-lines gnus-headers) gnus-agent-long-article))
1386 (defun gnus-agent-low-scored-p ()
1387 "Say whether an article has a low score or not."
1388 (< gnus-score gnus-agent-low-score))
1390 (defun gnus-agent-high-scored-p ()
1391 "Say whether an article has a high score or not."
1392 (> gnus-score gnus-agent-high-score))
1394 (defun gnus-category-make-function (cat)
1395 "Make a function from category CAT."
1396 `(lambda () ,(gnus-category-make-function-1 cat)))
1398 (defun gnus-agent-true ()
1402 (defun gnus-agent-false ()
1406 (defun gnus-category-make-function-1 (cat)
1407 "Make a function from category CAT."
1409 ;; Functions are just returned as is.
1411 (gnus-functionp cat))
1412 `(,(or (cdr (assq cat gnus-category-predicate-alist))
1414 ;; More complex category.
1417 ((memq (car cat) '(& and))
1419 ((memq (car cat) '(| or))
1421 ((memq (car cat) gnus-category-not)
1423 ,@(mapcar 'gnus-category-make-function-1 (cdr cat))))
1425 (error "Unknown category type: %s" cat))))
1427 (defun gnus-get-predicate (predicate)
1428 "Return the predicate for CATEGORY."
1429 (or (cdr (assoc predicate gnus-category-predicate-cache))
1430 (cdar (push (cons predicate
1431 (gnus-category-make-function predicate))
1432 gnus-category-predicate-cache))))
1434 (defun gnus-group-category (group)
1435 "Return the category GROUP belongs to."
1436 (unless gnus-category-group-cache
1437 (setq gnus-category-group-cache (gnus-make-hashtable 1000))
1438 (let ((cs gnus-category-alist)
1440 (while (setq cat (pop cs))
1441 (setq groups (cadddr cat))
1443 (gnus-sethash (pop groups) cat gnus-category-group-cache)))))
1444 (or (gnus-gethash group gnus-category-group-cache)
1445 (assq 'default gnus-category-alist)))
1447 (defun gnus-agent-expire ()
1448 "Expire all old articles."
1450 (let ((methods gnus-agent-covered-methods)
1451 (day (- (time-to-days (current-time)) gnus-agent-expire-days))
1452 gnus-command-method sym group articles
1453 history overview file histories elem art nov-file low info
1454 unreads marked article orig lowest highest)
1456 (setq overview (gnus-get-buffer-create " *expire overview*"))
1457 (while (setq gnus-command-method (pop methods))
1458 (when (file-exists-p (gnus-agent-lib-file "active"))
1460 (nnheader-insert-file-contents (gnus-agent-lib-file "active"))
1461 (gnus-active-to-gnus-format
1463 (setq orig (gnus-make-hashtable
1464 (count-lines (point-min) (point-max))))))
1465 (let ((expiry-hashtb (gnus-make-hashtable 1023)))
1466 (gnus-agent-open-history)
1468 (setq gnus-agent-current-history
1469 (setq history (gnus-agent-history-buffer))))
1470 (goto-char (point-min))
1471 (when (> (buffer-size) 1)
1472 (goto-char (point-min))
1474 (skip-chars-forward "^\t")
1475 (if (> (read (current-buffer)) day)
1476 ;; New article; we don't expire it.
1478 ;; Old article. Schedule it for possible nuking.
1480 (setq sym (let ((obarray expiry-hashtb) s)
1481 (setq s (read (current-buffer)))
1482 (if (stringp s) (intern s) s)))
1484 (set sym (cons (cons (read (current-buffer)) (point))
1485 (symbol-value sym)))
1486 (set sym (list (cons (read (current-buffer)) (point)))))
1487 (skip-chars-forward " "))
1489 ;; We now have all articles that can possibly be expired.
1492 (setq group (symbol-name sym)
1493 articles (sort (symbol-value sym) 'car-less-than-car)
1494 low (car (gnus-active group))
1495 info (gnus-get-info group)
1496 unreads (ignore-errors
1497 (gnus-list-of-unread-articles group))
1499 (gnus-uncompress-range
1500 (cdr (assq 'tick (gnus-info-marks info))))
1501 (gnus-uncompress-range
1503 (gnus-info-marks info)))))
1504 nov-file (gnus-agent-article-name ".overview" group)
1507 (gnus-agent-load-alist group)
1508 (gnus-message 5 "Expiring articles in %s" group)
1509 (set-buffer overview)
1511 (when (file-exists-p nov-file)
1512 (nnheader-insert-file-contents nov-file))
1513 (goto-char (point-min))
1515 (while (setq elem (pop articles))
1516 (setq article (car elem))
1517 (when (or (null low)
1519 gnus-agent-expire-all
1520 (and (not (memq article unreads))
1521 (not (memq article marked))))
1522 ;; Find and nuke the NOV line.
1523 (while (and (not (eobp))
1525 (setq art (read (current-buffer)))))
1527 (if (and (numberp art)
1529 (gnus-agent-article-name
1530 (number-to-string art) group)))
1536 ;; Remove old NOV lines that have no articles.
1537 (gnus-delete-line)))
1542 ;; Nuke the article.
1543 (when (file-exists-p
1544 (setq file (gnus-agent-article-name
1545 (number-to-string article)
1548 ;; Schedule the history line for nuking.
1549 (push (cdr elem) histories)))
1550 (gnus-make-directory (file-name-directory nov-file))
1551 (let ((coding-system-for-write
1552 gnus-agent-file-coding-system))
1553 (write-region (point-min) (point-max) nov-file nil 'silent))
1554 ;; Delete the unwanted entries in the alist.
1555 (setq gnus-agent-article-alist
1556 (sort gnus-agent-article-alist 'car-less-than-car))
1557 (let* ((alist gnus-agent-article-alist)
1558 (prev (cons nil alist))
1562 (<= (caar alist) article))
1563 (if (or (not (cdar alist))
1565 (gnus-agent-article-name
1570 (push (caar alist) expired)
1571 (setcdr prev (setq alist (cdr alist))))
1573 alist (cdr alist))))
1574 (setq gnus-agent-article-alist (cdr first))
1575 (gnus-agent-save-alist group)
1576 ;; Mark all articles up to the first article
1577 ;; in `gnus-article-alist' as read.
1578 (when (and info (caar gnus-agent-article-alist))
1579 (setcar (nthcdr 2 info)
1582 (cons 1 (- (caar gnus-agent-article-alist) 1)))))
1583 ;; Maybe everything has been expired from `gnus-article-alist'
1584 ;; and so the above marking as read could not be conducted,
1585 ;; or there are expired article within the range of the alist.
1588 (or (not (caar gnus-agent-article-alist))
1590 (caar gnus-agent-article-alist))))
1591 (setcar (nthcdr 2 info)
1594 (nreverse expired))))
1596 (concat "(gnus-group-set-info '"
1597 (gnus-prin1-to-string info)
1600 (if (gnus-gethash group orig)
1601 (setcar (gnus-gethash group orig) lowest)
1602 (gnus-sethash group (cons lowest highest) orig))))
1604 (set-buffer history)
1605 (setq histories (nreverse (sort histories '<)))
1607 (goto-char (pop histories))
1609 (gnus-agent-save-history)
1610 (gnus-agent-close-history)
1611 (gnus-write-active-file
1612 (gnus-agent-lib-file "active") orig))
1613 (gnus-message 4 "Expiry...done")))))))
1616 (defun gnus-agent-batch ()
1618 (let ((init-file-user "")
1619 (gnus-always-read-dribble-file t))
1621 (gnus-group-send-drafts)
1622 (gnus-agent-fetch-session))
1624 (provide 'gnus-agent)
1626 ;;; gnus-agent.el ends here