1 ;;; gnus-agent.el --- unplugged support for Gnus
2 ;; Copyright (C) 1997,98 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.
30 (eval-when-compile (require 'cl))
32 (defcustom gnus-agent-directory (nnheader-concat gnus-directory "agent/")
33 "Where the Gnus agent will store its files."
37 (defcustom gnus-agent-plugged-hook nil
38 "Hook run when plugging into the network."
42 (defcustom gnus-agent-unplugged-hook nil
43 "Hook run when unplugging from the network."
47 (defcustom gnus-agent-handle-level gnus-level-subscribed
48 "Groups on levels higher than this variable will be ignored by the Agent."
52 (defcustom gnus-agent-expire-days 7
53 "Read articles older than this will be expired."
57 (defcustom gnus-agent-expire-all nil
58 "If non-nil, also expire unread, ticked and dormant articles.
59 If nil, only read articles will be expired."
63 (defcustom gnus-agent-group-mode-hook nil
64 "Hook run in Agent group minor modes."
68 (defcustom gnus-agent-summary-mode-hook nil
69 "Hook run in Agent summary minor modes."
73 (defcustom gnus-agent-server-mode-hook nil
74 "Hook run in Agent summary minor modes."
78 ;;; Internal variables
80 (defvar gnus-agent-meta-information-header "X-Gnus-Agent-Meta-Information")
82 (defvar gnus-agent-history-buffers nil)
83 (defvar gnus-agent-buffer-alist nil)
84 (defvar gnus-agent-article-alist nil)
85 (defvar gnus-agent-group-alist nil)
86 (defvar gnus-agent-covered-methods nil)
87 (defvar gnus-category-alist nil)
88 (defvar gnus-agent-current-history nil)
89 (defvar gnus-agent-overview-buffer nil)
90 (defvar gnus-category-predicate-cache nil)
91 (defvar gnus-category-group-cache nil)
92 (defvar gnus-agent-spam-hashtb nil)
93 (defvar gnus-agent-file-name nil)
94 (defvar gnus-agent-send-mail-function nil)
95 (defvar gnus-agent-article-file-coding-system 'no-conversion)
105 (defun gnus-open-agent ()
107 (gnus-agent-read-servers)
109 (setq gnus-agent-overview-buffer
110 (gnus-get-buffer-create " *Gnus agent overview*"))
111 (add-hook 'gnus-group-mode-hook 'gnus-agent-mode)
112 (add-hook 'gnus-summary-mode-hook 'gnus-agent-mode)
113 (add-hook 'gnus-server-mode-hook 'gnus-agent-mode))
115 (gnus-add-shutdown 'gnus-close-agent 'gnus)
117 (defun gnus-close-agent ()
118 (setq gnus-agent-covered-methods nil
119 gnus-category-predicate-cache nil
120 gnus-category-group-cache nil
121 gnus-agent-spam-hashtb nil)
122 (gnus-kill-buffer gnus-agent-overview-buffer))
125 ;;; Utility functions
128 (defun gnus-agent-read-file (file)
129 "Load FILE and do a `read' there."
130 (nnheader-temp-write nil
132 (nnheader-insert-file-contents file)
133 (goto-char (point-min))
134 (read (current-buffer)))))
136 (defsubst gnus-agent-method ()
137 (concat (symbol-name (car gnus-command-method)) "/"
138 (if (equal (cadr gnus-command-method) "")
140 (cadr gnus-command-method))))
142 (defsubst gnus-agent-directory ()
143 "Path of the Gnus agent directory."
144 (nnheader-concat gnus-agent-directory
145 (nnheader-translate-file-chars (gnus-agent-method)) "/"))
147 (defun gnus-agent-lib-file (file)
148 "The full path of the Gnus agent library FILE."
149 (concat (gnus-agent-directory) "agent.lib/" file))
151 ;;; Fetching setup functions.
153 (defun gnus-agent-start-fetch ()
154 "Initialize data structures for efficient fetching."
155 (gnus-agent-open-history)
156 (setq gnus-agent-current-history (gnus-agent-history-buffer)))
158 (defun gnus-agent-stop-fetch ()
159 "Save all data structures and clean up."
160 (gnus-agent-save-history)
161 (gnus-agent-close-history)
162 (setq gnus-agent-spam-hashtb nil)
164 (set-buffer nntp-server-buffer)
167 (defmacro gnus-agent-with-fetch (&rest forms)
171 (gnus-agent-start-fetch)
173 (gnus-agent-stop-fetch)))
175 (put 'gnus-agent-with-fetch 'lisp-indent-function 0)
176 (put 'gnus-agent-with-fetch 'edebug-form-spec '(body))
182 (defvar gnus-agent-mode-hook nil
183 "Hook run when installing agent mode.")
185 (defvar gnus-agent-mode nil)
186 (defvar gnus-agent-mode-status '(gnus-agent-mode " Plugged"))
188 (defun gnus-agent-mode ()
189 "Minor mode for providing a agent support in Gnus buffers."
190 (let* ((buffer (progn (string-match "^gnus-\\(.*\\)-mode$"
191 (symbol-name major-mode))
192 (match-string 1 (symbol-name major-mode))))
193 (mode (intern (format "gnus-agent-%s-mode" buffer))))
194 (set (make-local-variable 'gnus-agent-mode) t)
196 (set (make-local-variable mode) t)
198 (when (gnus-visual-p 'agent-menu 'menu)
199 (funcall (intern (format "gnus-agent-%s-make-menu-bar" buffer))))
200 (unless (assq 'gnus-agent-mode minor-mode-alist)
201 (push gnus-agent-mode-status minor-mode-alist))
202 (unless (assq mode minor-mode-map-alist)
203 (push (cons mode (symbol-value (intern (format "gnus-agent-%s-mode-map"
205 minor-mode-map-alist))
206 (when (eq major-mode 'gnus-group-mode)
207 (gnus-agent-toggle-plugged gnus-plugged))
208 (gnus-run-hooks 'gnus-agent-mode-hook
209 (intern (format "gnus-agent-%s-mode-hook" buffer)))))
211 (defvar gnus-agent-group-mode-map (make-sparse-keymap))
212 (gnus-define-keys gnus-agent-group-mode-map
213 "Ju" gnus-agent-fetch-groups
214 "Jc" gnus-enter-category-buffer
215 "Jj" gnus-agent-toggle-plugged
216 "Js" gnus-agent-fetch-session
217 "JS" gnus-group-send-drafts
218 "Ja" gnus-agent-add-group)
220 (defun gnus-agent-group-make-menu-bar ()
221 (unless (boundp 'gnus-agent-group-menu)
223 gnus-agent-group-menu gnus-agent-group-mode-map ""
225 ["Toggle plugged" gnus-agent-toggle-plugged t]
226 ["List categories" gnus-enter-category-buffer t]
227 ["Send drafts" gnus-group-send-drafts gnus-plugged]
229 ["All" gnus-agent-fetch-session gnus-plugged]
230 ["Group" gnus-agent-fetch-group gnus-plugged])))))
232 (defvar gnus-agent-summary-mode-map (make-sparse-keymap))
233 (gnus-define-keys gnus-agent-summary-mode-map
234 "Jj" gnus-agent-toggle-plugged
235 "J#" gnus-agent-mark-article
236 "J\M-#" gnus-agent-unmark-article
237 "@" gnus-agent-toggle-mark
238 "Jc" gnus-agent-catchup)
240 (defun gnus-agent-summary-make-menu-bar ()
241 (unless (boundp 'gnus-agent-summary-menu)
243 gnus-agent-summary-menu gnus-agent-summary-mode-map ""
245 ["Toggle plugged" gnus-agent-toggle-plugged t]
246 ["Mark as downloadable" gnus-agent-mark-article t]
247 ["Unmark as downloadable" gnus-agent-unmark-article t]
248 ["Toggle mark" gnus-agent-toggle-mark t]
249 ["Catchup undownloaded" gnus-agent-catchup t]))))
251 (defvar gnus-agent-server-mode-map (make-sparse-keymap))
252 (gnus-define-keys gnus-agent-server-mode-map
253 "Jj" gnus-agent-toggle-plugged
254 "Ja" gnus-agent-add-server
255 "Jr" gnus-agent-remove-server)
257 (defun gnus-agent-server-make-menu-bar ()
258 (unless (boundp 'gnus-agent-server-menu)
260 gnus-agent-server-menu gnus-agent-server-mode-map ""
262 ["Toggle plugged" gnus-agent-toggle-plugged t]
263 ["Add" gnus-agent-add-server t]
264 ["Remove" gnus-agent-remove-server t]))))
266 (defun gnus-agent-toggle-plugged (plugged)
267 "Toggle whether Gnus is unplugged or not."
268 (interactive (list (not gnus-plugged)))
271 (setq gnus-plugged plugged)
272 (gnus-run-hooks 'gnus-agent-plugged-hook)
273 (setcar (cdr gnus-agent-mode-status) " Plugged"))
274 (gnus-agent-close-connections)
275 (setq gnus-plugged plugged)
276 (gnus-run-hooks 'gnus-agent-unplugged-hook)
277 (setcar (cdr gnus-agent-mode-status) " Unplugged"))
278 (set-buffer-modified-p t))
280 (defun gnus-agent-close-connections ()
281 "Close all methods covered by the Gnus agent."
282 (let ((methods gnus-agent-covered-methods))
284 (gnus-close-server (pop methods)))))
287 (defun gnus-unplugged ()
288 "Start Gnus unplugged."
290 (setq gnus-plugged nil)
294 (defun gnus-plugged ()
295 "Start Gnus plugged."
297 (setq gnus-plugged t)
301 (defun gnus-agentize ()
302 "Allow Gnus to be an offline newsreader.
303 The normal usage of this command is to put the following as the
304 last form in your `.gnus.el' file:
308 This will modify the `gnus-before-startup-hook', `gnus-post-method',
309 and `message-send-mail-function' variables, and install the Gnus
310 agent minor mode in all Gnus buffers."
313 (add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
314 (unless gnus-agent-send-mail-function
315 (setq gnus-agent-send-mail-function message-send-mail-function
316 message-send-mail-function 'gnus-agent-send-mail))
317 (unless gnus-agent-covered-methods
318 (setq gnus-agent-covered-methods (list gnus-select-method))))
320 (defun gnus-agent-queue-setup ()
321 "Make sure the queue group exists."
322 (unless (gnus-gethash "nndraft:queue" gnus-newsrc-hashtb)
323 (gnus-request-create-group "queue" '(nndraft ""))
324 (let ((gnus-level-default-subscribed 1))
325 (gnus-subscribe-group "nndraft:queue" nil '(nndraft "")))
326 (gnus-group-set-parameter
327 "nndraft:queue" 'gnus-dummy '((gnus-draft-mode)))))
329 (defun gnus-agent-send-mail ()
331 (funcall gnus-agent-send-mail-function)
332 (goto-char (point-min))
334 (concat "^" (regexp-quote mail-header-separator) "\n"))
336 (gnus-agent-insert-meta-information 'mail)
337 (gnus-request-accept-article "nndraft:queue")))
339 (defun gnus-agent-insert-meta-information (type &optional method)
340 "Insert meta-information into the message that says how it's to be posted.
341 TYPE can be either `mail' or `news'. If the latter METHOD can
344 (message-remove-header gnus-agent-meta-information-header)
345 (goto-char (point-min))
346 (insert gnus-agent-meta-information-header ": "
347 (symbol-name type) " " (format "%S" method)
350 (while (search-backward "\n" nil t)
351 (replace-match "\\n" t t))))
354 ;;; Group mode commands
357 (defun gnus-agent-fetch-groups (n)
358 "Put all new articles in the current groups into the Agent."
360 (gnus-group-iterate n 'gnus-agent-fetch-group))
362 (defun gnus-agent-fetch-group (group)
363 "Put all new articles in GROUP into the Agent."
364 (interactive (list (gnus-group-group-name)))
366 (error "No group on the current line"))
367 (let ((gnus-command-method (gnus-find-method-for-group group)))
368 (gnus-agent-with-fetch
369 (gnus-agent-fetch-group-1 group gnus-command-method)
370 (gnus-message 5 "Fetching %s...done" group))))
372 (defun gnus-agent-add-group (category arg)
373 "Add the current group to an agent category."
379 (mapcar (lambda (cat) (list (symbol-name (car cat))))
383 (let ((cat (assq category gnus-category-alist))
385 (gnus-group-iterate arg
387 (when (cadddr (setq c (gnus-group-category group)))
388 (setf (cadddr c) (delete group (cadddr c))))
389 (push group groups)))
390 (setf (cadddr cat) (nconc (cadddr cat) groups))
391 (gnus-category-write)))
394 ;;; Server mode commands
397 (defun gnus-agent-add-server (server)
398 "Enroll SERVER in the agent program."
399 (interactive (list (gnus-server-server-name)))
401 (error "No server on the current line"))
402 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
403 (when (member method gnus-agent-covered-methods)
404 (error "Server already in the agent program"))
405 (push method gnus-agent-covered-methods)
406 (gnus-agent-write-servers)
407 (message "Entered %s into the Agent" server)))
409 (defun gnus-agent-remove-server (server)
410 "Remove SERVER from the agent program."
411 (interactive (list (gnus-server-server-name)))
413 (error "No server on the current line"))
414 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
415 (unless (member method gnus-agent-covered-methods)
416 (error "Server not in the agent program"))
417 (setq gnus-agent-covered-methods
418 (delete method gnus-agent-covered-methods))
419 (gnus-agent-write-servers)
420 (message "Removed %s from the agent" server)))
422 (defun gnus-agent-read-servers ()
423 "Read the alist of covered servers."
424 (setq gnus-agent-covered-methods
425 (gnus-agent-read-file
426 (nnheader-concat gnus-agent-directory "lib/servers"))))
428 (defun gnus-agent-write-servers ()
429 "Write the alist of covered servers."
430 (nnheader-temp-write (nnheader-concat gnus-agent-directory "lib/servers")
431 (prin1 gnus-agent-covered-methods (current-buffer))))
437 (defun gnus-agent-mark-article (n &optional unmark)
438 "Mark the next N articles as downloadable.
439 If N is negative, mark backward instead. If UNMARK is non-nil, remove
440 the mark instead. The difference between N and the actual number of
441 articles marked is returned."
443 (let ((backward (< n 0))
448 (gnus-summary-set-agent-mark
449 (gnus-summary-article-number) unmark)
450 (zerop (gnus-summary-next-subject (if backward -1 1) nil t))))
453 (gnus-message 7 "No more articles"))
454 (gnus-summary-recenter)
455 (gnus-summary-position-point)
458 (defun gnus-agent-unmark-article (n)
459 "Remove the downloadable mark from the next N articles.
460 If N is negative, unmark backward instead. The difference between N and
461 the actual number of articles unmarked is returned."
463 (gnus-agent-mark-article n t))
465 (defun gnus-agent-toggle-mark (n)
466 "Toggle the downloadable mark from the next N articles.
467 If N is negative, toggle backward instead. The difference between N and
468 the actual number of articles toggled is returned."
470 (gnus-agent-mark-article n 'toggle))
472 (defun gnus-summary-set-agent-mark (article &optional unmark)
473 "Mark ARTICLE as downloadable."
474 (let ((unmark (if (and (not (null unmark)) (not (eq t unmark)))
475 (memq article gnus-newsgroup-downloadable)
479 (setq gnus-newsgroup-downloadable
480 (delq article gnus-newsgroup-downloadable))
481 (push article gnus-newsgroup-undownloaded))
482 (setq gnus-newsgroup-undownloaded
483 (delq article gnus-newsgroup-undownloaded))
484 (push article gnus-newsgroup-downloadable))
485 (gnus-summary-update-mark
486 (if unmark gnus-undownloaded-mark gnus-downloadable-mark)
489 (defun gnus-agent-get-undownloaded-list ()
490 "Mark all unfetched articles as read."
491 (let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
492 (when (and (not gnus-plugged)
493 (gnus-agent-method-p gnus-command-method))
494 (gnus-agent-load-alist gnus-newsgroup-name)
495 (let ((articles gnus-newsgroup-unreads)
497 (while (setq article (pop articles))
498 (unless (or (cdr (assq article gnus-agent-article-alist))
499 (memq article gnus-newsgroup-downloadable))
500 (push article gnus-newsgroup-undownloaded)))))))
502 (defun gnus-agent-catchup ()
503 "Mark all undownloaded articles as read."
506 (while gnus-newsgroup-undownloaded
507 (gnus-summary-mark-article
508 (pop gnus-newsgroup-undownloaded) gnus-catchup-mark)))
509 (gnus-summary-position-point))
512 ;;; Internal functions
515 (defun gnus-agent-save-active (method)
516 (when (gnus-agent-method-p method)
517 (let* ((gnus-command-method method)
518 (file (gnus-agent-lib-file "active")))
519 (gnus-make-directory (file-name-directory file))
520 (let ((coding-system-for-write gnus-agent-article-file-coding-system))
521 (write-region (point-min) (point-max) file nil 'silent))
522 (when (file-exists-p (gnus-agent-lib-file "groups"))
523 (delete-file (gnus-agent-lib-file "groups"))))))
525 (defun gnus-agent-save-groups (method)
526 (let* ((gnus-command-method method)
527 (file (gnus-agent-lib-file "groups")))
528 (gnus-make-directory (file-name-directory file))
529 (write-region (point-min) (point-max) file nil 'silent))
530 (when (file-exists-p (gnus-agent-lib-file "active"))
531 (delete-file (gnus-agent-lib-file "active"))))
533 (defun gnus-agent-save-group-info (method group active)
534 (when (gnus-agent-method-p method)
535 (let* ((gnus-command-method method)
536 (file (if nntp-server-list-active-group
537 (gnus-agent-lib-file "active")
538 (gnus-agent-lib-file "groups"))))
539 (gnus-make-directory (file-name-directory file))
540 (nnheader-temp-write file
541 (when (file-exists-p file)
542 (nnheader-insert-file-contents file))
543 (goto-char (point-min))
544 (if nntp-server-list-active-group
546 (when (re-search-forward
547 (concat "^" (regexp-quote group) " ") nil t)
549 (insert group " " (number-to-string (cdr active)) " "
550 (number-to-string (car active)) "\n"))
551 (when (re-search-forward (concat (regexp-quote group) " ") nil t)
553 (insert-buffer-substring nntp-server-buffer))))))
555 (defun gnus-agent-group-path (group)
556 "Translate GROUP into a path."
557 (if nnmail-use-long-file-names
558 (gnus-group-real-name group)
559 (nnheader-replace-chars-in-string
560 (nnheader-translate-file-chars (gnus-group-real-name group))
565 (defun gnus-agent-method-p (method)
566 "Say whether METHOD is covered by the agent."
567 (member method gnus-agent-covered-methods))
569 (defun gnus-agent-get-function (method)
570 (if (and (not gnus-plugged)
571 (gnus-agent-method-p method))
577 ;;; History functions
579 (defun gnus-agent-history-buffer ()
580 (cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))
582 (defun gnus-agent-open-history ()
584 (push (cons (gnus-agent-method)
585 (set-buffer (gnus-get-buffer-create
586 (format " *Gnus agent %s history*"
587 (gnus-agent-method)))))
588 gnus-agent-history-buffers)
591 (let ((file (gnus-agent-lib-file "history")))
592 (when (file-exists-p file)
594 (set (make-local-variable 'gnus-agent-file-name) file))))
596 (defun gnus-agent-save-history ()
598 (set-buffer gnus-agent-current-history)
599 (gnus-make-directory (file-name-directory gnus-agent-file-name))
600 (write-region (1+ (point-min)) (point-max)
601 gnus-agent-file-name nil 'silent)))
603 (defun gnus-agent-close-history ()
604 (when (gnus-buffer-live-p gnus-agent-current-history)
605 (kill-buffer gnus-agent-current-history)
606 (setq gnus-agent-history-buffers
607 (delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
608 gnus-agent-history-buffers))))
610 (defun gnus-agent-enter-history (id group-arts date)
612 (set-buffer gnus-agent-current-history)
613 (goto-char (point-max))
614 (insert id "\t" (number-to-string date) "\t")
616 (insert (caar group-arts) " " (number-to-string (cdr (pop group-arts)))
620 (defun gnus-agent-article-in-history-p (id)
622 (set-buffer (gnus-agent-history-buffer))
623 (goto-char (point-min))
624 (search-forward (concat "\n" id "\t") nil t)))
626 (defun gnus-agent-history-path (id)
628 (set-buffer (gnus-agent-history-buffer))
629 (goto-char (point-min))
630 (when (search-forward (concat "\n" id "\t") nil t)
631 (let ((method (gnus-agent-method)))
633 (while (not (numberp (setq group (read (current-buffer)))))
634 (push (concat method "/" group) paths))
635 (nreverse paths))))))
641 (defun gnus-agent-fetch-articles (group articles)
642 "Fetch ARTICLES from GROUP and put them into the Agent."
644 ;; Prune off articles that we have already fetched.
646 (cdr (assq (car articles) gnus-agent-article-alist)))
648 (let ((arts articles))
650 (if (cdr (assq (cadr arts) gnus-agent-article-alist))
651 (setcdr arts (cddr arts))
652 (setq arts (cdr arts)))))
655 (gnus-agent-directory)
656 (gnus-agent-group-path group) "/"))
657 (date (gnus-time-to-day (current-time)))
660 (gnus-make-directory dir)
661 (gnus-message 7 "Fetching articles for %s..." group)
662 ;; Fetch the articles from the backend.
663 (if (gnus-check-backend-function 'retrieve-articles group)
664 (setq pos (gnus-retrieve-articles articles group))
665 (nnheader-temp-write nil
667 (while (setq article (pop articles))
668 (when (gnus-request-article article group)
669 (goto-char (point-max))
670 (push (cons article (point)) pos)
671 (insert-buffer-substring nntp-server-buffer)))
672 (copy-to-buffer nntp-server-buffer (point-min) (point-max))
673 (setq pos (nreverse pos)))))
674 ;; Then save these articles into the Agent.
676 (set-buffer nntp-server-buffer)
678 (narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
679 (goto-char (point-min))
680 (when (search-forward "\n\n" nil t)
681 (when (search-backward "\nXrefs: " nil t)
682 ;; Handle crossposting.
683 (skip-chars-forward "^ ")
684 (skip-chars-forward " ")
686 (while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) +")
687 (push (cons (buffer-substring (match-beginning 1)
689 (buffer-substring (match-beginning 2)
692 (goto-char (match-end 0)))
693 (gnus-agent-crosspost crosses (caar pos))))
694 (goto-char (point-min))
695 (if (not (re-search-forward "^Message-ID: *<\\([^>\n]+\\)>" nil t))
696 (setq id "No-Message-ID-in-article")
697 (setq id (buffer-substring (match-beginning 1) (match-end 1))))
698 (let ((coding-system-for-write
699 gnus-agent-article-file-coding-system))
700 (write-region (point-min) (point-max)
701 (concat dir (number-to-string (caar pos)))
703 (when (setq elem (assq (caar pos) gnus-agent-article-alist))
705 (gnus-agent-enter-history
706 id (or crosses (list (cons group (caar pos)))) date)
709 (gnus-agent-save-alist group)))))
711 (defun gnus-agent-crosspost (crosses article)
712 (let (gnus-agent-article-alist group alist beg end)
714 (set-buffer gnus-agent-overview-buffer)
715 (when (nnheader-find-nov-line article)
718 (setq end (progn (forward-line 1) (point)))))
720 (setq group (caar crosses))
721 (unless (setq alist (assoc group gnus-agent-group-alist))
722 (push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
723 gnus-agent-group-alist))
724 (setcdr alist (cons (cons (cdar crosses) t) (cdr alist)))
726 (set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
728 (when (= (point-max) (point-min))
729 (push (cons group (current-buffer)) gnus-agent-buffer-alist)
731 (nnheader-insert-file-contents
732 (gnus-agent-article-name ".overview" group))))
733 (nnheader-find-nov-line (string-to-number (cdar crosses)))
734 (insert (string-to-number (cdar crosses)))
735 (insert-buffer-substring gnus-agent-overview-buffer beg end))
738 (defun gnus-agent-flush-cache ()
740 (while gnus-agent-buffer-alist
741 (set-buffer (cdar gnus-agent-buffer-alist))
742 (write-region (point-min) (point-max)
743 (gnus-agent-article-name ".overview"
744 (caar gnus-agent-buffer-alist))
746 (pop gnus-agent-buffer-alist))
747 (while gnus-agent-group-alist
748 (nnheader-temp-write (caar gnus-agent-group-alist)
749 (princ (cdar gnus-agent-group-alist))
751 (pop gnus-agent-group-alist))))
753 (defun gnus-agent-fetch-headers (group &optional force)
754 (let ((articles (if (gnus-agent-load-alist group)
755 (gnus-sorted-intersection
756 (gnus-list-of-unread-articles group)
757 (gnus-uncompress-range
758 (cons (1+ (caar (last gnus-agent-article-alist)))
759 (cdr (gnus-active group)))))
760 (gnus-list-of-unread-articles group))))
763 (gnus-message 7 "Fetching headers for %s..." group)
765 (set-buffer nntp-server-buffer)
766 (unless (eq 'nov (gnus-retrieve-headers articles group))
767 (nnvirtual-convert-headers))
768 ;; Save these headers for later processing.
769 (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
772 (setq file (gnus-agent-article-name ".overview" group)))
773 (gnus-agent-braid-nov group articles file))
774 (gnus-make-directory (nnheader-translate-file-chars
775 (file-name-directory file)))
776 (write-region (point-min) (point-max) file nil 'silent)
777 (gnus-agent-save-alist group articles nil)
778 (gnus-agent-enter-history
779 "last-header-fetched-for-session"
780 (list (cons group (nth (- (length articles) 1) articles)))
781 (gnus-time-to-day (current-time)))
784 (defsubst gnus-agent-copy-nov-line (article)
786 (set-buffer gnus-agent-overview-buffer)
788 (if (eq article (read (current-buffer)))
789 (setq e (progn (forward-line 1) (point)))
793 (set-buffer nntp-server-buffer)
794 (insert-buffer-substring gnus-agent-overview-buffer b e)))
796 (defun gnus-agent-braid-nov (group articles file)
797 (set-buffer gnus-agent-overview-buffer)
798 (goto-char (point-min))
799 (set-buffer nntp-server-buffer)
801 (nnheader-insert-file-contents file)
802 (goto-char (point-max))
803 (if (or (= (point-min) (point-max))
806 (< (read (current-buffer)) (car articles))))
807 ;; We have only headers that are after the older headers,
808 ;; so we just append them.
810 (goto-char (point-max))
811 (insert-buffer-substring gnus-agent-overview-buffer))
812 ;; We do it the hard way.
813 (nnheader-find-nov-line (car articles))
814 (gnus-agent-copy-nov-line (car articles))
818 (while (and (not (eobp))
819 (< (read (current-buffer)) (car articles)))
823 (gnus-agent-copy-nov-line (car articles))
824 (setq articles (cdr articles))))
827 (set-buffer gnus-agent-overview-buffer)
830 (set-buffer nntp-server-buffer)
831 (insert-buffer-substring gnus-agent-overview-buffer b e)))))
833 (defun gnus-agent-load-alist (group &optional dir)
834 "Load the article-state alist for GROUP."
835 (setq gnus-agent-article-alist
836 (gnus-agent-read-file
838 (concat dir ".agentview")
839 (gnus-agent-article-name ".agentview" group)))))
841 (defun gnus-agent-save-alist (group &optional articles state dir)
842 "Save the article-state alist for GROUP."
843 (nnheader-temp-write (if dir
844 (concat dir ".agentview")
845 (gnus-agent-article-name ".agentview" group))
846 (princ (setq gnus-agent-article-alist
847 (nconc gnus-agent-article-alist
848 (mapcar (lambda (article) (cons article state))
853 (defun gnus-agent-article-name (article group)
854 (concat (gnus-agent-directory) (gnus-agent-group-path group) "/"
855 (if (stringp article) article (string-to-number article))))
858 (defun gnus-agent-batch-fetch ()
859 "Start Gnus and fetch session."
862 (gnus-agent-fetch-session)
865 (defun gnus-agent-fetch-session ()
866 "Fetch all articles and headers that are eligible for fetching."
868 (unless gnus-agent-covered-methods
869 (error "No servers are covered by the Gnus agent"))
871 (error "Can't fetch articles while Gnus is unplugged"))
872 (let ((methods gnus-agent-covered-methods)
873 groups group gnus-command-method)
876 (setq gnus-command-method (car methods))
877 (when (or (gnus-server-opened gnus-command-method)
878 (gnus-open-server gnus-command-method))
879 (setq groups (gnus-groups-from-server (car methods)))
880 (gnus-agent-with-fetch
881 (while (setq group (pop groups))
882 (when (<= (gnus-group-level group) gnus-agent-handle-level)
883 (gnus-agent-fetch-group-1 group gnus-command-method)))))
885 (gnus-message 6 "Finished fetching articles into the Gnus agent"))))
887 (defun gnus-agent-fetch-group-1 (group method)
889 (let ((gnus-command-method method)
890 gnus-newsgroup-dependencies gnus-newsgroup-headers
891 gnus-newsgroup-scored gnus-headers gnus-score
892 gnus-use-cache articles arts
893 category predicate info marks score-param)
895 (when (and (or (gnus-active group) (gnus-activate-group group))
896 (setq articles (gnus-agent-fetch-headers group)))
897 ;; Parse them and see which articles we want to fetch.
898 (setq gnus-newsgroup-dependencies
899 (make-vector (length articles) 0))
900 (setq gnus-newsgroup-headers
901 (gnus-get-newsgroup-headers-xover articles nil nil group))
902 (setq category (gnus-group-category group))
905 (or (gnus-group-get-parameter group 'agent-predicate)
908 (or (gnus-group-get-parameter group 'agent-score)
911 (gnus-score-headers (list (list score-param))))
913 (while (setq gnus-headers (pop gnus-newsgroup-headers))
915 (or (cdr (assq (mail-header-number gnus-headers)
916 gnus-newsgroup-scored))
917 gnus-summary-default-score))
918 (when (funcall predicate)
919 (push (mail-header-number gnus-headers)
921 ;; Fetch the articles.
923 (gnus-agent-fetch-articles group arts)))
924 ;; Perhaps we have some additional articles to fetch.
925 (setq arts (assq 'download (gnus-info-marks
926 (setq info (gnus-get-info group)))))
928 (gnus-agent-fetch-articles
929 group (gnus-uncompress-range (cdr arts)))
930 (setq marks (delq arts (gnus-info-marks info)))
931 (gnus-info-set-marks info marks))))
934 ;;; Agent Category Mode
937 (defvar gnus-category-mode-hook nil
938 "Hook run in `gnus-category-mode' buffers.")
940 (defvar gnus-category-line-format " %(%20c%): %g\n"
941 "Format of category lines.")
943 (defvar gnus-category-mode-line-format "Gnus: %%b"
944 "The format specification for the category mode line.")
946 (defvar gnus-agent-short-article 100
947 "Articles that have fewer lines than this are short.")
949 (defvar gnus-agent-long-article 200
950 "Articles that have more lines than this are long.")
952 (defvar gnus-agent-low-score 0
953 "Articles that have a score lower than this have a low score.")
955 (defvar gnus-agent-high-score 0
956 "Articles that have a score higher than this have a high score.")
959 ;;; Internal variables.
961 (defvar gnus-category-buffer "*Agent Category*")
963 (defvar gnus-category-line-format-alist
964 `((?c gnus-tmp-name ?s)
965 (?g gnus-tmp-groups ?d)))
967 (defvar gnus-category-mode-line-format-alist
968 `((?u user-defined ?s)))
970 (defvar gnus-category-line-format-spec nil)
971 (defvar gnus-category-mode-line-format-spec nil)
973 (defvar gnus-category-mode-map nil)
974 (put 'gnus-category-mode 'mode-class 'special)
976 (unless gnus-category-mode-map
977 (setq gnus-category-mode-map (make-sparse-keymap))
978 (suppress-keymap gnus-category-mode-map)
980 (gnus-define-keys gnus-category-mode-map
981 "q" gnus-category-exit
982 "k" gnus-category-kill
983 "c" gnus-category-copy
984 "a" gnus-category-add
985 "p" gnus-category-edit-predicate
986 "g" gnus-category-edit-groups
987 "s" gnus-category-edit-score
988 "l" gnus-category-list
990 "\C-c\C-i" gnus-info-find-node
991 "\C-c\C-b" gnus-bug))
993 (defvar gnus-category-menu-hook nil
994 "*Hook run after the creation of the menu.")
996 (defun gnus-category-make-menu-bar ()
997 (gnus-turn-off-edit-menu 'category)
998 (unless (boundp 'gnus-category-menu)
1000 gnus-category-menu gnus-category-mode-map ""
1002 ["Add" gnus-category-add t]
1003 ["Kill" gnus-category-kill t]
1004 ["Copy" gnus-category-copy t]
1005 ["Edit predicate" gnus-category-edit-predicate t]
1006 ["Edit score" gnus-category-edit-score t]
1007 ["Edit groups" gnus-category-edit-groups t]
1008 ["Exit" gnus-category-exit t]))
1010 (gnus-run-hooks 'gnus-category-menu-hook)))
1012 (defun gnus-category-mode ()
1013 "Major mode for listing and editing agent categories.
1015 All normal editing commands are switched off.
1016 \\<gnus-category-mode-map>
1017 For more in-depth information on this mode, read the manual
1018 (`\\[gnus-info-find-node]').
1020 The following commands are available:
1022 \\{gnus-category-mode-map}"
1024 (when (gnus-visual-p 'category-menu 'menu)
1025 (gnus-category-make-menu-bar))
1026 (kill-all-local-variables)
1027 (gnus-simplify-mode-line)
1028 (setq major-mode 'gnus-category-mode)
1029 (setq mode-name "Category")
1030 (gnus-set-default-directory)
1031 (setq mode-line-process nil)
1032 (use-local-map gnus-category-mode-map)
1033 (buffer-disable-undo (current-buffer))
1034 (setq truncate-lines t)
1035 (setq buffer-read-only t)
1036 (gnus-run-hooks 'gnus-category-mode-hook))
1038 (defalias 'gnus-category-position-point 'gnus-goto-colon)
1040 (defun gnus-category-insert-line (category)
1041 (let* ((gnus-tmp-name (car category))
1042 (gnus-tmp-groups (length (cadddr category))))
1044 (gnus-add-text-properties
1048 (eval gnus-category-line-format-spec))
1049 (list 'gnus-category gnus-tmp-name))))
1051 (defun gnus-enter-category-buffer ()
1052 "Go to the Category buffer."
1054 (gnus-category-setup-buffer)
1055 (gnus-configure-windows 'category)
1056 (gnus-category-prepare))
1058 (defun gnus-category-setup-buffer ()
1059 (unless (get-buffer gnus-category-buffer)
1061 (set-buffer (gnus-get-buffer-create gnus-category-buffer))
1062 (gnus-category-mode))))
1064 (defun gnus-category-prepare ()
1065 (gnus-set-format 'category-mode)
1066 (gnus-set-format 'category t)
1067 (let ((alist gnus-category-alist)
1068 (buffer-read-only nil))
1071 (gnus-category-insert-line (pop alist)))
1072 (goto-char (point-min))
1073 (gnus-category-position-point)))
1075 (defun gnus-category-name ()
1076 (or (get-text-property (gnus-point-at-bol) 'gnus-category)
1077 (error "No category on the current line")))
1079 (defun gnus-category-read ()
1080 "Read the category alist."
1081 (setq gnus-category-alist
1082 (or (gnus-agent-read-file
1083 (nnheader-concat gnus-agent-directory "lib/categories"))
1084 (list (list 'default 'short nil nil)))))
1086 (defun gnus-category-write ()
1087 "Write the category alist."
1088 (setq gnus-category-predicate-cache nil
1089 gnus-category-group-cache nil)
1090 (nnheader-temp-write (nnheader-concat gnus-agent-directory "lib/categories")
1091 (prin1 gnus-category-alist (current-buffer))))
1093 (defun gnus-category-edit-predicate (category)
1094 "Edit the predicate for CATEGORY."
1095 (interactive (list (gnus-category-name)))
1096 (let ((info (assq category gnus-category-alist)))
1098 (cadr info) (format "Editing the predicate for category %s" category)
1099 `(lambda (predicate)
1100 (setf (cadr (assq ',category gnus-category-alist)) predicate)
1101 (gnus-category-write)
1102 (gnus-category-list)))))
1104 (defun gnus-category-edit-score (category)
1105 "Edit the score expression for CATEGORY."
1106 (interactive (list (gnus-category-name)))
1107 (let ((info (assq category gnus-category-alist)))
1110 (format "Editing the score expression for category %s" category)
1112 (setf (caddr (assq ',category gnus-category-alist)) groups)
1113 (gnus-category-write)
1114 (gnus-category-list)))))
1116 (defun gnus-category-edit-groups (category)
1117 "Edit the group list for CATEGORY."
1118 (interactive (list (gnus-category-name)))
1119 (let ((info (assq category gnus-category-alist)))
1121 (cadddr info) (format "Editing the group list for category %s" category)
1123 (setf (cadddr (assq ',category gnus-category-alist)) groups)
1124 (gnus-category-write)
1125 (gnus-category-list)))))
1127 (defun gnus-category-kill (category)
1128 "Kill the current category."
1129 (interactive (list (gnus-category-name)))
1130 (let ((info (assq category gnus-category-alist))
1131 (buffer-read-only nil))
1133 (gnus-category-write)
1134 (setq gnus-category-alist (delq info gnus-category-alist))))
1136 (defun gnus-category-copy (category to)
1137 "Copy the current category."
1138 (interactive (list (gnus-category-name) (intern (read-string "New name: "))))
1139 (let ((info (assq category gnus-category-alist)))
1140 (push (list to (gnus-copy-sequence (cadr info))
1141 (gnus-copy-sequence (caddr info)) nil)
1142 gnus-category-alist)
1143 (gnus-category-write)
1144 (gnus-category-list)))
1146 (defun gnus-category-add (category)
1147 "Create a new category."
1148 (interactive "SCategory name: ")
1149 (when (assq category gnus-category-alist)
1150 (error "Category %s already exists" category))
1151 (push (list category 'true nil nil)
1152 gnus-category-alist)
1153 (gnus-category-write)
1154 (gnus-category-list))
1156 (defun gnus-category-list ()
1157 "List all categories."
1159 (gnus-category-prepare))
1161 (defun gnus-category-exit ()
1162 "Return to the group buffer."
1164 (kill-buffer (current-buffer))
1165 (gnus-configure-windows 'group t))
1167 ;; To avoid having 8-bit characters in the source file.
1168 (defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))
1170 (defvar gnus-category-predicate-alist
1171 '((spam . gnus-agent-spam-p)
1172 (short . gnus-agent-short-p)
1173 (long . gnus-agent-long-p)
1174 (low . gnus-agent-low-scored-p)
1175 (high . gnus-agent-high-scored-p)
1176 (true . gnus-agent-true)
1177 (false . gnus-agent-false))
1178 "Mapping from short score predicate symbols to predicate functions.")
1180 (defun gnus-agent-spam-p ()
1181 "Say whether an article is spam or not."
1182 (unless gnus-agent-spam-hashtb
1183 (setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
1184 (if (not (equal (mail-header-references gnus-headers) ""))
1186 (let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
1188 (gnus-gethash string gnus-agent-spam-hashtb)
1189 (gnus-sethash string t gnus-agent-spam-hashtb)))))
1191 (defun gnus-agent-short-p ()
1192 "Say whether an article is short or not."
1193 (< (mail-header-lines gnus-headers) gnus-agent-short-article))
1195 (defun gnus-agent-long-p ()
1196 "Say whether an article is long or not."
1197 (> (mail-header-lines gnus-headers) gnus-agent-long-article))
1199 (defun gnus-agent-low-scored-p ()
1200 "Say whether an article has a low score or not."
1201 (< gnus-score gnus-agent-low-score))
1203 (defun gnus-agent-high-scored-p ()
1204 "Say whether an article has a high score or not."
1205 (> gnus-score gnus-agent-high-score))
1207 (defun gnus-category-make-function (cat)
1208 "Make a function from category CAT."
1209 `(lambda () ,(gnus-category-make-function-1 cat)))
1211 (defun gnus-agent-true ()
1215 (defun gnus-agent-false ()
1219 (defun gnus-category-make-function-1 (cat)
1220 "Make a function from category CAT."
1222 ;; Functions are just returned as is.
1224 (gnus-functionp cat))
1225 `(,(or (cdr (assq cat gnus-category-predicate-alist))
1227 ;; More complex category.
1230 ((memq (car cat) '(& and))
1232 ((memq (car cat) '(| or))
1234 ((memq (car cat) gnus-category-not)
1236 ,@(mapcar 'gnus-category-make-function-1 (cdr cat))))
1238 (error "Unknown category type: %s" cat))))
1240 (defun gnus-get-predicate (predicate)
1241 "Return the predicate for CATEGORY."
1242 (or (cdr (assoc predicate gnus-category-predicate-cache))
1243 (cdar (push (cons predicate
1244 (gnus-category-make-function predicate))
1245 gnus-category-predicate-cache))))
1247 (defun gnus-group-category (group)
1248 "Return the category GROUP belongs to."
1249 (unless gnus-category-group-cache
1250 (setq gnus-category-group-cache (gnus-make-hashtable 1000))
1251 (let ((cs gnus-category-alist)
1253 (while (setq cat (pop cs))
1254 (setq groups (cadddr cat))
1256 (gnus-sethash (pop groups) cat gnus-category-group-cache)))))
1257 (or (gnus-gethash group gnus-category-group-cache)
1258 (assq 'default gnus-category-alist)))
1260 (defun gnus-agent-expire ()
1261 "Expire all old articles."
1263 (let ((methods gnus-agent-covered-methods)
1264 (day (- (gnus-time-to-day (current-time)) gnus-agent-expire-days))
1265 gnus-command-method sym group articles
1266 history overview file histories elem art nov-file low info
1267 unreads marked article)
1269 (setq overview (gnus-get-buffer-create " *expire overview*"))
1270 (while (setq gnus-command-method (pop methods))
1271 (let ((expiry-hashtb (gnus-make-hashtable 1023)))
1272 (gnus-agent-open-history)
1274 (setq gnus-agent-current-history
1275 (setq history (gnus-agent-history-buffer))))
1276 (goto-char (point-min))
1277 (when (> (buffer-size) 1)
1278 (goto-char (point-min))
1280 (skip-chars-forward "^\t")
1281 (if (> (read (current-buffer)) day)
1282 ;; New article; we don't expire it.
1284 ;; Old article. Schedule it for possible nuking.
1286 (setq sym (let ((obarray expiry-hashtb))
1287 (read (current-buffer))))
1289 (set sym (cons (cons (read (current-buffer)) (point))
1290 (symbol-value sym)))
1291 (set sym (list (cons (read (current-buffer)) (point)))))
1292 (skip-chars-forward " "))
1294 ;; We now have all articles that can possibly be expired.
1297 (setq group (symbol-name sym)
1298 articles (sort (symbol-value sym) 'car-less-than-car)
1299 low (car (gnus-active group))
1300 info (gnus-get-info group)
1301 unreads (ignore-errors (gnus-list-of-unread-articles group))
1302 marked (nconc (gnus-uncompress-range
1303 (cdr (assq 'tick (gnus-info-marks info))))
1304 (gnus-uncompress-range
1306 (gnus-info-marks info)))))
1307 nov-file (gnus-agent-article-name ".overview" group))
1308 (gnus-agent-load-alist group)
1309 (gnus-message 5 "Expiring articles in %s" group)
1310 (set-buffer overview)
1312 (when (file-exists-p nov-file)
1313 (nnheader-insert-file-contents nov-file))
1314 (goto-char (point-min))
1316 (while (setq elem (pop articles))
1317 (setq article (car elem))
1318 (when (or (null low)
1320 gnus-agent-expire-all
1321 (and (not (memq article unreads))
1322 (not (memq article marked))))
1323 ;; Find and nuke the NOV line.
1324 (while (and (not (eobp))
1326 (setq art (read (current-buffer)))))
1329 (gnus-agent-article-name
1330 (number-to-string art) group))
1332 ;; Remove old NOV lines that have no articles.
1333 (gnus-delete-line)))
1338 ;; Nuke the article.
1339 (when (file-exists-p (setq file (gnus-agent-article-name
1340 (number-to-string article)
1343 ;; Schedule the history line for nuking.
1344 (push (cdr elem) histories)))
1345 (gnus-make-directory (file-name-directory nov-file))
1346 (write-region (point-min) (point-max) nov-file nil 'silent)
1347 ;; Delete the unwanted entries in the alist.
1348 (setq gnus-agent-article-alist
1349 (sort gnus-agent-article-alist 'car-less-than-car))
1350 (let* ((alist gnus-agent-article-alist)
1351 (prev (cons nil alist))
1355 (<= (caar alist) article))
1356 (if (or (not (cdar alist))
1358 (gnus-agent-article-name
1363 (push (caar alist) expired)
1364 (setcdr prev (setq alist (cdr alist))))
1366 alist (cdr alist))))
1367 (setq gnus-agent-article-alist (cdr first))
1368 (gnus-agent-save-alist group)
1369 ;; Mark all articles up to the first article
1370 ;; in `gnus-article-alist' as read.
1371 (when (caar gnus-agent-article-alist)
1372 (setcar (nthcdr 2 info)
1375 (cons 1 (- (caar gnus-agent-article-alist) 1)))))
1376 ;; Maybe everything has been expired from `gnus-article-alist'
1377 ;; and so the above marking as read could not be conducted,
1378 ;; or there are expired article within the range of the alist.
1379 (when (or (not (caar gnus-agent-article-alist))
1380 (> (car expired) (caar gnus-agent-article-alist)))
1381 (setcar (nthcdr 2 info)
1384 (nreverse expired))))
1386 (concat "(gnus-group-set-info '"
1387 (gnus-prin1-to-string info)
1390 (set-buffer history)
1391 (setq histories (nreverse (sort histories '<)))
1393 (goto-char (pop histories))
1395 (gnus-agent-save-history)
1396 (gnus-agent-close-history))
1397 (gnus-message 4 "Expiry...done"))))))
1400 (defun gnus-agent-batch ()
1402 (let ((init-file-user "")
1403 (gnus-always-read-dribble-file t))
1405 (gnus-group-send-drafts)
1406 (gnus-agent-fetch-session))
1408 (provide 'gnus-agent)
1410 ;;; gnus-agent.el ends here