1 ;;; gnus-agent.el --- unplugged support for Semi-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-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 (write-region-as-coding-system
521 gnus-agent-file-coding-system (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-as-coding-system
530 gnus-agent-file-coding-system (point-min) (point-max) file nil 'silent)
531 (when (file-exists-p (gnus-agent-lib-file "active"))
532 (delete-file (gnus-agent-lib-file "active")))))
534 (defun gnus-agent-save-group-info (method group active)
535 (when (gnus-agent-method-p method)
536 (let* ((gnus-command-method method)
537 (file (if nntp-server-list-active-group
538 (gnus-agent-lib-file "active")
539 (gnus-agent-lib-file "groups"))))
540 (gnus-make-directory (file-name-directory file))
541 (nnheader-temp-write file
542 (when (file-exists-p file)
543 (nnheader-insert-file-contents file))
544 (goto-char (point-min))
545 (if nntp-server-list-active-group
547 (when (re-search-forward
548 (concat "^" (regexp-quote group) " ") nil t)
550 (insert group " " (number-to-string (cdr active)) " "
551 (number-to-string (car active)) " y\n"))
552 (when (re-search-forward (concat (regexp-quote group) " ") nil t)
554 (insert-buffer-substring nntp-server-buffer))))))
556 (defun gnus-agent-group-path (group)
557 "Translate GROUP into a path."
558 (if nnmail-use-long-file-names
559 (gnus-group-real-name group)
560 (nnheader-replace-chars-in-string
561 (nnheader-translate-file-chars (gnus-group-real-name group))
566 (defun gnus-agent-method-p (method)
567 "Say whether METHOD is covered by the agent."
568 (member method gnus-agent-covered-methods))
570 (defun gnus-agent-get-function (method)
571 (if (and (not gnus-plugged)
572 (gnus-agent-method-p method))
578 ;;; History functions
580 (defun gnus-agent-history-buffer ()
581 (cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))
583 (defun gnus-agent-open-history ()
585 (push (cons (gnus-agent-method)
586 (set-buffer (gnus-get-buffer-create
587 (format " *Gnus agent %s history*"
588 (gnus-agent-method)))))
589 gnus-agent-history-buffers)
592 (let ((file (gnus-agent-lib-file "history")))
593 (when (file-exists-p file)
595 (set (make-local-variable 'gnus-agent-file-name) file))))
597 (defun gnus-agent-save-history ()
599 (set-buffer gnus-agent-current-history)
600 (gnus-make-directory (file-name-directory gnus-agent-file-name))
601 (write-region-as-coding-system
602 gnus-agent-file-coding-system
603 (1+ (point-min)) (point-max) gnus-agent-file-name nil 'silent)))
605 (defun gnus-agent-close-history ()
606 (when (gnus-buffer-live-p gnus-agent-current-history)
607 (kill-buffer gnus-agent-current-history)
608 (setq gnus-agent-history-buffers
609 (delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
610 gnus-agent-history-buffers))))
612 (defun gnus-agent-enter-history (id group-arts date)
614 (set-buffer gnus-agent-current-history)
615 (goto-char (point-max))
616 (insert id "\t" (number-to-string date) "\t")
618 (insert (caar group-arts) " " (number-to-string (cdr (pop group-arts)))
622 (defun gnus-agent-article-in-history-p (id)
624 (set-buffer (gnus-agent-history-buffer))
625 (goto-char (point-min))
626 (search-forward (concat "\n" id "\t") nil t)))
628 (defun gnus-agent-history-path (id)
630 (set-buffer (gnus-agent-history-buffer))
631 (goto-char (point-min))
632 (when (search-forward (concat "\n" id "\t") nil t)
633 (let ((method (gnus-agent-method)))
635 (while (not (numberp (setq group (read (current-buffer)))))
636 (push (concat method "/" group) paths))
637 (nreverse paths))))))
643 (defun gnus-agent-fetch-articles (group articles)
644 "Fetch ARTICLES from GROUP and put them into the Agent."
646 ;; Prune off articles that we have already fetched.
648 (cdr (assq (car articles) gnus-agent-article-alist)))
650 (let ((arts articles))
652 (if (cdr (assq (cadr arts) gnus-agent-article-alist))
653 (setcdr arts (cddr arts))
654 (setq arts (cdr arts)))))
657 (gnus-agent-directory)
658 (gnus-agent-group-path group) "/"))
659 (date (gnus-time-to-day (current-time)))
662 (gnus-make-directory dir)
663 (gnus-message 7 "Fetching articles for %s..." group)
664 ;; Fetch the articles from the backend.
665 (if (gnus-check-backend-function 'retrieve-articles group)
666 (setq pos (gnus-retrieve-articles articles group))
667 (nnheader-temp-write nil
669 (while (setq article (pop articles))
670 (when (gnus-request-article article group)
671 (goto-char (point-max))
672 (push (cons article (point)) pos)
673 (insert-buffer-substring nntp-server-buffer)))
674 (copy-to-buffer nntp-server-buffer (point-min) (point-max))
675 (setq pos (nreverse pos)))))
676 ;; Then save these articles into the Agent.
678 (set-buffer nntp-server-buffer)
680 (narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
681 (goto-char (point-min))
682 (when (search-forward "\n\n" nil t)
683 (when (search-backward "\nXrefs: " nil t)
684 ;; Handle crossposting.
685 (skip-chars-forward "^ ")
686 (skip-chars-forward " ")
688 (while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) +")
689 (push (cons (buffer-substring (match-beginning 1)
691 (buffer-substring (match-beginning 2)
694 (goto-char (match-end 0)))
695 (gnus-agent-crosspost crosses (caar pos))))
696 (goto-char (point-min))
697 (if (not (re-search-forward "^Message-ID: *<\\([^>\n]+\\)>" nil t))
698 (setq id "No-Message-ID-in-article")
699 (setq id (buffer-substring (match-beginning 1) (match-end 1))))
700 (write-region-as-coding-system
701 gnus-agent-file-coding-system
702 (point-min) (point-max)
703 (concat dir (number-to-string (caar pos))) nil 'silent)
704 (when (setq elem (assq (caar pos) gnus-agent-article-alist))
706 (gnus-agent-enter-history
707 id (or crosses (list (cons group (caar pos)))) date)
710 (gnus-agent-save-alist group)))))
712 (defun gnus-agent-crosspost (crosses article)
713 (let (gnus-agent-article-alist group alist beg end)
715 (set-buffer gnus-agent-overview-buffer)
716 (when (nnheader-find-nov-line article)
719 (setq end (progn (forward-line 1) (point)))))
721 (setq group (caar crosses))
722 (unless (setq alist (assoc group gnus-agent-group-alist))
723 (push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
724 gnus-agent-group-alist))
725 (setcdr alist (cons (cons (cdar crosses) t) (cdr alist)))
727 (set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
729 (when (= (point-max) (point-min))
730 (push (cons group (current-buffer)) gnus-agent-buffer-alist)
732 (nnheader-insert-file-contents
733 (gnus-agent-article-name ".overview" group))))
734 (nnheader-find-nov-line (string-to-number (cdar crosses)))
735 (insert (string-to-number (cdar crosses)))
736 (insert-buffer-substring gnus-agent-overview-buffer beg end))
739 (defun gnus-agent-flush-cache ()
741 (while gnus-agent-buffer-alist
742 (set-buffer (cdar gnus-agent-buffer-alist))
743 (write-region-as-coding-system
744 gnus-agent-file-coding-system
745 (point-min) (point-max)
746 (gnus-agent-article-name ".overview"
747 (caar gnus-agent-buffer-alist))
749 (pop gnus-agent-buffer-alist))
750 (while gnus-agent-group-alist
751 (nnheader-temp-write (caar gnus-agent-group-alist)
752 (princ (cdar gnus-agent-group-alist))
754 (pop gnus-agent-group-alist))))
756 (defun gnus-agent-fetch-headers (group &optional force)
757 (let ((articles (if (gnus-agent-load-alist group)
758 (gnus-sorted-intersection
759 (gnus-list-of-unread-articles group)
760 (gnus-uncompress-range
761 (cons (1+ (caar (last gnus-agent-article-alist)))
762 (cdr (gnus-active group)))))
763 (gnus-list-of-unread-articles group))))
766 (gnus-message 7 "Fetching headers for %s..." group)
768 (set-buffer nntp-server-buffer)
769 (unless (eq 'nov (gnus-retrieve-headers articles group))
770 (nnvirtual-convert-headers))
771 ;; Save these headers for later processing.
772 (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
775 (setq file (gnus-agent-article-name ".overview" group)))
776 (gnus-agent-braid-nov group articles file))
777 (gnus-make-directory (nnheader-translate-file-chars
778 (file-name-directory file)))
779 (write-region-as-coding-system
780 gnus-agent-file-coding-system
781 (point-min) (point-max) file nil 'silent)
782 (gnus-agent-save-alist group articles nil)
783 (gnus-agent-enter-history
784 "last-header-fetched-for-session"
785 (list (cons group (nth (- (length articles) 1) articles)))
786 (gnus-time-to-day (current-time)))
789 (defsubst gnus-agent-copy-nov-line (article)
791 (set-buffer gnus-agent-overview-buffer)
793 (if (eq article (read (current-buffer)))
794 (setq e (progn (forward-line 1) (point)))
798 (set-buffer nntp-server-buffer)
799 (insert-buffer-substring gnus-agent-overview-buffer b e)))
801 (defun gnus-agent-braid-nov (group articles file)
802 (set-buffer gnus-agent-overview-buffer)
803 (goto-char (point-min))
804 (set-buffer nntp-server-buffer)
806 (nnheader-insert-file-contents file)
807 (goto-char (point-max))
808 (if (or (= (point-min) (point-max))
811 (< (read (current-buffer)) (car articles))))
812 ;; We have only headers that are after the older headers,
813 ;; so we just append them.
815 (goto-char (point-max))
816 (insert-buffer-substring gnus-agent-overview-buffer))
817 ;; We do it the hard way.
818 (nnheader-find-nov-line (car articles))
819 (gnus-agent-copy-nov-line (car articles))
823 (while (and (not (eobp))
824 (< (read (current-buffer)) (car articles)))
828 (gnus-agent-copy-nov-line (car articles))
829 (setq articles (cdr articles))))
832 (set-buffer gnus-agent-overview-buffer)
835 (set-buffer nntp-server-buffer)
836 (insert-buffer-substring gnus-agent-overview-buffer b e)))))
838 (defun gnus-agent-load-alist (group &optional dir)
839 "Load the article-state alist for GROUP."
840 (setq gnus-agent-article-alist
841 (gnus-agent-read-file
843 (concat dir ".agentview")
844 (gnus-agent-article-name ".agentview" group)))))
846 (defun gnus-agent-save-alist (group &optional articles state dir)
847 "Save the article-state alist for GROUP."
848 (nnheader-temp-write (if dir
849 (concat dir ".agentview")
850 (gnus-agent-article-name ".agentview" group))
851 (princ (setq gnus-agent-article-alist
852 (nconc gnus-agent-article-alist
853 (mapcar (lambda (article) (cons article state))
858 (defun gnus-agent-article-name (article group)
859 (concat (gnus-agent-directory) (gnus-agent-group-path group) "/"
860 (if (stringp article) article (string-to-number article))))
863 (defun gnus-agent-batch-fetch ()
864 "Start Gnus and fetch session."
867 (gnus-agent-fetch-session)
870 (defun gnus-agent-fetch-session ()
871 "Fetch all articles and headers that are eligible for fetching."
873 (unless gnus-agent-covered-methods
874 (error "No servers are covered by the Gnus agent"))
876 (error "Can't fetch articles while Gnus is unplugged"))
877 (let ((methods gnus-agent-covered-methods)
878 groups group gnus-command-method)
881 (setq gnus-command-method (car methods))
882 (when (or (gnus-server-opened gnus-command-method)
883 (gnus-open-server gnus-command-method))
884 (setq groups (gnus-groups-from-server (car methods)))
885 (gnus-agent-with-fetch
886 (while (setq group (pop groups))
887 (when (<= (gnus-group-level group) gnus-agent-handle-level)
888 (gnus-agent-fetch-group-1 group gnus-command-method)))))
890 (gnus-message 6 "Finished fetching articles into the Gnus agent"))))
892 (defun gnus-agent-fetch-group-1 (group method)
894 (let ((gnus-command-method method)
895 gnus-newsgroup-dependencies gnus-newsgroup-headers
896 gnus-newsgroup-scored gnus-headers gnus-score
897 gnus-use-cache articles arts
898 category predicate info marks score-param)
900 (when (and (or (gnus-active group) (gnus-activate-group group))
901 (setq articles (gnus-agent-fetch-headers group)))
902 ;; Parse them and see which articles we want to fetch.
903 (setq gnus-newsgroup-dependencies
904 (make-vector (length articles) 0))
905 (setq gnus-newsgroup-headers
906 (gnus-get-newsgroup-headers-xover articles nil nil group))
907 (setq category (gnus-group-category group))
910 (or (gnus-group-get-parameter group 'agent-predicate)
913 (or (gnus-group-get-parameter group 'agent-score)
916 (gnus-score-headers (list (list score-param))))
918 (while (setq gnus-headers (pop gnus-newsgroup-headers))
920 (or (cdr (assq (mail-header-number gnus-headers)
921 gnus-newsgroup-scored))
922 gnus-summary-default-score))
923 (when (funcall predicate)
924 (push (mail-header-number gnus-headers)
926 ;; Fetch the articles.
928 (gnus-agent-fetch-articles group arts)))
929 ;; Perhaps we have some additional articles to fetch.
930 (setq arts (assq 'download (gnus-info-marks
931 (setq info (gnus-get-info group)))))
933 (gnus-agent-fetch-articles
934 group (gnus-uncompress-range (cdr arts)))
935 (setq marks (delq arts (gnus-info-marks info)))
936 (gnus-info-set-marks info marks))))
939 ;;; Agent Category Mode
942 (defvar gnus-category-mode-hook nil
943 "Hook run in `gnus-category-mode' buffers.")
945 (defvar gnus-category-line-format " %(%20c%): %g\n"
946 "Format of category lines.")
948 (defvar gnus-category-mode-line-format "Gnus: %%b"
949 "The format specification for the category mode line.")
951 (defvar gnus-agent-short-article 100
952 "Articles that have fewer lines than this are short.")
954 (defvar gnus-agent-long-article 200
955 "Articles that have more lines than this are long.")
957 (defvar gnus-agent-low-score 0
958 "Articles that have a score lower than this have a low score.")
960 (defvar gnus-agent-high-score 0
961 "Articles that have a score higher than this have a high score.")
964 ;;; Internal variables.
966 (defvar gnus-category-buffer "*Agent Category*")
968 (defvar gnus-category-line-format-alist
969 `((?c gnus-tmp-name ?s)
970 (?g gnus-tmp-groups ?d)))
972 (defvar gnus-category-mode-line-format-alist
973 `((?u user-defined ?s)))
975 (defvar gnus-category-line-format-spec nil)
976 (defvar gnus-category-mode-line-format-spec nil)
978 (defvar gnus-category-mode-map nil)
979 (put 'gnus-category-mode 'mode-class 'special)
981 (unless gnus-category-mode-map
982 (setq gnus-category-mode-map (make-sparse-keymap))
983 (suppress-keymap gnus-category-mode-map)
985 (gnus-define-keys gnus-category-mode-map
986 "q" gnus-category-exit
987 "k" gnus-category-kill
988 "c" gnus-category-copy
989 "a" gnus-category-add
990 "p" gnus-category-edit-predicate
991 "g" gnus-category-edit-groups
992 "s" gnus-category-edit-score
993 "l" gnus-category-list
995 "\C-c\C-i" gnus-info-find-node
996 "\C-c\C-b" gnus-bug))
998 (defvar gnus-category-menu-hook nil
999 "*Hook run after the creation of the menu.")
1001 (defun gnus-category-make-menu-bar ()
1002 (gnus-turn-off-edit-menu 'category)
1003 (unless (boundp 'gnus-category-menu)
1005 gnus-category-menu gnus-category-mode-map ""
1007 ["Add" gnus-category-add t]
1008 ["Kill" gnus-category-kill t]
1009 ["Copy" gnus-category-copy t]
1010 ["Edit predicate" gnus-category-edit-predicate t]
1011 ["Edit score" gnus-category-edit-score t]
1012 ["Edit groups" gnus-category-edit-groups t]
1013 ["Exit" gnus-category-exit t]))
1015 (gnus-run-hooks 'gnus-category-menu-hook)))
1017 (defun gnus-category-mode ()
1018 "Major mode for listing and editing agent categories.
1020 All normal editing commands are switched off.
1021 \\<gnus-category-mode-map>
1022 For more in-depth information on this mode, read the manual
1023 (`\\[gnus-info-find-node]').
1025 The following commands are available:
1027 \\{gnus-category-mode-map}"
1029 (when (gnus-visual-p 'category-menu 'menu)
1030 (gnus-category-make-menu-bar))
1031 (kill-all-local-variables)
1032 (gnus-simplify-mode-line)
1033 (setq major-mode 'gnus-category-mode)
1034 (setq mode-name "Category")
1035 (gnus-set-default-directory)
1036 (setq mode-line-process nil)
1037 (use-local-map gnus-category-mode-map)
1038 (buffer-disable-undo (current-buffer))
1039 (setq truncate-lines t)
1040 (setq buffer-read-only t)
1041 (gnus-run-hooks 'gnus-category-mode-hook))
1043 (defalias 'gnus-category-position-point 'gnus-goto-colon)
1045 (defun gnus-category-insert-line (category)
1046 (let* ((gnus-tmp-name (car category))
1047 (gnus-tmp-groups (length (cadddr category))))
1049 (gnus-add-text-properties
1053 (eval gnus-category-line-format-spec))
1054 (list 'gnus-category gnus-tmp-name))))
1056 (defun gnus-enter-category-buffer ()
1057 "Go to the Category buffer."
1059 (gnus-category-setup-buffer)
1060 (gnus-configure-windows 'category)
1061 (gnus-category-prepare))
1063 (defun gnus-category-setup-buffer ()
1064 (unless (get-buffer gnus-category-buffer)
1066 (set-buffer (gnus-get-buffer-create gnus-category-buffer))
1067 (gnus-category-mode))))
1069 (defun gnus-category-prepare ()
1070 (gnus-set-format 'category-mode)
1071 (gnus-set-format 'category t)
1072 (let ((alist gnus-category-alist)
1073 (buffer-read-only nil))
1076 (gnus-category-insert-line (pop alist)))
1077 (goto-char (point-min))
1078 (gnus-category-position-point)))
1080 (defun gnus-category-name ()
1081 (or (get-text-property (gnus-point-at-bol) 'gnus-category)
1082 (error "No category on the current line")))
1084 (defun gnus-category-read ()
1085 "Read the category alist."
1086 (setq gnus-category-alist
1087 (or (gnus-agent-read-file
1088 (nnheader-concat gnus-agent-directory "lib/categories"))
1089 (list (list 'default 'short nil nil)))))
1091 (defun gnus-category-write ()
1092 "Write the category alist."
1093 (setq gnus-category-predicate-cache nil
1094 gnus-category-group-cache nil)
1095 (nnheader-temp-write (nnheader-concat gnus-agent-directory "lib/categories")
1096 (prin1 gnus-category-alist (current-buffer))))
1098 (defun gnus-category-edit-predicate (category)
1099 "Edit the predicate for CATEGORY."
1100 (interactive (list (gnus-category-name)))
1101 (let ((info (assq category gnus-category-alist)))
1103 (cadr info) (format "Editing the predicate for category %s" category)
1104 `(lambda (predicate)
1105 (setf (cadr (assq ',category gnus-category-alist)) predicate)
1106 (gnus-category-write)
1107 (gnus-category-list)))))
1109 (defun gnus-category-edit-score (category)
1110 "Edit the score expression for CATEGORY."
1111 (interactive (list (gnus-category-name)))
1112 (let ((info (assq category gnus-category-alist)))
1115 (format "Editing the score expression for category %s" category)
1117 (setf (caddr (assq ',category gnus-category-alist)) groups)
1118 (gnus-category-write)
1119 (gnus-category-list)))))
1121 (defun gnus-category-edit-groups (category)
1122 "Edit the group list for CATEGORY."
1123 (interactive (list (gnus-category-name)))
1124 (let ((info (assq category gnus-category-alist)))
1126 (cadddr info) (format "Editing the group list for category %s" category)
1128 (setf (cadddr (assq ',category gnus-category-alist)) groups)
1129 (gnus-category-write)
1130 (gnus-category-list)))))
1132 (defun gnus-category-kill (category)
1133 "Kill the current category."
1134 (interactive (list (gnus-category-name)))
1135 (let ((info (assq category gnus-category-alist))
1136 (buffer-read-only nil))
1138 (gnus-category-write)
1139 (setq gnus-category-alist (delq info gnus-category-alist))))
1141 (defun gnus-category-copy (category to)
1142 "Copy the current category."
1143 (interactive (list (gnus-category-name) (intern (read-string "New name: "))))
1144 (let ((info (assq category gnus-category-alist)))
1145 (push (list to (gnus-copy-sequence (cadr info))
1146 (gnus-copy-sequence (caddr info)) nil)
1147 gnus-category-alist)
1148 (gnus-category-write)
1149 (gnus-category-list)))
1151 (defun gnus-category-add (category)
1152 "Create a new category."
1153 (interactive "SCategory name: ")
1154 (when (assq category gnus-category-alist)
1155 (error "Category %s already exists" category))
1156 (push (list category 'true nil nil)
1157 gnus-category-alist)
1158 (gnus-category-write)
1159 (gnus-category-list))
1161 (defun gnus-category-list ()
1162 "List all categories."
1164 (gnus-category-prepare))
1166 (defun gnus-category-exit ()
1167 "Return to the group buffer."
1169 (kill-buffer (current-buffer))
1170 (gnus-configure-windows 'group t))
1172 ;; To avoid having 8-bit characters in the source file.
1173 (defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))
1175 (defvar gnus-category-predicate-alist
1176 '((spam . gnus-agent-spam-p)
1177 (short . gnus-agent-short-p)
1178 (long . gnus-agent-long-p)
1179 (low . gnus-agent-low-scored-p)
1180 (high . gnus-agent-high-scored-p)
1181 (true . gnus-agent-true)
1182 (false . gnus-agent-false))
1183 "Mapping from short score predicate symbols to predicate functions.")
1185 (defun gnus-agent-spam-p ()
1186 "Say whether an article is spam or not."
1187 (unless gnus-agent-spam-hashtb
1188 (setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
1189 (if (not (equal (mail-header-references gnus-headers) ""))
1191 (let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
1193 (gnus-gethash string gnus-agent-spam-hashtb)
1194 (gnus-sethash string t gnus-agent-spam-hashtb)))))
1196 (defun gnus-agent-short-p ()
1197 "Say whether an article is short or not."
1198 (< (mail-header-lines gnus-headers) gnus-agent-short-article))
1200 (defun gnus-agent-long-p ()
1201 "Say whether an article is long or not."
1202 (> (mail-header-lines gnus-headers) gnus-agent-long-article))
1204 (defun gnus-agent-low-scored-p ()
1205 "Say whether an article has a low score or not."
1206 (< gnus-score gnus-agent-low-score))
1208 (defun gnus-agent-high-scored-p ()
1209 "Say whether an article has a high score or not."
1210 (> gnus-score gnus-agent-high-score))
1212 (defun gnus-category-make-function (cat)
1213 "Make a function from category CAT."
1214 `(lambda () ,(gnus-category-make-function-1 cat)))
1216 (defun gnus-agent-true ()
1220 (defun gnus-agent-false ()
1224 (defun gnus-category-make-function-1 (cat)
1225 "Make a function from category CAT."
1227 ;; Functions are just returned as is.
1229 (gnus-functionp cat))
1230 `(,(or (cdr (assq cat gnus-category-predicate-alist))
1232 ;; More complex category.
1235 ((memq (car cat) '(& and))
1237 ((memq (car cat) '(| or))
1239 ((memq (car cat) gnus-category-not)
1241 ,@(mapcar 'gnus-category-make-function-1 (cdr cat))))
1243 (error "Unknown category type: %s" cat))))
1245 (defun gnus-get-predicate (predicate)
1246 "Return the predicate for CATEGORY."
1247 (or (cdr (assoc predicate gnus-category-predicate-cache))
1248 (cdar (push (cons predicate
1249 (gnus-category-make-function predicate))
1250 gnus-category-predicate-cache))))
1252 (defun gnus-group-category (group)
1253 "Return the category GROUP belongs to."
1254 (unless gnus-category-group-cache
1255 (setq gnus-category-group-cache (gnus-make-hashtable 1000))
1256 (let ((cs gnus-category-alist)
1258 (while (setq cat (pop cs))
1259 (setq groups (cadddr cat))
1261 (gnus-sethash (pop groups) cat gnus-category-group-cache)))))
1262 (or (gnus-gethash group gnus-category-group-cache)
1263 (assq 'default gnus-category-alist)))
1265 (defun gnus-agent-expire ()
1266 "Expire all old articles."
1268 (let ((methods gnus-agent-covered-methods)
1269 (day (- (gnus-time-to-day (current-time)) gnus-agent-expire-days))
1270 gnus-command-method sym group articles
1271 history overview file histories elem art nov-file low info
1272 unreads marked article)
1274 (setq overview (gnus-get-buffer-create " *expire overview*"))
1275 (while (setq gnus-command-method (pop methods))
1276 (let ((expiry-hashtb (gnus-make-hashtable 1023)))
1277 (gnus-agent-open-history)
1279 (setq gnus-agent-current-history
1280 (setq history (gnus-agent-history-buffer))))
1281 (goto-char (point-min))
1282 (when (> (buffer-size) 1)
1283 (goto-char (point-min))
1285 (skip-chars-forward "^\t")
1286 (if (> (read (current-buffer)) day)
1287 ;; New article; we don't expire it.
1289 ;; Old article. Schedule it for possible nuking.
1291 (setq sym (let ((obarray expiry-hashtb))
1292 (read (current-buffer))))
1294 (set sym (cons (cons (read (current-buffer)) (point))
1295 (symbol-value sym)))
1296 (set sym (list (cons (read (current-buffer)) (point)))))
1297 (skip-chars-forward " "))
1299 ;; We now have all articles that can possibly be expired.
1302 (setq group (symbol-name sym)
1303 articles (sort (symbol-value sym) 'car-less-than-car)
1304 low (car (gnus-active group))
1305 info (gnus-get-info group)
1306 unreads (ignore-errors (gnus-list-of-unread-articles group))
1307 marked (nconc (gnus-uncompress-range
1308 (cdr (assq 'tick (gnus-info-marks info))))
1309 (gnus-uncompress-range
1311 (gnus-info-marks info)))))
1312 nov-file (gnus-agent-article-name ".overview" group))
1313 (gnus-agent-load-alist group)
1314 (gnus-message 5 "Expiring articles in %s" group)
1315 (set-buffer overview)
1317 (when (file-exists-p nov-file)
1318 (nnheader-insert-file-contents nov-file))
1319 (goto-char (point-min))
1321 (while (setq elem (pop articles))
1322 (setq article (car elem))
1323 (when (or (null low)
1325 gnus-agent-expire-all
1326 (and (not (memq article unreads))
1327 (not (memq article marked))))
1328 ;; Find and nuke the NOV line.
1329 (while (and (not (eobp))
1331 (setq art (read (current-buffer)))))
1334 (gnus-agent-article-name
1335 (number-to-string art) group))
1337 ;; Remove old NOV lines that have no articles.
1338 (gnus-delete-line)))
1343 ;; Nuke the article.
1344 (when (file-exists-p (setq file (gnus-agent-article-name
1345 (number-to-string article)
1348 ;; Schedule the history line for nuking.
1349 (push (cdr elem) histories)))
1350 (gnus-make-directory (file-name-directory nov-file))
1351 (write-region-as-coding-system
1352 gnus-agent-file-coding-system
1353 (point-min) (point-max) nov-file nil 'silent)
1354 ;; Delete the unwanted entries in the alist.
1355 (setq gnus-agent-article-alist
1356 (sort gnus-agent-article-alist 'car-less-than-car))
1357 (let* ((alist gnus-agent-article-alist)
1358 (prev (cons nil alist))
1362 (<= (caar alist) article))
1363 (if (or (not (cdar alist))
1365 (gnus-agent-article-name
1370 (push (caar alist) expired)
1371 (setcdr prev (setq alist (cdr alist))))
1373 alist (cdr alist))))
1374 (setq gnus-agent-article-alist (cdr first))
1375 ;;; Mark all articles up to the first article
1376 ;;; in `gnus-article-alist' as read.
1377 (when (and info (caar gnus-agent-article-alist))
1378 (setcar (nthcdr 2 info)
1381 (cons 1 (- (caar gnus-agent-article-alist) 1)))))
1382 ;; Maybe everything has been expired from `gnus-article-alist'
1383 ;; and so the above marking as read could not be conducted,
1384 ;; or there are expired article within the range of the alist.
1385 (when (and (car expired)
1386 (or (not (caar gnus-agent-article-alist))
1388 (caar gnus-agent-article-alist))) )
1389 (setcar (nthcdr 2 info)
1392 (nreverse expired))))
1394 (concat "(gnus-group-set-info '"
1395 (gnus-prin1-to-string info)
1398 (set-buffer history)
1399 (setq histories (nreverse (sort histories '<)))
1401 (goto-char (pop histories))
1403 (gnus-agent-save-history)
1404 (gnus-agent-close-history))
1405 (gnus-message 4 "Expiry...done"))))))
1408 (defun gnus-agent-batch ()
1410 (let ((init-file-user "")
1411 (gnus-always-read-dribble-file t))
1413 (gnus-group-send-drafts)
1414 (gnus-agent-fetch-session))
1416 (provide 'gnus-agent)
1418 ;;; gnus-agent.el ends here