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 (if (featurep 'xemacs)
37 (defcustom gnus-agent-directory (nnheader-concat gnus-directory "agent/")
38 "Where the Gnus agent will store its files."
42 (defcustom gnus-agent-plugged-hook nil
43 "Hook run when plugging into the network."
47 (defcustom gnus-agent-unplugged-hook nil
48 "Hook run when unplugging from the network."
52 (defcustom gnus-agent-handle-level gnus-level-subscribed
53 "Groups on levels higher than this variable will be ignored by the Agent."
57 (defcustom gnus-agent-expire-days 7
58 "Read articles older than this will be expired."
62 (defcustom gnus-agent-expire-all nil
63 "If non-nil, also expire unread, ticked and dormant articles.
64 If nil, only read articles will be expired."
68 (defcustom gnus-agent-group-mode-hook nil
69 "Hook run in Agent group minor modes."
73 (defcustom gnus-agent-summary-mode-hook nil
74 "Hook run in Agent summary minor modes."
78 (defcustom gnus-agent-server-mode-hook nil
79 "Hook run in Agent summary minor modes."
83 (defcustom gnus-agent-confirmation-function 'y-or-n-p
84 "Function to confirm when error happens."
89 (defcustom gnus-agent-synchronize-flags 'ask
90 "Indicate if flags are synchronized when you plug in.
91 If this is `ask' the hook will query the user."
93 :type '(choice (const :tag "Always" t)
94 (const :tag "Never" nil)
95 (const :tag "Ask" ask))
98 ;;; Internal variables
100 (defvar gnus-agent-history-buffers nil)
101 (defvar gnus-agent-buffer-alist nil)
102 (defvar gnus-agent-article-alist nil)
103 (defvar gnus-agent-group-alist nil)
104 (defvar gnus-agent-covered-methods nil)
105 (defvar gnus-category-alist nil)
106 (defvar gnus-agent-current-history nil)
107 (defvar gnus-agent-overview-buffer nil)
108 (defvar gnus-category-predicate-cache nil)
109 (defvar gnus-category-group-cache nil)
110 (defvar gnus-agent-spam-hashtb nil)
111 (defvar gnus-agent-file-name nil)
112 (defvar gnus-agent-send-mail-function nil)
113 (defvar gnus-agent-file-coding-system 'raw-text)
116 (defvar gnus-headers)
123 (defun gnus-open-agent ()
125 (gnus-agent-read-servers)
127 (gnus-agent-create-buffer)
128 (add-hook 'gnus-group-mode-hook 'gnus-agent-mode)
129 (add-hook 'gnus-summary-mode-hook 'gnus-agent-mode)
130 (add-hook 'gnus-server-mode-hook 'gnus-agent-mode))
132 (defun gnus-agent-create-buffer ()
133 (if (gnus-buffer-live-p gnus-agent-overview-buffer)
135 (setq gnus-agent-overview-buffer
136 (gnus-get-buffer-create " *Gnus agent overview*"))
137 (with-current-buffer gnus-agent-overview-buffer
138 (mm-enable-multibyte))
141 (gnus-add-shutdown 'gnus-close-agent 'gnus)
143 (defun gnus-close-agent ()
144 (setq gnus-agent-covered-methods nil
145 gnus-category-predicate-cache nil
146 gnus-category-group-cache nil
147 gnus-agent-spam-hashtb nil)
148 (gnus-kill-buffer gnus-agent-overview-buffer))
151 ;;; Utility functions
154 (defun gnus-agent-read-file (file)
155 "Load FILE and do a `read' there."
158 (nnheader-insert-file-contents file)
159 (goto-char (point-min))
160 (read (current-buffer)))))
162 (defsubst gnus-agent-method ()
163 (concat (symbol-name (car gnus-command-method)) "/"
164 (if (equal (cadr gnus-command-method) "")
166 (cadr gnus-command-method))))
168 (defsubst gnus-agent-directory ()
169 "Path of the Gnus agent directory."
170 (nnheader-concat gnus-agent-directory
171 (nnheader-translate-file-chars (gnus-agent-method)) "/"))
173 (defun gnus-agent-lib-file (file)
174 "The full path of the Gnus agent library FILE."
175 (expand-file-name file
176 (file-name-as-directory
177 (expand-file-name "agent.lib" (gnus-agent-directory)))))
179 ;;; Fetching setup functions.
181 (defun gnus-agent-start-fetch ()
182 "Initialize data structures for efficient fetching."
183 (gnus-agent-open-history)
184 (setq gnus-agent-current-history (gnus-agent-history-buffer))
185 (gnus-agent-create-buffer))
187 (defun gnus-agent-stop-fetch ()
188 "Save all data structures and clean up."
189 (gnus-agent-save-history)
190 (gnus-agent-close-history)
191 (setq gnus-agent-spam-hashtb nil)
193 (set-buffer nntp-server-buffer)
196 (defmacro gnus-agent-with-fetch (&rest forms)
199 (let ((gnus-agent-fetching t))
200 (gnus-agent-start-fetch)
202 (gnus-agent-stop-fetch)))
204 (put 'gnus-agent-with-fetch 'lisp-indent-function 0)
205 (put 'gnus-agent-with-fetch 'edebug-form-spec '(body))
211 (defvar gnus-agent-mode-hook nil
212 "Hook run when installing agent mode.")
214 (defvar gnus-agent-mode nil)
215 (defvar gnus-agent-mode-status '(gnus-agent-mode " Plugged"))
217 (defun gnus-agent-mode ()
218 "Minor mode for providing a agent support in Gnus buffers."
219 (let* ((buffer (progn (string-match "^gnus-\\(.*\\)-mode$"
220 (symbol-name major-mode))
221 (match-string 1 (symbol-name major-mode))))
222 (mode (intern (format "gnus-agent-%s-mode" buffer))))
223 (set (make-local-variable 'gnus-agent-mode) t)
225 (set (make-local-variable mode) t)
227 (when (gnus-visual-p 'agent-menu 'menu)
228 (funcall (intern (format "gnus-agent-%s-make-menu-bar" buffer))))
229 (unless (assq 'gnus-agent-mode minor-mode-alist)
230 (push gnus-agent-mode-status minor-mode-alist))
231 (unless (assq mode minor-mode-map-alist)
232 (push (cons mode (symbol-value (intern (format "gnus-agent-%s-mode-map"
234 minor-mode-map-alist))
235 (when (eq major-mode 'gnus-group-mode)
236 (gnus-agent-toggle-plugged gnus-plugged))
237 (gnus-run-hooks 'gnus-agent-mode-hook
238 (intern (format "gnus-agent-%s-mode-hook" buffer)))))
240 (defvar gnus-agent-group-mode-map (make-sparse-keymap))
241 (gnus-define-keys gnus-agent-group-mode-map
242 "Ju" gnus-agent-fetch-groups
243 "Jc" gnus-enter-category-buffer
244 "Jj" gnus-agent-toggle-plugged
245 "Js" gnus-agent-fetch-session
246 "JY" gnus-agent-synchronize-flags
247 "JS" gnus-group-send-drafts
248 "Ja" gnus-agent-add-group
249 "Jr" gnus-agent-remove-group)
251 (defun gnus-agent-group-make-menu-bar ()
252 (unless (boundp 'gnus-agent-group-menu)
254 gnus-agent-group-menu gnus-agent-group-mode-map ""
256 ["Toggle plugged" gnus-agent-toggle-plugged t]
257 ["List categories" gnus-enter-category-buffer t]
258 ["Send drafts" gnus-group-send-drafts gnus-plugged]
260 ["All" gnus-agent-fetch-session gnus-plugged]
261 ["Group" gnus-agent-fetch-group gnus-plugged])))))
263 (defvar gnus-agent-summary-mode-map (make-sparse-keymap))
264 (gnus-define-keys gnus-agent-summary-mode-map
265 "Jj" gnus-agent-toggle-plugged
266 "J#" gnus-agent-mark-article
267 "J\M-#" gnus-agent-unmark-article
268 "@" gnus-agent-toggle-mark
269 "Jc" gnus-agent-catchup)
271 (defun gnus-agent-summary-make-menu-bar ()
272 (unless (boundp 'gnus-agent-summary-menu)
274 gnus-agent-summary-menu gnus-agent-summary-mode-map ""
276 ["Toggle plugged" gnus-agent-toggle-plugged t]
277 ["Mark as downloadable" gnus-agent-mark-article t]
278 ["Unmark as downloadable" gnus-agent-unmark-article t]
279 ["Toggle mark" gnus-agent-toggle-mark t]
280 ["Catchup undownloaded" gnus-agent-catchup t]))))
282 (defvar gnus-agent-server-mode-map (make-sparse-keymap))
283 (gnus-define-keys gnus-agent-server-mode-map
284 "Jj" gnus-agent-toggle-plugged
285 "Ja" gnus-agent-add-server
286 "Jr" gnus-agent-remove-server)
288 (defun gnus-agent-server-make-menu-bar ()
289 (unless (boundp 'gnus-agent-server-menu)
291 gnus-agent-server-menu gnus-agent-server-mode-map ""
293 ["Toggle plugged" gnus-agent-toggle-plugged t]
294 ["Add" gnus-agent-add-server t]
295 ["Remove" gnus-agent-remove-server t]))))
297 (defun gnus-agent-toggle-plugged (plugged)
298 "Toggle whether Gnus is unplugged or not."
299 (interactive (list (not gnus-plugged)))
302 (setq gnus-plugged plugged)
303 (gnus-agent-possibly-synchronize-flags)
304 (gnus-run-hooks 'gnus-agent-plugged-hook)
305 (setcar (cdr gnus-agent-mode-status) " Plugged"))
306 (gnus-agent-close-connections)
307 (setq gnus-plugged plugged)
308 (gnus-run-hooks 'gnus-agent-unplugged-hook)
309 (setcar (cdr gnus-agent-mode-status) " Unplugged"))
310 (set-buffer-modified-p t))
312 (defun gnus-agent-close-connections ()
313 "Close all methods covered by the Gnus agent."
314 (let ((methods gnus-agent-covered-methods))
316 (gnus-close-server (pop methods)))))
319 (defun gnus-unplugged ()
320 "Start Gnus unplugged."
322 (setq gnus-plugged nil)
326 (defun gnus-plugged ()
327 "Start Gnus plugged."
329 (setq gnus-plugged t)
333 (defun gnus-agentize ()
334 "Allow Gnus to be an offline newsreader.
335 The normal usage of this command is to put the following as the
336 last form in your `.gnus.el' file:
340 This will modify the `gnus-before-startup-hook', `gnus-post-method',
341 and `message-send-mail-function' variables, and install the Gnus
342 agent minor mode in all Gnus buffers."
345 (add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
346 (unless gnus-agent-send-mail-function
347 (setq gnus-agent-send-mail-function message-send-mail-function
348 message-send-mail-function 'gnus-agent-send-mail))
349 (unless gnus-agent-covered-methods
350 (setq gnus-agent-covered-methods (list gnus-select-method))))
352 (defun gnus-agent-queue-setup ()
353 "Make sure the queue group exists."
354 (unless (gnus-gethash "nndraft:queue" gnus-newsrc-hashtb)
355 (gnus-request-create-group "queue" '(nndraft ""))
356 (let ((gnus-level-default-subscribed 1))
357 (gnus-subscribe-group "nndraft:queue" nil '(nndraft "")))
358 (gnus-group-set-parameter
359 "nndraft:queue" 'gnus-dummy '((gnus-draft-mode)))))
361 (defun gnus-agent-send-mail ()
363 (funcall gnus-agent-send-mail-function)
364 (goto-char (point-min))
366 (concat "^" (regexp-quote mail-header-separator) "\n"))
368 (gnus-agent-insert-meta-information 'mail)
369 (gnus-request-accept-article "nndraft:queue" nil t t)))
371 (defun gnus-agent-insert-meta-information (type &optional method)
372 "Insert meta-information into the message that says how it's to be posted.
373 TYPE can be either `mail' or `news'. If the latter METHOD can
376 (message-remove-header gnus-agent-meta-information-header)
377 (goto-char (point-min))
378 (insert gnus-agent-meta-information-header ": "
379 (symbol-name type) " " (format "%S" method)
382 (while (search-backward "\n" nil t)
383 (replace-match "\\n" t t))))
385 (defun gnus-agent-restore-gcc ()
386 "Restore GCC field from saved header."
388 (goto-char (point-min))
389 (while (re-search-forward (concat gnus-agent-gcc-header ":") nil t)
390 (replace-match "Gcc:" 'fixedcase))))
392 (defun gnus-agent-any-covered-gcc ()
394 (message-narrow-to-headers)
395 (let* ((gcc (mail-fetch-field "gcc" nil t))
397 (mapcar 'gnus-inews-group-method
398 (message-unquote-tokens
399 (message-tokenize-header
402 (while (and (not covered) methods)
404 (member (car methods) gnus-agent-covered-methods)
405 methods (cdr methods)))
408 (defun gnus-agent-possibly-save-gcc ()
409 "Save GCC if Gnus is unplugged."
410 (when (and (not gnus-plugged) (gnus-agent-any-covered-gcc))
412 (goto-char (point-min))
413 (let ((case-fold-search t))
414 (while (re-search-forward "^gcc:" nil t)
415 (replace-match (concat gnus-agent-gcc-header ":") 'fixedcase))))))
417 (defun gnus-agent-possibly-do-gcc ()
418 "Do GCC if Gnus is plugged."
419 (when (or gnus-plugged (not (gnus-agent-any-covered-gcc)))
420 (gnus-inews-do-gcc)))
423 ;;; Group mode commands
426 (defun gnus-agent-fetch-groups (n)
427 "Put all new articles in the current groups into the Agent."
430 (error "Groups can't be fetched when Gnus is unplugged"))
431 (gnus-group-iterate n 'gnus-agent-fetch-group))
433 (defun gnus-agent-fetch-group (group)
434 "Put all new articles in GROUP into the Agent."
435 (interactive (list (gnus-group-group-name)))
437 (error "Groups can't be fetched when Gnus is unplugged"))
439 (error "No group on the current line"))
440 (let ((gnus-command-method (gnus-find-method-for-group group)))
441 (gnus-agent-with-fetch
442 (gnus-agent-fetch-group-1 group gnus-command-method)
443 (gnus-message 5 "Fetching %s...done" group))))
445 (defun gnus-agent-add-group (category arg)
446 "Add the current group to an agent category."
452 (mapcar (lambda (cat) (list (symbol-name (car cat))))
456 (let ((cat (assq category gnus-category-alist))
458 (gnus-group-iterate arg
460 (when (cadddr (setq c (gnus-group-category group)))
461 (setf (cadddr c) (delete group (cadddr c))))
462 (push group groups)))
463 (setf (cadddr cat) (nconc (cadddr cat) groups))
464 (gnus-category-write)))
466 (defun gnus-agent-remove-group (arg)
467 "Remove the current group from its agent category, if any."
470 (gnus-group-iterate arg
472 (when (cadddr (setq c (gnus-group-category group)))
473 (setf (cadddr c) (delete group (cadddr c))))))
474 (gnus-category-write)))
476 (defun gnus-agent-synchronize-flags ()
477 "Synchronize unplugged flags with servers."
480 (dolist (gnus-command-method gnus-agent-covered-methods)
481 (when (file-exists-p (gnus-agent-lib-file "flags"))
482 (gnus-agent-synchronize-flags-server gnus-command-method)))))
484 (defun gnus-agent-possibly-synchronize-flags ()
485 "Synchronize flags according to `gnus-agent-synchronize-flags'."
488 (dolist (gnus-command-method gnus-agent-covered-methods)
489 (when (file-exists-p (gnus-agent-lib-file "flags"))
490 (gnus-agent-possibly-synchronize-flags-server gnus-command-method)))))
492 (defun gnus-agent-synchronize-flags-server (method)
493 "Synchronize flags set when unplugged for server."
494 (let ((gnus-command-method method))
495 (when (file-exists-p (gnus-agent-lib-file "flags"))
496 (set-buffer (get-buffer-create " *Gnus Agent flag synchronize*"))
498 (nnheader-insert-file-contents (gnus-agent-lib-file "flags"))
499 (if (null (gnus-check-server gnus-command-method))
500 (message "Couldn't open server %s" (nth 1 gnus-command-method))
502 (if (null (eval (read (current-buffer))))
503 (progn (forward-line)
505 (write-file (gnus-agent-lib-file "flags"))
506 (error "Couldn't set flags from file %s"
507 (gnus-agent-lib-file "flags"))))
508 (delete-file (gnus-agent-lib-file "flags")))
511 (defun gnus-agent-possibly-synchronize-flags-server (method)
512 "Synchronize flags for server according to `gnus-agent-synchronize-flags'."
513 (when (or (and gnus-agent-synchronize-flags
514 (not (eq gnus-agent-synchronize-flags 'ask)))
515 (and (eq gnus-agent-synchronize-flags 'ask)
516 (gnus-y-or-n-p (format "Synchronize flags on server `%s'? "
518 (gnus-agent-synchronize-flags-server method)))
521 ;;; Server mode commands
524 (defun gnus-agent-add-server (server)
525 "Enroll SERVER in the agent program."
526 (interactive (list (gnus-server-server-name)))
528 (error "No server on the current line"))
529 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
530 (when (member method gnus-agent-covered-methods)
531 (error "Server already in the agent program"))
532 (push method gnus-agent-covered-methods)
533 (gnus-agent-write-servers)
534 (message "Entered %s into the Agent" server)))
536 (defun gnus-agent-remove-server (server)
537 "Remove SERVER from the agent program."
538 (interactive (list (gnus-server-server-name)))
540 (error "No server on the current line"))
541 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
542 (unless (member method gnus-agent-covered-methods)
543 (error "Server not in the agent program"))
544 (setq gnus-agent-covered-methods
545 (delete method gnus-agent-covered-methods))
546 (gnus-agent-write-servers)
547 (message "Removed %s from the agent" server)))
549 (defun gnus-agent-read-servers ()
550 "Read the alist of covered servers."
551 (setq gnus-agent-covered-methods
552 (gnus-agent-read-file
553 (nnheader-concat gnus-agent-directory "lib/servers"))))
555 (defun gnus-agent-write-servers ()
556 "Write the alist of covered servers."
557 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
558 (let ((coding-system-for-write nnheader-file-coding-system)
559 (file-name-coding-system nnmail-pathname-coding-system))
560 (with-temp-file (nnheader-concat gnus-agent-directory "lib/servers")
561 (prin1 gnus-agent-covered-methods (current-buffer)))))
567 (defun gnus-agent-mark-article (n &optional unmark)
568 "Mark the next N articles as downloadable.
569 If N is negative, mark backward instead. If UNMARK is non-nil, remove
570 the mark instead. The difference between N and the actual number of
571 articles marked is returned."
573 (let ((backward (< n 0))
578 (gnus-summary-set-agent-mark
579 (gnus-summary-article-number) unmark)
580 (zerop (gnus-summary-next-subject (if backward -1 1) nil t))))
583 (gnus-message 7 "No more articles"))
584 (gnus-summary-recenter)
585 (gnus-summary-position-point)
588 (defun gnus-agent-unmark-article (n)
589 "Remove the downloadable mark from the next N articles.
590 If N is negative, unmark backward instead. The difference between N and
591 the actual number of articles unmarked is returned."
593 (gnus-agent-mark-article n t))
595 (defun gnus-agent-toggle-mark (n)
596 "Toggle the downloadable mark from the next N articles.
597 If N is negative, toggle backward instead. The difference between N and
598 the actual number of articles toggled is returned."
600 (gnus-agent-mark-article n 'toggle))
602 (defun gnus-summary-set-agent-mark (article &optional unmark)
603 "Mark ARTICLE as downloadable."
604 (let ((unmark (if (and (not (null unmark)) (not (eq t unmark)))
605 (memq article gnus-newsgroup-downloadable)
609 (setq gnus-newsgroup-downloadable
610 (delq article gnus-newsgroup-downloadable))
611 (push article gnus-newsgroup-undownloaded))
612 (setq gnus-newsgroup-undownloaded
613 (delq article gnus-newsgroup-undownloaded))
614 (push article gnus-newsgroup-downloadable))
615 (gnus-summary-update-mark
616 (if unmark gnus-undownloaded-mark gnus-downloadable-mark)
619 (defun gnus-agent-get-undownloaded-list ()
620 "Mark all unfetched articles as read."
621 (let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
622 (when (and (not gnus-plugged)
623 (gnus-agent-method-p gnus-command-method))
624 (gnus-agent-load-alist gnus-newsgroup-name)
625 ;; First mark all undownloaded articles as undownloaded.
626 (let ((articles (append gnus-newsgroup-unreads
627 gnus-newsgroup-marked
628 gnus-newsgroup-dormant))
630 (while (setq article (pop articles))
631 (unless (or (cdr (assq article gnus-agent-article-alist))
632 (memq article gnus-newsgroup-downloadable)
633 (memq article gnus-newsgroup-cached))
634 (push article gnus-newsgroup-undownloaded))))
635 ;; Then mark downloaded downloadable as not-downloadable,
636 ;; if you get my drift.
637 (let ((articles gnus-newsgroup-downloadable)
639 (while (setq article (pop articles))
640 (when (cdr (assq article gnus-agent-article-alist))
641 (setq gnus-newsgroup-downloadable
642 (delq article gnus-newsgroup-downloadable))))))))
644 (defun gnus-agent-catchup ()
645 "Mark all undownloaded articles as read."
648 (while gnus-newsgroup-undownloaded
649 (gnus-summary-mark-article
650 (pop gnus-newsgroup-undownloaded) gnus-catchup-mark)))
651 (gnus-summary-position-point))
654 ;;; Internal functions
657 (defun gnus-agent-save-active (method)
658 (gnus-agent-save-active-1 method 'gnus-active-to-gnus-format))
660 (defun gnus-agent-save-active-1 (method function)
661 (when (gnus-agent-method-p method)
662 (let* ((gnus-command-method method)
663 (new (gnus-make-hashtable (count-lines (point-min) (point-max))))
664 (file (gnus-agent-lib-file "active")))
665 (funcall function nil new)
666 (gnus-agent-write-active file new)
668 (nnheader-insert-file-contents file))))
670 (defun gnus-agent-write-active (file new)
671 (let ((orig (gnus-make-hashtable (count-lines (point-min) (point-max))))
672 (file (gnus-agent-lib-file "active"))
674 (when (file-exists-p file)
676 (nnheader-insert-file-contents file)
677 (gnus-active-to-gnus-format nil orig))
680 (when (and sym (boundp sym))
681 (if (and (boundp (setq osym (intern (symbol-name sym) orig)))
682 (setq elem (symbol-value osym)))
683 (setcdr elem (cdr (symbol-value sym)))
684 (set (intern (symbol-name sym) orig) (symbol-value sym)))))
686 (gnus-make-directory (file-name-directory file))
687 (let ((coding-system-for-write gnus-agent-file-coding-system))
688 ;; The hashtable contains real names of groups, no more prefix
689 ;; removing, so set `full' to `t'.
690 (gnus-write-active-file file orig t))))
692 (defun gnus-agent-save-groups (method)
693 (gnus-agent-save-active-1 method 'gnus-groups-to-gnus-format))
695 (defun gnus-agent-save-group-info (method group active)
696 (when (gnus-agent-method-p method)
697 (let* ((gnus-command-method method)
698 (coding-system-for-write nnheader-file-coding-system)
699 (file-name-coding-system nnmail-pathname-coding-system)
700 (file (gnus-agent-lib-file "active"))
702 (gnus-make-directory (file-name-directory file))
704 ;; Emacs got problem to match non-ASCII group in multibyte buffer.
705 (mm-disable-multibyte)
706 (when (file-exists-p file)
707 (nnheader-insert-file-contents file))
708 (goto-char (point-min))
709 (when (re-search-forward
710 (concat "^" (regexp-quote group) " ") nil t)
713 (narrow-to-region (match-beginning 0)
717 (setq oactive (car (nnmail-parse-active)))))
719 (insert (format "%S %d %d y\n" (intern group)
721 (or (car oactive) (car active))))
722 (goto-char (point-max))
723 (while (search-backward "\\." nil t)
726 (defun gnus-agent-group-path (group)
727 "Translate GROUP into a path."
728 (if nnmail-use-long-file-names
729 (gnus-group-real-name group)
730 (nnheader-translate-file-chars
731 (nnheader-replace-chars-in-string
732 (nnheader-replace-duplicate-chars-in-string
733 (nnheader-replace-chars-in-string
734 (gnus-group-real-name group)
741 (defun gnus-agent-method-p (method)
742 "Say whether METHOD is covered by the agent."
743 (member method gnus-agent-covered-methods))
745 (defun gnus-agent-get-function (method)
746 (if (and (not gnus-plugged)
747 (gnus-agent-method-p method))
753 ;;; History functions
755 (defun gnus-agent-history-buffer ()
756 (cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))
758 (defun gnus-agent-open-history ()
760 (push (cons (gnus-agent-method)
761 (set-buffer (gnus-get-buffer-create
762 (format " *Gnus agent %s history*"
763 (gnus-agent-method)))))
764 gnus-agent-history-buffers)
765 (mm-disable-multibyte) ;; everything is binary
768 (let ((file (gnus-agent-lib-file "history")))
769 (when (file-exists-p file)
770 (nnheader-insert-file-contents file))
771 (set (make-local-variable 'gnus-agent-file-name) file))))
773 (defun gnus-agent-save-history ()
775 (set-buffer gnus-agent-current-history)
776 (gnus-make-directory (file-name-directory gnus-agent-file-name))
777 (let ((coding-system-for-write gnus-agent-file-coding-system))
778 (write-region (1+ (point-min)) (point-max)
779 gnus-agent-file-name nil 'silent))))
781 (defun gnus-agent-close-history ()
782 (when (gnus-buffer-live-p gnus-agent-current-history)
783 (kill-buffer gnus-agent-current-history)
784 (setq gnus-agent-history-buffers
785 (delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
786 gnus-agent-history-buffers))))
788 (defun gnus-agent-enter-history (id group-arts date)
790 (set-buffer gnus-agent-current-history)
791 (goto-char (point-max))
793 (insert id "\t" (number-to-string date) "\t")
795 (insert (format "%S" (intern (caar group-arts)))
796 " " (number-to-string (cdr (pop group-arts)))
799 (while (search-backward "\\." p t)
802 (defun gnus-agent-article-in-history-p (id)
804 (set-buffer (gnus-agent-history-buffer))
805 (goto-char (point-min))
806 (search-forward (concat "\n" id "\t") nil t)))
808 (defun gnus-agent-history-path (id)
810 (set-buffer (gnus-agent-history-buffer))
811 (goto-char (point-min))
812 (when (search-forward (concat "\n" id "\t") nil t)
813 (let ((method (gnus-agent-method)))
815 (while (not (numberp (setq group (read (current-buffer)))))
816 (push (concat method "/" group) paths))
817 (nreverse paths))))))
823 (defun gnus-agent-fetch-articles (group articles)
824 "Fetch ARTICLES from GROUP and put them into the Agent."
826 ;; Prune off articles that we have already fetched.
828 (cdr (assq (car articles) gnus-agent-article-alist)))
830 (let ((arts articles))
832 (if (cdr (assq (cadr arts) gnus-agent-article-alist))
833 (setcdr arts (cddr arts))
834 (setq arts (cdr arts)))))
837 (gnus-agent-directory)
838 (gnus-agent-group-path group) "/"))
839 (date (time-to-days (current-time)))
842 (gnus-make-directory dir)
843 (gnus-message 7 "Fetching articles for %s..." group)
844 ;; Fetch the articles from the backend.
845 (if (gnus-check-backend-function 'retrieve-articles group)
846 (setq pos (gnus-retrieve-articles articles group))
849 (while (setq article (pop articles))
851 (gnus-backlog-request-article group article
853 (gnus-request-article article group))
854 (goto-char (point-max))
855 (push (cons article (point)) pos)
856 (insert-buffer-substring nntp-server-buffer)))
857 (copy-to-buffer nntp-server-buffer (point-min) (point-max))
858 (setq pos (nreverse pos)))))
859 ;; Then save these articles into the Agent.
861 (set-buffer nntp-server-buffer)
863 (narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
864 (goto-char (point-min))
865 (when (search-forward "\n\n" nil t)
866 (when (search-backward "\nXrefs: " nil t)
867 ;; Handle crossposting.
868 (skip-chars-forward "^ ")
869 (skip-chars-forward " ")
871 (while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) +")
872 (push (cons (buffer-substring (match-beginning 1)
874 (buffer-substring (match-beginning 2)
877 (goto-char (match-end 0)))
878 (gnus-agent-crosspost crosses (caar pos))))
879 (goto-char (point-min))
880 (if (not (re-search-forward "^Message-ID: *<\\([^>\n]+\\)>" nil t))
881 (setq id "No-Message-ID-in-article")
882 (setq id (buffer-substring (match-beginning 1) (match-end 1))))
883 (let ((coding-system-for-write
884 gnus-agent-file-coding-system))
885 (write-region (point-min) (point-max)
886 (concat dir (number-to-string (caar pos)))
888 (when (setq elem (assq (caar pos) gnus-agent-article-alist))
890 (gnus-agent-enter-history
891 id (or crosses (list (cons group (caar pos)))) date)
894 (gnus-agent-save-alist group)))))
896 (defun gnus-agent-crosspost (crosses article)
897 (let (gnus-agent-article-alist group alist beg end)
899 (set-buffer gnus-agent-overview-buffer)
900 (when (nnheader-find-nov-line article)
903 (setq end (progn (forward-line 1) (point)))))
905 (setq group (caar crosses))
906 (unless (setq alist (assoc group gnus-agent-group-alist))
907 (push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
908 gnus-agent-group-alist))
909 (setcdr alist (cons (cons (cdar crosses) t) (cdr alist)))
911 (set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
913 (when (= (point-max) (point-min))
914 (push (cons group (current-buffer)) gnus-agent-buffer-alist)
916 (nnheader-insert-file-contents
917 (gnus-agent-article-name ".overview" group))))
918 (nnheader-find-nov-line (string-to-number (cdar crosses)))
919 (insert (string-to-number (cdar crosses)))
920 (insert-buffer-substring gnus-agent-overview-buffer beg end))
923 (defun gnus-agent-flush-cache ()
925 (while gnus-agent-buffer-alist
926 (set-buffer (cdar gnus-agent-buffer-alist))
927 (let ((coding-system-for-write
928 gnus-agent-file-coding-system))
929 (write-region (point-min) (point-max)
930 (gnus-agent-article-name ".overview"
931 (caar gnus-agent-buffer-alist))
933 (pop gnus-agent-buffer-alist))
934 (while gnus-agent-group-alist
935 (with-temp-file (caar gnus-agent-group-alist)
936 (princ (cdar gnus-agent-group-alist))
938 (pop gnus-agent-group-alist))))
941 (defalias 'gnus-agent-union 'union)
942 (defun gnus-agent-union (l1 l2)
943 "Set union of lists L1 and L2."
948 (or (>= (length l1) (length l2))
949 (setq l1 (prog1 l2 (setq l2 l1))))
951 (or (memq (car l2) l1)
956 (defun gnus-agent-fetch-headers (group &optional force)
957 (let ((articles (gnus-list-of-unread-articles group))
958 (gnus-decode-encoded-word-function 'identity)
959 (file (gnus-agent-article-name ".overview" group)))
960 ;; Add article with marks to list of article headers we want to fetch.
961 (dolist (arts (gnus-info-marks (gnus-get-info group)))
962 (setq articles (gnus-agent-union (gnus-uncompress-sequence (cdr arts))
964 (setq articles (sort articles '<))
965 ;; Remove known articles.
966 (when (gnus-agent-load-alist group)
967 (setq articles (gnus-sorted-intersection
969 (gnus-uncompress-range
970 (cons (1+ (caar (last gnus-agent-article-alist)))
971 (cdr (gnus-active group)))))))
973 (gnus-make-directory (nnheader-translate-file-chars
974 (file-name-directory file) t))
976 (gnus-message 7 "Fetching headers for %s..." group)
978 (set-buffer nntp-server-buffer)
979 (unless (eq 'nov (gnus-retrieve-headers articles group))
980 (nnvirtual-convert-headers))
981 ;; Save these headers for later processing.
982 (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
983 (when (file-exists-p file)
984 (gnus-agent-braid-nov group articles file))
985 (let ((coding-system-for-write
986 gnus-agent-file-coding-system))
987 (write-region (point-min) (point-max) file nil 'silent))
988 (gnus-agent-save-alist group articles nil)
989 (gnus-agent-enter-history
990 "last-header-fetched-for-session"
991 (list (cons group (nth (- (length articles) 1) articles)))
992 (time-to-days (current-time)))
995 (defsubst gnus-agent-copy-nov-line (article)
997 (set-buffer gnus-agent-overview-buffer)
999 (if (eq article (read (current-buffer)))
1000 (setq e (progn (forward-line 1) (point)))
1004 (set-buffer nntp-server-buffer)
1005 (insert-buffer-substring gnus-agent-overview-buffer b e)))
1007 (defun gnus-agent-braid-nov (group articles file)
1008 (set-buffer gnus-agent-overview-buffer)
1009 (goto-char (point-min))
1010 (set-buffer nntp-server-buffer)
1012 (nnheader-insert-file-contents file)
1013 (goto-char (point-max))
1014 (if (or (= (point-min) (point-max))
1017 (< (read (current-buffer)) (car articles))))
1018 ;; We have only headers that are after the older headers,
1019 ;; so we just append them.
1021 (goto-char (point-max))
1022 (insert-buffer-substring gnus-agent-overview-buffer))
1023 ;; We do it the hard way.
1024 (nnheader-find-nov-line (car articles))
1025 (gnus-agent-copy-nov-line (car articles))
1027 (while (and articles
1029 (while (and (not (eobp))
1030 (< (read (current-buffer)) (car articles)))
1034 (gnus-agent-copy-nov-line (car articles))
1035 (setq articles (cdr articles))))
1038 (set-buffer gnus-agent-overview-buffer)
1041 (set-buffer nntp-server-buffer)
1042 (insert-buffer-substring gnus-agent-overview-buffer b e)))))
1044 (defun gnus-agent-load-alist (group &optional dir)
1045 "Load the article-state alist for GROUP."
1046 (setq gnus-agent-article-alist
1047 (gnus-agent-read-file
1049 (expand-file-name ".agentview" dir)
1050 (gnus-agent-article-name ".agentview" group)))))
1052 (defun gnus-agent-save-alist (group &optional articles state dir)
1053 "Save the article-state alist for GROUP."
1054 (let ((file-name-coding-system nnmail-pathname-coding-system))
1055 (with-temp-file (if dir
1056 (expand-file-name ".agentview" dir)
1057 (gnus-agent-article-name ".agentview" group))
1058 (princ (setq gnus-agent-article-alist
1059 (nconc gnus-agent-article-alist
1060 (mapcar (lambda (article) (cons article state))
1065 (defun gnus-agent-article-name (article group)
1066 (expand-file-name (if (stringp article) article (string-to-number article))
1067 (file-name-as-directory
1068 (expand-file-name (gnus-agent-group-path group)
1069 (gnus-agent-directory)))))
1071 (defun gnus-agent-batch-confirmation (msg)
1072 "Show error message and return t."
1073 (gnus-message 1 msg)
1077 (defun gnus-agent-batch-fetch ()
1078 "Start Gnus and fetch session."
1081 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
1082 (gnus-agent-fetch-session))
1085 (defun gnus-agent-fetch-session ()
1086 "Fetch all articles and headers that are eligible for fetching."
1088 (unless gnus-agent-covered-methods
1089 (error "No servers are covered by the Gnus agent"))
1090 (unless gnus-plugged
1091 (error "Can't fetch articles while Gnus is unplugged"))
1092 (let ((methods gnus-agent-covered-methods)
1093 groups group gnus-command-method)
1098 (setq gnus-command-method (car methods))
1099 (when (or (gnus-server-opened gnus-command-method)
1100 (gnus-open-server gnus-command-method))
1101 (setq groups (gnus-groups-from-server (car methods)))
1102 (gnus-agent-with-fetch
1103 (while (setq group (pop groups))
1104 (when (<= (gnus-group-level group) gnus-agent-handle-level)
1105 (gnus-agent-fetch-group-1 group gnus-command-method))))))
1107 (unless (funcall gnus-agent-confirmation-function
1108 (format "Error (%s). Continue? " err))
1109 (error "Cannot fetch articles into the Gnus agent.")))
1111 (unless (funcall gnus-agent-confirmation-function
1112 (format "Quit (%s). Continue? " err))
1113 (signal 'quit "Cannot fetch articles into the Gnus agent."))))
1115 (gnus-message 6 "Finished fetching articles into the Gnus agent"))))
1117 (defun gnus-agent-fetch-group-1 (group method)
1119 (let ((gnus-command-method method)
1120 (gnus-newsgroup-name group)
1121 gnus-newsgroup-dependencies gnus-newsgroup-headers
1122 gnus-newsgroup-scored gnus-headers gnus-score
1123 gnus-use-cache articles arts
1124 category predicate info marks score-param
1125 (gnus-summary-expunge-below gnus-summary-expunge-below)
1126 (gnus-summary-mark-below gnus-summary-mark-below)
1127 (gnus-orphan-score gnus-orphan-score)
1128 ;; Maybe some other gnus-summary local variables should also
1131 (unless (gnus-check-group group)
1132 (error "Can't open server for %s" group))
1134 (when (and (or (gnus-active group) (gnus-activate-group group))
1135 (setq articles (gnus-agent-fetch-headers group))
1136 (let ((nntp-server-buffer gnus-agent-overview-buffer))
1137 ;; Parse them and see which articles we want to fetch.
1138 (setq gnus-newsgroup-dependencies
1139 (make-vector (length articles) 0))
1140 (setq gnus-newsgroup-headers
1141 (gnus-get-newsgroup-headers-xover articles nil nil
1143 ;; `gnus-agent-overview-buffer' may be killed for
1144 ;; timeout reason. If so, recreate it.
1145 (gnus-agent-create-buffer)))
1146 (setq category (gnus-group-category group))
1149 (or (gnus-group-find-parameter group 'agent-predicate t)
1151 (if (memq (caaddr predicate) '(gnus-agent-true gnus-agent-false))
1152 ;; Simple implementation
1154 (and (eq (caaddr predicate) 'gnus-agent-true) articles))
1157 (or (gnus-group-get-parameter group 'agent-score t)
1159 ;; Translate score-param into real one
1162 ((eq score-param 'file)
1163 (setq score-param (gnus-all-score-files group)))
1164 ((stringp (car score-param)))
1166 (setq score-param (list (list score-param)))))
1168 (gnus-score-headers score-param))
1169 (while (setq gnus-headers (pop gnus-newsgroup-headers))
1171 (or (cdr (assq (mail-header-number gnus-headers)
1172 gnus-newsgroup-scored))
1173 gnus-summary-default-score))
1174 (when (funcall predicate)
1175 (push (mail-header-number gnus-headers)
1177 ;; Fetch the articles.
1179 (gnus-agent-fetch-articles group arts)))
1180 ;; Perhaps we have some additional articles to fetch.
1181 (setq arts (assq 'download (gnus-info-marks
1182 (setq info (gnus-get-info group)))))
1184 (gnus-agent-fetch-articles
1185 group (gnus-uncompress-range (cdr arts)))
1186 (setq marks (delq arts (gnus-info-marks info)))
1187 (gnus-info-set-marks info marks)
1189 (concat "(gnus-group-set-info '"
1190 (gnus-prin1-to-string info)
1194 ;;; Agent Category Mode
1197 (defvar gnus-category-mode-hook nil
1198 "Hook run in `gnus-category-mode' buffers.")
1200 (defvar gnus-category-line-format " %(%20c%): %g\n"
1201 "Format of category lines.")
1203 (defvar gnus-category-mode-line-format "Gnus: %%b"
1204 "The format specification for the category mode line.")
1206 (defvar gnus-agent-short-article 100
1207 "Articles that have fewer lines than this are short.")
1209 (defvar gnus-agent-long-article 200
1210 "Articles that have more lines than this are long.")
1212 (defvar gnus-agent-low-score 0
1213 "Articles that have a score lower than this have a low score.")
1215 (defvar gnus-agent-high-score 0
1216 "Articles that have a score higher than this have a high score.")
1219 ;;; Internal variables.
1221 (defvar gnus-category-buffer "*Agent Category*")
1223 (defvar gnus-category-line-format-alist
1224 `((?c gnus-tmp-name ?s)
1225 (?g gnus-tmp-groups ?d)))
1227 (defvar gnus-category-mode-line-format-alist
1228 `((?u user-defined ?s)))
1230 (defvar gnus-category-line-format-spec nil)
1231 (defvar gnus-category-mode-line-format-spec nil)
1233 (defvar gnus-category-mode-map nil)
1234 (put 'gnus-category-mode 'mode-class 'special)
1236 (unless gnus-category-mode-map
1237 (setq gnus-category-mode-map (make-sparse-keymap))
1238 (suppress-keymap gnus-category-mode-map)
1240 (gnus-define-keys gnus-category-mode-map
1241 "q" gnus-category-exit
1242 "k" gnus-category-kill
1243 "c" gnus-category-copy
1244 "a" gnus-category-add
1245 "p" gnus-category-edit-predicate
1246 "g" gnus-category-edit-groups
1247 "s" gnus-category-edit-score
1248 "l" gnus-category-list
1250 "\C-c\C-i" gnus-info-find-node
1251 "\C-c\C-b" gnus-bug))
1253 (defvar gnus-category-menu-hook nil
1254 "*Hook run after the creation of the menu.")
1256 (defun gnus-category-make-menu-bar ()
1257 (gnus-turn-off-edit-menu 'category)
1258 (unless (boundp 'gnus-category-menu)
1260 gnus-category-menu gnus-category-mode-map ""
1262 ["Add" gnus-category-add t]
1263 ["Kill" gnus-category-kill t]
1264 ["Copy" gnus-category-copy t]
1265 ["Edit predicate" gnus-category-edit-predicate t]
1266 ["Edit score" gnus-category-edit-score t]
1267 ["Edit groups" gnus-category-edit-groups t]
1268 ["Exit" gnus-category-exit t]))
1270 (gnus-run-hooks 'gnus-category-menu-hook)))
1272 (defun gnus-category-mode ()
1273 "Major mode for listing and editing agent categories.
1275 All normal editing commands are switched off.
1276 \\<gnus-category-mode-map>
1277 For more in-depth information on this mode, read the manual
1278 (`\\[gnus-info-find-node]').
1280 The following commands are available:
1282 \\{gnus-category-mode-map}"
1284 (when (gnus-visual-p 'category-menu 'menu)
1285 (gnus-category-make-menu-bar))
1286 (kill-all-local-variables)
1287 (gnus-simplify-mode-line)
1288 (setq major-mode 'gnus-category-mode)
1289 (setq mode-name "Category")
1290 (gnus-set-default-directory)
1291 (setq mode-line-process nil)
1292 (use-local-map gnus-category-mode-map)
1293 (buffer-disable-undo)
1294 (setq truncate-lines t)
1295 (setq buffer-read-only t)
1296 (gnus-run-hooks 'gnus-category-mode-hook))
1298 (defalias 'gnus-category-position-point 'gnus-goto-colon)
1300 (defun gnus-category-insert-line (category)
1301 (let* ((gnus-tmp-name (car category))
1302 (gnus-tmp-groups (length (cadddr category))))
1304 (gnus-add-text-properties
1308 (eval gnus-category-line-format-spec))
1309 (list 'gnus-category gnus-tmp-name))))
1311 (defun gnus-enter-category-buffer ()
1312 "Go to the Category buffer."
1314 (gnus-category-setup-buffer)
1315 (gnus-configure-windows 'category)
1316 (gnus-category-prepare))
1318 (defun gnus-category-setup-buffer ()
1319 (unless (get-buffer gnus-category-buffer)
1321 (set-buffer (gnus-get-buffer-create gnus-category-buffer))
1322 (gnus-category-mode))))
1324 (defun gnus-category-prepare ()
1325 (gnus-set-format 'category-mode)
1326 (gnus-set-format 'category t)
1327 (let ((alist gnus-category-alist)
1328 (buffer-read-only nil))
1331 (gnus-category-insert-line (pop alist)))
1332 (goto-char (point-min))
1333 (gnus-category-position-point)))
1335 (defun gnus-category-name ()
1336 (or (get-text-property (gnus-point-at-bol) 'gnus-category)
1337 (error "No category on the current line")))
1339 (defun gnus-category-read ()
1340 "Read the category alist."
1341 (setq gnus-category-alist
1342 (or (gnus-agent-read-file
1343 (nnheader-concat gnus-agent-directory "lib/categories"))
1344 (list (list 'default 'short nil nil)))))
1346 (defun gnus-category-write ()
1347 "Write the category alist."
1348 (setq gnus-category-predicate-cache nil
1349 gnus-category-group-cache nil)
1350 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
1351 (with-temp-file (nnheader-concat gnus-agent-directory "lib/categories")
1352 (prin1 gnus-category-alist (current-buffer))))
1354 (defun gnus-category-edit-predicate (category)
1355 "Edit the predicate for CATEGORY."
1356 (interactive (list (gnus-category-name)))
1357 (let ((info (assq category gnus-category-alist)))
1359 (cadr info) (format "Editing the predicate for category %s" category)
1360 `(lambda (predicate)
1361 (setcar (cdr (assq ',category gnus-category-alist)) predicate)
1362 (gnus-category-write)
1363 (gnus-category-list)))))
1365 (defun gnus-category-edit-score (category)
1366 "Edit the score expression for CATEGORY."
1367 (interactive (list (gnus-category-name)))
1368 (let ((info (assq category gnus-category-alist)))
1371 (format "Editing the score expression for category %s" category)
1373 (setcar (cddr (assq ',category gnus-category-alist)) groups)
1374 (gnus-category-write)
1375 (gnus-category-list)))))
1377 (defun gnus-category-edit-groups (category)
1378 "Edit the group list for CATEGORY."
1379 (interactive (list (gnus-category-name)))
1380 (let ((info (assq category gnus-category-alist)))
1382 (cadddr info) (format "Editing the group list for category %s" category)
1384 (setcar (nthcdr 3 (assq ',category gnus-category-alist)) groups)
1385 (gnus-category-write)
1386 (gnus-category-list)))))
1388 (defun gnus-category-kill (category)
1389 "Kill the current category."
1390 (interactive (list (gnus-category-name)))
1391 (let ((info (assq category gnus-category-alist))
1392 (buffer-read-only nil))
1394 (setq gnus-category-alist (delq info gnus-category-alist))
1395 (gnus-category-write)))
1397 (defun gnus-category-copy (category to)
1398 "Copy the current category."
1399 (interactive (list (gnus-category-name) (intern (read-string "New name: "))))
1400 (let ((info (assq category gnus-category-alist)))
1401 (push (list to (gnus-copy-sequence (cadr info))
1402 (gnus-copy-sequence (caddr info)) nil)
1403 gnus-category-alist)
1404 (gnus-category-write)
1405 (gnus-category-list)))
1407 (defun gnus-category-add (category)
1408 "Create a new category."
1409 (interactive "SCategory name: ")
1410 (when (assq category gnus-category-alist)
1411 (error "Category %s already exists" category))
1412 (push (list category 'false nil nil)
1413 gnus-category-alist)
1414 (gnus-category-write)
1415 (gnus-category-list))
1417 (defun gnus-category-list ()
1418 "List all categories."
1420 (gnus-category-prepare))
1422 (defun gnus-category-exit ()
1423 "Return to the group buffer."
1425 (kill-buffer (current-buffer))
1426 (gnus-configure-windows 'group t))
1428 ;; To avoid having 8-bit characters in the source file.
1429 (defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))
1431 (defvar gnus-category-predicate-alist
1432 '((spam . gnus-agent-spam-p)
1433 (short . gnus-agent-short-p)
1434 (long . gnus-agent-long-p)
1435 (low . gnus-agent-low-scored-p)
1436 (high . gnus-agent-high-scored-p)
1437 (true . gnus-agent-true)
1438 (false . gnus-agent-false))
1439 "Mapping from short score predicate symbols to predicate functions.")
1441 (defun gnus-agent-spam-p ()
1442 "Say whether an article is spam or not."
1443 (unless gnus-agent-spam-hashtb
1444 (setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
1445 (if (not (equal (mail-header-references gnus-headers) ""))
1447 (let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
1449 (gnus-gethash string gnus-agent-spam-hashtb)
1450 (gnus-sethash string t gnus-agent-spam-hashtb)))))
1452 (defun gnus-agent-short-p ()
1453 "Say whether an article is short or not."
1454 (< (mail-header-lines gnus-headers) gnus-agent-short-article))
1456 (defun gnus-agent-long-p ()
1457 "Say whether an article is long or not."
1458 (> (mail-header-lines gnus-headers) gnus-agent-long-article))
1460 (defun gnus-agent-low-scored-p ()
1461 "Say whether an article has a low score or not."
1462 (< gnus-score gnus-agent-low-score))
1464 (defun gnus-agent-high-scored-p ()
1465 "Say whether an article has a high score or not."
1466 (> gnus-score gnus-agent-high-score))
1468 (defun gnus-category-make-function (cat)
1469 "Make a function from category CAT."
1470 `(lambda () ,(gnus-category-make-function-1 cat)))
1472 (defun gnus-agent-true ()
1476 (defun gnus-agent-false ()
1480 (defun gnus-category-make-function-1 (cat)
1481 "Make a function from category CAT."
1483 ;; Functions are just returned as is.
1485 (gnus-functionp cat))
1486 `(,(or (cdr (assq cat gnus-category-predicate-alist))
1488 ;; More complex category.
1491 ((memq (car cat) '(& and))
1493 ((memq (car cat) '(| or))
1495 ((memq (car cat) gnus-category-not)
1497 ,@(mapcar 'gnus-category-make-function-1 (cdr cat))))
1499 (error "Unknown category type: %s" cat))))
1501 (defun gnus-get-predicate (predicate)
1502 "Return the predicate for CATEGORY."
1503 (or (cdr (assoc predicate gnus-category-predicate-cache))
1504 (cdar (push (cons predicate
1505 (gnus-category-make-function predicate))
1506 gnus-category-predicate-cache))))
1508 (defun gnus-group-category (group)
1509 "Return the category GROUP belongs to."
1510 (unless gnus-category-group-cache
1511 (setq gnus-category-group-cache (gnus-make-hashtable 1000))
1512 (let ((cs gnus-category-alist)
1514 (while (setq cat (pop cs))
1515 (setq groups (cadddr cat))
1517 (gnus-sethash (pop groups) cat gnus-category-group-cache)))))
1518 (or (gnus-gethash group gnus-category-group-cache)
1519 (assq 'default gnus-category-alist)))
1521 (defun gnus-agent-expire ()
1522 "Expire all old articles."
1524 (let ((methods gnus-agent-covered-methods)
1525 (day (- (time-to-days (current-time)) gnus-agent-expire-days))
1526 gnus-command-method sym group articles
1527 history overview file histories elem art nov-file low info
1528 unreads marked article orig lowest highest)
1530 (setq overview (gnus-get-buffer-create " *expire overview*"))
1531 (while (setq gnus-command-method (pop methods))
1532 (when (file-exists-p (gnus-agent-lib-file "active"))
1534 (nnheader-insert-file-contents (gnus-agent-lib-file "active"))
1535 (gnus-active-to-gnus-format
1537 (setq orig (gnus-make-hashtable
1538 (count-lines (point-min) (point-max))))))
1539 (let ((expiry-hashtb (gnus-make-hashtable 1023)))
1540 (gnus-agent-open-history)
1542 (setq gnus-agent-current-history
1543 (setq history (gnus-agent-history-buffer))))
1544 (goto-char (point-min))
1545 (when (> (buffer-size) 1)
1546 (goto-char (point-min))
1548 (skip-chars-forward "^\t")
1549 (if (> (read (current-buffer)) day)
1550 ;; New article; we don't expire it.
1552 ;; Old article. Schedule it for possible nuking.
1554 (setq sym (let ((obarray expiry-hashtb) s)
1555 (setq s (read (current-buffer)))
1556 (if (stringp s) (intern s) s)))
1558 (set sym (cons (cons (read (current-buffer)) (point))
1559 (symbol-value sym)))
1560 (set sym (list (cons (read (current-buffer)) (point)))))
1561 (skip-chars-forward " "))
1563 ;; We now have all articles that can possibly be expired.
1566 (setq group (symbol-name sym)
1567 articles (sort (symbol-value sym) 'car-less-than-car)
1568 low (car (gnus-active group))
1569 info (gnus-get-info group)
1570 unreads (ignore-errors
1571 (gnus-list-of-unread-articles group))
1573 (gnus-uncompress-range
1574 (cdr (assq 'tick (gnus-info-marks info))))
1575 (gnus-uncompress-range
1577 (gnus-info-marks info)))))
1578 nov-file (gnus-agent-article-name ".overview" group)
1581 (gnus-agent-load-alist group)
1582 (gnus-message 5 "Expiring articles in %s" group)
1583 (set-buffer overview)
1585 (when (file-exists-p nov-file)
1586 (nnheader-insert-file-contents nov-file))
1587 (goto-char (point-min))
1589 (while (setq elem (pop articles))
1590 (setq article (car elem))
1591 (when (or (null low)
1593 gnus-agent-expire-all
1594 (and (not (memq article unreads))
1595 (not (memq article marked))))
1596 ;; Find and nuke the NOV line.
1597 (while (and (not (eobp))
1599 (setq art (read (current-buffer)))))
1601 (if (and (numberp art)
1603 (gnus-agent-article-name
1604 (number-to-string art) group)))
1610 ;; Remove old NOV lines that have no articles.
1611 (gnus-delete-line)))
1616 ;; Nuke the article.
1617 (when (file-exists-p
1618 (setq file (gnus-agent-article-name
1619 (number-to-string article)
1622 ;; Schedule the history line for nuking.
1623 (push (cdr elem) histories)))
1624 (gnus-make-directory (file-name-directory nov-file))
1625 (let ((coding-system-for-write
1626 gnus-agent-file-coding-system))
1627 (write-region (point-min) (point-max) nov-file nil 'silent))
1628 ;; Delete the unwanted entries in the alist.
1629 (setq gnus-agent-article-alist
1630 (sort gnus-agent-article-alist 'car-less-than-car))
1631 (let* ((alist gnus-agent-article-alist)
1632 (prev (cons nil alist))
1636 (<= (caar alist) article))
1637 (if (or (not (cdar alist))
1639 (gnus-agent-article-name
1644 (push (caar alist) expired)
1645 (setcdr prev (setq alist (cdr alist))))
1647 alist (cdr alist))))
1648 (setq gnus-agent-article-alist (cdr first))
1649 (gnus-agent-save-alist group)
1650 ;; Mark all articles up to the first article
1651 ;; in `gnus-article-alist' as read.
1652 (when (and info (caar gnus-agent-article-alist))
1653 (setcar (nthcdr 2 info)
1656 (cons 1 (- (caar gnus-agent-article-alist) 1)))))
1657 ;; Maybe everything has been expired from `gnus-article-alist'
1658 ;; and so the above marking as read could not be conducted,
1659 ;; or there are expired article within the range of the alist.
1662 (or (not (caar gnus-agent-article-alist))
1664 (caar gnus-agent-article-alist))))
1665 (setcar (nthcdr 2 info)
1668 (nreverse expired))))
1670 (concat "(gnus-group-set-info '"
1671 (gnus-prin1-to-string info)
1674 (if (gnus-gethash group orig)
1675 (setcar (gnus-gethash group orig) lowest)
1676 (gnus-sethash group (cons lowest highest) orig))))
1678 (set-buffer history)
1679 (setq histories (nreverse (sort histories '<)))
1681 (goto-char (pop histories))
1683 (gnus-agent-save-history)
1684 (gnus-agent-close-history)
1685 (gnus-write-active-file
1686 (gnus-agent-lib-file "active") orig))
1687 (gnus-message 4 "Expiry...done")))))))
1690 (defun gnus-agent-batch ()
1692 (let ((init-file-user "")
1693 (gnus-always-read-dribble-file t))
1695 (gnus-group-send-drafts)
1696 (gnus-agent-fetch-session))
1698 (provide 'gnus-agent)
1700 ;;; gnus-agent.el ends here