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 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
74 (when (featurep 'xemacs)
75 (add-hook 'gnus-agent-group-mode-hook 'gnus-xmas-agent-group-menu-add))
77 (defcustom gnus-agent-summary-mode-hook nil
78 "Hook run in Agent summary minor modes."
82 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
83 (when (featurep 'xemacs)
84 (add-hook 'gnus-agent-summary-mode-hook 'gnus-xmas-agent-summary-menu-add))
86 (defcustom gnus-agent-server-mode-hook nil
87 "Hook run in Agent summary minor modes."
91 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
92 (when (featurep 'xemacs)
93 (add-hook 'gnus-agent-server-mode-hook 'gnus-xmas-agent-server-menu-add))
95 (defcustom gnus-agent-confirmation-function 'y-or-n-p
96 "Function to confirm when error happens."
101 (defcustom gnus-agent-synchronize-flags 'ask
102 "Indicate if flags are synchronized when you plug in.
103 If this is `ask' the hook will query the user."
105 :type '(choice (const :tag "Always" t)
106 (const :tag "Never" nil)
107 (const :tag "Ask" ask))
110 ;;; Internal variables
112 (defvar gnus-agent-history-buffers nil)
113 (defvar gnus-agent-buffer-alist nil)
114 (defvar gnus-agent-article-alist nil)
115 (defvar gnus-agent-group-alist nil)
116 (defvar gnus-agent-covered-methods nil)
117 (defvar gnus-category-alist nil)
118 (defvar gnus-agent-current-history nil)
119 (defvar gnus-agent-overview-buffer nil)
120 (defvar gnus-category-predicate-cache nil)
121 (defvar gnus-category-group-cache nil)
122 (defvar gnus-agent-spam-hashtb nil)
123 (defvar gnus-agent-file-name nil)
124 (defvar gnus-agent-send-mail-function nil)
125 (defvar gnus-agent-file-coding-system 'raw-text)
128 (defvar gnus-headers)
135 (defun gnus-open-agent ()
137 (gnus-agent-read-servers)
139 (gnus-agent-create-buffer)
140 (add-hook 'gnus-group-mode-hook 'gnus-agent-mode)
141 (add-hook 'gnus-summary-mode-hook 'gnus-agent-mode)
142 (add-hook 'gnus-server-mode-hook 'gnus-agent-mode))
144 (defun gnus-agent-create-buffer ()
145 (if (gnus-buffer-live-p gnus-agent-overview-buffer)
147 (setq gnus-agent-overview-buffer
148 (gnus-get-buffer-create " *Gnus agent overview*"))
149 (with-current-buffer gnus-agent-overview-buffer
150 (mm-enable-multibyte))
153 (gnus-add-shutdown 'gnus-close-agent 'gnus)
155 (defun gnus-close-agent ()
156 (setq gnus-agent-covered-methods nil
157 gnus-category-predicate-cache nil
158 gnus-category-group-cache nil
159 gnus-agent-spam-hashtb nil)
160 (gnus-kill-buffer gnus-agent-overview-buffer))
163 ;;; Utility functions
166 (defun gnus-agent-read-file (file)
167 "Load FILE and do a `read' there."
170 (nnheader-insert-file-contents file)
171 (goto-char (point-min))
172 (read (current-buffer)))))
174 (defsubst gnus-agent-method ()
175 (concat (symbol-name (car gnus-command-method)) "/"
176 (if (equal (cadr gnus-command-method) "")
178 (cadr gnus-command-method))))
180 (defsubst gnus-agent-directory ()
181 "Path of the Gnus agent directory."
182 (nnheader-concat gnus-agent-directory
183 (nnheader-translate-file-chars (gnus-agent-method)) "/"))
185 (defun gnus-agent-lib-file (file)
186 "The full path of the Gnus agent library FILE."
187 (expand-file-name file
188 (file-name-as-directory
189 (expand-file-name "agent.lib" (gnus-agent-directory)))))
191 ;;; Fetching setup functions.
193 (defun gnus-agent-start-fetch ()
194 "Initialize data structures for efficient fetching."
195 (gnus-agent-open-history)
196 (setq gnus-agent-current-history (gnus-agent-history-buffer))
197 (gnus-agent-create-buffer))
199 (defun gnus-agent-stop-fetch ()
200 "Save all data structures and clean up."
201 (gnus-agent-save-history)
202 (gnus-agent-close-history)
203 (setq gnus-agent-spam-hashtb nil)
205 (set-buffer nntp-server-buffer)
208 (defmacro gnus-agent-with-fetch (&rest forms)
211 (let ((gnus-agent-fetching t))
212 (gnus-agent-start-fetch)
214 (gnus-agent-stop-fetch)))
216 (put 'gnus-agent-with-fetch 'lisp-indent-function 0)
217 (put 'gnus-agent-with-fetch 'edebug-form-spec '(body))
223 (defvar gnus-agent-mode-hook nil
224 "Hook run when installing agent mode.")
226 (defvar gnus-agent-mode nil)
227 (defvar gnus-agent-mode-status '(gnus-agent-mode " Plugged"))
229 (defun gnus-agent-mode ()
230 "Minor mode for providing a agent support in Gnus buffers."
231 (let* ((buffer (progn (string-match "^gnus-\\(.*\\)-mode$"
232 (symbol-name major-mode))
233 (match-string 1 (symbol-name major-mode))))
234 (mode (intern (format "gnus-agent-%s-mode" buffer))))
235 (set (make-local-variable 'gnus-agent-mode) t)
237 (set (make-local-variable mode) t)
239 (when (gnus-visual-p 'agent-menu 'menu)
240 (funcall (intern (format "gnus-agent-%s-make-menu-bar" buffer))))
241 (unless (assq 'gnus-agent-mode minor-mode-alist)
242 (push gnus-agent-mode-status minor-mode-alist))
243 (unless (assq mode minor-mode-map-alist)
244 (push (cons mode (symbol-value (intern (format "gnus-agent-%s-mode-map"
246 minor-mode-map-alist))
247 (when (eq major-mode 'gnus-group-mode)
248 (gnus-agent-toggle-plugged gnus-plugged))
249 (gnus-run-hooks 'gnus-agent-mode-hook
250 (intern (format "gnus-agent-%s-mode-hook" buffer)))))
252 (defvar gnus-agent-group-mode-map (make-sparse-keymap))
253 (gnus-define-keys gnus-agent-group-mode-map
254 "Ju" gnus-agent-fetch-groups
255 "Jc" gnus-enter-category-buffer
256 "Jj" gnus-agent-toggle-plugged
257 "Js" gnus-agent-fetch-session
258 "JY" gnus-agent-synchronize-flags
259 "JS" gnus-group-send-drafts
260 "Ja" gnus-agent-add-group
261 "Jr" gnus-agent-remove-group)
263 (defun gnus-agent-group-make-menu-bar ()
264 (unless (boundp 'gnus-agent-group-menu)
266 gnus-agent-group-menu gnus-agent-group-mode-map ""
268 ["Toggle plugged" gnus-agent-toggle-plugged t]
269 ["List categories" gnus-enter-category-buffer t]
270 ["Send drafts" gnus-group-send-drafts gnus-plugged]
272 ["All" gnus-agent-fetch-session gnus-plugged]
273 ["Group" gnus-agent-fetch-group gnus-plugged])))))
275 (defvar gnus-agent-summary-mode-map (make-sparse-keymap))
276 (gnus-define-keys gnus-agent-summary-mode-map
277 "Jj" gnus-agent-toggle-plugged
278 "J#" gnus-agent-mark-article
279 "J\M-#" gnus-agent-unmark-article
280 "@" gnus-agent-toggle-mark
281 "Jc" gnus-agent-catchup)
283 (defun gnus-agent-summary-make-menu-bar ()
284 (unless (boundp 'gnus-agent-summary-menu)
286 gnus-agent-summary-menu gnus-agent-summary-mode-map ""
288 ["Toggle plugged" gnus-agent-toggle-plugged t]
289 ["Mark as downloadable" gnus-agent-mark-article t]
290 ["Unmark as downloadable" gnus-agent-unmark-article t]
291 ["Toggle mark" gnus-agent-toggle-mark t]
292 ["Catchup undownloaded" gnus-agent-catchup t]))))
294 (defvar gnus-agent-server-mode-map (make-sparse-keymap))
295 (gnus-define-keys gnus-agent-server-mode-map
296 "Jj" gnus-agent-toggle-plugged
297 "Ja" gnus-agent-add-server
298 "Jr" gnus-agent-remove-server)
300 (defun gnus-agent-server-make-menu-bar ()
301 (unless (boundp 'gnus-agent-server-menu)
303 gnus-agent-server-menu gnus-agent-server-mode-map ""
305 ["Toggle plugged" gnus-agent-toggle-plugged t]
306 ["Add" gnus-agent-add-server t]
307 ["Remove" gnus-agent-remove-server t]))))
309 (defun gnus-agent-toggle-plugged (plugged)
310 "Toggle whether Gnus is unplugged or not."
311 (interactive (list (not gnus-plugged)))
314 (setq gnus-plugged plugged)
315 (gnus-agent-possibly-synchronize-flags)
316 (gnus-run-hooks 'gnus-agent-plugged-hook)
317 (setcar (cdr gnus-agent-mode-status) " Plugged"))
318 (gnus-agent-close-connections)
319 (setq gnus-plugged plugged)
320 (gnus-run-hooks 'gnus-agent-unplugged-hook)
321 (setcar (cdr gnus-agent-mode-status) " Unplugged"))
322 (set-buffer-modified-p t))
324 (defun gnus-agent-close-connections ()
325 "Close all methods covered by the Gnus agent."
326 (let ((methods gnus-agent-covered-methods))
328 (gnus-close-server (pop methods)))))
331 (defun gnus-unplugged ()
332 "Start Gnus unplugged."
334 (setq gnus-plugged nil)
338 (defun gnus-plugged ()
339 "Start Gnus plugged."
341 (setq gnus-plugged t)
345 (defun gnus-agentize ()
346 "Allow Gnus to be an offline newsreader.
347 The normal usage of this command is to put the following as the
348 last form in your `.gnus.el' file:
352 This will modify the `gnus-before-startup-hook', `gnus-post-method',
353 and `message-send-mail-function' variables, and install the Gnus
354 agent minor mode in all Gnus buffers."
357 (add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
358 (unless gnus-agent-send-mail-function
359 (setq gnus-agent-send-mail-function message-send-mail-function
360 message-send-mail-function 'gnus-agent-send-mail))
361 (unless gnus-agent-covered-methods
362 (setq gnus-agent-covered-methods (list gnus-select-method))))
364 (defun gnus-agent-queue-setup ()
365 "Make sure the queue group exists."
366 (unless (gnus-gethash "nndraft:queue" gnus-newsrc-hashtb)
367 (gnus-request-create-group "queue" '(nndraft ""))
368 (let ((gnus-level-default-subscribed 1))
369 (gnus-subscribe-group "nndraft:queue" nil '(nndraft "")))
370 (gnus-group-set-parameter
371 "nndraft:queue" 'gnus-dummy '((gnus-draft-mode)))))
373 (defun gnus-agent-send-mail ()
375 (funcall gnus-agent-send-mail-function)
376 (goto-char (point-min))
378 (concat "^" (regexp-quote mail-header-separator) "\n"))
380 (gnus-agent-insert-meta-information 'mail)
381 (gnus-request-accept-article "nndraft:queue" nil t t)))
383 (defun gnus-agent-insert-meta-information (type &optional method)
384 "Insert meta-information into the message that says how it's to be posted.
385 TYPE can be either `mail' or `news'. If the latter, then METHOD can
388 (message-remove-header gnus-agent-meta-information-header)
389 (goto-char (point-min))
390 (insert gnus-agent-meta-information-header ": "
391 (symbol-name type) " " (format "%S" method)
394 (while (search-backward "\n" nil t)
395 (replace-match "\\n" t t))))
397 (defun gnus-agent-restore-gcc ()
398 "Restore GCC field from saved header."
400 (goto-char (point-min))
401 (while (re-search-forward (concat gnus-agent-gcc-header ":") nil t)
402 (replace-match "Gcc:" 'fixedcase))))
404 (defun gnus-agent-any-covered-gcc ()
406 (message-narrow-to-headers)
407 (let* ((gcc (mail-fetch-field "gcc" nil t))
409 (mapcar 'gnus-inews-group-method
410 (message-unquote-tokens
411 (message-tokenize-header
414 (while (and (not covered) methods)
416 (member (car methods) gnus-agent-covered-methods)
417 methods (cdr methods)))
420 (defun gnus-agent-possibly-save-gcc ()
421 "Save GCC if Gnus is unplugged."
422 (when (and (not gnus-plugged) (gnus-agent-any-covered-gcc))
424 (goto-char (point-min))
425 (let ((case-fold-search t))
426 (while (re-search-forward "^gcc:" nil t)
427 (replace-match (concat gnus-agent-gcc-header ":") 'fixedcase))))))
429 (defun gnus-agent-possibly-do-gcc ()
430 "Do GCC if Gnus is plugged."
431 (when (or gnus-plugged (not (gnus-agent-any-covered-gcc)))
432 (gnus-inews-do-gcc)))
435 ;;; Group mode commands
438 (defun gnus-agent-fetch-groups (n)
439 "Put all new articles in the current groups into the Agent."
442 (error "Groups can't be fetched when Gnus is unplugged"))
443 (gnus-group-iterate n 'gnus-agent-fetch-group))
445 (defun gnus-agent-fetch-group (group)
446 "Put all new articles in GROUP into the Agent."
447 (interactive (list (gnus-group-group-name)))
449 (error "Groups can't be fetched when Gnus is unplugged"))
451 (error "No group on the current line"))
452 (let ((gnus-command-method (gnus-find-method-for-group group)))
453 (gnus-agent-with-fetch
454 (gnus-agent-fetch-group-1 group gnus-command-method)
455 (gnus-message 5 "Fetching %s...done" group))))
457 (defun gnus-agent-add-group (category arg)
458 "Add the current group to an agent category."
464 (mapcar (lambda (cat) (list (symbol-name (car cat))))
468 (let ((cat (assq category gnus-category-alist))
470 (gnus-group-iterate arg
472 (when (cadddr (setq c (gnus-group-category group)))
473 (setf (cadddr c) (delete group (cadddr c))))
474 (push group groups)))
475 (setf (cadddr cat) (nconc (cadddr cat) groups))
476 (gnus-category-write)))
478 (defun gnus-agent-remove-group (arg)
479 "Remove the current group from its agent category, if any."
482 (gnus-group-iterate arg
484 (when (cadddr (setq c (gnus-group-category group)))
485 (setf (cadddr c) (delete group (cadddr c))))))
486 (gnus-category-write)))
488 (defun gnus-agent-synchronize-flags ()
489 "Synchronize unplugged flags with servers."
492 (dolist (gnus-command-method gnus-agent-covered-methods)
493 (when (file-exists-p (gnus-agent-lib-file "flags"))
494 (gnus-agent-synchronize-flags-server gnus-command-method)))))
496 (defun gnus-agent-possibly-synchronize-flags ()
497 "Synchronize flags according to `gnus-agent-synchronize-flags'."
500 (dolist (gnus-command-method gnus-agent-covered-methods)
501 (when (file-exists-p (gnus-agent-lib-file "flags"))
502 (gnus-agent-possibly-synchronize-flags-server gnus-command-method)))))
504 (defun gnus-agent-synchronize-flags-server (method)
505 "Synchronize flags set when unplugged for server."
506 (let ((gnus-command-method method))
507 (when (file-exists-p (gnus-agent-lib-file "flags"))
508 (set-buffer (get-buffer-create " *Gnus Agent flag synchronize*"))
510 (nnheader-insert-file-contents (gnus-agent-lib-file "flags"))
511 (if (null (gnus-check-server gnus-command-method))
512 (message "Couldn't open server %s" (nth 1 gnus-command-method))
514 (if (null (eval (read (current-buffer))))
515 (progn (forward-line)
517 (write-file (gnus-agent-lib-file "flags"))
518 (error "Couldn't set flags from file %s"
519 (gnus-agent-lib-file "flags"))))
520 (delete-file (gnus-agent-lib-file "flags")))
523 (defun gnus-agent-possibly-synchronize-flags-server (method)
524 "Synchronize flags for server according to `gnus-agent-synchronize-flags'."
525 (when (or (and gnus-agent-synchronize-flags
526 (not (eq gnus-agent-synchronize-flags 'ask)))
527 (and (eq gnus-agent-synchronize-flags 'ask)
528 (gnus-y-or-n-p (format "Synchronize flags on server `%s'? "
530 (gnus-agent-synchronize-flags-server method)))
533 ;;; Server mode commands
536 (defun gnus-agent-add-server (server)
537 "Enroll SERVER in 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 (when (member method gnus-agent-covered-methods)
543 (error "Server already in the agent program"))
544 (push method gnus-agent-covered-methods)
545 (gnus-agent-write-servers)
546 (message "Entered %s into the Agent" server)))
548 (defun gnus-agent-remove-server (server)
549 "Remove SERVER from the agent program."
550 (interactive (list (gnus-server-server-name)))
552 (error "No server on the current line"))
553 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
554 (unless (member method gnus-agent-covered-methods)
555 (error "Server not in the agent program"))
556 (setq gnus-agent-covered-methods
557 (delete method gnus-agent-covered-methods))
558 (gnus-agent-write-servers)
559 (message "Removed %s from the agent" server)))
561 (defun gnus-agent-read-servers ()
562 "Read the alist of covered servers."
563 (setq gnus-agent-covered-methods
564 (gnus-agent-read-file
565 (nnheader-concat gnus-agent-directory "lib/servers"))))
567 (defun gnus-agent-write-servers ()
568 "Write the alist of covered servers."
569 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
570 (let ((coding-system-for-write nnheader-file-coding-system)
571 (file-name-coding-system nnmail-pathname-coding-system))
572 (with-temp-file (nnheader-concat gnus-agent-directory "lib/servers")
573 (prin1 gnus-agent-covered-methods (current-buffer)))))
579 (defun gnus-agent-mark-article (n &optional unmark)
580 "Mark the next N articles as downloadable.
581 If N is negative, mark backward instead. If UNMARK is non-nil, remove
582 the mark instead. The difference between N and the actual number of
583 articles marked is returned."
585 (let ((backward (< n 0))
590 (gnus-summary-set-agent-mark
591 (gnus-summary-article-number) unmark)
592 (zerop (gnus-summary-next-subject (if backward -1 1) nil t))))
595 (gnus-message 7 "No more articles"))
596 (gnus-summary-recenter)
597 (gnus-summary-position-point)
600 (defun gnus-agent-unmark-article (n)
601 "Remove the downloadable mark from the next N articles.
602 If N is negative, unmark backward instead. The difference between N and
603 the actual number of articles unmarked is returned."
605 (gnus-agent-mark-article n t))
607 (defun gnus-agent-toggle-mark (n)
608 "Toggle the downloadable mark from the next N articles.
609 If N is negative, toggle backward instead. The difference between N and
610 the actual number of articles toggled is returned."
612 (gnus-agent-mark-article n 'toggle))
614 (defun gnus-summary-set-agent-mark (article &optional unmark)
615 "Mark ARTICLE as downloadable."
616 (let ((unmark (if (and (not (null unmark)) (not (eq t unmark)))
617 (memq article gnus-newsgroup-downloadable)
621 (setq gnus-newsgroup-downloadable
622 (delq article gnus-newsgroup-downloadable))
623 (push article gnus-newsgroup-undownloaded))
624 (setq gnus-newsgroup-undownloaded
625 (delq article gnus-newsgroup-undownloaded))
626 (push article gnus-newsgroup-downloadable))
627 (gnus-summary-update-mark
628 (if unmark gnus-undownloaded-mark gnus-downloadable-mark)
631 (defun gnus-agent-get-undownloaded-list ()
632 "Mark all unfetched articles as read."
633 (let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
634 (when (and (not gnus-plugged)
635 (gnus-agent-method-p gnus-command-method))
636 (gnus-agent-load-alist gnus-newsgroup-name)
637 ;; First mark all undownloaded articles as undownloaded.
638 (let ((articles (append gnus-newsgroup-unreads
639 gnus-newsgroup-marked
640 gnus-newsgroup-dormant))
642 (while (setq article (pop articles))
643 (unless (or (cdr (assq article gnus-agent-article-alist))
644 (memq article gnus-newsgroup-downloadable)
645 (memq article gnus-newsgroup-cached))
646 (push article gnus-newsgroup-undownloaded))))
647 ;; Then mark downloaded downloadable as not-downloadable,
648 ;; if you get my drift.
649 (let ((articles gnus-newsgroup-downloadable)
651 (while (setq article (pop articles))
652 (when (cdr (assq article gnus-agent-article-alist))
653 (setq gnus-newsgroup-downloadable
654 (delq article gnus-newsgroup-downloadable))))))))
656 (defun gnus-agent-catchup ()
657 "Mark all undownloaded articles as read."
660 (while gnus-newsgroup-undownloaded
661 (gnus-summary-mark-article
662 (pop gnus-newsgroup-undownloaded) gnus-catchup-mark)))
663 (gnus-summary-position-point))
666 ;;; Internal functions
669 (defun gnus-agent-save-active (method)
670 (gnus-agent-save-active-1 method 'gnus-active-to-gnus-format))
672 (defun gnus-agent-save-active-1 (method function)
673 (when (gnus-agent-method-p method)
674 (let* ((gnus-command-method method)
675 (new (gnus-make-hashtable (count-lines (point-min) (point-max))))
676 (file (gnus-agent-lib-file "active")))
677 (funcall function nil new)
678 (gnus-agent-write-active file new)
680 (nnheader-insert-file-contents file))))
682 (defun gnus-agent-write-active (file new)
683 (let ((orig (gnus-make-hashtable (count-lines (point-min) (point-max))))
684 (file (gnus-agent-lib-file "active"))
686 (when (file-exists-p file)
688 (nnheader-insert-file-contents file)
689 (gnus-active-to-gnus-format nil orig))
692 (when (and sym (boundp sym))
693 (if (and (boundp (setq osym (intern (symbol-name sym) orig)))
694 (setq elem (symbol-value osym)))
695 (setcdr elem (cdr (symbol-value sym)))
696 (set (intern (symbol-name sym) orig) (symbol-value sym)))))
698 (gnus-make-directory (file-name-directory file))
699 (let ((coding-system-for-write gnus-agent-file-coding-system))
700 ;; The hashtable contains real names of groups, no more prefix
701 ;; removing, so set `full' to `t'.
702 (gnus-write-active-file file orig t))))
704 (defun gnus-agent-save-groups (method)
705 (gnus-agent-save-active-1 method 'gnus-groups-to-gnus-format))
707 (defun gnus-agent-save-group-info (method group active)
708 (when (gnus-agent-method-p method)
709 (let* ((gnus-command-method method)
710 (coding-system-for-write nnheader-file-coding-system)
711 (file-name-coding-system nnmail-pathname-coding-system)
712 (file (gnus-agent-lib-file "active"))
714 (gnus-make-directory (file-name-directory file))
716 ;; Emacs got problem to match non-ASCII group in multibyte buffer.
717 (mm-disable-multibyte)
718 (when (file-exists-p file)
719 (nnheader-insert-file-contents file))
720 (goto-char (point-min))
721 (when (re-search-forward
722 (concat "^" (regexp-quote group) " ") nil t)
725 (narrow-to-region (match-beginning 0)
729 (setq oactive (car (nnmail-parse-active)))))
731 (insert (format "%S %d %d y\n" (intern group)
733 (or (car oactive) (car active))))
734 (goto-char (point-max))
735 (while (search-backward "\\." nil t)
738 (defun gnus-agent-group-path (group)
739 "Translate GROUP into a path."
740 (if nnmail-use-long-file-names
741 (gnus-group-real-name group)
742 (nnheader-translate-file-chars
743 (nnheader-replace-chars-in-string
744 (nnheader-replace-duplicate-chars-in-string
745 (nnheader-replace-chars-in-string
746 (gnus-group-real-name group)
753 (defun gnus-agent-method-p (method)
754 "Say whether METHOD is covered by the agent."
755 (member method gnus-agent-covered-methods))
757 (defun gnus-agent-get-function (method)
758 (if (and (not gnus-plugged)
759 (gnus-agent-method-p method))
765 ;;; History functions
767 (defun gnus-agent-history-buffer ()
768 (cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))
770 (defun gnus-agent-open-history ()
772 (push (cons (gnus-agent-method)
773 (set-buffer (gnus-get-buffer-create
774 (format " *Gnus agent %s history*"
775 (gnus-agent-method)))))
776 gnus-agent-history-buffers)
777 (mm-disable-multibyte) ;; everything is binary
780 (let ((file (gnus-agent-lib-file "history")))
781 (when (file-exists-p file)
782 (nnheader-insert-file-contents file))
783 (set (make-local-variable 'gnus-agent-file-name) file))))
785 (defun gnus-agent-save-history ()
787 (set-buffer gnus-agent-current-history)
788 (gnus-make-directory (file-name-directory gnus-agent-file-name))
789 (let ((coding-system-for-write gnus-agent-file-coding-system))
790 (write-region (1+ (point-min)) (point-max)
791 gnus-agent-file-name nil 'silent))))
793 (defun gnus-agent-close-history ()
794 (when (gnus-buffer-live-p gnus-agent-current-history)
795 (kill-buffer gnus-agent-current-history)
796 (setq gnus-agent-history-buffers
797 (delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
798 gnus-agent-history-buffers))))
800 (defun gnus-agent-enter-history (id group-arts date)
802 (set-buffer gnus-agent-current-history)
803 (goto-char (point-max))
805 (insert id "\t" (number-to-string date) "\t")
807 (insert (format "%S" (intern (caar group-arts)))
808 " " (number-to-string (cdr (pop group-arts)))
811 (while (search-backward "\\." p t)
814 (defun gnus-agent-article-in-history-p (id)
816 (set-buffer (gnus-agent-history-buffer))
817 (goto-char (point-min))
818 (search-forward (concat "\n" id "\t") nil t)))
820 (defun gnus-agent-history-path (id)
822 (set-buffer (gnus-agent-history-buffer))
823 (goto-char (point-min))
824 (when (search-forward (concat "\n" id "\t") nil t)
825 (let ((method (gnus-agent-method)))
827 (while (not (numberp (setq group (read (current-buffer)))))
828 (push (concat method "/" group) paths))
829 (nreverse paths))))))
835 (defun gnus-agent-fetch-articles (group articles)
836 "Fetch ARTICLES from GROUP and put them into the Agent."
838 ;; Prune off articles that we have already fetched.
840 (cdr (assq (car articles) gnus-agent-article-alist)))
842 (let ((arts articles))
844 (if (cdr (assq (cadr arts) gnus-agent-article-alist))
845 (setcdr arts (cddr arts))
846 (setq arts (cdr arts)))))
849 (gnus-agent-directory)
850 (gnus-agent-group-path group) "/"))
851 (date (time-to-days (current-time)))
854 (gnus-make-directory dir)
855 (gnus-message 7 "Fetching articles for %s..." group)
856 ;; Fetch the articles from the backend.
857 (if (gnus-check-backend-function 'retrieve-articles group)
858 (setq pos (gnus-retrieve-articles articles group))
861 (while (setq article (pop articles))
863 (gnus-backlog-request-article group article
865 (gnus-request-article article group))
866 (goto-char (point-max))
867 (push (cons article (point)) pos)
868 (insert-buffer-substring nntp-server-buffer)))
869 (copy-to-buffer nntp-server-buffer (point-min) (point-max))
870 (setq pos (nreverse pos)))))
871 ;; Then save these articles into the Agent.
873 (set-buffer nntp-server-buffer)
875 (narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
876 (goto-char (point-min))
877 (when (search-forward "\n\n" nil t)
878 (when (search-backward "\nXrefs: " nil t)
879 ;; Handle crossposting.
880 (skip-chars-forward "^ ")
881 (skip-chars-forward " ")
883 (while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) +")
884 (push (cons (buffer-substring (match-beginning 1)
886 (buffer-substring (match-beginning 2)
889 (goto-char (match-end 0)))
890 (gnus-agent-crosspost crosses (caar pos))))
891 (goto-char (point-min))
892 (if (not (re-search-forward "^Message-ID: *<\\([^>\n]+\\)>" nil t))
893 (setq id "No-Message-ID-in-article")
894 (setq id (buffer-substring (match-beginning 1) (match-end 1))))
895 (let ((coding-system-for-write
896 gnus-agent-file-coding-system))
897 (write-region (point-min) (point-max)
898 (concat dir (number-to-string (caar pos)))
900 (when (setq elem (assq (caar pos) gnus-agent-article-alist))
902 (gnus-agent-enter-history
903 id (or crosses (list (cons group (caar pos)))) date)
906 (gnus-agent-save-alist group)))))
908 (defun gnus-agent-crosspost (crosses article)
909 (let (gnus-agent-article-alist group alist beg end)
911 (set-buffer gnus-agent-overview-buffer)
912 (when (nnheader-find-nov-line article)
915 (setq end (progn (forward-line 1) (point)))))
917 (setq group (caar crosses))
918 (unless (setq alist (assoc group gnus-agent-group-alist))
919 (push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
920 gnus-agent-group-alist))
921 (setcdr alist (cons (cons (cdar crosses) t) (cdr alist)))
923 (set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
925 (when (= (point-max) (point-min))
926 (push (cons group (current-buffer)) gnus-agent-buffer-alist)
928 (nnheader-insert-file-contents
929 (gnus-agent-article-name ".overview" group))))
930 (nnheader-find-nov-line (string-to-number (cdar crosses)))
931 (insert (string-to-number (cdar crosses)))
932 (insert-buffer-substring gnus-agent-overview-buffer beg end))
935 (defun gnus-agent-flush-cache ()
937 (while gnus-agent-buffer-alist
938 (set-buffer (cdar gnus-agent-buffer-alist))
939 (let ((coding-system-for-write
940 gnus-agent-file-coding-system))
941 (write-region (point-min) (point-max)
942 (gnus-agent-article-name ".overview"
943 (caar gnus-agent-buffer-alist))
945 (pop gnus-agent-buffer-alist))
946 (while gnus-agent-group-alist
947 (with-temp-file (caar gnus-agent-group-alist)
948 (princ (cdar gnus-agent-group-alist))
950 (pop gnus-agent-group-alist))))
952 (defun gnus-agent-fetch-headers (group &optional force)
953 (let ((articles (gnus-list-of-unread-articles group))
954 (gnus-decode-encoded-word-function 'identity)
955 (file (gnus-agent-article-name ".overview" group)))
956 ;; Add article with marks to list of article headers we want to fetch.
957 (dolist (arts (gnus-info-marks (gnus-get-info group)))
958 (setq articles (gnus-union (gnus-uncompress-sequence (cdr arts))
960 (setq articles (sort articles '<))
961 ;; Remove known articles.
962 (when (gnus-agent-load-alist group)
963 (setq articles (gnus-sorted-intersection
965 (gnus-uncompress-range
966 (cons (1+ (caar (last gnus-agent-article-alist)))
967 (cdr (gnus-active group)))))))
969 (gnus-make-directory (nnheader-translate-file-chars
970 (file-name-directory file) t))
972 (gnus-message 7 "Fetching headers for %s..." group)
974 (set-buffer nntp-server-buffer)
975 (unless (eq 'nov (gnus-retrieve-headers articles group))
976 (nnvirtual-convert-headers))
977 ;; Save these headers for later processing.
978 (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
979 (when (file-exists-p file)
980 (gnus-agent-braid-nov group articles file))
981 (let ((coding-system-for-write
982 gnus-agent-file-coding-system))
983 (write-region (point-min) (point-max) file nil 'silent))
984 (gnus-agent-save-alist group articles nil)
985 (gnus-agent-enter-history
986 "last-header-fetched-for-session"
987 (list (cons group (nth (- (length articles) 1) articles)))
988 (time-to-days (current-time)))
991 (defsubst gnus-agent-copy-nov-line (article)
993 (set-buffer gnus-agent-overview-buffer)
995 (if (eq article (read (current-buffer)))
996 (setq e (progn (forward-line 1) (point)))
1000 (set-buffer nntp-server-buffer)
1001 (insert-buffer-substring gnus-agent-overview-buffer b e)))
1003 (defun gnus-agent-braid-nov (group articles file)
1004 (set-buffer gnus-agent-overview-buffer)
1005 (goto-char (point-min))
1006 (set-buffer nntp-server-buffer)
1008 (nnheader-insert-file-contents file)
1009 (goto-char (point-max))
1010 (if (or (= (point-min) (point-max))
1013 (< (read (current-buffer)) (car articles))))
1014 ;; We have only headers that are after the older headers,
1015 ;; so we just append them.
1017 (goto-char (point-max))
1018 (insert-buffer-substring gnus-agent-overview-buffer))
1019 ;; We do it the hard way.
1020 (nnheader-find-nov-line (car articles))
1021 (gnus-agent-copy-nov-line (car articles))
1023 (while (and articles
1025 (while (and (not (eobp))
1026 (< (read (current-buffer)) (car articles)))
1030 (gnus-agent-copy-nov-line (car articles))
1031 (setq articles (cdr articles))))
1034 (set-buffer gnus-agent-overview-buffer)
1037 (set-buffer nntp-server-buffer)
1038 (insert-buffer-substring gnus-agent-overview-buffer b e)))))
1040 (defun gnus-agent-load-alist (group &optional dir)
1041 "Load the article-state alist for GROUP."
1042 (setq gnus-agent-article-alist
1043 (gnus-agent-read-file
1045 (expand-file-name ".agentview" dir)
1046 (gnus-agent-article-name ".agentview" group)))))
1048 (defun gnus-agent-save-alist (group &optional articles state dir)
1049 "Save the article-state alist for GROUP."
1050 (let ((file-name-coding-system nnmail-pathname-coding-system))
1051 (with-temp-file (if dir
1052 (expand-file-name ".agentview" dir)
1053 (gnus-agent-article-name ".agentview" group))
1054 (princ (setq gnus-agent-article-alist
1055 (nconc gnus-agent-article-alist
1056 (mapcar (lambda (article) (cons article state))
1061 (defun gnus-agent-article-name (article group)
1062 (expand-file-name (if (stringp article) article (string-to-number article))
1063 (file-name-as-directory
1064 (expand-file-name (gnus-agent-group-path group)
1065 (gnus-agent-directory)))))
1067 (defun gnus-agent-batch-confirmation (msg)
1068 "Show error message and return t."
1069 (gnus-message 1 msg)
1073 (defun gnus-agent-batch-fetch ()
1074 "Start Gnus and fetch session."
1077 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
1078 (gnus-agent-fetch-session))
1081 (defun gnus-agent-fetch-session ()
1082 "Fetch all articles and headers that are eligible for fetching."
1084 (unless gnus-agent-covered-methods
1085 (error "No servers are covered by the Gnus agent"))
1086 (unless gnus-plugged
1087 (error "Can't fetch articles while Gnus is unplugged"))
1088 (let ((methods gnus-agent-covered-methods)
1089 groups group gnus-command-method)
1094 (setq gnus-command-method (car methods))
1095 (when (or (gnus-server-opened gnus-command-method)
1096 (gnus-open-server gnus-command-method))
1097 (setq groups (gnus-groups-from-server (car methods)))
1098 (gnus-agent-with-fetch
1099 (while (setq group (pop groups))
1100 (when (<= (gnus-group-level group) gnus-agent-handle-level)
1101 (gnus-agent-fetch-group-1 group gnus-command-method))))))
1103 (unless (funcall gnus-agent-confirmation-function
1104 (format "Error (%s). Continue? " err))
1105 (error "Cannot fetch articles into the Gnus agent.")))
1107 (unless (funcall gnus-agent-confirmation-function
1108 (format "Quit fetching session (%s). Continue? "
1110 (signal 'quit "Cannot fetch articles into the Gnus agent."))))
1112 (gnus-message 6 "Finished fetching articles into the Gnus agent"))))
1114 (defun gnus-agent-fetch-group-1 (group method)
1116 (let ((gnus-command-method method)
1117 (gnus-newsgroup-name group)
1118 gnus-newsgroup-dependencies gnus-newsgroup-headers
1119 gnus-newsgroup-scored gnus-headers gnus-score
1120 gnus-use-cache articles arts
1121 category predicate info marks score-param
1122 (gnus-summary-expunge-below gnus-summary-expunge-below)
1123 (gnus-summary-mark-below gnus-summary-mark-below)
1124 (gnus-orphan-score gnus-orphan-score)
1125 ;; Maybe some other gnus-summary local variables should also
1128 (unless (gnus-check-group group)
1129 (error "Can't open server for %s" group))
1131 (when (and (or (gnus-active group) (gnus-activate-group group))
1132 (setq articles (gnus-agent-fetch-headers group))
1133 (let ((nntp-server-buffer gnus-agent-overview-buffer))
1134 ;; Parse them and see which articles we want to fetch.
1135 (setq gnus-newsgroup-dependencies
1136 (make-vector (length articles) 0))
1137 (setq gnus-newsgroup-headers
1138 (gnus-get-newsgroup-headers-xover articles nil nil
1140 ;; `gnus-agent-overview-buffer' may be killed for
1141 ;; timeout reason. If so, recreate it.
1142 (gnus-agent-create-buffer)))
1143 (setq category (gnus-group-category group))
1146 (or (gnus-group-find-parameter group 'agent-predicate t)
1148 (if (memq (caaddr predicate) '(gnus-agent-true gnus-agent-false))
1149 ;; Simple implementation
1151 (and (eq (caaddr predicate) 'gnus-agent-true) articles))
1154 (or (gnus-group-get-parameter group 'agent-score t)
1156 ;; Translate score-param into real one
1159 ((eq score-param 'file)
1160 (setq score-param (gnus-all-score-files group)))
1161 ((stringp (car score-param)))
1163 (setq score-param (list (list score-param)))))
1165 (gnus-score-headers score-param))
1166 (while (setq gnus-headers (pop gnus-newsgroup-headers))
1168 (or (cdr (assq (mail-header-number gnus-headers)
1169 gnus-newsgroup-scored))
1170 gnus-summary-default-score))
1171 (when (funcall predicate)
1172 (push (mail-header-number gnus-headers)
1174 ;; Fetch the articles.
1176 (gnus-agent-fetch-articles group arts)))
1177 ;; Perhaps we have some additional articles to fetch.
1178 (setq arts (assq 'download (gnus-info-marks
1179 (setq info (gnus-get-info group)))))
1181 (gnus-agent-fetch-articles
1182 group (gnus-uncompress-range (cdr arts)))
1183 (setq marks (delq arts (gnus-info-marks info)))
1184 (gnus-info-set-marks info marks)
1186 (concat "(gnus-group-set-info '"
1187 (gnus-prin1-to-string info)
1191 ;;; Agent Category Mode
1194 (defvar gnus-category-mode-hook nil
1195 "Hook run in `gnus-category-mode' buffers.")
1197 (defvar gnus-category-line-format " %(%20c%): %g\n"
1198 "Format of category lines.")
1200 (defvar gnus-category-mode-line-format "Gnus: %%b"
1201 "The format specification for the category mode line.")
1203 (defvar gnus-agent-short-article 100
1204 "Articles that have fewer lines than this are short.")
1206 (defvar gnus-agent-long-article 200
1207 "Articles that have more lines than this are long.")
1209 (defvar gnus-agent-low-score 0
1210 "Articles that have a score lower than this have a low score.")
1212 (defvar gnus-agent-high-score 0
1213 "Articles that have a score higher than this have a high score.")
1216 ;;; Internal variables.
1218 (defvar gnus-category-buffer "*Agent Category*")
1220 (defvar gnus-category-line-format-alist
1221 `((?c gnus-tmp-name ?s)
1222 (?g gnus-tmp-groups ?d)))
1224 (defvar gnus-category-mode-line-format-alist
1225 `((?u user-defined ?s)))
1227 (defvar gnus-category-line-format-spec nil)
1228 (defvar gnus-category-mode-line-format-spec nil)
1230 (defvar gnus-category-mode-map nil)
1231 (put 'gnus-category-mode 'mode-class 'special)
1233 (unless gnus-category-mode-map
1234 (setq gnus-category-mode-map (make-sparse-keymap))
1235 (suppress-keymap gnus-category-mode-map)
1237 (gnus-define-keys gnus-category-mode-map
1238 "q" gnus-category-exit
1239 "k" gnus-category-kill
1240 "c" gnus-category-copy
1241 "a" gnus-category-add
1242 "p" gnus-category-edit-predicate
1243 "g" gnus-category-edit-groups
1244 "s" gnus-category-edit-score
1245 "l" gnus-category-list
1247 "\C-c\C-i" gnus-info-find-node
1248 "\C-c\C-b" gnus-bug))
1250 (defvar gnus-category-menu-hook nil
1251 "*Hook run after the creation of the menu.")
1253 (defun gnus-category-make-menu-bar ()
1254 (gnus-turn-off-edit-menu 'category)
1255 (unless (boundp 'gnus-category-menu)
1257 gnus-category-menu gnus-category-mode-map ""
1259 ["Add" gnus-category-add t]
1260 ["Kill" gnus-category-kill t]
1261 ["Copy" gnus-category-copy t]
1262 ["Edit predicate" gnus-category-edit-predicate t]
1263 ["Edit score" gnus-category-edit-score t]
1264 ["Edit groups" gnus-category-edit-groups t]
1265 ["Exit" gnus-category-exit t]))
1267 (gnus-run-hooks 'gnus-category-menu-hook)))
1269 (defun gnus-category-mode ()
1270 "Major mode for listing and editing agent categories.
1272 All normal editing commands are switched off.
1273 \\<gnus-category-mode-map>
1274 For more in-depth information on this mode, read the manual
1275 (`\\[gnus-info-find-node]').
1277 The following commands are available:
1279 \\{gnus-category-mode-map}"
1281 (when (gnus-visual-p 'category-menu 'menu)
1282 (gnus-category-make-menu-bar))
1283 (kill-all-local-variables)
1284 (gnus-simplify-mode-line)
1285 (setq major-mode 'gnus-category-mode)
1286 (setq mode-name "Category")
1287 (gnus-set-default-directory)
1288 (setq mode-line-process nil)
1289 (use-local-map gnus-category-mode-map)
1290 (buffer-disable-undo)
1291 (setq truncate-lines t)
1292 (setq buffer-read-only t)
1293 (gnus-run-hooks 'gnus-category-mode-hook))
1295 (defalias 'gnus-category-position-point 'gnus-goto-colon)
1297 (defun gnus-category-insert-line (category)
1298 (let* ((gnus-tmp-name (car category))
1299 (gnus-tmp-groups (length (cadddr category))))
1301 (gnus-add-text-properties
1305 (eval gnus-category-line-format-spec))
1306 (list 'gnus-category gnus-tmp-name))))
1308 (defun gnus-enter-category-buffer ()
1309 "Go to the Category buffer."
1311 (gnus-category-setup-buffer)
1312 (gnus-configure-windows 'category)
1313 (gnus-category-prepare))
1315 (defun gnus-category-setup-buffer ()
1316 (unless (get-buffer gnus-category-buffer)
1318 (set-buffer (gnus-get-buffer-create gnus-category-buffer))
1319 (gnus-category-mode))))
1321 (defun gnus-category-prepare ()
1322 (gnus-set-format 'category-mode)
1323 (gnus-set-format 'category t)
1324 (let ((alist gnus-category-alist)
1325 (buffer-read-only nil))
1328 (gnus-category-insert-line (pop alist)))
1329 (goto-char (point-min))
1330 (gnus-category-position-point)))
1332 (defun gnus-category-name ()
1333 (or (get-text-property (gnus-point-at-bol) 'gnus-category)
1334 (error "No category on the current line")))
1336 (defun gnus-category-read ()
1337 "Read the category alist."
1338 (setq gnus-category-alist
1339 (or (gnus-agent-read-file
1340 (nnheader-concat gnus-agent-directory "lib/categories"))
1341 (list (list 'default 'short nil nil)))))
1343 (defun gnus-category-write ()
1344 "Write the category alist."
1345 (setq gnus-category-predicate-cache nil
1346 gnus-category-group-cache nil)
1347 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
1348 (with-temp-file (nnheader-concat gnus-agent-directory "lib/categories")
1349 (prin1 gnus-category-alist (current-buffer))))
1351 (defun gnus-category-edit-predicate (category)
1352 "Edit the predicate for CATEGORY."
1353 (interactive (list (gnus-category-name)))
1354 (let ((info (assq category gnus-category-alist)))
1356 (cadr info) (format "Editing the predicate for category %s" category)
1357 `(lambda (predicate)
1358 (setcar (cdr (assq ',category gnus-category-alist)) predicate)
1359 (gnus-category-write)
1360 (gnus-category-list)))))
1362 (defun gnus-category-edit-score (category)
1363 "Edit the score expression for CATEGORY."
1364 (interactive (list (gnus-category-name)))
1365 (let ((info (assq category gnus-category-alist)))
1368 (format "Editing the score expression for category %s" category)
1370 (setcar (cddr (assq ',category gnus-category-alist)) groups)
1371 (gnus-category-write)
1372 (gnus-category-list)))))
1374 (defun gnus-category-edit-groups (category)
1375 "Edit the group list for CATEGORY."
1376 (interactive (list (gnus-category-name)))
1377 (let ((info (assq category gnus-category-alist)))
1379 (cadddr info) (format "Editing the group list for category %s" category)
1381 (setcar (nthcdr 3 (assq ',category gnus-category-alist)) groups)
1382 (gnus-category-write)
1383 (gnus-category-list)))))
1385 (defun gnus-category-kill (category)
1386 "Kill the current category."
1387 (interactive (list (gnus-category-name)))
1388 (let ((info (assq category gnus-category-alist))
1389 (buffer-read-only nil))
1391 (setq gnus-category-alist (delq info gnus-category-alist))
1392 (gnus-category-write)))
1394 (defun gnus-category-copy (category to)
1395 "Copy the current category."
1396 (interactive (list (gnus-category-name) (intern (read-string "New name: "))))
1397 (let ((info (assq category gnus-category-alist)))
1398 (push (list to (gnus-copy-sequence (cadr info))
1399 (gnus-copy-sequence (caddr info)) nil)
1400 gnus-category-alist)
1401 (gnus-category-write)
1402 (gnus-category-list)))
1404 (defun gnus-category-add (category)
1405 "Create a new category."
1406 (interactive "SCategory name: ")
1407 (when (assq category gnus-category-alist)
1408 (error "Category %s already exists" category))
1409 (push (list category 'false nil nil)
1410 gnus-category-alist)
1411 (gnus-category-write)
1412 (gnus-category-list))
1414 (defun gnus-category-list ()
1415 "List all categories."
1417 (gnus-category-prepare))
1419 (defun gnus-category-exit ()
1420 "Return to the group buffer."
1422 (kill-buffer (current-buffer))
1423 (gnus-configure-windows 'group t))
1425 ;; To avoid having 8-bit characters in the source file.
1426 (defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))
1428 (defvar gnus-category-predicate-alist
1429 '((spam . gnus-agent-spam-p)
1430 (short . gnus-agent-short-p)
1431 (long . gnus-agent-long-p)
1432 (low . gnus-agent-low-scored-p)
1433 (high . gnus-agent-high-scored-p)
1434 (true . gnus-agent-true)
1435 (false . gnus-agent-false))
1436 "Mapping from short score predicate symbols to predicate functions.")
1438 (defun gnus-agent-spam-p ()
1439 "Say whether an article is spam or not."
1440 (unless gnus-agent-spam-hashtb
1441 (setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
1442 (if (not (equal (mail-header-references gnus-headers) ""))
1444 (let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
1446 (gnus-gethash string gnus-agent-spam-hashtb)
1447 (gnus-sethash string t gnus-agent-spam-hashtb)))))
1449 (defun gnus-agent-short-p ()
1450 "Say whether an article is short or not."
1451 (< (mail-header-lines gnus-headers) gnus-agent-short-article))
1453 (defun gnus-agent-long-p ()
1454 "Say whether an article is long or not."
1455 (> (mail-header-lines gnus-headers) gnus-agent-long-article))
1457 (defun gnus-agent-low-scored-p ()
1458 "Say whether an article has a low score or not."
1459 (< gnus-score gnus-agent-low-score))
1461 (defun gnus-agent-high-scored-p ()
1462 "Say whether an article has a high score or not."
1463 (> gnus-score gnus-agent-high-score))
1465 (defun gnus-category-make-function (cat)
1466 "Make a function from category CAT."
1467 `(lambda () ,(gnus-category-make-function-1 cat)))
1469 (defun gnus-agent-true ()
1473 (defun gnus-agent-false ()
1477 (defun gnus-category-make-function-1 (cat)
1478 "Make a function from category CAT."
1480 ;; Functions are just returned as is.
1482 (gnus-functionp cat))
1483 `(,(or (cdr (assq cat gnus-category-predicate-alist))
1485 ;; More complex category.
1488 ((memq (car cat) '(& and))
1490 ((memq (car cat) '(| or))
1492 ((memq (car cat) gnus-category-not)
1494 ,@(mapcar 'gnus-category-make-function-1 (cdr cat))))
1496 (error "Unknown category type: %s" cat))))
1498 (defun gnus-get-predicate (predicate)
1499 "Return the predicate for CATEGORY."
1500 (or (cdr (assoc predicate gnus-category-predicate-cache))
1501 (cdar (push (cons predicate
1502 (gnus-category-make-function predicate))
1503 gnus-category-predicate-cache))))
1505 (defun gnus-group-category (group)
1506 "Return the category GROUP belongs to."
1507 (unless gnus-category-group-cache
1508 (setq gnus-category-group-cache (gnus-make-hashtable 1000))
1509 (let ((cs gnus-category-alist)
1511 (while (setq cat (pop cs))
1512 (setq groups (cadddr cat))
1514 (gnus-sethash (pop groups) cat gnus-category-group-cache)))))
1515 (or (gnus-gethash group gnus-category-group-cache)
1516 (assq 'default gnus-category-alist)))
1518 (defun gnus-agent-expire ()
1519 "Expire all old articles."
1521 (let ((methods gnus-agent-covered-methods)
1522 (day (- (time-to-days (current-time)) gnus-agent-expire-days))
1523 gnus-command-method sym group articles
1524 history overview file histories elem art nov-file low info
1525 unreads marked article orig lowest highest)
1527 (setq overview (gnus-get-buffer-create " *expire overview*"))
1528 (while (setq gnus-command-method (pop methods))
1529 (when (file-exists-p (gnus-agent-lib-file "active"))
1531 (nnheader-insert-file-contents (gnus-agent-lib-file "active"))
1532 (gnus-active-to-gnus-format
1534 (setq orig (gnus-make-hashtable
1535 (count-lines (point-min) (point-max))))))
1536 (let ((expiry-hashtb (gnus-make-hashtable 1023)))
1537 (gnus-agent-open-history)
1539 (setq gnus-agent-current-history
1540 (setq history (gnus-agent-history-buffer))))
1541 (goto-char (point-min))
1542 (when (> (buffer-size) 1)
1543 (goto-char (point-min))
1545 (skip-chars-forward "^\t")
1546 (if (let ((fetch-date (read (current-buffer))))
1547 (if (numberp fetch-date)
1549 ;; History file is corrupted.
1552 (format "File %s is corrupted!"
1553 (gnus-agent-lib-file "history")))
1557 ;; New article; we don't expire it.
1559 ;; Old article. Schedule it for possible nuking.
1561 (setq sym (let ((obarray expiry-hashtb) s)
1562 (setq s (read (current-buffer)))
1563 (if (stringp s) (intern s) s)))
1565 (set sym (cons (cons (read (current-buffer)) (point))
1566 (symbol-value sym)))
1567 (set sym (list (cons (read (current-buffer)) (point)))))
1568 (skip-chars-forward " "))
1570 ;; We now have all articles that can possibly be expired.
1573 (setq group (symbol-name sym)
1574 articles (sort (symbol-value sym) 'car-less-than-car)
1575 low (car (gnus-active group))
1576 info (gnus-get-info group)
1577 unreads (ignore-errors
1578 (gnus-list-of-unread-articles group))
1580 (gnus-uncompress-range
1581 (cdr (assq 'tick (gnus-info-marks info))))
1582 (gnus-uncompress-range
1584 (gnus-info-marks info)))))
1585 nov-file (gnus-agent-article-name ".overview" group)
1588 (gnus-agent-load-alist group)
1589 (gnus-message 5 "Expiring articles in %s" group)
1590 (set-buffer overview)
1592 (when (file-exists-p nov-file)
1593 (nnheader-insert-file-contents nov-file))
1594 (goto-char (point-min))
1596 (while (setq elem (pop articles))
1597 (setq article (car elem))
1598 (when (or (null low)
1600 gnus-agent-expire-all
1601 (and (not (memq article unreads))
1602 (not (memq article marked))))
1603 ;; Find and nuke the NOV line.
1604 (while (and (not (eobp))
1606 (setq art (read (current-buffer)))))
1608 (if (and (numberp art)
1610 (gnus-agent-article-name
1611 (number-to-string art) group)))
1617 ;; Remove old NOV lines that have no articles.
1618 (gnus-delete-line)))
1623 ;; Nuke the article.
1624 (when (file-exists-p
1625 (setq file (gnus-agent-article-name
1626 (number-to-string article)
1629 ;; Schedule the history line for nuking.
1630 (push (cdr elem) histories)))
1631 (gnus-make-directory (file-name-directory nov-file))
1632 (let ((coding-system-for-write
1633 gnus-agent-file-coding-system))
1634 (write-region (point-min) (point-max) nov-file nil 'silent))
1635 ;; Delete the unwanted entries in the alist.
1636 (setq gnus-agent-article-alist
1637 (sort gnus-agent-article-alist 'car-less-than-car))
1638 (let* ((alist gnus-agent-article-alist)
1639 (prev (cons nil alist))
1643 (<= (caar alist) article))
1644 (if (or (not (cdar alist))
1646 (gnus-agent-article-name
1651 (push (caar alist) expired)
1652 (setcdr prev (setq alist (cdr alist))))
1654 alist (cdr alist))))
1655 (setq gnus-agent-article-alist (cdr first))
1656 (gnus-agent-save-alist group)
1657 ;; Mark all articles up to the first article
1658 ;; in `gnus-article-alist' as read.
1659 (when (and info (caar gnus-agent-article-alist))
1660 (setcar (nthcdr 2 info)
1663 (cons 1 (- (caar gnus-agent-article-alist) 1)))))
1664 ;; Maybe everything has been expired from `gnus-article-alist'
1665 ;; and so the above marking as read could not be conducted,
1666 ;; or there are expired article within the range of the alist.
1669 (or (not (caar gnus-agent-article-alist))
1671 (caar gnus-agent-article-alist))))
1672 (setcar (nthcdr 2 info)
1675 (nreverse expired))))
1677 (concat "(gnus-group-set-info '"
1678 (gnus-prin1-to-string info)
1681 (if (gnus-gethash group orig)
1682 (setcar (gnus-gethash group orig) lowest)
1683 (gnus-sethash group (cons lowest highest) orig))))
1685 (set-buffer history)
1686 (setq histories (nreverse (sort histories '<)))
1688 (goto-char (pop histories))
1690 (gnus-agent-save-history)
1691 (gnus-agent-close-history)
1692 (gnus-write-active-file
1693 (gnus-agent-lib-file "active") orig))
1694 (gnus-message 4 "Expiry...done")))))))
1697 (defun gnus-agent-batch ()
1699 (let ((init-file-user "")
1700 (gnus-always-read-dribble-file t))
1702 (gnus-group-send-drafts)
1703 (gnus-agent-fetch-session))
1705 (provide 'gnus-agent)
1707 ;;; gnus-agent.el ends here