1 ;;; gnus-agent.el --- unplugged support for Semi-gnus
2 ;; Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 ;; Free Software Foundation, Inc.
5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
6 ;; Tatsuya Ichikawa <t-ichi@po.shiojiri.ne.jp>
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 ;; Boston, MA 02111-1307, USA.
28 (eval-when-compile (require 'cl))
29 (eval-when-compile (require 'gnus-clfns))
40 (if (featurep 'xemacs)
43 (require 'gnus-group))
46 (autoload 'gnus-server-update-server "gnus-srvr")
47 (autoload 'gnus-agent-customize-category "gnus-cus")
50 (defcustom gnus-agent-directory (nnheader-concat gnus-directory "agent/")
51 "Where the Gnus agent will store its files."
55 (defcustom gnus-agent-plugged-hook nil
56 "Hook run when plugging into the network."
60 (defcustom gnus-agent-unplugged-hook nil
61 "Hook run when unplugging from the network."
65 (defcustom gnus-agent-fetched-hook nil
66 "Hook run when finished fetching articles."
70 (defcustom gnus-agent-handle-level gnus-level-subscribed
71 "Groups on levels higher than this variable will be ignored by the Agent."
75 (defcustom gnus-agent-expire-days 7
76 "Read articles older than this will be expired.
77 This can also be a list of regexp/day pairs. The regexps will be
78 matched against group names."
80 :type '(choice (number :tag "days")
81 (sexp :tag "List" nil)))
83 (defcustom gnus-agent-expire-all nil
84 "If non-nil, also expire unread, ticked and dormant articles.
85 If nil, only read articles will be expired."
89 (defcustom gnus-agent-group-mode-hook nil
90 "Hook run in Agent group minor modes."
94 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
95 (when (featurep 'xemacs)
96 (add-hook 'gnus-agent-group-mode-hook 'gnus-xmas-agent-group-menu-add))
98 (defcustom gnus-agent-summary-mode-hook nil
99 "Hook run in Agent summary minor modes."
103 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
104 (when (featurep 'xemacs)
105 (add-hook 'gnus-agent-summary-mode-hook 'gnus-xmas-agent-summary-menu-add))
107 (defcustom gnus-agent-server-mode-hook nil
108 "Hook run in Agent summary minor modes."
112 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
113 (when (featurep 'xemacs)
114 (add-hook 'gnus-agent-server-mode-hook 'gnus-xmas-agent-server-menu-add))
116 (defcustom gnus-agent-confirmation-function 'y-or-n-p
117 "Function to confirm when error happens."
122 (defcustom gnus-agent-large-newsgroup nil
123 "*The number of articles which indicates a large newsgroup.
124 If the number of unread articles exceeds it, The number of articles to be
125 fetched will be limited to it. If not a positive integer, never consider it."
127 :type '(choice (const nil)
128 (integer :tag "Number")))
130 (defcustom gnus-agent-synchronize-flags 'ask
131 "Indicate if flags are synchronized when you plug in.
132 If this is `ask' the hook will query the user."
134 :type '(choice (const :tag "Always" t)
135 (const :tag "Never" nil)
136 (const :tag "Ask" ask))
139 (defcustom gnus-agent-go-online 'ask
140 "Indicate if offline servers go online when you plug in.
141 If this is `ask' the hook will query the user."
143 :type '(choice (const :tag "Always" t)
144 (const :tag "Never" nil)
145 (const :tag "Ask" ask))
148 (defcustom gnus-agent-mark-unread-after-downloaded t
149 "Indicate whether to mark articles unread after downloaded."
154 (defcustom gnus-agent-download-marks '(download)
155 "Marks for downloading."
157 :type '(repeat (symbol :tag "Mark"))
160 (defcustom gnus-agent-consider-all-articles nil
161 "If non-nil, consider also the read articles for downloading."
166 (defcustom gnus-agent-max-fetch-size 10000000 ;; 10 Mb
167 "Chunk size for `gnus-agent-fetch-session'.
168 The function will split its article fetches into chunks smaller than
173 (defcustom gnus-agent-enable-expiration 'ENABLE
174 "The default expiration state for each group.
175 When set to ENABLE, the default, `gnus-agent-expire' will expire old
176 contents from a group's local storage. This value may be overridden
177 to disable expiration in specific categories, topics, and groups. Of
178 course, you could change gnus-agent-enable-expiration to DISABLE then
179 enable expiration per categories, topics, and groups."
181 :type '(radio (const :format "Enable " ENABLE)
182 (const :format "Disable " DISABLE)))
184 (defcustom gnus-agent-expire-unagentized-dirs t
185 "Have gnus-agent-expire scan the directories under
186 \(gnus-agent-directory) for groups that are no longer agentized. When
187 found, offer to remove them.")
189 ;;; Internal variables
191 (defvar gnus-agent-history-buffers nil)
192 (defvar gnus-agent-buffer-alist nil)
193 (defvar gnus-agent-article-alist nil
194 "An assoc list identifying the articles whose headers have been fetched.
195 If successfully fetched, these headers will be stored in the group's overview
196 file. The key of each assoc pair is the article ID, the value of each assoc
197 pair is a flag indicating whether the identified article has been downloaded
198 \(gnus-agent-fetch-articles sets the value to the day of the download).
200 1) The last element of this list can not be expired as some
201 routines (for example, get-agent-fetch-headers) use the last
202 value to track which articles have had their headers retrieved.
203 2) The function `gnus-agent-regenerate' may destructively modify the value.")
204 (defvar gnus-agent-group-alist nil)
205 (defvar gnus-category-alist nil)
206 (defvar gnus-agent-current-history nil)
207 (defvar gnus-agent-overview-buffer nil)
208 (defvar gnus-category-predicate-cache nil)
209 (defvar gnus-category-group-cache nil)
210 (defvar gnus-agent-spam-hashtb nil)
211 (defvar gnus-agent-file-name nil)
212 (defvar gnus-agent-send-mail-function nil)
213 (defvar gnus-agent-file-coding-system 'raw-text)
214 (defvar gnus-agent-file-loading-cache nil)
215 (defvar gnus-agent-file-header-cache nil)
217 (defvar gnus-agent-auto-agentize-methods '(nntp nnimap)
218 "Initially, all servers from these methods are agentized.
219 The user may remove or add servers using the Server buffer. See Info
220 node `(gnus)Server Buffer'.")
223 (defvar gnus-headers)
230 (defun gnus-open-agent ()
232 (gnus-agent-read-servers)
234 (gnus-agent-create-buffer)
235 (add-hook 'gnus-group-mode-hook 'gnus-agent-mode)
236 (add-hook 'gnus-summary-mode-hook 'gnus-agent-mode)
237 (add-hook 'gnus-server-mode-hook 'gnus-agent-mode))
239 (defun gnus-agent-create-buffer ()
240 (if (gnus-buffer-live-p gnus-agent-overview-buffer)
242 (setq gnus-agent-overview-buffer
243 (gnus-get-buffer-create " *Gnus agent overview*"))
244 (with-current-buffer gnus-agent-overview-buffer
245 (set-buffer-multibyte t))
248 (gnus-add-shutdown 'gnus-close-agent 'gnus)
250 (defun gnus-close-agent ()
251 (setq gnus-category-predicate-cache nil
252 gnus-category-group-cache nil
253 gnus-agent-spam-hashtb nil)
254 (gnus-kill-buffer gnus-agent-overview-buffer))
257 ;;; Utility functions
260 (defun gnus-agent-read-file (file)
261 "Load FILE and do a `read' there."
264 (nnheader-insert-file-contents file)
265 (goto-char (point-min))
266 (read (current-buffer)))))
268 (defsubst gnus-agent-method ()
269 (concat (symbol-name (car gnus-command-method)) "/"
270 (if (equal (cadr gnus-command-method) "")
272 (cadr gnus-command-method))))
274 (defsubst gnus-agent-directory ()
275 "The name of the Gnus agent directory."
276 (nnheader-concat gnus-agent-directory
277 (nnheader-translate-file-chars (gnus-agent-method)) "/"))
279 (defun gnus-agent-lib-file (file)
280 "The full name of the Gnus agent library FILE."
281 (expand-file-name file
282 (file-name-as-directory
283 (expand-file-name "agent.lib" (gnus-agent-directory)))))
285 (defun gnus-agent-cat-set-property (category property value)
287 (setcdr (or (assq property category)
288 (let ((cell (cons property nil)))
289 (setcdr category (cons cell (cdr category)))
291 (let ((category category))
292 (while (cond ((eq property (caadr category))
293 (setcdr category (cddr category))
296 (setq category (cdr category)))))))
299 (defmacro gnus-agent-cat-defaccessor (name prop-name)
300 "Define accessor and setter methods for manipulating a list of the form
301 \(NAME (PROPERTY1 VALUE1) ... (PROPERTY_N VALUE_N)).
302 Given the call (gnus-agent-cat-defaccessor func PROPERTY1), the list may be
303 manipulated as follows:
304 (func LIST): Returns VALUE1
305 (setf (func LIST) NEW_VALUE1): Replaces VALUE1 with NEW_VALUE1."
306 `(progn (defmacro ,name (category)
307 (list (quote cdr) (list (quote assq)
308 (quote (quote ,prop-name)) category)))
310 (define-setf-method ,name (category)
311 (let* ((--category--temp-- (gensym "--category--"))
312 (--value--temp-- (gensym "--value--")))
313 (list (list --category--temp--) ; temporary-variables
314 (list category) ; value-forms
315 (list --value--temp--) ; store-variables
316 (let* ((category --category--temp--) ; store-form
317 (value --value--temp--))
318 (list (quote gnus-agent-cat-set-property)
320 (quote (quote ,prop-name))
322 (list (quote ,name) --category--temp--) ; access-form
325 (defmacro gnus-agent-cat-name (category)
328 (gnus-agent-cat-defaccessor
329 gnus-agent-cat-days-until-old agent-days-until-old)
330 (gnus-agent-cat-defaccessor
331 gnus-agent-cat-enable-expiration agent-enable-expiration)
332 (gnus-agent-cat-defaccessor
333 gnus-agent-cat-groups agent-groups)
334 (gnus-agent-cat-defaccessor
335 gnus-agent-cat-high-score agent-high-score)
336 (gnus-agent-cat-defaccessor
337 gnus-agent-cat-length-when-long agent-length-when-long)
338 (gnus-agent-cat-defaccessor
339 gnus-agent-cat-length-when-short agent-length-when-short)
340 (gnus-agent-cat-defaccessor
341 gnus-agent-cat-low-score agent-low-score)
342 (gnus-agent-cat-defaccessor
343 gnus-agent-cat-predicate agent-predicate)
344 (gnus-agent-cat-defaccessor
345 gnus-agent-cat-score-file agent-score-file)
347 (defsetf gnus-agent-cat-groups (category) (groups)
348 (list 'gnus-agent-set-cat-groups category groups))
350 (defun gnus-agent-set-cat-groups (category groups)
351 (unless (eq groups 'ignore)
353 (old-g (gnus-agent-cat-groups category)))
354 (cond ((eq new-g old-g)
355 ;; gnus-agent-add-group is fiddling with the group
356 ;; list. Still, Im done.
359 ((eq new-g (cdr old-g))
360 ;; gnus-agent-add-group is fiddling with the group list
361 (setcdr (or (assq 'agent-groups category)
362 (let ((cell (cons 'agent-groups nil)))
363 (setcdr category (cons cell (cdr category)))
366 (let ((groups groups))
368 (let* ((group (pop groups))
369 (old-category (gnus-group-category group)))
370 (if (eq category old-category)
372 (setf (gnus-agent-cat-groups old-category)
373 (delete group (gnus-agent-cat-groups
375 ;; Purge cache as preceeding loop invalidated it.
376 (setq gnus-category-group-cache nil))
378 (setcdr (or (assq 'agent-groups category)
379 (let ((cell (cons 'agent-groups nil)))
380 (setcdr category (cons cell (cdr category)))
383 (defsubst gnus-agent-cat-make (name)
384 (list name '(agent-predicate . false)))
386 ;;; Fetching setup functions.
388 (defun gnus-agent-start-fetch ()
389 "Initialize data structures for efficient fetching."
390 (gnus-agent-create-buffer))
392 (defun gnus-agent-stop-fetch ()
393 "Save all data structures and clean up."
394 (setq gnus-agent-spam-hashtb nil)
396 (set-buffer nntp-server-buffer)
399 (defmacro gnus-agent-with-fetch (&rest forms)
402 (let ((gnus-agent-fetching t))
403 (gnus-agent-start-fetch)
405 (gnus-agent-stop-fetch)))
407 (put 'gnus-agent-with-fetch 'lisp-indent-function 0)
408 (put 'gnus-agent-with-fetch 'edebug-form-spec '(body))
410 (defmacro gnus-agent-append-to-list (tail value)
411 `(setq ,tail (setcdr ,tail (cons ,value nil))))
413 (defmacro gnus-agent-message (level &rest args)
414 `(if (<= ,level gnus-verbose)
421 (defvar gnus-agent-mode-hook nil
422 "Hook run when installing agent mode.")
424 (defvar gnus-agent-mode nil)
425 (defvar gnus-agent-mode-status '(gnus-agent-mode " Plugged"))
427 (defun gnus-agent-mode ()
428 "Minor mode for providing a agent support in Gnus buffers."
429 (let* ((buffer (progn (string-match "^gnus-\\(.*\\)-mode$"
430 (symbol-name major-mode))
431 (match-string 1 (symbol-name major-mode))))
432 (mode (intern (format "gnus-agent-%s-mode" buffer))))
433 (set (make-local-variable 'gnus-agent-mode) t)
435 (set (make-local-variable mode) t)
437 (when (gnus-visual-p 'agent-menu 'menu)
438 (funcall (intern (format "gnus-agent-%s-make-menu-bar" buffer))))
439 (unless (assq 'gnus-agent-mode minor-mode-alist)
440 (push gnus-agent-mode-status minor-mode-alist))
441 (unless (assq mode minor-mode-map-alist)
442 (push (cons mode (symbol-value (intern (format "gnus-agent-%s-mode-map"
444 minor-mode-map-alist))
445 (when (eq major-mode 'gnus-group-mode)
446 (let ((init-plugged gnus-plugged))
447 ;; g-a-t-p does nothing when gnus-plugged isn't changed.
448 ;; Therefore, make certain that the current value does not
449 ;; match the desired initial value.
450 (setq gnus-plugged :unknown)
451 (gnus-agent-toggle-plugged init-plugged)))
452 (gnus-run-hooks 'gnus-agent-mode-hook
453 (intern (format "gnus-agent-%s-mode-hook" buffer)))))
455 (defvar gnus-agent-group-mode-map (make-sparse-keymap))
456 (gnus-define-keys gnus-agent-group-mode-map
457 "Ju" gnus-agent-fetch-groups
458 "Jc" gnus-enter-category-buffer
459 "Jj" gnus-agent-toggle-plugged
460 "Js" gnus-agent-fetch-session
461 "JY" gnus-agent-synchronize-flags
462 "JS" gnus-group-send-queue
463 "Ja" gnus-agent-add-group
464 "Jr" gnus-agent-remove-group
465 "Jo" gnus-agent-toggle-group-plugged)
467 (defun gnus-agent-group-make-menu-bar ()
468 (unless (boundp 'gnus-agent-group-menu)
470 gnus-agent-group-menu gnus-agent-group-mode-map ""
472 ["Toggle plugged" gnus-agent-toggle-plugged t]
473 ["Toggle group plugged" gnus-agent-toggle-group-plugged t]
474 ["List categories" gnus-enter-category-buffer t]
475 ["Add (current) group to category" gnus-agent-add-group t]
476 ["Remove (current) group from category" gnus-agent-remove-group t]
477 ["Send queue" gnus-group-send-queue gnus-plugged]
479 ["All" gnus-agent-fetch-session gnus-plugged]
480 ["Group" gnus-agent-fetch-group gnus-plugged])
481 ["Synchronize flags" gnus-agent-synchronize-flags t]
484 (defvar gnus-agent-summary-mode-map (make-sparse-keymap))
485 (gnus-define-keys gnus-agent-summary-mode-map
486 "Jj" gnus-agent-toggle-plugged
487 "Ju" gnus-agent-summary-fetch-group
488 "JS" gnus-agent-fetch-group
489 "Js" gnus-agent-summary-fetch-series
490 "J#" gnus-agent-mark-article
491 "J\M-#" gnus-agent-unmark-article
492 "@" gnus-agent-toggle-mark
493 "Jc" gnus-agent-catchup)
495 (defun gnus-agent-summary-make-menu-bar ()
496 (unless (boundp 'gnus-agent-summary-menu)
498 gnus-agent-summary-menu gnus-agent-summary-mode-map ""
500 ["Toggle plugged" gnus-agent-toggle-plugged t]
501 ["Mark as downloadable" gnus-agent-mark-article t]
502 ["Unmark as downloadable" gnus-agent-unmark-article t]
503 ["Toggle mark" gnus-agent-toggle-mark t]
504 ["Fetch downloadable" gnus-agent-summary-fetch-group t]
505 ["Catchup undownloaded" gnus-agent-catchup t]))))
507 (defvar gnus-agent-server-mode-map (make-sparse-keymap))
508 (gnus-define-keys gnus-agent-server-mode-map
509 "Jj" gnus-agent-toggle-plugged
510 "Ja" gnus-agent-add-server
511 "Jr" gnus-agent-remove-server)
513 (defun gnus-agent-server-make-menu-bar ()
514 (unless (boundp 'gnus-agent-server-menu)
516 gnus-agent-server-menu gnus-agent-server-mode-map ""
518 ["Toggle plugged" gnus-agent-toggle-plugged t]
519 ["Add" gnus-agent-add-server t]
520 ["Remove" gnus-agent-remove-server t]))))
522 (defun gnus-agent-make-mode-line-string (string mouse-button mouse-func)
523 (if (and (fboundp 'propertize)
524 (fboundp 'make-mode-line-mouse-map))
525 (propertize string 'local-map
526 (make-mode-line-mouse-map mouse-button mouse-func))
529 (defun gnus-agent-toggle-plugged (set-to)
530 "Toggle whether Gnus is unplugged or not."
531 (interactive (list (not gnus-plugged)))
532 (cond ((eq set-to gnus-plugged)
535 (setq gnus-plugged set-to)
536 (gnus-run-hooks 'gnus-agent-plugged-hook)
537 (setcar (cdr gnus-agent-mode-status)
538 (gnus-agent-make-mode-line-string " Plugged"
540 'gnus-agent-toggle-plugged))
541 (gnus-agent-go-online gnus-agent-go-online)
542 (gnus-agent-possibly-synchronize-flags))
544 (gnus-agent-close-connections)
545 (setq gnus-plugged set-to)
546 (gnus-run-hooks 'gnus-agent-unplugged-hook)
547 (setcar (cdr gnus-agent-mode-status)
548 (gnus-agent-make-mode-line-string " Unplugged"
550 'gnus-agent-toggle-plugged))))
551 (force-mode-line-update)
552 (set-buffer-modified-p t))
554 (defmacro gnus-agent-while-plugged (&rest body)
555 `(let ((original-gnus-plugged gnus-plugged))
557 (progn (gnus-agent-toggle-plugged t)
559 (gnus-agent-toggle-plugged original-gnus-plugged))))
561 (put 'gnus-agent-while-plugged 'lisp-indent-function 0)
562 (put 'gnus-agent-while-plugged 'edebug-form-spec '(body))
564 (defun gnus-agent-close-connections ()
565 "Close all methods covered by the Gnus agent."
566 (let ((methods gnus-agent-covered-methods))
568 (gnus-close-server (pop methods)))))
571 (defun gnus-unplugged ()
572 "Start Gnus unplugged."
574 (setq gnus-plugged nil)
578 (defun gnus-plugged ()
579 "Start Gnus plugged."
581 (setq gnus-plugged t)
585 (defun gnus-slave-unplugged (&optional arg)
586 "Read news as a slave unplugged."
588 (setq gnus-plugged nil)
589 (gnus arg nil 'slave))
592 (defun gnus-agentize ()
593 "Allow Gnus to be an offline newsreader.
594 The normal usage of this command is to put the following as the
595 last form in your `.gnus.el' file:
599 This will modify the `gnus-setup-news-hook', and
600 `message-send-mail-real-function' variables, and install the Gnus agent
601 minor mode in all Gnus buffers."
604 (add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
605 (unless gnus-agent-send-mail-function
606 (setq gnus-agent-send-mail-function
607 (or message-send-mail-real-function
608 message-send-mail-function)
609 message-send-mail-real-function 'gnus-agent-send-mail))
611 (unless gnus-agent-covered-methods
614 (if (memq (car (gnus-server-to-method server))
615 gnus-agent-auto-agentize-methods)
616 (setq gnus-agent-covered-methods
617 (cons (gnus-server-to-method server)
618 gnus-agent-covered-methods ))))
619 (append (list gnus-select-method) gnus-secondary-select-methods))))
621 (defun gnus-agent-queue-setup ()
622 "Make sure the queue group exists."
623 (unless (gnus-gethash "nndraft:queue" gnus-newsrc-hashtb)
624 (gnus-request-create-group "queue" '(nndraft ""))
625 (let ((gnus-level-default-subscribed 1))
626 (gnus-subscribe-group "nndraft:queue" nil '(nndraft "")))
627 (gnus-group-set-parameter
628 "nndraft:queue" 'gnus-dummy '((gnus-draft-mode)))))
630 (defun gnus-agent-send-mail ()
632 (funcall gnus-agent-send-mail-function)
633 (goto-char (point-min))
635 (concat "^" (regexp-quote mail-header-separator) "\n"))
637 (gnus-agent-insert-meta-information 'mail)
638 (gnus-request-accept-article "nndraft:queue" nil t t)))
640 (defun gnus-agent-insert-meta-information (type &optional method)
641 "Insert meta-information into the message that says how it's to be posted.
642 TYPE can be either `mail' or `news'. If the latter, then METHOD can
645 (message-remove-header gnus-agent-meta-information-header)
646 (goto-char (point-min))
647 (insert gnus-agent-meta-information-header ": "
648 (symbol-name type) " " (format "%S" method)
651 (while (search-backward "\n" nil t)
652 (replace-match "\\n" t t))))
654 (defun gnus-agent-restore-gcc ()
655 "Restore GCC field from saved header."
657 (goto-char (point-min))
658 (while (re-search-forward (concat gnus-agent-gcc-header ":") nil t)
659 (replace-match "Gcc:" 'fixedcase))))
661 (defun gnus-agent-any-covered-gcc ()
663 (message-narrow-to-headers)
664 (let* ((gcc (mail-fetch-field "gcc" nil t))
666 (mapcar 'gnus-inews-group-method
667 (message-unquote-tokens
668 (message-tokenize-header
671 (while (and (not covered) methods)
672 (setq covered (gnus-agent-method-p (car methods))
673 methods (cdr methods)))
677 (defun gnus-agent-possibly-save-gcc ()
678 "Save GCC if Gnus is unplugged."
679 (when (and (not gnus-plugged) (gnus-agent-any-covered-gcc))
681 (goto-char (point-min))
682 (let ((case-fold-search t))
683 (while (re-search-forward "^gcc:" nil t)
684 (replace-match (concat gnus-agent-gcc-header ":") 'fixedcase))))))
686 (defun gnus-agent-possibly-do-gcc ()
687 "Do GCC if Gnus is plugged."
688 (when (or gnus-plugged (not (gnus-agent-any-covered-gcc)))
689 (gnus-inews-do-gcc)))
692 ;;; Group mode commands
695 (defun gnus-agent-fetch-groups (n)
696 "Put all new articles in the current groups into the Agent."
699 (error "Groups can't be fetched when Gnus is unplugged"))
700 (gnus-group-iterate n 'gnus-agent-fetch-group))
702 (defun gnus-agent-fetch-group (&optional group)
703 "Put all new articles in GROUP into the Agent."
704 (interactive (list (gnus-group-group-name)))
705 (setq group (or group gnus-newsgroup-name))
707 (error "No group on the current line"))
709 (gnus-agent-while-plugged
710 (let ((gnus-command-method (gnus-find-method-for-group group)))
711 (gnus-agent-with-fetch
712 (gnus-agent-fetch-group-1 group gnus-command-method)
713 (gnus-message 5 "Fetching %s...done" group)))))
715 (defun gnus-agent-add-group (category arg)
716 "Add the current group to an agent category."
722 (mapcar (lambda (cat) (list (symbol-name (car cat))))
726 (let ((cat (assq category gnus-category-alist))
728 (gnus-group-iterate arg
730 (when (gnus-agent-cat-groups (setq c (gnus-group-category group)))
731 (setf (gnus-agent-cat-groups c)
732 (delete group (gnus-agent-cat-groups c))))
733 (push group groups)))
734 (setf (gnus-agent-cat-groups cat)
735 (nconc (gnus-agent-cat-groups cat) groups))
736 (gnus-category-write)))
738 (defun gnus-agent-remove-group (arg)
739 "Remove the current group from its agent category, if any."
742 (gnus-group-iterate arg
744 (when (gnus-agent-cat-groups (setq c (gnus-group-category group)))
745 (setf (gnus-agent-cat-groups c)
746 (delete group (gnus-agent-cat-groups c))))))
747 (gnus-category-write)))
749 (defun gnus-agent-synchronize-flags ()
750 "Synchronize unplugged flags with servers."
753 (dolist (gnus-command-method gnus-agent-covered-methods)
754 (when (file-exists-p (gnus-agent-lib-file "flags"))
755 (gnus-agent-synchronize-flags-server gnus-command-method)))))
757 (defun gnus-agent-possibly-synchronize-flags ()
758 "Synchronize flags according to `gnus-agent-synchronize-flags'."
761 (dolist (gnus-command-method gnus-agent-covered-methods)
762 (when (file-exists-p (gnus-agent-lib-file "flags"))
763 (gnus-agent-possibly-synchronize-flags-server gnus-command-method)))))
765 (defun gnus-agent-synchronize-flags-server (method)
766 "Synchronize flags set when unplugged for server."
767 (let ((gnus-command-method method))
768 (when (file-exists-p (gnus-agent-lib-file "flags"))
769 (set-buffer (get-buffer-create " *Gnus Agent flag synchronize*"))
771 (nnheader-insert-file-contents (gnus-agent-lib-file "flags"))
772 (if (null (gnus-check-server gnus-command-method))
773 (gnus-message 1 "Couldn't open server %s" (nth 1 gnus-command-method))
775 (if (null (eval (read (current-buffer))))
777 (write-file (gnus-agent-lib-file "flags"))
778 (error "Couldn't set flags from file %s"
779 (gnus-agent-lib-file "flags"))))
780 (delete-file (gnus-agent-lib-file "flags")))
783 (defun gnus-agent-possibly-synchronize-flags-server (method)
784 "Synchronize flags for server according to `gnus-agent-synchronize-flags'."
785 (when (or (and gnus-agent-synchronize-flags
786 (not (eq gnus-agent-synchronize-flags 'ask)))
787 (and (eq gnus-agent-synchronize-flags 'ask)
788 (gnus-y-or-n-p (format "Synchronize flags on server `%s'? "
790 (gnus-agent-synchronize-flags-server method)))
793 ;;; Server mode commands
796 (defun gnus-agent-add-server (server)
797 "Enroll SERVER in the agent program."
798 (interactive (list (gnus-server-server-name)))
800 (error "No server on the current line"))
801 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
802 (when (gnus-agent-method-p method)
803 (error "Server already in the agent program"))
804 (push method gnus-agent-covered-methods)
805 (gnus-server-update-server server)
806 (gnus-agent-write-servers)
807 (gnus-message 1 "Entered %s into the Agent" server)))
809 (defun gnus-agent-remove-server (server)
810 "Remove SERVER from the agent program."
811 (interactive (list (gnus-server-server-name)))
813 (error "No server on the current line"))
814 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
815 (unless (gnus-agent-method-p method)
816 (error "Server not in the agent program"))
817 (setq gnus-agent-covered-methods
818 (delete method gnus-agent-covered-methods))
819 (gnus-server-update-server server)
820 (gnus-agent-write-servers)
821 (gnus-message 1 "Removed %s from the agent" server)))
823 (defun gnus-agent-read-servers ()
824 "Read the alist of covered servers."
826 (let ((method (gnus-server-get-method
830 (unless (member method gnus-agent-covered-methods)
831 (push method gnus-agent-covered-methods))
832 (gnus-message 1 "Ignoring disappeared server `%s'" m)
834 (gnus-agent-read-file
835 (nnheader-concat gnus-agent-directory "lib/servers"))))
837 (defun gnus-agent-write-servers ()
838 "Write the alist of covered servers."
839 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
840 (let ((coding-system-for-write nnheader-file-coding-system)
841 (output-coding-system nnheader-file-coding-system)
842 (file-name-coding-system nnmail-pathname-coding-system)
843 (pathname-coding-system nnmail-pathname-coding-system))
844 (with-temp-file (nnheader-concat gnus-agent-directory "lib/servers")
845 (prin1 (mapcar 'gnus-method-simplify gnus-agent-covered-methods)
852 (defun gnus-agent-mark-article (n &optional unmark)
853 "Mark the next N articles as downloadable.
854 If N is negative, mark backward instead. If UNMARK is non-nil, remove
855 the mark instead. The difference between N and the actual number of
856 articles marked is returned."
858 (let ((backward (< n 0))
863 (gnus-summary-set-agent-mark
864 (gnus-summary-article-number) unmark)
865 (zerop (gnus-summary-next-subject (if backward -1 1) nil t))))
868 (gnus-message 7 "No more articles"))
869 (gnus-summary-recenter)
870 (gnus-summary-position-point)
873 (defun gnus-agent-unmark-article (n)
874 "Remove the downloadable mark from the next N articles.
875 If N is negative, unmark backward instead. The difference between N and
876 the actual number of articles unmarked is returned."
878 (gnus-agent-mark-article n t))
880 (defun gnus-agent-toggle-mark (n)
881 "Toggle the downloadable mark from the next N articles.
882 If N is negative, toggle backward instead. The difference between N and
883 the actual number of articles toggled is returned."
885 (gnus-agent-mark-article n 'toggle))
887 (defun gnus-summary-set-agent-mark (article &optional unmark)
888 "Mark ARTICLE as downloadable. If UNMARK is nil, article is marked.
889 When UNMARK is t, the article is unmarked. For any other value, the
890 article's mark is toggled."
891 (let ((unmark (cond ((eq nil unmark)
896 (memq article gnus-newsgroup-downloadable)))))
897 (when (gnus-summary-goto-subject article nil t)
898 (gnus-summary-update-mark
901 (setq gnus-newsgroup-downloadable
902 (delq article gnus-newsgroup-downloadable))
903 (gnus-article-mark article))
905 (setq gnus-newsgroup-downloadable
906 (gnus-add-to-sorted-list gnus-newsgroup-downloadable article))
907 gnus-downloadable-mark)
911 (defun gnus-agent-get-undownloaded-list ()
912 "Construct list of articles that have not been downloaded."
913 (let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
914 (when (set (make-local-variable 'gnus-newsgroup-agentized)
915 (gnus-agent-method-p gnus-command-method))
916 (let* ((alist (gnus-agent-load-alist gnus-newsgroup-name))
917 (headers (sort (mapcar (lambda (h)
918 (mail-header-number h))
919 gnus-newsgroup-headers) '<))
920 (cached (and gnus-use-cache gnus-newsgroup-cached))
921 (undownloaded (list nil))
922 (tail-undownloaded undownloaded)
923 (unfetched (list nil))
924 (tail-unfetched unfetched))
925 (while (and alist headers)
926 (let ((a (caar alist))
929 ;; Ignore IDs in the alist that are not being
930 ;; displayed in the summary.
933 ;; Headers that are not in the alist should be
934 ;; fictious (see nnagent-retrieve-headers); they
935 ;; imply that this article isn't in the agent.
936 (gnus-agent-append-to-list tail-undownloaded h)
937 (gnus-agent-append-to-list tail-unfetched h)
942 nil ; ignore already downloaded
948 ;; This article isn't in the agent. Check to see
949 ;; if it is in the cache. If it is, it's been
951 (while (and cached (< (car cached) a))
953 (unless (equal a (car cached))
954 (gnus-agent-append-to-list tail-undownloaded a))))))
957 (let ((num (pop headers)))
958 (gnus-agent-append-to-list tail-undownloaded num)
959 (gnus-agent-append-to-list tail-unfetched num)))
961 (setq gnus-newsgroup-undownloaded (cdr undownloaded)
962 gnus-newsgroup-unfetched (cdr unfetched))))))
964 (defun gnus-agent-catchup ()
965 "Mark as read all unhandled articles.
966 An article is unhandled if it is neither cached, nor downloaded, nor
970 (let ((articles gnus-newsgroup-undownloaded))
971 (when (or gnus-newsgroup-downloadable
972 gnus-newsgroup-cached)
973 (setq articles (gnus-sorted-ndifference
974 (gnus-sorted-ndifference
975 (gnus-copy-sequence articles)
976 gnus-newsgroup-downloadable)
977 gnus-newsgroup-cached)))
980 (gnus-summary-mark-article
981 (pop articles) gnus-catchup-mark)))
982 (gnus-summary-position-point)))
984 (defun gnus-agent-summary-fetch-series ()
986 (when gnus-newsgroup-processable
987 (setq gnus-newsgroup-downloadable
988 (let* ((dl gnus-newsgroup-downloadable)
989 (gnus-newsgroup-downloadable
990 (sort (gnus-copy-sequence gnus-newsgroup-processable) '<))
991 (fetched-articles (gnus-agent-summary-fetch-group)))
992 ;; The preceeding call to (gnus-agent-summary-fetch-group)
993 ;; updated gnus-newsgroup-downloadable to remove each
994 ;; article successfully fetched.
996 ;; For each article that I processed, remove its
997 ;; processable mark IF the article is no longer
998 ;; downloadable (i.e. it's already downloaded)
999 (dolist (article gnus-newsgroup-processable)
1000 (unless (memq article gnus-newsgroup-downloadable)
1001 (gnus-summary-remove-process-mark article)))
1002 (gnus-sorted-ndifference dl fetched-articles)))))
1004 (defun gnus-agent-summary-fetch-group (&optional all)
1005 "Fetch the downloadable articles in the group.
1006 Optional arg ALL, if non-nil, means to fetch all articles."
1009 (if all gnus-newsgroup-articles
1010 gnus-newsgroup-downloadable))
1011 (gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name))
1013 (gnus-agent-while-plugged
1015 (error "No articles to download"))
1016 (gnus-agent-with-fetch
1017 (setq gnus-newsgroup-undownloaded
1018 (gnus-sorted-ndifference
1019 gnus-newsgroup-undownloaded
1020 (setq fetched-articles
1021 (gnus-agent-fetch-articles
1022 gnus-newsgroup-name articles)))))
1024 (dolist (article articles)
1025 (let ((was-marked-downloadable
1026 (memq article gnus-newsgroup-downloadable)))
1027 (cond (gnus-agent-mark-unread-after-downloaded
1028 (setq gnus-newsgroup-downloadable
1029 (delq article gnus-newsgroup-downloadable))
1031 ;; The downloadable mark is implemented as a
1032 ;; type of read mark. Therefore, marking the
1033 ;; article as unread is sufficient to clear
1034 ;; its downloadable flag.
1035 (gnus-summary-mark-article article gnus-unread-mark))
1036 (was-marked-downloadable
1037 (gnus-summary-set-agent-mark article t)))
1038 (when (gnus-summary-goto-subject article nil t)
1039 (gnus-summary-update-download-mark article))))))
1042 (defun gnus-agent-fetch-selected-article ()
1043 "Fetch the current article as it is selected.
1044 This can be added to `gnus-select-article-hook' or
1045 `gnus-mark-article-hook'."
1046 (let ((gnus-command-method gnus-current-select-method))
1047 (when (and gnus-plugged (gnus-agent-method-p gnus-command-method))
1048 (when (gnus-agent-fetch-articles
1050 (list gnus-current-article))
1051 (setq gnus-newsgroup-undownloaded
1052 (delq gnus-current-article gnus-newsgroup-undownloaded))
1053 (gnus-summary-update-download-mark gnus-current-article)))))
1056 ;;; Internal functions
1060 ;;; The agent's active range is defined as follows:
1061 ;;; If the agent has no record of the group, use the actual active
1063 ;;; If the agent has a record, set the agent's active range to
1064 ;;; include the max limit of the actual active range.
1065 ;;; When expiring, update the min limit to match the smallest of the
1066 ;;; min article not expired or the min actual active range.
1068 (defun gnus-agent-save-active (method)
1069 (gnus-agent-save-active-1 method 'gnus-active-to-gnus-format))
1071 (defun gnus-agent-save-active-1 (method function)
1072 (when (gnus-agent-method-p method)
1073 (let* ((gnus-command-method method)
1074 (new (gnus-make-hashtable (count-lines (point-min) (point-max))))
1075 (file (gnus-agent-lib-file "active")))
1076 (funcall function nil new)
1077 (gnus-agent-write-active file new)
1079 (nnheader-insert-file-contents file))))
1081 (defun gnus-agent-write-active (file new &optional literal-replacement)
1083 (when (and (not literal-replacement)
1084 (file-exists-p file))
1085 (setq old (gnus-make-hashtable (count-lines (point-min) (point-max))))
1087 (nnheader-insert-file-contents file)
1088 (gnus-active-to-gnus-format nil old))
1089 ;; Iterate over the current active groups, the current active
1090 ;; range may expand, but NOT CONTRACT, the agent's active range.
1093 (let ((new-active (and nsym (boundp nsym) (symbol-value nsym))))
1095 (let* ((osym (intern (symbol-name nsym) old))
1096 (old-active (and (boundp osym) (symbol-value osym))))
1098 (let ((new-min (car new-active))
1099 (old-min (car old-active))
1100 (new-max (cdr new-active))
1101 (old-max (cdr old-active)))
1102 (if (and (integerp new-min)
1103 (< new-min old-min))
1104 (setcar old-active new-min))
1105 (if (and (integerp new-max)
1106 (> new-max old-max))
1107 (setcdr old-active new-max)))
1108 (set osym new-active))))))
1110 (gnus-make-directory (file-name-directory file))
1111 (let ((nnmail-active-file-coding-system gnus-agent-file-coding-system))
1112 ;; The hashtable contains real names of groups. However, do NOT
1113 ;; add the foreign server prefix as gnus-active-to-gnus-format
1114 ;; will add it while reading the file.
1115 (gnus-write-active-file file old nil))))
1117 (defun gnus-agent-save-groups (method)
1118 (gnus-agent-save-active-1 method 'gnus-groups-to-gnus-format))
1120 (defun gnus-agent-save-group-info (method group active)
1121 (when (gnus-agent-method-p method)
1122 (let* ((gnus-command-method method)
1123 (coding-system-for-write nnheader-file-coding-system)
1124 (output-coding-system nnheader-file-coding-system)
1125 (file-name-coding-system nnmail-pathname-coding-system)
1126 (pathname-coding-system nnmail-pathname-coding-system)
1127 (file (gnus-agent-lib-file "active"))
1128 oactive-min oactive-max)
1129 (gnus-make-directory (file-name-directory file))
1130 (with-temp-file file
1131 ;; Emacs got problem to match non-ASCII group in multibyte buffer.
1132 (set-buffer-multibyte nil)
1133 (when (file-exists-p file)
1134 (nnheader-insert-file-contents file)
1136 (goto-char (point-min))
1137 (when (re-search-forward
1138 (concat "^" (regexp-quote group) " ") nil t)
1140 (setq oactive-max (read (current-buffer)) ;; max
1141 oactive-min (read (current-buffer)))) ;; min
1142 (gnus-delete-line)))
1143 (insert (format "%S %d %d y\n" (intern group)
1144 (max (or oactive-max (cdr active)) (cdr active))
1145 (min (or oactive-min (car active)) (car active))))
1146 (goto-char (point-max))
1147 (while (search-backward "\\." nil t)
1148 (delete-char 1))))))
1150 (defun gnus-agent-group-path (group)
1151 "Translate GROUP into a file name."
1153 ;; NOTE: This is what nnmail-group-pathname does as of Apr 2003.
1154 ;; The two methods must be kept synchronized, which is why
1155 ;; gnus-agent-group-pathname was added.
1158 (nnheader-translate-file-chars
1159 (nnheader-replace-duplicate-chars-in-string
1160 (nnheader-replace-chars-in-string
1161 (gnus-group-real-name group)
1164 (if (or nnmail-use-long-file-names
1165 (file-directory-p (expand-file-name group (gnus-agent-directory))))
1167 (mm-encode-coding-string
1168 (nnheader-replace-chars-in-string group ?. ?/)
1169 nnmail-pathname-coding-system)))
1171 (defun gnus-agent-group-pathname (group)
1172 "Translate GROUP into a file name."
1173 ;; nnagent uses nnmail-group-pathname to read articles while
1174 ;; unplugged. The agent must, therefore, use the same directory
1176 (nnmail-group-pathname (gnus-group-real-name group) (gnus-agent-directory)))
1178 (defun gnus-agent-get-function (method)
1179 (if (gnus-online method)
1184 ;;; History functions
1186 (defun gnus-agent-history-buffer ()
1187 (cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))
1189 (defun gnus-agent-open-history ()
1191 (push (cons (gnus-agent-method)
1192 (set-buffer (gnus-get-buffer-create
1193 (format " *Gnus agent %s history*"
1194 (gnus-agent-method)))))
1195 gnus-agent-history-buffers)
1196 (set-buffer-multibyte nil) ;; everything is binary
1199 (let ((file (gnus-agent-lib-file "history")))
1200 (when (file-exists-p file)
1201 (nnheader-insert-file-contents file))
1202 (set (make-local-variable 'gnus-agent-file-name) file))))
1204 (defun gnus-agent-close-history ()
1205 (when (gnus-buffer-live-p gnus-agent-current-history)
1206 (kill-buffer gnus-agent-current-history)
1207 (setq gnus-agent-history-buffers
1208 (delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
1209 gnus-agent-history-buffers))))
1215 (defun gnus-agent-fetch-articles (group articles)
1216 "Fetch ARTICLES from GROUP and put them into the Agent."
1218 (gnus-agent-load-alist group)
1219 (let* ((alist gnus-agent-article-alist)
1220 (headers (if (< (length articles) 2) nil gnus-newsgroup-headers))
1221 (selected-sets (list nil))
1222 (current-set-size 0)
1225 ;; Check each article
1226 (while (setq article (pop articles))
1227 ;; Skip alist entries preceeding this article
1228 (while (> article (or (caar alist) (1+ article)))
1229 (setq alist (cdr alist)))
1231 ;; Prune off articles that we have already fetched.
1232 (unless (and (eq article (caar alist))
1234 ;; Skip headers preceeding this article
1237 (let* ((header (car headers)))
1239 (mail-header-number header)
1241 (setq headers (cdr headers)))
1243 ;; Add this article to the current set
1244 (setcar selected-sets (cons article (car selected-sets)))
1246 ;; Update the set size, when the set is too large start a
1247 ;; new one. I do this after adding the article as I want at
1248 ;; least one article in each set.
1249 (when (< gnus-agent-max-fetch-size
1250 (setq current-set-size
1252 (if (= header-number article)
1253 (let ((char-size (mail-header-chars
1255 (if (<= char-size 0)
1256 ;; The char size was missing/invalid,
1257 ;; assume a worst-case situation of
1258 ;; 65 char/line. If the line count
1259 ;; is missing, arbitrarily assume a
1260 ;; size of 1000 characters.
1261 (max (* 65 (mail-header-lines
1266 (setcar selected-sets (nreverse (car selected-sets)))
1267 (setq selected-sets (cons nil selected-sets)
1268 current-set-size 0))))
1270 (when (or (cdr selected-sets) (car selected-sets))
1271 (let* ((fetched-articles (list nil))
1272 (tail-fetched-articles fetched-articles)
1273 (dir (gnus-agent-group-pathname group))
1274 (date (time-to-days (current-time)))
1275 (case-fold-search t)
1278 (setcar selected-sets (nreverse (car selected-sets)))
1279 (setq selected-sets (nreverse selected-sets))
1281 (gnus-make-directory dir)
1282 (gnus-message 7 "Fetching articles for %s..." group)
1285 (while (setq articles (pop selected-sets))
1286 ;; Fetch the articles from the backend.
1287 (if (gnus-check-backend-function 'retrieve-articles group)
1288 (setq pos (gnus-retrieve-articles articles group))
1291 (while (setq article (pop articles))
1292 (gnus-message 10 "Fetching article %s for %s..."
1295 (gnus-backlog-request-article group article
1297 (gnus-request-article article group))
1298 (goto-char (point-max))
1299 (push (cons article (point)) pos)
1300 (insert-buffer-substring nntp-server-buffer)))
1302 nntp-server-buffer (point-min) (point-max))
1303 (setq pos (nreverse pos)))))
1304 ;; Then save these articles into the Agent.
1306 (set-buffer nntp-server-buffer)
1308 (narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
1309 (goto-char (point-min))
1310 (unless (eobp) ;; Don't save empty articles.
1311 (when (search-forward "\n\n" nil t)
1312 (when (search-backward "\nXrefs: " nil t)
1313 ;; Handle cross posting.
1314 (goto-char (match-end 0)) ; move to end of header name
1315 (skip-chars-forward "^ ") ; skip server name
1316 (skip-chars-forward " ")
1318 (while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) *")
1319 (push (cons (buffer-substring (match-beginning 1)
1322 (buffer-substring (match-beginning 2)
1325 (goto-char (match-end 0)))
1326 (gnus-agent-crosspost crosses (caar pos) date)))
1327 (goto-char (point-min))
1328 (if (not (re-search-forward
1329 "^Message-ID: *<\\([^>\n]+\\)>" nil t))
1330 (setq id "No-Message-ID-in-article")
1331 (setq id (buffer-substring
1332 (match-beginning 1) (match-end 1))))
1333 (write-region-as-coding-system
1334 gnus-agent-file-coding-system (point-min) (point-max)
1335 (concat dir (number-to-string (caar pos))) nil 'silent)
1337 (gnus-agent-append-to-list
1338 tail-fetched-articles (caar pos)))
1342 (gnus-agent-save-alist group (cdr fetched-articles) date)
1343 (gnus-message 7 ""))
1344 (cdr fetched-articles))))))
1346 (defun gnus-agent-crosspost (crosses article &optional date)
1347 (setq date (or date t))
1349 (let (gnus-agent-article-alist group alist beg end)
1351 (set-buffer gnus-agent-overview-buffer)
1352 (when (nnheader-find-nov-line article)
1355 (setq end (progn (forward-line 1) (point)))))
1357 (setq group (caar crosses))
1358 (unless (setq alist (assoc group gnus-agent-group-alist))
1359 (push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
1360 gnus-agent-group-alist))
1361 (setcdr alist (cons (cons (cdar crosses) date) (cdr alist)))
1363 (set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
1365 (when (= (point-max) (point-min))
1366 (push (cons group (current-buffer)) gnus-agent-buffer-alist)
1368 (nnheader-insert-file-contents
1369 (gnus-agent-article-name ".overview" group))))
1370 (nnheader-find-nov-line (string-to-number (cdar crosses)))
1371 (insert (string-to-number (cdar crosses)))
1372 (insert-buffer-substring gnus-agent-overview-buffer beg end)
1373 (gnus-agent-check-overview-buffer))
1376 (defun gnus-agent-backup-overview-buffer ()
1377 (when gnus-newsgroup-name
1378 (let ((root (gnus-agent-article-name ".overview" gnus-newsgroup-name))
1381 (while (file-exists-p
1382 (setq name (concat root "~"
1383 (int-to-string (setq cnt (1+ cnt))) "~"))))
1384 (write-region (point-min) (point-max) name nil 'no-msg)
1385 (gnus-message 1 "Created backup copy of overview in %s." name)))
1388 (defun gnus-agent-check-overview-buffer (&optional buffer)
1389 "Check the overview file given for sanity.
1390 In particular, checks that the file is sorted by article number
1391 and that there are no duplicates."
1396 (set-buffer buffer))
1399 (goto-char (point-min))
1401 (while (< (point) (point-max))
1403 (cur (condition-case nil
1404 (read (current-buffer))
1407 ((or (not (integerp cur))
1408 (not (eq (char-after) ?\t)))
1410 (setq backed-up (gnus-agent-backup-overview-buffer)))
1412 "Overview buffer contains garbage '%s'."
1414 p (gnus-point-at-eol))))
1417 (setq backed-up (gnus-agent-backup-overview-buffer)))
1419 "Duplicate overview line for %d" cur)
1420 (delete-region (point) (progn (forward-line 1) (point))))
1423 (setq backed-up (gnus-agent-backup-overview-buffer)))
1424 (gnus-message 1 "Overview buffer not sorted!")
1425 (sort-numeric-fields 1 (point-min) (point-max))
1426 (goto-char (point-min))
1429 (setq prev-num cur)))
1430 (forward-line 1)))))))
1432 (defun gnus-agent-flush-cache ()
1434 (while gnus-agent-buffer-alist
1435 (set-buffer (cdar gnus-agent-buffer-alist))
1436 (write-region-as-coding-system
1437 gnus-agent-file-coding-system
1438 (point-min) (point-max)
1439 (gnus-agent-article-name ".overview"
1440 (caar gnus-agent-buffer-alist))
1442 (pop gnus-agent-buffer-alist))
1443 (while gnus-agent-group-alist
1444 (with-temp-file (gnus-agent-article-name
1445 ".agentview" (caar gnus-agent-group-alist))
1446 (princ (cdar gnus-agent-group-alist))
1448 (princ 1 (current-buffer))
1450 (pop gnus-agent-group-alist))))
1452 (defun gnus-agent-find-parameter (group symbol)
1453 "Search for GROUPs SYMBOL in the group's parameters, the group's
1454 topic parameters, the group's category, or the customizable
1455 variables. Returns the first non-nil value found."
1456 (or (gnus-group-find-parameter group symbol t)
1457 (gnus-group-parameter-value (cdr (gnus-group-category group)) symbol t)
1461 '((agent-short-article . gnus-agent-short-article)
1462 (agent-long-article . gnus-agent-long-article)
1463 (agent-low-score . gnus-agent-low-score)
1464 (agent-high-score . gnus-agent-high-score)
1465 (agent-days-until-old . gnus-agent-expire-days)
1466 (agent-enable-expiration
1467 . gnus-agent-enable-expiration)
1468 (agent-predicate . gnus-agent-predicate)))))))
1470 (defun gnus-agent-fetch-headers (group &optional force)
1471 "Fetch interesting headers into the agent. The group's overview
1472 file will be updated to include the headers while a list of available
1473 article numbers will be returned."
1474 (let* ((fetch-all (and gnus-agent-consider-all-articles
1475 ;; Do not fetch all headers if the predicate
1476 ;; implies that we only consider unread articles.
1477 (not (gnus-predicate-implies-unread
1478 (gnus-agent-find-parameter group
1479 'agent-predicate)))))
1480 (articles (if fetch-all
1481 (gnus-uncompress-range (gnus-active group))
1482 (gnus-list-of-unread-articles group)))
1483 (gnus-decode-encoded-word-function 'identity)
1484 (file (gnus-agent-article-name ".overview" group)))
1485 ;; Check whether the number of articles is not too large.
1486 (when (and (integerp gnus-agent-large-newsgroup)
1487 (> gnus-agent-large-newsgroup 0))
1488 (setq articles (nthcdr (max (- (length articles)
1489 gnus-agent-large-newsgroup)
1493 ;; Add articles with marks to the list of article headers we want to
1494 ;; fetch. Don't fetch articles solely on the basis of a recent or seen
1495 ;; mark, but do fetch recent or seen articles if they have other, more
1496 ;; interesting marks. (We have to fetch articles with boring marks
1497 ;; because otherwise the agent will remove their marks.)
1498 (dolist (arts (gnus-info-marks (gnus-get-info group)))
1499 (unless (memq (car arts) '(seen recent killed cache))
1500 (setq articles (gnus-range-add articles (cdr arts)))))
1501 (setq articles (sort (gnus-uncompress-sequence articles) '<)))
1503 ;; At this point, I have the list of articles to consider for
1504 ;; fetching. This is the list that I'll return to my caller. Some
1505 ;; of these articles may have already been fetched. That's OK as
1506 ;; the fetch article code will filter those out. Internally, I'll
1507 ;; filter this list to just those articles whose headers need to
1509 (let ((articles articles))
1510 ;; Remove known articles.
1511 (when (and (or gnus-agent-cache
1513 (gnus-agent-load-alist group))
1514 ;; Remove articles marked as downloaded.
1516 ;; I want to fetch all headers in the active range.
1517 ;; Therefore, exclude only those headers that are in the
1519 ;; NOTE: This is probably NOT what I want to do after
1520 ;; agent expiration in this group.
1521 (setq articles (gnus-agent-uncached-articles articles group))
1523 ;; I want to only fetch those headers that have never been
1524 ;; fetched. Therefore, exclude all headers that are, or
1525 ;; WERE, in the article alist.
1526 (let ((low (1+ (caar (last gnus-agent-article-alist))))
1527 (high (cdr (gnus-active group))))
1528 ;; Low can be greater than High when the same group is
1529 ;; fetched twice in the same session {The first fetch will
1530 ;; fill the article alist such that (last
1531 ;; gnus-agent-article-alist) equals (cdr (gnus-active
1532 ;; group))}. The addition of one(the 1+ above) then
1533 ;; forces Low to be greater than High. When this happens,
1534 ;; gnus-list-range-intersection returns nil which
1535 ;; indicates that no headers need to be fetched. -- Kevin
1536 (setq articles (gnus-list-range-intersection
1537 articles (list (cons low high)))))))
1540 10 "gnus-agent-fetch-headers: undownloaded articles are '%s'"
1541 (gnus-compress-sequence articles t))
1544 (set-buffer nntp-server-buffer)
1548 (gnus-message 7 "Fetching headers for %s..." group)
1551 (gnus-make-directory (nnheader-translate-file-chars
1552 (file-name-directory file) t))
1554 (unless (eq 'nov (gnus-retrieve-headers articles group))
1555 (nnvirtual-convert-headers))
1556 (gnus-agent-check-overview-buffer)
1557 ;; Move these headers to the overview buffer so that
1558 ;; gnus-agent-braid-nov can merge them with the contents
1561 gnus-agent-overview-buffer (point-min) (point-max))
1562 (when (file-exists-p file)
1563 (gnus-agent-braid-nov group articles file))
1564 (gnus-agent-check-overview-buffer)
1565 (write-region-as-coding-system
1566 gnus-agent-file-coding-system
1567 (point-min) (point-max) file nil 'silent)
1568 (gnus-agent-save-alist group articles nil)
1572 (nnheader-insert-file-contents file)))))
1575 (defsubst gnus-agent-copy-nov-line (article)
1577 (set-buffer gnus-agent-overview-buffer)
1578 (while (and (not (eobp))
1579 (< (setq art (read (current-buffer))) article))
1583 (not (eq article art)))
1584 (set-buffer nntp-server-buffer)
1586 (setq e (progn (forward-line 1) (point)))
1587 (set-buffer nntp-server-buffer)
1588 (insert-buffer-substring gnus-agent-overview-buffer b e))))
1590 (defun gnus-agent-braid-nov (group articles file)
1591 "Merge agent overview data with given file.
1592 Takes headers for ARTICLES from `gnus-agent-overview-buffer' and the given
1593 FILE and places the combined headers into `nntp-server-buffer'."
1595 (set-buffer gnus-agent-overview-buffer)
1596 (goto-char (point-min))
1597 (set-buffer nntp-server-buffer)
1599 (nnheader-insert-file-contents file)
1600 (goto-char (point-max))
1602 (unless (looking-at "[0-9]+\t")
1603 ;; Remove corrupted lines
1605 1 "Overview %s is corrupted. Removing corrupted lines..." file)
1606 (goto-char (point-min))
1608 (if (looking-at "[0-9]+\t")
1610 (delete-region (point) (progn (forward-line 1) (point)))))
1612 (unless (or (= (point-min) (point-max))
1613 (< (setq last (read (current-buffer))) (car articles)))
1614 ;; We do it the hard way.
1615 (when (nnheader-find-nov-line (car articles))
1616 ;; Replacing existing NOV entry
1617 (delete-region (point) (progn (forward-line 1) (point))))
1618 (gnus-agent-copy-nov-line (pop articles))
1622 (while (let ((art (read (current-buffer))))
1623 (cond ((< art (car articles))
1626 ((= art (car articles))
1629 (point) (progn (forward-line 1) (point)))
1635 (gnus-agent-copy-nov-line (pop articles)))))
1637 ;; Copy the rest lines
1638 (set-buffer nntp-server-buffer)
1639 (goto-char (point-max))
1642 (set-buffer gnus-agent-overview-buffer)
1644 (while (<= (read (current-buffer)) last)
1647 (setq start (point))
1648 (set-buffer nntp-server-buffer))
1649 (insert-buffer-substring gnus-agent-overview-buffer start))))
1651 ;; Keeps the compiler from warning about the free variable in
1652 ;; gnus-agent-read-agentview.
1654 (defvar gnus-agent-read-agentview))
1656 (defun gnus-agent-load-alist (group)
1657 "Load the article-state alist for GROUP."
1658 ;; Bind free variable that's used in `gnus-agent-read-agentview'.
1659 (let ((gnus-agent-read-agentview group))
1660 (setq gnus-agent-article-alist
1661 (gnus-cache-file-contents
1662 (gnus-agent-article-name ".agentview" group)
1663 'gnus-agent-file-loading-cache
1664 'gnus-agent-read-agentview))))
1666 ;; Save format may be either 1 or 2. Two is the new, compressed
1667 ;; format that is still being tested. Format 1 is uncompressed but
1668 ;; known to be reliable.
1669 (defconst gnus-agent-article-alist-save-format 2)
1671 (defun gnus-agent-read-agentview (file)
1672 "Load FILE and do a `read' there."
1675 (nnheader-insert-file-contents file)
1676 (goto-char (point-min))
1677 (let ((alist (read (current-buffer)))
1678 (version (condition-case nil (read (current-buffer))
1684 (let ((inhibit-quit t)
1686 (gnus-agent-open-history)
1687 (set-buffer (gnus-agent-history-buffer))
1688 (goto-char (point-min))
1690 (if (and (looking-at
1691 "[^\t\n]+\t\\([0-9]+\\)\t\\([^ \n]+\\) \\([0-9]+\\)")
1692 (string= (match-string 2)
1693 gnus-agent-read-agentview)
1694 (setq entry (assoc (string-to-number (match-string 3)) alist)))
1695 (setcdr entry (string-to-number (match-string 1))))
1697 (gnus-agent-close-history)
1698 (setq changed-version t)))
1700 (setq changed-version (not (= 1 gnus-agent-article-alist-save-format))))
1705 (let ((state (car comp-list))
1706 (sequence (gnus-uncompress-sequence
1708 (mapcar (lambda (article-id)
1709 (setq uncomp (cons (cons article-id state) uncomp)))
1712 (setq alist (sort uncomp
1713 (lambda (first second)
1714 (< (car first) (car second))))))))
1715 (when changed-version
1716 (let ((gnus-agent-article-alist alist))
1717 (gnus-agent-save-alist gnus-agent-read-agentview)))
1720 (defun gnus-agent-save-alist (group &optional articles state dir)
1721 "Save the article-state alist for GROUP."
1722 (let* ((file-name-coding-system nnmail-pathname-coding-system)
1723 (pathname-coding-system nnmail-pathname-coding-system)
1724 (prev (cons nil gnus-agent-article-alist))
1726 print-level print-length item article)
1727 (while (setq article (pop articles))
1728 (while (and (cdr prev)
1729 (< (caadr prev) article))
1730 (setq prev (cdr prev)))
1733 (setcdr prev (list (cons article state))))
1734 ((> (caadr prev) article)
1735 (setcdr prev (cons (cons article state) (cdr prev))))
1736 ((= (caadr prev) article)
1737 (setcdr (cadr prev) state)))
1738 (setq prev (cdr prev)))
1739 (setq gnus-agent-article-alist (cdr all))
1741 (gnus-make-directory dir)
1742 (gnus-make-directory (gnus-agent-article-name "" group)))
1743 (with-temp-file (if dir
1744 (expand-file-name ".agentview" dir)
1745 (gnus-agent-article-name ".agentview" group))
1746 (cond ((eq gnus-agent-article-alist-save-format 1)
1747 (princ gnus-agent-article-alist (current-buffer)))
1748 ((eq gnus-agent-article-alist-save-format 2)
1749 (let ((compressed nil))
1750 (mapcar (lambda (pair)
1751 (let* ((article-id (car pair))
1752 (day-of-download (cdr pair))
1753 (comp-list (assq day-of-download compressed)))
1756 (cons article-id (cdr comp-list)))
1758 (cons (list day-of-download article-id)
1760 nil)) gnus-agent-article-alist)
1761 (mapcar (lambda (comp-list)
1763 (gnus-compress-sequence
1764 (nreverse (cdr comp-list)))))
1766 (princ compressed (current-buffer)))))
1768 (princ gnus-agent-article-alist-save-format (current-buffer))
1771 (defun gnus-agent-article-name (article group)
1772 (expand-file-name article
1773 (file-name-as-directory
1774 (gnus-agent-group-pathname group))))
1776 (defun gnus-agent-batch-confirmation (msg)
1777 "Show error message and return t."
1778 (gnus-message 1 msg)
1782 (defun gnus-agent-batch-fetch ()
1783 "Start Gnus and fetch session."
1786 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
1787 (gnus-agent-fetch-session))
1790 (defun gnus-agent-fetch-session ()
1791 "Fetch all articles and headers that are eligible for fetching."
1793 (unless gnus-agent-covered-methods
1794 (error "No servers are covered by the Gnus agent"))
1795 (unless gnus-plugged
1796 (error "Can't fetch articles while Gnus is unplugged"))
1797 (let ((methods gnus-agent-covered-methods)
1798 groups group gnus-command-method)
1801 (setq gnus-command-method (car methods))
1802 (when (and (or (gnus-server-opened gnus-command-method)
1803 (gnus-open-server gnus-command-method))
1804 (gnus-online gnus-command-method))
1805 (setq groups (gnus-groups-from-server (car methods)))
1806 (gnus-agent-with-fetch
1807 (while (setq group (pop groups))
1808 (when (<= (gnus-group-level group)
1809 gnus-agent-handle-level)
1810 (if (or debug-on-error debug-on-quit)
1811 (gnus-agent-fetch-group-1
1812 group gnus-command-method)
1814 (gnus-agent-fetch-group-1
1815 group gnus-command-method)
1817 (unless (funcall gnus-agent-confirmation-function
1818 (format "Error %s. Continue? "
1819 (error-message-string err)))
1820 (error "Cannot fetch articles into the Gnus agent")))
1822 (unless (funcall gnus-agent-confirmation-function
1824 "Quit fetching session %s. Continue? "
1825 (error-message-string err)))
1827 "Cannot fetch articles into the Gnus agent")))))))))
1829 (gnus-run-hooks 'gnus-agent-fetched-hook)
1830 (gnus-message 6 "Finished fetching articles into the Gnus agent"))))
1832 (defun gnus-agent-fetch-group-1 (group method)
1834 (let ((gnus-command-method method)
1835 (gnus-newsgroup-name group)
1836 (gnus-newsgroup-dependencies gnus-newsgroup-dependencies)
1837 (gnus-newsgroup-headers gnus-newsgroup-headers)
1838 (gnus-newsgroup-scored gnus-newsgroup-scored)
1839 (gnus-use-cache gnus-use-cache)
1840 (gnus-summary-expunge-below gnus-summary-expunge-below)
1841 (gnus-summary-mark-below gnus-summary-mark-below)
1842 (gnus-orphan-score gnus-orphan-score)
1843 ;; Maybe some other gnus-summary local variables should also
1849 category predicate info marks score-param
1851 (unless (gnus-check-group group)
1852 (error "Can't open server for %s" group))
1855 (when (or gnus-newsgroup-active
1857 (gnus-activate-group group))
1858 (let ((marked-articles gnus-newsgroup-downloadable))
1859 ;; Identify the articles marked for download
1860 (unless gnus-newsgroup-active
1861 ;; The variable gnus-newsgroup-active was selected as I need
1862 ;; a gnus-summary local variable that is NOT bound to any
1863 ;; value (its global value should default to nil).
1864 (dolist (mark gnus-agent-download-marks)
1865 (let ((arts (cdr (assq mark (gnus-info-marks
1866 (setq info (gnus-get-info group)))))))
1868 (setq marked-articles (nconc (gnus-uncompress-range arts)
1871 (setq marked-articles (sort marked-articles '<))
1873 ;; Fetch any new articles from the server
1874 (setq articles (gnus-agent-fetch-headers group))
1876 ;; Merge new articles with marked
1877 (setq articles (sort (append marked-articles articles) '<))
1880 ;; Parse them and see which articles we want to fetch.
1881 (setq gnus-newsgroup-dependencies
1882 (or gnus-newsgroup-dependencies
1883 (make-vector (length articles) 0)))
1884 (setq gnus-newsgroup-headers
1885 (or gnus-newsgroup-headers
1886 (gnus-get-newsgroup-headers-xover articles nil nil
1888 ;; `gnus-agent-overview-buffer' may be killed for
1889 ;; timeout reason. If so, recreate it.
1890 (gnus-agent-create-buffer)
1892 ;; Figure out how to select articles in this group
1893 (setq category (gnus-group-category group))
1897 (gnus-agent-find-parameter group 'agent-predicate)))
1899 ;; If the selection predicate requires scoring, score each header
1900 (unless (memq predicate '(gnus-agent-true gnus-agent-false))
1902 (gnus-agent-find-parameter group 'agent-score-file)))
1903 ;; Translate score-param into real one
1906 ((eq score-param 'file)
1907 (setq score-param (gnus-all-score-files group)))
1908 ((stringp (car score-param)))
1910 (setq score-param (list (list score-param)))))
1912 (gnus-score-headers score-param))))
1914 (unless (and (eq predicate 'gnus-agent-false)
1915 (not marked-articles))
1916 (let ((arts (list nil)))
1917 (let ((arts-tail arts)
1918 (alist (gnus-agent-load-alist group))
1919 (marked-articles marked-articles)
1920 (gnus-newsgroup-headers gnus-newsgroup-headers))
1921 (while (setq gnus-headers (pop gnus-newsgroup-headers))
1922 (let ((num (mail-header-number gnus-headers)))
1923 ;; Determine if this article is already in the cache
1925 (> num (caar alist)))
1926 (setq alist (cdr alist)))
1928 (unless (and (eq num (caar alist))
1931 ;; Determine if this article was marked for download.
1932 (while (and marked-articles
1933 (> num (car marked-articles)))
1934 (setq marked-articles
1935 (cdr marked-articles)))
1937 ;; When this article is marked, or selected by the
1938 ;; predicate, add it to the download list
1939 (when (or (eq num (car marked-articles))
1942 (assq num gnus-newsgroup-scored))
1943 gnus-summary-default-score))
1944 (gnus-agent-long-article
1945 (gnus-agent-find-parameter
1946 group 'agent-long-article))
1947 (gnus-agent-short-article
1948 (gnus-agent-find-parameter
1949 group 'agent-short-article))
1950 (gnus-agent-low-score
1951 (gnus-agent-find-parameter
1952 group 'agent-low-score))
1953 (gnus-agent-high-score
1954 (gnus-agent-find-parameter
1955 group 'agent-high-score))
1956 (gnus-agent-expire-days
1957 (gnus-agent-find-parameter
1958 group 'agent-days-until-old)))
1959 (funcall predicate)))
1960 (gnus-agent-append-to-list arts-tail num))))))
1962 (let (fetched-articles)
1963 ;; Fetch all selected articles
1964 (setq gnus-newsgroup-undownloaded
1965 (gnus-sorted-ndifference
1966 gnus-newsgroup-undownloaded
1967 (setq fetched-articles
1969 (gnus-agent-fetch-articles group (cdr arts))
1972 (let ((unfetched-articles
1973 (gnus-sorted-ndifference (cdr arts) fetched-articles)))
1974 (if gnus-newsgroup-active
1975 ;; Update the summary buffer
1977 (dolist (article marked-articles)
1978 (gnus-summary-set-agent-mark article t))
1979 (dolist (article fetched-articles)
1980 (if gnus-agent-mark-unread-after-downloaded
1981 (gnus-summary-mark-article
1982 article gnus-unread-mark))
1983 (when (gnus-summary-goto-subject article nil t)
1984 (gnus-summary-update-download-mark article)))
1985 (dolist (article unfetched-articles)
1986 (gnus-summary-mark-article
1987 article gnus-canceled-mark)))
1989 ;; Update the group buffer.
1991 ;; When some, or all, of the marked articles came
1992 ;; from the download mark. Remove that mark. I
1993 ;; didn't do this earlier as I only want to remove
1994 ;; the marks after the fetch is completed.
1996 (dolist (mark gnus-agent-download-marks)
1997 (when (eq mark 'download)
1999 (assq mark (gnus-info-marks
2000 (setq info (gnus-get-info group))))))
2001 (when (cdr marked-arts)
2003 (delq marked-arts (gnus-info-marks info)))
2004 (gnus-info-set-marks info marks)))))
2005 (let ((read (gnus-info-read
2006 (or info (setq info (gnus-get-info group))))))
2008 info (gnus-add-to-range read unfetched-articles)))
2010 (gnus-group-update-group group t)
2014 (concat "(gnus-group-set-info '"
2015 (gnus-prin1-to-string info)
2019 ;;; Agent Category Mode
2022 (defvar gnus-category-mode-hook nil
2023 "Hook run in `gnus-category-mode' buffers.")
2025 (defvar gnus-category-line-format " %(%20c%): %g\n"
2026 "Format of category lines.
2028 Valid specifiers include:
2029 %c Topic name (string)
2030 %g The number of groups in the topic (integer)
2032 General format specifiers can also be used. See Info node
2033 `(gnus)Formatting Variables'.")
2035 (defvar gnus-category-mode-line-format "Gnus: %%b"
2036 "The format specification for the category mode line.")
2038 (defvar gnus-agent-predicate 'false
2039 "The selection predicate used when no other source is available.")
2041 (defvar gnus-agent-short-article 100
2042 "Articles that have fewer lines than this are short.")
2044 (defvar gnus-agent-long-article 200
2045 "Articles that have more lines than this are long.")
2047 (defvar gnus-agent-low-score 0
2048 "Articles that have a score lower than this have a low score.")
2050 (defvar gnus-agent-high-score 0
2051 "Articles that have a score higher than this have a high score.")
2054 ;;; Internal variables.
2056 (defvar gnus-category-buffer "*Agent Category*")
2058 (defvar gnus-category-line-format-alist
2059 `((?c gnus-tmp-name ?s)
2060 (?g gnus-tmp-groups ?d)))
2062 (defvar gnus-category-mode-line-format-alist
2063 `((?u user-defined ?s)))
2065 (defvar gnus-category-line-format-spec nil)
2066 (defvar gnus-category-mode-line-format-spec nil)
2068 (defvar gnus-category-mode-map nil)
2069 (put 'gnus-category-mode 'mode-class 'special)
2071 (unless gnus-category-mode-map
2072 (setq gnus-category-mode-map (make-sparse-keymap))
2073 (suppress-keymap gnus-category-mode-map)
2075 (gnus-define-keys gnus-category-mode-map
2076 "q" gnus-category-exit
2077 "k" gnus-category-kill
2078 "c" gnus-category-copy
2079 "a" gnus-category-add
2080 "e" gnus-agent-customize-category
2081 "p" gnus-category-edit-predicate
2082 "g" gnus-category-edit-groups
2083 "s" gnus-category-edit-score
2084 "l" gnus-category-list
2086 "\C-c\C-i" gnus-info-find-node
2087 "\C-c\C-b" gnus-bug))
2089 (defvar gnus-category-menu-hook nil
2090 "*Hook run after the creation of the menu.")
2092 (defun gnus-category-make-menu-bar ()
2093 (gnus-turn-off-edit-menu 'category)
2094 (unless (boundp 'gnus-category-menu)
2096 gnus-category-menu gnus-category-mode-map ""
2098 ["Add" gnus-category-add t]
2099 ["Kill" gnus-category-kill t]
2100 ["Copy" gnus-category-copy t]
2101 ["Edit category" gnus-agent-customize-category t]
2102 ["Edit predicate" gnus-category-edit-predicate t]
2103 ["Edit score" gnus-category-edit-score t]
2104 ["Edit groups" gnus-category-edit-groups t]
2105 ["Exit" gnus-category-exit t]))
2107 (gnus-run-hooks 'gnus-category-menu-hook)))
2109 (defun gnus-category-mode ()
2110 "Major mode for listing and editing agent categories.
2112 All normal editing commands are switched off.
2113 \\<gnus-category-mode-map>
2114 For more in-depth information on this mode, read the manual
2115 \(`\\[gnus-info-find-node]').
2117 The following commands are available:
2119 \\{gnus-category-mode-map}"
2121 (when (gnus-visual-p 'category-menu 'menu)
2122 (gnus-category-make-menu-bar))
2123 (kill-all-local-variables)
2124 (gnus-simplify-mode-line)
2125 (setq major-mode 'gnus-category-mode)
2126 (setq mode-name "Category")
2127 (gnus-set-default-directory)
2128 (setq mode-line-process nil)
2129 (use-local-map gnus-category-mode-map)
2130 (buffer-disable-undo)
2131 (setq truncate-lines t)
2132 (setq buffer-read-only t)
2133 (gnus-run-hooks 'gnus-category-mode-hook))
2135 (defalias 'gnus-category-position-point 'gnus-goto-colon)
2137 (defun gnus-category-insert-line (category)
2138 (let* ((gnus-tmp-name (format "%s" (car category)))
2139 (gnus-tmp-groups (length (gnus-agent-cat-groups category))))
2141 (gnus-add-text-properties
2145 (eval gnus-category-line-format-spec))
2146 (list 'gnus-category gnus-tmp-name))))
2148 (defun gnus-enter-category-buffer ()
2149 "Go to the Category buffer."
2151 (gnus-category-setup-buffer)
2152 (gnus-configure-windows 'category)
2153 (gnus-category-prepare))
2155 (defun gnus-category-setup-buffer ()
2156 (unless (get-buffer gnus-category-buffer)
2158 (set-buffer (gnus-get-buffer-create gnus-category-buffer))
2159 (gnus-category-mode))))
2161 (defun gnus-category-prepare ()
2162 (gnus-set-format 'category-mode)
2163 (gnus-set-format 'category t)
2164 (let ((alist gnus-category-alist)
2165 (buffer-read-only nil))
2168 (gnus-category-insert-line (pop alist)))
2169 (goto-char (point-min))
2170 (gnus-category-position-point)))
2172 (defun gnus-category-name ()
2173 (or (intern (get-text-property (gnus-point-at-bol) 'gnus-category))
2174 (error "No category on the current line")))
2176 (defun gnus-category-read ()
2177 "Read the category alist."
2178 (setq gnus-category-alist
2182 (nnheader-insert-file-contents (nnheader-concat gnus-agent-directory "lib/categories"))
2183 (goto-char (point-min))
2184 ;; This code isn't temp, it will be needed so long as
2185 ;; anyone may be migrating from an older version.
2187 ;; Once we're certain that people will not revert to an
2188 ;; earlier version, we can take out the old-list code in
2189 ;; gnus-category-write.
2190 (let* ((old-list (read (current-buffer)))
2191 (new-list (ignore-errors (read (current-buffer)))))
2194 ;; Convert from a positional list to an alist.
2204 '(agent-predicate agent-score-file agent-groups))))
2207 (list (gnus-agent-cat-make 'default)))))
2209 (defun gnus-category-write ()
2210 "Write the category alist."
2211 (setq gnus-category-predicate-cache nil
2212 gnus-category-group-cache nil)
2213 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
2214 (with-temp-file (nnheader-concat gnus-agent-directory "lib/categories")
2215 ;; This prin1 is temporary. It exists so that people can revert
2216 ;; to an earlier version of gnus-agent.
2217 (prin1 (mapcar (lambda (c)
2219 (cdr (assoc 'agent-predicate c))
2220 (cdr (assoc 'agent-score-file c))
2221 (cdr (assoc 'agent-groups c))))
2222 gnus-category-alist)
2225 (prin1 gnus-category-alist (current-buffer))))
2227 (defun gnus-category-edit-predicate (category)
2228 "Edit the predicate for CATEGORY."
2229 (interactive (list (gnus-category-name)))
2230 (let ((info (assq category gnus-category-alist)))
2232 (gnus-agent-cat-predicate info)
2233 (format "Editing the select predicate for category %s" category)
2234 `(lambda (predicate)
2235 ;; Avoid run-time execution of setf form
2236 ;; (setf (gnus-agent-cat-predicate (assq ',category gnus-category-alist))
2238 ;; use its expansion instead:
2239 (gnus-agent-cat-set-property (assq ',category gnus-category-alist)
2240 'agent-predicate predicate)
2242 (gnus-category-write)
2243 (gnus-category-list)))))
2245 (defun gnus-category-edit-score (category)
2246 "Edit the score expression for CATEGORY."
2247 (interactive (list (gnus-category-name)))
2248 (let ((info (assq category gnus-category-alist)))
2250 (gnus-agent-cat-score-file info)
2251 (format "Editing the score expression for category %s" category)
2252 `(lambda (score-file)
2253 ;; Avoid run-time execution of setf form
2254 ;; (setf (gnus-agent-cat-score-file (assq ',category gnus-category-alist))
2256 ;; use its expansion instead:
2257 (gnus-agent-cat-set-property (assq ',category gnus-category-alist)
2258 'agent-score-file score-file)
2260 (gnus-category-write)
2261 (gnus-category-list)))))
2263 (defun gnus-category-edit-groups (category)
2264 "Edit the group list for CATEGORY."
2265 (interactive (list (gnus-category-name)))
2266 (let ((info (assq category gnus-category-alist)))
2268 (gnus-agent-cat-groups info)
2269 (format "Editing the group list for category %s" category)
2271 ;; Avoid run-time execution of setf form
2272 ;; (setf (gnus-agent-cat-groups (assq ',category gnus-category-alist))
2274 ;; use its expansion instead:
2275 (gnus-agent-set-cat-groups (assq ',category gnus-category-alist)
2278 (gnus-category-write)
2279 (gnus-category-list)))))
2281 (defun gnus-category-kill (category)
2282 "Kill the current category."
2283 (interactive (list (gnus-category-name)))
2284 (let ((info (assq category gnus-category-alist))
2285 (buffer-read-only nil))
2287 (setq gnus-category-alist (delq info gnus-category-alist))
2288 (gnus-category-write)))
2290 (defun gnus-category-copy (category to)
2291 "Copy the current category."
2292 (interactive (list (gnus-category-name) (intern (read-string "New name: "))))
2293 (let ((info (assq category gnus-category-alist)))
2294 (push (let ((newcat (gnus-copy-sequence info)))
2295 (setf (gnus-agent-cat-name newcat) to)
2296 (setf (gnus-agent-cat-groups newcat) nil)
2298 gnus-category-alist)
2299 (gnus-category-write)
2300 (gnus-category-list)))
2302 (defun gnus-category-add (category)
2303 "Create a new category."
2304 (interactive "SCategory name: ")
2305 (when (assq category gnus-category-alist)
2306 (error "Category %s already exists" category))
2307 (push (gnus-agent-cat-make category)
2308 gnus-category-alist)
2309 (gnus-category-write)
2310 (gnus-category-list))
2312 (defun gnus-category-list ()
2313 "List all categories."
2315 (gnus-category-prepare))
2317 (defun gnus-category-exit ()
2318 "Return to the group buffer."
2320 (kill-buffer (current-buffer))
2321 (gnus-configure-windows 'group t))
2323 ;; To avoid having 8-bit characters in the source file.
2324 (defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))
2326 (defvar gnus-category-predicate-alist
2327 '((spam . gnus-agent-spam-p)
2328 (short . gnus-agent-short-p)
2329 (long . gnus-agent-long-p)
2330 (low . gnus-agent-low-scored-p)
2331 (high . gnus-agent-high-scored-p)
2332 (read . gnus-agent-read-p)
2333 (true . gnus-agent-true)
2334 (false . gnus-agent-false))
2335 "Mapping from short score predicate symbols to predicate functions.")
2337 (defun gnus-agent-spam-p ()
2338 "Say whether an article is spam or not."
2339 (unless gnus-agent-spam-hashtb
2340 (setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
2341 (if (not (equal (mail-header-references gnus-headers) ""))
2343 (let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
2345 (gnus-gethash string gnus-agent-spam-hashtb)
2346 (gnus-sethash string t gnus-agent-spam-hashtb)))))
2348 (defun gnus-agent-short-p ()
2349 "Say whether an article is short or not."
2350 (< (mail-header-lines gnus-headers) gnus-agent-short-article))
2352 (defun gnus-agent-long-p ()
2353 "Say whether an article is long or not."
2354 (> (mail-header-lines gnus-headers) gnus-agent-long-article))
2356 (defun gnus-agent-low-scored-p ()
2357 "Say whether an article has a low score or not."
2358 (< gnus-score gnus-agent-low-score))
2360 (defun gnus-agent-high-scored-p ()
2361 "Say whether an article has a high score or not."
2362 (> gnus-score gnus-agent-high-score))
2364 (defun gnus-agent-read-p ()
2365 "Say whether an article is read or not."
2366 (gnus-member-of-range (mail-header-number gnus-headers)
2367 (gnus-info-read (gnus-get-info gnus-newsgroup-name))))
2369 (defun gnus-category-make-function (predicate)
2370 "Make a function from PREDICATE."
2371 (let ((func (gnus-category-make-function-1 predicate)))
2372 (if (and (= (length func) 1)
2373 (symbolp (car func)))
2375 (gnus-byte-compile `(lambda () ,func)))))
2377 (defun gnus-agent-true ()
2381 (defun gnus-agent-false ()
2385 (defun gnus-category-make-function-1 (predicate)
2386 "Make a function from PREDICATE."
2388 ;; Functions are just returned as is.
2389 ((or (symbolp predicate)
2390 (gnus-functionp predicate))
2391 `(,(or (cdr (assq predicate gnus-category-predicate-alist))
2393 ;; More complex predicate.
2396 ((memq (car predicate) '(& and))
2398 ((memq (car predicate) '(| or))
2400 ((memq (car predicate) gnus-category-not)
2402 ,@(mapcar 'gnus-category-make-function-1 (cdr predicate))))
2404 (error "Unknown predicate type: %s" predicate))))
2406 (defun gnus-get-predicate (predicate)
2407 "Return the function implementing PREDICATE."
2408 (or (cdr (assoc predicate gnus-category-predicate-cache))
2409 (let ((func (gnus-category-make-function predicate)))
2410 (setq gnus-category-predicate-cache
2411 (nconc gnus-category-predicate-cache
2412 (list (cons predicate func))))
2415 (defun gnus-predicate-implies-unread (predicate)
2416 "Say whether PREDICATE implies unread articles only.
2417 It is okay to miss some cases, but there must be no false positives.
2418 That is, if this function returns true, then indeed the predicate must
2419 return only unread articles."
2420 (gnus-function-implies-unread-1 (gnus-category-make-function predicate)))
2422 (defun gnus-function-implies-unread-1 (function)
2423 (cond ((eq function (symbol-function 'gnus-agent-read-p))
2427 ((gnus-functionp function)
2429 ((memq (car function) '(or and not))
2430 (apply (car function)
2431 (mapcar 'gnus-function-implies-unread-1 (cdr function))))
2433 (error "Unknown function: %s" function))))
2435 (defun gnus-group-category (group)
2436 "Return the category GROUP belongs to."
2437 (unless gnus-category-group-cache
2438 (setq gnus-category-group-cache (gnus-make-hashtable 1000))
2439 (let ((cs gnus-category-alist)
2441 (while (setq cat (pop cs))
2442 (setq groups (gnus-agent-cat-groups cat))
2444 (gnus-sethash (pop groups) cat gnus-category-group-cache)))))
2445 (or (gnus-gethash group gnus-category-group-cache)
2446 (assq 'default gnus-category-alist)))
2448 (defun gnus-agent-expire-group (group &optional articles force)
2449 "Expire all old articles in GROUP.
2450 If you want to force expiring of certain articles, this function can
2451 take ARTICLES, and FORCE parameters as well.
2453 The articles on which the expiration process runs are selected as follows:
2454 if ARTICLES is null, all read and unmarked articles.
2455 if ARTICLES is t, all articles.
2456 if ARTICLES is a list, just those articles.
2457 FORCE is equivalent to setting the expiration predicates to true."
2459 (list (let ((def (or (gnus-group-group-name)
2460 gnus-newsgroup-name)))
2461 (let ((select (read-string (if def
2462 (concat "Group Name ("
2465 (if (and (equal "" select)
2471 (gnus-agent-expire articles group force)
2472 (if (or (not (eq articles t))
2474 (concat "Are you sure that you want to "
2475 "expire all articles in " group ".")))
2476 (let ((gnus-command-method (gnus-find-method-for-group group))
2477 (overview (gnus-get-buffer-create " *expire overview*"))
2480 (let ((active-file (gnus-agent-lib-file "active")))
2481 (when (file-exists-p active-file)
2483 (nnheader-insert-file-contents active-file)
2484 (gnus-active-to-gnus-format
2486 (setq orig (gnus-make-hashtable
2487 (count-lines (point-min) (point-max))))))
2489 (gnus-agent-expire-group-1
2490 group overview (gnus-gethash-safe group orig)
2492 (gnus-agent-write-active active-file orig t)))
2493 (kill-buffer overview))))
2494 (gnus-message 4 "Expiry...done")))
2496 (defun gnus-agent-expire-group-1 (group overview active articles force)
2497 ;; Internal function - requires caller to have set
2498 ;; gnus-command-method, initialized overview buffer, and to have
2499 ;; provided a non-nil active
2501 (let ((dir (gnus-agent-group-pathname group)))
2502 (when (boundp 'gnus-agent-expire-current-dirs)
2503 (set 'gnus-agent-expire-current-dirs
2505 (symbol-value 'gnus-agent-expire-current-dirs))))
2507 (if (eq 'DISABLE (gnus-agent-find-parameter group
2508 'agent-enable-expiration))
2509 (gnus-message 5 "Expiry skipping over %s" group)
2510 (gnus-message 5 "Expiring articles in %s" group)
2511 (gnus-agent-load-alist group)
2512 (let* ((info (gnus-get-info group))
2513 (alist gnus-agent-article-alist)
2514 (day (- (time-to-days (current-time))
2515 (gnus-agent-find-parameter group 'agent-days-until-old)))
2516 (specials (if (and alist
2518 ;; This could be a bit of a problem. I need to
2519 ;; keep the last article to avoid refetching
2520 ;; headers when using nntp in the backend. At
2521 ;; the same time, if someone uses a backend
2522 ;; that supports article moving then I may have
2523 ;; to remove the last article to complete the
2524 ;; move. Right now, I'm going to assume that
2525 ;; FORCE overrides specials.
2526 (list (caar (last alist)))))
2527 (unreads ;; Articles that are excluded from the
2528 ;; expiration process
2529 (cond (gnus-agent-expire-all
2530 ;; All articles are marked read by global decree
2533 ;; All articles are marked read by function
2537 ;; Unread articles are marked protected from
2538 ;; expiration Don't call
2539 ;; gnus-list-of-unread-articles as it returns
2540 ;; articles that have not been fetched into the
2543 (gnus-agent-unread-articles group)))
2545 ;; All articles EXCEPT those named by the caller
2546 ;; are protected from expiration
2547 (gnus-sorted-difference
2548 (gnus-uncompress-range
2550 (caar (last alist))))
2551 (sort articles '<)))))
2552 (marked ;; More articles that are exluded from the
2553 ;; expiration process
2554 (cond (gnus-agent-expire-all
2555 ;; All articles are unmarked by global decree
2558 ;; All articles are unmarked by function
2562 ;; All articles may as well be unmarked as the
2563 ;; unreads list already names the articles we are
2567 ;; Ticked and/or dormant articles are excluded
2570 (gnus-uncompress-range
2571 (cdr (assq 'tick (gnus-info-marks info))))
2572 (gnus-uncompress-range
2574 (gnus-info-marks info))))))))
2575 (nov-file (concat dir ".overview"))
2581 ;; The normal article alist contains elements that look like
2582 ;; (article# . fetch_date) I need to combine other
2583 ;; information with this list. For example, a flag indicating
2584 ;; that a particular article MUST BE KEPT. To do this, I'm
2585 ;; going to transform the elements to look like (article#
2586 ;; fetch_date keep_flag NOV_entry_marker) Later, I'll reverse
2587 ;; the process to generate the expired article alist.
2589 ;; Convert the alist elements to (article# fetch_date nil
2591 (setq dlist (mapcar (lambda (e)
2592 (list (car e) (cdr e) nil nil)) alist))
2594 ;; Convert the keep lists to elements that look like (article#
2595 ;; nil keep_flag nil) then append it to the expanded dlist
2596 ;; These statements are sorted by ascending precidence of the
2598 (setq dlist (nconc dlist
2600 (list e nil 'unread nil))
2602 (setq dlist (nconc dlist
2604 (list e nil 'marked nil))
2606 (setq dlist (nconc dlist
2608 (list e nil 'special nil))
2611 (set-buffer overview)
2613 (buffer-disable-undo)
2614 (when (file-exists-p nov-file)
2615 (gnus-message 7 "gnus-agent-expire: Loading overview...")
2616 (nnheader-insert-file-contents nov-file)
2617 (goto-char (point-min))
2620 (while (< (setq p (point)) (point-max))
2622 ;; If I successfully read an integer (the plus zero
2623 ;; ensures a numeric type), prepend a marker entry
2625 (push (list (+ 0 (read (current-buffer))) nil nil
2626 (set-marker (make-marker) p))
2629 (gnus-message 1 "gnus-agent-expire: read error \
2630 occurred when reading expression at %s in %s. Skipping to next \
2631 line." (point) nov-file)))
2632 ;; Whether I succeeded, or failed, it doesn't matter.
2633 ;; Move to the next line then try again.
2637 7 "gnus-agent-expire: Loading overview... Done"))
2638 (set-buffer-modified-p nil)
2640 ;; At this point, all of the information is in dlist. The
2641 ;; only problem is that much of it is spread across multiple
2642 ;; entries. Sort then MERGE!!
2643 (gnus-message 7 "gnus-agent-expire: Sorting entries... ")
2644 ;; If two entries have the same article-number then sort by
2645 ;; ascending keep_flag.
2652 (cond ((< (nth 0 a) (nth 0 b))
2654 ((> (nth 0 a) (nth 0 b))
2657 (let ((a (or (symbol-value (nth 2 a))
2659 (b (or (symbol-value (nth 2 b))
2662 (gnus-message 7 "gnus-agent-expire: Sorting entries... Done")
2663 (gnus-message 7 "gnus-agent-expire: Merging entries... ")
2664 (let ((dlist dlist))
2665 (while (cdr dlist) ; I'm not at the end-of-list
2666 (if (eq (caar dlist) (caadr dlist))
2667 (let ((first (cdr (car dlist)))
2668 (secnd (cdr (cadr dlist))))
2669 (setcar first (or (car first)
2670 (car secnd))) ; fetch_date
2671 (setq first (cdr first)
2673 (setcar first (or (car first)
2674 (car secnd))) ; Keep_flag
2675 (setq first (cdr first)
2677 (setcar first (or (car first)
2678 (car secnd))) ; NOV_entry_marker
2680 (setcdr dlist (cddr dlist)))
2681 (setq dlist (cdr dlist)))))
2682 (gnus-message 7 "gnus-agent-expire: Merging entries... Done")
2684 (let* ((len (float (length dlist)))
2688 (let ((new-completed (truncate (* 100.0
2689 (/ (setq cnt (1+ cnt))
2691 (when (> new-completed completed)
2692 (setq completed new-completed)
2693 (gnus-message 7 "%3d%% completed..." completed)))
2694 (let* ((entry (car dlist))
2695 (article-number (nth 0 entry))
2696 (fetch-date (nth 1 entry))
2697 (keep (nth 2 entry))
2698 (marker (nth 3 entry)))
2701 ;; Kept articles are unread, marked, or special.
2703 (gnus-agent-message 10
2704 "gnus-agent-expire: Article %d: Kept %s article."
2705 article-number keep)
2707 (unless (file-exists-p
2708 (concat dir (number-to-string
2710 (setf (nth 1 entry) nil)
2711 (gnus-agent-message 3 "gnus-agent-expire cleared \
2712 download flag on article %d as the cached article file is missing."
2715 (gnus-message 1 "gnus-agent-expire detected a \
2716 missing NOV entry. Run gnus-agent-regenerate-group to restore it.")))
2717 (gnus-agent-append-to-list
2719 (cons article-number fetch-date)))
2721 ;; The following articles are READ, UNMARKED, and
2722 ;; ORDINARY. See if they can be EXPIRED!!!
2725 ((not (integerp fetch-date))
2726 'read) ;; never fetched article (may expire
2728 ((not (file-exists-p
2729 (concat dir (number-to-string
2731 (setf (nth 1 entry) nil)
2732 'externally-expired) ;; Can't find the cached
2733 ;; article. Handle case
2734 ;; as though this article
2735 ;; was never fetched.
2737 ;; We now have the arrival day, so we see
2738 ;; whether it's old enough to be expired.
2744 ;; I found some reason to expire this entry.
2746 (let ((actions nil))
2747 (when (memq type '(forced expired))
2748 (ignore-errors ; Just being paranoid.
2749 (delete-file (concat dir (number-to-string
2751 (push "expired cached article" actions))
2752 (setf (nth 1 entry) nil)
2756 (push "NOV entry removed" actions)
2760 ;; If considering all articles is set, I can only
2761 ;; expire article IDs that are no longer in the
2762 ;; active range (That is, articles that preceed the
2763 ;; first article in the new alist).
2764 (if (and gnus-agent-consider-all-articles
2765 (>= article-number (car active)))
2766 ;; I have to keep this ID in the alist
2767 (gnus-agent-append-to-list
2768 tail-alist (cons article-number fetch-date))
2769 (push (format "Removed %s article number from \
2770 article alist" type) actions))
2772 (gnus-agent-message 8 "gnus-agent-expire: Article %d: %s"
2774 (mapconcat 'identity actions ", "))))
2777 10 "gnus-agent-expire: Article %d: Article kept as \
2778 expiration tests failed." article-number)
2779 (gnus-agent-append-to-list
2780 tail-alist (cons article-number fetch-date)))
2783 ;; Clean up markers as I want to recycle this buffer
2784 ;; over several groups.
2786 (set-marker marker nil))
2788 (setq dlist (cdr dlist))))
2790 (setq alist (cdr alist))
2792 (let ((inhibit-quit t))
2793 (unless (equal alist gnus-agent-article-alist)
2794 (setq gnus-agent-article-alist alist)
2795 (gnus-agent-save-alist group)
2797 ;; The active list changed, set the agent's active range
2798 ;; to match the beginning of the list.
2800 (setcar active (caar alist))))
2802 (when (buffer-modified-p)
2803 (gnus-make-directory dir)
2804 (write-region-as-coding-system gnus-agent-file-coding-system
2805 (point-min) (point-max) nov-file
2807 ;; clear the modified flag as that I'm not confused by
2808 ;; its status on the next pass through this routine.
2809 (set-buffer-modified-p nil))
2811 (when (eq articles t)
2812 (gnus-summary-update-info))))))))
2814 (defun gnus-agent-expire (&optional articles group force)
2815 "Expire all old articles.
2816 If you want to force expiring of certain articles, this function can
2817 take ARTICLES, GROUP and FORCE parameters as well.
2819 The articles on which the expiration process runs are selected as follows:
2820 if ARTICLES is null, all read and unmarked articles.
2821 if ARTICLES is t, all articles.
2822 if ARTICLES is a list, just those articles.
2823 Setting GROUP will limit expiration to that group.
2824 FORCE is equivalent to setting the expiration predicates to true."
2828 (gnus-agent-expire-group group articles force)
2829 (if (or (not (eq articles t))
2830 (yes-or-no-p "Are you sure that you want to expire all \
2831 articles in every agentized group."))
2832 (let ((methods gnus-agent-covered-methods)
2833 ;; Bind gnus-agent-expire-current-dirs to enable tracking
2834 ;; of agent directories.
2835 (gnus-agent-expire-current-dirs nil)
2836 gnus-command-method overview orig)
2837 (setq overview (gnus-get-buffer-create " *expire overview*"))
2839 (while (setq gnus-command-method (pop methods))
2840 (let ((active-file (gnus-agent-lib-file "active")))
2841 (when (file-exists-p active-file)
2843 (nnheader-insert-file-contents active-file)
2844 (gnus-active-to-gnus-format
2846 (setq orig (gnus-make-hashtable
2847 (count-lines (point-min) (point-max))))))
2848 (dolist (expiring-group (gnus-groups-from-server
2849 gnus-command-method))
2851 (gnus-gethash-safe expiring-group orig)))
2855 (gnus-agent-expire-group-1
2856 expiring-group overview active articles force)))))
2857 (gnus-agent-write-active active-file orig t))))
2858 (kill-buffer overview))
2859 (gnus-agent-expire-unagentized-dirs)
2860 (gnus-message 4 "Expiry...done")))))
2862 (defun gnus-agent-expire-unagentized-dirs ()
2863 (when (and gnus-agent-expire-unagentized-dirs
2864 (boundp 'gnus-agent-expire-current-dirs))
2865 (let* ((keep (gnus-make-hashtable))
2866 ;; Formally bind gnus-agent-expire-current-dirs so that the
2867 ;; compiler will not complain about free references.
2868 (gnus-agent-expire-current-dirs
2869 (symbol-value 'gnus-agent-expire-current-dirs))
2872 (gnus-sethash gnus-agent-directory t keep)
2873 (while gnus-agent-expire-current-dirs
2874 (setq dir (pop gnus-agent-expire-current-dirs))
2875 (when (and (stringp dir)
2876 (file-directory-p dir))
2877 (while (not (gnus-gethash dir keep))
2878 (gnus-sethash dir t keep)
2879 (setq dir (file-name-directory (directory-file-name dir))))))
2886 "Given a directory, check it and its subdirectories for
2887 membership in the keep hash. If it isn't found, add
2889 (let ((files (directory-files d))
2891 (while (setq file (pop files))
2892 (cond ((equal file ".") ; Ignore self
2894 ((equal file "..") ; Ignore parent
2896 ((equal file ".overview")
2897 ;; Directory must contain .overview to be
2898 ;; agent's cache of a group.
2899 (let ((d (file-name-as-directory d))
2901 ;; Search ancestor's for last directory NOT
2902 ;; found in keep hash.
2903 (while (not (gnus-gethash
2904 (setq d (file-name-directory d)) keep))
2906 d (directory-file-name d)))
2907 ;; if ANY ancestor was NOT in keep hash and
2908 ;; it it's already in to-remove, add it to
2911 (not (member r to-remove)))
2912 (push r to-remove))))
2913 ((file-directory-p (setq file (nnheader-concat d file)))
2914 (funcall checker file)))))))))
2915 (funcall checker (expand-file-name gnus-agent-directory))
2917 (when (and to-remove
2918 (or gnus-expert-user
2920 "gnus-agent-expire has identified local directories that are\
2921 not currently required by any agentized group. Do you wish to consider\
2924 (let ((dir (pop to-remove)))
2925 (if (gnus-y-or-n-p (format "Delete %s?" dir))
2926 (let* (delete-recursive
2931 (if (file-directory-p f-or-d)
2933 (delete-directory f-or-d)
2936 (or (member f '("." ".."))
2937 (funcall delete-recursive
2940 (directory-files f-or-d))
2941 (delete-directory f-or-d)))
2942 (delete-file f-or-d)))))))
2943 (funcall delete-recursive dir))))))))))
2946 (defun gnus-agent-batch ()
2947 "Start Gnus, send queue and fetch session."
2949 (let ((init-file-user "")
2950 (gnus-always-read-dribble-file t))
2952 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
2953 (gnus-group-send-queue)
2954 (gnus-agent-fetch-session)))
2956 (defun gnus-agent-unread-articles (group)
2957 (let* ((read (gnus-info-read (gnus-get-info group)))
2958 (known (gnus-agent-load-alist group))
2960 (tail-unread unread))
2961 (while (and known read)
2962 (let ((candidate (car (pop known))))
2963 (while (let* ((range (car read))
2964 (min (if (numberp range) range (car range)))
2965 (max (if (numberp range) range (cdr range))))
2966 (cond ((or (not min)
2968 (gnus-agent-append-to-list tail-unread candidate)
2973 (gnus-agent-append-to-list tail-unread (car (pop known))))
2976 (defun gnus-agent-uncached-articles (articles group &optional cached-header)
2977 "Restrict ARTICLES to numbers already fetched.
2978 Returns a sublist of ARTICLES that excludes thos article ids in GROUP
2979 that have already been fetched.
2980 If CACHED-HEADER is nil, articles are only excluded if the article itself
2983 ;; Logically equivalent to: (gnus-sorted-difference articles (mapcar
2984 ;; 'car gnus-agent-article-alist))
2986 ;; Functionally, I don't need to construct a temp list using mapcar.
2988 (if (and (or gnus-agent-cache (not gnus-plugged))
2989 (gnus-agent-load-alist group))
2990 (let* ((ref gnus-agent-article-alist)
2992 (uncached (list nil))
2993 (tail-uncached uncached))
2994 (while (and ref arts)
2995 (let ((v1 (car arts))
2997 (cond ((< v1 v2) ; v1 does not appear in the reference list
2998 (gnus-agent-append-to-list tail-uncached v1)
3001 (unless (or cached-header (cdar ref)) ; v1 is already cached
3002 (gnus-agent-append-to-list tail-uncached v1))
3005 (t ; reference article (v2) preceeds the list being filtered
3008 (gnus-agent-append-to-list tail-uncached (pop arts)))
3010 ;; if gnus-agent-load-alist fails, no articles are cached.
3013 (defun gnus-agent-retrieve-headers (articles group &optional fetch-old)
3015 (gnus-agent-create-buffer)
3016 (let ((gnus-decode-encoded-word-function 'identity)
3017 (file (gnus-agent-article-name ".overview" group))
3018 cached-articles uncached-articles)
3019 (gnus-make-directory (nnheader-translate-file-chars
3020 (file-name-directory file) t))
3022 ;; Populate temp buffer with known headers
3023 (when (file-exists-p file)
3024 (with-current-buffer gnus-agent-overview-buffer
3026 (let ((nnheader-file-coding-system
3027 gnus-agent-file-coding-system))
3028 (nnheader-insert-nov-file file (car articles)))))
3030 (if (setq uncached-articles (gnus-agent-uncached-articles articles group
3033 ;; Populate nntp-server-buffer with uncached headers
3034 (set-buffer nntp-server-buffer)
3036 (cond ((not (eq 'nov (let (gnus-agent) ; Turn off agent
3037 (gnus-retrieve-headers
3038 uncached-articles group fetch-old))))
3039 (nnvirtual-convert-headers))
3040 ((eq 'nntp (car gnus-current-select-method))
3041 ;; The author of gnus-get-newsgroup-headers-xover
3042 ;; reports that the XOVER command is commonly
3043 ;; unreliable. The problem is that recently
3044 ;; posted articles may not be entered into the
3045 ;; NOV database in time to respond to my XOVER
3048 ;; I'm going to use his assumption that the NOV
3049 ;; database is updated in order of ascending
3050 ;; article ID. Therefore, a response containing
3051 ;; article ID N implies that all articles from 1
3052 ;; to N-1 are up-to-date. Therefore, missing
3053 ;; articles in that range have expired.
3055 (set-buffer nntp-server-buffer)
3056 (let* ((fetched-articles (list nil))
3057 (tail-fetched-articles fetched-articles)
3058 (min (cond ((numberp fetch-old)
3059 (max 1 (- (car articles) fetch-old)))
3064 (max (car (last articles))))
3066 ;; Get the list of articles that were fetched
3067 (goto-char (point-min))
3068 (let ((pm (point-max)))
3069 (while (< (point) pm)
3070 (when (looking-at "[0-9]+\t")
3071 (gnus-agent-append-to-list
3072 tail-fetched-articles
3073 (read (current-buffer))))
3076 ;; Clip this list to the headers that will
3077 ;; actually be returned
3078 (setq fetched-articles (gnus-list-range-intersection
3079 (cdr fetched-articles)
3082 ;; Clip the uncached articles list to exclude
3083 ;; IDs after the last FETCHED header. The
3084 ;; excluded IDs may be fetchable using HEAD.
3085 (if (car tail-fetched-articles)
3086 (setq uncached-articles
3087 (gnus-list-range-intersection
3089 (cons (car uncached-articles)
3090 (car tail-fetched-articles)))))
3092 ;; Create the list of articles that were
3093 ;; "successfully" fetched. Success, in this
3094 ;; case, means that the ID should not be
3095 ;; fetched again. In the case of an expired
3096 ;; article, the header will not be fetched.
3097 (setq uncached-articles
3098 (gnus-sorted-nunion fetched-articles
3102 ;; Erase the temp buffer
3103 (set-buffer gnus-agent-overview-buffer)
3106 ;; Copy the nntp-server-buffer to the temp buffer
3107 (set-buffer nntp-server-buffer)
3108 (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
3110 ;; Merge the temp buffer with the known headers (found on
3111 ;; disk in FILE) into the nntp-server-buffer
3112 (when (and uncached-articles (file-exists-p file))
3113 (gnus-agent-braid-nov group uncached-articles file))
3115 ;; Save the new set of known headers to FILE
3116 (set-buffer nntp-server-buffer)
3117 (gnus-agent-check-overview-buffer)
3118 (write-region-as-coding-system
3119 gnus-agent-file-coding-system
3120 (point-min) (point-max) file nil 'silent)
3122 ;; Update the group's article alist to include the newly
3123 ;; fetched articles.
3124 (gnus-agent-load-alist group)
3125 (gnus-agent-save-alist group uncached-articles nil)
3128 ;; Copy the temp buffer to the nntp-server-buffer
3129 (set-buffer nntp-server-buffer)
3131 (insert-buffer-substring gnus-agent-overview-buffer)))
3134 (not (numberp fetch-old)))
3135 t ; Don't remove anything.
3136 (nnheader-nov-delete-outside-range
3137 (if fetch-old (max 1 (- (car articles) fetch-old))
3139 (car (last articles)))
3144 (defun gnus-agent-request-article (article group)
3145 "Retrieve ARTICLE in GROUP from the agent cache."
3146 (when (and gnus-agent
3147 (or gnus-agent-cache
3150 (let* ((gnus-command-method (gnus-find-method-for-group group))
3151 (file (gnus-agent-article-name (number-to-string article) group))
3152 (buffer-read-only nil))
3153 (when (and (file-exists-p file)
3154 (> (nth 7 (file-attributes file)) 0))
3156 (gnus-kill-all-overlays)
3157 (insert-file-contents-as-coding-system gnus-cache-coding-system file)
3160 (defun gnus-agent-regenerate-group (group &optional reread)
3162 If REREAD is t, all articles in the .overview are marked as unread.
3163 If REREAD is not nil, downloaded articles are marked as unread."
3165 (list (let ((def (or (gnus-group-group-name)
3166 gnus-newsgroup-name)))
3167 (let ((select (read-string (if def
3168 (concat "Group Name ("
3171 (if (and (equal "" select)
3177 "Reread (nil)? (t=>all, nil=>none, some=>all downloaded): "))))
3178 (gnus-message 5 "Regenerating in %s" group)
3179 (let* ((gnus-command-method (or gnus-command-method
3180 (gnus-find-method-for-group group)))
3181 (file (gnus-agent-article-name ".overview" group))
3182 (dir (file-name-directory file))
3184 (downloaded (if (file-exists-p dir)
3185 (sort (mapcar (lambda (name) (string-to-int name))
3186 (directory-files dir nil "^[0-9]+$" t))
3188 (progn (gnus-make-directory dir) nil)))
3193 (mm-with-unibyte-buffer
3194 (if (file-exists-p file)
3195 (let ((nnheader-file-coding-system
3196 gnus-agent-file-coding-system))
3197 (nnheader-insert-file-contents file)))
3198 (set-buffer-modified-p nil)
3200 ;; Load the article IDs found in the overview file. As a
3201 ;; side-effect, validate the file contents.
3205 (goto-char (point-min))
3206 (while (< (point) (point-max))
3207 (cond ((and (looking-at "[0-9]+\t")
3208 (<= (- (match-end 0) (match-beginning 0)) 9))
3209 (push (read (current-buffer)) nov-arts)
3211 (let ((l1 (car nov-arts))
3212 (l2 (cadr nov-arts)))
3216 (gnus-message 3 "gnus-agent-regenerate-group: NOV\
3217 entries are NOT in ascending order.")
3218 ;; Don't sort now as I haven't verified
3219 ;; that every line begins with a number
3223 (gnus-message 4 "gnus-agent-regenerate-group: NOV\
3224 entries contained duplicate of article %s. Duplicate deleted." l1)
3228 (gnus-message 1 "gnus-agent-regenerate-group: NOV\
3229 entries contained line that did not begin with an article number. Deleted\
3231 (gnus-delete-line))))
3234 (gnus-message 5 "gnus-agent-regenerate-group: Sorting NOV\
3235 entries into ascending order.")
3236 (sort-numeric-fields 1 (point-min) (point-max))
3237 (setq nov-arts nil)))))
3238 (gnus-agent-check-overview-buffer)
3240 ;; Construct a new article alist whose nodes match every header
3241 ;; in the .overview file. As a side-effect, missing headers are
3242 ;; reconstructed from the downloaded article file.
3243 (while (or downloaded nov-arts)
3244 (cond ((and downloaded
3246 (> (car downloaded) (car nov-arts))))
3247 ;; This entry is missing from the overview file
3248 (gnus-message 3 "Regenerating NOV %s %d..." group
3250 (let ((file (concat dir (number-to-string (car downloaded)))))
3251 (mm-with-unibyte-buffer
3252 (nnheader-insert-file-contents file)
3253 (nnheader-remove-body)
3254 (setq header (nnheader-parse-naked-head)))
3255 (mail-header-set-number header (car downloaded))
3257 (let ((key (concat "^" (int-to-string (car nov-arts))
3259 (or (re-search-backward key nil t)
3260 (re-search-forward key))
3262 (goto-char (point-min)))
3263 (nnheader-insert-nov header))
3264 (setq nov-arts (cons (car downloaded) nov-arts)))
3265 ((eq (car downloaded) (car nov-arts))
3266 ;; This entry in the overview has been downloaded
3267 (push (cons (car downloaded)
3269 (nth 5 (file-attributes
3270 (concat dir (number-to-string
3271 (car downloaded))))))) alist)
3275 ;; This entry in the overview has not been downloaded
3276 (push (cons (car nov-arts) nil) alist)
3279 ;; When gnus-agent-consider-all-articles is set,
3280 ;; gnus-agent-regenerate-group should NOT remove article IDs from
3281 ;; the alist. Those IDs serve as markers to indicate that an
3282 ;; attempt has been made to fetch that article's header.
3284 ;; When gnus-agent-consider-all-articles is NOT set,
3285 ;; gnus-agent-regenerate-group can remove the article ID of every
3286 ;; article (with the exception of the last ID in the list - it's
3287 ;; special) that no longer appears in the overview. In this
3288 ;; situtation, the last article ID in the list implies that it,
3289 ;; and every article ID preceeding it, have been fetched from the
3291 (if gnus-agent-consider-all-articles
3292 ;; Restore all article IDs that were not found in the overview file.
3293 (let* ((n (cons nil alist))
3295 (o (gnus-agent-load-alist group)))
3297 (let ((nID (caadr n))
3300 (setq n (setcdr n (list (list oID))))
3303 (setcdr n (cons (list oID) (cdr n)))
3310 (setq alist (cdr merged)))
3311 ;; Restore the last article ID if it is not already in the new alist
3312 (let ((n (last alist))
3313 (o (last (gnus-agent-load-alist group))))
3317 (push (cons (caar o) nil) alist))
3318 ((< (caar n) (caar o))
3319 (setcdr n (list (car o)))))))
3321 (let ((inhibit-quit t))
3322 (if (setq regenerated (buffer-modified-p))
3323 (write-region-as-coding-system
3324 gnus-agent-file-coding-system
3325 (point-min) (point-max) file nil 'silent))
3327 (setq regenerated (or regenerated
3328 (and reread gnus-agent-article-alist)
3329 (not (equal alist gnus-agent-article-alist)))
3332 (setq gnus-agent-article-alist alist)
3335 (gnus-agent-save-alist group)))
3338 (when (and reread gnus-agent-article-alist)
3339 (gnus-make-ascending-articles-unread
3341 (delq nil (mapcar (function (lambda (c)
3342 (cond ((eq reread t)
3346 gnus-agent-article-alist)))
3348 (when (gnus-buffer-live-p gnus-group-buffer)
3349 (gnus-group-update-group group t)
3353 (gnus-message 5 nil)
3357 (defun gnus-agent-regenerate (&optional clean reread)
3358 "Regenerate all agent covered files.
3359 If CLEAN, don't read existing active files."
3362 (gnus-message 4 "Regenerating Gnus agent files...")
3363 (dolist (gnus-command-method gnus-agent-covered-methods)
3364 (let ((active-file (gnus-agent-lib-file "active"))
3365 active-hashtb active-changed
3367 (gnus-make-directory (file-name-directory active-file))
3369 (setq active-hashtb (gnus-make-hashtable 1000))
3370 (mm-with-unibyte-buffer
3371 (if (file-exists-p active-file)
3372 (let ((nnheader-file-coding-system
3373 gnus-agent-file-coding-system))
3374 (nnheader-insert-file-contents active-file))
3375 (setq active-changed t))
3376 (gnus-active-to-gnus-format
3377 nil (setq active-hashtb
3378 (gnus-make-hashtable
3379 (count-lines (point-min) (point-max)))))))
3380 (dolist (group (gnus-groups-from-server gnus-command-method))
3381 (setq regenerated (or (gnus-agent-regenerate-group group reread)
3383 (let ((min (or (caar gnus-agent-article-alist) 1))
3384 (max (or (caar (last gnus-agent-article-alist)) 0))
3385 (active (gnus-gethash-safe (gnus-group-real-name group)
3387 (read (gnus-info-read (gnus-get-info group))))
3390 (setq active (cons min max)
3392 (gnus-sethash group active active-hashtb))
3393 (when (> (car active) min)
3395 (setq active-changed t))
3396 (when (< (cdr active) max)
3398 (setq active-changed t)))))
3399 (when active-changed
3400 (setq regenerated t)
3401 (gnus-message 4 "Regenerate %s" active-file)
3402 (let ((nnmail-active-file-coding-system
3403 gnus-agent-file-coding-system))
3404 (gnus-write-active-file active-file active-hashtb)))))
3405 (gnus-message 4 "Regenerating Gnus agent files...done")
3408 (defun gnus-agent-go-online (&optional force)
3409 "Switch servers into online status."
3410 (interactive (list t))
3411 (dolist (server gnus-opened-servers)
3412 (when (eq (nth 1 server) 'offline)
3413 (if (if (eq force 'ask)
3415 (format "Switch %s:%s into online status? "
3416 (caar server) (cadar server)))
3418 (setcar (nthcdr 1 server) 'close)))))
3420 (defun gnus-agent-toggle-group-plugged (group)
3421 "Toggle the status of the server of the current group."
3422 (interactive (list (gnus-group-group-name)))
3423 (let* ((method (gnus-find-method-for-group group))
3424 (status (cadr (assoc method gnus-opened-servers))))
3425 (if (eq status 'offline)
3426 (gnus-server-set-status method 'closed)
3427 (gnus-close-server method)
3428 (gnus-server-set-status method 'offline))
3429 (message "Turn %s:%s from %s to %s." (car method) (cadr method)
3430 (if (eq status 'offline) 'offline 'online)
3431 (if (eq status 'offline) 'online 'offline))))
3433 (defun gnus-agent-group-covered-p (group)
3434 (member (gnus-group-method group)
3435 gnus-agent-covered-methods))
3437 (add-hook 'gnus-group-prepare-hook
3441 (when (listp gnus-agent-expire-days)
3444 (gnus-message 1 "WARNING: gnus-agent-expire-days no longer\
3445 supports being set to a list.")(sleep-for 3)
3446 (gnus-message 1 "Change your configuration to set it to an\
3447 integer.")(sleep-for 3)
3448 (gnus-message 1 "I am now setting group parameters on each\
3449 group to match the configuration that the list offered.")
3452 (let ((groups (gnus-group-listed-groups)))
3454 (let* ((group (pop groups))
3455 (days gnus-agent-expire-days)
3458 (when (eq 0 (string-match
3461 (throw 'found (cadar days)))
3465 (gnus-group-set-parameter group 'agent-days-until-old
3468 (let ((h gnus-group-prepare-hook))
3470 (let ((func (pop h)))
3471 (when (and (listp func)
3472 (eq (cadr (caddr func)) 'gnus-agent-do-once))
3473 (remove-hook 'gnus-group-prepare-hook func)
3476 (gnus-message 1 "I have finished setting group parameters on\
3477 each group. You may now customize your groups and/or topics to control the\
3480 (provide 'gnus-agent)
3482 ;;; gnus-agent.el ends here