1 ;;; gnus-agent.el --- unplugged support for 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 ;; This file is part of GNU Emacs.
8 ;; GNU Emacs is free software; you can redistribute it and/or modify
9 ;; it under the terms of the GNU General Public License as published by
10 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; GNU Emacs is distributed in the hope that it will be useful,
14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 ;; GNU General Public License for more details.
18 ;; You should have received a copy of the GNU General Public License
19 ;; along with GNU Emacs; see the file COPYING. If not, write to the
20 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 ;; Boston, MA 02111-1307, USA.
35 (if (featurep 'xemacs)
41 (autoload 'gnus-server-update-server "gnus-srvr")
42 (autoload 'gnus-agent-customize-category "gnus-cus")
45 (defcustom gnus-agent-directory (nnheader-concat gnus-directory "agent/")
46 "Where the Gnus agent will store its files."
50 (defcustom gnus-agent-plugged-hook nil
51 "Hook run when plugging into the network."
55 (defcustom gnus-agent-unplugged-hook nil
56 "Hook run when unplugging from the network."
60 (defcustom gnus-agent-handle-level gnus-level-subscribed
61 "Groups on levels higher than this variable will be ignored by the Agent."
65 (defcustom gnus-agent-expire-days 7
66 "Read articles older than this will be expired.
67 This can also be a list of regexp/day pairs. The regexps will be
68 matched against group names."
70 :type '(choice (number :tag "days")
71 (sexp :tag "List" nil)))
73 (defcustom gnus-agent-expire-all nil
74 "If non-nil, also expire unread, ticked and dormant articles.
75 If nil, only read articles will be expired."
79 (defcustom gnus-agent-group-mode-hook nil
80 "Hook run in Agent group minor modes."
84 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
85 (when (featurep 'xemacs)
86 (add-hook 'gnus-agent-group-mode-hook 'gnus-xmas-agent-group-menu-add))
88 (defcustom gnus-agent-summary-mode-hook nil
89 "Hook run in Agent summary minor modes."
93 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
94 (when (featurep 'xemacs)
95 (add-hook 'gnus-agent-summary-mode-hook 'gnus-xmas-agent-summary-menu-add))
97 (defcustom gnus-agent-server-mode-hook nil
98 "Hook run in Agent summary minor modes."
102 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
103 (when (featurep 'xemacs)
104 (add-hook 'gnus-agent-server-mode-hook 'gnus-xmas-agent-server-menu-add))
106 (defcustom gnus-agent-confirmation-function 'y-or-n-p
107 "Function to confirm when error happens."
112 (defcustom gnus-agent-synchronize-flags 'ask
113 "Indicate if flags are synchronized when you plug in.
114 If this is `ask' the hook will query the user."
116 :type '(choice (const :tag "Always" t)
117 (const :tag "Never" nil)
118 (const :tag "Ask" ask))
121 (defcustom gnus-agent-go-online 'ask
122 "Indicate if offline servers go online when you plug in.
123 If this is `ask' the hook will query the user."
125 :type '(choice (const :tag "Always" t)
126 (const :tag "Never" nil)
127 (const :tag "Ask" ask))
130 (defcustom gnus-agent-mark-unread-after-downloaded t
131 "Indicate whether to mark articles unread after downloaded."
136 (defcustom gnus-agent-download-marks '(download)
137 "Marks for downloading."
139 :type '(repeat (symbol :tag "Mark"))
142 (defcustom gnus-agent-consider-all-articles nil
143 "If non-nil, consider also the read articles for downloading."
148 (defcustom gnus-agent-max-fetch-size 10000000 ;; 10 Mb
149 "Chunk size for `gnus-agent-fetch-session'.
150 The function will split its article fetches into chunks smaller than
155 (defcustom gnus-agent-enable-expiration 'ENABLE
156 "The default expiration state for each group.
157 When set to ENABLE, the default, `gnus-agent-expire' will expire old
158 contents from a group's local storage. This value may be overridden
159 to disable expiration in specific categories, topics, and groups. Of
160 course, you could change gnus-agent-enable-expiration to DISABLE then
161 enable expiration per categories, topics, and groups."
163 :type '(radio (const :format "Enable " ENABLE)
164 (const :format "Disable " DISABLE)))
166 ;;; Internal variables
168 (defvar gnus-agent-history-buffers nil)
169 (defvar gnus-agent-buffer-alist nil)
170 (defvar gnus-agent-article-alist nil
171 "An assoc list identifying the articles whose headers have been fetched.
172 If successfully fetched, these headers will be stored in the group's overview
173 file. The key of each assoc pair is the article ID, the value of each assoc
174 pair is a flag indicating whether the identified article has been downloaded
175 \(gnus-agent-fetch-articles sets the value to the day of the download).
177 1) The last element of this list can not be expired as some
178 routines (for example, get-agent-fetch-headers) use the last
179 value to track which articles have had their headers retrieved.
180 2) The function `gnus-agent-regenerate' may destructively modify the value.")
181 (defvar gnus-agent-group-alist nil)
182 (defvar gnus-category-alist nil)
183 (defvar gnus-agent-current-history nil)
184 (defvar gnus-agent-overview-buffer nil)
185 (defvar gnus-category-predicate-cache nil)
186 (defvar gnus-category-group-cache nil)
187 (defvar gnus-agent-spam-hashtb nil)
188 (defvar gnus-agent-file-name nil)
189 (defvar gnus-agent-send-mail-function nil)
190 (defvar gnus-agent-file-coding-system 'raw-text)
191 (defvar gnus-agent-file-loading-cache nil)
192 (defvar gnus-agent-file-header-cache nil)
194 (defvar gnus-agent-auto-agentize-methods '(nntp nnimap)
195 "Initially, all servers from these methods are agentized.
196 The user may remove or add servers using the Server buffer. See Info
197 node `(gnus)Server Buffer'.")
200 (defvar gnus-headers)
207 (defun gnus-open-agent ()
209 (gnus-agent-read-servers)
211 (gnus-agent-create-buffer)
212 (add-hook 'gnus-group-mode-hook 'gnus-agent-mode)
213 (add-hook 'gnus-summary-mode-hook 'gnus-agent-mode)
214 (add-hook 'gnus-server-mode-hook 'gnus-agent-mode))
216 (defun gnus-agent-create-buffer ()
217 (if (gnus-buffer-live-p gnus-agent-overview-buffer)
219 (setq gnus-agent-overview-buffer
220 (gnus-get-buffer-create " *Gnus agent overview*"))
221 (with-current-buffer gnus-agent-overview-buffer
222 (mm-enable-multibyte))
225 (gnus-add-shutdown 'gnus-close-agent 'gnus)
227 (defun gnus-close-agent ()
228 (setq gnus-category-predicate-cache nil
229 gnus-category-group-cache nil
230 gnus-agent-spam-hashtb nil)
231 (gnus-kill-buffer gnus-agent-overview-buffer))
234 ;;; Utility functions
237 (defun gnus-agent-read-file (file)
238 "Load FILE and do a `read' there."
241 (nnheader-insert-file-contents file)
242 (goto-char (point-min))
243 (read (current-buffer)))))
245 (defsubst gnus-agent-method ()
246 (concat (symbol-name (car gnus-command-method)) "/"
247 (if (equal (cadr gnus-command-method) "")
249 (cadr gnus-command-method))))
251 (defsubst gnus-agent-directory ()
252 "The name of the Gnus agent directory."
253 (nnheader-concat gnus-agent-directory
254 (nnheader-translate-file-chars (gnus-agent-method)) "/"))
256 (defun gnus-agent-lib-file (file)
257 "The full name of the Gnus agent library FILE."
258 (expand-file-name file
259 (file-name-as-directory
260 (expand-file-name "agent.lib" (gnus-agent-directory)))))
262 (defun gnus-agent-cat-set-property (category property value)
264 (setcdr (or (assq property category)
265 (let ((cell (cons property nil)))
266 (setcdr category (cons cell (cdr category)))
268 (let ((category category))
269 (while (cond ((eq property (caadr category))
270 (setcdr category (cddr category))
273 (setq category (cdr category)))))))
276 (defmacro gnus-agent-cat-defaccessor (name prop-name)
277 "Define accessor and setter methods for manipulating a list of the form
278 \(NAME (PROPERTY1 VALUE1) ... (PROPERTY_N VALUE_N)).
279 Given the call (gnus-agent-cat-defaccessor func PROPERTY1), the list may be
280 manipulated as follows:
281 (func LIST): Returns VALUE1
282 (setf (func LIST) NEW_VALUE1): Replaces VALUE1 with NEW_VALUE1."
283 `(progn (defmacro ,name (category)
284 (list (quote cdr) (list (quote assq)
285 (quote (quote ,prop-name)) category)))
287 (define-setf-method ,name (category)
288 (let* ((--category--temp-- (gensym "--category--"))
289 (--value--temp-- (gensym "--value--")))
290 (list (list --category--temp--) ; temporary-variables
291 (list category) ; value-forms
292 (list --value--temp--) ; store-variables
293 (let* ((category --category--temp--) ; store-form
294 (value --value--temp--))
295 (list (quote gnus-agent-cat-set-property)
297 (quote (quote ,prop-name))
299 (list (quote ,name) --category--temp--) ; access-form
302 (defmacro gnus-agent-cat-name (category)
305 (gnus-agent-cat-defaccessor
306 gnus-agent-cat-days-until-old agent-days-until-old)
307 (gnus-agent-cat-defaccessor
308 gnus-agent-cat-enable-expiration agent-enable-expiration)
309 (gnus-agent-cat-defaccessor
310 gnus-agent-cat-groups agent-groups)
311 (gnus-agent-cat-defaccessor
312 gnus-agent-cat-high-score agent-high-score)
313 (gnus-agent-cat-defaccessor
314 gnus-agent-cat-length-when-long agent-length-when-long)
315 (gnus-agent-cat-defaccessor
316 gnus-agent-cat-length-when-short agent-length-when-short)
317 (gnus-agent-cat-defaccessor
318 gnus-agent-cat-low-score agent-low-score)
319 (gnus-agent-cat-defaccessor
320 gnus-agent-cat-predicate agent-predicate)
321 (gnus-agent-cat-defaccessor
322 gnus-agent-cat-score-file agent-score-file)
324 (defsetf gnus-agent-cat-groups (category) (groups)
325 (list 'gnus-agent-set-cat-groups category groups))
327 (defun gnus-agent-set-cat-groups (category groups)
328 (unless (eq groups 'ignore)
330 (old-g (gnus-agent-cat-groups category)))
331 (cond ((eq new-g old-g)
332 ;; gnus-agent-add-group is fiddling with the group
333 ;; list. Still, Im done.
336 ((eq new-g (cdr old-g))
337 ;; gnus-agent-add-group is fiddling with the group list
338 (setcdr (or (assq 'agent-groups category)
339 (let ((cell (cons 'agent-groups nil)))
340 (setcdr category (cons cell (cdr category)))
343 (let ((groups groups))
345 (let* ((group (pop groups))
346 (old-category (gnus-group-category group)))
347 (if (eq category old-category)
349 (setf (gnus-agent-cat-groups old-category)
350 (delete group (gnus-agent-cat-groups
352 ;; Purge cache as preceeding loop invalidated it.
353 (setq gnus-category-group-cache nil))
355 (setcdr (or (assq 'agent-groups category)
356 (let ((cell (cons 'agent-groups nil)))
357 (setcdr category (cons cell (cdr category)))
360 (defsubst gnus-agent-cat-make (name)
361 (list name '(agent-predicate . false)))
363 ;;; Fetching setup functions.
365 (defun gnus-agent-start-fetch ()
366 "Initialize data structures for efficient fetching."
367 (gnus-agent-create-buffer))
369 (defun gnus-agent-stop-fetch ()
370 "Save all data structures and clean up."
371 (setq gnus-agent-spam-hashtb nil)
373 (set-buffer nntp-server-buffer)
376 (defmacro gnus-agent-with-fetch (&rest forms)
379 (let ((gnus-agent-fetching t))
380 (gnus-agent-start-fetch)
382 (gnus-agent-stop-fetch)))
384 (put 'gnus-agent-with-fetch 'lisp-indent-function 0)
385 (put 'gnus-agent-with-fetch 'edebug-form-spec '(body))
387 (defmacro gnus-agent-append-to-list (tail value)
388 `(setq ,tail (setcdr ,tail (cons ,value nil))))
394 (defvar gnus-agent-mode-hook nil
395 "Hook run when installing agent mode.")
397 (defvar gnus-agent-mode nil)
398 (defvar gnus-agent-mode-status '(gnus-agent-mode " Plugged"))
400 (defun gnus-agent-mode ()
401 "Minor mode for providing a agent support in Gnus buffers."
402 (let* ((buffer (progn (string-match "^gnus-\\(.*\\)-mode$"
403 (symbol-name major-mode))
404 (match-string 1 (symbol-name major-mode))))
405 (mode (intern (format "gnus-agent-%s-mode" buffer))))
406 (set (make-local-variable 'gnus-agent-mode) t)
408 (set (make-local-variable mode) t)
410 (when (gnus-visual-p 'agent-menu 'menu)
411 (funcall (intern (format "gnus-agent-%s-make-menu-bar" buffer))))
412 (unless (assq 'gnus-agent-mode minor-mode-alist)
413 (push gnus-agent-mode-status minor-mode-alist))
414 (unless (assq mode minor-mode-map-alist)
415 (push (cons mode (symbol-value (intern (format "gnus-agent-%s-mode-map"
417 minor-mode-map-alist))
418 (when (eq major-mode 'gnus-group-mode)
419 (let ((init-plugged gnus-plugged))
420 ;; g-a-t-p does nothing when gnus-plugged isn't changed.
421 ;; Therefore, make certain that the current value does not
422 ;; match the desired initial value.
423 (setq gnus-plugged :unknown)
424 (gnus-agent-toggle-plugged init-plugged)))
425 (gnus-run-hooks 'gnus-agent-mode-hook
426 (intern (format "gnus-agent-%s-mode-hook" buffer)))))
428 (defvar gnus-agent-group-mode-map (make-sparse-keymap))
429 (gnus-define-keys gnus-agent-group-mode-map
430 "Ju" gnus-agent-fetch-groups
431 "Jc" gnus-enter-category-buffer
432 "Jj" gnus-agent-toggle-plugged
433 "Js" gnus-agent-fetch-session
434 "JY" gnus-agent-synchronize-flags
435 "JS" gnus-group-send-queue
436 "Ja" gnus-agent-add-group
437 "Jr" gnus-agent-remove-group
438 "Jo" gnus-agent-toggle-group-plugged)
440 (defun gnus-agent-group-make-menu-bar ()
441 (unless (boundp 'gnus-agent-group-menu)
443 gnus-agent-group-menu gnus-agent-group-mode-map ""
445 ["Toggle plugged" gnus-agent-toggle-plugged t]
446 ["Toggle group plugged" gnus-agent-toggle-group-plugged t]
447 ["List categories" gnus-enter-category-buffer t]
448 ["Add (current) group to category" gnus-agent-add-group t]
449 ["Remove (current) group from category" gnus-agent-remove-group t]
450 ["Send queue" gnus-group-send-queue gnus-plugged]
452 ["All" gnus-agent-fetch-session gnus-plugged]
453 ["Group" gnus-agent-fetch-group gnus-plugged])
454 ["Synchronize flags" gnus-agent-synchronize-flags t]
457 (defvar gnus-agent-summary-mode-map (make-sparse-keymap))
458 (gnus-define-keys gnus-agent-summary-mode-map
459 "Jj" gnus-agent-toggle-plugged
460 "Ju" gnus-agent-summary-fetch-group
461 "JS" gnus-agent-fetch-group
462 "Js" gnus-agent-summary-fetch-series
463 "J#" gnus-agent-mark-article
464 "J\M-#" gnus-agent-unmark-article
465 "@" gnus-agent-toggle-mark
466 "Jc" gnus-agent-catchup)
468 (defun gnus-agent-summary-make-menu-bar ()
469 (unless (boundp 'gnus-agent-summary-menu)
471 gnus-agent-summary-menu gnus-agent-summary-mode-map ""
473 ["Toggle plugged" gnus-agent-toggle-plugged t]
474 ["Mark as downloadable" gnus-agent-mark-article t]
475 ["Unmark as downloadable" gnus-agent-unmark-article t]
476 ["Toggle mark" gnus-agent-toggle-mark t]
477 ["Fetch downloadable" gnus-agent-summary-fetch-group t]
478 ["Catchup undownloaded" gnus-agent-catchup t]))))
480 (defvar gnus-agent-server-mode-map (make-sparse-keymap))
481 (gnus-define-keys gnus-agent-server-mode-map
482 "Jj" gnus-agent-toggle-plugged
483 "Ja" gnus-agent-add-server
484 "Jr" gnus-agent-remove-server)
486 (defun gnus-agent-server-make-menu-bar ()
487 (unless (boundp 'gnus-agent-server-menu)
489 gnus-agent-server-menu gnus-agent-server-mode-map ""
491 ["Toggle plugged" gnus-agent-toggle-plugged t]
492 ["Add" gnus-agent-add-server t]
493 ["Remove" gnus-agent-remove-server t]))))
495 (defun gnus-agent-make-mode-line-string (string mouse-button mouse-func)
496 (if (and (fboundp 'propertize)
497 (fboundp 'make-mode-line-mouse-map))
498 (propertize string 'local-map
499 (make-mode-line-mouse-map mouse-button mouse-func))
502 (defun gnus-agent-toggle-plugged (set-to)
503 "Toggle whether Gnus is unplugged or not."
504 (interactive (list (not gnus-plugged)))
505 (cond ((eq set-to gnus-plugged)
508 (setq gnus-plugged set-to)
509 (gnus-run-hooks 'gnus-agent-plugged-hook)
510 (setcar (cdr gnus-agent-mode-status)
511 (gnus-agent-make-mode-line-string " Plugged"
513 'gnus-agent-toggle-plugged))
514 (gnus-agent-go-online gnus-agent-go-online)
515 (gnus-agent-possibly-synchronize-flags))
517 (gnus-agent-close-connections)
518 (setq gnus-plugged set-to)
519 (gnus-run-hooks 'gnus-agent-unplugged-hook)
520 (setcar (cdr gnus-agent-mode-status)
521 (gnus-agent-make-mode-line-string " Unplugged"
523 'gnus-agent-toggle-plugged))))
524 (set-buffer-modified-p t))
526 (defmacro gnus-agent-while-plugged (&rest body)
527 `(let ((original-gnus-plugged gnus-plugged))
529 (progn (gnus-agent-toggle-plugged t)
531 (gnus-agent-toggle-plugged original-gnus-plugged))))
533 (put 'gnus-agent-while-plugged 'lisp-indent-function 0)
534 (put 'gnus-agent-while-plugged 'edebug-form-spec '(body))
536 (defun gnus-agent-close-connections ()
537 "Close all methods covered by the Gnus agent."
538 (let ((methods gnus-agent-covered-methods))
540 (gnus-close-server (pop methods)))))
543 (defun gnus-unplugged ()
544 "Start Gnus unplugged."
546 (setq gnus-plugged nil)
550 (defun gnus-plugged ()
551 "Start Gnus plugged."
553 (setq gnus-plugged t)
557 (defun gnus-slave-unplugged (&optional arg)
558 "Read news as a slave unplugged."
560 (setq gnus-plugged nil)
561 (gnus arg nil 'slave))
564 (defun gnus-agentize ()
565 "Allow Gnus to be an offline newsreader.
566 The normal usage of this command is to put the following as the
567 last form in your `.gnus.el' file:
571 This will modify the `gnus-setup-news-hook', and
572 `message-send-mail-real-function' variables, and install the Gnus agent
573 minor mode in all Gnus buffers."
576 (add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
577 (unless gnus-agent-send-mail-function
578 (setq gnus-agent-send-mail-function
579 (or message-send-mail-real-function
580 message-send-mail-function)
581 message-send-mail-real-function 'gnus-agent-send-mail))
583 (unless gnus-agent-covered-methods
586 (if (memq (car (gnus-server-to-method server))
587 gnus-agent-auto-agentize-methods)
588 (setq gnus-agent-covered-methods
589 (cons (gnus-server-to-method server)
590 gnus-agent-covered-methods ))))
591 (append (list gnus-select-method) gnus-secondary-select-methods))))
593 (defun gnus-agent-queue-setup ()
594 "Make sure the queue group exists."
595 (unless (gnus-gethash "nndraft:queue" gnus-newsrc-hashtb)
596 (gnus-request-create-group "queue" '(nndraft ""))
597 (let ((gnus-level-default-subscribed 1))
598 (gnus-subscribe-group "nndraft:queue" nil '(nndraft "")))
599 (gnus-group-set-parameter
600 "nndraft:queue" 'gnus-dummy '((gnus-draft-mode)))))
602 (defun gnus-agent-send-mail ()
604 (funcall gnus-agent-send-mail-function)
605 (goto-char (point-min))
607 (concat "^" (regexp-quote mail-header-separator) "\n"))
609 (gnus-agent-insert-meta-information 'mail)
610 (gnus-request-accept-article "nndraft:queue" nil t t)))
612 (defun gnus-agent-insert-meta-information (type &optional method)
613 "Insert meta-information into the message that says how it's to be posted.
614 TYPE can be either `mail' or `news'. If the latter, then METHOD can
617 (message-remove-header gnus-agent-meta-information-header)
618 (goto-char (point-min))
619 (insert gnus-agent-meta-information-header ": "
620 (symbol-name type) " " (format "%S" method)
623 (while (search-backward "\n" nil t)
624 (replace-match "\\n" t t))))
626 (defun gnus-agent-restore-gcc ()
627 "Restore GCC field from saved header."
629 (goto-char (point-min))
630 (while (re-search-forward (concat gnus-agent-gcc-header ":") nil t)
631 (replace-match "Gcc:" 'fixedcase))))
633 (defun gnus-agent-any-covered-gcc ()
635 (message-narrow-to-headers)
636 (let* ((gcc (mail-fetch-field "gcc" nil t))
638 (mapcar 'gnus-inews-group-method
639 (message-unquote-tokens
640 (message-tokenize-header
643 (while (and (not covered) methods)
644 (setq covered (gnus-agent-method-p (car methods))
645 methods (cdr methods)))
649 (defun gnus-agent-possibly-save-gcc ()
650 "Save GCC if Gnus is unplugged."
651 (when (and (not gnus-plugged) (gnus-agent-any-covered-gcc))
653 (goto-char (point-min))
654 (let ((case-fold-search t))
655 (while (re-search-forward "^gcc:" nil t)
656 (replace-match (concat gnus-agent-gcc-header ":") 'fixedcase))))))
658 (defun gnus-agent-possibly-do-gcc ()
659 "Do GCC if Gnus is plugged."
660 (when (or gnus-plugged (not (gnus-agent-any-covered-gcc)))
661 (gnus-inews-do-gcc)))
664 ;;; Group mode commands
667 (defun gnus-agent-fetch-groups (n)
668 "Put all new articles in the current groups into the Agent."
671 (error "Groups can't be fetched when Gnus is unplugged"))
672 (gnus-group-iterate n 'gnus-agent-fetch-group))
674 (defun gnus-agent-fetch-group (&optional group)
675 "Put all new articles in GROUP into the Agent."
676 (interactive (list (gnus-group-group-name)))
677 (setq group (or group gnus-newsgroup-name))
679 (error "No group on the current line"))
681 (gnus-agent-while-plugged
682 (let ((gnus-command-method (gnus-find-method-for-group group)))
683 (gnus-agent-with-fetch
684 (gnus-agent-fetch-group-1 group gnus-command-method)
685 (gnus-message 5 "Fetching %s...done" group)))))
687 (defun gnus-agent-add-group (category arg)
688 "Add the current group to an agent category."
694 (mapcar (lambda (cat) (list (symbol-name (car cat))))
698 (let ((cat (assq category gnus-category-alist))
700 (gnus-group-iterate arg
702 (when (gnus-agent-cat-groups (setq c (gnus-group-category group)))
703 (setf (gnus-agent-cat-groups c)
704 (delete group (gnus-agent-cat-groups c))))
705 (push group groups)))
706 (setf (gnus-agent-cat-groups cat)
707 (nconc (gnus-agent-cat-groups cat) groups))
708 (gnus-category-write)))
710 (defun gnus-agent-remove-group (arg)
711 "Remove the current group from its agent category, if any."
714 (gnus-group-iterate arg
716 (when (gnus-agent-cat-groups (setq c (gnus-group-category group)))
717 (setf (gnus-agent-cat-groups c)
718 (delete group (gnus-agent-cat-groups c))))))
719 (gnus-category-write)))
721 (defun gnus-agent-synchronize-flags ()
722 "Synchronize unplugged flags with servers."
725 (dolist (gnus-command-method gnus-agent-covered-methods)
726 (when (file-exists-p (gnus-agent-lib-file "flags"))
727 (gnus-agent-synchronize-flags-server gnus-command-method)))))
729 (defun gnus-agent-possibly-synchronize-flags ()
730 "Synchronize flags according to `gnus-agent-synchronize-flags'."
733 (dolist (gnus-command-method gnus-agent-covered-methods)
734 (when (file-exists-p (gnus-agent-lib-file "flags"))
735 (gnus-agent-possibly-synchronize-flags-server gnus-command-method)))))
737 (defun gnus-agent-synchronize-flags-server (method)
738 "Synchronize flags set when unplugged for server."
739 (let ((gnus-command-method method))
740 (when (file-exists-p (gnus-agent-lib-file "flags"))
741 (set-buffer (get-buffer-create " *Gnus Agent flag synchronize*"))
743 (nnheader-insert-file-contents (gnus-agent-lib-file "flags"))
744 (if (null (gnus-check-server gnus-command-method))
745 (gnus-message 1 "Couldn't open server %s" (nth 1 gnus-command-method))
747 (if (null (eval (read (current-buffer))))
748 (progn (forward-line)
750 (write-file (gnus-agent-lib-file "flags"))
751 (error "Couldn't set flags from file %s"
752 (gnus-agent-lib-file "flags"))))
753 (delete-file (gnus-agent-lib-file "flags")))
756 (defun gnus-agent-possibly-synchronize-flags-server (method)
757 "Synchronize flags for server according to `gnus-agent-synchronize-flags'."
758 (when (or (and gnus-agent-synchronize-flags
759 (not (eq gnus-agent-synchronize-flags 'ask)))
760 (and (eq gnus-agent-synchronize-flags 'ask)
761 (gnus-y-or-n-p (format "Synchronize flags on server `%s'? "
763 (gnus-agent-synchronize-flags-server method)))
766 ;;; Server mode commands
769 (defun gnus-agent-add-server (server)
770 "Enroll SERVER in the agent program."
771 (interactive (list (gnus-server-server-name)))
773 (error "No server on the current line"))
774 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
775 (when (gnus-agent-method-p method)
776 (error "Server already in the agent program"))
777 (push method gnus-agent-covered-methods)
778 (gnus-server-update-server server)
779 (gnus-agent-write-servers)
780 (gnus-message 1 "Entered %s into the Agent" server)))
782 (defun gnus-agent-remove-server (server)
783 "Remove SERVER from the agent program."
784 (interactive (list (gnus-server-server-name)))
786 (error "No server on the current line"))
787 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
788 (unless (gnus-agent-method-p method)
789 (error "Server not in the agent program"))
790 (setq gnus-agent-covered-methods
791 (delete method gnus-agent-covered-methods))
792 (gnus-server-update-server server)
793 (gnus-agent-write-servers)
794 (gnus-message 1 "Removed %s from the agent" server)))
796 (defun gnus-agent-read-servers ()
797 "Read the alist of covered servers."
799 (let ((method (gnus-server-get-method
803 (unless (member method gnus-agent-covered-methods)
804 (push method gnus-agent-covered-methods))
805 (gnus-message 1 "Ignoring disappeared server `%s'" m)
807 (gnus-agent-read-file
808 (nnheader-concat gnus-agent-directory "lib/servers"))))
810 (defun gnus-agent-write-servers ()
811 "Write the alist of covered servers."
812 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
813 (let ((coding-system-for-write nnheader-file-coding-system)
814 (file-name-coding-system nnmail-pathname-coding-system))
815 (with-temp-file (nnheader-concat gnus-agent-directory "lib/servers")
816 (prin1 (mapcar 'gnus-method-simplify gnus-agent-covered-methods)
823 (defun gnus-agent-mark-article (n &optional unmark)
824 "Mark the next N articles as downloadable.
825 If N is negative, mark backward instead. If UNMARK is non-nil, remove
826 the mark instead. The difference between N and the actual number of
827 articles marked is returned."
829 (let ((backward (< n 0))
834 (gnus-summary-set-agent-mark
835 (gnus-summary-article-number) unmark)
836 (zerop (gnus-summary-next-subject (if backward -1 1) nil t))))
839 (gnus-message 7 "No more articles"))
840 (gnus-summary-recenter)
841 (gnus-summary-position-point)
844 (defun gnus-agent-unmark-article (n)
845 "Remove the downloadable mark from the next N articles.
846 If N is negative, unmark backward instead. The difference between N and
847 the actual number of articles unmarked is returned."
849 (gnus-agent-mark-article n t))
851 (defun gnus-agent-toggle-mark (n)
852 "Toggle the downloadable mark from the next N articles.
853 If N is negative, toggle backward instead. The difference between N and
854 the actual number of articles toggled is returned."
856 (gnus-agent-mark-article n 'toggle))
858 (defun gnus-summary-set-agent-mark (article &optional unmark)
859 "Mark ARTICLE as downloadable. If UNMARK is nil, article is marked.
860 When UNMARK is t, the article is unmarked. For any other value, the
861 article's mark is toggled."
862 (let ((unmark (cond ((eq nil unmark)
867 (memq article gnus-newsgroup-downloadable)))))
868 (when (gnus-summary-goto-subject article nil t)
869 (gnus-summary-update-mark
872 (setq gnus-newsgroup-downloadable
873 (delq article gnus-newsgroup-downloadable))
874 (gnus-article-mark article))
876 (setq gnus-newsgroup-downloadable
877 (gnus-add-to-sorted-list gnus-newsgroup-downloadable article))
878 gnus-downloadable-mark)
882 (defun gnus-agent-get-undownloaded-list ()
883 "Construct list of articles that have not been downloaded."
884 (let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
885 (when (set (make-local-variable 'gnus-newsgroup-agentized)
886 (gnus-agent-method-p gnus-command-method))
887 (let* ((alist (gnus-agent-load-alist gnus-newsgroup-name))
888 (headers (sort (mapcar (lambda (h)
889 (mail-header-number h))
890 gnus-newsgroup-headers) '<))
891 (undownloaded (list nil))
892 (tail-undownloaded undownloaded)
893 (unfetched (list nil))
894 (tail-unfetched unfetched))
895 (while (and alist headers)
896 (let ((a (caar alist))
899 ;; Ignore IDs in the alist that are not being
900 ;; displayed in the summary.
903 ;; Headers that are not in the alist should be
904 ;; fictious (see nnagent-retrieve-headers); they
905 ;; imply that this article isn't in the agent.
906 (gnus-agent-append-to-list tail-undownloaded h)
907 (gnus-agent-append-to-list tail-unfetched h)
912 nil ; ignore already downloaded
917 (gnus-agent-append-to-list tail-undownloaded a)))))
920 (let ((num (pop headers)))
921 (gnus-agent-append-to-list tail-undownloaded num)
922 (gnus-agent-append-to-list tail-unfetched num)))
924 (setq gnus-newsgroup-undownloaded (cdr undownloaded)
925 gnus-newsgroup-unfetched (cdr unfetched))))))
927 (defun gnus-agent-catchup ()
928 "Mark as read all unhandled articles.
929 An article is unhandled if it is neither cached, nor downloaded, nor
933 (let ((articles gnus-newsgroup-undownloaded))
934 (when (or gnus-newsgroup-downloadable
935 gnus-newsgroup-cached)
936 (setq articles (gnus-sorted-ndifference
937 (gnus-sorted-ndifference
938 (gnus-copy-sequence articles)
939 gnus-newsgroup-downloadable)
940 gnus-newsgroup-cached)))
943 (gnus-summary-mark-article
944 (pop articles) gnus-catchup-mark)))
945 (gnus-summary-position-point)))
947 (defun gnus-agent-summary-fetch-series ()
949 (when gnus-newsgroup-processable
950 (setq gnus-newsgroup-downloadable
951 (let* ((dl gnus-newsgroup-downloadable)
952 (gnus-newsgroup-downloadable
953 (sort (gnus-copy-sequence gnus-newsgroup-processable) '<))
954 (fetched-articles (gnus-agent-summary-fetch-group)))
955 ;; The preceeding call to (gnus-agent-summary-fetch-group)
956 ;; updated gnus-newsgroup-downloadable to remove each
957 ;; article successfully fetched.
959 ;; For each article that I processed, remove its
960 ;; processable mark IF the article is no longer
961 ;; downloadable (i.e. it's already downloaded)
962 (dolist (article gnus-newsgroup-processable)
963 (unless (memq article gnus-newsgroup-downloadable)
964 (gnus-summary-remove-process-mark article)))
965 (gnus-sorted-ndifference dl fetched-articles)))))
967 (defun gnus-agent-summary-fetch-group (&optional all)
968 "Fetch the downloadable articles in the group.
969 Optional arg ALL, if non-nil, means to fetch all articles."
972 (if all gnus-newsgroup-articles
973 gnus-newsgroup-downloadable))
974 (gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name))
976 (gnus-agent-while-plugged
978 (error "No articles to download"))
979 (gnus-agent-with-fetch
980 (setq gnus-newsgroup-undownloaded
981 (gnus-sorted-ndifference
982 gnus-newsgroup-undownloaded
983 (setq fetched-articles
984 (gnus-agent-fetch-articles
985 gnus-newsgroup-name articles)))))
987 (dolist (article articles)
988 (let ((was-marked-downloadable
989 (memq article gnus-newsgroup-downloadable)))
990 (cond (gnus-agent-mark-unread-after-downloaded
991 (setq gnus-newsgroup-downloadable
992 (delq article gnus-newsgroup-downloadable))
994 ;; The downloadable mark is implemented as a
995 ;; type of read mark. Therefore, marking the
996 ;; article as unread is sufficient to clear
997 ;; its downloadable flag.
998 (gnus-summary-mark-article article gnus-unread-mark))
999 (was-marked-downloadable
1000 (gnus-summary-set-agent-mark article t)))
1001 (when (gnus-summary-goto-subject article nil t)
1002 (gnus-summary-update-download-mark article))))))
1005 (defun gnus-agent-fetch-selected-article ()
1006 "Fetch the current article as it is selected.
1007 This can be added to `gnus-select-article-hook' or
1008 `gnus-mark-article-hook'."
1009 (let ((gnus-command-method gnus-current-select-method))
1010 (when (and gnus-plugged (gnus-agent-method-p gnus-command-method))
1011 (when (gnus-agent-fetch-articles
1013 (list gnus-current-article))
1014 (setq gnus-newsgroup-undownloaded
1015 (delq gnus-current-article gnus-newsgroup-undownloaded))
1016 (gnus-summary-update-article-line
1017 gnus-current-article
1018 (gnus-summary-article-header gnus-current-article))))))
1021 ;;; Internal functions
1024 (defun gnus-agent-save-active (method)
1025 (gnus-agent-save-active-1 method 'gnus-active-to-gnus-format))
1027 (defun gnus-agent-save-active-1 (method function)
1028 (when (gnus-agent-method-p method)
1029 (let* ((gnus-command-method method)
1030 (new (gnus-make-hashtable (count-lines (point-min) (point-max))))
1031 (file (gnus-agent-lib-file "active")))
1032 (funcall function nil new)
1033 (gnus-agent-write-active file new)
1035 (nnheader-insert-file-contents file))))
1037 (defun gnus-agent-write-active (file new)
1038 (let ((orig (gnus-make-hashtable (count-lines (point-min) (point-max))))
1039 (file (gnus-agent-lib-file "active"))
1041 (when (file-exists-p file)
1043 (nnheader-insert-file-contents file)
1044 (gnus-active-to-gnus-format nil orig))
1047 (when (and sym (boundp sym))
1048 (if (and (boundp (setq osym (intern (symbol-name sym) orig)))
1049 (setq elem (symbol-value osym)))
1051 (if (and (integerp (car (symbol-value sym)))
1052 (> (car elem) (car (symbol-value sym))))
1053 (setcar elem (car (symbol-value sym))))
1054 (if (integerp (cdr (symbol-value sym)))
1055 (setcdr elem (cdr (symbol-value sym)))))
1056 (set (intern (symbol-name sym) orig) (symbol-value sym)))))
1058 (gnus-make-directory (file-name-directory file))
1059 (let ((nnmail-active-file-coding-system gnus-agent-file-coding-system))
1060 ;; The hashtable contains real names of groups, no more prefix
1061 ;; removing, so set `full' to `t'.
1062 (gnus-write-active-file file orig t))))
1064 (defun gnus-agent-save-groups (method)
1065 (gnus-agent-save-active-1 method 'gnus-groups-to-gnus-format))
1067 (defun gnus-agent-save-group-info (method group active)
1068 (when (gnus-agent-method-p method)
1069 (let* ((gnus-command-method method)
1070 (coding-system-for-write nnheader-file-coding-system)
1071 (file-name-coding-system nnmail-pathname-coding-system)
1072 (file (gnus-agent-lib-file "active"))
1074 (gnus-make-directory (file-name-directory file))
1075 (with-temp-file file
1076 ;; Emacs got problem to match non-ASCII group in multibyte buffer.
1077 (mm-disable-multibyte)
1078 (when (file-exists-p file)
1079 (nnheader-insert-file-contents file))
1080 (goto-char (point-min))
1081 (when (re-search-forward
1082 (concat "^" (regexp-quote group) " ") nil t)
1084 (read (current-buffer)) ;; max
1085 (setq oactive-min (read (current-buffer)))) ;; min
1087 (insert (format "%S %d %d y\n" (intern group)
1089 (or oactive-min (car active))))
1090 (goto-char (point-max))
1091 (while (search-backward "\\." nil t)
1092 (delete-char 1))))))
1094 (defun gnus-agent-group-path (group)
1095 "Translate GROUP into a file name."
1096 (if nnmail-use-long-file-names
1097 (gnus-group-real-name group)
1098 (nnheader-translate-file-chars
1099 (nnheader-replace-chars-in-string
1100 (nnheader-replace-duplicate-chars-in-string
1101 (nnheader-replace-chars-in-string
1102 (gnus-group-real-name group)
1107 (defun gnus-agent-get-function (method)
1108 (if (gnus-online method)
1113 ;;; History functions
1115 (defun gnus-agent-history-buffer ()
1116 (cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))
1118 (defun gnus-agent-open-history ()
1120 (push (cons (gnus-agent-method)
1121 (set-buffer (gnus-get-buffer-create
1122 (format " *Gnus agent %s history*"
1123 (gnus-agent-method)))))
1124 gnus-agent-history-buffers)
1125 (mm-disable-multibyte) ;; everything is binary
1128 (let ((file (gnus-agent-lib-file "history")))
1129 (when (file-exists-p file)
1130 (nnheader-insert-file-contents file))
1131 (set (make-local-variable 'gnus-agent-file-name) file))))
1133 (defun gnus-agent-close-history ()
1134 (when (gnus-buffer-live-p gnus-agent-current-history)
1135 (kill-buffer gnus-agent-current-history)
1136 (setq gnus-agent-history-buffers
1137 (delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
1138 gnus-agent-history-buffers))))
1144 (defun gnus-agent-fetch-articles (group articles)
1145 "Fetch ARTICLES from GROUP and put them into the Agent."
1147 (gnus-agent-load-alist group)
1148 (let* ((alist gnus-agent-article-alist)
1149 (headers (if (< (length articles) 2) nil gnus-newsgroup-headers))
1150 (selected-sets (list nil))
1151 (current-set-size 0)
1154 ;; Check each article
1155 (while (setq article (pop articles))
1156 ;; Skip alist entries preceeding this article
1157 (while (> article (or (caar alist) (1+ article)))
1158 (setq alist (cdr alist)))
1160 ;; Prune off articles that we have already fetched.
1161 (unless (and (eq article (caar alist))
1163 ;; Skip headers preceeding this article
1166 (let* ((header (car headers)))
1168 (mail-header-number header)
1170 (setq headers (cdr headers)))
1172 ;; Add this article to the current set
1173 (setcar selected-sets (cons article (car selected-sets)))
1175 ;; Update the set size, when the set is too large start a
1176 ;; new one. I do this after adding the article as I want at
1177 ;; least one article in each set.
1178 (when (< gnus-agent-max-fetch-size
1179 (setq current-set-size
1181 (if (= header-number article)
1182 (let ((char-size (mail-header-chars
1184 (if (<= char-size 0)
1185 ;; The char size was missing/invalid,
1186 ;; assume a worst-case situation of
1187 ;; 65 char/line. If the line count
1188 ;; is missing, arbitrarily assume a
1189 ;; size of 1000 characters.
1190 (max (* 65 (mail-header-lines
1195 (setcar selected-sets (nreverse (car selected-sets)))
1196 (setq selected-sets (cons nil selected-sets)
1197 current-set-size 0))))
1199 (when (or (cdr selected-sets) (car selected-sets))
1200 (let* ((fetched-articles (list nil))
1201 (tail-fetched-articles fetched-articles)
1203 (gnus-agent-directory)
1204 (gnus-agent-group-path group) "/"))
1205 (date (time-to-days (current-time)))
1206 (case-fold-search t)
1209 (setcar selected-sets (nreverse (car selected-sets)))
1210 (setq selected-sets (nreverse selected-sets))
1212 (gnus-make-directory dir)
1213 (gnus-message 7 "Fetching articles for %s..." group)
1216 (while (setq articles (pop selected-sets))
1217 ;; Fetch the articles from the backend.
1218 (if (gnus-check-backend-function 'retrieve-articles group)
1219 (setq pos (gnus-retrieve-articles articles group))
1222 (while (setq article (pop articles))
1223 (gnus-message 10 "Fetching article %s for %s..."
1226 (gnus-backlog-request-article group article
1228 (gnus-request-article article group))
1229 (goto-char (point-max))
1230 (push (cons article (point)) pos)
1231 (insert-buffer-substring nntp-server-buffer)))
1233 nntp-server-buffer (point-min) (point-max))
1234 (setq pos (nreverse pos)))))
1235 ;; Then save these articles into the Agent.
1237 (set-buffer nntp-server-buffer)
1239 (narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
1240 (goto-char (point-min))
1241 (unless (eobp) ;; Don't save empty articles.
1242 (when (search-forward "\n\n" nil t)
1243 (when (search-backward "\nXrefs: " nil t)
1244 ;; Handle cross posting.
1245 (goto-char (match-end 0)) ; move to end of header name
1246 (skip-chars-forward "^ ") ; skip server name
1247 (skip-chars-forward " ")
1249 (while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) *")
1250 (push (cons (buffer-substring (match-beginning 1)
1253 (buffer-substring (match-beginning 2)
1256 (goto-char (match-end 0)))
1257 (gnus-agent-crosspost crosses (caar pos) date)))
1258 (goto-char (point-min))
1259 (if (not (re-search-forward
1260 "^Message-ID: *<\\([^>\n]+\\)>" nil t))
1261 (setq id "No-Message-ID-in-article")
1262 (setq id (buffer-substring
1263 (match-beginning 1) (match-end 1))))
1264 (let ((coding-system-for-write
1265 gnus-agent-file-coding-system))
1266 (write-region (point-min) (point-max)
1267 (concat dir (number-to-string (caar pos)))
1270 (gnus-agent-append-to-list
1271 tail-fetched-articles (caar pos)))
1275 (gnus-agent-save-alist group (cdr fetched-articles) date)
1276 (gnus-message 7 ""))
1277 (cdr fetched-articles))))))
1279 (defun gnus-agent-crosspost (crosses article &optional date)
1280 (setq date (or date t))
1282 (let (gnus-agent-article-alist group alist beg end)
1284 (set-buffer gnus-agent-overview-buffer)
1285 (when (nnheader-find-nov-line article)
1288 (setq end (progn (forward-line 1) (point)))))
1290 (setq group (caar crosses))
1291 (unless (setq alist (assoc group gnus-agent-group-alist))
1292 (push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
1293 gnus-agent-group-alist))
1294 (setcdr alist (cons (cons (cdar crosses) date) (cdr alist)))
1296 (set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
1298 (when (= (point-max) (point-min))
1299 (push (cons group (current-buffer)) gnus-agent-buffer-alist)
1301 (nnheader-insert-file-contents
1302 (gnus-agent-article-name ".overview" group))))
1303 (nnheader-find-nov-line (string-to-number (cdar crosses)))
1304 (insert (string-to-number (cdar crosses)))
1305 (insert-buffer-substring gnus-agent-overview-buffer beg end)
1306 (gnus-agent-check-overview-buffer))
1309 (defun gnus-agent-backup-overview-buffer ()
1310 (when gnus-newsgroup-name
1311 (let ((root (gnus-agent-article-name ".overview" gnus-newsgroup-name))
1314 (while (file-exists-p
1315 (setq name (concat root "~"
1316 (int-to-string (setq cnt (1+ cnt))) "~"))))
1317 (write-region (point-min) (point-max) name nil 'no-msg)
1318 (gnus-message 1 "Created backup copy of overview in %s." name)))
1321 (defun gnus-agent-check-overview-buffer (&optional buffer)
1322 "Check the overview file given for sanity.
1323 In particular, checks that the file is sorted by article number
1324 and that there are no duplicates."
1329 (set-buffer buffer))
1332 (goto-char (point-min))
1334 (while (< (point) (point-max))
1336 (cur (condition-case nil
1337 (read (current-buffer))
1340 ((or (not (integerp cur))
1341 (not (eq (char-after) ?\t)))
1343 (setq backed-up (gnus-agent-backup-overview-buffer)))
1345 "Overview buffer contains garbage '%s'."
1347 p (gnus-point-at-eol))))
1350 (setq backed-up (gnus-agent-backup-overview-buffer)))
1352 "Duplicate overview line for %d" cur)
1353 (delete-region (point) (progn (forward-line 1) (point))))
1356 (setq backed-up (gnus-agent-backup-overview-buffer)))
1357 (gnus-message 1 "Overview buffer not sorted!")
1358 (sort-numeric-fields 1 (point-min) (point-max))
1359 (goto-char (point-min))
1362 (setq prev-num cur)))
1363 (forward-line 1)))))))
1365 (defun gnus-agent-flush-cache ()
1367 (while gnus-agent-buffer-alist
1368 (set-buffer (cdar gnus-agent-buffer-alist))
1369 (let ((coding-system-for-write
1370 gnus-agent-file-coding-system))
1371 (write-region (point-min) (point-max)
1372 (gnus-agent-article-name ".overview"
1373 (caar gnus-agent-buffer-alist))
1375 (pop gnus-agent-buffer-alist))
1376 (while gnus-agent-group-alist
1377 (with-temp-file (gnus-agent-article-name
1378 ".agentview" (caar gnus-agent-group-alist))
1379 (princ (cdar gnus-agent-group-alist))
1381 (princ 1 (current-buffer))
1383 (pop gnus-agent-group-alist))))
1385 (defun gnus-agent-find-parameter (group symbol)
1386 "Search for GROUPs SYMBOL in the group's parameters, the group's
1387 topic parameters, the group's category, or the customizable
1388 variables. Returns the first non-nil value found."
1389 (or (gnus-group-find-parameter group symbol t)
1390 (gnus-group-parameter-value (cdr (gnus-group-category group)) symbol t)
1394 '((agent-short-article . gnus-agent-short-article)
1395 (agent-long-article . gnus-agent-long-article)
1396 (agent-low-score . gnus-agent-low-score)
1397 (agent-high-score . gnus-agent-high-score)
1398 (agent-days-until-old . gnus-agent-expire-days)
1399 (agent-enable-expiration
1400 . gnus-agent-enable-expiration)))))))
1402 (defun gnus-agent-fetch-headers (group &optional force)
1403 "Fetch interesting headers into the agent. The group's overview
1404 file will be updated to include the headers while a list of available
1405 article numbers will be returned."
1406 (let* ((fetch-all (and gnus-agent-consider-all-articles
1407 ;; Do not fetch all headers if the predicate
1408 ;; implies that we only consider unread articles.
1409 (not (gnus-predicate-implies-unread
1410 (gnus-agent-find-parameter group
1411 'agent-predicate)))))
1412 (articles (if fetch-all
1413 (gnus-uncompress-range (gnus-active group))
1414 (gnus-list-of-unread-articles group)))
1415 (gnus-decode-encoded-word-function 'identity)
1416 (file (gnus-agent-article-name ".overview" group)))
1419 ;; Add articles with marks to the list of article headers we want to
1420 ;; fetch. Don't fetch articles solely on the basis of a recent or seen
1421 ;; mark, but do fetch recent or seen articles if they have other, more
1422 ;; interesting marks. (We have to fetch articles with boring marks
1423 ;; because otherwise the agent will remove their marks.)
1424 (dolist (arts (gnus-info-marks (gnus-get-info group)))
1425 (unless (memq (car arts) '(seen recent killed cache))
1426 (setq articles (gnus-range-add articles (cdr arts)))))
1427 (setq articles (sort (gnus-uncompress-sequence articles) '<)))
1429 ;; At this point, I have the list of articles to consider for
1430 ;; fetching. This is the list that I'll return to my caller. Some
1431 ;; of these articles may have already been fetched. That's OK as
1432 ;; the fetch article code will filter those out. Internally, I'll
1433 ;; filter this list to just those articles whose headers need to
1435 (let ((articles articles))
1436 ;; Remove known articles.
1437 (when (and (or gnus-agent-cache
1439 (gnus-agent-load-alist group))
1440 ;; Remove articles marked as downloaded.
1442 ;; I want to fetch all headers in the active range.
1443 ;; Therefore, exclude only those headers that are in the
1445 ;; NOTE: This is probably NOT what I want to do after
1446 ;; agent expiration in this group.
1447 (setq articles (gnus-agent-uncached-articles articles group))
1449 ;; I want to only fetch those headers that have never been
1450 ;; fetched. Therefore, exclude all headers that are, or
1451 ;; WERE, in the article alist.
1452 (let ((low (1+ (caar (last gnus-agent-article-alist))))
1453 (high (cdr (gnus-active group))))
1454 ;; Low can be greater than High when the same group is
1455 ;; fetched twice in the same session {The first fetch will
1456 ;; fill the article alist such that (last
1457 ;; gnus-agent-article-alist) equals (cdr (gnus-active
1458 ;; group))}. The addition of one(the 1+ above) then
1459 ;; forces Low to be greater than High. When this happens,
1460 ;; gnus-list-range-intersection returns nil which
1461 ;; indicates that no headers need to be fetched. -- Kevin
1462 (setq articles (gnus-list-range-intersection
1463 articles (list (cons low high)))))))
1466 10 "gnus-agent-fetch-headers: undownloaded articles are '%s'"
1467 (gnus-compress-sequence articles t))
1470 (set-buffer nntp-server-buffer)
1474 (gnus-message 7 "Fetching headers for %s..." group)
1477 (gnus-make-directory (nnheader-translate-file-chars
1478 (file-name-directory file) t))
1480 (unless (eq 'nov (gnus-retrieve-headers articles group))
1481 (nnvirtual-convert-headers))
1482 (gnus-agent-check-overview-buffer)
1483 ;; Move these headers to the overview buffer so that
1484 ;; gnus-agent-braid-nov can merge them with the contents
1487 gnus-agent-overview-buffer (point-min) (point-max))
1488 (when (file-exists-p file)
1489 (gnus-agent-braid-nov group articles file))
1490 (let ((coding-system-for-write
1491 gnus-agent-file-coding-system))
1492 (gnus-agent-check-overview-buffer)
1493 (write-region (point-min) (point-max) file nil 'silent))
1494 (gnus-agent-save-alist group articles nil)
1498 (nnheader-insert-file-contents file)))))
1501 (defsubst gnus-agent-copy-nov-line (article)
1503 (set-buffer gnus-agent-overview-buffer)
1504 (while (and (not (eobp))
1505 (< (setq art (read (current-buffer))) article))
1509 (not (eq article art)))
1510 (set-buffer nntp-server-buffer)
1512 (setq e (progn (forward-line 1) (point)))
1513 (set-buffer nntp-server-buffer)
1514 (insert-buffer-substring gnus-agent-overview-buffer b e))))
1516 (defun gnus-agent-braid-nov (group articles file)
1517 "Merge agent overview data with given file.
1518 Takes headers for ARTICLES from `gnus-agent-overview-buffer' and the given
1519 FILE and places the combined headers into `nntp-server-buffer'."
1521 (set-buffer gnus-agent-overview-buffer)
1522 (goto-char (point-min))
1523 (set-buffer nntp-server-buffer)
1525 (nnheader-insert-file-contents file)
1526 (goto-char (point-max))
1528 (unless (looking-at "[0-9]+\t")
1529 ;; Remove corrupted lines
1531 1 "Overview %s is corrupted. Removing corrupted lines..." file)
1532 (goto-char (point-min))
1534 (if (looking-at "[0-9]+\t")
1536 (delete-region (point) (progn (forward-line 1) (point)))))
1538 (unless (or (= (point-min) (point-max))
1539 (< (setq last (read (current-buffer))) (car articles)))
1540 ;; We do it the hard way.
1541 (when (nnheader-find-nov-line (car articles))
1542 ;; Replacing existing NOV entry
1543 (delete-region (point) (progn (forward-line 1) (point))))
1544 (gnus-agent-copy-nov-line (pop articles))
1548 (while (let ((art (read (current-buffer))))
1549 (cond ((< art (car articles))
1552 ((= art (car articles))
1555 (point) (progn (forward-line 1) (point)))
1561 (gnus-agent-copy-nov-line (pop articles)))))
1563 ;; Copy the rest lines
1564 (set-buffer nntp-server-buffer)
1565 (goto-char (point-max))
1568 (set-buffer gnus-agent-overview-buffer)
1570 (while (<= (read (current-buffer)) last)
1573 (setq start (point))
1574 (set-buffer nntp-server-buffer))
1575 (insert-buffer-substring gnus-agent-overview-buffer start))))
1577 ;; Keeps the compiler from warning about the free variable in
1578 ;; gnus-agent-read-agentview.
1580 (defvar gnus-agent-read-agentview))
1582 (defun gnus-agent-load-alist (group)
1583 "Load the article-state alist for GROUP."
1584 ;; Bind free variable that's used in `gnus-agent-read-agentview'.
1585 (let ((gnus-agent-read-agentview group))
1586 (setq gnus-agent-article-alist
1587 (gnus-cache-file-contents
1588 (gnus-agent-article-name ".agentview" group)
1589 'gnus-agent-file-loading-cache
1590 'gnus-agent-read-agentview))))
1592 ;; Save format may be either 1 or 2. Two is the new, compressed
1593 ;; format that is still being tested. Format 1 is uncompressed but
1594 ;; known to be reliable.
1595 (defconst gnus-agent-article-alist-save-format 2)
1597 (defun gnus-agent-read-agentview (file)
1598 "Load FILE and do a `read' there."
1601 (nnheader-insert-file-contents file)
1602 (goto-char (point-min))
1603 (let ((alist (read (current-buffer)))
1604 (version (condition-case nil (read (current-buffer))
1610 (let ((inhibit-quit t)
1612 (gnus-agent-open-history)
1613 (set-buffer (gnus-agent-history-buffer))
1614 (goto-char (point-min))
1616 (if (and (looking-at
1617 "[^\t\n]+\t\\([0-9]+\\)\t\\([^ \n]+\\) \\([0-9]+\\)")
1618 (string= (match-string 2)
1619 gnus-agent-read-agentview)
1620 (setq entry (assoc (string-to-number (match-string 3)) alist)))
1621 (setcdr entry (string-to-number (match-string 1))))
1623 (gnus-agent-close-history)
1624 (setq changed-version t)))
1626 (setq changed-version (not (= 1 gnus-agent-article-alist-save-format))))
1631 (let ((state (car comp-list))
1632 (sequence (gnus-uncompress-sequence
1634 (mapcar (lambda (article-id)
1635 (setq uncomp (cons (cons article-id state) uncomp)))
1638 (setq alist (sort uncomp
1639 (lambda (first second)
1640 (< (car first) (car second))))))))
1641 (when changed-version
1642 (let ((gnus-agent-article-alist alist))
1643 (gnus-agent-save-alist gnus-agent-read-agentview)))
1646 (defun gnus-agent-save-alist (group &optional articles state dir)
1647 "Save the article-state alist for GROUP."
1648 (let* ((file-name-coding-system nnmail-pathname-coding-system)
1649 (prev (cons nil gnus-agent-article-alist))
1651 print-level print-length item article)
1652 (while (setq article (pop articles))
1653 (while (and (cdr prev)
1654 (< (caadr prev) article))
1655 (setq prev (cdr prev)))
1658 (setcdr prev (list (cons article state))))
1659 ((> (caadr prev) article)
1660 (setcdr prev (cons (cons article state) (cdr prev))))
1661 ((= (caadr prev) article)
1662 (setcdr (cadr prev) state)))
1663 (setq prev (cdr prev)))
1664 (setq gnus-agent-article-alist (cdr all))
1666 (gnus-make-directory dir)
1667 (gnus-make-directory (gnus-agent-article-name "" group)))
1668 (with-temp-file (if dir
1669 (expand-file-name ".agentview" dir)
1670 (gnus-agent-article-name ".agentview" group))
1671 (cond ((eq gnus-agent-article-alist-save-format 1)
1672 (princ gnus-agent-article-alist (current-buffer)))
1673 ((eq gnus-agent-article-alist-save-format 2)
1674 (let ((compressed nil))
1675 (mapcar (lambda (pair)
1676 (let* ((article-id (car pair))
1677 (day-of-download (cdr pair))
1678 (comp-list (assq day-of-download compressed)))
1681 (cons article-id (cdr comp-list)))
1683 (cons (list day-of-download article-id)
1685 nil)) gnus-agent-article-alist)
1686 (mapcar (lambda (comp-list)
1688 (gnus-compress-sequence
1689 (nreverse (cdr comp-list)))))
1691 (princ compressed (current-buffer)))))
1693 (princ gnus-agent-article-alist-save-format (current-buffer))
1696 (defun gnus-agent-article-name (article group)
1697 (expand-file-name article
1698 (file-name-as-directory
1699 (expand-file-name (gnus-agent-group-path group)
1700 (gnus-agent-directory)))))
1702 (defun gnus-agent-batch-confirmation (msg)
1703 "Show error message and return t."
1704 (gnus-message 1 msg)
1708 (defun gnus-agent-batch-fetch ()
1709 "Start Gnus and fetch session."
1712 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
1713 (gnus-agent-fetch-session))
1716 (defun gnus-agent-fetch-session ()
1717 "Fetch all articles and headers that are eligible for fetching."
1719 (unless gnus-agent-covered-methods
1720 (error "No servers are covered by the Gnus agent"))
1721 (unless gnus-plugged
1722 (error "Can't fetch articles while Gnus is unplugged"))
1723 (let ((methods gnus-agent-covered-methods)
1724 groups group gnus-command-method)
1727 (setq gnus-command-method (car methods))
1728 (when (and (or (gnus-server-opened gnus-command-method)
1729 (gnus-open-server gnus-command-method))
1730 (gnus-online gnus-command-method))
1731 (setq groups (gnus-groups-from-server (car methods)))
1732 (gnus-agent-with-fetch
1733 (while (setq group (pop groups))
1734 (when (<= (gnus-group-level group)
1735 gnus-agent-handle-level)
1736 (if (or debug-on-error debug-on-quit)
1737 (gnus-agent-fetch-group-1
1738 group gnus-command-method)
1740 (gnus-agent-fetch-group-1
1741 group gnus-command-method)
1743 (unless (funcall gnus-agent-confirmation-function
1744 (format "Error %s. Continue? "
1745 (error-message-string err)))
1746 (error "Cannot fetch articles into the Gnus agent")))
1748 (unless (funcall gnus-agent-confirmation-function
1750 "Quit fetching session %s. Continue? "
1751 (error-message-string err)))
1753 "Cannot fetch articles into the Gnus agent")))))))))
1755 (run-hooks 'gnus-agent-fetch-hook)
1756 (gnus-message 6 "Finished fetching articles into the Gnus agent"))))
1758 (defun gnus-agent-fetch-group-1 (group method)
1760 (let ((gnus-command-method method)
1761 (gnus-newsgroup-name group)
1762 (gnus-newsgroup-dependencies gnus-newsgroup-dependencies)
1763 (gnus-newsgroup-headers gnus-newsgroup-headers)
1764 (gnus-newsgroup-scored gnus-newsgroup-scored)
1765 (gnus-use-cache gnus-use-cache)
1766 (gnus-summary-expunge-below gnus-summary-expunge-below)
1767 (gnus-summary-mark-below gnus-summary-mark-below)
1768 (gnus-orphan-score gnus-orphan-score)
1769 ;; Maybe some other gnus-summary local variables should also
1775 category predicate info marks score-param
1777 (unless (gnus-check-group group)
1778 (error "Can't open server for %s" group))
1781 (when (or gnus-newsgroup-active
1783 (gnus-activate-group group))
1784 (let ((marked-articles gnus-newsgroup-downloadable))
1785 ;; Identify the articles marked for download
1786 (unless gnus-newsgroup-active
1787 ;; The variable gnus-newsgroup-active was selected as I need
1788 ;; a gnus-summary local variable that is NOT bound to any
1789 ;; value (its global value should default to nil).
1790 (dolist (mark gnus-agent-download-marks)
1791 (let ((arts (cdr (assq mark (gnus-info-marks
1792 (setq info (gnus-get-info group)))))))
1794 (setq marked-articles (nconc (gnus-uncompress-range arts)
1797 (setq marked-articles (sort marked-articles '<))
1799 ;; Fetch any new articles from the server
1800 (setq articles (gnus-agent-fetch-headers group))
1802 ;; Merge new articles with marked
1803 (setq articles (sort (append marked-articles articles) '<))
1806 ;; Parse them and see which articles we want to fetch.
1807 (setq gnus-newsgroup-dependencies
1808 (or gnus-newsgroup-dependencies
1809 (make-vector (length articles) 0)))
1810 (setq gnus-newsgroup-headers
1811 (or gnus-newsgroup-headers
1812 (gnus-get-newsgroup-headers-xover articles nil nil
1814 ;; `gnus-agent-overview-buffer' may be killed for
1815 ;; timeout reason. If so, recreate it.
1816 (gnus-agent-create-buffer)
1818 ;; Figure out how to select articles in this group
1819 (setq category (gnus-group-category group))
1823 (gnus-agent-find-parameter group 'agent-predicate)))
1825 ;; If the selection predicate requires scoring, score each header
1826 (unless (memq predicate '(gnus-agent-true gnus-agent-false))
1828 (gnus-agent-find-parameter group 'agent-score)))
1829 ;; Translate score-param into real one
1832 ((eq score-param 'file)
1833 (setq score-param (gnus-all-score-files group)))
1834 ((stringp (car score-param)))
1836 (setq score-param (list (list score-param)))))
1838 (gnus-score-headers score-param))))
1840 (unless (and (eq predicate 'gnus-agent-false)
1841 (not marked-articles))
1842 (let ((arts (list nil)))
1843 (let ((arts-tail arts)
1844 (alist (gnus-agent-load-alist group))
1845 (marked-articles marked-articles)
1846 (gnus-newsgroup-headers gnus-newsgroup-headers))
1847 (while (setq gnus-headers (pop gnus-newsgroup-headers))
1848 (let ((num (mail-header-number gnus-headers)))
1849 ;; Determine if this article is already in the cache
1851 (> num (caar alist)))
1852 (setq alist (cdr alist)))
1854 (unless (and (eq num (caar alist))
1857 ;; Determine if this article was marked for download.
1858 (while (and marked-articles
1859 (> num (car marked-articles)))
1860 (setq marked-articles
1861 (cdr marked-articles)))
1863 ;; When this article is marked, or selected by the
1864 ;; predicate, add it to the download list
1865 (when (or (eq num (car marked-articles))
1868 (assq num gnus-newsgroup-scored))
1869 gnus-summary-default-score))
1870 (gnus-agent-long-article
1871 (gnus-agent-find-parameter
1872 group 'agent-long-article))
1873 (gnus-agent-short-article
1874 (gnus-agent-find-parameter
1875 group 'agent-short-article))
1876 (gnus-agent-low-score
1877 (gnus-agent-find-parameter
1878 group 'agent-low-score))
1879 (gnus-agent-high-score
1880 (gnus-agent-find-parameter
1881 group 'agent-high-score))
1882 (gnus-agent-expire-days
1883 (gnus-agent-find-parameter
1884 group 'agent-days-until-old)))
1885 (funcall predicate)))
1886 (gnus-agent-append-to-list arts-tail num))))))
1888 (let (fetched-articles)
1889 ;; Fetch all selected articles
1890 (setq gnus-newsgroup-undownloaded
1891 (gnus-sorted-ndifference
1892 gnus-newsgroup-undownloaded
1893 (setq fetched-articles
1895 (gnus-agent-fetch-articles group (cdr arts))
1898 (let ((unfetched-articles
1899 (gnus-sorted-ndifference (cdr arts) fetched-articles)))
1900 (if gnus-newsgroup-active
1901 ;; Update the summary buffer
1903 (dolist (article marked-articles)
1904 (gnus-summary-set-agent-mark article t))
1905 (dolist (article fetched-articles)
1906 (if gnus-agent-mark-unread-after-downloaded
1907 (gnus-summary-mark-article
1908 article gnus-unread-mark))
1909 (when (gnus-summary-goto-subject article nil t)
1910 (gnus-summary-update-download-mark article)))
1911 (dolist (article unfetched-articles)
1912 (gnus-summary-mark-article
1913 article gnus-canceled-mark)))
1915 ;; Update the group buffer.
1917 ;; When some, or all, of the marked articles came
1918 ;; from the download mark. Remove that mark. I
1919 ;; didn't do this earlier as I only want to remove
1920 ;; the marks after the fetch is completed.
1922 (dolist (mark gnus-agent-download-marks)
1923 (when (eq mark 'download)
1925 (assq mark (gnus-info-marks
1926 (setq info (gnus-get-info group))))))
1927 (when (cdr marked-arts)
1929 (delq marked-arts (gnus-info-marks info)))
1930 (gnus-info-set-marks info marks)))))
1931 (let ((read (gnus-info-read
1932 (or info (setq info (gnus-get-info group))))))
1934 info (gnus-add-to-range read unfetched-articles)))
1936 (gnus-group-update-group group t)
1940 (concat "(gnus-group-set-info '"
1941 (gnus-prin1-to-string info)
1945 ;;; Agent Category Mode
1948 (defvar gnus-category-mode-hook nil
1949 "Hook run in `gnus-category-mode' buffers.")
1951 (defvar gnus-category-line-format " %(%20c%): %g\n"
1952 "Format of category lines.
1954 Valid specifiers include:
1955 %c Topic name (string)
1956 %g The number of groups in the topic (integer)
1958 General format specifiers can also be used. See Info node
1959 `(gnus)Formatting Variables'.")
1961 (defvar gnus-category-mode-line-format "Gnus: %%b"
1962 "The format specification for the category mode line.")
1964 (defvar gnus-agent-short-article 100
1965 "Articles that have fewer lines than this are short.")
1967 (defvar gnus-agent-long-article 200
1968 "Articles that have more lines than this are long.")
1970 (defvar gnus-agent-low-score 0
1971 "Articles that have a score lower than this have a low score.")
1973 (defvar gnus-agent-high-score 0
1974 "Articles that have a score higher than this have a high score.")
1977 ;;; Internal variables.
1979 (defvar gnus-category-buffer "*Agent Category*")
1981 (defvar gnus-category-line-format-alist
1982 `((?c gnus-tmp-name ?s)
1983 (?g gnus-tmp-groups ?d)))
1985 (defvar gnus-category-mode-line-format-alist
1986 `((?u user-defined ?s)))
1988 (defvar gnus-category-line-format-spec nil)
1989 (defvar gnus-category-mode-line-format-spec nil)
1991 (defvar gnus-category-mode-map nil)
1992 (put 'gnus-category-mode 'mode-class 'special)
1994 (unless gnus-category-mode-map
1995 (setq gnus-category-mode-map (make-sparse-keymap))
1996 (suppress-keymap gnus-category-mode-map)
1998 (gnus-define-keys gnus-category-mode-map
1999 "q" gnus-category-exit
2000 "k" gnus-category-kill
2001 "c" gnus-category-copy
2002 "a" gnus-category-add
2003 "e" gnus-agent-customize-category
2004 "p" gnus-category-edit-predicate
2005 "g" gnus-category-edit-groups
2006 "s" gnus-category-edit-score
2007 "l" gnus-category-list
2009 "\C-c\C-i" gnus-info-find-node
2010 "\C-c\C-b" gnus-bug))
2012 (defvar gnus-category-menu-hook nil
2013 "*Hook run after the creation of the menu.")
2015 (defun gnus-category-make-menu-bar ()
2016 (gnus-turn-off-edit-menu 'category)
2017 (unless (boundp 'gnus-category-menu)
2019 gnus-category-menu gnus-category-mode-map ""
2021 ["Add" gnus-category-add t]
2022 ["Kill" gnus-category-kill t]
2023 ["Copy" gnus-category-copy t]
2024 ["Edit category" gnus-agent-customize-category t]
2025 ["Edit predicate" gnus-category-edit-predicate t]
2026 ["Edit score" gnus-category-edit-score t]
2027 ["Edit groups" gnus-category-edit-groups t]
2028 ["Exit" gnus-category-exit t]))
2030 (gnus-run-hooks 'gnus-category-menu-hook)))
2032 (defun gnus-category-mode ()
2033 "Major mode for listing and editing agent categories.
2035 All normal editing commands are switched off.
2036 \\<gnus-category-mode-map>
2037 For more in-depth information on this mode, read the manual
2038 \(`\\[gnus-info-find-node]').
2040 The following commands are available:
2042 \\{gnus-category-mode-map}"
2044 (when (gnus-visual-p 'category-menu 'menu)
2045 (gnus-category-make-menu-bar))
2046 (kill-all-local-variables)
2047 (gnus-simplify-mode-line)
2048 (setq major-mode 'gnus-category-mode)
2049 (setq mode-name "Category")
2050 (gnus-set-default-directory)
2051 (setq mode-line-process nil)
2052 (use-local-map gnus-category-mode-map)
2053 (buffer-disable-undo)
2054 (setq truncate-lines t)
2055 (setq buffer-read-only t)
2056 (gnus-run-hooks 'gnus-category-mode-hook))
2058 (defalias 'gnus-category-position-point 'gnus-goto-colon)
2060 (defun gnus-category-insert-line (category)
2061 (let* ((gnus-tmp-name (format "%s" (car category)))
2062 (gnus-tmp-groups (length (gnus-agent-cat-groups category))))
2064 (gnus-add-text-properties
2068 (eval gnus-category-line-format-spec))
2069 (list 'gnus-category gnus-tmp-name))))
2071 (defun gnus-enter-category-buffer ()
2072 "Go to the Category buffer."
2074 (gnus-category-setup-buffer)
2075 (gnus-configure-windows 'category)
2076 (gnus-category-prepare))
2078 (defun gnus-category-setup-buffer ()
2079 (unless (get-buffer gnus-category-buffer)
2081 (set-buffer (gnus-get-buffer-create gnus-category-buffer))
2082 (gnus-category-mode))))
2084 (defun gnus-category-prepare ()
2085 (gnus-set-format 'category-mode)
2086 (gnus-set-format 'category t)
2087 (let ((alist gnus-category-alist)
2088 (buffer-read-only nil))
2091 (gnus-category-insert-line (pop alist)))
2092 (goto-char (point-min))
2093 (gnus-category-position-point)))
2095 (defun gnus-category-name ()
2096 (or (intern (get-text-property (gnus-point-at-bol) 'gnus-category))
2097 (error "No category on the current line")))
2099 (defun gnus-category-read ()
2100 "Read the category alist."
2101 (setq gnus-category-alist
2105 (nnheader-insert-file-contents (nnheader-concat gnus-agent-directory "lib/categories"))
2106 (goto-char (point-min))
2107 ;; This code isn't temp, it will be needed so long as
2108 ;; anyone may be migrating from an older version.
2110 ;; Once we're certain that people will not revert to an
2111 ;; earlier version, we can take out the old-list code in
2112 ;; gnus-category-write.
2113 (let* ((old-list (read (current-buffer)))
2114 (new-list (ignore-errors (read (current-buffer)))))
2117 ;; Convert from a positional list to an alist.
2127 '(agent-predicate agent-score-file agent-groups))))
2130 (list (gnus-agent-cat-make 'default)))))
2132 (defun gnus-category-write ()
2133 "Write the category alist."
2134 (setq gnus-category-predicate-cache nil
2135 gnus-category-group-cache nil)
2136 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
2137 (with-temp-file (nnheader-concat gnus-agent-directory "lib/categories")
2138 ;; This prin1 is temporary. It exists so that people can revert
2139 ;; to an earlier version of gnus-agent.
2140 (prin1 (mapcar (lambda (c)
2142 (cdr (assoc 'agent-predicate c))
2143 (cdr (assoc 'agent-score-file c))
2144 (cdr (assoc 'agent-groups c))))
2145 gnus-category-alist)
2148 (prin1 gnus-category-alist (current-buffer))))
2150 (defun gnus-category-edit-predicate (category)
2151 "Edit the predicate for CATEGORY."
2152 (interactive (list (gnus-category-name)))
2153 (let ((info (assq category gnus-category-alist)))
2155 (gnus-agent-cat-predicate info)
2156 (format "Editing the select predicate for category %s" category)
2157 `(lambda (predicate)
2158 ;; Avoid run-time execution of setf form
2159 ;; (setf (gnus-agent-cat-predicate (assq ',category gnus-category-alist))
2161 ;; use its expansion instead:
2162 (gnus-agent-cat-set-property (assq ',category gnus-category-alist)
2163 'agent-predicate predicate)
2165 (gnus-category-write)
2166 (gnus-category-list)))))
2168 (defun gnus-category-edit-score (category)
2169 "Edit the score expression for CATEGORY."
2170 (interactive (list (gnus-category-name)))
2171 (let ((info (assq category gnus-category-alist)))
2173 (gnus-agent-cat-score-file info)
2174 (format "Editing the score expression for category %s" category)
2175 `(lambda (score-file)
2176 ;; Avoid run-time execution of setf form
2177 ;; (setf (gnus-agent-cat-score-file (assq ',category gnus-category-alist))
2179 ;; use its expansion instead:
2180 (gnus-agent-cat-set-property (assq ',category gnus-category-alist)
2181 'agent-score-file score-file)
2183 (gnus-category-write)
2184 (gnus-category-list)))))
2186 (defun gnus-category-edit-groups (category)
2187 "Edit the group list for CATEGORY."
2188 (interactive (list (gnus-category-name)))
2189 (let ((info (assq category gnus-category-alist)))
2191 (gnus-agent-cat-groups info)
2192 (format "Editing the group list for category %s" category)
2194 ;; Avoid run-time execution of setf form
2195 ;; (setf (gnus-agent-cat-groups (assq ',category gnus-category-alist))
2197 ;; use its expansion instead:
2198 (gnus-agent-set-cat-groups (assq ',category gnus-category-alist)
2201 (gnus-category-write)
2202 (gnus-category-list)))))
2204 (defun gnus-category-kill (category)
2205 "Kill the current category."
2206 (interactive (list (gnus-category-name)))
2207 (let ((info (assq category gnus-category-alist))
2208 (buffer-read-only nil))
2210 (setq gnus-category-alist (delq info gnus-category-alist))
2211 (gnus-category-write)))
2213 (defun gnus-category-copy (category to)
2214 "Copy the current category."
2215 (interactive (list (gnus-category-name) (intern (read-string "New name: "))))
2216 (let ((info (assq category gnus-category-alist)))
2217 (push (let ((newcat (gnus-copy-sequence info)))
2218 (setf (gnus-agent-cat-name newcat) to)
2219 (setf (gnus-agent-cat-groups newcat) nil)
2221 gnus-category-alist)
2222 (gnus-category-write)
2223 (gnus-category-list)))
2225 (defun gnus-category-add (category)
2226 "Create a new category."
2227 (interactive "SCategory name: ")
2228 (when (assq category gnus-category-alist)
2229 (error "Category %s already exists" category))
2230 (push (gnus-agent-cat-make category)
2231 gnus-category-alist)
2232 (gnus-category-write)
2233 (gnus-category-list))
2235 (defun gnus-category-list ()
2236 "List all categories."
2238 (gnus-category-prepare))
2240 (defun gnus-category-exit ()
2241 "Return to the group buffer."
2243 (kill-buffer (current-buffer))
2244 (gnus-configure-windows 'group t))
2246 ;; To avoid having 8-bit characters in the source file.
2247 (defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))
2249 (defvar gnus-category-predicate-alist
2250 '((spam . gnus-agent-spam-p)
2251 (short . gnus-agent-short-p)
2252 (long . gnus-agent-long-p)
2253 (low . gnus-agent-low-scored-p)
2254 (high . gnus-agent-high-scored-p)
2255 (read . gnus-agent-read-p)
2256 (true . gnus-agent-true)
2257 (false . gnus-agent-false))
2258 "Mapping from short score predicate symbols to predicate functions.")
2260 (defun gnus-agent-spam-p ()
2261 "Say whether an article is spam or not."
2262 (unless gnus-agent-spam-hashtb
2263 (setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
2264 (if (not (equal (mail-header-references gnus-headers) ""))
2266 (let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
2268 (gnus-gethash string gnus-agent-spam-hashtb)
2269 (gnus-sethash string t gnus-agent-spam-hashtb)))))
2271 (defun gnus-agent-short-p ()
2272 "Say whether an article is short or not."
2273 (< (mail-header-lines gnus-headers) gnus-agent-short-article))
2275 (defun gnus-agent-long-p ()
2276 "Say whether an article is long or not."
2277 (> (mail-header-lines gnus-headers) gnus-agent-long-article))
2279 (defun gnus-agent-low-scored-p ()
2280 "Say whether an article has a low score or not."
2281 (< gnus-score gnus-agent-low-score))
2283 (defun gnus-agent-high-scored-p ()
2284 "Say whether an article has a high score or not."
2285 (> gnus-score gnus-agent-high-score))
2287 (defun gnus-agent-read-p ()
2288 "Say whether an article is read or not."
2289 (gnus-member-of-range (mail-header-number gnus-headers)
2290 (gnus-info-read (gnus-get-info gnus-newsgroup-name))))
2292 (defun gnus-category-make-function (predicate)
2293 "Make a function from PREDICATE."
2294 (let ((func (gnus-category-make-function-1 predicate)))
2295 (if (and (= (length func) 1)
2296 (symbolp (car func)))
2298 (gnus-byte-compile `(lambda () ,func)))))
2300 (defun gnus-agent-true ()
2304 (defun gnus-agent-false ()
2308 (defun gnus-category-make-function-1 (predicate)
2309 "Make a function from PREDICATE."
2311 ;; Functions are just returned as is.
2312 ((or (symbolp predicate)
2313 (gnus-functionp predicate))
2314 `(,(or (cdr (assq predicate gnus-category-predicate-alist))
2316 ;; More complex predicate.
2319 ((memq (car predicate) '(& and))
2321 ((memq (car predicate) '(| or))
2323 ((memq (car predicate) gnus-category-not)
2325 ,@(mapcar 'gnus-category-make-function-1 (cdr predicate))))
2327 (error "Unknown predicate type: %s" predicate))))
2329 (defun gnus-get-predicate (predicate)
2330 "Return the function implementing PREDICATE."
2331 (or (cdr (assoc predicate gnus-category-predicate-cache))
2332 (let ((func (gnus-category-make-function predicate)))
2333 (setq gnus-category-predicate-cache
2334 (nconc gnus-category-predicate-cache
2335 (list (cons predicate func))))
2338 (defun gnus-predicate-implies-unread (predicate)
2339 "Say whether PREDICATE implies unread articles only.
2340 It is okay to miss some cases, but there must be no false positives.
2341 That is, if this function returns true, then indeed the predicate must
2342 return only unread articles."
2343 (gnus-function-implies-unread-1 (gnus-category-make-function predicate)))
2345 (defun gnus-function-implies-unread-1 (function)
2346 (cond ((eq function (symbol-function 'gnus-agent-read-p))
2350 ((gnus-functionp function)
2352 ((memq (car function) '(or and not))
2353 (apply (car function)
2354 (mapcar 'gnus-function-implies-unread-1 (cdr function))))
2356 (error "Unknown function: %s" function))))
2358 (defun gnus-group-category (group)
2359 "Return the category GROUP belongs to."
2360 (unless gnus-category-group-cache
2361 (setq gnus-category-group-cache (gnus-make-hashtable 1000))
2362 (let ((cs gnus-category-alist)
2364 (while (setq cat (pop cs))
2365 (setq groups (gnus-agent-cat-groups cat))
2367 (gnus-sethash (pop groups) cat gnus-category-group-cache)))))
2368 (or (gnus-gethash group gnus-category-group-cache)
2369 (assq 'default gnus-category-alist)))
2371 (defun gnus-agent-expire-group (group &optional articles force)
2372 "Expire all old articles in GROUP.
2373 If you want to force expiring of certain articles, this function can
2374 take ARTICLES, and FORCE parameters as well.
2376 The articles on which the expiration process runs are selected as follows:
2377 if ARTICLES is null, all read and unmarked articles.
2378 if ARTICLES is t, all articles.
2379 if ARTICLES is a list, just those articles.
2380 FORCE is equivalent to setting the expiration predicates to true."
2382 (list (let ((def (or (gnus-group-group-name)
2383 gnus-newsgroup-name)))
2384 (let ((select (read-string (if def
2385 (concat "Group Name ("
2388 (if (and (equal "" select)
2394 (gnus-agent-expire articles group force)
2395 (if (or (not (eq articles t))
2397 (concat "Are you sure that you want to "
2398 "expire all articles in " group ".")))
2399 (let ((gnus-command-method (gnus-find-method-for-group group))
2400 (overview (gnus-get-buffer-create " *expire overview*"))
2403 (when (file-exists-p (gnus-agent-lib-file "active"))
2405 (nnheader-insert-file-contents
2406 (gnus-agent-lib-file "active"))
2407 (gnus-active-to-gnus-format
2409 (setq orig (gnus-make-hashtable
2410 (count-lines (point-min) (point-max))))))
2412 (gnus-agent-expire-group-1
2413 group overview (gnus-gethash-safe group orig)
2415 (kill-buffer overview))))
2416 (gnus-message 4 "Expiry...done")))
2418 (defun gnus-agent-expire-group-1 (group overview active articles force)
2419 ;; Internal function - requires caller to have set
2420 ;; gnus-command-method, initialized overview buffer, and to have
2421 ;; provided a non-nil active
2423 (if (eq 'DISABLE (gnus-agent-find-parameter group 'agent-enable-expiration))
2424 (gnus-message 5 "Expiry skipping over %s" group)
2425 (gnus-message 5 "Expiring articles in %s" group)
2426 (gnus-agent-load-alist group)
2427 (let* ((info (gnus-get-info group))
2428 (alist gnus-agent-article-alist)
2430 (gnus-agent-directory)
2431 (gnus-agent-group-path group)
2433 (day (- (time-to-days (current-time))
2434 (gnus-agent-find-parameter group 'agent-days-until-old)))
2435 (specials (if (and alist
2437 ;; This could be a bit of a problem. I need to
2438 ;; keep the last article to avoid refetching
2439 ;; headers when using nntp in the backend. At
2440 ;; the same time, if someone uses a backend
2441 ;; that supports article moving then I may have
2442 ;; to remove the last article to complete the
2443 ;; move. Right now, I'm going to assume that
2444 ;; FORCE overrides specials.
2445 (list (caar (last alist)))))
2446 (unreads ;; Articles that are excluded from the
2447 ;; expiration process
2448 (cond (gnus-agent-expire-all
2449 ;; All articles are marked read by global decree
2452 ;; All articles are marked read by function
2456 ;; Unread articles are marked protected from
2457 ;; expiration Don't call
2458 ;; gnus-list-of-unread-articles as it returns
2459 ;; articles that have not been fetched into the
2462 (gnus-agent-unread-articles group)))
2464 ;; All articles EXCEPT those named by the caller
2465 ;; are protected from expiration
2466 (gnus-sorted-difference
2467 (gnus-uncompress-range
2469 (caar (last alist))))
2470 (sort articles '<)))))
2471 (marked ;; More articles that are exluded from the
2472 ;; expiration process
2473 (cond (gnus-agent-expire-all
2474 ;; All articles are unmarked by global decree
2477 ;; All articles are unmarked by function
2481 ;; All articles may as well be unmarked as the
2482 ;; unreads list already names the articles we are
2486 ;; Ticked and/or dormant articles are excluded
2489 (gnus-uncompress-range
2490 (cdr (assq 'tick (gnus-info-marks info))))
2491 (gnus-uncompress-range
2493 (gnus-info-marks info))))))))
2494 (nov-file (concat dir ".overview"))
2500 ;; The normal article alist contains elements that look like
2501 ;; (article# . fetch_date) I need to combine other
2502 ;; information with this list. For example, a flag indicating
2503 ;; that a particular article MUST BE KEPT. To do this, I'm
2504 ;; going to transform the elements to look like (article#
2505 ;; fetch_date keep_flag NOV_entry_marker) Later, I'll reverse
2506 ;; the process to generate the expired article alist.
2508 ;; Convert the alist elements to (article# fetch_date nil
2510 (setq dlist (mapcar (lambda (e)
2511 (list (car e) (cdr e) nil nil)) alist))
2513 ;; Convert the keep lists to elements that look like (article#
2514 ;; nil keep_flag nil) then append it to the expanded dlist
2515 ;; These statements are sorted by ascending precidence of the
2517 (setq dlist (nconc dlist
2519 (list e nil 'unread nil))
2521 (setq dlist (nconc dlist
2523 (list e nil 'marked nil))
2525 (setq dlist (nconc dlist
2527 (list e nil 'special nil))
2530 (set-buffer overview)
2532 (when (file-exists-p nov-file)
2533 (gnus-message 7 "gnus-agent-expire: Loading overview...")
2534 (nnheader-insert-file-contents nov-file)
2535 (goto-char (point-min))
2538 (while (< (setq p (point)) (point-max))
2540 ;; If I successfully read an integer (the plus zero
2541 ;; ensures a numeric type), prepend a marker entry
2543 (push (list (+ 0 (read (current-buffer))) nil nil
2544 (set-marker (make-marker) p))
2547 (gnus-message 1 "gnus-agent-expire: read error \
2548 occurred when reading expression at %s in %s. Skipping to next \
2549 line." (point) nov-file)))
2550 ;; Whether I succeeded, or failed, it doesn't matter.
2551 ;; Move to the next line then try again.
2554 7 "gnus-agent-expire: Loading overview... Done"))
2555 (set-buffer-modified-p nil)
2557 ;; At this point, all of the information is in dlist. The
2558 ;; only problem is that much of it is spread across multiple
2559 ;; entries. Sort then MERGE!!
2560 (gnus-message 7 "gnus-agent-expire: Sorting entries... ")
2561 ;; If two entries have the same article-number then sort by
2562 ;; ascending keep_flag.
2569 (cond ((< (nth 0 a) (nth 0 b))
2571 ((> (nth 0 a) (nth 0 b))
2574 (let ((a (or (symbol-value (nth 2 a))
2576 (b (or (symbol-value (nth 2 b))
2579 (gnus-message 7 "gnus-agent-expire: Sorting entries... Done")
2580 (gnus-message 7 "gnus-agent-expire: Merging entries... ")
2581 (let ((dlist dlist))
2582 (while (cdr dlist) ; I'm not at the end-of-list
2583 (if (eq (caar dlist) (caadr dlist))
2584 (let ((first (cdr (car dlist)))
2585 (secnd (cdr (cadr dlist))))
2586 (setcar first (or (car first)
2587 (car secnd))) ; fetch_date
2588 (setq first (cdr first)
2590 (setcar first (or (car first)
2591 (car secnd))) ; Keep_flag
2592 (setq first (cdr first)
2594 (setcar first (or (car first)
2595 (car secnd))) ; NOV_entry_marker
2597 (setcdr dlist (cddr dlist)))
2598 (setq dlist (cdr dlist)))))
2599 (gnus-message 7 "gnus-agent-expire: Merging entries... Done")
2601 (let* ((len (float (length dlist)))
2605 (let ((new-completed (truncate (* 100.0
2606 (/ (setq cnt (1+ cnt))
2608 (when (> new-completed completed)
2609 (setq completed new-completed)
2610 (gnus-message 9 "%3d%% completed..." completed)))
2611 (let* ((entry (car dlist))
2612 (article-number (nth 0 entry))
2613 (fetch-date (nth 1 entry))
2614 (keep (nth 2 entry))
2615 (marker (nth 3 entry)))
2618 ;; Kept articles are unread, marked, or special.
2621 "gnus-agent-expire: Article %d: Kept %s article."
2622 article-number keep)
2624 (unless (file-exists-p
2625 (concat dir (number-to-string
2627 (setf (nth 1 entry) nil)
2628 (gnus-message 3 "gnus-agent-expire cleared \
2629 download flag on article %d as the cached article file is missing."
2632 (gnus-message 1 "gnus-agent-expire detected a \
2633 missing NOV entry. Run gnus-agent-regenerate-group to restore it.")))
2634 (gnus-agent-append-to-list
2636 (cons article-number fetch-date)))
2638 ;; The following articles are READ, UNMARKED, and
2639 ;; ORDINARY. See if they can be EXPIRED!!!
2642 ((not (integerp fetch-date))
2643 'read) ;; never fetched article (may expire
2645 ((not (file-exists-p
2646 (concat dir (number-to-string
2648 (setf (nth 1 entry) nil)
2649 'externally-expired) ;; Can't find the cached
2650 ;; article. Handle case
2651 ;; as though this article
2652 ;; was never fetched.
2654 ;; We now have the arrival day, so we see
2655 ;; whether it's old enough to be expired.
2661 ;; I found some reason to expire this entry.
2663 (let ((actions nil))
2664 (when (memq type '(forced expired))
2665 (ignore-errors ; Just being paranoid.
2666 (delete-file (concat dir (number-to-string
2668 (push "expired cached article" actions))
2669 (setf (nth 1 entry) nil)
2673 (push "NOV entry removed" actions)
2677 ;; If considering all articles is set, I can only
2678 ;; expire article IDs that are no longer in the
2680 (if (and gnus-agent-consider-all-articles
2681 (>= article-number (car active)))
2682 ;; I have to keep this ID in the alist
2683 (gnus-agent-append-to-list
2684 tail-alist (cons article-number fetch-date))
2685 (push (format "Removed %s article number from \
2686 article alist" type) actions))
2688 (gnus-message 7 "gnus-agent-expire: Article %d: %s"
2690 (mapconcat 'identity actions ", "))))
2693 10 "gnus-agent-expire: Article %d: Article kept as \
2694 expiration tests failed." article-number)
2695 (gnus-agent-append-to-list
2696 tail-alist (cons article-number fetch-date)))
2699 ;; Clean up markers as I want to recycle this buffer
2700 ;; over several groups.
2702 (set-marker marker nil))
2704 (setq dlist (cdr dlist))))
2706 (setq alist (cdr alist))
2708 (let ((inhibit-quit t))
2709 (unless (equal alist gnus-agent-article-alist)
2710 (setq gnus-agent-article-alist alist)
2711 (gnus-agent-save-alist group))
2713 (when (buffer-modified-p)
2714 (let ((coding-system-for-write
2715 gnus-agent-file-coding-system))
2716 (gnus-make-directory dir)
2717 (write-region (point-min) (point-max) nov-file nil
2719 ;; clear the modified flag as that I'm not confused by
2720 ;; its status on the next pass through this routine.
2721 (set-buffer-modified-p nil)))
2723 (when (eq articles t)
2724 (gnus-summary-update-info)))))))
2726 (defun gnus-agent-expire (&optional articles group force)
2727 "Expire all old articles.
2728 If you want to force expiring of certain articles, this function can
2729 take ARTICLES, GROUP and FORCE parameters as well.
2731 The articles on which the expiration process runs are selected as follows:
2732 if ARTICLES is null, all read and unmarked articles.
2733 if ARTICLES is t, all articles.
2734 if ARTICLES is a list, just those articles.
2735 Setting GROUP will limit expiration to that group.
2736 FORCE is equivalent to setting the expiration predicates to true."
2740 (gnus-agent-expire-group group articles force)
2741 (if (or (not (eq articles t))
2742 (yes-or-no-p "Are you sure that you want to expire all \
2743 articles in every agentized group."))
2744 (let ((methods gnus-agent-covered-methods)
2745 gnus-command-method overview orig)
2746 (setq overview (gnus-get-buffer-create " *expire overview*"))
2748 (while (setq gnus-command-method (pop methods))
2749 (when (file-exists-p (gnus-agent-lib-file "active"))
2751 (nnheader-insert-file-contents
2752 (gnus-agent-lib-file "active"))
2753 (gnus-active-to-gnus-format
2755 (setq orig (gnus-make-hashtable
2756 (count-lines (point-min) (point-max))))))
2757 (dolist (expiring-group (gnus-groups-from-server
2758 gnus-command-method))
2760 (gnus-gethash-safe expiring-group orig)))
2764 (gnus-agent-expire-group-1
2765 expiring-group overview active articles force)))))))
2766 (kill-buffer overview))
2767 (gnus-message 4 "Expiry...done")))))
2770 (defun gnus-agent-batch ()
2771 "Start Gnus, send queue and fetch session."
2773 (let ((init-file-user "")
2774 (gnus-always-read-dribble-file t))
2776 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
2777 (gnus-group-send-queue)
2778 (gnus-agent-fetch-session)))
2780 (defun gnus-agent-unread-articles (group)
2781 (let* ((read (gnus-info-read (gnus-get-info group)))
2782 (known (gnus-agent-load-alist group))
2784 (tail-unread unread))
2785 (while (and known read)
2786 (let ((candidate (car (pop known))))
2787 (while (let* ((range (car read))
2788 (min (if (numberp range) range (car range)))
2789 (max (if (numberp range) range (cdr range))))
2790 (cond ((or (not min)
2792 (gnus-agent-append-to-list tail-unread candidate)
2797 (gnus-agent-append-to-list tail-unread (car (pop known))))
2800 (defun gnus-agent-uncached-articles (articles group &optional cached-header)
2801 "Restrict ARTICLES to numbers already fetched.
2802 Returns a sublist of ARTICLES that excludes thos article ids in GROUP
2803 that have already been fetched.
2804 If CACHED-HEADER is nil, articles are only excluded if the article itself
2807 ;; Logically equivalent to: (gnus-sorted-difference articles (mapcar
2808 ;; 'car gnus-agent-article-alist))
2810 ;; Functionally, I don't need to construct a temp list using mapcar.
2812 (if (and (or gnus-agent-cache (not gnus-plugged))
2813 (gnus-agent-load-alist group))
2814 (let* ((ref gnus-agent-article-alist)
2816 (uncached (list nil))
2817 (tail-uncached uncached))
2818 (while (and ref arts)
2819 (let ((v1 (car arts))
2821 (cond ((< v1 v2) ; v1 does not appear in the reference list
2822 (gnus-agent-append-to-list tail-uncached v1)
2825 (unless (or cached-header (cdar ref)) ; v1 is already cached
2826 (gnus-agent-append-to-list tail-uncached v1))
2829 (t ; reference article (v2) preceeds the list being filtered
2832 (gnus-agent-append-to-list tail-uncached (pop arts)))
2834 ;; if gnus-agent-load-alist fails, no articles are cached.
2837 (defun gnus-agent-retrieve-headers (articles group &optional fetch-old)
2839 (gnus-agent-create-buffer)
2840 (let ((gnus-decode-encoded-word-function 'identity)
2841 (file (gnus-agent-article-name ".overview" group))
2842 cached-articles uncached-articles)
2843 (gnus-make-directory (nnheader-translate-file-chars
2844 (file-name-directory file) t))
2846 ;; Populate temp buffer with known headers
2847 (when (file-exists-p file)
2848 (with-current-buffer gnus-agent-overview-buffer
2850 (let ((nnheader-file-coding-system
2851 gnus-agent-file-coding-system))
2852 (nnheader-insert-nov-file file (car articles)))))
2854 (if (setq uncached-articles (gnus-agent-uncached-articles articles group
2857 ;; Populate nntp-server-buffer with uncached headers
2858 (set-buffer nntp-server-buffer)
2860 (cond ((not (eq 'nov (let (gnus-agent) ; Turn off agent
2861 (gnus-retrieve-headers
2862 uncached-articles group fetch-old))))
2863 (nnvirtual-convert-headers))
2864 ((eq 'nntp (car gnus-current-select-method))
2865 ;; The author of gnus-get-newsgroup-headers-xover
2866 ;; reports that the XOVER command is commonly
2867 ;; unreliable. The problem is that recently
2868 ;; posted articles may not be entered into the
2869 ;; NOV database in time to respond to my XOVER
2872 ;; I'm going to use his assumption that the NOV
2873 ;; database is updated in order of ascending
2874 ;; article ID. Therefore, a response containing
2875 ;; article ID N implies that all articles from 1
2876 ;; to N-1 are up-to-date. Therefore, missing
2877 ;; articles in that range have expired.
2879 (set-buffer nntp-server-buffer)
2880 (let* ((fetched-articles (list nil))
2881 (tail-fetched-articles fetched-articles)
2882 (min (cond ((numberp fetch-old)
2883 (max 1 (- (car articles) fetch-old)))
2888 (max (car (last articles))))
2890 ;; Get the list of articles that were fetched
2891 (goto-char (point-min))
2892 (let ((pm (point-max)))
2893 (while (< (point) pm)
2894 (when (looking-at "[0-9]+\t")
2895 (gnus-agent-append-to-list
2896 tail-fetched-articles
2897 (read (current-buffer))))
2900 ;; Clip this list to the headers that will
2901 ;; actually be returned
2902 (setq fetched-articles (gnus-list-range-intersection
2903 (cdr fetched-articles)
2906 ;; Clip the uncached articles list to exclude
2907 ;; IDs after the last FETCHED header. The
2908 ;; excluded IDs may be fetchable using HEAD.
2909 (if (car tail-fetched-articles)
2910 (setq uncached-articles
2911 (gnus-list-range-intersection
2913 (cons (car uncached-articles)
2914 (car tail-fetched-articles)))))
2916 ;; Create the list of articles that were
2917 ;; "successfully" fetched. Success, in this
2918 ;; case, means that the ID should not be
2919 ;; fetched again. In the case of an expired
2920 ;; article, the header will not be fetched.
2921 (setq uncached-articles
2922 (gnus-sorted-nunion fetched-articles
2926 ;; Erase the temp buffer
2927 (set-buffer gnus-agent-overview-buffer)
2930 ;; Copy the nntp-server-buffer to the temp buffer
2931 (set-buffer nntp-server-buffer)
2932 (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
2934 ;; Merge the temp buffer with the known headers (found on
2935 ;; disk in FILE) into the nntp-server-buffer
2936 (when (and uncached-articles (file-exists-p file))
2937 (gnus-agent-braid-nov group uncached-articles file))
2939 ;; Save the new set of known headers to FILE
2940 (set-buffer nntp-server-buffer)
2941 (let ((coding-system-for-write
2942 gnus-agent-file-coding-system))
2943 (gnus-agent-check-overview-buffer)
2944 (write-region (point-min) (point-max) file nil 'silent))
2946 ;; Update the group's article alist to include the newly
2947 ;; fetched articles.
2948 (gnus-agent-load-alist group)
2949 (gnus-agent-save-alist group uncached-articles nil)
2952 ;; Copy the temp buffer to the nntp-server-buffer
2953 (set-buffer nntp-server-buffer)
2955 (insert-buffer-substring gnus-agent-overview-buffer)))
2958 (not (numberp fetch-old)))
2959 t ; Don't remove anything.
2960 (nnheader-nov-delete-outside-range
2961 (if fetch-old (max 1 (- (car articles) fetch-old))
2963 (car (last articles)))
2968 (defun gnus-agent-request-article (article group)
2969 "Retrieve ARTICLE in GROUP from the agent cache."
2970 (when (and gnus-agent
2971 (or gnus-agent-cache
2974 (let* ((gnus-command-method (gnus-find-method-for-group group))
2976 (gnus-agent-directory)
2977 (gnus-agent-group-path group) "/"
2978 (number-to-string article)))
2979 (buffer-read-only nil))
2980 (when (and (file-exists-p file)
2981 (> (nth 7 (file-attributes file)) 0))
2983 (gnus-kill-all-overlays)
2984 (let ((coding-system-for-read gnus-cache-coding-system))
2985 (insert-file-contents file))
2988 (defun gnus-agent-regenerate-group (group &optional reread)
2990 If REREAD is t, all articles in the .overview are marked as unread.
2991 If REREAD is not nil, downloaded articles are marked as unread."
2993 (list (let ((def (or (gnus-group-group-name)
2994 gnus-newsgroup-name)))
2995 (let ((select (read-string (if def
2996 (concat "Group Name ("
2999 (if (and (equal "" select)
3005 "Reread (nil)? (t=>all, nil=>none, some=>all downloaded): "))))
3006 (gnus-message 5 "Regenerating in %s" group)
3007 (let* ((gnus-command-method (or gnus-command-method
3008 (gnus-find-method-for-group group)))
3009 (file (gnus-agent-article-name ".overview" group))
3010 (dir (file-name-directory file))
3012 (downloaded (if (file-exists-p dir)
3013 (sort (mapcar (lambda (name) (string-to-int name))
3014 (directory-files dir nil "^[0-9]+$" t))
3016 (progn (gnus-make-directory dir) nil)))
3021 (mm-with-unibyte-buffer
3022 (if (file-exists-p file)
3023 (let ((nnheader-file-coding-system
3024 gnus-agent-file-coding-system))
3025 (nnheader-insert-file-contents file)))
3026 (set-buffer-modified-p nil)
3028 ;; Load the article IDs found in the overview file. As a
3029 ;; side-effect, validate the file contents.
3033 (goto-char (point-min))
3034 (while (< (point) (point-max))
3035 (cond ((and (looking-at "[0-9]+\t")
3036 (<= (- (match-end 0) (match-beginning 0)) 9))
3037 (push (read (current-buffer)) nov-arts)
3039 (let ((l1 (car nov-arts))
3040 (l2 (cadr nov-arts)))
3044 (gnus-message 3 "gnus-agent-regenerate-group: NOV\
3045 entries are NOT in ascending order.")
3046 ;; Don't sort now as I haven't verified
3047 ;; that every line begins with a number
3051 (gnus-message 4 "gnus-agent-regenerate-group: NOV\
3052 entries contained duplicate of article %s. Duplicate deleted." l1)
3056 (gnus-message 1 "gnus-agent-regenerate-group: NOV\
3057 entries contained line that did not begin with an article number. Deleted\
3059 (gnus-delete-line))))
3062 (gnus-message 5 "gnus-agent-regenerate-group: Sorting NOV\
3063 entries into ascending order.")
3064 (sort-numeric-fields 1 (point-min) (point-max))
3065 (setq nov-arts nil)))))
3066 (gnus-agent-check-overview-buffer)
3068 ;; Construct a new article alist whose nodes match every header
3069 ;; in the .overview file. As a side-effect, missing headers are
3070 ;; reconstructed from the downloaded article file.
3071 (while (or downloaded nov-arts)
3072 (cond ((and downloaded
3074 (> (car downloaded) (car nov-arts))))
3075 ;; This entry is missing from the overview file
3076 (gnus-message 3 "Regenerating NOV %s %d..." group
3078 (let ((file (concat dir (number-to-string (car downloaded)))))
3079 (mm-with-unibyte-buffer
3080 (nnheader-insert-file-contents file)
3081 (nnheader-remove-body)
3082 (setq header (nnheader-parse-naked-head)))
3083 (mail-header-set-number header (car downloaded))
3085 (let ((key (concat "^" (int-to-string (car nov-arts))
3087 (or (re-search-backward key nil t)
3088 (re-search-forward key))
3090 (goto-char (point-min)))
3091 (nnheader-insert-nov header))
3092 (setq nov-arts (cons (car downloaded) nov-arts)))
3093 ((eq (car downloaded) (car nov-arts))
3094 ;; This entry in the overview has been downloaded
3095 (push (cons (car downloaded)
3097 (nth 5 (file-attributes
3098 (concat dir (number-to-string
3099 (car downloaded))))))) alist)
3103 ;; This entry in the overview has not been downloaded
3104 (push (cons (car nov-arts) nil) alist)
3107 ;; When gnus-agent-consider-all-articles is set,
3108 ;; gnus-agent-regenerate-group should NOT remove article IDs from
3109 ;; the alist. Those IDs serve as markers to indicate that an
3110 ;; attempt has been made to fetch that article's header.
3112 ;; When gnus-agent-consider-all-articles is NOT set,
3113 ;; gnus-agent-regenerate-group can remove the article ID of every
3114 ;; article (with the exception of the last ID in the list - it's
3115 ;; special) that no longer appears in the overview. In this
3116 ;; situtation, the last article ID in the list implies that it,
3117 ;; and every article ID preceeding it, have been fetched from the
3119 (if gnus-agent-consider-all-articles
3120 ;; Restore all article IDs that were not found in the overview file.
3121 (let* ((n (cons nil alist))
3123 (o (gnus-agent-load-alist group)))
3125 (let ((nID (caadr n))
3128 (setq n (setcdr n (list (list oID))))
3131 (setcdr n (cons (list oID) (cdr n)))
3138 (setq alist (cdr merged)))
3139 ;; Restore the last article ID if it is not already in the new alist
3140 (let ((n (last alist))
3141 (o (last (gnus-agent-load-alist group))))
3145 (push (cons (caar o) nil) alist))
3146 ((< (caar n) (caar o))
3147 (setcdr n (list (car o)))))))
3149 (let ((inhibit-quit t))
3150 (if (setq regenerated (buffer-modified-p))
3151 (let ((coding-system-for-write gnus-agent-file-coding-system))
3152 (write-region (point-min) (point-max) file nil 'silent)))
3154 (setq regenerated (or regenerated
3155 (and reread gnus-agent-article-alist)
3156 (not (equal alist gnus-agent-article-alist)))
3159 (setq gnus-agent-article-alist alist)
3162 (gnus-agent-save-alist group)))
3165 (when (and reread gnus-agent-article-alist)
3166 (gnus-make-ascending-articles-unread
3168 (delq nil (mapcar (function (lambda (c)
3169 (cond ((eq reread t)
3173 gnus-agent-article-alist)))
3175 (when (gnus-buffer-live-p gnus-group-buffer)
3176 (gnus-group-update-group group t)
3180 (gnus-message 5 nil)
3184 (defun gnus-agent-regenerate (&optional clean reread)
3185 "Regenerate all agent covered files.
3186 If CLEAN, don't read existing active files."
3189 (gnus-message 4 "Regenerating Gnus agent files...")
3190 (dolist (gnus-command-method gnus-agent-covered-methods)
3191 (let ((active-file (gnus-agent-lib-file "active"))
3192 active-hashtb active-changed
3194 (gnus-make-directory (file-name-directory active-file))
3196 (setq active-hashtb (gnus-make-hashtable 1000))
3197 (mm-with-unibyte-buffer
3198 (if (file-exists-p active-file)
3199 (let ((nnheader-file-coding-system
3200 gnus-agent-file-coding-system))
3201 (nnheader-insert-file-contents active-file))
3202 (setq active-changed t))
3203 (gnus-active-to-gnus-format
3204 nil (setq active-hashtb
3205 (gnus-make-hashtable
3206 (count-lines (point-min) (point-max)))))))
3207 (dolist (group (gnus-groups-from-server gnus-command-method))
3208 (setq regenerated (or (gnus-agent-regenerate-group group reread)
3210 (let ((min (or (caar gnus-agent-article-alist) 1))
3211 (max (or (caar (last gnus-agent-article-alist)) 0))
3212 (active (gnus-gethash-safe (gnus-group-real-name group)
3214 (read (gnus-info-read (gnus-get-info group))))
3217 (setq active (cons min max)
3219 (gnus-sethash group active active-hashtb))
3220 (when (> (car active) min)
3222 (setq active-changed t))
3223 (when (< (cdr active) max)
3225 (setq active-changed t)))))
3226 (when active-changed
3227 (setq regenerated t)
3228 (gnus-message 4 "Regenerate %s" active-file)
3229 (let ((nnmail-active-file-coding-system
3230 gnus-agent-file-coding-system))
3231 (gnus-write-active-file active-file active-hashtb)))))
3232 (gnus-message 4 "Regenerating Gnus agent files...done")
3235 (defun gnus-agent-go-online (&optional force)
3236 "Switch servers into online status."
3237 (interactive (list t))
3238 (dolist (server gnus-opened-servers)
3239 (when (eq (nth 1 server) 'offline)
3240 (if (if (eq force 'ask)
3242 (format "Switch %s:%s into online status? "
3243 (caar server) (cadar server)))
3245 (setcar (nthcdr 1 server) 'close)))))
3247 (defun gnus-agent-toggle-group-plugged (group)
3248 "Toggle the status of the server of the current group."
3249 (interactive (list (gnus-group-group-name)))
3250 (let* ((method (gnus-find-method-for-group group))
3251 (status (cadr (assoc method gnus-opened-servers))))
3252 (if (eq status 'offline)
3253 (gnus-server-set-status method 'closed)
3254 (gnus-close-server method)
3255 (gnus-server-set-status method 'offline))
3256 (message "Turn %s:%s from %s to %s." (car method) (cadr method)
3257 (if (eq status 'offline) 'offline 'online)
3258 (if (eq status 'offline) 'online 'offline))))
3260 (defun gnus-agent-group-covered-p (group)
3261 (member (gnus-group-method group)
3262 gnus-agent-covered-methods))
3264 (add-hook 'gnus-group-prepare-hook
3268 (when (listp gnus-agent-expire-days)
3271 (gnus-message 1 "WARNING: gnus-agent-expire-days no longer\
3272 supports being set to a list.")(sleep-for 3)
3273 (gnus-message 1 "Change your configuration to set it to an\
3274 integer.")(sleep-for 3)
3275 (gnus-message 1 "I am now setting group parameters on each\
3276 group to match the configuration that the list offered.")
3279 (let ((groups (gnus-group-listed-groups)))
3281 (let* ((group (pop groups))
3282 (days gnus-agent-expire-days)
3285 (when (eq 0 (string-match
3288 (throw 'found (cadar days)))
3292 (gnus-group-set-parameter group 'agent-days-until-old
3295 (let ((h gnus-group-prepare-hook))
3297 (let ((func (pop h)))
3298 (when (and (listp func)
3299 (eq (cadr (caddr func)) 'gnus-agent-do-once))
3300 (remove-hook 'gnus-group-prepare-hook func)
3303 (gnus-message 1 "I have finished setting group parameters on\
3304 each group. You may now customize your groups and/or topics to control the\
3307 (provide 'gnus-agent)
3309 ;;; gnus-agent.el ends here