1 ;;; gnus-registry.el --- article registry for Gnus
3 ;; Copyright (C) 2002-2012 Free Software Foundation, Inc.
5 ;; Author: Ted Zlatanov <tzz@lifelogs.com>
6 ;; Keywords: news registry
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
25 ;; This is the gnus-registry.el package, which works with all
26 ;; Gnus backends, not just nnmail. The major issue is that it
27 ;; doesn't go across backends, so for instance if an article is in
28 ;; nnml:sys and you see a reference to it in nnimap splitting, the
29 ;; article will end up in nnimap:sys
31 ;; gnus-registry.el intercepts article respooling, moving, deleting,
32 ;; and copying for all backends. If it doesn't work correctly for
33 ;; you, submit a bug report and I'll be glad to fix it. It needs
34 ;; better documentation in the manual (also on my to-do list).
36 ;; If you want to track recipients (and you should to make the
37 ;; gnus-registry splitting work better), you need the To and Cc
38 ;; headers collected by Gnus. Note that in more recent Gnus versions
39 ;; this is already the case: look at `gnus-extra-headers' to be sure.
41 ;; ;;; you may also want Gcc Newsgroups Keywords X-Face
42 ;; (add-to-list 'gnus-extra-headers 'To)
43 ;; (add-to-list 'gnus-extra-headers 'Cc)
44 ;; (setq nnmail-extra-headers gnus-extra-headers)
46 ;; Put this in your startup file (~/.gnus.el for instance) or use Customize:
48 ;; (setq gnus-registry-max-entries 2500
49 ;; gnus-registry-track-extra '(sender subject recipient))
51 ;; (gnus-registry-initialize)
53 ;; Then use this in your fancy-split:
55 ;; (: gnus-registry-split-fancy-with-parent)
57 ;; You should also consider using the nnregistry backend to look up
58 ;; articles. See the Gnus manual for more information.
60 ;; Finally, you can put %uM in your summary line format to show the
61 ;; registry marks if you do this:
63 ;; show the marks as single characters (see the :char property in
64 ;; `gnus-registry-marks'):
65 ;; (defalias 'gnus-user-format-function-M 'gnus-registry-article-marks-to-chars)
67 ;; show the marks by name (see `gnus-registry-marks'):
68 ;; (defalias 'gnus-user-format-function-M 'gnus-registry-article-marks-to-names)
72 ;; - get the correct group on spool actions
74 ;; - articles that are spooled to a different backend should be moved
79 (eval-when-compile (require 'cl))
90 (defvar gnus-adaptive-word-syntax-table)
92 (defvar gnus-registry-dirty t
93 "Boolean set to t when the registry is modified")
95 (defgroup gnus-registry nil
100 (defvar gnus-registry-marks
103 :image "summary_important")
106 :image "summary_work")
109 :image "summary_personal")
112 :image "summary_todo")
115 :image "summary_later"))
117 "List of registry marks and their options.
119 `gnus-registry-mark-article' will offer symbols from this list
122 Each entry must have a character to be useful for summary mode
123 line display and for keyboard shortcuts.
125 Each entry must have an image string to be useful for visual
128 (defcustom gnus-registry-default-mark 'To-Do
129 "The default mark. Should be a valid key for `gnus-registry-marks'."
130 :group 'gnus-registry
133 (defcustom gnus-registry-unfollowed-addresses
134 (list (regexp-quote user-mail-address))
135 "List of addresses that gnus-registry-split-fancy-with-parent won't trace.
136 The addresses are matched, they don't have to be fully qualified.
137 In the messages, these addresses can be the sender or the
140 :group 'gnus-registry
141 :type '(repeat regexp))
143 (defcustom gnus-registry-unfollowed-groups
144 '("delayed$" "drafts$" "queue$" "INBOX$" "^nnmairix:" "archive")
145 "List of groups that gnus-registry-split-fancy-with-parent won't return.
146 The group names are matched, they don't have to be fully
147 qualified. This parameter tells the Gnus registry 'never split a
148 message into a group that matches one of these, regardless of
151 nnmairix groups are specifically excluded because they are ephemeral."
152 :group 'gnus-registry
153 :type '(repeat regexp))
155 (defcustom gnus-registry-install 'ask
156 "Whether the registry should be installed."
157 :group 'gnus-registry
158 :type '(choice (const :tag "Never Install" nil)
159 (const :tag "Always Install" t)
160 (const :tag "Ask Me" ask)))
162 (defvar gnus-registry-enabled nil)
164 (defvar gnus-summary-misc-menu) ;; Avoid byte compiler warning.
166 (defvar gnus-registry-misc-menus nil) ; ugly way to keep the menus
168 (make-obsolete-variable 'gnus-registry-clean-empty nil "23.4")
169 (make-obsolete-variable 'gnus-registry-use-long-group-names nil "23.4")
170 (make-obsolete-variable 'gnus-registry-max-track-groups nil "23.4")
171 (make-obsolete-variable 'gnus-registry-entry-caching nil "23.4")
172 (make-obsolete-variable 'gnus-registry-trim-articles-without-groups nil "23.4")
174 (defcustom gnus-registry-track-extra '(subject sender recipient)
175 "Whether the registry should track extra data about a message.
176 The subject, recipients (To: and Cc:), and Sender (From:) headers
177 are tracked this way by default."
178 :group 'gnus-registry
180 '(set :tag "Tracking choices"
181 (const :tag "Track by subject (Subject: header)" subject)
182 (const :tag "Track by recipient (To: and Cc: headers)" recipient)
183 (const :tag "Track by sender (From: header)" sender)))
185 (defcustom gnus-registry-split-strategy nil
186 "The splitting strategy applied to the keys in `gnus-registry-track-extra'.
188 Given a set of unique found groups G and counts for each element
189 of G, and a key K (typically 'sender or 'subject):
191 When nil, if G has only one element, use it. Otherwise give up.
192 This is the fastest but also least useful strategy.
194 When 'majority, use the majority by count. So if there is a
195 group with the most articles counted by K, use that. Ties are
196 resolved in no particular order, simply the first one found wins.
197 This is the slowest strategy but also the most accurate one.
199 When 'first, the first element of G wins. This is fast and
200 should be OK if your senders and subjects don't \"bleed\" across
202 :group 'gnus-registry
204 '(choice :tag "Splitting strategy"
205 (const :tag "Only use single choices, discard multiple matches" nil)
206 (const :tag "Majority of matches wins" majority)
207 (const :tag "First found wins" first)))
209 (defcustom gnus-registry-minimum-subject-length 5
210 "The minimum length of a subject before it's considered trackable."
211 :group 'gnus-registry
214 (defcustom gnus-registry-extra-entries-precious '(mark)
215 "What extra keys are precious, meaning entries with them won't get pruned.
216 By default, 'mark is included, so articles with marks are
219 Before you save the Gnus registry, it's pruned. Any entries with
220 keys in this list will not be pruned. All other entries go to
222 :group 'gnus-registry
223 :type '(repeat symbol))
225 (defcustom gnus-registry-cache-file
227 (or gnus-dribble-directory gnus-home-directory "~/")
228 ".gnus.registry.eioio")
229 "File where the Gnus registry will be stored."
230 :group 'gnus-registry
233 (defcustom gnus-registry-max-entries nil
234 "Maximum number of entries in the registry, nil for unlimited."
235 :group 'gnus-registry
236 :type '(radio (const :format "Unlimited " nil)
237 (integer :format "Maximum number: %v")))
239 (defcustom gnus-registry-max-pruned-entries nil
240 "Maximum number of pruned entries in the registry, nil for unlimited."
242 :group 'gnus-registry
243 :type '(radio (const :format "Unlimited " nil)
244 (integer :format "Maximum number: %v")))
246 (defun gnus-registry-fixup-registry (db)
248 (let ((old (oref db :tracked)))
250 (append gnus-registry-extra-entries-precious
253 (or gnus-registry-max-entries
254 most-positive-fixnum))
255 (oset db :prune-factor
258 (or gnus-registry-max-pruned-entries
259 most-positive-fixnum))
261 (append gnus-registry-track-extra
262 '(mark group keyword)))
263 (when (not (equal old (oref db :tracked)))
264 (gnus-message 9 "Reindexing the Gnus registry (tracked change)")
265 (registry-reindex db))))
268 (defun gnus-registry-make-db (&optional file)
269 (interactive "fGnus registry persistence file: \n")
270 (gnus-registry-fixup-registry
273 :file (or file gnus-registry-cache-file)
274 ;; these parameters are set in `gnus-registry-fixup-registry'
275 :max-hard most-positive-fixnum
276 :max-soft most-positive-fixnum
280 (defvar gnus-registry-db (gnus-registry-make-db)
281 "*The article registry by Message ID. See `registry-db'")
283 ;; top-level registry data management
284 (defun gnus-registry-remake-db (&optional forsure)
285 "Remake the registry database after customization.
286 This is not required after changing `gnus-registry-cache-file'."
287 (interactive (list (y-or-n-p "Remake and CLEAR the Gnus registry? ")))
289 (gnus-message 4 "Remaking the Gnus registry")
290 (setq gnus-registry-db (gnus-registry-make-db))))
292 (defun gnus-registry-read ()
293 "Read the registry cache file."
295 (let ((file gnus-registry-cache-file))
298 (gnus-message 5 "Reading Gnus registry from %s..." file)
299 (setq gnus-registry-db (gnus-registry-fixup-registry
300 (eieio-persistent-read file)))
301 (gnus-message 5 "Reading Gnus registry from %s...done" file))
305 "The Gnus registry could not be loaded from %s, creating a new one"
307 (gnus-registry-remake-db t)))))
309 (defun gnus-registry-save (&optional file db)
310 "Save the registry cache file."
312 (let ((file (or file gnus-registry-cache-file))
313 (db (or db gnus-registry-db)))
314 (gnus-message 5 "Saving Gnus registry (%d entries) to %s..."
315 (registry-size db) file)
317 ;; TODO: call (gnus-string-remove-all-properties v) on all elements?
318 (eieio-persistent-save db file)
319 (gnus-message 5 "Saving Gnus registry (size %d) to %s...done"
320 (registry-size db) file)))
322 (defun gnus-registry-remove-ignored ()
324 (let* ((db gnus-registry-db)
325 (grouphashtb (registry-lookup-secondary db 'group))
326 (old-size (registry-size db)))
327 (registry-reindex db)
328 (loop for k being the hash-keys of grouphashtb
329 using (hash-values v)
330 when (gnus-registry-ignore-group-p k)
331 do (registry-delete db v nil))
332 (registry-reindex db)
333 (gnus-message 4 "Removed %d ignored entries from the Gnus registry"
334 (- old-size (registry-size db)))))
336 ;; article move/copy/spool/delete actions
337 (defun gnus-registry-action (action data-header from &optional to method)
338 (let* ((id (mail-header-id data-header))
339 (subject (mail-header-subject data-header))
340 (extra (mail-header-extra data-header))
341 (recipients (gnus-registry-sort-addresses
342 (or (cdr-safe (assq 'Cc extra)) "")
343 (or (cdr-safe (assq 'To extra)) "")))
344 (sender (nth 0 (gnus-registry-extract-addresses
345 (mail-header-from data-header))))
346 (from (gnus-group-guess-full-name-from-command-method from))
347 (to (if to (gnus-group-guess-full-name-from-command-method to) nil))
348 (to-name (if to to "the Bit Bucket")))
349 (gnus-message 7 "Gnus registry: article %s %s from %s to %s"
350 id (if method "respooling" "going") from to)
352 (gnus-registry-handle-action
354 ;; unless copying, remove the old "from" group
355 (if (not (equal 'copy action)) from nil)
356 to subject sender recipients)))
358 (defun gnus-registry-spool-action (id group &optional subject sender recipients)
359 (let ((to (gnus-group-guess-full-name-from-command-method group))
360 (recipients (or recipients
361 (gnus-registry-sort-addresses
362 (or (message-fetch-field "cc") "")
363 (or (message-fetch-field "to") ""))))
364 (subject (or subject (message-fetch-field "subject")))
365 (sender (or sender (message-fetch-field "from"))))
366 (when (and (stringp id) (string-match "\r$" id))
367 (setq id (substring id 0 -1)))
368 (gnus-message 7 "Gnus registry: article %s spooled to %s"
371 (gnus-registry-handle-action id nil to subject sender recipients)))
373 (defun gnus-registry-handle-action (id from to subject sender
374 &optional recipients)
377 "gnus-registry-handle-action %S" (list id from to subject sender recipients))
378 (let ((db gnus-registry-db)
379 ;; if the group is ignored, set the destination to nil (same as delete)
380 (to (if (gnus-registry-ignore-group-p to) nil to))
382 (entry (gnus-registry-get-or-make-entry id))
383 (subject (gnus-string-remove-all-properties
384 (gnus-registry-simplify-subject subject)))
385 (sender (gnus-string-remove-all-properties sender)))
387 ;; this could be done by calling `gnus-registry-set-id-key'
388 ;; several times but it's better to bunch the transactions
391 (registry-delete db (list id) nil)
393 (setq entry (cons (delete from (assoc 'group entry))
394 (assq-delete-all 'group entry))))
396 (dolist (kv `((group ,to)
398 (recipient ,@recipients)
401 (let ((new (or (assq (first kv) entry)
403 (dolist (toadd (cdr kv))
404 (add-to-list 'new toadd t))
405 (setq entry (cons new
406 (assq-delete-all (first kv) entry))))))
407 (gnus-message 10 "Gnus registry: new entry for %s is %S"
410 (gnus-registry-insert db id entry)))
412 ;; Function for nn{mail|imap}-split-fancy: look up all references in
413 ;; the cache and if a match is found, return that group.
414 (defun gnus-registry-split-fancy-with-parent ()
415 "Split this message into the same group as its parent. The parent
416 is obtained from the registry. This function can be used as an entry
417 in `nnmail-split-fancy' or `nnimap-split-fancy', for example like
418 this: (: gnus-registry-split-fancy-with-parent)
420 This function tracks ALL backends, unlike
421 `nnmail-split-fancy-with-parent' which tracks only nnmail
424 For a message to be split, it looks for the parent message in the
425 References or In-Reply-To header and then looks in the registry
426 to see which group that message was put in. This group is
427 returned, unless `gnus-registry-follow-group-p' return nil for
430 See the Info node `(gnus)Fancy Mail Splitting' for more details."
431 (let* ((refstr (or (message-fetch-field "references") "")) ; guaranteed
432 (reply-to (message-fetch-field "in-reply-to")) ; may be nil
433 ;; now, if reply-to is valid, append it to the References
435 (concat refstr " " reply-to)
437 (references (and refstr (gnus-extract-references refstr)))
438 ;; these may not be used, but the code is cleaner having them up here
439 (sender (gnus-string-remove-all-properties
440 (message-fetch-field "from")))