1 ;;; gnus-registry.el --- article registry for Gnus
2 ;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 ;; Free Software Foundation, Inc.
5 ;; Author: Ted Zlatanov <tzz@lifelogs.com>
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 2, or (at your option)
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; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
29 (eval-when-compile (require 'cl))
36 (defgroup gnus-registry nil
40 (defvar gnus-registry-hashtb nil
41 "*The article registry by Message ID.")
43 (defvar gnus-registry-headers-hashtb nil
44 "*The article header registry by Message ID. Unused for now.")
46 (defcustom gnus-registry-unfollowed-groups '("delayed" "drafts" "queue")
47 "List of groups that gnus-registry-split-fancy-with-parent won't follow.
48 The group names are matched, they don't have to be fully qualified."
50 :type '(repeat string))
52 ;; Function(s) missing in Emacs 20
53 (when (memq nil (mapcar 'fboundp '(puthash)))
55 (unless (fboundp 'puthash)
56 ;; alias puthash is missing from Emacs 20 cl-extra.el
57 (defalias 'puthash 'cl-puthash)))
59 (defun gnus-registry-translate-to-alist ()
60 (setq gnus-registry-alist (hashtable-to-alist gnus-registry-hashtb)))
62 (defun gnus-registry-translate-from-alist ()
63 (setq gnus-registry-hashtb (alist-to-hashtable gnus-registry-alist)))
65 (defun alist-to-hashtable (alist)
66 "Build a hashtable from the values in ALIST."
67 (let ((ht (make-hash-table
72 (puthash (car kv-pair) (cdr kv-pair) ht))
76 (defun hashtable-to-alist (hash)
77 "Build an alist from the values in HASH."
81 (setq list (cons (cons key value) list)))
85 (defun gnus-register-action (action data-header from &optional to method)
86 (let* ((id (mail-header-id data-header))
87 (from (gnus-group-guess-full-name from))
88 (to (if to (gnus-group-guess-full-name to) nil))
89 (to-name (if to to "the Bit Bucket"))
90 (old-entry (gethash id gnus-registry-hashtb)))
91 (gnus-message 5 "Registry: article %s %s from %s to %s"
93 (if method "respooling" "going")
98 ((equal 'delete action) (gnus-registry-delete-group id from))
99 (t (gnus-registry-add-group id to)))))
101 (defun gnus-register-spool-action (id group)
102 ;; do not process the draft IDs
103 ; (unless (string-match "totally-fudged-out-message-id" id)
104 ; (let ((group (gnus-group-guess-full-name group)))
105 (when (string-match "\r$" id)
106 (setq id (substring id 0 -1)))
107 (gnus-message 5 "Registry: article %s spooled to %s"
110 (gnus-registry-add-group id group))
113 ;; Function for nn{mail|imap}-split-fancy: look up all references in
114 ;; the cache and if a match is found, return that group.
115 (defun gnus-registry-split-fancy-with-parent ()
116 "Split this message into the same group as its parent. The parent
117 is obtained from the registry. This function can be used as an entry
118 in `nnmail-split-fancy' or `nnimap-split-fancy', for example like
119 this: (: gnus-registry-split-fancy-with-parent)
121 For a message to be split, it looks for the parent message in the
122 References or In-Reply-To header and then looks in the registry to
123 see which group that message was put in. This group is returned.
125 See the Info node `(gnus)Fancy Mail Splitting' for more details."
126 (let ((refstr (or (message-fetch-field "references")
127 (message-fetch-field "in-reply-to")))
131 (setq references (nreverse (gnus-split-references refstr)))
133 (setq res (or (gnus-registry-fetch-group x) res))
134 (when (or (gnus-registry-grep-in-list
136 gnus-registry-unfollowed-groups)
137 (gnus-registry-grep-in-list
139 nnmail-split-fancy-with-parent-ignore-groups))
144 (defun gnus-registry-grep-in-list (word list)
149 (string-match x word))
152 (defun gnus-registry-fetch-group (id)
153 "Get the group of a message, based on the message ID.
154 Returns the first place where the trail finds a spool action."
155 (let ((trail (gethash id gnus-registry-hashtb)))
160 (defun gnus-registry-delete-group (id group)
161 "Get the group of a message, based on the message ID.
162 Returns the first place where the trail finds a spool action."
163 (let ((trail (gethash id gnus-registry-hashtb))
164 (group (gnus-group-short-name group)))
165 (puthash id (if trail
168 gnus-registry-hashtb))
169 ;; now, clear the entry if it's empty
170 (unless (gethash id gnus-registry-hashtb)
171 (remhash id gnus-registry-hashtb)))
173 (defun gnus-registry-add-group (id group)
174 "Get the group of a message, based on the message ID.
175 Returns the first place where the trail finds a spool action."
176 ;; make sure there are no duplicate entries
177 (let ((group (gnus-group-short-name group)))
178 (gnus-registry-delete-group id group)
179 (let ((trail (gethash id gnus-registry-hashtb)))
180 (puthash id (if trail
183 gnus-registry-hashtb))))
185 (defun gnus-registry-clear ()
186 "Clear the Gnus registry."
188 (setq gnus-registry-alist nil
189 gnus-registry-headers-alist nil)
190 (gnus-registry-translate-from-alist))
192 ; also does copy, respool, and crosspost
193 (add-hook 'gnus-summary-article-move-hook 'gnus-register-action)
194 (add-hook 'gnus-summary-article-delete-hook 'gnus-register-action)
195 (add-hook 'gnus-summary-article-expire-hook 'gnus-register-action)
196 (add-hook 'nnmail-spool-hook 'gnus-register-spool-action)
198 (add-hook 'gnus-save-newsrc-hook 'gnus-registry-translate-to-alist)
199 (add-hook 'gnus-read-newsrc-el-hook 'gnus-registry-translate-from-alist)
201 ;; TODO: a lot of things
203 (provide 'gnus-registry)
205 ;;; gnus-registry.el ends here