1997-04-16 22:13:18 +00:00
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;;; gnus-nocem.el --- NoCeM pseudo-cancellation treatment
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2000-09-19 13:37:09 +00:00
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2005-08-06 19:51:42 +00:00
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;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004,
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;; 2005 Free Software Foundation, Inc.
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1997-04-16 22:13:18 +00:00
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1999-02-20 14:05:57 +00:00
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;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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1997-04-16 22:13:18 +00:00
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;; Keywords: news
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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2005-07-04 17:55:18 +00:00
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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1997-04-16 22:13:18 +00:00
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;;; Commentary:
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;;; Code:
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1997-08-26 06:38:09 +00:00
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(eval-when-compile (require 'cl))
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1997-04-16 22:13:18 +00:00
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(require 'gnus)
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(require 'nnmail)
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(require 'gnus-art)
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(require 'gnus-sum)
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(require 'gnus-range)
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(defgroup gnus-nocem nil
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2005-07-04 00:53:31 +00:00
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"NoCeM pseudo-cancellation treatment."
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1997-04-16 22:13:18 +00:00
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:group 'gnus-score)
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(defcustom gnus-nocem-groups
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'("news.lists.filters" "news.admin.net-abuse.bulletins"
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"alt.nocem.misc" "news.admin.net-abuse.announce")
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1999-02-20 14:05:57 +00:00
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"*List of groups that will be searched for NoCeM messages."
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1997-04-16 22:13:18 +00:00
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:group 'gnus-nocem
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:type '(repeat (string :tag "Group")))
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(defcustom gnus-nocem-issuers
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2000-10-18 16:50:53 +00:00
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'("AutoMoose-1" ; CancelMoose[tm]
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"clewis@ferret.ocunix" ; Chris Lewis
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"cosmo.roadkill"
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"SpamHippo"
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"hweede@snafu.de")
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1999-02-20 14:05:57 +00:00
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"*List of NoCeM issuers to pay attention to.
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2000-10-18 16:50:53 +00:00
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This can also be a list of `(ISSUER CONDITION ...)' elements.
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See <URL:http://www.xs4all.nl/~rosalind/nocemreg/nocemreg.html> for an
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issuer registry."
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1997-04-16 22:13:18 +00:00
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:group 'gnus-nocem
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2004-09-04 13:13:48 +00:00
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:link '(url-link "http://www.xs4all.nl/~rosalind/nocemreg/nocemreg.html")
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1999-02-20 14:05:57 +00:00
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:type '(repeat (choice string sexp)))
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1997-04-16 22:13:18 +00:00
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(defcustom gnus-nocem-directory
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(nnheader-concat gnus-article-save-directory "NoCeM/")
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"*Directory where NoCeM files will be stored."
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:group 'gnus-nocem
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:type 'directory)
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(defcustom gnus-nocem-expiry-wait 15
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"*Number of days to keep NoCeM headers in the cache."
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:group 'gnus-nocem
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:type 'integer)
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2005-06-30 00:27:41 +00:00
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(defcustom gnus-nocem-verifyer 'pgg-verify
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1997-04-16 22:13:18 +00:00
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"*Function called to verify that the NoCeM message is valid.
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2005-06-30 00:27:41 +00:00
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One likely value is `pgg-verify'. If the function in this variable
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1997-04-16 22:13:18 +00:00
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isn't bound, the message will be used unconditionally."
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:group 'gnus-nocem
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2005-06-30 00:27:41 +00:00
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:type '(radio (function-item pgg-verify)
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(function-item mc-verify)
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1997-04-16 22:13:18 +00:00
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(function :tag "other")))
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(defcustom gnus-nocem-liberal-fetch nil
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"*If t try to fetch all messages which have @@NCM in the subject.
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Otherwise don't fetch messages which have references or whose message-id
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2002-10-18 08:36:59 +00:00
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matches a previously scanned and verified nocem message."
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1997-04-16 22:13:18 +00:00
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:group 'gnus-nocem
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:type 'boolean)
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2000-11-03 16:04:08 +00:00
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(defcustom gnus-nocem-check-article-limit 500
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2000-10-18 01:54:57 +00:00
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"*If non-nil, the maximum number of articles to check in any NoCeM group."
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:group 'gnus-nocem
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2000-10-18 16:50:53 +00:00
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:version "21.1"
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2000-10-18 01:54:57 +00:00
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:type '(choice (const :tag "unlimited" nil)
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(integer 1000)))
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2000-10-18 16:50:53 +00:00
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(defcustom gnus-nocem-check-from t
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"Non-nil means check for valid issuers in message bodies.
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Otherwise don't bother fetching articles unless their author matches a
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valid issuer, which is much faster if you are selective about the issuers."
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:group 'gnus-nocem
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:version "21.1"
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:type 'boolean)
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1997-04-16 22:13:18 +00:00
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;;; Internal variables
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(defvar gnus-nocem-active nil)
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(defvar gnus-nocem-alist nil)
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(defvar gnus-nocem-touched-alist nil)
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(defvar gnus-nocem-hashtb nil)
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(defvar gnus-nocem-seen-message-ids nil)
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;;; Functions
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(defun gnus-nocem-active-file ()
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(concat (file-name-as-directory gnus-nocem-directory) "active"))
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(defun gnus-nocem-cache-file ()
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(concat (file-name-as-directory gnus-nocem-directory) "cache"))
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1997-09-24 01:50:24 +00:00
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;;
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;; faster lookups for group names:
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;;
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(defvar gnus-nocem-real-group-hashtb nil
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"Real-name mappings of subscribed groups.")
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(defun gnus-fill-real-hashtb ()
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1999-02-20 14:05:57 +00:00
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"Fill up a hash table with the real-name mappings from the user's active file."
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1997-09-24 01:50:24 +00:00
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(setq gnus-nocem-real-group-hashtb (gnus-make-hashtable
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(length gnus-newsrc-alist)))
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(mapcar (lambda (group)
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(setq group (gnus-group-real-name (car group)))
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(gnus-sethash group t gnus-nocem-real-group-hashtb))
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gnus-newsrc-alist))
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1997-04-16 22:13:18 +00:00
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(defun gnus-nocem-scan-groups ()
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"Scan all NoCeM groups for new NoCeM messages."
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(interactive)
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(let ((groups gnus-nocem-groups)
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(gnus-inhibit-demon t)
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2000-09-19 13:37:09 +00:00
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group active gactive articles check-headers)
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1997-04-16 22:13:18 +00:00
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(gnus-make-directory gnus-nocem-directory)
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;; Load any previous NoCeM headers.
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(gnus-nocem-load-cache)
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1997-09-24 01:50:24 +00:00
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;; Get the group name mappings:
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(gnus-fill-real-hashtb)
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1997-04-16 22:13:18 +00:00
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;; Read the active file if it hasn't been read yet.
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(and (file-exists-p (gnus-nocem-active-file))
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(not gnus-nocem-active)
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(ignore-errors
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(load (gnus-nocem-active-file) t t t)))
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;; Go through all groups and see whether new articles have
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;; arrived.
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(while (setq group (pop groups))
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(if (not (setq gactive (gnus-activate-group group)))
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() ; This group doesn't exist.
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(setq active (nth 1 (assoc group gnus-nocem-active)))
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(when (and (not (< (cdr gactive) (car gactive))) ; Empty group.
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(or (not active)
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(< (cdr active) (cdr gactive))))
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;; Ok, there are new articles in this group, se we fetch the
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;; headers.
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(save-excursion
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(let ((dependencies (make-vector 10 nil))
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headers header)
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2000-09-19 13:37:09 +00:00
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(with-temp-buffer
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1997-04-16 22:13:18 +00:00
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(setq headers
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(if (eq 'nov
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(gnus-retrieve-headers
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(setq articles
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(gnus-uncompress-range
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(cons
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(if active (1+ (cdr active))
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(car gactive))
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(cdr gactive))))
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group))
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(gnus-get-newsgroup-headers-xover
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articles nil dependencies)
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(gnus-get-newsgroup-headers dependencies)))
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(while (setq header (pop headers))
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;; We take a closer look on all articles that have
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;; "@@NCM" in the subject. Unless we already read
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;; this cross posted message. Nocem messages
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;; are not allowed to have references, so we can
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;; ignore scanning followups.
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(and (string-match "@@NCM" (mail-header-subject header))
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2000-10-18 16:50:53 +00:00
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(and gnus-nocem-check-from
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(let ((case-fold-search t))
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(catch 'ok
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(mapcar
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(lambda (author)
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(if (consp author)
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(setq author (car author)))
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(if (string-match
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author (mail-header-from header))
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(throw 'ok t)))
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gnus-nocem-issuers)
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nil)))
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1997-04-16 22:13:18 +00:00
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(or gnus-nocem-liberal-fetch
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(and (or (string= "" (mail-header-references
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header))
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(null (mail-header-references header)))
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(not (member (mail-header-message-id header)
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gnus-nocem-seen-message-ids))))
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2000-09-19 13:37:09 +00:00
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(push header check-headers)))
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2000-10-18 01:54:57 +00:00
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(let* ((i 0)
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(check-headers
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(last check-headers gnus-nocem-check-article-limit))
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(len (length check-headers)))
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2000-09-19 13:37:09 +00:00
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(dolist (h check-headers)
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(gnus-message
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7 "Checking article %d in %s for NoCeM (%d of %d)..."
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(mail-header-number h) group (incf i) len)
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(gnus-nocem-check-article group h)))))))
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1997-04-16 22:13:18 +00:00
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(setq gnus-nocem-active
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(cons (list group gactive)
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(delq (assoc group gnus-nocem-active)
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gnus-nocem-active)))))
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;; Save the results, if any.
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(gnus-nocem-save-cache)
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(gnus-nocem-save-active)))
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(defun gnus-nocem-check-article (group header)
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"Check whether the current article is an NCM article and that we want it."
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;; Get the article.
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(let ((date (mail-header-date header))
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2000-10-18 16:50:53 +00:00
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(gnus-newsgroup-name group)
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1999-02-20 14:05:57 +00:00
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issuer b e type)
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1997-04-16 22:13:18 +00:00
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(when (or (not date)
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2000-09-19 13:37:09 +00:00
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(time-less-p
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(time-since (date-to-time date))
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(days-to-time gnus-nocem-expiry-wait)))
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1997-04-16 22:13:18 +00:00
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(gnus-request-article-this-buffer (mail-header-number header) group)
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(goto-char (point-min))
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(when (re-search-forward "-----BEGIN PGP MESSAGE-----" nil t)
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(delete-region (point-min) (match-beginning 0)))
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(when (re-search-forward "-----END PGP MESSAGE-----\n?" nil t)
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(delete-region (match-end 0) (point-max)))
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(goto-char (point-min))
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;; The article has to have proper NoCeM headers.
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(when (and (setq b (search-forward "\n@@BEGIN NCM HEADERS\n" nil t))
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(setq e (search-forward "\n@@BEGIN NCM BODY\n" nil t)))
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;; We get the name of the issuer.
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(narrow-to-region b e)
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1999-02-20 14:05:57 +00:00
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(setq issuer (mail-fetch-field "issuer")
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2005-06-30 00:27:41 +00:00
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type (mail-fetch-field "type"))
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1997-04-16 22:13:18 +00:00
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(widen)
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1999-02-20 14:05:57 +00:00
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(if (not (gnus-nocem-message-wanted-p issuer type))
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(message "invalid NoCeM issuer: %s" issuer)
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(and (gnus-nocem-verify-issuer issuer) ; She is who she says she is.
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(gnus-nocem-enter-article) ; We gobble the message.
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(push (mail-header-message-id header) ; But don't come back for
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gnus-nocem-seen-message-ids))))))) ; second helpings.
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(defun gnus-nocem-message-wanted-p (issuer type)
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(let ((issuers gnus-nocem-issuers)
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wanted conditions condition)
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(cond
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;; Do the quick check first.
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((member issuer issuers)
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t)
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((setq conditions (cdr (assoc issuer issuers)))
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;; Check whether we want this type.
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(while (setq condition (pop conditions))
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(cond
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((stringp condition)
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2005-06-30 00:27:41 +00:00
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(when (string-match condition type)
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(setq wanted t)))
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1999-02-20 14:05:57 +00:00
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((and (consp condition)
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(eq (car condition) 'not)
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(stringp (cadr condition)))
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2005-06-30 00:27:41 +00:00
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(when (string-match (cadr condition) type)
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(setq wanted nil)))
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1999-02-20 14:05:57 +00:00
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(t
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(error "Invalid NoCeM condition: %S" condition))))
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wanted))))
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1997-04-16 22:13:18 +00:00
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(defun gnus-nocem-verify-issuer (person)
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"Verify using PGP that the canceler is who she says she is."
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2005-06-30 00:27:41 +00:00
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(if (functionp gnus-nocem-verifyer)
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1997-09-24 01:50:24 +00:00
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(ignore-errors
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(funcall gnus-nocem-verifyer))
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1997-04-16 22:13:18 +00:00
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;; If we don't have Mailcrypt, then we use the message anyway.
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t))
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(defun gnus-nocem-enter-article ()
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"Enter the current article into the NoCeM cache."
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(goto-char (point-min))
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(let ((b (search-forward "\n@@BEGIN NCM BODY\n" nil t))
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(e (search-forward "\n@@END NCM BODY\n" nil t))
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(buf (current-buffer))
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ncm id group)
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(when (and b e)
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(narrow-to-region b (1+ (match-beginning 0)))
|
|
|
|
(goto-char (point-min))
|
|
|
|
(while (search-forward "\t" nil t)
|
|
|
|
(cond
|
|
|
|
((not (ignore-errors
|
2004-09-04 13:13:48 +00:00
|
|
|
(setq group (let ((obarray gnus-nocem-real-group-hashtb))
|
|
|
|
(read buf)))))
|
1997-04-16 22:13:18 +00:00
|
|
|
;; An error.
|
|
|
|
)
|
|
|
|
((not (symbolp group))
|
|
|
|
;; Ignore invalid entries.
|
|
|
|
)
|
|
|
|
((not (boundp group))
|
|
|
|
;; Make sure all entries in the hashtb are bound.
|
|
|
|
(set group nil))
|
|
|
|
(t
|
1997-09-24 01:50:24 +00:00
|
|
|
(when (gnus-gethash (gnus-group-real-name (symbol-name group))
|
|
|
|
gnus-nocem-real-group-hashtb)
|
1997-04-16 22:13:18 +00:00
|
|
|
;; Valid group.
|
|
|
|
(beginning-of-line)
|
2000-09-19 13:37:09 +00:00
|
|
|
(while (eq (char-after) ?\t)
|
1997-04-16 22:13:18 +00:00
|
|
|
(forward-line -1))
|
|
|
|
(setq id (buffer-substring (point) (1- (search-forward "\t"))))
|
2005-06-30 00:27:41 +00:00
|
|
|
(unless (if gnus-nocem-hashtb
|
|
|
|
(gnus-gethash id gnus-nocem-hashtb)
|
|
|
|
(setq gnus-nocem-hashtb (gnus-make-hashtable))
|
|
|
|
nil)
|
1997-04-16 22:13:18 +00:00
|
|
|
;; only store if not already present
|
|
|
|
(gnus-sethash id t gnus-nocem-hashtb)
|
|
|
|
(push id ncm))
|
|
|
|
(forward-line 1)
|
2000-09-19 13:37:09 +00:00
|
|
|
(while (eq (char-after) ?\t)
|
1997-04-16 22:13:18 +00:00
|
|
|
(forward-line 1))))))
|
|
|
|
(when ncm
|
|
|
|
(setq gnus-nocem-touched-alist t)
|
|
|
|
(push (cons (let ((time (current-time))) (setcdr (cdr time) nil) time)
|
|
|
|
ncm)
|
|
|
|
gnus-nocem-alist))
|
|
|
|
t)))
|
|
|
|
|
|
|
|
(defun gnus-nocem-load-cache ()
|
|
|
|
"Load the NoCeM cache."
|
|
|
|
(interactive)
|
|
|
|
(unless gnus-nocem-alist
|
|
|
|
;; The buffer doesn't exist, so we create it and load the NoCeM
|
|
|
|
;; cache.
|
|
|
|
(when (file-exists-p (gnus-nocem-cache-file))
|
|
|
|
(load (gnus-nocem-cache-file) t t t)
|
|
|
|
(gnus-nocem-alist-to-hashtb))))
|
|
|
|
|
|
|
|
(defun gnus-nocem-save-cache ()
|
|
|
|
"Save the NoCeM cache."
|
|
|
|
(when (and gnus-nocem-alist
|
|
|
|
gnus-nocem-touched-alist)
|
2000-09-19 13:37:09 +00:00
|
|
|
(with-temp-file (gnus-nocem-cache-file)
|
1997-04-16 22:13:18 +00:00
|
|
|
(gnus-prin1 `(setq gnus-nocem-alist ',gnus-nocem-alist)))
|
|
|
|
(setq gnus-nocem-touched-alist nil)))
|
|
|
|
|
|
|
|
(defun gnus-nocem-save-active ()
|
|
|
|
"Save the NoCeM active file."
|
2000-09-19 13:37:09 +00:00
|
|
|
(with-temp-file (gnus-nocem-active-file)
|
1997-04-16 22:13:18 +00:00
|
|
|
(gnus-prin1 `(setq gnus-nocem-active ',gnus-nocem-active))))
|
|
|
|
|
|
|
|
(defun gnus-nocem-alist-to-hashtb ()
|
|
|
|
"Create a hashtable from the Message-IDs we have."
|
|
|
|
(let* ((alist gnus-nocem-alist)
|
|
|
|
(pprev (cons nil alist))
|
|
|
|
(prev pprev)
|
2000-09-19 13:37:09 +00:00
|
|
|
(expiry (days-to-time gnus-nocem-expiry-wait))
|
1997-04-16 22:13:18 +00:00
|
|
|
entry)
|
|
|
|
(setq gnus-nocem-hashtb (gnus-make-hashtable (* (length alist) 51)))
|
|
|
|
(while (setq entry (car alist))
|
2000-09-19 13:37:09 +00:00
|
|
|
(if (not (time-less-p (time-since (car entry)) expiry))
|
1997-04-16 22:13:18 +00:00
|
|
|
;; This entry has expired, so we remove it.
|
|
|
|
(setcdr prev (cdr alist))
|
|
|
|
(setq prev alist)
|
|
|
|
;; This is ok, so we enter it into the hashtable.
|
|
|
|
(setq entry (cdr entry))
|
|
|
|
(while entry
|
|
|
|
(gnus-sethash (car entry) t gnus-nocem-hashtb)
|
|
|
|
(setq entry (cdr entry))))
|
|
|
|
(setq alist (cdr alist)))))
|
|
|
|
|
|
|
|
(gnus-add-shutdown 'gnus-nocem-close 'gnus)
|
|
|
|
|
|
|
|
(defun gnus-nocem-close ()
|
|
|
|
"Clear internal NoCeM variables."
|
|
|
|
(setq gnus-nocem-alist nil
|
|
|
|
gnus-nocem-hashtb nil
|
|
|
|
gnus-nocem-active nil
|
|
|
|
gnus-nocem-touched-alist nil
|
1997-09-24 01:50:24 +00:00
|
|
|
gnus-nocem-seen-message-ids nil
|
|
|
|
gnus-nocem-real-group-hashtb nil))
|
1997-04-16 22:13:18 +00:00
|
|
|
|
|
|
|
(defun gnus-nocem-unwanted-article-p (id)
|
|
|
|
"Say whether article ID in the current group is wanted."
|
1999-02-20 14:05:57 +00:00
|
|
|
(and gnus-nocem-hashtb
|
|
|
|
(gnus-gethash id gnus-nocem-hashtb)))
|
1997-04-16 22:13:18 +00:00
|
|
|
|
|
|
|
(provide 'gnus-nocem)
|
|
|
|
|
2003-09-01 15:45:59 +00:00
|
|
|
;;; arch-tag: 0e0c74ea-2f8e-4f3e-8fff-09f767c1adef
|
1997-04-16 22:13:18 +00:00
|
|
|
;;; gnus-nocem.el ends here
|