1
0
mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-11-23 07:19:15 +00:00
emacs/lisp/gnus/gnus-agent.el
2003-02-04 13:24:35 +00:00

1701 lines
56 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; gnus-agent.el --- unplugged support for Gnus
;; Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;; Code:
(require 'gnus)
(require 'gnus-cache)
(require 'nnvirtual)
(require 'gnus-sum)
(require 'gnus-score)
(eval-when-compile
(if (featurep 'xemacs)
(require 'itimer)
(require 'timer))
(require 'cl))
(defcustom gnus-agent-directory (nnheader-concat gnus-directory "agent/")
"Where the Gnus agent will store its files."
:group 'gnus-agent
:type 'directory)
(defcustom gnus-agent-plugged-hook nil
"Hook run when plugging into the network."
:group 'gnus-agent
:type 'hook)
(defcustom gnus-agent-unplugged-hook nil
"Hook run when unplugging from the network."
:group 'gnus-agent
:type 'hook)
(defcustom gnus-agent-handle-level gnus-level-subscribed
"Groups on levels higher than this variable will be ignored by the Agent."
:group 'gnus-agent
:type 'integer)
(defcustom gnus-agent-expire-days 7
"Read articles older than this will be expired."
:group 'gnus-agent
:type 'integer)
(defcustom gnus-agent-expire-all nil
"If non-nil, also expire unread, ticked and dormant articles.
If nil, only read articles will be expired."
:group 'gnus-agent
:type 'boolean)
(defcustom gnus-agent-group-mode-hook nil
"Hook run in Agent group minor modes."
:group 'gnus-agent
:type 'hook)
(defcustom gnus-agent-summary-mode-hook nil
"Hook run in Agent summary minor modes."
:group 'gnus-agent
:type 'hook)
(defcustom gnus-agent-server-mode-hook nil
"Hook run in Agent summary minor modes."
:group 'gnus-agent
:type 'hook)
(defcustom gnus-agent-confirmation-function 'y-or-n-p
"Function to confirm when error happens."
:version "21.1"
:group 'gnus-agent
:type 'function)
(defcustom gnus-agent-synchronize-flags 'ask
"Indicate if flags are synchronized when you plug in.
If this is `ask' the hook will query the user."
:version "21.1"
:type '(choice (const :tag "Always" t)
(const :tag "Never" nil)
(const :tag "Ask" ask))
:group 'gnus-agent)
;;; Internal variables
(defvar gnus-agent-history-buffers nil)
(defvar gnus-agent-buffer-alist nil)
(defvar gnus-agent-article-alist nil)
(defvar gnus-agent-group-alist nil)
(defvar gnus-agent-covered-methods nil)
(defvar gnus-category-alist nil)
(defvar gnus-agent-current-history nil)
(defvar gnus-agent-overview-buffer nil)
(defvar gnus-category-predicate-cache nil)
(defvar gnus-category-group-cache nil)
(defvar gnus-agent-spam-hashtb nil)
(defvar gnus-agent-file-name nil)
(defvar gnus-agent-send-mail-function nil)
(defvar gnus-agent-file-coding-system 'raw-text)
;; Dynamic variables
(defvar gnus-headers)
(defvar gnus-score)
;;;
;;; Setup
;;;
(defun gnus-open-agent ()
(setq gnus-agent t)
(gnus-agent-read-servers)
(gnus-category-read)
(gnus-agent-create-buffer)
(add-hook 'gnus-group-mode-hook 'gnus-agent-mode)
(add-hook 'gnus-summary-mode-hook 'gnus-agent-mode)
(add-hook 'gnus-server-mode-hook 'gnus-agent-mode))
(defun gnus-agent-create-buffer ()
(if (gnus-buffer-live-p gnus-agent-overview-buffer)
t
(setq gnus-agent-overview-buffer
(gnus-get-buffer-create " *Gnus agent overview*"))
(with-current-buffer gnus-agent-overview-buffer
(mm-enable-multibyte))
nil))
(gnus-add-shutdown 'gnus-close-agent 'gnus)
(defun gnus-close-agent ()
(setq gnus-agent-covered-methods nil
gnus-category-predicate-cache nil
gnus-category-group-cache nil
gnus-agent-spam-hashtb nil)
(gnus-kill-buffer gnus-agent-overview-buffer))
;;;
;;; Utility functions
;;;
(defun gnus-agent-read-file (file)
"Load FILE and do a `read' there."
(with-temp-buffer
(ignore-errors
(nnheader-insert-file-contents file)
(goto-char (point-min))
(read (current-buffer)))))
(defsubst gnus-agent-method ()
(concat (symbol-name (car gnus-command-method)) "/"
(if (equal (cadr gnus-command-method) "")
"unnamed"
(cadr gnus-command-method))))
(defsubst gnus-agent-directory ()
"The name of the Gnus agent directory."
(nnheader-concat gnus-agent-directory
(nnheader-translate-file-chars (gnus-agent-method)) "/"))
(defun gnus-agent-lib-file (file)
"The full name of the Gnus agent library FILE."
(expand-file-name file
(file-name-as-directory
(expand-file-name "agent.lib" (gnus-agent-directory)))))
;;; Fetching setup functions.
(defun gnus-agent-start-fetch ()
"Initialize data structures for efficient fetching."
(gnus-agent-open-history)
(setq gnus-agent-current-history (gnus-agent-history-buffer))
(gnus-agent-create-buffer))
(defun gnus-agent-stop-fetch ()
"Save all data structures and clean up."
(gnus-agent-save-history)
(gnus-agent-close-history)
(setq gnus-agent-spam-hashtb nil)
(save-excursion
(set-buffer nntp-server-buffer)
(widen)))
(defmacro gnus-agent-with-fetch (&rest forms)
"Do FORMS safely."
`(unwind-protect
(let ((gnus-agent-fetching t))
(gnus-agent-start-fetch)
,@forms)
(gnus-agent-stop-fetch)))
(put 'gnus-agent-with-fetch 'lisp-indent-function 0)
(put 'gnus-agent-with-fetch 'edebug-form-spec '(body))
;;;
;;; Mode infestation
;;;
(defvar gnus-agent-mode-hook nil
"Hook run when installing agent mode.")
(defvar gnus-agent-mode nil)
(defvar gnus-agent-mode-status '(gnus-agent-mode " Plugged"))
(defun gnus-agent-mode ()
"Minor mode for providing a agent support in Gnus buffers."
(let* ((buffer (progn (string-match "^gnus-\\(.*\\)-mode$"
(symbol-name major-mode))
(match-string 1 (symbol-name major-mode))))
(mode (intern (format "gnus-agent-%s-mode" buffer))))
(set (make-local-variable 'gnus-agent-mode) t)
(set mode nil)
(set (make-local-variable mode) t)
;; Set up the menu.
(when (gnus-visual-p 'agent-menu 'menu)
(funcall (intern (format "gnus-agent-%s-make-menu-bar" buffer))))
(unless (assq 'gnus-agent-mode minor-mode-alist)
(push gnus-agent-mode-status minor-mode-alist))
(unless (assq mode minor-mode-map-alist)
(push (cons mode (symbol-value (intern (format "gnus-agent-%s-mode-map"
buffer))))
minor-mode-map-alist))
(when (eq major-mode 'gnus-group-mode)
(gnus-agent-toggle-plugged gnus-plugged))
(gnus-run-hooks 'gnus-agent-mode-hook
(intern (format "gnus-agent-%s-mode-hook" buffer)))))
(defvar gnus-agent-group-mode-map (make-sparse-keymap))
(gnus-define-keys gnus-agent-group-mode-map
"Ju" gnus-agent-fetch-groups
"Jc" gnus-enter-category-buffer
"Jj" gnus-agent-toggle-plugged
"Js" gnus-agent-fetch-session
"JY" gnus-agent-synchronize-flags
"JS" gnus-group-send-drafts
"Ja" gnus-agent-add-group
"Jr" gnus-agent-remove-group)
(defun gnus-agent-group-make-menu-bar ()
(unless (boundp 'gnus-agent-group-menu)
(easy-menu-define
gnus-agent-group-menu gnus-agent-group-mode-map ""
'("Agent"
["Toggle plugged" gnus-agent-toggle-plugged t]
["List categories" gnus-enter-category-buffer t]
["Send drafts" gnus-group-send-drafts gnus-plugged]
("Fetch"
["All" gnus-agent-fetch-session gnus-plugged]
["Group" gnus-agent-fetch-group gnus-plugged])))))
(defvar gnus-agent-summary-mode-map (make-sparse-keymap))
(gnus-define-keys gnus-agent-summary-mode-map
"Jj" gnus-agent-toggle-plugged
"J#" gnus-agent-mark-article
"J\M-#" gnus-agent-unmark-article
"@" gnus-agent-toggle-mark
"Jc" gnus-agent-catchup)
(defun gnus-agent-summary-make-menu-bar ()
(unless (boundp 'gnus-agent-summary-menu)
(easy-menu-define
gnus-agent-summary-menu gnus-agent-summary-mode-map ""
'("Agent"
["Toggle plugged" gnus-agent-toggle-plugged t]
["Mark as downloadable" gnus-agent-mark-article t]
["Unmark as downloadable" gnus-agent-unmark-article t]
["Toggle mark" gnus-agent-toggle-mark t]
["Catchup undownloaded" gnus-agent-catchup t]))))
(defvar gnus-agent-server-mode-map (make-sparse-keymap))
(gnus-define-keys gnus-agent-server-mode-map
"Jj" gnus-agent-toggle-plugged
"Ja" gnus-agent-add-server
"Jr" gnus-agent-remove-server)
(defun gnus-agent-server-make-menu-bar ()
(unless (boundp 'gnus-agent-server-menu)
(easy-menu-define
gnus-agent-server-menu gnus-agent-server-mode-map ""
'("Agent"
["Toggle plugged" gnus-agent-toggle-plugged t]
["Add" gnus-agent-add-server t]
["Remove" gnus-agent-remove-server t]))))
(defun gnus-agent-toggle-plugged (plugged)
"Toggle whether Gnus is unplugged or not."
(interactive (list (not gnus-plugged)))
(if plugged
(progn
(setq gnus-plugged plugged)
(gnus-agent-possibly-synchronize-flags)
(gnus-run-hooks 'gnus-agent-plugged-hook)
(setcar (cdr gnus-agent-mode-status) " Plugged"))
(gnus-agent-close-connections)
(setq gnus-plugged plugged)
(gnus-run-hooks 'gnus-agent-unplugged-hook)
(setcar (cdr gnus-agent-mode-status) " Unplugged"))
(set-buffer-modified-p t))
(defun gnus-agent-close-connections ()
"Close all methods covered by the Gnus agent."
(let ((methods gnus-agent-covered-methods))
(while methods
(gnus-close-server (pop methods)))))
;;;###autoload
(defun gnus-unplugged ()
"Start Gnus unplugged."
(interactive)
(setq gnus-plugged nil)
(gnus))
;;;###autoload
(defun gnus-plugged ()
"Start Gnus plugged."
(interactive)
(setq gnus-plugged t)
(gnus))
;;;###autoload
(defun gnus-agentize ()
"Allow Gnus to be an offline newsreader.
The normal usage of this command is to put the following as the
last form in your `.gnus.el' file:
\(gnus-agentize)
This will modify the `gnus-before-startup-hook', `gnus-post-method',
and `message-send-mail-function' variables, and install the Gnus
agent minor mode in all Gnus buffers."
(interactive)
(gnus-open-agent)
(add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
(unless gnus-agent-send-mail-function
(setq gnus-agent-send-mail-function message-send-mail-function
message-send-mail-function 'gnus-agent-send-mail))
(unless gnus-agent-covered-methods
(setq gnus-agent-covered-methods (list gnus-select-method))))
(defun gnus-agent-queue-setup ()
"Make sure the queue group exists."
(unless (gnus-gethash "nndraft:queue" gnus-newsrc-hashtb)
(gnus-request-create-group "queue" '(nndraft ""))
(let ((gnus-level-default-subscribed 1))
(gnus-subscribe-group "nndraft:queue" nil '(nndraft "")))
(gnus-group-set-parameter
"nndraft:queue" 'gnus-dummy '((gnus-draft-mode)))))
(defun gnus-agent-send-mail ()
(if gnus-plugged
(funcall gnus-agent-send-mail-function)
(goto-char (point-min))
(re-search-forward
(concat "^" (regexp-quote mail-header-separator) "\n"))
(replace-match "\n")
(gnus-agent-insert-meta-information 'mail)
(gnus-request-accept-article "nndraft:queue" nil t t)))
(defun gnus-agent-insert-meta-information (type &optional method)
"Insert meta-information into the message that says how it's to be posted.
TYPE can be either `mail' or `news'. If the latter METHOD can
be a select method."
(save-excursion
(message-remove-header gnus-agent-meta-information-header)
(goto-char (point-min))
(insert gnus-agent-meta-information-header ": "
(symbol-name type) " " (format "%S" method)
"\n")
(forward-char -1)
(while (search-backward "\n" nil t)
(replace-match "\\n" t t))))
(defun gnus-agent-restore-gcc ()
"Restore GCC field from saved header."
(save-excursion
(goto-char (point-min))
(while (re-search-forward (concat gnus-agent-gcc-header ":") nil t)
(replace-match "Gcc:" 'fixedcase))))
(defun gnus-agent-any-covered-gcc ()
(save-restriction
(message-narrow-to-headers)
(let* ((gcc (mail-fetch-field "gcc" nil t))
(methods (and gcc
(mapcar 'gnus-inews-group-method
(message-unquote-tokens
(message-tokenize-header
gcc " ,")))))
covered)
(while (and (not covered) methods)
(setq covered
(member (car methods) gnus-agent-covered-methods)
methods (cdr methods)))
covered)))
(defun gnus-agent-possibly-save-gcc ()
"Save GCC if Gnus is unplugged."
(when (and (not gnus-plugged) (gnus-agent-any-covered-gcc))
(save-excursion
(goto-char (point-min))
(let ((case-fold-search t))
(while (re-search-forward "^gcc:" nil t)
(replace-match (concat gnus-agent-gcc-header ":") 'fixedcase))))))
(defun gnus-agent-possibly-do-gcc ()
"Do GCC if Gnus is plugged."
(when (or gnus-plugged (not (gnus-agent-any-covered-gcc)))
(gnus-inews-do-gcc)))
;;;
;;; Group mode commands
;;;
(defun gnus-agent-fetch-groups (n)
"Put all new articles in the current groups into the Agent."
(interactive "P")
(unless gnus-plugged
(error "Groups can't be fetched when Gnus is unplugged"))
(gnus-group-iterate n 'gnus-agent-fetch-group))
(defun gnus-agent-fetch-group (group)
"Put all new articles in GROUP into the Agent."
(interactive (list (gnus-group-group-name)))
(unless gnus-plugged
(error "Groups can't be fetched when Gnus is unplugged"))
(unless group
(error "No group on the current line"))
(let ((gnus-command-method (gnus-find-method-for-group group)))
(gnus-agent-with-fetch
(gnus-agent-fetch-group-1 group gnus-command-method)
(gnus-message 5 "Fetching %s...done" group))))
(defun gnus-agent-add-group (category arg)
"Add the current group to an agent category."
(interactive
(list
(intern
(completing-read
"Add to category: "
(mapcar (lambda (cat) (list (symbol-name (car cat))))
gnus-category-alist)
nil t))
current-prefix-arg))
(let ((cat (assq category gnus-category-alist))
c groups)
(gnus-group-iterate arg
(lambda (group)
(when (cadddr (setq c (gnus-group-category group)))
(setf (cadddr c) (delete group (cadddr c))))
(push group groups)))
(setf (cadddr cat) (nconc (cadddr cat) groups))
(gnus-category-write)))
(defun gnus-agent-remove-group (arg)
"Remove the current group from its agent category, if any."
(interactive "P")
(let (c)
(gnus-group-iterate arg
(lambda (group)
(when (cadddr (setq c (gnus-group-category group)))
(setf (cadddr c) (delete group (cadddr c))))))
(gnus-category-write)))
(defun gnus-agent-synchronize-flags ()
"Synchronize unplugged flags with servers."
(interactive)
(save-excursion
(dolist (gnus-command-method gnus-agent-covered-methods)
(when (file-exists-p (gnus-agent-lib-file "flags"))
(gnus-agent-synchronize-flags-server gnus-command-method)))))
(defun gnus-agent-possibly-synchronize-flags ()
"Synchronize flags according to `gnus-agent-synchronize-flags'."
(interactive)
(save-excursion
(dolist (gnus-command-method gnus-agent-covered-methods)
(when (file-exists-p (gnus-agent-lib-file "flags"))
(gnus-agent-possibly-synchronize-flags-server gnus-command-method)))))
(defun gnus-agent-synchronize-flags-server (method)
"Synchronize flags set when unplugged for server."
(let ((gnus-command-method method))
(when (file-exists-p (gnus-agent-lib-file "flags"))
(set-buffer (get-buffer-create " *Gnus Agent flag synchronize*"))
(erase-buffer)
(nnheader-insert-file-contents (gnus-agent-lib-file "flags"))
(if (null (gnus-check-server gnus-command-method))
(message "Couldn't open server %s" (nth 1 gnus-command-method))
(while (not (eobp))
(if (null (eval (read (current-buffer))))
(progn (forward-line)
(kill-line -1))
(write-file (gnus-agent-lib-file "flags"))
(error "Couldn't set flags from file %s"
(gnus-agent-lib-file "flags"))))
(delete-file (gnus-agent-lib-file "flags")))
(kill-buffer nil))))
(defun gnus-agent-possibly-synchronize-flags-server (method)
"Synchronize flags for server according to `gnus-agent-synchronize-flags'."
(when (or (and gnus-agent-synchronize-flags
(not (eq gnus-agent-synchronize-flags 'ask)))
(and (eq gnus-agent-synchronize-flags 'ask)
(gnus-y-or-n-p (format "Synchronize flags on server `%s'? "
(cadr method)))))
(gnus-agent-synchronize-flags-server method)))
;;;
;;; Server mode commands
;;;
(defun gnus-agent-add-server (server)
"Enroll SERVER in the agent program."
(interactive (list (gnus-server-server-name)))
(unless server
(error "No server on the current line"))
(let ((method (gnus-server-get-method nil (gnus-server-server-name))))
(when (member method gnus-agent-covered-methods)
(error "Server already in the agent program"))
(push method gnus-agent-covered-methods)
(gnus-agent-write-servers)
(message "Entered %s into the Agent" server)))
(defun gnus-agent-remove-server (server)
"Remove SERVER from the agent program."
(interactive (list (gnus-server-server-name)))
(unless server
(error "No server on the current line"))
(let ((method (gnus-server-get-method nil (gnus-server-server-name))))
(unless (member method gnus-agent-covered-methods)
(error "Server not in the agent program"))
(setq gnus-agent-covered-methods
(delete method gnus-agent-covered-methods))
(gnus-agent-write-servers)
(message "Removed %s from the agent" server)))
(defun gnus-agent-read-servers ()
"Read the alist of covered servers."
(setq gnus-agent-covered-methods
(gnus-agent-read-file
(nnheader-concat gnus-agent-directory "lib/servers"))))
(defun gnus-agent-write-servers ()
"Write the alist of covered servers."
(gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
(let ((coding-system-for-write nnheader-file-coding-system)
(file-name-coding-system nnmail-pathname-coding-system))
(with-temp-file (nnheader-concat gnus-agent-directory "lib/servers")
(prin1 gnus-agent-covered-methods (current-buffer)))))
;;;
;;; Summary commands
;;;
(defun gnus-agent-mark-article (n &optional unmark)
"Mark the next N articles as downloadable.
If N is negative, mark backward instead. If UNMARK is non-nil, remove
the mark instead. The difference between N and the actual number of
articles marked is returned."
(interactive "p")
(let ((backward (< n 0))
(n (abs n)))
(while (and
(> n 0)
(progn
(gnus-summary-set-agent-mark
(gnus-summary-article-number) unmark)
(zerop (gnus-summary-next-subject (if backward -1 1) nil t))))
(setq n (1- n)))
(when (/= 0 n)
(gnus-message 7 "No more articles"))
(gnus-summary-recenter)
(gnus-summary-position-point)
n))
(defun gnus-agent-unmark-article (n)
"Remove the downloadable mark from the next N articles.
If N is negative, unmark backward instead. The difference between N and
the actual number of articles unmarked is returned."
(interactive "p")
(gnus-agent-mark-article n t))
(defun gnus-agent-toggle-mark (n)
"Toggle the downloadable mark from the next N articles.
If N is negative, toggle backward instead. The difference between N and
the actual number of articles toggled is returned."
(interactive "p")
(gnus-agent-mark-article n 'toggle))
(defun gnus-summary-set-agent-mark (article &optional unmark)
"Mark ARTICLE as downloadable."
(let ((unmark (if (and (not (null unmark)) (not (eq t unmark)))
(memq article gnus-newsgroup-downloadable)
unmark)))
(if unmark
(progn
(setq gnus-newsgroup-downloadable
(delq article gnus-newsgroup-downloadable))
(push article gnus-newsgroup-undownloaded))
(setq gnus-newsgroup-undownloaded
(delq article gnus-newsgroup-undownloaded))
(push article gnus-newsgroup-downloadable))
(gnus-summary-update-mark
(if unmark gnus-undownloaded-mark gnus-downloadable-mark)
'unread)))
(defun gnus-agent-get-undownloaded-list ()
"Mark all unfetched articles as read."
(let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
(when (and (not gnus-plugged)
(gnus-agent-method-p gnus-command-method))
(gnus-agent-load-alist gnus-newsgroup-name)
;; First mark all undownloaded articles as undownloaded.
(let ((articles (append gnus-newsgroup-unreads
gnus-newsgroup-marked
gnus-newsgroup-dormant))
article)
(while (setq article (pop articles))
(unless (or (cdr (assq article gnus-agent-article-alist))
(memq article gnus-newsgroup-downloadable)
(memq article gnus-newsgroup-cached))
(push article gnus-newsgroup-undownloaded))))
;; Then mark downloaded downloadable as not-downloadable,
;; if you get my drift.
(let ((articles gnus-newsgroup-downloadable)
article)
(while (setq article (pop articles))
(when (cdr (assq article gnus-agent-article-alist))
(setq gnus-newsgroup-downloadable
(delq article gnus-newsgroup-downloadable))))))))
(defun gnus-agent-catchup ()
"Mark all undownloaded articles as read."
(interactive)
(save-excursion
(while gnus-newsgroup-undownloaded
(gnus-summary-mark-article
(pop gnus-newsgroup-undownloaded) gnus-catchup-mark)))
(gnus-summary-position-point))
;;;
;;; Internal functions
;;;
(defun gnus-agent-save-active (method)
(gnus-agent-save-active-1 method 'gnus-active-to-gnus-format))
(defun gnus-agent-save-active-1 (method function)
(when (gnus-agent-method-p method)
(let* ((gnus-command-method method)
(new (gnus-make-hashtable (count-lines (point-min) (point-max))))
(file (gnus-agent-lib-file "active")))
(funcall function nil new)
(gnus-agent-write-active file new)
(erase-buffer)
(nnheader-insert-file-contents file))))
(defun gnus-agent-write-active (file new)
(let ((orig (gnus-make-hashtable (count-lines (point-min) (point-max))))
(file (gnus-agent-lib-file "active"))
elem osym)
(when (file-exists-p file)
(with-temp-buffer
(nnheader-insert-file-contents file)
(gnus-active-to-gnus-format nil orig))
(mapatoms
(lambda (sym)
(when (and sym (boundp sym))
(if (and (boundp (setq osym (intern (symbol-name sym) orig)))
(setq elem (symbol-value osym)))
(setcdr elem (cdr (symbol-value sym)))
(set (intern (symbol-name sym) orig) (symbol-value sym)))))
new))
(gnus-make-directory (file-name-directory file))
(let ((coding-system-for-write gnus-agent-file-coding-system))
;; The hashtable contains real names of groups, no more prefix
;; removing, so set `full' to `t'.
(gnus-write-active-file file orig t))))
(defun gnus-agent-save-groups (method)
(gnus-agent-save-active-1 method 'gnus-groups-to-gnus-format))
(defun gnus-agent-save-group-info (method group active)
(when (gnus-agent-method-p method)
(let* ((gnus-command-method method)
(coding-system-for-write nnheader-file-coding-system)
(file-name-coding-system nnmail-pathname-coding-system)
(file (gnus-agent-lib-file "active"))
oactive)
(gnus-make-directory (file-name-directory file))
(with-temp-file file
;; Emacs got problem to match non-ASCII group in multibyte buffer.
(mm-disable-multibyte)
(when (file-exists-p file)
(nnheader-insert-file-contents file))
(goto-char (point-min))
(when (re-search-forward
(concat "^" (regexp-quote group) " ") nil t)
(save-excursion
(save-restriction
(narrow-to-region (match-beginning 0)
(progn
(forward-line 1)
(point)))
(setq oactive (car (nnmail-parse-active)))))
(gnus-delete-line))
(insert (format "%S %d %d y\n" (intern group)
(cdr active)
(or (car oactive) (car active))))
(goto-char (point-max))
(while (search-backward "\\." nil t)
(delete-char 1))))))
(defun gnus-agent-group-path (group)
"Translate GROUP into a file name."
(if nnmail-use-long-file-names
(gnus-group-real-name group)
(nnheader-translate-file-chars
(nnheader-replace-chars-in-string
(nnheader-replace-duplicate-chars-in-string
(nnheader-replace-chars-in-string
(gnus-group-real-name group)
?/ ?_)
?. ?_)
?. ?/))))
(defun gnus-agent-method-p (method)
"Say whether METHOD is covered by the agent."
(member method gnus-agent-covered-methods))
(defun gnus-agent-get-function (method)
(if (and (not gnus-plugged)
(gnus-agent-method-p method))
(progn
(require 'nnagent)
'nnagent)
(car method)))
;;; History functions
(defun gnus-agent-history-buffer ()
(cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))
(defun gnus-agent-open-history ()
(save-excursion
(push (cons (gnus-agent-method)
(set-buffer (gnus-get-buffer-create
(format " *Gnus agent %s history*"
(gnus-agent-method)))))
gnus-agent-history-buffers)
(mm-disable-multibyte) ;; everything is binary
(erase-buffer)
(insert "\n")
(let ((file (gnus-agent-lib-file "history")))
(when (file-exists-p file)
(nnheader-insert-file-contents file))
(set (make-local-variable 'gnus-agent-file-name) file))))
(defun gnus-agent-save-history ()
(save-excursion
(set-buffer gnus-agent-current-history)
(gnus-make-directory (file-name-directory gnus-agent-file-name))
(let ((coding-system-for-write gnus-agent-file-coding-system))
(write-region (1+ (point-min)) (point-max)
gnus-agent-file-name nil 'silent))))
(defun gnus-agent-close-history ()
(when (gnus-buffer-live-p gnus-agent-current-history)
(kill-buffer gnus-agent-current-history)
(setq gnus-agent-history-buffers
(delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
gnus-agent-history-buffers))))
(defun gnus-agent-enter-history (id group-arts date)
(save-excursion
(set-buffer gnus-agent-current-history)
(goto-char (point-max))
(let ((p (point)))
(insert id "\t" (number-to-string date) "\t")
(while group-arts
(insert (format "%S" (intern (caar group-arts)))
" " (number-to-string (cdr (pop group-arts)))
" "))
(insert "\n")
(while (search-backward "\\." p t)
(delete-char 1)))))
(defun gnus-agent-article-in-history-p (id)
(save-excursion
(set-buffer (gnus-agent-history-buffer))
(goto-char (point-min))
(search-forward (concat "\n" id "\t") nil t)))
(defun gnus-agent-history-path (id)
(save-excursion
(set-buffer (gnus-agent-history-buffer))
(goto-char (point-min))
(when (search-forward (concat "\n" id "\t") nil t)
(let ((method (gnus-agent-method)))
(let (paths group)
(while (not (numberp (setq group (read (current-buffer)))))
(push (concat method "/" group) paths))
(nreverse paths))))))
;;;
;;; Fetching
;;;
(defun gnus-agent-fetch-articles (group articles)
"Fetch ARTICLES from GROUP and put them into the Agent."
(when articles
;; Prune off articles that we have already fetched.
(while (and articles
(cdr (assq (car articles) gnus-agent-article-alist)))
(pop articles))
(let ((arts articles))
(while (cdr arts)
(if (cdr (assq (cadr arts) gnus-agent-article-alist))
(setcdr arts (cddr arts))
(setq arts (cdr arts)))))
(when articles
(let ((dir (concat
(gnus-agent-directory)
(gnus-agent-group-path group) "/"))
(date (time-to-days (current-time)))
(case-fold-search t)
pos crosses id elem)
(gnus-make-directory dir)
(gnus-message 7 "Fetching articles for %s..." group)
;; Fetch the articles from the backend.
(if (gnus-check-backend-function 'retrieve-articles group)
(setq pos (gnus-retrieve-articles articles group))
(with-temp-buffer
(let (article)
(while (setq article (pop articles))
(when (or
(gnus-backlog-request-article group article
nntp-server-buffer)
(gnus-request-article article group))
(goto-char (point-max))
(push (cons article (point)) pos)
(insert-buffer-substring nntp-server-buffer)))
(copy-to-buffer nntp-server-buffer (point-min) (point-max))
(setq pos (nreverse pos)))))
;; Then save these articles into the Agent.
(save-excursion
(set-buffer nntp-server-buffer)
(while pos
(narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
(goto-char (point-min))
(when (search-forward "\n\n" nil t)
(when (search-backward "\nXrefs: " nil t)
;; Handle crossposting.
(skip-chars-forward "^ ")
(skip-chars-forward " ")
(setq crosses nil)
(while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) +")
(push (cons (buffer-substring (match-beginning 1)
(match-end 1))
(buffer-substring (match-beginning 2)
(match-end 2)))
crosses)
(goto-char (match-end 0)))
(gnus-agent-crosspost crosses (caar pos))))
(goto-char (point-min))
(if (not (re-search-forward "^Message-ID: *<\\([^>\n]+\\)>" nil t))
(setq id "No-Message-ID-in-article")
(setq id (buffer-substring (match-beginning 1) (match-end 1))))
(let ((coding-system-for-write
gnus-agent-file-coding-system))
(write-region (point-min) (point-max)
(concat dir (number-to-string (caar pos)))
nil 'silent))
(when (setq elem (assq (caar pos) gnus-agent-article-alist))
(setcdr elem t))
(gnus-agent-enter-history
id (or crosses (list (cons group (caar pos)))) date)
(widen)
(pop pos)))
(gnus-agent-save-alist group)))))
(defun gnus-agent-crosspost (crosses article)
(let (gnus-agent-article-alist group alist beg end)
(save-excursion
(set-buffer gnus-agent-overview-buffer)
(when (nnheader-find-nov-line article)
(forward-word 1)
(setq beg (point))
(setq end (progn (forward-line 1) (point)))))
(while crosses
(setq group (caar crosses))
(unless (setq alist (assoc group gnus-agent-group-alist))
(push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
gnus-agent-group-alist))
(setcdr alist (cons (cons (cdar crosses) t) (cdr alist)))
(save-excursion
(set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
group)))
(when (= (point-max) (point-min))
(push (cons group (current-buffer)) gnus-agent-buffer-alist)
(ignore-errors
(nnheader-insert-file-contents
(gnus-agent-article-name ".overview" group))))
(nnheader-find-nov-line (string-to-number (cdar crosses)))
(insert (string-to-number (cdar crosses)))
(insert-buffer-substring gnus-agent-overview-buffer beg end))
(pop crosses))))
(defun gnus-agent-flush-cache ()
(save-excursion
(while gnus-agent-buffer-alist
(set-buffer (cdar gnus-agent-buffer-alist))
(let ((coding-system-for-write
gnus-agent-file-coding-system))
(write-region (point-min) (point-max)
(gnus-agent-article-name ".overview"
(caar gnus-agent-buffer-alist))
nil 'silent))
(pop gnus-agent-buffer-alist))
(while gnus-agent-group-alist
(with-temp-file (caar gnus-agent-group-alist)
(princ (cdar gnus-agent-group-alist))
(insert "\n"))
(pop gnus-agent-group-alist))))
(if (fboundp 'union)
(defalias 'gnus-agent-union 'union)
(defun gnus-agent-union (l1 l2)
"Set union of lists L1 and L2."
(cond ((null l1) l2)
((null l2) l1)
((equal l1 l2) l1)
(t
(or (>= (length l1) (length l2))
(setq l1 (prog1 l2 (setq l2 l1))))
(while l2
(or (memq (car l2) l1)
(push (car l2) l1))
(pop l2))
l1))))
(defun gnus-agent-fetch-headers (group &optional force)
(let ((articles (gnus-list-of-unread-articles group))
(gnus-decode-encoded-word-function 'identity)
(file (gnus-agent-article-name ".overview" group)))
;; Add article with marks to list of article headers we want to fetch.
(dolist (arts (gnus-info-marks (gnus-get-info group)))
(setq articles (gnus-agent-union (gnus-uncompress-sequence (cdr arts))
articles)))
(setq articles (sort articles '<))
;; Remove known articles.
(when (gnus-agent-load-alist group)
(setq articles (gnus-sorted-intersection
articles
(gnus-uncompress-range
(cons (1+ (caar (last gnus-agent-article-alist)))
(cdr (gnus-active group)))))))
;; Fetch them.
(gnus-make-directory (nnheader-translate-file-chars
(file-name-directory file) t))
(when articles
(gnus-message 7 "Fetching headers for %s..." group)
(save-excursion
(set-buffer nntp-server-buffer)
(unless (eq 'nov (gnus-retrieve-headers articles group))
(nnvirtual-convert-headers))
;; Save these headers for later processing.
(copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
(when (file-exists-p file)
(gnus-agent-braid-nov group articles file))
(let ((coding-system-for-write
gnus-agent-file-coding-system))
(write-region (point-min) (point-max) file nil 'silent))
(gnus-agent-save-alist group articles nil)
(gnus-agent-enter-history
"last-header-fetched-for-session"
(list (cons group (nth (- (length articles) 1) articles)))
(time-to-days (current-time)))
articles))))
(defsubst gnus-agent-copy-nov-line (article)
(let (b e)
(set-buffer gnus-agent-overview-buffer)
(setq b (point))
(if (eq article (read (current-buffer)))
(setq e (progn (forward-line 1) (point)))
(progn
(beginning-of-line)
(setq e b)))
(set-buffer nntp-server-buffer)
(insert-buffer-substring gnus-agent-overview-buffer b e)))
(defun gnus-agent-braid-nov (group articles file)
(set-buffer gnus-agent-overview-buffer)
(goto-char (point-min))
(set-buffer nntp-server-buffer)
(erase-buffer)
(nnheader-insert-file-contents file)
(goto-char (point-max))
(if (or (= (point-min) (point-max))
(progn
(forward-line -1)
(< (read (current-buffer)) (car articles))))
;; We have only headers that are after the older headers,
;; so we just append them.
(progn
(goto-char (point-max))
(insert-buffer-substring gnus-agent-overview-buffer))
;; We do it the hard way.
(nnheader-find-nov-line (car articles))
(gnus-agent-copy-nov-line (car articles))
(pop articles)
(while (and articles
(not (eobp)))
(while (and (not (eobp))
(< (read (current-buffer)) (car articles)))
(forward-line 1))
(beginning-of-line)
(unless (eobp)
(gnus-agent-copy-nov-line (car articles))
(setq articles (cdr articles))))
(when articles
(let (b e)
(set-buffer gnus-agent-overview-buffer)
(setq b (point)
e (point-max))
(set-buffer nntp-server-buffer)
(insert-buffer-substring gnus-agent-overview-buffer b e)))))
(defun gnus-agent-load-alist (group &optional dir)
"Load the article-state alist for GROUP."
(setq gnus-agent-article-alist
(gnus-agent-read-file
(if dir
(expand-file-name ".agentview" dir)
(gnus-agent-article-name ".agentview" group)))))
(defun gnus-agent-save-alist (group &optional articles state dir)
"Save the article-state alist for GROUP."
(let ((file-name-coding-system nnmail-pathname-coding-system))
(with-temp-file (if dir
(expand-file-name ".agentview" dir)
(gnus-agent-article-name ".agentview" group))
(princ (setq gnus-agent-article-alist
(nconc gnus-agent-article-alist
(mapcar (lambda (article) (cons article state))
articles)))
(current-buffer))
(insert "\n"))))
(defun gnus-agent-article-name (article group)
(expand-file-name (if (stringp article) article (string-to-number article))
(file-name-as-directory
(expand-file-name (gnus-agent-group-path group)
(gnus-agent-directory)))))
(defun gnus-agent-batch-confirmation (msg)
"Show error message and return t."
(gnus-message 1 msg)
t)
;;;###autoload
(defun gnus-agent-batch-fetch ()
"Start Gnus and fetch session."
(interactive)
(gnus)
(let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
(gnus-agent-fetch-session))
(gnus-group-exit))
(defun gnus-agent-fetch-session ()
"Fetch all articles and headers that are eligible for fetching."
(interactive)
(unless gnus-agent-covered-methods
(error "No servers are covered by the Gnus agent"))
(unless gnus-plugged
(error "Can't fetch articles while Gnus is unplugged"))
(let ((methods gnus-agent-covered-methods)
groups group gnus-command-method)
(save-excursion
(while methods
(condition-case err
(progn
(setq gnus-command-method (car methods))
(when (or (gnus-server-opened gnus-command-method)
(gnus-open-server gnus-command-method))
(setq groups (gnus-groups-from-server (car methods)))
(gnus-agent-with-fetch
(while (setq group (pop groups))
(when (<= (gnus-group-level group) gnus-agent-handle-level)
(gnus-agent-fetch-group-1 group gnus-command-method))))))
(error
(unless (funcall gnus-agent-confirmation-function
(format "Error (%s). Continue? " err))
(error "Cannot fetch articles into the Gnus agent")))
(quit
(unless (funcall gnus-agent-confirmation-function
(format "Quit (%s). Continue? " err))
(signal 'quit "Cannot fetch articles into the Gnus agent."))))
(pop methods))
(gnus-message 6 "Finished fetching articles into the Gnus agent"))))
(defun gnus-agent-fetch-group-1 (group method)
"Fetch GROUP."
(let ((gnus-command-method method)
(gnus-newsgroup-name group)
gnus-newsgroup-dependencies gnus-newsgroup-headers
gnus-newsgroup-scored gnus-headers gnus-score
gnus-use-cache articles arts
category predicate info marks score-param
(gnus-summary-expunge-below gnus-summary-expunge-below)
(gnus-summary-mark-below gnus-summary-mark-below)
(gnus-orphan-score gnus-orphan-score)
;; Maybe some other gnus-summary local variables should also
;; be put here.
)
(unless (gnus-check-group group)
(error "Can't open server for %s" group))
;; Fetch headers.
(when (and (or (gnus-active group) (gnus-activate-group group))
(setq articles (gnus-agent-fetch-headers group))
(let ((nntp-server-buffer gnus-agent-overview-buffer))
;; Parse them and see which articles we want to fetch.
(setq gnus-newsgroup-dependencies
(make-vector (length articles) 0))
(setq gnus-newsgroup-headers
(gnus-get-newsgroup-headers-xover articles nil nil
group))
;; `gnus-agent-overview-buffer' may be killed for
;; timeout reason. If so, recreate it.
(gnus-agent-create-buffer)))
(setq category (gnus-group-category group))
(setq predicate
(gnus-get-predicate
(or (gnus-group-find-parameter group 'agent-predicate t)
(cadr category))))
(if (memq (caaddr predicate) '(gnus-agent-true gnus-agent-false))
;; Simple implementation
(setq arts
(and (eq (caaddr predicate) 'gnus-agent-true) articles))
(setq arts nil)
(setq score-param
(or (gnus-group-get-parameter group 'agent-score t)
(caddr category)))
;; Translate score-param into real one
(cond
((not score-param))
((eq score-param 'file)
(setq score-param (gnus-all-score-files group)))
((stringp (car score-param)))
(t
(setq score-param (list (list score-param)))))
(when score-param
(gnus-score-headers score-param))
(while (setq gnus-headers (pop gnus-newsgroup-headers))
(setq gnus-score
(or (cdr (assq (mail-header-number gnus-headers)
gnus-newsgroup-scored))
gnus-summary-default-score))
(when (funcall predicate)
(push (mail-header-number gnus-headers)
arts))))
;; Fetch the articles.
(when arts
(gnus-agent-fetch-articles group arts)))
;; Perhaps we have some additional articles to fetch.
(setq arts (assq 'download (gnus-info-marks
(setq info (gnus-get-info group)))))
(when (cdr arts)
(gnus-agent-fetch-articles
group (gnus-uncompress-range (cdr arts)))
(setq marks (delq arts (gnus-info-marks info)))
(gnus-info-set-marks info marks)
(gnus-dribble-enter
(concat "(gnus-group-set-info '"
(gnus-prin1-to-string info)
")")))))
;;;
;;; Agent Category Mode
;;;
(defvar gnus-category-mode-hook nil
"Hook run in `gnus-category-mode' buffers.")
(defvar gnus-category-line-format " %(%20c%): %g\n"
"Format of category lines.")
(defvar gnus-category-mode-line-format "Gnus: %%b"
"The format specification for the category mode line.")
(defvar gnus-agent-short-article 100
"Articles that have fewer lines than this are short.")
(defvar gnus-agent-long-article 200
"Articles that have more lines than this are long.")
(defvar gnus-agent-low-score 0
"Articles that have a score lower than this have a low score.")
(defvar gnus-agent-high-score 0
"Articles that have a score higher than this have a high score.")
;;; Internal variables.
(defvar gnus-category-buffer "*Agent Category*")
(defvar gnus-category-line-format-alist
`((?c gnus-tmp-name ?s)
(?g gnus-tmp-groups ?d)))
(defvar gnus-category-mode-line-format-alist
`((?u user-defined ?s)))
(defvar gnus-category-line-format-spec nil)
(defvar gnus-category-mode-line-format-spec nil)
(defvar gnus-category-mode-map nil)
(put 'gnus-category-mode 'mode-class 'special)
(unless gnus-category-mode-map
(setq gnus-category-mode-map (make-sparse-keymap))
(suppress-keymap gnus-category-mode-map)
(gnus-define-keys gnus-category-mode-map
"q" gnus-category-exit
"k" gnus-category-kill
"c" gnus-category-copy
"a" gnus-category-add
"p" gnus-category-edit-predicate
"g" gnus-category-edit-groups
"s" gnus-category-edit-score
"l" gnus-category-list
"\C-c\C-i" gnus-info-find-node
"\C-c\C-b" gnus-bug))
(defvar gnus-category-menu-hook nil
"*Hook run after the creation of the menu.")
(defun gnus-category-make-menu-bar ()
(gnus-turn-off-edit-menu 'category)
(unless (boundp 'gnus-category-menu)
(easy-menu-define
gnus-category-menu gnus-category-mode-map ""
'("Categories"
["Add" gnus-category-add t]
["Kill" gnus-category-kill t]
["Copy" gnus-category-copy t]
["Edit predicate" gnus-category-edit-predicate t]
["Edit score" gnus-category-edit-score t]
["Edit groups" gnus-category-edit-groups t]
["Exit" gnus-category-exit t]))
(gnus-run-hooks 'gnus-category-menu-hook)))
(defun gnus-category-mode ()
"Major mode for listing and editing agent categories.
All normal editing commands are switched off.
\\<gnus-category-mode-map>
For more in-depth information on this mode, read the manual
(`\\[gnus-info-find-node]').
The following commands are available:
\\{gnus-category-mode-map}"
(interactive)
(when (gnus-visual-p 'category-menu 'menu)
(gnus-category-make-menu-bar))
(kill-all-local-variables)
(gnus-simplify-mode-line)
(setq major-mode 'gnus-category-mode)
(setq mode-name "Category")
(gnus-set-default-directory)
(setq mode-line-process nil)
(use-local-map gnus-category-mode-map)
(buffer-disable-undo)
(setq truncate-lines t)
(setq buffer-read-only t)
(gnus-run-hooks 'gnus-category-mode-hook))
(defalias 'gnus-category-position-point 'gnus-goto-colon)
(defun gnus-category-insert-line (category)
(let* ((gnus-tmp-name (car category))
(gnus-tmp-groups (length (cadddr category))))
(beginning-of-line)
(gnus-add-text-properties
(point)
(prog1 (1+ (point))
;; Insert the text.
(eval gnus-category-line-format-spec))
(list 'gnus-category gnus-tmp-name))))
(defun gnus-enter-category-buffer ()
"Go to the Category buffer."
(interactive)
(gnus-category-setup-buffer)
(gnus-configure-windows 'category)
(gnus-category-prepare))
(defun gnus-category-setup-buffer ()
(unless (get-buffer gnus-category-buffer)
(save-excursion
(set-buffer (gnus-get-buffer-create gnus-category-buffer))
(gnus-category-mode))))
(defun gnus-category-prepare ()
(gnus-set-format 'category-mode)
(gnus-set-format 'category t)
(let ((alist gnus-category-alist)
(buffer-read-only nil))
(erase-buffer)
(while alist
(gnus-category-insert-line (pop alist)))
(goto-char (point-min))
(gnus-category-position-point)))
(defun gnus-category-name ()
(or (get-text-property (gnus-point-at-bol) 'gnus-category)
(error "No category on the current line")))
(defun gnus-category-read ()
"Read the category alist."
(setq gnus-category-alist
(or (gnus-agent-read-file
(nnheader-concat gnus-agent-directory "lib/categories"))
(list (list 'default 'short nil nil)))))
(defun gnus-category-write ()
"Write the category alist."
(setq gnus-category-predicate-cache nil
gnus-category-group-cache nil)
(gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
(with-temp-file (nnheader-concat gnus-agent-directory "lib/categories")
(prin1 gnus-category-alist (current-buffer))))
(defun gnus-category-edit-predicate (category)
"Edit the predicate for CATEGORY."
(interactive (list (gnus-category-name)))
(let ((info (assq category gnus-category-alist)))
(gnus-edit-form
(cadr info) (format "Editing the predicate for category %s" category)
`(lambda (predicate)
(setcar (cdr (assq ',category gnus-category-alist)) predicate)
(gnus-category-write)
(gnus-category-list)))))
(defun gnus-category-edit-score (category)
"Edit the score expression for CATEGORY."
(interactive (list (gnus-category-name)))
(let ((info (assq category gnus-category-alist)))
(gnus-edit-form
(caddr info)
(format "Editing the score expression for category %s" category)
`(lambda (groups)
(setcar (cddr (assq ',category gnus-category-alist)) groups)
(gnus-category-write)
(gnus-category-list)))))
(defun gnus-category-edit-groups (category)
"Edit the group list for CATEGORY."
(interactive (list (gnus-category-name)))
(let ((info (assq category gnus-category-alist)))
(gnus-edit-form
(cadddr info) (format "Editing the group list for category %s" category)
`(lambda (groups)
(setcar (nthcdr 3 (assq ',category gnus-category-alist)) groups)
(gnus-category-write)
(gnus-category-list)))))
(defun gnus-category-kill (category)
"Kill the current category."
(interactive (list (gnus-category-name)))
(let ((info (assq category gnus-category-alist))
(buffer-read-only nil))
(gnus-delete-line)
(setq gnus-category-alist (delq info gnus-category-alist))
(gnus-category-write)))
(defun gnus-category-copy (category to)
"Copy the current category."
(interactive (list (gnus-category-name) (intern (read-string "New name: "))))
(let ((info (assq category gnus-category-alist)))
(push (list to (gnus-copy-sequence (cadr info))
(gnus-copy-sequence (caddr info)) nil)
gnus-category-alist)
(gnus-category-write)
(gnus-category-list)))
(defun gnus-category-add (category)
"Create a new category."
(interactive "SCategory name: ")
(when (assq category gnus-category-alist)
(error "Category %s already exists" category))
(push (list category 'false nil nil)
gnus-category-alist)
(gnus-category-write)
(gnus-category-list))
(defun gnus-category-list ()
"List all categories."
(interactive)
(gnus-category-prepare))
(defun gnus-category-exit ()
"Return to the group buffer."
(interactive)
(kill-buffer (current-buffer))
(gnus-configure-windows 'group t))
;; To avoid having 8-bit characters in the source file.
(defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))
(defvar gnus-category-predicate-alist
'((spam . gnus-agent-spam-p)
(short . gnus-agent-short-p)
(long . gnus-agent-long-p)
(low . gnus-agent-low-scored-p)
(high . gnus-agent-high-scored-p)
(true . gnus-agent-true)
(false . gnus-agent-false))
"Mapping from short score predicate symbols to predicate functions.")
(defun gnus-agent-spam-p ()
"Say whether an article is spam or not."
(unless gnus-agent-spam-hashtb
(setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
(if (not (equal (mail-header-references gnus-headers) ""))
nil
(let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
(prog1
(gnus-gethash string gnus-agent-spam-hashtb)
(gnus-sethash string t gnus-agent-spam-hashtb)))))
(defun gnus-agent-short-p ()
"Say whether an article is short or not."
(< (mail-header-lines gnus-headers) gnus-agent-short-article))
(defun gnus-agent-long-p ()
"Say whether an article is long or not."
(> (mail-header-lines gnus-headers) gnus-agent-long-article))
(defun gnus-agent-low-scored-p ()
"Say whether an article has a low score or not."
(< gnus-score gnus-agent-low-score))
(defun gnus-agent-high-scored-p ()
"Say whether an article has a high score or not."
(> gnus-score gnus-agent-high-score))
(defun gnus-category-make-function (cat)
"Make a function from category CAT."
`(lambda () ,(gnus-category-make-function-1 cat)))
(defun gnus-agent-true ()
"Return t."
t)
(defun gnus-agent-false ()
"Return nil."
nil)
(defun gnus-category-make-function-1 (cat)
"Make a function from category CAT."
(cond
;; Functions are just returned as is.
((or (symbolp cat)
(gnus-functionp cat))
`(,(or (cdr (assq cat gnus-category-predicate-alist))
cat)))
;; More complex category.
((consp cat)
`(,(cond
((memq (car cat) '(& and))
'and)
((memq (car cat) '(| or))
'or)
((memq (car cat) gnus-category-not)
'not))
,@(mapcar 'gnus-category-make-function-1 (cdr cat))))
(t
(error "Unknown category type: %s" cat))))
(defun gnus-get-predicate (predicate)
"Return the predicate for CATEGORY."
(or (cdr (assoc predicate gnus-category-predicate-cache))
(cdar (push (cons predicate
(gnus-category-make-function predicate))
gnus-category-predicate-cache))))
(defun gnus-group-category (group)
"Return the category GROUP belongs to."
(unless gnus-category-group-cache
(setq gnus-category-group-cache (gnus-make-hashtable 1000))
(let ((cs gnus-category-alist)
groups cat)
(while (setq cat (pop cs))
(setq groups (cadddr cat))
(while groups
(gnus-sethash (pop groups) cat gnus-category-group-cache)))))
(or (gnus-gethash group gnus-category-group-cache)
(assq 'default gnus-category-alist)))
(defun gnus-agent-expire ()
"Expire all old articles."
(interactive)
(let ((methods gnus-agent-covered-methods)
(day (- (time-to-days (current-time)) gnus-agent-expire-days))
gnus-command-method sym group articles
history overview file histories elem art nov-file low info
unreads marked article orig lowest highest)
(save-excursion
(setq overview (gnus-get-buffer-create " *expire overview*"))
(while (setq gnus-command-method (pop methods))
(when (file-exists-p (gnus-agent-lib-file "active"))
(with-temp-buffer
(nnheader-insert-file-contents (gnus-agent-lib-file "active"))
(gnus-active-to-gnus-format
gnus-command-method
(setq orig (gnus-make-hashtable
(count-lines (point-min) (point-max))))))
(let ((expiry-hashtb (gnus-make-hashtable 1023)))
(gnus-agent-open-history)
(set-buffer
(setq gnus-agent-current-history
(setq history (gnus-agent-history-buffer))))
(goto-char (point-min))
(when (> (buffer-size) 1)
(goto-char (point-min))
(while (not (eobp))
(skip-chars-forward "^\t")
(if (> (read (current-buffer)) day)
;; New article; we don't expire it.
(forward-line 1)
;; Old article. Schedule it for possible nuking.
(while (not (eolp))
(setq sym (let ((obarray expiry-hashtb) s)
(setq s (read (current-buffer)))
(if (stringp s) (intern s) s)))
(if (boundp sym)
(set sym (cons (cons (read (current-buffer)) (point))
(symbol-value sym)))
(set sym (list (cons (read (current-buffer)) (point)))))
(skip-chars-forward " "))
(forward-line 1)))
;; We now have all articles that can possibly be expired.
(mapatoms
(lambda (sym)
(setq group (symbol-name sym)
articles (sort (symbol-value sym) 'car-less-than-car)
low (car (gnus-active group))
info (gnus-get-info group)
unreads (ignore-errors
(gnus-list-of-unread-articles group))
marked (nconc
(gnus-uncompress-range
(cdr (assq 'tick (gnus-info-marks info))))
(gnus-uncompress-range
(cdr (assq 'dormant
(gnus-info-marks info)))))
nov-file (gnus-agent-article-name ".overview" group)
lowest nil
highest nil)
(gnus-agent-load-alist group)
(gnus-message 5 "Expiring articles in %s" group)
(set-buffer overview)
(erase-buffer)
(when (file-exists-p nov-file)
(nnheader-insert-file-contents nov-file))
(goto-char (point-min))
(setq article 0)
(while (setq elem (pop articles))
(setq article (car elem))
(when (or (null low)
(< article low)
gnus-agent-expire-all
(and (not (memq article unreads))
(not (memq article marked))))
;; Find and nuke the NOV line.
(while (and (not (eobp))
(or (not (numberp
(setq art (read (current-buffer)))))
(< art article)))
(if (and (numberp art)
(file-exists-p
(gnus-agent-article-name
(number-to-string art) group)))
(progn
(unless lowest
(setq lowest art))
(setq highest art)
(forward-line 1))
;; Remove old NOV lines that have no articles.
(gnus-delete-line)))
(if (or (eobp)
(/= art article))
(beginning-of-line)
(gnus-delete-line))
;; Nuke the article.
(when (file-exists-p
(setq file (gnus-agent-article-name
(number-to-string article)
group)))
(delete-file file))
;; Schedule the history line for nuking.
(push (cdr elem) histories)))
(gnus-make-directory (file-name-directory nov-file))
(let ((coding-system-for-write
gnus-agent-file-coding-system))
(write-region (point-min) (point-max) nov-file nil 'silent))
;; Delete the unwanted entries in the alist.
(setq gnus-agent-article-alist
(sort gnus-agent-article-alist 'car-less-than-car))
(let* ((alist gnus-agent-article-alist)
(prev (cons nil alist))
(first prev)
expired)
(while (and alist
(<= (caar alist) article))
(if (or (not (cdar alist))
(not (file-exists-p
(gnus-agent-article-name
(number-to-string
(caar alist))
group))))
(progn
(push (caar alist) expired)
(setcdr prev (setq alist (cdr alist))))
(setq prev alist
alist (cdr alist))))
(setq gnus-agent-article-alist (cdr first))
(gnus-agent-save-alist group)
;; Mark all articles up to the first article
;; in `gnus-article-alist' as read.
(when (and info (caar gnus-agent-article-alist))
(setcar (nthcdr 2 info)
(gnus-range-add
(nth 2 info)
(cons 1 (- (caar gnus-agent-article-alist) 1)))))
;; Maybe everything has been expired from `gnus-article-alist'
;; and so the above marking as read could not be conducted,
;; or there are expired article within the range of the alist.
(when (and info
expired
(or (not (caar gnus-agent-article-alist))
(> (car expired)
(caar gnus-agent-article-alist))))
(setcar (nthcdr 2 info)
(gnus-add-to-range
(nth 2 info)
(nreverse expired))))
(gnus-dribble-enter
(concat "(gnus-group-set-info '"
(gnus-prin1-to-string info)
")")))
(when lowest
(if (gnus-gethash group orig)
(setcar (gnus-gethash group orig) lowest)
(gnus-sethash group (cons lowest highest) orig))))
expiry-hashtb)
(set-buffer history)
(setq histories (nreverse (sort histories '<)))
(while histories
(goto-char (pop histories))
(gnus-delete-line))
(gnus-agent-save-history)
(gnus-agent-close-history)
(gnus-write-active-file
(gnus-agent-lib-file "active") orig))
(gnus-message 4 "Expiry...done")))))))
;;;###autoload
(defun gnus-agent-batch ()
(interactive)
(let ((init-file-user "")
(gnus-always-read-dribble-file t))
(gnus))
(gnus-group-send-drafts)
(gnus-agent-fetch-session))
(provide 'gnus-agent)
;;; gnus-agent.el ends here