--- /dev/null
+;;; gnus-agent.el --- unplugged support for Gnus
+;; Copyright (C) 1997,98 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)
+(eval-when-compile (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)
+
+;;; Internal variables
+
+(defvar gnus-agent-meta-information-header "X-Gnus-Agent-Meta-Information")
+
+(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 'no-conversion)
+
+;; Dynamic variables
+(defvar gnus-headers)
+(defvar gnus-score)
+
+;;;
+;;; Setup
+;;;
+
+(defun gnus-open-agent ()
+ (setq gnus-agent t)
+ (gnus-agent-read-servers)
+ (gnus-category-read)
+ (setq gnus-agent-overview-buffer
+ (gnus-get-buffer-create " *Gnus agent overview*"))
+ (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))
+
+(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."
+ (nnheader-temp-write nil
+ (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 ()
+ "Path 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 path of the Gnus agent library FILE."
+ (concat (gnus-agent-directory) "agent.lib/" file))
+
+;;; 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)))
+
+(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
+ (progn
+ (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
+ "JS" gnus-group-send-drafts
+ "Ja" gnus-agent-add-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-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")))
+
+(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))))
+
+;;;
+;;; Group mode commands
+;;;
+
+(defun gnus-agent-fetch-groups (n)
+ "Put all new articles in the current groups into the Agent."
+ (interactive "P")
+ (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 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)))
+
+;;;
+;;; 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."
+ (nnheader-temp-write (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)
+ (let ((articles gnus-newsgroup-unreads)
+ article)
+ (while (setq article (pop articles))
+ (unless (or (cdr (assq article gnus-agent-article-alist))
+ (memq article gnus-newsgroup-downloadable))
+ (push article gnus-newsgroup-undownloaded)))))))
+
+(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)
+ (when (gnus-agent-method-p method)
+ (let* ((gnus-command-method method)
+ (file (gnus-agent-lib-file "active")))
+ (gnus-make-directory (file-name-directory file))
+ (let ((coding-system-for-write gnus-agent-file-coding-system))
+ (write-region (point-min) (point-max) file nil 'silent))
+ (when (file-exists-p (gnus-agent-lib-file "groups"))
+ (delete-file (gnus-agent-lib-file "groups"))))))
+
+(defun gnus-agent-save-groups (method)
+ (let* ((gnus-command-method method)
+ (file (gnus-agent-lib-file "groups")))
+ (gnus-make-directory (file-name-directory file))
+ (let ((coding-system-for-write gnus-agent-file-coding-system))
+ (write-region (point-min) (point-max) file nil 'silent))
+ (when (file-exists-p (gnus-agent-lib-file "active"))
+ (delete-file (gnus-agent-lib-file "active")))))
+
+(defun gnus-agent-save-group-info (method group active)
+ (when (gnus-agent-method-p method)
+ (let* ((gnus-command-method method)
+ (file (if nntp-server-list-active-group
+ (gnus-agent-lib-file "active")
+ (gnus-agent-lib-file "groups"))))
+ (gnus-make-directory (file-name-directory file))
+ (nnheader-temp-write file
+ (when (file-exists-p file)
+ (nnheader-insert-file-contents file))
+ (goto-char (point-min))
+ (if nntp-server-list-active-group
+ (progn
+ (when (re-search-forward
+ (concat "^" (regexp-quote group) " ") nil t)
+ (gnus-delete-line))
+ (insert group " " (number-to-string (cdr active)) " "
+ (number-to-string (car active)) " y\n"))
+ (when (re-search-forward (concat (regexp-quote group) " ") nil t)
+ (gnus-delete-line))
+ (insert-buffer-substring nntp-server-buffer))))))
+
+(defun gnus-agent-group-path (group)
+ "Translate GROUP into a path."
+ (if nnmail-use-long-file-names
+ (gnus-group-real-name group)
+ (nnheader-replace-chars-in-string
+ (nnheader-translate-file-chars (gnus-group-real-name group))
+ ?. ?/)))
+
+\f
+
+(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)
+ (erase-buffer)
+ (insert "\n")
+ (let ((file (gnus-agent-lib-file "history")))
+ (when (file-exists-p file)
+ (insert-file 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))
+ (insert id "\t" (number-to-string date) "\t")
+ (while group-arts
+ (insert (caar group-arts) " " (number-to-string (cdr (pop group-arts)))
+ " "))
+ (insert "\n")))
+
+(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 (gnus-time-to-day (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))
+ (nnheader-temp-write nil
+ (let (article)
+ (while (setq article (pop articles))
+ (when (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
+ (nnheader-temp-write (caar gnus-agent-group-alist)
+ (princ (cdar gnus-agent-group-alist))
+ (insert "\n"))
+ (pop gnus-agent-group-alist))))
+
+(defun gnus-agent-fetch-headers (group &optional force)
+ (let ((articles (if (gnus-agent-load-alist group)
+ (gnus-sorted-intersection
+ (gnus-list-of-unread-articles group)
+ (gnus-uncompress-range
+ (cons (1+ (caar (last gnus-agent-article-alist)))
+ (cdr (gnus-active group)))))
+ (gnus-list-of-unread-articles group))))
+ ;; Fetch them.
+ (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))
+ (let (file)
+ (when (file-exists-p
+ (setq file (gnus-agent-article-name ".overview" group)))
+ (gnus-agent-braid-nov group articles file))
+ (gnus-make-directory (nnheader-translate-file-chars
+ (file-name-directory 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)))
+ (gnus-time-to-day (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
+ (concat dir ".agentview")
+ (gnus-agent-article-name ".agentview" group)))))
+
+(defun gnus-agent-save-alist (group &optional articles state dir)
+ "Save the article-state alist for GROUP."
+ (nnheader-temp-write (if dir
+ (concat dir ".agentview")
+ (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)
+ (concat (gnus-agent-directory) (gnus-agent-group-path group) "/"
+ (if (stringp article) article (string-to-number article))))
+
+;;;###autoload
+(defun gnus-agent-batch-fetch ()
+ "Start Gnus and fetch session."
+ (interactive)
+ (gnus)
+ (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
+ (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)))))
+ (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-dependencies gnus-newsgroup-headers
+ gnus-newsgroup-scored gnus-headers gnus-score
+ gnus-use-cache articles arts
+ category predicate info marks score-param)
+ ;; Fetch headers.
+ (when (and (or (gnus-active group) (gnus-activate-group group))
+ (setq articles (gnus-agent-fetch-headers group)))
+ ;; 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))
+ (setq category (gnus-group-category group))
+ (setq predicate
+ (gnus-get-predicate
+ (or (gnus-group-get-parameter group 'agent-predicate)
+ (cadr category))))
+ (setq score-param
+ (or (gnus-group-get-parameter group 'agent-score)
+ (caddr category)))
+ (when score-param
+ (gnus-score-headers (list (list score-param))))
+ (setq arts nil)
+ (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))))
+
+;;;
+;;; 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 (current-buffer))
+ (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)
+ (nnheader-temp-write (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)
+ (setf (cadr (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)
+ (setf (caddr (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)
+ (setf (cadddr (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)
+ (gnus-category-write)
+ (setq gnus-category-alist (delq info gnus-category-alist))))
+
+(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 'true 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 (- (gnus-time-to-day (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)
+ (save-excursion
+ (setq overview (gnus-get-buffer-create " *expire overview*"))
+ (while (setq gnus-command-method (pop methods))
+ (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))
+ (read (current-buffer))))
+ (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))
+ (when info
+ (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 (file-exists-p
+ (gnus-agent-article-name
+ (number-to-string art) group))
+ (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 (car 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)
+ ")")))))
+ 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-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
projects / emacs.git / commitdiff