mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-23 10:34:07 +00:00
321 lines
9.9 KiB
EmacsLisp
321 lines
9.9 KiB
EmacsLisp
;;; nndb.el --- nndb access for Gnus
|
||
|
||
;; Copyright (C) 1997, 1998, 2000, 2002, 2003, 2004,
|
||
;; 2005, 2006, 2007 Free Software Foundation, Inc.
|
||
|
||
;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
|
||
;; Kai Grossjohann <grossjohann@ls6.informatik.uni-dortmund.de>
|
||
;; Joe Hildebrand <joe.hildebrand@ilg.com>
|
||
;; David Blacka <davidb@rwhois.net>
|
||
;; Keywords: news
|
||
|
||
;; 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 3, 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., 51 Franklin Street, Fifth Floor,
|
||
;; Boston, MA 02110-1301, USA.
|
||
|
||
;;; Commentary:
|
||
|
||
;;; This was based upon Kai Grossjohan's shamessly snarfed code and
|
||
;;; further modified by Joe Hildebrand. It has been updated for Red
|
||
;;; Gnus.
|
||
|
||
;; TODO:
|
||
;;
|
||
;; * Fix bug where server connection can be lost and impossible to regain
|
||
;; This hasn't happened to me in a while; think it was fixed in Rgnus
|
||
;;
|
||
;; * make it handle different nndb servers seemlessly
|
||
;;
|
||
;; * Optimize expire if FORCE
|
||
;;
|
||
;; * Optimize move (only expire once)
|
||
;;
|
||
;; * Deal with add/deletion of groups
|
||
;;
|
||
;; * make the backend TOUCH an article when marked as expireable (will
|
||
;; make article expire 'expiry' days after that moment).
|
||
|
||
;;-
|
||
;; Register nndb with known select methods.
|
||
|
||
(require 'gnus-start)
|
||
(unless (assoc "nndb" gnus-valid-select-methods)
|
||
(gnus-declare-backend "nndb" 'mail 'respool 'address 'prompt-address))
|
||
|
||
;;; Code:
|
||
|
||
(require 'nnmail)
|
||
(require 'nnheader)
|
||
(require 'nntp)
|
||
(eval-when-compile (require 'cl))
|
||
|
||
;; Declare nndb as derived from nntp
|
||
|
||
(nnoo-declare nndb nntp)
|
||
|
||
;; Variables specific to nndb
|
||
|
||
;;- currently not used but just in case...
|
||
(defvoo nndb-deliver-program "nndel"
|
||
"*The program used to put a message in an NNDB group.")
|
||
|
||
(defvoo nndb-server-side-expiry nil
|
||
"If t, expiry calculation will occur on the server side.")
|
||
|
||
(defvoo nndb-set-expire-date-on-mark nil
|
||
"If t, the expiry date for a given article will be set to the time
|
||
it was marked as expireable; otherwise the date will be the time the
|
||
article was posted to nndb")
|
||
|
||
;; Variables copied from nntp
|
||
|
||
(defvoo nndb-server-opened-hook '(nntp-send-authinfo-from-file)
|
||
"Like nntp-server-opened-hook."
|
||
nntp-server-opened-hook)
|
||
|
||
(defvoo nndb-address "localhost"
|
||
"*The name of the NNDB server."
|
||
nntp-address)
|
||
|
||
(defvoo nndb-port-number 9000
|
||
"*Port number to connect to."
|
||
nntp-port-number)
|
||
|
||
;; change to 'news if you are actually using nndb for news
|
||
(defvoo nndb-article-type 'mail)
|
||
|
||
(defvoo nndb-status-string nil "" nntp-status-string)
|
||
|
||
|
||
|
||
(defconst nndb-version "nndb 0.7"
|
||
"Version numbers of this version of NNDB.")
|
||
|
||
|
||
;;; Interface functions.
|
||
|
||
(nnoo-define-basics nndb)
|
||
|
||
;;------------------------------------------------------------------
|
||
|
||
;; this function turns the lisp list into a string list. There is
|
||
;; probably a more efficient way to do this.
|
||
(defun nndb-build-article-string (articles)
|
||
(let (art-string art)
|
||
(while articles
|
||
(setq art (pop articles))
|
||
(setq art-string (concat art-string art " ")))
|
||
art-string))
|
||
|
||
(defun nndb-build-expire-rest-list (total expire)
|
||
(let (art rest)
|
||
(while total
|
||
(setq art (pop total))
|
||
(if (memq art expire)
|
||
()
|
||
(push art rest)))
|
||
rest))
|
||
|
||
|
||
;;
|
||
(deffoo nndb-request-type (group &optional article)
|
||
nndb-article-type)
|
||
|
||
;; nndb-request-update-info does not exist and is not needed
|
||
|
||
;; nndb-request-update-mark does not exist; it should be used to TOUCH
|
||
;; articles as they are marked exipirable
|
||
(defun nndb-touch-article (group article)
|
||
(nntp-send-command nil "X-TOUCH" article))
|
||
|
||
(deffoo nndb-request-update-mark
|
||
(group article mark)
|
||
"Sets the expiry date for ARTICLE in GROUP to now, if the mark is 'E'"
|
||
(if (and nndb-set-expire-date-on-mark (string-equal mark "E"))
|
||
(nndb-touch-article group article))
|
||
mark)
|
||
|
||
;; nndb-request-create-group -- currently this isn't necessary; nndb
|
||
;; creates groups on demand.
|
||
|
||
;; todo -- use some other time than the creation time of the article
|
||
;; best is time since article has been marked as expirable
|
||
|
||
(defun nndb-request-expire-articles-local
|
||
(articles &optional group server force)
|
||
"Let gnus do the date check and issue the delete commands."
|
||
(let (msg art delete-list (num-delete 0) rest)
|
||
(nntp-possibly-change-group group server)
|
||
(while articles
|
||
(setq art (pop articles))
|
||
(nntp-send-command "^\\([23]\\|^423\\).*\n" "X-DATE" art)
|
||
(setq msg (nndb-status-message))
|
||
(if (string-match "^423" msg)
|
||
()
|
||
(or (string-match "'\\(.+\\)'" msg)
|
||
(error "Not a valid response for X-DATE command: %s"
|
||
msg))
|
||
(if (nnmail-expired-article-p
|
||
group
|
||
(date-to-time (substring msg (match-beginning 1) (match-end 1)))
|
||
force)
|
||
(progn
|
||
(setq delete-list (concat delete-list " " (int-to-string art)))
|
||
(setq num-delete (1+ num-delete)))
|
||
(push art rest))))
|
||
(if (> (length delete-list) 0)
|
||
(progn
|
||
(nnheader-message 5 "Deleting %s article(s) from %s"
|
||
(int-to-string num-delete) group)
|
||
(nntp-send-command "^[23].*\n" "X-DELETE" delete-list))
|
||
)
|
||
|
||
(nnheader-message 5 "")
|
||
(nconc rest articles)))
|
||
|
||
(defun nndb-get-remote-expire-response ()
|
||
(let (list)
|
||
(set-buffer nntp-server-buffer)
|
||
(goto-char (point-min))
|
||
(if (looking-at "^[34]")
|
||
;; x-expire returned error--presume no articles were expirable)
|
||
(setq list nil)
|
||
;; otherwise, pull all of the following numbers into the list
|
||
(re-search-forward "follows\r?\n?" nil t)
|
||
(while (re-search-forward "^[0-9]+$" nil t)
|
||
(push (string-to-number (match-string 0)) list)))
|
||
list))
|
||
|
||
(defun nndb-request-expire-articles-remote
|
||
(articles &optional group server force)
|
||
"Let the nndb backend expire articles"
|
||
(let (days art-string delete-list (num-delete 0))
|
||
(nntp-possibly-change-group group server)
|
||
|
||
;; first calculate the wait period in days
|
||
(setq days (or (and nnmail-expiry-wait-function
|
||
(funcall nnmail-expiry-wait-function group))
|
||
nnmail-expiry-wait))
|
||
;; now handle the special cases
|
||
(cond (force
|
||
(setq days 0))
|
||
((eq days 'never)
|
||
;; This isn't an expirable group.
|
||
(setq days -1))
|
||
((eq days 'immediate)
|
||
(setq days 0)))
|
||
|
||
|
||
;; build article string
|
||
(setq art-string (concat days " " (nndb-build-article-string articles)))
|
||
(nntp-send-command "^\.\r?\n\\|^[345].*\n" "X-EXPIRE" art-string)
|
||
|
||
(setq delete-list (nndb-get-remote-expire-response))
|
||
(setq num-delete (length delete-list))
|
||
(if (> num-delete 0)
|
||
(nnheader-message 5 "Deleting %s article(s) from %s"
|
||
(int-to-string num-delete) group))
|
||
|
||
(nndb-build-expire-rest-list articles delete-list)))
|
||
|
||
(deffoo nndb-request-expire-articles
|
||
(articles &optional group server force)
|
||
"Expires ARTICLES from GROUP on SERVER.
|
||
If FORCE, delete regardless of exiration date, otherwise use normal
|
||
expiry mechanism."
|
||
(if nndb-server-side-expiry
|
||
(nndb-request-expire-articles-remote articles group server force)
|
||
(nndb-request-expire-articles-local articles group server force)))
|
||
|
||
(deffoo nndb-request-move-article
|
||
(article group server accept-form &optional last)
|
||
"Move ARTICLE (a number) from GROUP on SERVER.
|
||
Evals ACCEPT-FORM in current buffer, where the article is.
|
||
Optional LAST is ignored."
|
||
;; we guess that the second arg in accept-form is the new group,
|
||
;; which it will be for nndb, which is all that matters anyway
|
||
(let ((new-group (nth 1 accept-form)) result)
|
||
(nntp-possibly-change-group group server)
|
||
|
||
;; use the move command for nndb-to-nndb moves
|
||
(if (string-match "^nndb" new-group)
|
||
(let ((new-group-name (gnus-group-real-name new-group)))
|
||
(nntp-send-command "^[23].*\n" "X-MOVE" article new-group-name)
|
||
(cons new-group article))
|
||
;; else move normally
|
||
(let ((artbuf (get-buffer-create " *nndb move*")))
|
||
(and
|
||
(nndb-request-article article group server artbuf)
|
||
(save-excursion
|
||
(set-buffer artbuf)
|
||
(insert-buffer-substring nntp-server-buffer)
|
||
(setq result (eval accept-form))
|
||
(kill-buffer (current-buffer))
|
||
result)
|
||
(nndb-request-expire-articles (list article)
|
||
group
|
||
server
|
||
t))
|
||
result)
|
||
)))
|
||
|
||
(deffoo nndb-request-accept-article (group server &optional last)
|
||
"The article in the current buffer is put into GROUP."
|
||
(nntp-possibly-change-group group server)
|
||
(let (art msg)
|
||
(when (nntp-send-command "^[23].*\r?\n" "ACCEPT" group)
|
||
(nnheader-insert "")
|
||
(nntp-send-buffer "^[23].*\n"))
|
||
|
||
(set-buffer nntp-server-buffer)
|
||
(setq msg (buffer-string))
|
||
(or (string-match "^\\([0-9]+\\)" msg)
|
||
(error "nndb: %s" msg))
|
||
(setq art (substring msg (match-beginning 1) (match-end 1)))
|
||
(nnheader-message 5 "nndb: accepted %s" art)
|
||
(list art)))
|
||
|
||
(deffoo nndb-request-replace-article (article group buffer)
|
||
"ARTICLE is the number of the article in GROUP to be replaced with the contents of the BUFFER."
|
||
(set-buffer buffer)
|
||
(when (nntp-send-command "^[23].*\r?\n" "X-REPLACE" (int-to-string article))
|
||
(nnheader-insert "")
|
||
(nntp-send-buffer "^[23.*\n")
|
||
(list (int-to-string article))))
|
||
|
||
; nndb-request-delete-group does not exist
|
||
; todo -- maybe later
|
||
|
||
; nndb-request-rename-group does not exist
|
||
; todo -- maybe later
|
||
|
||
;; -- standard compatability functions
|
||
|
||
(deffoo nndb-status-message (&optional server)
|
||
"Return server status as a string."
|
||
(set-buffer nntp-server-buffer)
|
||
(buffer-string))
|
||
|
||
;; Import stuff from nntp
|
||
|
||
(nnoo-import nndb
|
||
(nntp))
|
||
|
||
(provide 'nndb)
|
||
|
||
;;; arch-tag: 83bd6fb4-58d9-4fed-a901-c6c625ad5f8a
|
||
;;; nndb.el ends here
|