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349 lines
12 KiB
EmacsLisp
349 lines
12 KiB
EmacsLisp
;;; nnkiboze.el --- select virtual news access for Gnus
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;; Copyright (C) 1995 Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
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;; Keywords: news
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; The other access methods (nntp, nnspool, etc) are general news
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;; access methods. This module relies on Gnus and can not be used
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;; separately.
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;;; Code:
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(require 'nntp)
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(require 'nnheader)
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(require 'gnus)
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(require 'gnus-score)
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(defvar nnkiboze-directory
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(expand-file-name (or gnus-article-save-directory "~/News/"))
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"nnkiboze will put its files in this directory.")
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(defconst nnkiboze-version "nnkiboze 1.0"
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"Version numbers of this version of nnkiboze.")
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(defvar nnkiboze-current-group nil)
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(defvar nnkiboze-current-score-group "")
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(defvar nnkiboze-status-string "")
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;;; Interface functions.
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(defun nnkiboze-retrieve-headers (articles &optional group server)
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(nnkiboze-possibly-change-newsgroups group)
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(if gnus-nov-is-evil
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nil
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(if (stringp (car articles))
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'headers
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(let ((first (car articles))
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(last (progn (while (cdr articles) (setq articles (cdr articles)))
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(car articles)))
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(nov (nnkiboze-nov-file-name)))
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(if (file-exists-p nov)
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(save-excursion
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(set-buffer nntp-server-buffer)
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(erase-buffer)
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(insert-file-contents nov)
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(goto-char (point-min))
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(while (and (not (eobp)) (< first (read (current-buffer))))
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(forward-line 1))
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(beginning-of-line)
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(if (not (eobp)) (delete-region 1 (point)))
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(while (and (not (eobp)) (>= last (read (current-buffer))))
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(forward-line 1))
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(beginning-of-line)
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(if (not (eobp)) (delete-region (point) (point-max)))
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'nov))))))
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(defun nnkiboze-open-server (newsgroups &optional something)
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"Open a virtual newsgroup that contains NEWSGROUPS."
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(gnus-make-directory nnkiboze-directory)
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(nnheader-init-server-buffer))
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(defun nnkiboze-close-server (&rest dum)
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"Close news server."
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t)
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(defalias 'nnkiboze-request-quit (symbol-function 'nnkiboze-close-server))
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(defun nnkiboze-server-opened (&optional server)
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"Return server process status, T or NIL.
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If the stream is opened, return T, otherwise return NIL."
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(and nntp-server-buffer
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(get-buffer nntp-server-buffer)))
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(defun nnkiboze-status-message (&optional server)
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"Return server status response as string."
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nnkiboze-status-string)
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(defun nnkiboze-request-article (article &optional newsgroup server buffer)
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"Select article by message number."
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(nnkiboze-possibly-change-newsgroups newsgroup)
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(if (not (numberp article))
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;; This is a real kludge. It might not work at times, but it
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;; does no harm I think. The only alternative is to offer no
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;; article fetching by message-id at all.
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(nntp-request-article article newsgroup gnus-nntp-server buffer)
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(let* ((header (gnus-get-header-by-number article))
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(xref (mail-header-xref header))
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igroup iarticle)
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(or xref (error "nnkiboze: No xref"))
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(or (string-match " \\([^ ]+\\):\\([0-9]+\\)" xref)
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(error "nnkiboze: Malformed xref"))
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(setq igroup (substring xref (match-beginning 1) (match-end 1)))
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(setq iarticle (string-to-int
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(substring xref (match-beginning 2) (match-end 2))))
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(and (gnus-request-group igroup t)
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(gnus-request-article iarticle igroup buffer)))))
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(defun nnkiboze-request-group (group &optional server dont-check)
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"Make GROUP the current newsgroup."
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(nnkiboze-possibly-change-newsgroups group)
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(if dont-check
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()
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(let ((nov-file (nnkiboze-nov-file-name))
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beg end total)
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(save-excursion
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(set-buffer nntp-server-buffer)
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(erase-buffer)
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(if (not (file-exists-p nov-file))
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(insert (format "211 0 0 0 %s\n" group))
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(insert-file-contents nov-file)
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(if (zerop (buffer-size))
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(insert (format "211 0 0 0 %s\n" group))
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(goto-char (point-min))
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(and (looking-at "[0-9]+") (setq beg (read (current-buffer))))
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(goto-char (point-max))
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(and (re-search-backward "^[0-9]" nil t)
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(setq end (read (current-buffer))))
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(setq total (count-lines (point-min) (point-max)))
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(erase-buffer)
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(insert (format "211 %d %d %d %s\n" total beg end group)))))))
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t)
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(defun nnkiboze-close-group (group &optional server)
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(nnkiboze-possibly-change-newsgroups group)
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;; Remove NOV lines of articles that are marked as read.
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(if (or (not (file-exists-p (nnkiboze-nov-file-name)))
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(not (eq major-mode 'gnus-summary-mode)))
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()
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(save-excursion
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(let ((unreads gnus-newsgroup-unreads)
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(unselected gnus-newsgroup-unselected))
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(set-buffer (get-buffer-create "*nnkiboze work*"))
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(buffer-disable-undo (current-buffer))
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(erase-buffer)
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(let ((cur (current-buffer))
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article)
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(insert-file-contents (nnkiboze-nov-file-name))
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(goto-char (point-min))
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(while (looking-at "[0-9]+")
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(if (or (memq (setq article (read cur)) unreads)
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(memq article unselected))
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(forward-line 1)
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(delete-region (progn (beginning-of-line) (point))
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(progn (forward-line 1) (point)))))
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(write-file (nnkiboze-nov-file-name))
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(kill-buffer (current-buffer)))))
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(setq nnkiboze-current-group nil)))
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(defun nnkiboze-request-list (&optional server)
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(setq nnkiboze-status-string "nnkiboze: LIST is not implemented.")
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nil)
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(defun nnkiboze-request-newgroups (date &optional server)
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"List new groups."
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(setq nnkiboze-status-string "NEWGROUPS is not supported.")
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nil)
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(defun nnkiboze-request-list-newsgroups (&optional server)
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(setq nnkiboze-status-string "nnkiboze: LIST NEWSGROUPS is not implemented.")
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nil)
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(defalias 'nnkiboze-request-post 'nntp-request-post)
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(defalias 'nnkiboze-request-post-buffer 'nntp-request-post-buffer)
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;;; Internal functions.
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(defun nnkiboze-possibly-change-newsgroups (group)
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(setq nnkiboze-current-group group))
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(defun nnkiboze-prefixed-name (group)
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(gnus-group-prefixed-name group '(nnkiboze "")))
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;;;###autoload
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(defun nnkiboze-generate-groups ()
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"Usage: emacs -batch -l nnkiboze -f nnkiboze-generate-groups
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Finds out what articles are to be part of the nnkiboze groups."
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(interactive)
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(let ((nnmail-spool-file nil)
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(gnus-use-dribble-file nil)
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(gnus-read-active-file t)
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(gnus-expert-user t))
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(gnus))
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(let* ((gnus-newsrc-alist (gnus-copy-sequence gnus-newsrc-alist))
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(newsrc gnus-newsrc-alist))
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(while newsrc
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(if (string-match "nnkiboze" (car (car newsrc)))
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(nnkiboze-generate-group (car (car newsrc))))
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(setq newsrc (cdr newsrc)))))
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(defun nnkiboze-score-file (group)
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(list (expand-file-name
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(concat gnus-kill-files-directory nnkiboze-current-score-group
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"." gnus-score-file-suffix))))
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(defun nnkiboze-generate-group (group)
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(let* ((info (nth 2 (gnus-gethash group gnus-newsrc-hashtb)))
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(newsrc-file (concat nnkiboze-directory group ".newsrc"))
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(nov-file (concat nnkiboze-directory group ".nov"))
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(regexp (nth 1 (nth 4 info)))
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(gnus-expert-user t)
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(gnus-large-newsgroup nil)
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(gnus-score-find-score-files-function 'nnkiboze-score-file)
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gnus-select-group-hook gnus-summary-prepare-hook
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gnus-thread-sort-functions gnus-show-threads
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gnus-visual
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method nnkiboze-newsrc nov-buffer gname newsrc active
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ginfo lowest)
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(setq nnkiboze-current-score-group group)
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(or info (error "No such group: %s" group))
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(and (file-exists-p newsrc-file) (load newsrc-file))
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(save-excursion
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(set-buffer (setq nov-buffer (find-file-noselect nov-file)))
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(buffer-disable-undo (current-buffer)))
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;; Go through the active hashtb and add new all groups that match the
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;; kiboze regexp.
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(mapatoms
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(lambda (group)
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(if (and (string-match regexp (setq gname (symbol-name group))) ; Match
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(not (assoc gname nnkiboze-newsrc)) ; It isn't registered
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(numberp (car (symbol-value group))) ; It is active
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(not (string-match "^nnkiboze:" gname))) ; Exclude kibozes
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(setq nnkiboze-newsrc
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(cons (cons gname (1- (car (symbol-value group))))
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nnkiboze-newsrc))))
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gnus-active-hashtb)
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(setq newsrc nnkiboze-newsrc)
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(while newsrc
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(if (not (setq active (gnus-gethash
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(car (car newsrc)) gnus-active-hashtb)))
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(setq nnkiboze-newsrc (delq (car newsrc) nnkiboze-newsrc))
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(switch-to-buffer gnus-group-buffer)
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(gnus-group-jump-to-group (car (car newsrc)))
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(if (and (setq ginfo (nth 2 (gnus-gethash (gnus-group-group-name)
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gnus-newsrc-hashtb)))
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(nth 3 ginfo))
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(setcar (nthcdr 3 ginfo) nil))
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(if (not (and (or (not ginfo)
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(> (length (gnus-list-of-unread-articles
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(car ginfo))) 0))
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(progn
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(gnus-group-select-group nil)
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(eq major-mode 'gnus-summary-mode))))
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()
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(setq lowest (cdr (car newsrc)))
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(setq method (gnus-find-method-for-group gnus-newsgroup-name))
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(and (eq method gnus-select-method) (setq method nil))
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(while gnus-newsgroup-scored
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(if (> (car (car gnus-newsgroup-scored)) lowest)
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(nnkiboze-enter-nov
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nov-buffer
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(gnus-get-header-by-number (car (car gnus-newsgroup-scored)))
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(if method
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(gnus-group-prefixed-name gnus-newsgroup-name method)
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gnus-newsgroup-name)))
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(setq gnus-newsgroup-scored (cdr gnus-newsgroup-scored)))
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(gnus-summary-quit)))
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(setcdr (car newsrc) (car active))
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(setq newsrc (cdr newsrc)))
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(set-buffer nov-buffer)
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(save-buffer)
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(kill-buffer (current-buffer))
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(set-buffer (get-buffer-create "*nnkiboze work*"))
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(buffer-disable-undo (current-buffer))
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(erase-buffer)
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(insert "(setq nnkiboze-newsrc '" (prin1-to-string nnkiboze-newsrc)
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")\n")
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(write-file newsrc-file)
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(kill-buffer (current-buffer))
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(switch-to-buffer gnus-group-buffer)
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(gnus-group-list-groups 5 nil)))
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(defun nnkiboze-enter-nov (buffer header group)
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(save-excursion
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(set-buffer buffer)
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(goto-char (point-max))
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(let ((xref (mail-header-xref header))
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(prefix (gnus-group-real-prefix group))
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(first t)
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article)
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(if (zerop (forward-line -1))
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(progn
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(setq article (1+ (read (current-buffer))))
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(forward-line 1))
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(setq article 1))
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(insert (int-to-string article) "\t"
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(or (mail-header-subject header) "") "\t"
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(or (mail-header-from header) "") "\t"
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(or (mail-header-date header) "") "\t"
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(or (mail-header-id header) "") "\t"
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(or (mail-header-references header) "") "\t"
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(int-to-string (or (mail-header-chars header) 0)) "\t"
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(int-to-string (or (mail-header-lines header) 0)) "\t")
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(if (or (not xref) (equal "" xref))
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(insert "Xref: " (system-name) " " group ":"
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(int-to-string (mail-header-number header))
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"\t\n")
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(insert (mail-header-xref header) "\t\n")
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(search-backward "\t" nil t)
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(search-backward "\t" nil t)
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(while (re-search-forward
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"[^ ]+:[0-9]+"
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(save-excursion (end-of-line) (point)) t)
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(if first
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;; The first xref has to be the group this article
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;; really came for - this is the article nnkiboze
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;; will request when it is asked for the article.
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(save-excursion
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(goto-char (match-beginning 0))
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(insert prefix group ":"
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(int-to-string (mail-header-number header)) " ")
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(setq first nil)))
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(save-excursion
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(goto-char (match-beginning 0))
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(insert prefix)))))))
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(defun nnkiboze-nov-file-name ()
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(concat nnkiboze-directory
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(nnkiboze-prefixed-name nnkiboze-current-group) ".nov"))
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(provide 'nnkiboze)
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;;; nnkiboze.el ends here
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