1 ;;;; nnkiboze.el --- select virtual news access for (ding) Gnus
2 ;; Copyright (C) 1995 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to
21 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 ;; The other access methods (nntp, nnspool, etc) are general news
26 ;; access methods. This module relies on Gnus and can not be used
36 (defvar nnkiboze-directory
37 (expand-file-name (or gnus-article-save-directory "~/News/"))
38 "nnkiboze will put its files in this directory.")
42 (defconst nnkiboze-version "nnkiboze 0.0"
43 "Version numbers of this version of nnkiboze.")
45 (defvar nnkiboze-current-group nil)
46 (defvar nnkiboze-current-score-group "")
47 (defvar nnkiboze-status-string "")
51 ;;; Interface functions.
53 (defun nnkiboze-retrieve-headers (articles &optional group server)
54 (nnkiboze-possibly-change-newsgroups group)
55 (if (or gnus-nov-is-evil)
57 (let ((first (car articles))
58 (last (progn (while (cdr articles) (setq articles (cdr articles)))
60 (nov (nnkiboze-nov-file-name)))
61 (if (file-exists-p nov)
63 (set-buffer nntp-server-buffer)
65 (insert-file-contents nov)
66 (goto-char (point-min))
67 (while (and (not (eobp)) (< first (read (current-buffer))))
70 (if (not (eobp)) (delete-region 1 (point)))
71 (while (and (not (eobp)) (>= last (read (current-buffer))))
74 (if (not (eobp)) (delete-region (point) (point-max)))
77 (defun nnkiboze-open-server (newsgroups &optional something)
78 "Open a virtual newsgroup that contains NEWSGROUPS."
79 (gnus-make-directory nnkiboze-directory)
80 (nnheader-init-server-buffer))
82 (defun nnkiboze-close-server (&rest dum)
86 (fset 'nnkiboze-request-quit (symbol-function 'nnkiboze-close-server))
88 (defun nnkiboze-server-opened (&optional server)
89 "Return server process status, T or NIL.
90 If the stream is opened, return T, otherwise return NIL."
91 (and nntp-server-buffer
92 (get-buffer nntp-server-buffer)))
94 (defun nnkiboze-status-message (&optional server)
95 "Return server status response as string."
96 nnkiboze-status-string)
98 (defun nnkiboze-request-article (article &optional newsgroup server buffer)
99 "Select article by message number."
100 (nnkiboze-possibly-change-newsgroups newsgroup)
101 (if (not (numberp article))
102 ;; This is a real cludge. It might not work at times, but it
103 ;; does no harm I think. The only alternative is to offer no
104 ;; article fetching by message-id at all.
105 (nntp-request-article article newsgroup gnus-nntp-server buffer)
106 (let* ((header (gnus-get-header-by-number article))
107 (xref (header-xref header))
109 (or xref (error "nnkiboze: No xref"))
110 (or (string-match " \\([^ ]+\\):\\([0-9]+\\)" xref)
111 (error "nnkiboze: Malformed xref"))
112 (setq igroup (substring xref (match-beginning 1) (match-end 1)))
113 (setq iarticle (string-to-int
114 (substring xref (match-beginning 2) (match-end 2))))
115 (and (gnus-request-group igroup t)
116 (gnus-request-article iarticle igroup buffer)))))
118 (defun nnkiboze-request-group (group &optional server dont-check)
119 "Make GROUP the current newsgroup."
120 (nnkiboze-possibly-change-newsgroups group)
125 (set-buffer nntp-server-buffer)
127 (insert-file-contents (nnkiboze-nov-file-name))
128 (if (zerop (buffer-size))
129 (insert (format "211 0 0 0 %s\n" group))
130 (goto-char (point-min))
131 (and (looking-at "[0-9]+") (setq beg (read (current-buffer))))
132 (goto-char (point-max))
133 (and (re-search-backward "^[0-9]" nil t)
134 (setq end (read (current-buffer))))
135 (setq total (count-lines (point-min) (point-max)))
137 (insert (format "211 %d %d %d %s\n" total beg end group))))))
140 (defun nnkiboze-close-group (group &optional server)
141 (nnkiboze-possibly-change-newsgroups group)
142 ;; Remove NOV lines of articles that are marked as read.
144 (let ((unreads gnus-newsgroup-unreads)
145 (unselected gnus-newsgroup-unselected))
146 (set-buffer (get-buffer-create "*nnkiboze work*"))
147 (buffer-disable-undo (current-buffer))
149 (let ((cur (current-buffer))
151 (insert-file-contents (nnkiboze-nov-file-name))
152 (goto-char (point-min))
153 (while (looking-at "[0-9]+")
154 (if (or (memq (setq article (read cur)) unreads)
155 (memq article unselected))
157 (delete-region (progn (beginning-of-line) (point))
158 (progn (forward-line 1) (point)))))
159 (write-file (nnkiboze-nov-file-name))
160 (kill-buffer (current-buffer)))))
161 (setq nnkiboze-current-group nil))
163 (defun nnkiboze-request-list (&optional server)
164 (setq nnkiboze-status-string "nnkiboze: LIST is not implemented.")
167 (defun nnkiboze-request-newgroups (date &optional server)
169 (setq nnkiboze-status-string "NEWGROUPS is not supported.")
172 (defun nnkiboze-request-list-newsgroups (&optional server)
173 (setq nnkiboze-status-string "nnkiboze: LIST NEWSGROUPS is not implemented.")
176 (fset 'nnkiboze-request-post 'nntp-request-post)
178 (fset 'nnkiboze-request-post-buffer 'nntp-request-post-buffer)
181 ;;; Internal functions.
183 (defun nnkiboze-possibly-change-newsgroups (group)
184 (setq nnkiboze-current-group group))
186 (defun nnkiboze-prefixed-name (group)
187 (gnus-group-prefixed-name group '(nnkiboze "")))
190 (defun nnkiboze-generate-groups ()
191 "Usage: emacs -batch -l nnkiboze -f nnkiboze-generate-groups
192 Finds out what articles are to be part of the nnkiboze groups."
194 (let ((nnmail-spool-file nil)
195 (gnus-use-dribble-file nil)
196 (gnus-read-active-file t)
197 (gnus-expert-user t))
199 (let* ((gnus-newsrc-alist (gnus-copy-sequence gnus-newsrc-alist))
200 (newsrc gnus-newsrc-alist))
202 (if (string-match "nnkiboze" (car (car newsrc)))
203 (nnkiboze-generate-group (car (car newsrc))))
204 (setq newsrc (cdr newsrc)))))
206 (defun nnkiboze-score-file (group)
207 (list (expand-file-name
208 (concat gnus-kill-files-directory nnkiboze-current-score-group
209 "." gnus-score-file-suffix))))
211 (defun nnkiboze-generate-group (group)
212 (let* ((info (nth 2 (gnus-gethash group gnus-newsrc-hashtb)))
213 (newsrc-file (concat nnkiboze-directory group ".newsrc"))
214 (nov-file (concat nnkiboze-directory group ".nov"))
215 (regexp (nth 1 (nth 4 info)))
217 (gnus-large-newsgroup nil)
218 (gnus-score-find-score-files-function 'nnkiboze-score-file)
219 method nnkiboze-newsrc nov-buffer gname newsrc active
221 (setq nnkiboze-current-score-group group)
222 (or info (error "No such group: %s" group))
223 (and (file-exists-p newsrc-file) (load newsrc-file))
225 (set-buffer (setq nov-buffer (find-file-noselect nov-file)))
226 (buffer-disable-undo (current-buffer)))
229 (if (and (string-match regexp (setq gname (symbol-name group)))
230 (not (assoc gname nnkiboze-newsrc)))
231 (setq nnkiboze-newsrc
232 (cons (cons gname (1- (car (symbol-value group))))
235 (setq newsrc nnkiboze-newsrc)
237 (if (not (setq active (gnus-gethash
238 (car (car newsrc)) gnus-active-hashtb)))
239 (setq nnkiboze-newsrc (delq (car newsrc) nnkiboze-newsrc))
240 (switch-to-buffer gnus-group-buffer)
241 (gnus-group-jump-to-group (car (car newsrc)))
242 (if (and (setq ginfo (nth 2 (gnus-gethash (gnus-group-group-name)
243 gnus-newsrc-hashtb)))
245 (setcar (nthcdr 3 ginfo) nil))
246 (if (not (and (or (not ginfo)
247 (> (length (gnus-list-of-unread-articles
250 (gnus-group-select-group nil)
251 (eq major-mode 'gnus-summary-mode))))
253 (setq lowest (cdr (car newsrc)))
254 (setq method (gnus-find-method-for-group gnus-newsgroup-name))
255 (and (eq method gnus-select-method) (setq method nil))
256 (while gnus-newsgroup-scored
257 (if (> (car (car gnus-newsgroup-scored)) lowest)
260 (gnus-get-header-by-number (car (car gnus-newsgroup-scored)))
262 (gnus-group-prefixed-name gnus-newsgroup-name method)
263 gnus-newsgroup-name)))
264 (setq gnus-newsgroup-scored (cdr gnus-newsgroup-scored)))
265 (gnus-summary-quit)))
266 (setcdr (car newsrc) (car active))
267 (setq newsrc (cdr newsrc)))
268 (set-buffer nov-buffer)
270 (kill-buffer (current-buffer))
271 (set-buffer (get-buffer-create "*nnkiboze work*"))
272 (buffer-disable-undo (current-buffer))
274 (insert "(setq nnkiboze-newsrc '" (prin1-to-string nnkiboze-newsrc)
276 (write-file newsrc-file)
277 (kill-buffer (current-buffer))
278 (switch-to-buffer gnus-group-buffer)
279 (gnus-group-list-groups 5 nil)))
281 (defun nnkiboze-enter-nov (buffer header group)
284 (goto-char (point-max))
285 (let ((xref (header-xref header))
286 (prefix (gnus-group-real-prefix group))
289 (if (zerop (forward-line -1))
291 (setq article (1+ (read (current-buffer))))
294 (insert (int-to-string article) "\t"
295 (or (header-subject header) "") "\t"
296 (or (header-from header) "") "\t"
297 (or (header-date header) "") "\t"
298 (or (header-id header) "") "\t"
299 (or (header-references header) "") "\t"
300 (int-to-string (or (header-chars header) 0)) "\t"
301 (int-to-string (or (header-lines header) 0)) "\t")
302 (if (or (not xref) (equal "" xref))
303 (insert "Xref " (system-name) " " group ":"
304 (int-to-string (header-number header))
306 (insert (header-xref header) "\t\n")
307 (search-backward "\t" nil t)
308 (search-backward "\t" nil t)
309 (while (re-search-forward
311 (save-excursion (end-of-line) (point)) t)
313 ;; The first xref has to be the group this article
314 ;; really came for - this is the article nnkiboze
315 ;; will to request when it is asked for the article.
317 (goto-char (match-beginning 0))
318 (insert prefix group ":"
319 (int-to-string (header-number header)) " ")
322 (goto-char (match-beginning 0))
323 (insert prefix)))))))
325 (defun nnkiboze-nov-file-name ()
326 (concat nnkiboze-directory
327 (nnkiboze-prefixed-name nnkiboze-current-group) ".nov"))
331 ;;; nnkiboze.el ends here