1 ;;; nneething.el --- random file access for Gnus
2 ;; Copyright (C) 1995,96 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
5 ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
6 ;; Keywords: news, mail
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
27 ;; Based on nnspool.el by Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>.
28 ;; For an overview of what the interface functions do, please see the
35 (eval-when-compile (require 'cl))
37 (defvar nneething-map-file-directory "~/.nneething/"
38 "*Map files directory.")
40 (defvar nneething-exclude-files nil
41 "*Regexp saying what files to exclude from the group.
42 If this variable is nil, no files will be excluded.")
44 (defvar nneething-map-file ".nneething"
45 "*Name of map files.")
49 (defconst nneething-version "nneething 1.0"
52 (defvar nneething-current-directory nil
53 "Current news group directory.")
55 (defvar nneething-status-string "")
56 (defvar nneething-group-alist nil)
60 (defvar nneething-directory nil)
61 (defvar nneething-group nil)
62 (defvar nneething-map nil)
63 (defvar nneething-read-only nil)
64 (defvar nneething-active nil)
65 (defvar nneething-server-variables
66 `((nneething-directory ,nneething-directory)
67 (nneething-current-directory nil)
68 (nneething-status-string "")
69 (nneething-group-alist)))
73 ;;; Interface functions.
75 (defun nneething-retrieve-headers (sequence &optional newsgroup server fetch-old)
76 (nneething-possibly-change-directory newsgroup)
79 (set-buffer nntp-server-buffer)
81 (let* ((number (length sequence))
83 (large (and (numberp nnmail-large-newsgroup)
84 (> number nnmail-large-newsgroup)))
87 (if (stringp (car sequence))
91 (setq article (car sequence))
92 (setq file (nneething-file-name article))
94 (if (and (file-exists-p file)
95 (or (file-directory-p file)
96 (not (zerop (nth 7 (file-attributes file))))))
98 (insert (format "221 %d Article retrieved.\n" article))
99 (nneething-insert-head file)
102 (setq sequence (cdr sequence)
107 (message "nneething: Receiving headers... %d%%"
108 (/ (* count 100) number))))
110 (and large (message "nneething: Receiving headers...done"))
112 ;; Fold continuation lines.
113 (goto-char (point-min))
114 (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t)
115 (replace-match " " t t))
118 (defun nneething-open-server (server &optional defs)
119 (setq nneething-status-string "")
120 (nnheader-init-server-buffer))
122 (defun nneething-close-server (&optional server)
125 (defun nneething-server-opened (&optional server)
128 (defun nneething-status-message (&optional server)
129 nneething-status-string)
131 (defun nneething-request-article (id &optional newsgroup server buffer)
132 (nneething-possibly-change-directory newsgroup)
133 (let ((file (if (stringp id) nil (nneething-file-name id)))
134 (nntp-server-buffer (or buffer nntp-server-buffer)))
135 (and (stringp file) ; We did not request by Message-ID.
136 (file-exists-p file) ; The file exists.
137 (not (file-directory-p file)) ; It's not a dir.
139 (nnmail-find-file file) ; Insert the file in the nntp buf.
140 (or (nnheader-article-p) ; Either it's a real article...
142 (goto-char (point-min))
143 (nneething-make-head file) ; ... or we fake some headers.
147 (defun nneething-request-group (group &optional dir dont-check)
148 (nneething-possibly-change-directory group dir)
149 (or dont-check (nneething-create-mapping))
151 (set-buffer nntp-server-buffer)
153 (if (> (car nneething-active) (cdr nneething-active))
154 (insert (format "211 0 1 0 %s\n" group))
155 (insert (format "211 %d %d %d %s\n"
156 (- (1+ (cdr nneething-active)) (car nneething-active))
157 (car nneething-active) (cdr nneething-active)
161 (defun nneething-request-list (&optional server dir)
163 (set-buffer nntp-server-buffer)
167 (defun nneething-request-newgroups (date &optional server)
169 (set-buffer nntp-server-buffer)
173 (defun nneething-request-post (&optional server)
174 (mail-send-and-exit nil))
176 (defun nneething-close-group (group &optional server)
180 ;;; Internal functions.
182 (defun nneething-possibly-change-directory (group &optional dir)
185 (if (and nneething-group
186 (string= group nneething-group))
189 (if (setq entry (assoc group nneething-group-alist))
191 (setq nneething-group group)
192 (setq nneething-directory (nth 1 entry))
193 (setq nneething-map (nth 2 entry))
194 (setq nneething-active (nth 3 entry)))
195 (setq nneething-group group)
196 (setq nneething-directory dir)
197 (setq nneething-map nil)
198 (setq nneething-active (cons 1 0))
199 (nneething-create-mapping)
200 (setq nneething-group-alist
201 (cons (list group dir nneething-map nneething-active)
202 nneething-group-alist)))))))
204 (defun nneething-map-file ()
205 ;; We make sure that the .nneething directory exists.
206 (or (file-exists-p nneething-map-file-directory)
207 (make-directory nneething-map-file-directory 'parents))
208 ;; We store it in a special directory under the user's home dir.
209 (concat (file-name-as-directory nneething-map-file-directory)
210 nneething-group nneething-map-file))
212 (defun nneething-create-mapping ()
213 ;; Read nneething-active and nneething-map.
214 (let ((map-file (nneething-map-file))
215 (files (directory-files nneething-directory))
217 (if (file-exists-p map-file)
219 (load map-file nil t t)
221 (or nneething-active (setq nneething-active (cons 1 0)))
222 ;; Old nneething had a different map format.
223 (when (and (cdr (car nneething-map))
224 (atom (cdar nneething-map)))
227 (list (cdr n) (car n)
228 (nth 5 (file-attributes
229 (nneething-file-name (car n))))))
231 ;; Remove files matching the exclusion regexp.
232 (when nneething-exclude-files
236 (if (string-match nneething-exclude-files (car f))
237 (if prev (setcdr prev (cdr f))
238 (setq files (cdr files)))
241 ;; Remove deleted files from the map.
242 (let ((map nneething-map)
245 (if (and (member (cadar map) files)
246 ;; We also remove files that have changed mod times.
247 (equal (nth 5 (file-attributes
248 (nneething-file-name (cadar map))))
251 (push (cadar map) map-files)
255 (setcdr prev (cdr map))
256 (setq nneething-map (cdr nneething-map))))
257 (setq map (cdr map))))
258 ;; Find all new files and enter them into the map.
260 (unless (member (car files) map-files)
261 ;; This file is not in the map, so we enter it.
263 (setcdr nneething-active (1+ (cdr nneething-active)))
264 (push (list (cdr nneething-active) (car files)
265 (nth 5 (file-attributes
266 (nneething-file-name (car files)))))
268 (setq files (cdr files)))
270 (not nneething-read-only))
272 (nnheader-set-temp-buffer " *nneething map*")
273 (insert "(setq nneething-map '" (prin1-to-string nneething-map) ")\n"
274 "(setq nneething-active '" (prin1-to-string nneething-active)
276 (write-region (point-min) (point-max) map-file nil 'nomesg)
277 (kill-buffer (current-buffer))))))
279 (defvar nneething-message-id-number 0)
280 (defvar nneething-work-buffer " *nneething work*")
282 (defun nneething-insert-head (file)
283 (and (nneething-get-head file)
284 (insert-buffer-substring nneething-work-buffer)))
286 (defun nneething-make-head (file)
287 (let ((atts (file-attributes file)))
288 (insert "Subject: " (file-name-nondirectory file) "\n"
289 "Message-ID: <nneething-"
291 (setq nneething-message-id-number
292 (1+ nneething-message-id-number)))
293 "@" (system-name) ">\n"
294 "Date: " (current-time-string (nth 5 atts)) "\n"
295 (nneething-from-line (nth 2 atts))
296 "Chars: " (int-to-string (nth 7 atts)) "\n")))
298 (defun nneething-from-line (uid)
299 (let ((login (condition-case nil
300 (user-login-name uid)
302 (cond ((= uid (user-uid)) (user-login-name))
304 (t (int-to-string uid))))))
305 (name (condition-case nil
308 (cond ((= uid (user-uid)) (user-full-name))
309 ((zerop uid) "Ms. Root"))))))
310 (concat "From: " login "@" (system-name)
311 (if name (concat " (" name ")") "") "\n")))
313 (defun nneething-get-head (file)
315 (set-buffer (get-buffer-create nneething-work-buffer))
316 (setq case-fold-search nil)
317 (buffer-disable-undo (current-buffer))
320 ((not (file-exists-p file))
321 ;; The file do not exist.
323 ((or (file-directory-p file)
324 (file-symlink-p file))
325 ;; It's a dir, so we fudge a head.
326 (nneething-make-head file) t)
328 ;; We examine the file.
329 (nnheader-insert-head file)
330 (if (nnheader-article-p)
333 (goto-char (point-min))
334 (or (and (search-forward "\n\n" nil t)
339 (nneething-make-head file))
342 (defun nneething-file-name (article)
343 (concat (file-name-as-directory nneething-directory)
344 (if (numberp article)
345 (cadr (assq article nneething-map))
350 ;;; nneething.el ends here