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eec82323 LMI |
1 | ;;; nneething.el --- random file access for Gnus |
2 | ;; Copyright (C) 1995,96,97 Free Software Foundation, Inc. | |
3 | ||
4 | ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no> | |
5 | ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet> | |
6 | ;; Keywords: news, mail | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
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) | |
13 | ;; any later version. | |
14 | ||
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. | |
19 | ||
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. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
27 | ;;; Code: | |
28 | ||
29 | (require 'nnheader) | |
30 | (require 'nnmail) | |
31 | (require 'nnoo) | |
32 | (require 'gnus-util) | |
33 | (require 'cl) | |
34 | ||
35 | (nnoo-declare nneething) | |
36 | ||
37 | (defvoo nneething-map-file-directory "~/.nneething/" | |
38 | "Where nneething stores the map files.") | |
39 | ||
40 | (defvoo nneething-map-file ".nneething" | |
41 | "Name of the map files.") | |
42 | ||
43 | (defvoo nneething-exclude-files nil | |
44 | "Regexp saying what files to exclude from the group. | |
45 | If this variable is nil, no files will be excluded.") | |
46 | ||
47 | \f | |
48 | ||
49 | ;;; Internal variables. | |
50 | ||
51 | (defconst nneething-version "nneething 1.0" | |
52 | "nneething version.") | |
53 | ||
54 | (defvoo nneething-current-directory nil | |
55 | "Current news group directory.") | |
56 | ||
57 | (defvoo nneething-status-string "") | |
58 | ||
59 | (defvoo nneething-message-id-number 0) | |
60 | (defvoo nneething-work-buffer " *nneething work*") | |
61 | ||
62 | (defvoo nneething-group nil) | |
63 | (defvoo nneething-map nil) | |
64 | (defvoo nneething-read-only nil) | |
65 | (defvoo nneething-active nil) | |
66 | ||
67 | \f | |
68 | ||
69 | ;;; Interface functions. | |
70 | ||
71 | (nnoo-define-basics nneething) | |
72 | ||
73 | (deffoo nneething-retrieve-headers (articles &optional group server fetch-old) | |
74 | (nneething-possibly-change-directory group) | |
75 | ||
76 | (save-excursion | |
77 | (set-buffer nntp-server-buffer) | |
78 | (erase-buffer) | |
79 | (let* ((number (length articles)) | |
80 | (count 0) | |
81 | (large (and (numberp nnmail-large-newsgroup) | |
82 | (> number nnmail-large-newsgroup))) | |
83 | article file) | |
84 | ||
85 | (if (stringp (car articles)) | |
86 | 'headers | |
87 | ||
88 | (while (setq article (pop articles)) | |
89 | (setq file (nneething-file-name article)) | |
90 | ||
91 | (when (and (file-exists-p file) | |
92 | (or (file-directory-p file) | |
93 | (not (zerop (nnheader-file-size file))))) | |
94 | (insert (format "221 %d Article retrieved.\n" article)) | |
95 | (nneething-insert-head file) | |
96 | (insert ".\n")) | |
97 | ||
98 | (incf count) | |
99 | ||
100 | (and large | |
101 | (zerop (% count 20)) | |
102 | (message "nneething: Receiving headers... %d%%" | |
103 | (/ (* count 100) number)))) | |
104 | ||
105 | (when large | |
106 | (message "nneething: Receiving headers...done")) | |
107 | ||
108 | (nnheader-fold-continuation-lines) | |
109 | 'headers)))) | |
110 | ||
111 | (deffoo nneething-request-article (id &optional group server buffer) | |
112 | (nneething-possibly-change-directory group) | |
113 | (let ((file (unless (stringp id) | |
114 | (nneething-file-name id))) | |
115 | (nntp-server-buffer (or buffer nntp-server-buffer))) | |
116 | (and (stringp file) ; We did not request by Message-ID. | |
117 | (file-exists-p file) ; The file exists. | |
118 | (not (file-directory-p file)) ; It's not a dir. | |
119 | (save-excursion | |
120 | (nnmail-find-file file) ; Insert the file in the nntp buf. | |
121 | (unless (nnheader-article-p) ; Either it's a real article... | |
122 | (goto-char (point-min)) | |
123 | (nneething-make-head file (current-buffer)) ; ... or we fake some headers. | |
124 | (insert "\n")) | |
125 | t)))) | |
126 | ||
127 | (deffoo nneething-request-group (group &optional server dont-check) | |
128 | (nneething-possibly-change-directory group server) | |
129 | (unless dont-check | |
130 | (nneething-create-mapping) | |
131 | (if (> (car nneething-active) (cdr nneething-active)) | |
132 | (nnheader-insert "211 0 1 0 %s\n" group) | |
133 | (nnheader-insert | |
134 | "211 %d %d %d %s\n" | |
135 | (- (1+ (cdr nneething-active)) (car nneething-active)) | |
136 | (car nneething-active) (cdr nneething-active) | |
137 | group))) | |
138 | t) | |
139 | ||
140 | (deffoo nneething-request-list (&optional server dir) | |
141 | (nnheader-report 'nneething "LIST is not implemented.")) | |
142 | ||
143 | (deffoo nneething-request-newgroups (date &optional server) | |
144 | (nnheader-report 'nneething "NEWSGROUPS is not implemented.")) | |
145 | ||
146 | (deffoo nneething-request-type (group &optional article) | |
147 | 'unknown) | |
148 | ||
149 | (deffoo nneething-close-group (group &optional server) | |
150 | (setq nneething-current-directory nil) | |
151 | t) | |
152 | ||
153 | (deffoo nneething-open-server (server &optional defs) | |
154 | (nnheader-init-server-buffer) | |
155 | (if (nneething-server-opened server) | |
156 | t | |
157 | (unless (assq 'nneething-directory defs) | |
158 | (setq defs (append defs (list (list 'nneething-directory server))))) | |
159 | (nnoo-change-server 'nneething server defs))) | |
160 | ||
161 | \f | |
162 | ;;; Internal functions. | |
163 | ||
164 | (defun nneething-possibly-change-directory (group &optional server) | |
165 | (when (and server | |
166 | (not (nneething-server-opened server))) | |
167 | (nneething-open-server server)) | |
168 | (when (and group | |
169 | (not (equal nneething-group group))) | |
170 | (setq nneething-group group) | |
171 | (setq nneething-map nil) | |
172 | (setq nneething-active (cons 1 0)) | |
173 | (nneething-create-mapping))) | |
174 | ||
175 | (defun nneething-map-file () | |
176 | ;; We make sure that the .nneething directory exists. | |
177 | (gnus-make-directory nneething-map-file-directory) | |
178 | ;; We store it in a special directory under the user's home dir. | |
179 | (concat (file-name-as-directory nneething-map-file-directory) | |
180 | nneething-group nneething-map-file)) | |
181 | ||
182 | (defun nneething-create-mapping () | |
183 | ;; Read nneething-active and nneething-map. | |
184 | (when (file-exists-p nneething-directory) | |
185 | (let ((map-file (nneething-map-file)) | |
186 | (files (directory-files nneething-directory)) | |
187 | touched map-files) | |
188 | (when (file-exists-p map-file) | |
189 | (ignore-errors | |
190 | (load map-file nil t t))) | |
191 | (unless nneething-active | |
192 | (setq nneething-active (cons 1 0))) | |
193 | ;; Old nneething had a different map format. | |
194 | (when (and (cdar nneething-map) | |
195 | (atom (cdar nneething-map))) | |
196 | (setq nneething-map | |
197 | (mapcar (lambda (n) | |
198 | (list (cdr n) (car n) | |
199 | (nth 5 (file-attributes | |
200 | (nneething-file-name (car n)))))) | |
201 | nneething-map))) | |
202 | ;; Remove files matching the exclusion regexp. | |
203 | (when nneething-exclude-files | |
204 | (let ((f files) | |
205 | prev) | |
206 | (while f | |
207 | (if (string-match nneething-exclude-files (car f)) | |
208 | (if prev (setcdr prev (cdr f)) | |
209 | (setq files (cdr files))) | |
210 | (setq prev f)) | |
211 | (setq f (cdr f))))) | |
212 | ;; Remove deleted files from the map. | |
213 | (let ((map nneething-map) | |
214 | prev) | |
215 | (while map | |
216 | (if (and (member (cadar map) files) | |
217 | ;; We also remove files that have changed mod times. | |
218 | (equal (nth 5 (file-attributes | |
219 | (nneething-file-name (cadar map)))) | |
220 | (caddar map))) | |
221 | (progn | |
222 | (push (cadar map) map-files) | |
223 | (setq prev map)) | |
224 | (setq touched t) | |
225 | (if prev | |
226 | (setcdr prev (cdr map)) | |
227 | (setq nneething-map (cdr nneething-map)))) | |
228 | (setq map (cdr map)))) | |
229 | ;; Find all new files and enter them into the map. | |
230 | (while files | |
231 | (unless (member (car files) map-files) | |
232 | ;; This file is not in the map, so we enter it. | |
233 | (setq touched t) | |
234 | (setcdr nneething-active (1+ (cdr nneething-active))) | |
235 | (push (list (cdr nneething-active) (car files) | |
236 | (nth 5 (file-attributes | |
237 | (nneething-file-name (car files))))) | |
238 | nneething-map)) | |
239 | (setq files (cdr files))) | |
240 | (when (and touched | |
241 | (not nneething-read-only)) | |
242 | (nnheader-temp-write map-file | |
243 | (insert "(setq nneething-map '") | |
244 | (gnus-prin1 nneething-map) | |
245 | (insert ")\n(setq nneething-active '") | |
246 | (gnus-prin1 nneething-active) | |
247 | (insert ")\n")))))) | |
248 | ||
249 | (defun nneething-insert-head (file) | |
250 | "Insert the head of FILE." | |
251 | (when (nneething-get-head file) | |
252 | (insert-buffer-substring nneething-work-buffer) | |
253 | (goto-char (point-max)))) | |
254 | ||
255 | (defun nneething-make-head (file &optional buffer) | |
256 | "Create a head by looking at the file attributes of FILE." | |
257 | (let ((atts (file-attributes file))) | |
258 | (insert | |
259 | "Subject: " (file-name-nondirectory file) "\n" | |
260 | "Message-ID: <nneething-" | |
261 | (int-to-string (incf nneething-message-id-number)) | |
262 | "@" (system-name) ">\n" | |
263 | (if (equal '(0 0) (nth 5 atts)) "" | |
264 | (concat "Date: " (current-time-string (nth 5 atts)) "\n")) | |
265 | (or (when buffer | |
266 | (save-excursion | |
267 | (set-buffer buffer) | |
268 | (when (re-search-forward "<[a-zA-Z0-9_]@[-a-zA-Z0-9_]>" 1000 t) | |
269 | (concat "From: " (match-string 0) "\n")))) | |
270 | (nneething-from-line (nth 2 atts) file)) | |
271 | (if (> (string-to-int (int-to-string (nth 7 atts))) 0) | |
272 | (concat "Chars: " (int-to-string (nth 7 atts)) "\n") | |
273 | "") | |
274 | (if buffer | |
275 | (save-excursion | |
276 | (set-buffer buffer) | |
277 | (concat "Lines: " (int-to-string | |
278 | (count-lines (point-min) (point-max))) | |
279 | "\n")) | |
280 | "") | |
281 | ))) | |
282 | ||
283 | (defun nneething-from-line (uid &optional file) | |
284 | "Return a From header based of UID." | |
285 | (let* ((login (condition-case nil | |
286 | (user-login-name uid) | |
287 | (error | |
288 | (cond ((= uid (user-uid)) (user-login-name)) | |
289 | ((zerop uid) "root") | |
290 | (t (int-to-string uid)))))) | |
291 | (name (condition-case nil | |
292 | (user-full-name uid) | |
293 | (error | |
294 | (cond ((= uid (user-uid)) (user-full-name)) | |
295 | ((zerop uid) "Ms. Root"))))) | |
296 | (host (if (string-match "\\`/[^/@]*@\\([^:/]+\\):" file) | |
297 | (prog1 | |
298 | (substring file | |
299 | (match-beginning 1) | |
300 | (match-end 1)) | |
301 | (when (string-match "/\\(users\\|home\\)/\\([^/]+\\)/" file) | |
302 | (setq login (substring file | |
303 | (match-beginning 2) | |
304 | (match-end 2)) | |
305 | name nil))) | |
306 | (system-name)))) | |
307 | (concat "From: " login "@" host | |
308 | (if name (concat " (" name ")") "") "\n"))) | |
309 | ||
310 | (defun nneething-get-head (file) | |
311 | "Either find the head in FILE or make a head for FILE." | |
312 | (save-excursion | |
313 | (set-buffer (get-buffer-create nneething-work-buffer)) | |
314 | (setq case-fold-search nil) | |
315 | (buffer-disable-undo (current-buffer)) | |
316 | (erase-buffer) | |
317 | (cond | |
318 | ((not (file-exists-p file)) | |
319 | ;; The file do not exist. | |
320 | nil) | |
321 | ((or (file-directory-p file) | |
322 | (file-symlink-p file)) | |
323 | ;; It's a dir, so we fudge a head. | |
324 | (nneething-make-head file) t) | |
325 | (t | |
326 | ;; We examine the file. | |
327 | (nnheader-insert-head file) | |
328 | (if (nnheader-article-p) | |
329 | (delete-region | |
330 | (progn | |
331 | (goto-char (point-min)) | |
332 | (or (and (search-forward "\n\n" nil t) | |
333 | (1- (point))) | |
334 | (point-max))) | |
335 | (point-max)) | |
336 | (goto-char (point-min)) | |
337 | (nneething-make-head file (current-buffer)) | |
338 | (delete-region (point) (point-max))) | |
339 | t)))) | |
340 | ||
341 | (defun nneething-file-name (article) | |
342 | "Return the file name of ARTICLE." | |
343 | (concat (file-name-as-directory nneething-directory) | |
344 | (if (numberp article) | |
345 | (cadr (assq article nneething-map)) | |
346 | article))) | |
347 | ||
348 | (provide 'nneething) | |
349 | ||
350 | ;;; nneething.el ends here |