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eec82323 | 1 | ;;; nnkiboze.el --- select virtual news access for Gnus |
16409b0b | 2 | |
ec4eb560 | 3 | ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000 |
16409b0b | 4 | ;; Free Software Foundation, Inc. |
eec82323 | 5 | |
6748645f | 6 | ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org> |
eec82323 LMI |
7 | ;; Keywords: news |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation; either version 2, or (at your option) | |
14 | ;; any later version. | |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
25 | ||
26 | ;;; Commentary: | |
27 | ||
28 | ;; The other access methods (nntp, nnspool, etc) are general news | |
29 | ;; access methods. This module relies on Gnus and can't be used | |
30 | ;; separately. | |
31 | ||
32 | ;;; Code: | |
33 | ||
34 | (require 'nntp) | |
35 | (require 'nnheader) | |
36 | (require 'gnus) | |
37 | (require 'gnus-score) | |
38 | (require 'nnoo) | |
8b93df01 | 39 | (require 'mm-util) |
eec82323 LMI |
40 | (eval-when-compile (require 'cl)) |
41 | ||
42 | (nnoo-declare nnkiboze) | |
43 | (defvoo nnkiboze-directory (nnheader-concat gnus-directory "kiboze/") | |
44 | "nnkiboze will put its files in this directory.") | |
45 | ||
46 | (defvoo nnkiboze-level 9 | |
47 | "The maximum level to be searched for articles.") | |
48 | ||
49 | (defvoo nnkiboze-remove-read-articles t | |
50 | "If non-nil, nnkiboze will remove read articles from the kiboze group.") | |
51 | ||
52 | (defvoo nnkiboze-ephemeral nil | |
53 | "If non-nil, don't store any data anywhere.") | |
54 | ||
55 | (defvoo nnkiboze-scores nil | |
56 | "Score rules for generating the nnkiboze group.") | |
57 | ||
58 | (defvoo nnkiboze-regexp nil | |
59 | "Regexp for matching component groups.") | |
60 | ||
8b93df01 DL |
61 | (defvoo nnkiboze-file-coding-system mm-text-coding-system |
62 | "Coding system for nnkiboze files.") | |
63 | ||
eec82323 LMI |
64 | \f |
65 | ||
66 | (defconst nnkiboze-version "nnkiboze 1.0") | |
67 | ||
68 | (defvoo nnkiboze-current-group nil) | |
69 | (defvoo nnkiboze-status-string "") | |
70 | ||
71 | (defvoo nnkiboze-headers nil) | |
72 | ||
73 | \f | |
74 | ||
75 | ;;; Interface functions. | |
76 | ||
77 | (nnoo-define-basics nnkiboze) | |
78 | ||
79 | (deffoo nnkiboze-retrieve-headers (articles &optional group server fetch-old) | |
80 | (nnkiboze-possibly-change-group group) | |
81 | (unless gnus-nov-is-evil | |
82 | (if (stringp (car articles)) | |
83 | 'headers | |
84 | (let ((nov (nnkiboze-nov-file-name))) | |
85 | (when (file-exists-p nov) | |
86 | (save-excursion | |
87 | (set-buffer nntp-server-buffer) | |
88 | (erase-buffer) | |
8b93df01 DL |
89 | (let ((nnheader-file-coding-system nnkiboze-file-coding-system)) |
90 | (nnheader-insert-file-contents nov)) | |
eec82323 LMI |
91 | (nnheader-nov-delete-outside-range |
92 | (car articles) (car (last articles))) | |
93 | 'nov)))))) | |
94 | ||
95 | (deffoo nnkiboze-request-article (article &optional newsgroup server buffer) | |
96 | (nnkiboze-possibly-change-group newsgroup) | |
97 | (if (not (numberp article)) | |
98 | ;; This is a real kludge. It might not work at times, but it | |
99 | ;; does no harm I think. The only alternative is to offer no | |
100 | ;; article fetching by message-id at all. | |
101 | (nntp-request-article article newsgroup gnus-nntp-server buffer) | |
102 | (let* ((header (gnus-summary-article-header article)) | |
ec4eb560 DL |
103 | (xref (mail-header-xref header)) |
104 | num group) | |
eec82323 LMI |
105 | (unless xref |
106 | (error "nnkiboze: No xref")) | |
107 | (unless (string-match " \\([^ ]+\\):\\([0-9]+\\)" xref) | |
108 | (error "nnkiboze: Malformed xref")) | |
ec4eb560 DL |
109 | (setq num (string-to-int (match-string 2 xref)) |
110 | group (match-string 1 xref)) | |
111 | (or (with-current-buffer buffer | |
112 | (gnus-cache-request-article num group)) | |
113 | (gnus-request-article num group buffer))))) | |
eec82323 LMI |
114 | |
115 | (deffoo nnkiboze-request-scan (&optional group server) | |
116 | (nnkiboze-generate-group (concat "nnkiboze:" group))) | |
117 | ||
118 | (deffoo nnkiboze-request-group (group &optional server dont-check) | |
119 | "Make GROUP the current newsgroup." | |
120 | (nnkiboze-possibly-change-group group) | |
121 | (if dont-check | |
122 | t | |
123 | (let ((nov-file (nnkiboze-nov-file-name)) | |
124 | beg end total) | |
125 | (save-excursion | |
126 | (set-buffer nntp-server-buffer) | |
127 | (erase-buffer) | |
6748645f LMI |
128 | (unless (file-exists-p nov-file) |
129 | (nnkiboze-request-scan group)) | |
eec82323 LMI |
130 | (if (not (file-exists-p nov-file)) |
131 | (nnheader-report 'nnkiboze "Can't select group %s" group) | |
8b93df01 DL |
132 | (let ((nnheader-file-coding-system nnkiboze-file-coding-system)) |
133 | (nnheader-insert-file-contents nov-file)) | |
eec82323 LMI |
134 | (if (zerop (buffer-size)) |
135 | (nnheader-insert "211 0 0 0 %s\n" group) | |
136 | (goto-char (point-min)) | |
137 | (when (looking-at "[0-9]+") | |
138 | (setq beg (read (current-buffer)))) | |
139 | (goto-char (point-max)) | |
140 | (when (re-search-backward "^[0-9]" nil t) | |
141 | (setq end (read (current-buffer)))) | |
142 | (setq total (count-lines (point-min) (point-max))) | |
143 | (nnheader-insert "211 %d %d %d %s\n" total beg end group))))))) | |
144 | ||
145 | (deffoo nnkiboze-close-group (group &optional server) | |
146 | (nnkiboze-possibly-change-group group) | |
147 | ;; Remove NOV lines of articles that are marked as read. | |
148 | (when (and (file-exists-p (nnkiboze-nov-file-name)) | |
149 | nnkiboze-remove-read-articles) | |
8b93df01 DL |
150 | (let ((coding-system-for-write nnkiboze-file-coding-system)) |
151 | (with-temp-file (nnkiboze-nov-file-name) | |
a1506d29 | 152 | (let ((cur (current-buffer)) |
8b93df01 DL |
153 | (nnheader-file-coding-system nnkiboze-file-coding-system)) |
154 | (nnheader-insert-file-contents (nnkiboze-nov-file-name)) | |
155 | (goto-char (point-min)) | |
156 | (while (not (eobp)) | |
157 | (if (not (gnus-article-read-p (read cur))) | |
158 | (forward-line 1) | |
159 | (gnus-delete-line)))))) | |
160 | (setq nnkiboze-current-group nil))) | |
eec82323 LMI |
161 | |
162 | (deffoo nnkiboze-open-server (server &optional defs) | |
163 | (unless (assq 'nnkiboze-regexp defs) | |
164 | (push `(nnkiboze-regexp ,server) | |
165 | defs)) | |
166 | (nnoo-change-server 'nnkiboze server defs)) | |
167 | ||
168 | (deffoo nnkiboze-request-delete-group (group &optional force server) | |
169 | (nnkiboze-possibly-change-group group) | |
170 | (when force | |
16409b0b GM |
171 | (let ((files (nconc |
172 | (nnkiboze-score-file group) | |
173 | (list (nnkiboze-nov-file-name) | |
174 | (nnkiboze-nov-file-name ".newsrc"))))) | |
175 | (while files | |
176 | (and (file-exists-p (car files)) | |
177 | (file-writable-p (car files)) | |
178 | (delete-file (car files))) | |
179 | (setq files (cdr files))))) | |
6748645f LMI |
180 | (setq nnkiboze-current-group nil) |
181 | t) | |
eec82323 LMI |
182 | |
183 | (nnoo-define-skeleton nnkiboze) | |
184 | ||
185 | \f | |
186 | ;;; Internal functions. | |
187 | ||
188 | (defun nnkiboze-possibly-change-group (group) | |
189 | (setq nnkiboze-current-group group)) | |
190 | ||
191 | (defun nnkiboze-prefixed-name (group) | |
192 | (gnus-group-prefixed-name group '(nnkiboze ""))) | |
193 | ||
194 | ;;;###autoload | |
195 | (defun nnkiboze-generate-groups () | |
6748645f | 196 | "\"Usage: emacs -batch -l nnkiboze -f nnkiboze-generate-groups\". |
eec82323 LMI |
197 | Finds out what articles are to be part of the nnkiboze groups." |
198 | (interactive) | |
199 | (let ((nnmail-spool-file nil) | |
16409b0b | 200 | (mail-sources nil) |
eec82323 LMI |
201 | (gnus-use-dribble-file nil) |
202 | (gnus-read-active-file t) | |
203 | (gnus-expert-user t)) | |
204 | (gnus)) | |
205 | (let* ((gnus-newsrc-alist (gnus-copy-sequence gnus-newsrc-alist)) | |
206 | (newsrc (cdr gnus-newsrc-alist)) | |
207 | gnus-newsrc-hashtb info) | |
208 | (gnus-make-hashtable-from-newsrc-alist) | |
209 | ;; We have copied all the newsrc alist info over to local copies | |
210 | ;; so that we can mess all we want with these lists. | |
211 | (while (setq info (pop newsrc)) | |
212 | (when (string-match "nnkiboze" (gnus-info-group info)) | |
213 | ;; For each kiboze group, we call this function to generate | |
214 | ;; it. | |
ec4eb560 DL |
215 | (nnkiboze-generate-group (gnus-info-group info) t)))) |
216 | (save-excursion | |
217 | (set-buffer gnus-group-buffer) | |
218 | (gnus-group-list-groups))) | |
eec82323 LMI |
219 | |
220 | (defun nnkiboze-score-file (group) | |
221 | (list (expand-file-name | |
222 | (concat (file-name-as-directory gnus-kill-files-directory) | |
223 | (nnheader-translate-file-chars | |
224 | (concat (nnkiboze-prefixed-name nnkiboze-current-group) | |
225 | "." gnus-score-file-suffix)))))) | |
226 | ||
ec4eb560 | 227 | (defun nnkiboze-generate-group (group &optional inhibit-list-groups) |
eec82323 | 228 | (let* ((info (nth 2 (gnus-gethash group gnus-newsrc-hashtb))) |
16409b0b | 229 | (newsrc-file (concat nnkiboze-directory |
a8151ef7 LMI |
230 | (nnheader-translate-file-chars |
231 | (concat group ".newsrc")))) | |
232 | (nov-file (concat nnkiboze-directory | |
233 | (nnheader-translate-file-chars | |
234 | (concat group ".nov")))) | |
eec82323 LMI |
235 | method nnkiboze-newsrc gname newsrc active |
236 | ginfo lowest glevel orig-info nov-buffer | |
237 | ;; Bind various things to nil to make group entry faster. | |
238 | (gnus-expert-user t) | |
239 | (gnus-large-newsgroup nil) | |
240 | (gnus-score-find-score-files-function 'nnkiboze-score-file) | |
ec4eb560 DL |
241 | ;; Use only nnkiboze-score-file! |
242 | (gnus-score-use-all-scores nil) | |
243 | (gnus-use-scoring t) | |
eec82323 LMI |
244 | (gnus-verbose (min gnus-verbose 3)) |
245 | gnus-select-group-hook gnus-summary-prepare-hook | |
246 | gnus-thread-sort-functions gnus-show-threads | |
6748645f | 247 | gnus-visual gnus-suppress-duplicates num-unread) |
eec82323 LMI |
248 | (unless info |
249 | (error "No such group: %s" group)) | |
250 | ;; Load the kiboze newsrc file for this group. | |
251 | (when (file-exists-p newsrc-file) | |
252 | (load newsrc-file)) | |
8b93df01 DL |
253 | (let ((coding-system-for-write nnkiboze-file-coding-system)) |
254 | (with-temp-file nov-file | |
255 | (when (file-exists-p nov-file) | |
256 | (insert-file-contents nov-file)) | |
257 | (setq nov-buffer (current-buffer)) | |
258 | ;; Go through the active hashtb and add new all groups that match the | |
259 | ;; kiboze regexp. | |
260 | (mapatoms | |
261 | (lambda (group) | |
262 | (and (string-match nnkiboze-regexp | |
263 | (setq gname (symbol-name group))) ; Match | |
264 | (not (assoc gname nnkiboze-newsrc)) ; It isn't registered | |
265 | (numberp (car (symbol-value group))) ; It is active | |
266 | (or (> nnkiboze-level 7) | |
267 | (and (setq glevel (nth 1 (nth 2 (gnus-gethash | |
268 | gname gnus-newsrc-hashtb)))) | |
269 | (>= nnkiboze-level glevel))) | |
270 | (not (string-match "^nnkiboze:" gname)) ; Exclude kibozes | |
271 | (push (cons gname (1- (car (symbol-value group)))) | |
272 | nnkiboze-newsrc))) | |
273 | gnus-active-hashtb) | |
274 | ;; `newsrc' is set to the list of groups that possibly are | |
275 | ;; component groups to this kiboze group. This list has elements | |
276 | ;; on the form `(GROUP . NUMBER)', where NUMBER is the highest | |
277 | ;; number that has been kibozed in GROUP in this kiboze group. | |
278 | (setq newsrc nnkiboze-newsrc) | |
279 | (while newsrc | |
280 | (if (not (setq active (gnus-gethash | |
281 | (caar newsrc) gnus-active-hashtb))) | |
282 | ;; This group isn't active after all, so we remove it from | |
283 | ;; the list of component groups. | |
284 | (setq nnkiboze-newsrc (delq (car newsrc) nnkiboze-newsrc)) | |
285 | (setq lowest (cdar newsrc)) | |
286 | ;; Ok, we have a valid component group, so we jump to it. | |
287 | (switch-to-buffer gnus-group-buffer) | |
288 | (gnus-group-jump-to-group (caar newsrc)) | |
289 | (gnus-message 3 "nnkiboze: Checking %s..." (caar newsrc)) | |
290 | (setq ginfo (gnus-get-info (gnus-group-group-name)) | |
291 | orig-info (gnus-copy-sequence ginfo) | |
292 | num-unread (car (gnus-gethash (caar newsrc) | |
293 | gnus-newsrc-hashtb))) | |
294 | (unwind-protect | |
295 | (progn | |
296 | ;; We set all list of article marks to nil. Since we operate | |
297 | ;; on copies of the real lists, we can destroy anything we | |
298 | ;; want here. | |
299 | (when (nth 3 ginfo) | |
300 | (setcar (nthcdr 3 ginfo) nil)) | |
301 | ;; We set the list of read articles to be what we expect for | |
302 | ;; this kiboze group -- either nil or `(1 . LOWEST)'. | |
303 | (when ginfo | |
304 | (setcar (nthcdr 2 ginfo) | |
305 | (and (not (= lowest 1)) (cons 1 lowest)))) | |
306 | (when (and (or (not ginfo) | |
307 | (> (length (gnus-list-of-unread-articles | |
308 | (car ginfo))) | |
309 | 0)) | |
310 | (progn | |
311 | (ignore-errors | |
312 | (gnus-group-select-group nil)) | |
313 | (eq major-mode 'gnus-summary-mode))) | |
314 | ;; We are now in the group where we want to be. | |
315 | (setq method (gnus-find-method-for-group | |
316 | gnus-newsgroup-name)) | |
317 | (when (eq method gnus-select-method) | |
318 | (setq method nil)) | |
319 | ;; We go through the list of scored articles. | |
320 | (while gnus-newsgroup-scored | |
321 | (when (> (caar gnus-newsgroup-scored) lowest) | |
322 | ;; If it has a good score, then we enter this article | |
323 | ;; into the kiboze group. | |
324 | (nnkiboze-enter-nov | |
325 | nov-buffer | |
326 | (gnus-summary-article-header | |
327 | (caar gnus-newsgroup-scored)) | |
328 | gnus-newsgroup-name)) | |
329 | (setq gnus-newsgroup-scored (cdr gnus-newsgroup-scored))) | |
330 | ;; That's it. We exit this group. | |
331 | (when (eq major-mode 'gnus-summary-mode) | |
332 | (kill-buffer (current-buffer))))) | |
333 | ;; Restore the proper info. | |
334 | (when ginfo | |
335 | (setcdr ginfo (cdr orig-info))) | |
336 | (setcar (gnus-gethash (caar newsrc) gnus-newsrc-hashtb) | |
337 | num-unread))) | |
338 | (setcdr (car newsrc) (car active)) | |
339 | (gnus-message 3 "nnkiboze: Checking %s...done" (caar newsrc)) | |
340 | (setq newsrc (cdr newsrc))))) | |
eec82323 | 341 | ;; We save the kiboze newsrc for this group. |
16409b0b | 342 | (with-temp-file newsrc-file |
eec82323 LMI |
343 | (insert "(setq nnkiboze-newsrc '") |
344 | (gnus-prin1 nnkiboze-newsrc) | |
6748645f | 345 | (insert ")\n"))) |
ec4eb560 DL |
346 | (unless inhibit-list-groups |
347 | (save-excursion | |
348 | (set-buffer gnus-group-buffer) | |
349 | (gnus-group-list-groups))) | |
6748645f | 350 | t) |
eec82323 LMI |
351 | |
352 | (defun nnkiboze-enter-nov (buffer header group) | |
353 | (save-excursion | |
354 | (set-buffer buffer) | |
355 | (goto-char (point-max)) | |
6748645f | 356 | (let ((prefix (gnus-group-real-prefix group)) |
eec82323 | 357 | (oheader (copy-sequence header)) |
eec82323 LMI |
358 | article) |
359 | (if (zerop (forward-line -1)) | |
360 | (progn | |
361 | (setq article (1+ (read (current-buffer)))) | |
362 | (forward-line 1)) | |
363 | (setq article 1)) | |
364 | (mail-header-set-number oheader article) | |
8b93df01 | 365 | (with-temp-buffer |
ec4eb560 | 366 | (insert (or (mail-header-xref oheader) "")) |
8b93df01 DL |
367 | (goto-char (point-min)) |
368 | (if (re-search-forward " [^ ]+:[0-9]+" nil t) | |
369 | (goto-char (match-beginning 0)) | |
ec4eb560 | 370 | (or (eobp) (forward-char 1))) |
8b93df01 DL |
371 | ;; The first Xref has to be the group this article |
372 | ;; really came for - this is the article nnkiboze | |
373 | ;; will request when it is asked for the article. | |
374 | (insert " " group ":" | |
375 | (int-to-string (mail-header-number header)) " ") | |
376 | (while (re-search-forward " [^ ]+:[0-9]+" nil t) | |
377 | (goto-char (1+ (match-beginning 0))) | |
378 | (insert prefix)) | |
379 | (mail-header-set-xref oheader (buffer-string))) | |
380 | (nnheader-insert-nov oheader)))) | |
eec82323 | 381 | |
6748645f | 382 | (defun nnkiboze-nov-file-name (&optional suffix) |
eec82323 LMI |
383 | (concat (file-name-as-directory nnkiboze-directory) |
384 | (nnheader-translate-file-chars | |
6748645f LMI |
385 | (concat (nnkiboze-prefixed-name nnkiboze-current-group) |
386 | (or suffix ".nov"))))) | |
eec82323 LMI |
387 | |
388 | (provide 'nnkiboze) | |
389 | ||
ab5796a9 | 390 | ;;; arch-tag: 66068271-bdc9-4801-bcde-779702e73a05 |
eec82323 | 391 | ;;; nnkiboze.el ends here |