1 ;;; nnwfm.el --- interfacing with a web forum
2 ;; Copyright (C) 2000 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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 the
21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 ;; Boston, MA 02111-1307, USA.
26 ;; Note: You need to have `url' and `w3' installed for this
31 (eval-when-compile (require 'cl))
32 (eval-when-compile (require 'gnus-clfns))
43 ;; Report failure to find w3 at load time if appropriate.
44 (eval '(require 'nnweb))
48 (defvoo nnwfm-directory (nnheader-concat gnus-directory "wfm/")
49 "Where nnwfm will save its files.")
51 (defvoo nnwfm-address ""
52 "The address of the Ultimate bulletin board.")
54 ;;; Internal variables
56 (defvar nnwfm-groups-alist nil)
57 (defvoo nnwfm-groups nil)
58 (defvoo nnwfm-headers nil)
59 (defvoo nnwfm-articles nil)
60 (defvar nnwfm-table-regexp
61 "postings.*editpost\\|forumdisplay\\|Forum[0-9]+/HTML\\|getbio")
63 ;;; Interface functions
65 (nnoo-define-basics nnwfm)
67 (deffoo nnwfm-retrieve-headers (articles &optional group server fetch-old)
68 (nnwfm-possibly-change-server group server)
69 (unless gnus-nov-is-evil
70 (let* ((last (car (last articles)))
73 (entry (assoc group nnwfm-groups))
75 (topics (nth 4 entry))
76 (mapping (nth 5 entry))
77 (old-total (or (nth 6 entry) 1))
78 (nnwfm-table-regexp "Thread.asp")
79 headers article subject score from date lines parent point
80 contents tinfo fetchers map elem a href garticles topic old-max
81 inc datel table string current-page total-contents pages
82 farticles forum-contents parse furl-fetched mmap farticle
83 thread-id tables hstuff bstuff time)
85 (while (and (setq article (car articles))
88 (or (> article (caar map))
89 (< (cadar map) (caar map))))
91 (when (setq mmap (car map))
94 (<= article (nth 1 mmap)))
95 ;; Do we already have a fetcher for this topic?
96 (if (setq elem (assq (nth 2 mmap) fetchers))
97 ;; Yes, so we just add the spec to the end.
98 (nconc elem (list (cons article
99 (+ (nth 3 mmap) (incf farticle)))))
100 ;; No, so we add a new one.
101 (push (list (nth 2 mmap)
103 (+ (nth 3 mmap) (incf farticle))))
106 (setq article (car articles)))))
107 ;; Now we have the mapping from/to Gnus/nnwfm article numbers,
108 ;; so we start fetching the topics that we need to satisfy the
112 (set-buffer nntp-server-buffer)
114 (setq nnwfm-articles nil)
115 (mm-with-unibyte-buffer
116 (dolist (elem fetchers)
118 (setq subject (nth 2 (assq (car elem) topics))
119 thread-id (nth 0 (assq (car elem) topics)))
121 (concat nnwfm-address
122 (format "Item.asp?GroupID=%d&ThreadID=%d" sid
124 (goto-char (point-min))
130 (w3-parse-buffer (current-buffer)))))))))
131 (setq tables (cdr (caddar (memq (assq 'div tables) tables))))
133 (dolist (table tables)
134 (when (eq (car table) 'table)
135 (setq table (caddar (caddar (caddr table)))
136 hstuff (delete ":link" (nnweb-text (car table)))
137 bstuff (car (caddar (cdr table)))
140 (setq time (nnwfm-date-to-time (nth 2 hstuff)))
141 (push (list from time bstuff) contents))))
142 (setq contents (nreverse contents))
143 (dolist (art (cdr elem))
144 (push (list (car art)
145 (nth (1- (cdr art)) contents)
149 (sort nnwfm-articles 'car-less-than-car))
150 ;; Now we have all the articles, conveniently in an alist
151 ;; where the key is the Gnus article number.
152 (dolist (articlef nnwfm-articles)
153 (setq article (nth 0 articlef)
154 contents (nth 1 articlef)
155 subject (nth 2 articlef))
156 (setq from (nth 0 contents)
157 date (message-make-date (nth 1 contents)))
161 (make-full-mail-header
164 (concat "<" (number-to-string sid) "%"
165 (number-to-string article)
168 (/ (length (mapconcat 'identity (nnweb-text (nth 2 contents)) ""))
172 (setq nnwfm-headers (sort headers 'car-less-than-car))
174 (set-buffer nntp-server-buffer)
175 (mm-with-unibyte-current-buffer
177 (dolist (header nnwfm-headers)
178 (nnheader-insert-nov (cdr header))))))
181 (deffoo nnwfm-request-group (group &optional server dont-check)
182 (nnwfm-possibly-change-server nil server)
183 (when (not nnwfm-groups)
184 (nnwfm-request-list))
186 (nnwfm-create-mapping group))
187 (let ((elem (assoc group nnwfm-groups)))
190 (nnheader-report 'nnwfm "Group does not exist"))
192 (nnheader-report 'nnwfm "Opened group %s" group)
194 "211 %d %d %d %s\n" (cadr elem) 1 (cadr elem)
195 (prin1-to-string group))))))
197 (deffoo nnwfm-request-close ()
198 (setq nnwfm-groups-alist nil
201 (deffoo nnwfm-request-article (article &optional group server buffer)
202 (nnwfm-possibly-change-server group server)
203 (let ((contents (cdr (assq article nnwfm-articles))))
204 (when (setq contents (nth 2 (car contents)))
206 (set-buffer (or buffer nntp-server-buffer))
208 (nnweb-insert-html contents)
209 (goto-char (point-min))
210 (insert "Content-Type: text/html\nMIME-Version: 1.0\n")
211 (let ((header (cdr (assq article nnwfm-headers))))
212 (mm-with-unibyte-current-buffer
213 (nnheader-insert-header header)))
214 (nnheader-report 'nnwfm "Fetched article %s" article)
215 (cons group article)))))
217 (deffoo nnwfm-request-list (&optional server)
218 (nnwfm-possibly-change-server nil server)
219 (mm-with-unibyte-buffer
221 (if (string-match "/$" nnwfm-address)
222 (concat nnwfm-address "Group.asp")
224 (let* ((nnwfm-table-regexp "Thread.asp")
225 (contents (w3-parse-buffer (current-buffer)))
226 sid elem description articles a href group forum
228 (dolist (row (cdr (nth 2 (car (nth 2 (nnwfm-find-forum-table
230 (setq row (nth 2 row))
231 (when (setq a (nnweb-parse-find 'a row))
232 (setq group (car (last (nnweb-text a)))
233 href (cdr (assq 'href (nth 1 a))))
234 (setq description (car (last (nnweb-text (nth 1 row)))))
237 (nnweb-replace-in-string
238 (car (last (nnweb-text (nth 3 row)))) "," "")))
240 (string-match "GroupId=\\([0-9]+\\)" href))
241 (setq forum (string-to-number (match-string 1 href)))
242 (if (setq elem (assoc group nnwfm-groups))
243 (setcar (cdr elem) articles)
244 (push (list group articles forum description nil nil nil nil)
247 (nnwfm-generate-active)
250 (deffoo nnwfm-request-newgroups (date &optional server)
251 (nnwfm-possibly-change-server nil server)
252 (nnwfm-generate-active)
255 (nnoo-define-skeleton nnwfm)
257 ;;; Internal functions
259 (defun nnwfm-new-threads-p (group time)
260 "See whether we want to fetch the threads for GROUP written before TIME."
261 (let ((old-time (nth 7 (assoc group nnwfm-groups))))
263 (time-less-p old-time time))))
265 (defun nnwfm-create-mapping (group)
266 (let* ((entry (assoc group nnwfm-groups))
268 (topics (nth 4 entry))
269 (mapping (nth 5 entry))
270 (old-total (or (nth 6 entry) 1))
271 (current-time (current-time))
272 (nnwfm-table-regexp "Thread.asp")
273 (furls (list (concat nnwfm-address
274 (format "Thread.asp?GroupId=%d" sid))))
276 contents forum-contents a subject href
277 garticles topic tinfo old-max inc parse elem date
279 (mm-with-unibyte-buffer
282 (push (car furls) fetched-urls)
283 (nnweb-insert (pop furls))
284 (goto-char (point-min))
285 (while (re-search-forward " wr(" nil t)
287 (setq elem (message-tokenize-header
288 (nnweb-replace-in-string
296 (string-to-number (nth 1 elem))
297 (nnweb-replace-in-string (nth 2 elem) "\"" "")
298 (string-to-number (nth 5 elem)))
300 (when (re-search-forward "href=\"\\(Thread.*DateLast=\\([^\"]+\\)\\)"
302 (setq url (match-string 1)
303 time (nnwfm-date-to-time (url-unhex-string (match-string 2))))
304 (when (and (nnwfm-new-threads-p group time)
308 (nnweb-decode-entities-string url)))
311 ;; The main idea here is to map Gnus article numbers to
312 ;; nnwfm article numbers. Say there are three topics in
313 ;; this forum, the first with 4 articles, the seconds with 2,
314 ;; and the third with 1. Then this will translate into 7 Gnus
315 ;; article numbers, where 1-4 comes from the first topic, 5-6
316 ;; from the second and 7 from the third. Now, then next time
317 ;; the group is entered, there's 2 new articles in topic one
318 ;; and 1 in topic three. Then Gnus article number 8-9 be 5-6
319 ;; in topic one and 10 will be the 2 in topic three.
320 (dolist (elem (nreverse forum-contents))
321 (setq subject (nth 1 elem)
323 garticles (nth 2 elem))
324 (if (setq tinfo (assq topic topics))
326 (setq old-max (cadr tinfo))
327 (setcar (cdr tinfo) garticles))
329 (push (list topic garticles subject) topics)
330 (setcar (nthcdr 4 entry) topics))
331 (when (not (= old-max garticles))
332 (setq inc (- garticles old-max))
333 (setq mapping (nconc mapping
336 old-total (1- (incf old-total inc))
337 topic (1+ old-max)))))
339 (setcar (nthcdr 5 entry) mapping)
340 (setcar (nthcdr 6 entry) old-total))))
341 (setcar (nthcdr 7 entry) current-time)
342 (setcar (nthcdr 1 entry) (1- old-total))
346 (defun nnwfm-possibly-change-server (&optional group server)
349 (not (nnwfm-server-opened server)))
350 (nnwfm-open-server server))
351 (unless nnwfm-groups-alist
353 (setq nnwfm-groups (cdr (assoc nnwfm-address
354 nnwfm-groups-alist)))))
356 (deffoo nnwfm-open-server (server &optional defs connectionless)
357 (nnheader-init-server-buffer)
358 (if (nnwfm-server-opened server)
360 (unless (assq 'nnwfm-address defs)
361 (setq defs (append defs (list (list 'nnwfm-address server)))))
362 (nnoo-change-server 'nnwfm server defs)))
364 (defun nnwfm-read-groups ()
365 (setq nnwfm-groups-alist nil)
366 (let ((file (expand-file-name "groups" nnwfm-directory)))
367 (when (file-exists-p file)
368 (mm-with-unibyte-buffer
369 (insert-file-contents file)
370 (goto-char (point-min))
371 (setq nnwfm-groups-alist (read (current-buffer)))))))
373 (defun nnwfm-write-groups ()
374 (setq nnwfm-groups-alist
375 (delq (assoc nnwfm-address nnwfm-groups-alist)
377 (push (cons nnwfm-address nnwfm-groups)
379 (with-temp-file (expand-file-name "groups" nnwfm-directory)
380 (prin1 nnwfm-groups-alist (current-buffer))))
382 (defun nnwfm-init (server)
383 "Initialize buffers and such."
384 (unless (file-exists-p nnwfm-directory)
385 (gnus-make-directory nnwfm-directory)))
387 (defun nnwfm-generate-active ()
389 (set-buffer nntp-server-buffer)
391 (dolist (elem nnwfm-groups)
392 (insert (prin1-to-string (car elem))
393 " " (number-to-string (cadr elem)) " 1 y\n"))))
395 (defun nnwfm-find-forum-table (contents)
397 (nnwfm-find-forum-table-1 contents)))
399 (defun nnwfm-find-forum-table-1 (contents)
400 (dolist (element contents)
401 (unless (stringp element)
402 (when (and (eq (car element) 'table)
403 (nnwfm-forum-table-p element))
404 (throw 'found element))
405 (when (nth 2 element)
406 (nnwfm-find-forum-table-1 (nth 2 element))))))
408 (defun nnwfm-forum-table-p (parse)
409 (when (not (apply 'gnus-or
412 (nnweb-parse-find 'table p))
414 (let ((href (cdr (assq 'href (nth 1 (nnweb-parse-find 'a parse 20)))))
416 (when (and href (string-match nnwfm-table-regexp href))
419 (defun nnwfm-date-to-time (date)
420 (let ((time (mapcar #'string-to-number (split-string date "[\\.\\+ :]"))))
421 (encode-time 0 (nth 4 time) (nth 3 time)
422 (nth 0 time) (nth 1 time)
423 (if (< (nth 2 time) 70)
424 (+ 2000 (nth 2 time))
425 (+ 1900 (nth 2 time))))))
430 ;; coding: iso-8859-1
433 ;;; nnwfm.el ends here