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))
41 (autoload 'w3-parse-buffer "w3-parse")
45 (defvoo nnwfm-directory (nnheader-concat gnus-directory "wfm/")
46 "Where nnwfm will save its files.")
48 (defvoo nnwfm-address ""
49 "The address of the Ultimate bulletin board.")
51 ;;; Internal variables
53 (defvar nnwfm-groups-alist nil)
54 (defvoo nnwfm-groups nil)
55 (defvoo nnwfm-headers nil)
56 (defvoo nnwfm-articles nil)
57 (defvar nnwfm-table-regexp
58 "postings.*editpost\\|forumdisplay\\|Forum[0-9]+/HTML\\|getbio")
60 ;;; Interface functions
62 (nnoo-define-basics nnwfm)
64 (deffoo nnwfm-retrieve-headers (articles &optional group server fetch-old)
65 (nnwfm-possibly-change-server group server)
66 (unless gnus-nov-is-evil
67 (let* ((last (car (last articles)))
70 (entry (assoc group nnwfm-groups))
72 (topics (nth 4 entry))
73 (mapping (nth 5 entry))
74 (old-total (or (nth 6 entry) 1))
75 (nnwfm-table-regexp "Thread.asp")
76 headers article subject score from date lines parent point
77 contents tinfo fetchers map elem a href garticles topic old-max
78 inc datel table string current-page total-contents pages
79 farticles forum-contents parse furl-fetched mmap farticle
80 thread-id tables hstuff bstuff time)
82 (while (and (setq article (car articles))
85 (or (> article (caar map))
86 (< (cadar map) (caar map))))
88 (when (setq mmap (car map))
91 (<= article (nth 1 mmap)))
92 ;; Do we already have a fetcher for this topic?
93 (if (setq elem (assq (nth 2 mmap) fetchers))
94 ;; Yes, so we just add the spec to the end.
95 (nconc elem (list (cons article
96 (+ (nth 3 mmap) (incf farticle)))))
97 ;; No, so we add a new one.
98 (push (list (nth 2 mmap)
100 (+ (nth 3 mmap) (incf farticle))))
103 (setq article (car articles)))))
104 ;; Now we have the mapping from/to Gnus/nnwfm article numbers,
105 ;; so we start fetching the topics that we need to satisfy the
109 (set-buffer nntp-server-buffer)
111 (setq nnwfm-articles nil)
112 (mm-with-unibyte-buffer
113 (dolist (elem fetchers)
115 (setq subject (nth 2 (assq (car elem) topics))
116 thread-id (nth 0 (assq (car elem) topics)))
118 (concat nnwfm-address
119 (format "Item.asp?GroupID=%d&ThreadID=%d" sid
121 (goto-char (point-min))
127 (w3-parse-buffer (current-buffer)))))))))
128 (setq tables (cdr (caddar (memq (assq 'div tables) tables))))
130 (dolist (table tables)
131 (when (eq (car table) 'table)
132 (setq table (caddar (caddar (caddr table)))
133 hstuff (delete ":link" (nnweb-text (car table)))
134 bstuff (car (caddar (cdr table)))
137 (setq time (nnwfm-date-to-time (nth 2 hstuff)))
138 (push (list from time bstuff) contents))))
139 (setq contents (nreverse contents))
140 (dolist (art (cdr elem))
141 (push (list (car art)
142 (nth (1- (cdr art)) contents)
146 (sort nnwfm-articles 'car-less-than-car))
147 ;; Now we have all the articles, conveniently in an alist
148 ;; where the key is the Gnus article number.
149 (dolist (articlef nnwfm-articles)
150 (setq article (nth 0 articlef)
151 contents (nth 1 articlef)
152 subject (nth 2 articlef))
153 (setq from (nth 0 contents)
154 date (message-make-date (nth 1 contents)))
158 (make-full-mail-header
161 (concat "<" (number-to-string sid) "%"
162 (number-to-string article)
165 (/ (length (mapconcat 'identity (nnweb-text (nth 2 contents)) ""))
169 (setq nnwfm-headers (sort headers 'car-less-than-car))
171 (set-buffer nntp-server-buffer)
172 (mm-with-unibyte-current-buffer
174 (dolist (header nnwfm-headers)
175 (nnheader-insert-nov (cdr header))))))
178 (deffoo nnwfm-request-group (group &optional server dont-check)
179 (nnwfm-possibly-change-server nil server)
180 (when (not nnwfm-groups)
181 (nnwfm-request-list))
183 (nnwfm-create-mapping group))
184 (let ((elem (assoc group nnwfm-groups)))
187 (nnheader-report 'nnwfm "Group does not exist"))
189 (nnheader-report 'nnwfm "Opened group %s" group)
191 "211 %d %d %d %s\n" (cadr elem) 1 (cadr elem)
192 (prin1-to-string group))))))
194 (deffoo nnwfm-request-close ()
195 (setq nnwfm-groups-alist nil
198 (deffoo nnwfm-request-article (article &optional group server buffer)
199 (nnwfm-possibly-change-server group server)
200 (let ((contents (cdr (assq article nnwfm-articles))))
201 (when (setq contents (nth 2 (car contents)))
203 (set-buffer (or buffer nntp-server-buffer))
205 (nnweb-insert-html contents)
206 (goto-char (point-min))
207 (insert "Content-Type: text/html\nMIME-Version: 1.0\n")
208 (let ((header (cdr (assq article nnwfm-headers))))
209 (mm-with-unibyte-current-buffer
210 (nnheader-insert-header header)))
211 (nnheader-report 'nnwfm "Fetched article %s" article)
212 (cons group article)))))
214 (deffoo nnwfm-request-list (&optional server)
215 (nnwfm-possibly-change-server nil server)
216 (mm-with-unibyte-buffer
218 (if (string-match "/$" nnwfm-address)
219 (concat nnwfm-address "Group.asp")
221 (let* ((nnwfm-table-regexp "Thread.asp")
222 (contents (w3-parse-buffer (current-buffer)))
223 sid elem description articles a href group forum
225 (dolist (row (cdr (nth 2 (car (nth 2 (nnwfm-find-forum-table
227 (setq row (nth 2 row))
228 (when (setq a (nnweb-parse-find 'a row))
229 (setq group (car (last (nnweb-text a)))
230 href (cdr (assq 'href (nth 1 a))))
231 (setq description (car (last (nnweb-text (nth 1 row)))))
234 (gnus-replace-in-string
235 (car (last (nnweb-text (nth 3 row)))) "," "")))
237 (string-match "GroupId=\\([0-9]+\\)" href))
238 (setq forum (string-to-number (match-string 1 href)))
239 (if (setq elem (assoc group nnwfm-groups))
240 (setcar (cdr elem) articles)
241 (push (list group articles forum description nil nil nil nil)
244 (nnwfm-generate-active)
247 (deffoo nnwfm-request-newgroups (date &optional server)
248 (nnwfm-possibly-change-server nil server)
249 (nnwfm-generate-active)
252 (nnoo-define-skeleton nnwfm)
254 ;;; Internal functions
256 (defun nnwfm-new-threads-p (group time)
257 "See whether we want to fetch the threads for GROUP written before TIME."
258 (let ((old-time (nth 7 (assoc group nnwfm-groups))))
260 (time-less-p old-time time))))
262 (defun nnwfm-create-mapping (group)
263 (let* ((entry (assoc group nnwfm-groups))
265 (topics (nth 4 entry))
266 (mapping (nth 5 entry))
267 (old-total (or (nth 6 entry) 1))
268 (current-time (current-time))
269 (nnwfm-table-regexp "Thread.asp")
270 (furls (list (concat nnwfm-address
271 (format "Thread.asp?GroupId=%d" sid))))
273 contents forum-contents a subject href
274 garticles topic tinfo old-max inc parse elem date
276 (mm-with-unibyte-buffer
279 (push (car furls) fetched-urls)
280 (mm-url-insert (pop furls))
281 (goto-char (point-min))
282 (while (re-search-forward " wr(" nil t)
284 (setq elem (message-tokenize-header
285 (gnus-replace-in-string
293 (string-to-number (nth 1 elem))
294 (gnus-replace-in-string (nth 2 elem) "\"" "")
295 (string-to-number (nth 5 elem)))
297 (when (re-search-forward "href=\"\\(Thread.*DateLast=\\([^\"]+\\)\\)"
299 (setq url (match-string 1)
300 time (nnwfm-date-to-time (gnus-url-unhex-string
302 (when (and (nnwfm-new-threads-p group time)
306 (mm-url-decode-entities-string url)))
309 ;; The main idea here is to map Gnus article numbers to
310 ;; nnwfm article numbers. Say there are three topics in
311 ;; this forum, the first with 4 articles, the seconds with 2,
312 ;; and the third with 1. Then this will translate into 7 Gnus
313 ;; article numbers, where 1-4 comes from the first topic, 5-6
314 ;; from the second and 7 from the third. Now, then next time
315 ;; the group is entered, there's 2 new articles in topic one
316 ;; and 1 in topic three. Then Gnus article number 8-9 be 5-6
317 ;; in topic one and 10 will be the 2 in topic three.
318 (dolist (elem (nreverse forum-contents))
319 (setq subject (nth 1 elem)
321 garticles (nth 2 elem))
322 (if (setq tinfo (assq topic topics))
324 (setq old-max (cadr tinfo))
325 (setcar (cdr tinfo) garticles))
327 (push (list topic garticles subject) topics)
328 (setcar (nthcdr 4 entry) topics))
329 (when (not (= old-max garticles))
330 (setq inc (- garticles old-max))
331 (setq mapping (nconc mapping
334 old-total (1- (incf old-total inc))
335 topic (1+ old-max)))))
337 (setcar (nthcdr 5 entry) mapping)
338 (setcar (nthcdr 6 entry) old-total))))
339 (setcar (nthcdr 7 entry) current-time)
340 (setcar (nthcdr 1 entry) (1- old-total))
344 (defun nnwfm-possibly-change-server (&optional group server)
347 (not (nnwfm-server-opened server)))
348 (nnwfm-open-server server))
349 (unless nnwfm-groups-alist
351 (setq nnwfm-groups (cdr (assoc nnwfm-address
352 nnwfm-groups-alist)))))
354 (deffoo nnwfm-open-server (server &optional defs connectionless)
355 (nnheader-init-server-buffer)
356 (if (nnwfm-server-opened server)
358 (unless (assq 'nnwfm-address defs)
359 (setq defs (append defs (list (list 'nnwfm-address server)))))
360 (nnoo-change-server 'nnwfm server defs)))
362 (defun nnwfm-read-groups ()
363 (setq nnwfm-groups-alist nil)
364 (let ((file (expand-file-name "groups" nnwfm-directory)))
365 (when (file-exists-p file)
366 (mm-with-unibyte-buffer
367 (insert-file-contents file)
368 (goto-char (point-min))
369 (setq nnwfm-groups-alist (read (current-buffer)))))))
371 (defun nnwfm-write-groups ()
372 (setq nnwfm-groups-alist
373 (delq (assoc nnwfm-address nnwfm-groups-alist)
375 (push (cons nnwfm-address nnwfm-groups)
377 (with-temp-file (expand-file-name "groups" nnwfm-directory)
378 (prin1 nnwfm-groups-alist (current-buffer))))
380 (defun nnwfm-init (server)
381 "Initialize buffers and such."
382 (unless (file-exists-p nnwfm-directory)
383 (gnus-make-directory nnwfm-directory)))
385 (defun nnwfm-generate-active ()
387 (set-buffer nntp-server-buffer)
389 (dolist (elem nnwfm-groups)
390 (insert (prin1-to-string (car elem))
391 " " (number-to-string (cadr elem)) " 1 y\n"))))
393 (defun nnwfm-find-forum-table (contents)
395 (nnwfm-find-forum-table-1 contents)))
397 (defun nnwfm-find-forum-table-1 (contents)
398 (dolist (element contents)
399 (unless (stringp element)
400 (when (and (eq (car element) 'table)
401 (nnwfm-forum-table-p element))
402 (throw 'found element))
403 (when (nth 2 element)
404 (nnwfm-find-forum-table-1 (nth 2 element))))))
406 (defun nnwfm-forum-table-p (parse)
407 (when (not (apply 'gnus-or
410 (nnweb-parse-find 'table p))
412 (let ((href (cdr (assq 'href (nth 1 (nnweb-parse-find 'a parse 20)))))
414 (when (and href (string-match nnwfm-table-regexp href))
417 (defun nnwfm-date-to-time (date)
418 (let ((time (mapcar #'string-to-number (split-string date "[\\.\\+ :]"))))
419 (encode-time 0 (nth 4 time) (nth 3 time)
420 (nth 0 time) (nth 1 time)
421 (if (< (nth 2 time) 70)
422 (+ 2000 (nth 2 time))
423 (+ 1900 (nth 2 time))))))
428 ;; coding: iso-8859-1
431 ;;; nnwfm.el ends here