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))
42 ;; Report failure to find w3 at load time if appropriate.
43 (eval '(require 'nnweb))
47 (defvoo nnwfm-directory (nnheader-concat gnus-directory "wfm/")
48 "Where nnwfm will save its files.")
50 (defvoo nnwfm-address ""
51 "The address of the Ultimate bulletin board.")
53 ;;; Internal variables
55 (defvar nnwfm-groups-alist nil)
56 (defvoo nnwfm-groups nil)
57 (defvoo nnwfm-headers nil)
58 (defvoo nnwfm-articles nil)
59 (defvar nnwfm-table-regexp
60 "postings.*editpost\\|forumdisplay\\|Forum[0-9]+/HTML\\|getbio")
62 ;;; Interface functions
64 (nnoo-define-basics nnwfm)
66 (deffoo nnwfm-retrieve-headers (articles &optional group server fetch-old)
67 (nnwfm-possibly-change-server group server)
68 (unless gnus-nov-is-evil
69 (let* ((last (car (last articles)))
72 (entry (assoc group nnwfm-groups))
74 (topics (nth 4 entry))
75 (mapping (nth 5 entry))
76 (old-total (or (nth 6 entry) 1))
77 (nnwfm-table-regexp "Thread.asp")
78 headers article subject score from date lines parent point
79 contents tinfo fetchers map elem a href garticles topic old-max
80 inc datel table string current-page total-contents pages
81 farticles forum-contents parse furl-fetched mmap farticle
82 thread-id tables hstuff bstuff time)
84 (while (and (setq article (car articles))
87 (or (> article (caar map))
88 (< (cadar map) (caar map))))
90 (when (setq mmap (car map))
93 (<= article (nth 1 mmap)))
94 ;; Do we already have a fetcher for this topic?
95 (if (setq elem (assq (nth 2 mmap) fetchers))
96 ;; Yes, so we just add the spec to the end.
97 (nconc elem (list (cons article
98 (+ (nth 3 mmap) (incf farticle)))))
99 ;; No, so we add a new one.
100 (push (list (nth 2 mmap)
102 (+ (nth 3 mmap) (incf farticle))))
105 (setq article (car articles)))))
106 ;; Now we have the mapping from/to Gnus/nnwfm article numbers,
107 ;; so we start fetching the topics that we need to satisfy the
111 (set-buffer nntp-server-buffer)
113 (setq nnwfm-articles nil)
114 (mm-with-unibyte-buffer
115 (dolist (elem fetchers)
117 (setq subject (nth 2 (assq (car elem) topics))
118 thread-id (nth 0 (assq (car elem) topics)))
120 (concat nnwfm-address
121 (format "Item.asp?GroupID=%d&ThreadID=%d" sid
123 (goto-char (point-min))
129 (w3-parse-buffer (current-buffer)))))))))
130 (setq tables (cdr (caddar (memq (assq 'div tables) tables))))
132 (dolist (table tables)
133 (when (eq (car table) 'table)
134 (setq table (caddar (caddar (caddr table)))
135 hstuff (delete ":link" (nnweb-text (car table)))
136 bstuff (car (caddar (cdr table)))
139 (setq time (nnwfm-date-to-time (nth 2 hstuff)))
140 (push (list from time bstuff) contents))))
141 (setq contents (nreverse contents))
142 (dolist (art (cdr elem))
143 (push (list (car art)
144 (nth (1- (cdr art)) contents)
148 (sort nnwfm-articles 'car-less-than-car))
149 ;; Now we have all the articles, conveniently in an alist
150 ;; where the key is the Gnus article number.
151 (dolist (articlef nnwfm-articles)
152 (setq article (nth 0 articlef)
153 contents (nth 1 articlef)
154 subject (nth 2 articlef))
155 (setq from (nth 0 contents)
156 date (message-make-date (nth 1 contents)))
160 (make-full-mail-header
163 (concat "<" (number-to-string sid) "%"
164 (number-to-string article)
167 (/ (length (mapconcat 'identity (nnweb-text (nth 2 contents)) ""))
171 (setq nnwfm-headers (sort headers 'car-less-than-car))
173 (set-buffer nntp-server-buffer)
174 (mm-with-unibyte-current-buffer
176 (dolist (header nnwfm-headers)
177 (nnheader-insert-nov (cdr header))))))
180 (deffoo nnwfm-request-group (group &optional server dont-check)
181 (nnwfm-possibly-change-server nil server)
182 (when (not nnwfm-groups)
183 (nnwfm-request-list))
185 (nnwfm-create-mapping group))
186 (let ((elem (assoc group nnwfm-groups)))
189 (nnheader-report 'nnwfm "Group does not exist"))
191 (nnheader-report 'nnwfm "Opened group %s" group)
193 "211 %d %d %d %s\n" (cadr elem) 1 (cadr elem)
194 (prin1-to-string group))))))
196 (deffoo nnwfm-request-close ()
197 (setq nnwfm-groups-alist nil
200 (deffoo nnwfm-request-article (article &optional group server buffer)
201 (nnwfm-possibly-change-server group server)
202 (let ((contents (cdr (assq article nnwfm-articles))))
203 (when (setq contents (nth 2 (car contents)))
205 (set-buffer (or buffer nntp-server-buffer))
207 (nnweb-insert-html contents)
208 (goto-char (point-min))
209 (insert "Content-Type: text/html\nMIME-Version: 1.0\n")
210 (let ((header (cdr (assq article nnwfm-headers))))
211 (mm-with-unibyte-current-buffer
212 (nnheader-insert-header header)))
213 (nnheader-report 'nnwfm "Fetched article %s" article)
214 (cons group article)))))
216 (deffoo nnwfm-request-list (&optional server)
217 (nnwfm-possibly-change-server nil server)
218 (mm-with-unibyte-buffer
220 (if (string-match "/$" nnwfm-address)
221 (concat nnwfm-address "Group.asp")
223 (let* ((nnwfm-table-regexp "Thread.asp")
224 (contents (w3-parse-buffer (current-buffer)))
225 sid elem description articles a href group forum
227 (dolist (row (cdr (nth 2 (car (nth 2 (nnwfm-find-forum-table
229 (setq row (nth 2 row))
230 (when (setq a (nnweb-parse-find 'a row))
231 (setq group (car (last (nnweb-text a)))
232 href (cdr (assq 'href (nth 1 a))))
233 (setq description (car (last (nnweb-text (nth 1 row)))))
236 (nnweb-replace-in-string
237 (car (last (nnweb-text (nth 3 row)))) "," "")))
239 (string-match "GroupId=\\([0-9]+\\)" href))
240 (setq forum (string-to-number (match-string 1 href)))
241 (if (setq elem (assoc group nnwfm-groups))
242 (setcar (cdr elem) articles)
243 (push (list group articles forum description nil nil nil nil)
246 (nnwfm-generate-active)
249 (deffoo nnwfm-request-newgroups (date &optional server)
250 (nnwfm-possibly-change-server nil server)
251 (nnwfm-generate-active)
254 (nnoo-define-skeleton nnwfm)
256 ;;; Internal functions
258 (defun nnwfm-new-threads-p (group time)
259 "See whether we want to fetch the threads for GROUP written before TIME."
260 (let ((old-time (nth 7 (assoc group nnwfm-groups))))
262 (time-less-p old-time time))))
264 (defun nnwfm-create-mapping (group)
265 (let* ((entry (assoc group nnwfm-groups))
267 (topics (nth 4 entry))
268 (mapping (nth 5 entry))
269 (old-total (or (nth 6 entry) 1))
270 (current-time (current-time))
271 (nnwfm-table-regexp "Thread.asp")
272 (furls (list (concat nnwfm-address
273 (format "Thread.asp?GroupId=%d" sid))))
275 contents forum-contents a subject href
276 garticles topic tinfo old-max inc parse elem date
278 (mm-with-unibyte-buffer
281 (push (car furls) fetched-urls)
282 (nnweb-insert (pop furls))
283 (goto-char (point-min))
284 (while (re-search-forward " wr(" nil t)
286 (setq elem (message-tokenize-header
287 (nnweb-replace-in-string
295 (string-to-number (nth 1 elem))
296 (nnweb-replace-in-string (nth 2 elem) "\"" "")
297 (string-to-number (nth 5 elem)))
299 (when (re-search-forward "href=\"\\(Thread.*DateLast=\\([^\"]+\\)\\)"
301 (setq url (match-string 1)
302 time (nnwfm-date-to-time (url-unhex-string (match-string 2))))
303 (when (and (nnwfm-new-threads-p group time)
307 (nnweb-decode-entities-string url)))
310 ;; The main idea here is to map Gnus article numbers to
311 ;; nnwfm article numbers. Say there are three topics in
312 ;; this forum, the first with 4 articles, the seconds with 2,
313 ;; and the third with 1. Then this will translate into 7 Gnus
314 ;; article numbers, where 1-4 comes from the first topic, 5-6
315 ;; from the second and 7 from the third. Now, then next time
316 ;; the group is entered, there's 2 new articles in topic one
317 ;; and 1 in topic three. Then Gnus article number 8-9 be 5-6
318 ;; in topic one and 10 will be the 2 in topic three.
319 (dolist (elem (nreverse forum-contents))
320 (setq subject (nth 1 elem)
322 garticles (nth 2 elem))
323 (if (setq tinfo (assq topic topics))
325 (setq old-max (cadr tinfo))
326 (setcar (cdr tinfo) garticles))
328 (push (list topic garticles subject) topics)
329 (setcar (nthcdr 4 entry) topics))
330 (when (not (= old-max garticles))
331 (setq inc (- garticles old-max))
332 (setq mapping (nconc mapping
335 old-total (1- (incf old-total inc))
336 topic (1+ old-max)))))
338 (setcar (nthcdr 5 entry) mapping)
339 (setcar (nthcdr 6 entry) old-total))))
340 (setcar (nthcdr 7 entry) current-time)
341 (setcar (nthcdr 1 entry) (1- old-total))
345 (defun nnwfm-possibly-change-server (&optional group server)
348 (not (nnwfm-server-opened server)))
349 (nnwfm-open-server server))
350 (unless nnwfm-groups-alist
352 (setq nnwfm-groups (cdr (assoc nnwfm-address
353 nnwfm-groups-alist)))))
355 (deffoo nnwfm-open-server (server &optional defs connectionless)
356 (nnheader-init-server-buffer)
357 (if (nnwfm-server-opened server)
359 (unless (assq 'nnwfm-address defs)
360 (setq defs (append defs (list (list 'nnwfm-address server)))))
361 (nnoo-change-server 'nnwfm server defs)))
363 (defun nnwfm-read-groups ()
364 (setq nnwfm-groups-alist nil)
365 (let ((file (expand-file-name "groups" nnwfm-directory)))
366 (when (file-exists-p file)
367 (mm-with-unibyte-buffer
368 (insert-file-contents file)
369 (goto-char (point-min))
370 (setq nnwfm-groups-alist (read (current-buffer)))))))
372 (defun nnwfm-write-groups ()
373 (setq nnwfm-groups-alist
374 (delq (assoc nnwfm-address nnwfm-groups-alist)
376 (push (cons nnwfm-address nnwfm-groups)
378 (with-temp-file (expand-file-name "groups" nnwfm-directory)
379 (prin1 nnwfm-groups-alist (current-buffer))))
381 (defun nnwfm-init (server)
382 "Initialize buffers and such."
383 (unless (file-exists-p nnwfm-directory)
384 (gnus-make-directory nnwfm-directory)))
386 (defun nnwfm-generate-active ()
388 (set-buffer nntp-server-buffer)
390 (dolist (elem nnwfm-groups)
391 (insert (prin1-to-string (car elem))
392 " " (number-to-string (cadr elem)) " 1 y\n"))))
394 (defun nnwfm-find-forum-table (contents)
396 (nnwfm-find-forum-table-1 contents)))
398 (defun nnwfm-find-forum-table-1 (contents)
399 (dolist (element contents)
400 (unless (stringp element)
401 (when (and (eq (car element) 'table)
402 (nnwfm-forum-table-p element))
403 (throw 'found element))
404 (when (nth 2 element)
405 (nnwfm-find-forum-table-1 (nth 2 element))))))
407 (defun nnwfm-forum-table-p (parse)
408 (when (not (apply 'gnus-or
411 (nnweb-parse-find 'table p))
413 (let ((href (cdr (assq 'href (nth 1 (nnweb-parse-find 'a parse 20)))))
415 (when (and href (string-match nnwfm-table-regexp href))
418 (defun nnwfm-date-to-time (date)
419 (let ((time (mapcar #'string-to-number (split-string date "[\\.\\+ :]"))))
420 (encode-time 0 (nth 4 time) (nth 3 time)
421 (nth 0 time) (nth 1 time)
422 (if (< (nth 2 time) 70)
423 (+ 2000 (nth 2 time))
424 (+ 1900 (nth 2 time))))))
429 ;; coding: iso-8859-1
432 ;;; nnwfm.el ends here