--- /dev/null
+;;; nnultimate.el --- interfacing with the Ultimate Bulletin Board
+;; Copyright (C) 1999 Free Software Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
+;; Keywords: news
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; Note: You need to have `url' and `w3' installed for this
+;; backend to work.
+
+;;; Code:
+
+(eval-when-compile (require 'cl))
+
+(require 'nnoo)
+(require 'message)
+(require 'gnus-util)
+(require 'gnus)
+(require 'nnmail)
+(require 'mm-util)
+(require 'nnweb)
+(eval-when-compile
+ (ignore-errors
+ (require 'w3)
+ (require 'url)
+ (require 'w3-forms)))
+;; Report failure to find w3 at load time if appropriate.
+(eval '(progn
+ (require 'w3)
+ (require 'url)
+ (require 'w3-forms)))
+
+(nnoo-declare nnultimate)
+
+(defvoo nnultimate-directory (nnheader-concat gnus-directory "ultimate/")
+ "Where nnultimate will save its files.")
+
+(defvoo nnultimate-address-1 "http://debet.solbors.no/cgi-bin/billboard/"
+ "The address of the Ultimate bulletin board.")
+
+;;; Internal variables
+
+(defvar nnultimate-groups nil)
+(defvar nnultimate-buffer nil)
+(defvar nnultimate-headers nil)
+(defvar nnultimate-articles nil)
+
+;;; Interface functions
+
+(nnoo-define-basics nnultimate)
+
+(deffoo nnultimate-retrieve-headers (articles &optional group server fetch-old)
+ (nnultimate-possibly-change-server group server)
+ (let* ((last (car (last articles)))
+ (did nil)
+ (start 1)
+ (entry (gnus-copy-sequence (assoc group nnultimate-groups)))
+ (sid (nth 2 entry))
+ (topics (nth 4 entry))
+ (mapping (nth 5 entry))
+ (old-total (or (nth 6 entry) 0))
+ (furl "forumdisplay.cgi?action=topics&number=%d&DaysPrune=1000")
+ (turl "http://debet.solbors.no/billboard/Forum%d/HTML/%06d.html")
+ headers article subject score from date lines parent point
+ contents tinfo fetchers map elem)
+ (save-excursion
+ (set-buffer nnultimate-buffer)
+ (erase-buffer)
+ (url-insert-file-contents
+ (concat nnultimate-address-1 (format furl sid)))
+ (setq buffer-file-name nil)
+ (goto-char (point-min))
+ (setq contents (nth 2 (car (nth 2
+ (nnultimate-find-forum-table
+ (w3-parse-buffer (current-buffer)))))))
+ ;; The main idea here is to map Gnus article numbers to
+ ;; nnultimate article numbers. Say there are three topics in
+ ;; this forum, the first with 4 articles, the seconds with 2,
+ ;; and the third with 1. Then this will translate into 7 Gnus
+ ;; article numbers, where 1-4 comes from the first topic, 5-6
+ ;; from the second and 7 from the third. Now, then next time
+ ;; the group is entered, there's 2 new articles in topic one and
+ ;; 1 in topic three. Then Gnus article number 8-9 be 5-6 in
+ ;; topic one and 10 will be the 2 in topic three.
+ (dolist (row (cdr contents))
+ (setq row (nth 2 row))
+ (when (setq a (nnultimate-descend 'a (nth 2 row)))
+ (setq subject (car (last (nnultimate-text a)))
+ href (cdr (assq 'href (nth 1 a))))
+ (setq garticles (1+ (string-to-number (car (last (nnultimate-text
+ (nth 4 row)))))))
+ (string-match "/\\([0-9]+\\).html" href)
+ (setq topic (string-to-number (match-string 1 href)))
+ (if (setq tinfo (assq topic topics))
+ (progn
+ (setq old-max (cadr tinfo))
+ (setcar (cdr tinfo) garticles))
+ (setq old-max 0)
+ (push (list topic garticles subject) topics)
+ (setcar (nthcdr 4 entry) topics))
+ (when (not (= old-max garticles))
+ (setq inc (- garticles old-max))
+ (setq mapping (nconc mapping
+ (list
+ (list
+ (setq old-total (+ old-total inc))
+ topic (1+ old-max)))))
+ (incf old-max inc)
+ (setcar (nthcdr 5 entry) mapping))))
+ (setq map mapping)
+ (while (and (setq article (car articles))
+ map)
+ (while (and map
+ (> article (caar map)))
+ (pop map))
+ (while (and article
+ map
+ (<= article (caar map)))
+ (if (setq elem (assq (cadar map) fetchers))
+ (nconc elem (list (cons article
+ (+ (caddar map)
+ (- (caar map) article)))))
+ (push (list (cadar map) (cons article
+ (+ (caddar map)
+ (- (caar map) article))))
+ fetchers))
+ (setq article (car (setq articles (cdr articles))))))
+ ;; Now we have the mapping from/to Gnus/nnultimate article numbers,
+ ;; so we start fetching the topics that we need to satisfy the
+ ;; request.
+ (if (not fetchers)
+ (save-excursion
+ (set-buffer nntp-server-buffer)
+ (erase-buffer))
+ (setq nnultimate-articles nil)
+ (with-temp-buffer
+ (dolist (elem fetchers)
+ (erase-buffer)
+ (setq subject (nth 2 (assq (car elem) topics)))
+ (url-insert-file-contents (format turl sid (car elem)))
+ (setq buffer-file-name nil)
+ (goto-char (point-min))
+ (setq contents
+ (cdr
+ (nth 2 (car (nth 2
+ (nnultimate-find-forum-table
+ (w3-parse-buffer (current-buffer))))))))
+ (dolist (art (cdr elem))
+ (push (list (car art)
+ (nth (1- (cdr art)) contents)
+ subject)
+ nnultimate-articles))))
+ (setq nnultimate-articles
+ (sort nnultimate-articles 'car-less-than-car))
+ ;; Now we have all the articles, conveniently in an alist
+ ;; where the key is the Gnus article number.
+ (dolist (articlef nnultimate-articles)
+ (setq article (nth 0 articlef)
+ contents (nth 1 articlef)
+ subject (nth 2 articlef))
+ (setq from (mapconcat 'identity
+ (nnultimate-text (car (nth 2 contents)))
+ " ")
+ datel (nnultimate-text (nth 2 (car (cdr (nth 2 contents))))))
+ (while datel
+ (when (string-match "Posted" (car datel))
+ (setq date (substring (car datel) (match-end 0))
+ datel nil))
+ (pop datel))
+ (when (string-match " *\\([-0-9]+ [0-9:]+\\)[\n ]+" date)
+ (setq date (match-string 1 date)))
+ (push
+ (cons
+ article
+ (make-full-mail-header
+ article subject
+ from (or date "")
+ (concat "<" (number-to-string sid) "%"
+ (number-to-string article)
+ "@ultimate>")
+ "" 0 0 nil nil))
+ headers))
+ (setq nnultimate-headers (sort headers 'car-less-than-car))
+ (save-excursion
+ (set-buffer nntp-server-buffer)
+ (erase-buffer)
+ (dolist (header nnultimate-headers)
+ (nnheader-insert-nov (cdr header))))))
+ 'nov))
+
+(deffoo nnultimate-request-group (group &optional server dont-check)
+ (nnultimate-possibly-change-server nil server)
+ (let ((elem (assoc group nnultimate-groups)))
+ (cond
+ ((not elem)
+ (nnheader-report 'nnultimate "Group does not exist"))
+ (t
+ (nnheader-report 'nnultimate "Opened group %s" group)
+ (nnheader-insert
+ "211 %d %d %d %s\n" (cadr elem) 1 (cadr elem)
+ (prin1-to-string group))))))
+
+(deffoo nnultimate-close-group (group &optional server)
+ (nnultimate-possibly-change-server group server)
+ (when (gnus-buffer-live-p nnultimate-buffer)
+ (save-excursion
+ (set-buffer nnultimate-buffer)
+ (kill-buffer nnultimate-buffer)))
+ t)
+
+(deffoo nnultimate-request-article (article &optional group server buffer)
+ (nnultimate-possibly-change-server group server)
+ (let ((contents (cdr (assq article nnultimate-articles))))
+ (when contents
+ (save-excursion
+ (set-buffer (or buffer nntp-server-buffer))
+ (erase-buffer)
+ (apply 'insert (nnultimate-text contents))
+ (goto-char (point-min))
+ (insert "Content-Type: text/html\nMIME-Version: 1.0\n")
+ (let ((header (cdr (assq article nnultimate-headers))))
+ (nnheader-insert-header header))
+ (nnheader-report 'nnultimate "Fetched article %s" article)
+ (cons group article)))))
+
+(deffoo nnultimate-close-server (&optional server)
+ (when (and (nnultimate-server-opened server)
+ (gnus-buffer-live-p nnultimate-buffer))
+ (save-excursion
+ (set-buffer nnultimate-buffer)
+ (kill-buffer nnultimate-buffer)))
+ (nnoo-close-server 'nnultimate server))
+
+(deffoo nnultimate-request-list (&optional server)
+ (nnultimate-possibly-change-server nil server)
+ (with-temp-buffer
+ (url-insert-file-contents (concat nnultimate-address-1 "Ultimate.cgi"))
+ (setq buffer-file-name nil)
+ (let ((contents (nth 2 (car (nth 2
+ (nnultimate-find-forum-table
+ (w3-parse-buffer (current-buffer)))))))
+ sid elem description articles a href group)
+ (dolist (row contents)
+ (setq row (nth 2 row))
+ (when (setq a (nnultimate-descend 'a row))
+ (setq group (car (last (nnultimate-text a)))
+ href (cdr (assq 'href (nth 1 a))))
+ (setq description (car (last (nnultimate-text (nth 1 row)))))
+ (setq articles (string-to-number (car (last (nnultimate-text
+ (nth 2 row))))))
+ (when href
+ (string-match "number=\\([0-9]+\\)" href)
+ (setq forum (string-to-number (match-string 1 href)))
+ (if (setq elem (assoc group nnultimate-groups))
+ (setcar (cdr elem) articles)
+ (push (list group articles forum description nil nil nil)
+ nnultimate-groups))))))
+ (nnultimate-write-groups)
+ (nnultimate-generate-active)
+ t))
+
+(deffoo nnultimate-request-newgroups (date &optional server)
+ (nnultimate-possibly-change-server nil server)
+ (nnultimate-generate-active)
+ t)
+
+(deffoo nnultimate-asynchronous-p ()
+ nil)
+
+(nnoo-define-skeleton nnultimate)
+
+;;; Internal functions
+
+(defun nnultimate-possibly-change-server (&optional group server)
+ (nnultimate-init server)
+ (when (and server
+ (not (nnultimate-server-opened server)))
+ (nnultimate-open-server server))
+ (unless nnultimate-groups
+ (nnultimate-read-groups)))
+
+(defun nnultimate-read-groups ()
+ (let ((file (expand-file-name "groups" nnultimate-directory)))
+ (when (file-exists-p file)
+ (with-temp-buffer
+ (insert-file-contents file)
+ (goto-char (point-min))
+ (setq nnultimate-groups (read (current-buffer)))))))
+
+(defun nnultimate-write-groups ()
+ (with-temp-file (expand-file-name "groups" nnultimate-directory)
+ (prin1 nnultimate-groups (current-buffer))))
+
+(defun nnultimate-init (server)
+ "Initialize buffers and such."
+ (unless (file-exists-p nnultimate-directory)
+ (gnus-make-directory nnultimate-directory))
+ (unless (gnus-buffer-live-p nnultimate-buffer)
+ (setq nnultimate-buffer
+ (save-excursion
+ (nnheader-set-temp-buffer
+ (format " *nnultimate %s*" server))))))
+
+(defun nnultimate-encode-www-form-urlencoded (pairs)
+ "Return PAIRS encoded for forms."
+ (mapconcat
+ (function
+ (lambda (data)
+ (concat (w3-form-encode-xwfu (car data)) "="
+ (w3-form-encode-xwfu (cdr data)))))
+ pairs "&"))
+
+(defun nnultimate-fetch-form (url pairs)
+ (let ((url-request-data (nnultimate-encode-www-form-urlencoded pairs))
+ (url-request-method "POST")
+ (url-request-extra-headers
+ '(("Content-type" . "application/x-www-form-urlencoded"))))
+ (url-insert-file-contents url)
+ (setq buffer-file-name nil))
+ t)
+
+(defun nnultimate-decode-entities ()
+ (goto-char (point-min))
+ (while (re-search-forward "&\\([a-z]+\\);" nil t)
+ (replace-match (char-to-string (or (cdr (assq (intern (match-string 1))
+ w3-html-entities))
+ ?#))
+ t t)))
+
+(defun nnultimate-remove-markup ()
+ (goto-char (point-min))
+ (while (search-forward "<!--" nil t)
+ (delete-region (match-beginning 0)
+ (or (search-forward "-->" nil t)
+ (point-max))))
+ (goto-char (point-min))
+ (while (re-search-forward "<[^>]+>" nil t)
+ (replace-match "" t t)))
+
+(defun nnultimate-date-to-date (sdate)
+ (let ((elem (split-string sdate)))
+ (concat (substring (nth 0 elem) 0 3) " "
+ (substring (nth 1 elem) 0 3) " "
+ (substring (nth 2 elem) 0 2) " "
+ (substring (nth 3 elem) 1 6) " "
+ (format-time-string "%Y") " "
+ (nth 4 elem))))
+
+(defun nnultimate-generate-active ()
+ (save-excursion
+ (set-buffer nntp-server-buffer)
+ (erase-buffer)
+ (dolist (elem nnultimate-groups)
+ (insert (prin1-to-string (car elem))
+ " " (number-to-string (cadr elem)) " 1 y\n"))))
+
+(defun nnultimate-find-forum-table (contents)
+ (catch 'found
+ (nnultimate-find-forum-table-1 contents)))
+
+(defun nnultimate-find-forum-table-1 (contents)
+ (dolist (element contents)
+ (unless (stringp element)
+ (when (and (eq (car element) 'table)
+ (equalp (cdr (assq 'width (cadr element))) "100%"))
+ (throw 'found element))
+ (when (nth 2 element)
+ (nnultimate-find-forum-table-1 (nth 2 element))))))
+
+(defun nnultimate-descend (type contents)
+ (catch 'found
+ (nnultimate-descend-1 type contents)))
+
+(defun nnultimate-descend-1 (type contents)
+ (when (consp contents)
+ (when (eq (car contents) type)
+ (throw 'found contents))
+ (when (listp (cdr contents))
+ (dolist (element contents)
+ (when (consp element)
+ (nnultimate-descend-1 type element))))))
+
+(defvar nnultimate-text)
+(defun nnultimate-text (contents)
+ (let ((nnultimate-text nil))
+ (nnultimate-text-1 contents)
+ (nreverse nnultimate-text)))
+
+(defun nnultimate-text-1 (contents)
+ (when (consp (car contents))
+ (dolist (element contents)
+ (if (stringp element)
+ (push element nnultimate-text)
+ (when (consp element)
+ (nnultimate-text-1 (nth 2 element)))))))
+
+
+(defun nnultimate-text-1 (contents)
+ (dolist (element contents)
+ (if (stringp element)
+ (push element nnultimate-text)
+ (when (and (consp element)
+ (listp (cdr element)))
+ (nnultimate-text-1 element)))))
+
+(provide 'nnultimate)
+
+;;; nnultimate.el ends here
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