;;; nnultimate.el --- interfacing with the Ultimate Bulletin Board system ;; Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc. ;; Author: Lars Magne Ingebrigtsen ;; 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 'mm-url) (require 'nnweb) (autoload 'w3-parse-buffer "w3-parse") (nnoo-declare nnultimate) (defvoo nnultimate-directory (nnheader-concat gnus-directory "ultimate/") "Where nnultimate will save its files.") (defvoo nnultimate-address "" "The address of the Ultimate bulletin board.") ;;; Internal variables (defvar nnultimate-groups-alist nil) (defvoo nnultimate-groups nil) (defvoo nnultimate-headers nil) (defvoo nnultimate-articles nil) (defvar nnultimate-table-regexp "postings.*editpost\\|forumdisplay\\|Forum[0-9]+/HTML\\|getbio") ;;; Interface functions (nnoo-define-basics nnultimate) (deffoo nnultimate-retrieve-headers (articles &optional group server fetch-old) (nnultimate-possibly-change-server group server) (unless gnus-nov-is-evil (let* ((last (car (last articles))) (did nil) (start 1) (entry (assoc group nnultimate-groups)) (sid (nth 2 entry)) (topics (nth 4 entry)) (mapping (nth 5 entry)) (old-total (or (nth 6 entry) 1)) (furl "forumdisplay.cgi?action=topics&number=%d&DaysPrune=1000") (furls (list (concat nnultimate-address (format furl sid)))) (nnultimate-table-regexp "postings.*editpost\\|forumdisplay\\|getbio") headers article subject score from date lines parent point contents tinfo fetchers map elem a href garticles topic old-max inc datel table current-page total-contents pages farticles forum-contents parse furl-fetched mmap farticle) (setq map mapping) (while (and (setq article (car articles)) map) ;; Skip past the articles in the map until we reach the ;; article we're looking for. (while (and map (or (> article (caar map)) (< (cadar map) (caar map)))) (pop map)) (when (setq mmap (car map)) (setq farticle -1) (while (and article (<= article (nth 1 mmap))) ;; Do we already have a fetcher for this topic? (if (setq elem (assq (nth 2 mmap) fetchers)) ;; Yes, so we just add the spec to the end. (nconc elem (list (cons article (+ (nth 3 mmap) (incf farticle))))) ;; No, so we add a new one. (push (list (nth 2 mmap) (cons article (+ (nth 3 mmap) (incf farticle)))) fetchers)) (pop articles) (setq article (car 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) (mm-with-unibyte-buffer (dolist (elem fetchers) (setq pages 1 current-page 1 total-contents nil) (while (<= current-page pages) (erase-buffer) (setq subject (nth 2 (assq (car elem) topics))) (setq href (nth 3 (assq (car elem) topics))) (if (= current-page 1) (mm-url-insert href) (string-match "\\.html$" href) (mm-url-insert (concat (substring href 0 (match-beginning 0)) "-" (number-to-string current-page) (match-string 0 href)))) (goto-char (point-min)) (setq contents (ignore-errors (w3-parse-buffer (current-buffer)))) (setq table (nnultimate-find-forum-table contents)) (goto-char (point-min)) (when (re-search-forward "topic is \\([0-9]+\\) pages" nil t) (setq pages (string-to-number (match-string 1)))) (setq contents (cdr (nth 2 (car (nth 2 table))))) (setq total-contents (nconc total-contents contents)) (incf current-page)) (when t (let ((i 0)) (dolist (co total-contents) (push (list (or (nnultimate-topic-article-to-article group (car elem) (incf i)) 1) co subject) nnultimate-articles)))) (when nil (dolist (art (cdr elem)) (when (nth (1- (cdr art)) total-contents) (push (list (car art) (nth (1- (cdr art)) total-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 (nnweb-text (car (nth 2 contents))) " ") datel (nnweb-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 date (setq date (delete "" (split-string date "[-, \n\t\r    ]"))) (setq date (if (or (member "AM" date) (member "PM" date)) (format "%s %s %s %s" (nth 1 date) (if (and (>= (length (nth 0 date)) 3) (assoc (downcase (substring (nth 0 date) 0 3)) parse-time-months)) (substring (nth 0 date) 0 3) (car (rassq (string-to-number (nth 0 date)) parse-time-months))) (nth 2 date) (nth 3 date)) (format "%s %s %s %s" (car (rassq (string-to-number (nth 1 date)) parse-time-months)) (nth 0 date) (nth 2 date) (nth 3 date))))) (push (cons article (make-full-mail-header article subject from (or date "") (concat "<" (number-to-string sid) "%" (number-to-string article) "@ultimate." server ">") "" 0 (/ (length (mapconcat 'identity (nnweb-text (cdr (nth 2 (nth 1 (nth 2 contents))))) "")) 70) nil nil)) headers)) (setq nnultimate-headers (sort headers 'car-less-than-car)) (save-excursion (set-buffer nntp-server-buffer) (mm-with-unibyte-current-buffer (erase-buffer) (dolist (header nnultimate-headers) (nnheader-insert-nov (cdr header)))))) 'nov))) (defun nnultimate-topic-article-to-article (group topic article) (catch 'found (dolist (elem (nth 5 (assoc group nnultimate-groups))) (when (and (= topic (nth 2 elem)) (>= article (nth 3 elem)) (< article (+ (- (nth 1 elem) (nth 0 elem)) 1 (nth 3 elem)))) (throw 'found (+ (nth 0 elem) (- article (nth 3 elem)))))))) (deffoo nnultimate-request-group (group &optional server dont-check) (nnultimate-possibly-change-server nil server) (when (not nnultimate-groups) (nnultimate-request-list)) (unless dont-check (nnultimate-create-mapping group)) (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-request-close () (setq nnultimate-groups-alist nil nnultimate-groups nil)) (deffoo nnultimate-request-article (article &optional group server buffer) (nnultimate-possibly-change-server group server) (let ((contents (cdr (assq article nnultimate-articles)))) (setq contents (cddr (nth 2 (nth 1 (nth 2 (car contents)))))) (when contents (save-excursion (set-buffer (or buffer nntp-server-buffer)) (erase-buffer) (nnweb-insert-html (cons 'p (cons nil (list contents)))) (goto-char (point-min)) (insert "Content-Type: text/html\nMIME-Version: 1.0\n") (let ((header (cdr (assq article nnultimate-headers)))) (mm-with-unibyte-current-buffer (nnheader-insert-header header))) (nnheader-report 'nnultimate "Fetched article %s" article) (cons group article))))) (deffoo nnultimate-request-list (&optional server) (nnultimate-possibly-change-server nil server) (mm-with-unibyte-buffer (mm-url-insert (if (string-match "/$" nnultimate-address) (concat nnultimate-address "Ultimate.cgi") nnultimate-address)) (let ((contents (nth 2 (car (nth 2 (nnultimate-find-forum-table (w3-parse-buffer (current-buffer))))))) sid elem description articles a href group forum a1 a2) (dolist (row contents) (setq row (nth 2 row)) (when (setq a (nnweb-parse-find 'a row)) (setq group (car (last (nnweb-text a))) href (cdr (assq 'href (nth 1 a)))) (setq description (car (last (nnweb-text (nth 1 row))))) (setq a1 (car (last (nnweb-text (nth 2 row))))) (setq a2 (car (last (nnweb-text (nth 3 row))))) (when (string-match "^[0-9]+$" a1) (setq articles (string-to-number a1))) (when (and a2 (string-match "^[0-9]+$" a2)) (setq articles (max articles (string-to-number a2)))) (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 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) (nnoo-define-skeleton nnultimate) ;;; Internal functions (defun nnultimate-prune-days (group time) "Compute the number of days to fetch info for." (let ((old-time (nth 7 (assoc group nnultimate-groups)))) (if (null old-time) 1000 (- (time-to-days time) (time-to-days old-time))))) (defun nnultimate-create-mapping (group) (let* ((entry (assoc group nnultimate-groups)) (sid (nth 2 entry)) (topics (nth 4 entry)) (mapping (nth 5 entry)) (old-total (or (nth 6 entry) 1)) (current-time (current-time)) (furl (concat "forumdisplay.cgi?action=topics&number=%d&DaysPrune=" (number-to-string (nnultimate-prune-days group current-time)))) (furls (list (concat nnultimate-address (format furl sid)))) contents forum-contents furl-fetched a subject href garticles topic tinfo old-max inc parse) (mm-with-unibyte-buffer (while furls (erase-buffer) (mm-url-insert (pop furls)) (goto-char (point-min)) (setq parse (w3-parse-buffer (current-buffer))) (setq contents (cdr (nth 2 (car (nth 2 (nnultimate-find-forum-table parse)))))) (setq forum-contents (nconc contents forum-contents)) (unless furl-fetched (setq furl-fetched t) ;; On the first time through this loop, we find all the ;; forum URLs. (dolist (a (nnweb-parse-find-all 'a parse)) (let ((href (cdr (assq 'href (nth 1 a))))) (when (and href (string-match "forumdisplay.*startpoint" href)) (push href furls)))) (setq furls (nreverse furls)))) ;; 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 (nreverse forum-contents)) (setq row (nth 2 row)) (when (setq a (nnweb-parse-find 'a row)) (setq subject (car (last (nnweb-text a))) href (cdr (assq 'href (nth 1 a)))) (let ((artlist (nreverse (nnweb-text row))) art) (while (and (not art) artlist) (when (string-match "^[0-9]+$" (car artlist)) (setq art (1+ (string-to-number (car artlist))))) (pop artlist)) (setq garticles art)) (when garticles (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 href) topics) (setcar (nthcdr 4 entry) topics)) (when (not (= old-max garticles)) (setq inc (- garticles old-max)) (setq mapping (nconc mapping (list (list old-total (1- (incf old-total inc)) topic (1+ old-max))))) (incf old-max inc) (setcar (nthcdr 5 entry) mapping) (setcar (nthcdr 6 entry) old-total)))))) (setcar (nthcdr 7 entry) current-time) (setcar (nthcdr 1 entry) (1- old-total)) (nnultimate-write-groups) mapping)) (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-alist (nnultimate-read-groups) (setq nnultimate-groups (cdr (assoc nnultimate-address nnultimate-groups-alist))))) (deffoo nnultimate-open-server (server &optional defs connectionless) (nnheader-init-server-buffer) (if (nnultimate-server-opened server) t (unless (assq 'nnultimate-address defs) (setq defs (append defs (list (list 'nnultimate-address server))))) (nnoo-change-server 'nnultimate server defs))) (defun nnultimate-read-groups () (setq nnultimate-groups-alist nil) (let ((file (expand-file-name "groups" nnultimate-directory))) (when (file-exists-p file) (mm-with-unibyte-buffer (insert-file-contents file) (goto-char (point-min)) (setq nnultimate-groups-alist (read (current-buffer))))))) (defun nnultimate-write-groups () (setq nnultimate-groups-alist (delq (assoc nnultimate-address nnultimate-groups-alist) nnultimate-groups-alist)) (push (cons nnultimate-address nnultimate-groups) nnultimate-groups-alist) (with-temp-file (expand-file-name "groups" nnultimate-directory) (prin1 nnultimate-groups-alist (current-buffer)))) (defun nnultimate-init (server) "Initialize buffers and such." (unless (file-exists-p nnultimate-directory) (gnus-make-directory nnultimate-directory))) (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) (nnultimate-forum-table-p element)) (throw 'found element)) (when (nth 2 element) (nnultimate-find-forum-table-1 (nth 2 element)))))) (defun nnultimate-forum-table-p (parse) (when (not (apply 'gnus-or (mapcar (lambda (p) (nnweb-parse-find 'table p)) (nth 2 parse)))) (let ((href (cdr (assq 'href (nth 1 (nnweb-parse-find 'a parse 20))))) case-fold-search) (when (and href (string-match nnultimate-table-regexp href)) t)))) (provide 'nnultimate) ;; Local Variables: ;; coding: iso-8859-1 ;; End: ;;; nnultimate.el ends here