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114f9c9679
emacs/lisp/gnus/nnultimate.el
Glenn Morris 114f9c9679 Add 2010 to copyright years.
2010-01-13 00:35:10 -08:00

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;;; nnultimate.el --- interfacing with the Ultimate Bulletin Board system
;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004,
;; 2005, 2006, 2007, 2008, 2009, 2010 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
;;; 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)
(require 'parse-time)
(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 <20><><EFBFBD>]")))
(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:
;; arch-tag: ab6bfc45-8fe1-4647-9c78-41050eb152b8
;;; nnultimate.el ends here
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