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- ;;; nnkiboze.el --- select virtual news access for Gnus
- ;; Copyright (C) 1995,96 Free Software Foundation, Inc.
-
- ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
- ;; 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:
-
- ;; The other access methods (nntp, nnspool, etc) are general news
- ;; access methods. This module relies on Gnus and can not be used
- ;; separately.
-
- ;;; Code:
-
- (require 'nntp)
- (require 'nnheader)
- (require 'gnus)
- (require 'gnus-score)
- (require 'nnoo)
- (eval-when-compile (require 'cl))
-
- (nnoo-declare nnkiboze)
- (defvoo nnkiboze-directory gnus-directory
- "nnkiboze will put its files in this directory.")
-
- (defvoo nnkiboze-level 9
- "*The maximum level to be searched for articles.")
-
- (defvoo nnkiboze-remove-read-articles t
- "*If non-nil, nnkiboze will remove read articles from the kiboze group.")
-
-
-
- (defconst nnkiboze-version "nnkiboze 1.0"
- "Version numbers of this version of nnkiboze.")
-
- (defvoo nnkiboze-current-group nil)
- (defvoo nnkiboze-current-score-group "")
- (defvoo nnkiboze-status-string "")
-
-
-
- ;;; Interface functions.
-
- (nnoo-define-basics nnkiboze)
-
- (deffoo nnkiboze-retrieve-headers (articles &optional group server fetch-old)
- (nnkiboze-possibly-change-newsgroups group)
- (if gnus-nov-is-evil
- nil
- (if (stringp (car articles))
- 'headers
- (let ((first (car articles))
- (last (progn (while (cdr articles) (setq articles (cdr articles)))
- (car articles)))
- (nov (nnkiboze-nov-file-name)))
- (if (file-exists-p nov)
- (save-excursion
- (set-buffer nntp-server-buffer)
- (erase-buffer)
- (insert-file-contents nov)
- (goto-char (point-min))
- (while (and (not (eobp)) (< first (read (current-buffer))))
- (forward-line 1))
- (beginning-of-line)
- (if (not (eobp)) (delete-region 1 (point)))
- (while (and (not (eobp)) (>= last (read (current-buffer))))
- (forward-line 1))
- (beginning-of-line)
- (if (not (eobp)) (delete-region (point) (point-max)))
- 'nov))))))
-
- (deffoo nnkiboze-open-server (newsgroups &optional something)
- (gnus-make-directory nnkiboze-directory)
- (nnheader-init-server-buffer))
-
- (deffoo nnkiboze-server-opened (&optional server)
- (and nntp-server-buffer
- (get-buffer nntp-server-buffer)))
-
- (deffoo nnkiboze-request-article (article &optional newsgroup server buffer)
- (nnkiboze-possibly-change-newsgroups newsgroup)
- (if (not (numberp article))
- ;; This is a real kludge. It might not work at times, but it
- ;; does no harm I think. The only alternative is to offer no
- ;; article fetching by message-id at all.
- (nntp-request-article article newsgroup gnus-nntp-server buffer)
- (let* ((header (gnus-summary-article-header article))
- (xref (mail-header-xref header))
- igroup iarticle)
- (or xref (error "nnkiboze: No xref"))
- (or (string-match " \\([^ ]+\\):\\([0-9]+\\)" xref)
- (error "nnkiboze: Malformed xref"))
- (setq igroup (substring xref (match-beginning 1) (match-end 1)))
- (setq iarticle (string-to-int
- (substring xref (match-beginning 2) (match-end 2))))
- (and (gnus-request-group igroup t)
- (gnus-request-article iarticle igroup buffer)))))
-
- (deffoo nnkiboze-request-group (group &optional server dont-check)
- "Make GROUP the current newsgroup."
- (nnkiboze-possibly-change-newsgroups group)
- (if dont-check
- ()
- (let ((nov-file (nnkiboze-nov-file-name))
- beg end total)
- (save-excursion
- (set-buffer nntp-server-buffer)
- (erase-buffer)
- (if (not (file-exists-p nov-file))
- (insert (format "211 0 0 0 %s\n" group))
- (insert-file-contents nov-file)
- (if (zerop (buffer-size))
- (insert (format "211 0 0 0 %s\n" group))
- (goto-char (point-min))
- (and (looking-at "[0-9]+") (setq beg (read (current-buffer))))
- (goto-char (point-max))
- (and (re-search-backward "^[0-9]" nil t)
- (setq end (read (current-buffer))))
- (setq total (count-lines (point-min) (point-max)))
- (erase-buffer)
- (insert (format "211 %d %d %d %s\n" total beg end group)))))))
- t)
-
- (deffoo nnkiboze-close-group (group &optional server)
- (nnkiboze-possibly-change-newsgroups group)
- ;; Remove NOV lines of articles that are marked as read.
- (when (and (file-exists-p (nnkiboze-nov-file-name))
- nnkiboze-remove-read-articles
- (eq major-mode 'gnus-summary-mode))
- (save-excursion
- (let ((unreads gnus-newsgroup-unreads)
- (unselected gnus-newsgroup-unselected)
- (version-control 'never))
- (set-buffer (get-buffer-create "*nnkiboze work*"))
- (buffer-disable-undo (current-buffer))
- (erase-buffer)
- (let ((cur (current-buffer))
- article)
- (insert-file-contents (nnkiboze-nov-file-name))
- (goto-char (point-min))
- (while (looking-at "[0-9]+")
- (if (or (memq (setq article (read cur)) unreads)
- (memq article unselected))
- (forward-line 1)
- (delete-region (progn (beginning-of-line) (point))
- (progn (forward-line 1) (point)))))
- (write-file (nnkiboze-nov-file-name))
- (kill-buffer (current-buffer)))))
- (setq nnkiboze-current-group nil)))
-
- (deffoo nnkiboze-request-list (&optional server)
- (nnheader-report 'nnkiboze "LIST is not implemented."))
-
- (deffoo nnkiboze-request-newgroups (date &optional server)
- "List new groups."
- (nnheader-report 'nnkiboze "NEWGROUPS is not supported."))
-
- (deffoo nnkiboze-request-list-newsgroups (&optional server)
- (nnheader-report 'nnkiboze "LIST NEWSGROUPS is not implemented."))
-
- (deffoo nnkiboze-request-delete-group (group &optional force server)
- (nnkiboze-possibly-change-newsgroups group)
- (when force
- (let ((files (list (nnkiboze-nov-file-name)
- (concat nnkiboze-directory group ".newsrc")
- (nnkiboze-score-file group))))
- (while files
- (and (file-exists-p (car files))
- (file-writable-p (car files))
- (delete-file (car files)))
- (setq files (cdr files)))))
- (setq nnkiboze-current-group nil))
-
-
- ;;; Internal functions.
-
- (defun nnkiboze-possibly-change-newsgroups (group)
- (setq nnkiboze-current-group group))
-
- (defun nnkiboze-prefixed-name (group)
- (gnus-group-prefixed-name group '(nnkiboze "")))
-
- ;;;###autoload
- (defun nnkiboze-generate-groups ()
- "Usage: emacs -batch -l nnkiboze -f nnkiboze-generate-groups
- Finds out what articles are to be part of the nnkiboze groups."
- (interactive)
- (let ((nnmail-spool-file nil)
- (gnus-use-dribble-file nil)
- (gnus-read-active-file t)
- (gnus-expert-user t))
- (gnus))
- (let* ((gnus-newsrc-alist (gnus-copy-sequence gnus-newsrc-alist))
- (newsrc gnus-newsrc-alist)
- gnus-newsrc-hashtb)
- (gnus-make-hashtable-from-newsrc-alist)
- ;; We have copied all the newsrc alist info over to local copies
- ;; so that we can mess all we want with these lists.
- (while newsrc
- (if (string-match "nnkiboze" (caar newsrc))
- ;; For each kiboze group, we call this function to generate
- ;; it.
- (nnkiboze-generate-group (caar newsrc)))
- (setq newsrc (cdr newsrc)))))
-
- (defun nnkiboze-score-file (group)
- (list (expand-file-name
- (concat (file-name-as-directory gnus-kill-files-directory)
- (nnheader-translate-file-chars
- (concat nnkiboze-current-score-group
- "." gnus-score-file-suffix))))))
-
- (defun nnkiboze-generate-group (group)
- (let* ((info (nth 2 (gnus-gethash group gnus-newsrc-hashtb)))
- (newsrc-file (concat nnkiboze-directory group ".newsrc"))
- (nov-file (concat nnkiboze-directory group ".nov"))
- (regexp (nth 1 (nth 4 info)))
- (gnus-expert-user t)
- (gnus-large-newsgroup nil)
- (version-control 'never)
- (gnus-score-find-score-files-function 'nnkiboze-score-file)
- gnus-select-group-hook gnus-summary-prepare-hook
- gnus-thread-sort-functions gnus-show-threads
- gnus-visual
- method nnkiboze-newsrc nov-buffer gname newsrc active
- ginfo lowest glevel)
- (setq nnkiboze-current-score-group group)
- (or info (error "No such group: %s" group))
- ;; Load the kiboze newsrc file for this group.
- (and (file-exists-p newsrc-file) (load newsrc-file))
- ;; We also load the nov file for this group.
- (save-excursion
- (set-buffer (setq nov-buffer (find-file-noselect nov-file)))
- (buffer-disable-undo (current-buffer)))
- ;; Go through the active hashtb and add new all groups that match the
- ;; kiboze regexp.
- (mapatoms
- (lambda (group)
- (and (string-match regexp (setq gname (symbol-name group))) ; Match
- (not (assoc gname nnkiboze-newsrc)) ; It isn't registered
- (numberp (car (symbol-value group))) ; It is active
- (or (> nnkiboze-level 7)
- (and (setq glevel (nth 1 (nth 2 (gnus-gethash
- gname gnus-newsrc-hashtb))))
- (>= nnkiboze-level glevel)))
- (not (string-match "^nnkiboze:" gname)) ; Exclude kibozes
- (setq nnkiboze-newsrc
- (cons (cons gname (1- (car (symbol-value group))))
- nnkiboze-newsrc))))
- gnus-active-hashtb)
- ;; `newsrc' is set to the list of groups that possibly are
- ;; component groups to this kiboze group. This list has elements
- ;; on the form `(GROUP . NUMBER)', where NUMBER is the highest
- ;; number that has been kibozed in GROUP in this kiboze group.
- (setq newsrc nnkiboze-newsrc)
- (while newsrc
- (if (not (setq active (gnus-gethash
- (caar newsrc) gnus-active-hashtb)))
- ;; This group isn't active after all, so we remove it from
- ;; the list of component groups.
- (setq nnkiboze-newsrc (delq (car newsrc) nnkiboze-newsrc))
- (setq lowest (cdar newsrc))
- ;; Ok, we have a valid component group, so we jump to it.
- (switch-to-buffer gnus-group-buffer)
- (gnus-group-jump-to-group (caar newsrc))
- ;; We set all list of article marks to nil. Since we operate
- ;; on copies of the real lists, we can destroy anything we
- ;; want here.
- (and (setq ginfo (nth 2 (gnus-gethash (gnus-group-group-name)
- gnus-newsrc-hashtb)))
- (nth 3 ginfo)
- (setcar (nthcdr 3 ginfo) nil))
- ;; We set the list of read articles to be what we expect for
- ;; this kiboze group -- either nil or `(1 . LOWEST)'.
- (and ginfo (setcar (nthcdr 2 ginfo)
- (and (not (= lowest 1)) (cons 1 lowest))))
- (if (not (and (or (not ginfo)
- (> (length (gnus-list-of-unread-articles
- (car ginfo))) 0))
- (progn
- (gnus-group-select-group nil)
- (eq major-mode 'gnus-summary-mode))))
- () ; No unread articles, or we couldn't enter this group.
- ;; We are now in the group where we want to be.
- (setq method (gnus-find-method-for-group gnus-newsgroup-name))
- (and (eq method gnus-select-method) (setq method nil))
- ;; We go through the list of scored articles.
- (while gnus-newsgroup-scored
- (if (> (caar gnus-newsgroup-scored) lowest)
- ;; If it has a good score, then we enter this article
- ;; into the kiboze group.
- (nnkiboze-enter-nov
- nov-buffer
- (gnus-summary-article-header
- (caar gnus-newsgroup-scored))
- (if method
- (gnus-group-prefixed-name gnus-newsgroup-name method)
- gnus-newsgroup-name)))
- (setq gnus-newsgroup-scored (cdr gnus-newsgroup-scored)))
- ;; That's it. We exit this group.
- (gnus-summary-exit-no-update)))
- (setcdr (car newsrc) (car active))
- (setq newsrc (cdr newsrc)))
- ;; We save the nov file.
- (set-buffer nov-buffer)
- (save-buffer)
- (kill-buffer (current-buffer))
- ;; We save the kiboze newsrc for this group.
- (set-buffer (get-buffer-create "*nnkiboze work*"))
- (buffer-disable-undo (current-buffer))
- (erase-buffer)
- (insert "(setq nnkiboze-newsrc '" (prin1-to-string nnkiboze-newsrc)
- ")\n")
- (write-file newsrc-file)
- (kill-buffer (current-buffer))
- (switch-to-buffer gnus-group-buffer)
- (gnus-group-list-groups 5 nil)))
-
- (defun nnkiboze-enter-nov (buffer header group)
- (save-excursion
- (set-buffer buffer)
- (goto-char (point-max))
- (let ((xref (mail-header-xref header))
- (prefix (gnus-group-real-prefix group))
- (first t)
- article)
- (if (zerop (forward-line -1))
- (progn
- (setq article (1+ (read (current-buffer))))
- (forward-line 1))
- (setq article 1))
- (insert (int-to-string article) "\t"
- (or (mail-header-subject header) "") "\t"
- (or (mail-header-from header) "") "\t"
- (or (mail-header-date header) "") "\t"
- (or (mail-header-id header) "") "\t"
- (or (mail-header-references header) "") "\t"
- (int-to-string (or (mail-header-chars header) 0)) "\t"
- (int-to-string (or (mail-header-lines header) 0)) "\t")
- (if (or (not xref) (equal "" xref))
- (insert "Xref: " (system-name) " " group ":"
- (int-to-string (mail-header-number header))
- "\t\n")
- (insert (mail-header-xref header) "\t\n")
- (search-backward "\t" nil t)
- (search-backward "\t" nil t)
- (while (re-search-forward
- "[^ ]+:[0-9]+"
- (save-excursion (end-of-line) (point)) t)
- (if first
- ;; The first xref has to be the group this article
- ;; really came for - this is the article nnkiboze
- ;; will request when it is asked for the article.
- (save-excursion
- (goto-char (match-beginning 0))
- (insert prefix group ":"
- (int-to-string (mail-header-number header)) " ")
- (setq first nil)))
- (save-excursion
- (goto-char (match-beginning 0))
- (insert prefix)))))))
-
- (defun nnkiboze-nov-file-name ()
- (concat (file-name-as-directory nnkiboze-directory)
- (nnheader-translate-file-chars
- (concat (nnkiboze-prefixed-name nnkiboze-current-group) ".nov"))))
-
- (provide 'nnkiboze)
-
- ;;; nnkiboze.el ends here
-