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NNMBOX.EL
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1996-01-20
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;;; nnmbox.el --- mail mbox access for Gnus
;; Copyright (C) 1995 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
;; Keywords: news, mail
;; 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:
;; For an overview of what the interface functions do, please see the
;; Gnus sources.
;;; Code:
(require 'nnheader)
(require 'rmail)
(require 'nnmail)
(defvar nnmbox-mbox-file (expand-file-name "~/mbox")
"The name of the mail box file in the user's home directory.")
(defvar nnmbox-active-file (expand-file-name "~/.mbox-active")
"The name of the active file for the mail box.")
(defvar nnmbox-get-new-mail t
"If non-nil, nnmbox will check the incoming mail file and split the mail.")
(defvar nnmbox-prepare-save-mail-hook nil
"Hook run narrowed to an article before saving.")
(defconst nnmbox-version "nnmbox 1.0"
"nnmbox version.")
(defvar nnmbox-current-group nil
"Current nnmbox news group directory.")
(defconst nnmbox-mbox-buffer nil)
(defvar nnmbox-status-string "")
(defvar nnmbox-group-alist nil)
(defvar nnmbox-active-timestamp nil)
(defvar nnmbox-current-server nil)
(defvar nnmbox-server-alist nil)
(defvar nnmbox-server-variables
(list
(list 'nnmbox-mbox-file nnmbox-mbox-file)
(list 'nnmbox-active-file nnmbox-active-file)
(list 'nnmbox-get-new-mail nnmbox-get-new-mail)
'(nnmbox-current-group nil)
'(nnmbox-status-string "")
'(nnmbox-group-alist nil)))
;;; Interface functions
(defun nnmbox-retrieve-headers (sequence &optional newsgroup server)
(save-excursion
(set-buffer nntp-server-buffer)
(erase-buffer)
(let ((number (length sequence))
(count 0)
article art-string start stop)
(nnmbox-possibly-change-newsgroup newsgroup)
(if (stringp (car sequence))
'headers
(while sequence
(setq article (car sequence))
(setq art-string (nnmbox-article-string article))
(set-buffer nnmbox-mbox-buffer)
(if (or (search-forward art-string nil t)
(progn (goto-char (point-min))
(search-forward art-string nil t)))
(progn
(setq start
(save-excursion
(re-search-backward
(concat "^" rmail-unix-mail-delimiter) nil t)
(point)))
(search-forward "\n\n" nil t)
(setq stop (1- (point)))
(set-buffer nntp-server-buffer)
(insert (format "221 %d Article retrieved.\n" article))
(insert-buffer-substring nnmbox-mbox-buffer start stop)
(goto-char (point-max))
(insert ".\n")))
(setq sequence (cdr sequence))
(setq count (1+ count))
(and (numberp nnmail-large-newsgroup)
(> number nnmail-large-newsgroup)
(zerop (% count 20))
gnus-verbose-backends
(message "nnmbox: Receiving headers... %d%%"
(/ (* count 100) number))))
(and (numberp nnmail-large-newsgroup)
(> number nnmail-large-newsgroup)
gnus-verbose-backends
(message "nnmbox: Receiving headers...done"))
;; Fold continuation lines.
(set-buffer nntp-server-buffer)
(goto-char (point-min))
(while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t)
(replace-match " " t t))
'headers))))
(defun nnmbox-open-server (server &optional defs)
(nnheader-init-server-buffer)
(if (equal server nnmbox-current-server)
t
(if nnmbox-current-server
(setq nnmbox-server-alist
(cons (list nnmbox-current-server
(nnheader-save-variables nnmbox-server-variables))
nnmbox-server-alist)))
(let ((state (assoc server nnmbox-server-alist)))
(if state
(progn
(nnheader-restore-variables (nth 1 state))
(setq nnmbox-server-alist (delq state nnmbox-server-alist)))
(nnheader-set-init-variables nnmbox-server-variables defs)))
(setq nnmbox-current-server server)))
(defun nnmbox-close-server (&optional server)
t)
(defun nnmbox-server-opened (&optional server)
(and (equal server nnmbox-current-server)
nnmbox-mbox-buffer
(buffer-name nnmbox-mbox-buffer)
nntp-server-buffer
(buffer-name nntp-server-buffer)))
(defun nnmbox-status-message (&optional server)
nnmbox-status-string)
(defun nnmbox-request-article (article &optional newsgroup server buffer)
(nnmbox-possibly-change-newsgroup newsgroup)
(if (stringp article)
nil
(save-excursion
(set-buffer nnmbox-mbox-buffer)
(goto-char (point-min))
(if (search-forward (nnmbox-article-string article) nil t)
(let (start stop)
(re-search-backward (concat "^" rmail-unix-mail-delimiter) nil t)
(setq start (point))
(forward-line 1)
(or (and (re-search-forward
(concat "^" rmail-unix-mail-delimiter) nil t)
(forward-line -1))
(goto-char (point-max)))
(setq stop (point))
(let ((nntp-server-buffer (or buffer nntp-server-buffer)))
(set-buffer nntp-server-buffer)
(erase-buffer)
(insert-buffer-substring nnmbox-mbox-buffer start stop)
(goto-char (point-min))
(while (looking-at "From ")
(delete-char 5)
(insert "X-From-Line: ")
(forward-line 1))
t))))))
(defun nnmbox-request-group (group &optional server dont-check)
(save-excursion
(if (nnmbox-possibly-change-newsgroup group)
(if dont-check
t
(nnmbox-get-new-mail group)
(save-excursion
(set-buffer nntp-server-buffer)
(erase-buffer)
(let ((active (assoc group nnmbox-group-alist)))
(insert (format "211 %d %d %d %s\n"
(1+ (- (cdr (car (cdr active)))
(car (car (cdr active)))))
(car (car (cdr active)))
(cdr (car (cdr active)))
(car active))))
t)))))
(defun nnmbox-close-group (group &optional server)
t)
(defun nnmbox-request-list (&optional server)
(if server (nnmbox-get-new-mail))
(save-excursion
(or (nnmail-find-file nnmbox-active-file)
(progn
(setq nnmbox-group-alist (nnmail-get-active))
(nnmail-save-active nnmbox-group-alist nnmbox-active-file)
(nnmail-find-file nnmbox-active-file)))))
(defun nnmbox-request-newgroups (date &optional server)
(nnmbox-request-list server))
(defun nnmbox-request-list-newsgroups (&optional server)
(setq nnmbox-status-string "nnmbox: LIST NEWSGROUPS is not implemented.")
nil)
(defun nnmbox-request-post (&optional server)
(mail-send-and-exit nil))
(defalias 'nnmbox-request-post-buffer 'nnmail-request-post-buffer)
(defun nnmbox-request-expire-articles
(articles newsgroup &optional server force)
(nnmbox-possibly-change-newsgroup newsgroup)
(let* ((days (or (and nnmail-expiry-wait-function
(funcall nnmail-expiry-wait-function newsgroup))
nnmail-expiry-wait))
(is-old t)
rest)
(nnmail-activate 'nnmbox)
(save-excursion
(set-buffer nnmbox-mbox-buffer)
(while (and articles is-old)
(goto-char (point-min))
(if (search-forward (nnmbox-article-string (car articles)) nil t)
(if (or force
(setq is-old
(> (nnmail-days-between
(current-time-string)
(buffer-substring
(point) (progn (end-of-line) (point))))
days)))
(progn
(and gnus-verbose-backends
(message "Deleting article %s..." (car articles)))
(nnmbox-delete-mail))
(setq rest (cons (car articles) rest))))
(setq articles (cdr articles)))
(save-buffer)
;; Find the lowest active article in this group.
(let ((active (nth 1 (assoc newsgroup nnmbox-group-alist))))
(goto-char (point-min))
(while (and (not (search-forward
(nnmbox-article-string (car active)) nil t))
(<= (car active) (cdr active)))
(setcar active (1+ (car active)))
(goto-char (point-min))))
(nnmail-save-active nnmbox-group-alist nnmbox-active-file)
(nconc rest articles))))
(defun nnmbox-request-move-article
(article group server accept-form &optional last)
(nnmbox-possibly-change-newsgroup group)
(let ((buf (get-buffer-create " *nnmbox move*"))
result)
(and
(nnmbox-request-article article group server)
(save-excursion
(set-buffer buf)
(buffer-disable-undo (current-buffer))
(erase-buffer)
(insert-buffer-substring nntp-server-buffer)
(goto-char (point-min))
(while (re-search-forward
"^X-Gnus-Newsgroup:"
(save-excursion (search-forward "\n\n" nil t) (point)) t)
(delete-region (progn (beginning-of-line) (point))
(progn (forward-line 1) (point))))
(setq result (eval accept-form))
(kill-buffer buf)
result)
(save-excursion
(set-buffer nnmbox-mbox-buffer)
(goto-char (point-min))
(if (search-forward (nnmbox-article-string article) nil t)
(nnmbox-delete-mail))
(and last (save-buffer))))
result))
(defun nnmbox-request-accept-article (group &optional last)
(let ((buf (current-buffer))
result)
(goto-char (point-min))
(if (looking-at "X-From-Line: ")
(replace-match "From ")
(insert "From nobody " (current-time-string) "\n"))
(and
(nnmail-activate 'nnmbox)
(progn
(set-buffer buf)
(goto-char (point-min))
(search-forward "\n\n" nil t)
(forward-line -1)
(while (re-search-backward "^X-Gnus-Newsgroup: " nil t)
(delete-region (point) (progn (forward-line 1) (point))))
(setq result (nnmbox-save-mail (and (stringp group) group))))
(save-excursion
(set-buffer nnmbox-mbox-buffer)
(insert-buffer-substring buf)
(and last (save-buffer))
result)
(nnmail-save-active nnmbox-group-alist nnmbox-active-file))
(car result)))
(defun nnmbox-request-replace-article (article group buffer)
(nnmbox-possibly-change-newsgroup group)
(save-excursion
(set-buffer nnmbox-mbox-buffer)
(goto-char (point-min))
(if (not (search-forward (nnmbox-article-string article) nil t))
nil
(nnmbox-delete-mail t t)
(insert-buffer-substring buffer)
(save-buffer)
t)))
;;; Internal functions.
;; If FORCE, delete article no matter how many X-Gnus-Newsgroup
;; headers there are. If LEAVE-DELIM, don't delete the Unix mbox
;; delimiter line.
(defun nnmbox-delete-mail (&optional force leave-delim)
;; Delete the current X-Gnus-Newsgroup line.
(or force
(delete-region
(progn (beginning-of-line) (point))
(progn (forward-line 1) (point))))
;; Beginning of the article.
(save-excursion
(save-restriction
(narrow-to-region
(save-excursion
(re-search-backward (concat "^" rmail-unix-mail-delimiter) nil t)
(if leave-delim (progn (forward-line 1) (point))
(match-beginning 0)))
(progn
(forward-line 1)
(or (and (re-search-forward (concat "^" rmail-unix-mail-delimiter)
nil t)
(if (and (not (bobp)) leave-delim)
(progn (forward-line -2) (point))
(match-beginning 0)))
(point-max))))
(goto-char (point-min))
;; Only delete the article if no other groups owns it as well.
(if (or force (not (re-search-forward "^X-Gnus-Newsgroup: " nil t)))
(delete-region (point-min) (point-max))))))
(defun nnmbox-possibly-change-newsgroup (newsgroup)
(if (or (not nnmbox-mbox-buffer)
(not (buffer-name nnmbox-mbox-buffer)))
(save-excursion
(set-buffer (setq nnmbox-mbox-buffer
(nnheader-find-file-noselect
nnmbox-mbox-file nil 'raw)))
(buffer-disable-undo (current-buffer))))
(if (not nnmbox-group-alist)
(nnmail-activate 'nnmbox))
(if newsgroup
(if (assoc newsgroup nnmbox-group-alist)
(setq nnmbox-current-group newsgroup))))
(defun nnmbox-article-string (article)
(concat "\nX-Gnus-Newsgroup: " nnmbox-current-group ":"
(int-to-string article) " "))
(defun nnmbox-save-mail (&optional group)
"Called narrowed to an article."
(let* ((nnmail-split-methods
(if group (list (list group "")) nnmail-split-methods))
(group-art (nreverse (nnmail-article-group 'nnmbox-active-number))))
(nnmail-insert-lines)
(nnmail-insert-xref group-art)
(nnmbox-insert-newsgroup-line group-art)
(run-hooks 'nnml-prepare-save-mail-hook)
group-art))
(defun nnmbox-insert-newsgroup-line (group-art)
(save-excursion
(goto-char (point-min))
(if (search-forward "\n\n" nil t)
(progn
(forward-char -1)
(while group-art
(insert (format "X-Gnus-Newsgroup: %s:%d %s\n"
(car (car group-art)) (cdr (car group-art))
(current-time-string)))
(setq group-art (cdr group-art)))))
t))
(defun nnmbox-active-number (group)
;; Find the next article number in GROUP.
(let ((active (car (cdr (assoc group nnmbox-group-alist)))))
(if active
(setcdr active (1+ (cdr active)))
;; This group is new, so we create a new entry for it.
;; This might be a bit naughty... creating groups on the drop of
;; a hat, but I don't know...
(setq nnmbox-group-alist (cons (list group (setq active (cons 1 1)))
nnmbox-group-alist)))
(cdr active)))
(defun nnmbox-read-mbox ()
(nnmail-activate 'nnmbox)
(if (not (file-exists-p nnmbox-mbox-file))
(write-region 1 1 nnmbox-mbox-file t 'nomesg))
(if (and nnmbox-mbox-buffer
(buffer-name nnmbox-mbox-buffer)
(save-excursion
(set-buffer nnmbox-mbox-buffer)
(= (buffer-size) (nth 7 (file-attributes nnmbox-mbox-file)))))
()
(save-excursion
(let ((delim (concat "^" rmail-unix-mail-delimiter))
start end)
(set-buffer (setq nnmbox-mbox-buffer
(nnheader-find-file-noselect
nnmbox-mbox-file nil 'raw)))
(buffer-disable-undo (current-buffer))
(goto-char (point-min))
(while (re-search-forward delim nil t)
(setq start (match-beginning 0))
(if (not (search-forward "\nX-Gnus-Newsgroup: "
(save-excursion
(setq end
(or
(and
(re-search-forward delim nil t)
(match-beginning 0))
(point-max))))
t))
(save-excursion
(save-restriction
(narrow-to-region start end)
(nnmbox-save-mail))))
(goto-char end))))))
(defun nnmbox-get-new-mail (&optional group)
"Read new incoming mail."
(let* ((spools (nnmail-get-spool-files group))
(group-in group)
incoming incomings)
(nnmbox-read-mbox)
(if (or (not nnmbox-get-new-mail) (not nnmail-spool-file))
()
;; We go through all the existing spool files and split the
;; mail from each.
(while spools
(and
(file-exists-p (car spools))
(> (nth 7 (file-attributes (car spools))) 0)
(progn
(and gnus-verbose-backends
(message "nnmbox: Reading incoming mail..."))
(if (not (setq incoming
(nnmail-move-inbox
(car spools)
(concat nnmbox-mbox-file "-Incoming"))))
()
(setq incomings (cons incoming incomings))
(save-excursion
(setq group (nnmail-get-split-group (car spools) group-in))
(let ((in-buf (nnmail-split-incoming
incoming 'nnmbox-save-mail t group)))
(set-buffer nnmbox-mbox-buffer)
(goto-char (point-max))
(insert-buffer-substring in-buf)
(kill-buffer in-buf))))))
(setq spools (cdr spools)))
;; If we did indeed read any incoming spools, we save all info.
(and (buffer-modified-p nnmbox-mbox-buffer)
(save-excursion
(nnmail-save-active nnmbox-group-alist nnmbox-active-file)
(set-buffer nnmbox-mbox-buffer)
(save-buffer)))
(if incomings (run-hooks 'nnmail-read-incoming-hook))
(while incomings
(setq incoming (car incomings))
(and nnmail-delete-incoming
(file-exists-p incoming)
(file-writable-p incoming)
(delete-file incoming))
(setq incomings (cdr incomings))))))
(provide 'nnmbox)
;;; nnmbox.el ends here