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;;; nndraft.el --- draft article access for Gnus
;; Copyright (C) 1995, 1996, 1997, 1998, 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:
;;; Code:
(require 'nnheader)
(require 'nnmail)
(require 'gnus-start)
(require 'nnmh)
(require 'nnoo)
(require 'mm-util)
(eval-when-compile (require 'cl))
(nnoo-declare nndraft
nnmh)
(defvoo nndraft-directory (nnheader-concat gnus-directory "drafts/")
"Where nndraft will store its files."
nnmh-directory)
(defvar nndraft-required-headers '(Date)
"*Headers to be generated when saving a draft message.
The headers in this variable and the ones in `message-required-headers'
are generated if and only if they are also in `message-draft-headers'.")
(defvoo nndraft-current-group "" nil nnmh-current-group)
(defvoo nndraft-get-new-mail nil nil nnmh-get-new-mail)
(defvoo nndraft-current-directory nil nil nnmh-current-directory)
(defconst nndraft-version "nndraft 1.0")
(defvoo nndraft-status-string "" nil nnmh-status-string)
;;; Interface functions.
(nnoo-define-basics nndraft)
(deffoo nndraft-open-server (server &optional defs)
(nnoo-change-server 'nndraft server defs)
(cond
((not (file-exists-p nndraft-directory))
(nndraft-close-server)
(nnheader-report 'nndraft "No such file or directory: %s"
nndraft-directory))
((not (file-directory-p (file-truename nndraft-directory)))
(nndraft-close-server)
(nnheader-report 'nndraft "Not a directory: %s" nndraft-directory))
(t
(nnheader-report 'nndraft "Opened server %s using directory %s"
server nndraft-directory)
t)))
(deffoo nndraft-retrieve-headers (articles &optional group server fetch-old)
(nndraft-possibly-change-group group)
(with-current-buffer nntp-server-buffer
(erase-buffer)
(let (article lines chars)
;; We don't support fetching by Message-ID.
(if (stringp (car articles))
'headers
(while articles
(narrow-to-region (point) (point))
(when (nndraft-request-article
(setq article (pop articles)) group server (current-buffer))
(goto-char (point-min))
(if (search-forward "\n\n" nil t)
(forward-line -1)
(goto-char (point-max)))
(setq lines (count-lines (point) (point-max))
chars (- (point-max) (point)))
(delete-region (point) (point-max))
(goto-char (point-min))
(insert (format "221 %d Article retrieved.\n" article))
(insert (format "Lines: %d\nChars: %d\n" lines chars))
(widen)
(goto-char (point-max))
(insert ".\n")))
(nnheader-fold-continuation-lines)
'headers))))
(deffoo nndraft-request-article (id &optional group server buffer)
(nndraft-possibly-change-group group)
(when (numberp id)
;; We get the newest file of the auto-saved file and the
;; "real" file.
(let* ((file (nndraft-article-filename id))
(auto (nndraft-auto-save-file-name file))
(newest (if (file-newer-than-file-p file auto) file auto))
(nntp-server-buffer (or buffer nntp-server-buffer)))
(when (and (file-exists-p newest)
(let ((nnmail-file-coding-system
(if (file-newer-than-file-p file auto)
(if (member group '("drafts" "delayed"))
message-draft-coding-system
mm-text-coding-system)
mm-auto-save-coding-system)))
(nnmail-find-file newest)))
(with-current-buffer nntp-server-buffer
(goto-char (point-min))
;; If there's a mail header separator in this file,
;; we remove it.
(when (re-search-forward
(concat "^" (regexp-quote mail-header-separator) "$") nil t)
(replace-match "" t t)))
t))))
(deffoo nndraft-request-restore-buffer (article &optional group server)
"Request a new buffer that is restored to the state of ARTICLE."
(nndraft-possibly-change-group group)
(when (nndraft-request-article article group server (current-buffer))
(message-remove-header "xref")
(message-remove-header "lines")
;; Articles in nndraft:queue are considered as sent messages. The
;; Date field should be the time when they are sent.
;;(message-remove-header "date")
t))
(deffoo nndraft-request-update-info (group info &optional server)
(nndraft-possibly-change-group group)
(gnus-info-set-read
info
(gnus-update-read-articles (gnus-group-prefixed-name group '(nndraft ""))
(nndraft-articles) t))
(let ((marks (nth 3 info)))
(when marks
;; Nix out all marks except the `unsend'-able article marks.
(setcar (nthcdr 3 info)
(if (assq 'unsend marks)
(list (assq 'unsend marks))
nil))))
t)
(defun nndraft-generate-headers ()
(save-excursion
(message-generate-headers
(message-headers-to-generate
nndraft-required-headers message-draft-headers nil))))
(deffoo nndraft-request-associate-buffer (group)
"Associate the current buffer with some article in the draft group."
(nndraft-open-server "")
(nndraft-request-group group)
(nndraft-possibly-change-group group)
(let ((gnus-verbose-backends nil)
(buf (current-buffer))
article file)
(with-temp-buffer
(insert-buffer-substring buf)
(setq article (nndraft-request-accept-article
group (nnoo-current-server 'nndraft) t 'noinsert)
file (nndraft-article-filename article)))
(setq buffer-file-name (expand-file-name file)
buffer-auto-save-file-name (make-auto-save-file-name))
(clear-visited-file-modtime)
(let ((hook (if (boundp 'write-contents-functions)
'write-contents-functions
'write-contents-hooks)))
(gnus-make-local-hook hook)
(add-hook hook 'nndraft-generate-headers nil t))
article))
(deffoo nndraft-request-group (group &optional server dont-check info)
(nndraft-possibly-change-group group)
(unless dont-check
(let* ((pathname (nnmail-group-pathname group nndraft-directory))
(file-name-coding-system nnmail-pathname-coding-system)
dir file)
(nnheader-re-read-dir pathname)
(setq dir (mapcar (lambda (name) (string-to-number (substring name 1)))
(ignore-errors (directory-files
pathname nil "^#[0-9]+#$" t))))
(dolist (n dir)
(unless (file-exists-p
(setq file (expand-file-name (int-to-string n) pathname)))
(rename-file (nndraft-auto-save-file-name file) file)))))
(nnoo-parent-function 'nndraft
'nnmh-request-group
(list group server dont-check)))
(deffoo nndraft-request-move-article (article group server accept-form
&optional last move-is-internal)
(nndraft-possibly-change-group group)
(let ((buf (get-buffer-create " *nndraft move*"))
result)
(and
(nndraft-request-article article group server)
(with-current-buffer buf
(erase-buffer)
(insert-buffer-substring nntp-server-buffer)
(setq result (eval accept-form))
(kill-buffer (current-buffer))
result)
(null (nndraft-request-expire-articles (list article) group server 'force))
result)))
(deffoo nndraft-request-expire-articles (articles group &optional server force)
(nndraft-possibly-change-group group)
(let* ((nnmh-allow-delete-final t)
(nnmail-expiry-target
(or (gnus-group-find-parameter
(gnus-group-prefixed-name group (list 'nndraft server))
'expiry-target t)
nnmail-expiry-target))
(res (nnoo-parent-function 'nndraft
'nnmh-request-expire-articles
(list articles group server force)))
article)
;; Delete all the "state" files of articles that have been expired.
(while articles
(unless (memq (setq article (pop articles)) res)
(let ((auto (nndraft-auto-save-file-name
(nndraft-article-filename article))))
(when (file-exists-p auto)
(funcall nnmail-delete-file-function auto)))
(dolist (backup
(let ((kept-new-versions 1)
(kept-old-versions 0))
(find-backup-file-name
(nndraft-article-filename article))))
(when (file-exists-p backup)
(funcall nnmail-delete-file-function backup)))))
res))
(deffoo nndraft-request-accept-article (group &optional server last noinsert)
(nndraft-possibly-change-group group)
(let ((gnus-verbose-backends nil))
(nnoo-parent-function 'nndraft 'nnmh-request-accept-article
(list group server last noinsert))))
(deffoo nndraft-request-replace-article (article group buffer)
(nndraft-possibly-change-group group)
(let ((nnmail-file-coding-system
(if (member group '("drafts" "delayed"))
message-draft-coding-system
mm-text-coding-system)))
(nnoo-parent-function 'nndraft 'nnmh-request-replace-article
(list article group buffer))))
(deffoo nndraft-request-create-group (group &optional server args)
(nndraft-possibly-change-group group)
(if (file-exists-p nndraft-current-directory)
(if (file-directory-p nndraft-current-directory)
t
nil)
(condition-case ()
(progn
(gnus-make-directory nndraft-current-directory)
t)
(file-error nil))))
;;; Low-Level Interface
(defun nndraft-possibly-change-group (group)
(when (and group
(not (equal group nndraft-current-group)))
(nndraft-open-server "")
(setq nndraft-current-group group)
(setq nndraft-current-directory
(nnheader-concat nndraft-directory group))))
(defun nndraft-article-filename (article &rest args)
(apply 'concat
(file-name-as-directory nndraft-current-directory)
(int-to-string article)
args))
(defun nndraft-auto-save-file-name (file)
(save-excursion
(prog1
(progn
(set-buffer (get-buffer-create " *draft tmp*"))
(setq buffer-file-name file)
(make-auto-save-file-name))
(kill-buffer (current-buffer)))))
(defun nndraft-articles ()
"Return the list of messages in the group."
(gnus-make-directory nndraft-current-directory)
(sort
(mapcar 'string-to-number
(directory-files nndraft-current-directory nil "\\`[0-9]+\\'" t))
'<))
(nnoo-import nndraft
(nnmh
nnmh-retrieve-headers
nnmh-request-group
nnmh-close-group
nnmh-request-list
nnmh-request-newsgroups))
(provide 'nndraft)
;;; nndraft.el ends here
|
