[bpt/emacs.git] / lisp / gnus / nndraft.el

;;; nndraft.el --- draft article access for Gnus

;; Copyright (C) 1995-2014 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 'gnus-group)
(require 'nnmh)
(require 'nnoo)
(require 'mm-util)
(eval-when-compile (require 'cl))

;; The nnoo-import at the end, I think.
(declare-function nndraft-request-list "nndraft" (&rest args) t)

(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'.")

\f

(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)

\f

;;; 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))))

(defun nndraft-update-unread-articles ()
  "Update groups' unread articles in the group buffer."
  (nndraft-request-list)
  (with-current-buffer gnus-group-buffer
    (let* ((groups (mapcar (lambda (elem)
			     (gnus-group-prefixed-name (car elem)
						       (list 'nndraft "")))
			   (nnmail-get-active)))
	   (gnus-group-marked (copy-sequence groups))
	   ;; Don't send delayed articles.
	   (gnus-get-new-news-hook nil)
	   (inhibit-read-only t))
      (gnus-group-get-new-news-this-group nil t)
      (save-excursion
	(dolist (group groups)
	  (unless (and gnus-permanently-visible-groups
		       (string-match gnus-permanently-visible-groups
				     group))
	    (gnus-group-goto-group group)
	    (when (zerop (gnus-group-group-unread))
	      (gnus-delete-line))))))))

(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))
    (gnus-make-local-hook 'after-save-hook)
    (add-hook 'after-save-hook 'nndraft-update-unread-articles nil t)
    (message-add-action '(nndraft-update-unread-articles)
			'exit 'postpone 'kill)
    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 'delete)
	 ;; FIXME: If we want to move a draft message to an expiry group,
	 ;; there are things to have to improve:
	 ;; - Remove a header separator.
	 ;; - Encode it, including attachments, into a MIME message.
	 ;;(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))))

\f
;;; 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))

(provide 'nndraft)

;;; nndraft.el ends here
Commit	Line	Data
eec82323	1	;;; nndraft.el --- draft article access for Gnus
23f87bed	2
ba318903	3	;; Copyright (C) 1995-2014 Free Software Foundation, Inc.
eec82323	4
6748645f	5	;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
eec82323 LMI	6	;; Keywords: news
	7
	8	;; This file is part of GNU Emacs.
	9
5e809f55	10	;; GNU Emacs is free software: you can redistribute it and/or modify
eec82323	11	;; it under the terms of the GNU General Public License as published by
5e809f55 GM	12	;; the Free Software Foundation, either version 3 of the License, or
5e809f55 GM	13	;; (at your option) any later version.
eec82323 LMI	14
	15	;; GNU Emacs is distributed in the hope that it will be useful,
	16	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	;; GNU General Public License for more details.
	19
	20	;; You should have received a copy of the GNU General Public License
5e809f55	21	;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
eec82323 LMI	22
	23	;;; Commentary:
	24
	25	;;; Code:
	26
	27	(require 'nnheader)
6748645f LMI	28	(require 'nnmail)
6748645f LMI	29	(require 'gnus-start)
8db5f662	30	(require 'gnus-group)
eec82323 LMI	31	(require 'nnmh)
eec82323 LMI	32	(require 'nnoo)
16409b0b	33	(require 'mm-util)
23f87bed	34	(eval-when-compile (require 'cl))
eec82323	35
5261b92e GM	36	;; The nnoo-import at the end, I think.
5261b92e GM	37	(declare-function nndraft-request-list "nndraft" (&rest args) t)
8db5f662	38
6748645f LMI	39	(nnoo-declare nndraft
6748645f LMI	40	nnmh)
eec82323	41
6748645f LMI	42	(defvoo nndraft-directory (nnheader-concat gnus-directory "drafts/")
	43	"Where nndraft will store its files."
	44	nnmh-directory)
eec82323	45
01c52d31 MB	46	(defvar nndraft-required-headers '(Date)
	47	"*Headers to be generated when saving a draft message.
	48	The headers in this variable and the ones in `message-required-headers'
	49	are generated if and only if they are also in `message-draft-headers'.")
	50
eec82323 LMI	51	\f
eec82323 LMI	52
6748645f LMI	53	(defvoo nndraft-current-group "" nil nnmh-current-group)
	54	(defvoo nndraft-get-new-mail nil nil nnmh-get-new-mail)
	55	(defvoo nndraft-current-directory nil nil nnmh-current-directory)
	56
eec82323	57	(defconst nndraft-version "nndraft 1.0")
6748645f	58	(defvoo nndraft-status-string "" nil nnmh-status-string)
eec82323 LMI	59
	60	\f
	61
	62	;;; Interface functions.
	63
	64	(nnoo-define-basics nndraft)
	65
6748645f LMI	66	(deffoo nndraft-open-server (server &optional defs)
	67	(nnoo-change-server 'nndraft server defs)
	68	(cond
	69	((not (file-exists-p nndraft-directory))
	70	(nndraft-close-server)
	71	(nnheader-report 'nndraft "No such file or directory: %s"
	72	nndraft-directory))
	73	((not (file-directory-p (file-truename nndraft-directory)))
	74	(nndraft-close-server)
	75	(nnheader-report 'nndraft "Not a directory: %s" nndraft-directory))
	76	(t
	77	(nnheader-report 'nndraft "Opened server %s using directory %s"
	78	server nndraft-directory)
	79	t)))
	80
eec82323	81	(deffoo nndraft-retrieve-headers (articles &optional group server fetch-old)
6748645f	82	(nndraft-possibly-change-group group)
20a673b2	83	(with-current-buffer nntp-server-buffer
eec82323	84	(erase-buffer)
758845a0	85	(let (article lines chars)
eec82323 LMI	86	;; We don't support fetching by Message-ID.
	87	(if (stringp (car articles))
	88	'headers
	89	(while articles
16409b0b	90	(narrow-to-region (point) (point))
eec82323 LMI	91	(when (nndraft-request-article
	92	(setq article (pop articles)) group server (current-buffer))
	93	(goto-char (point-min))
	94	(if (search-forward "\n\n" nil t)
	95	(forward-line -1)
	96	(goto-char (point-max)))
758845a0 LMI	97	(setq lines (count-lines (point) (point-max))
758845a0 LMI	98	chars (- (point-max) (point)))
eec82323	99	(delete-region (point) (point-max))
16409b0b	100	(goto-char (point-min))
eec82323	101	(insert (format "221 %d Article retrieved.\n" article))
758845a0	102	(insert (format "Lines: %d\nChars: %d\n" lines chars))
16409b0b GM	103	(widen)
16409b0b GM	104	(goto-char (point-max))
eec82323 LMI	105	(insert ".\n")))
	106
	107	(nnheader-fold-continuation-lines)
	108	'headers))))
	109
eec82323	110	(deffoo nndraft-request-article (id &optional group server buffer)
6748645f	111	(nndraft-possibly-change-group group)
eec82323 LMI	112	(when (numberp id)
	113	;; We get the newest file of the auto-saved file and the
	114	;; "real" file.
	115	(let* ((file (nndraft-article-filename id))
	116	(auto (nndraft-auto-save-file-name file))
	117	(newest (if (file-newer-than-file-p file auto) file auto))
	118	(nntp-server-buffer (or buffer nntp-server-buffer)))
	119	(when (and (file-exists-p newest)
16409b0b GM	120	(let ((nnmail-file-coding-system
16409b0b GM	121	(if (file-newer-than-file-p file auto)
23f87bed	122	(if (member group '("drafts" "delayed"))
16409b0b GM	123	message-draft-coding-system
	124	mm-text-coding-system)
	125	mm-auto-save-coding-system)))
	126	(nnmail-find-file newest)))
20a673b2	127	(with-current-buffer nntp-server-buffer
eec82323 LMI	128	(goto-char (point-min))
	129	;; If there's a mail header separator in this file,
	130	;; we remove it.
	131	(when (re-search-forward
23f87bed	132	(concat "^" (regexp-quote mail-header-separator) "$") nil t)
eec82323 LMI	133	(replace-match "" t t)))
	134	t))))
	135
	136	(deffoo nndraft-request-restore-buffer (article &optional group server)
	137	"Request a new buffer that is restored to the state of ARTICLE."
6748645f LMI	138	(nndraft-possibly-change-group group)
	139	(when (nndraft-request-article article group server (current-buffer))
	140	(message-remove-header "xref")
	141	(message-remove-header "lines")
23f87bed MB	142	;; Articles in nndraft:queue are considered as sent messages. The
	143	;; Date field should be the time when they are sent.
	144	;;(message-remove-header "date")
6748645f	145	t))
eec82323 LMI	146
eec82323 LMI	147	(deffoo nndraft-request-update-info (group info &optional server)
6748645f LMI	148	(nndraft-possibly-change-group group)
	149	(gnus-info-set-read
	150	info
	151	(gnus-update-read-articles (gnus-group-prefixed-name group '(nndraft ""))
	152	(nndraft-articles) t))
16409b0b GM	153	(let ((marks (nth 3 info)))
	154	(when marks
	155	;; Nix out all marks except the `unsend'-able article marks.
6748645f LMI	156	(setcar (nthcdr 3 info)
	157	(if (assq 'unsend marks)
	158	(list (assq 'unsend marks))
	159	nil))))
eec82323 LMI	160	t)
eec82323 LMI	161
23f87bed MB	162	(defun nndraft-generate-headers ()
	163	(save-excursion
	164	(message-generate-headers
	165	(message-headers-to-generate
01c52d31	166	nndraft-required-headers message-draft-headers nil))))
23f87bed	167
30b0f250 KY	168	(defun nndraft-update-unread-articles ()
	169	"Update groups' unread articles in the group buffer."
	170	(nndraft-request-list)
	171	(with-current-buffer gnus-group-buffer
bb9e218d KY	172	(let* ((groups (mapcar (lambda (elem)
	173	(gnus-group-prefixed-name (car elem)
	174	(list 'nndraft "")))
	175	(nnmail-get-active)))
	176	(gnus-group-marked (copy-sequence groups))
39397fad KY	177	;; Don't send delayed articles.
39397fad KY	178	(gnus-get-new-news-hook nil)
bb9e218d KY	179	(inhibit-read-only t))
bb9e218d KY	180	(gnus-group-get-new-news-this-group nil t)
9937bef4 G	181	(save-excursion
	182	(dolist (group groups)
	183	(unless (and gnus-permanently-visible-groups
	184	(string-match gnus-permanently-visible-groups
	185	group))
	186	(gnus-group-goto-group group)
	187	(when (zerop (gnus-group-group-unread))
	188	(gnus-delete-line))))))))
30b0f250	189
eec82323 LMI	190	(deffoo nndraft-request-associate-buffer (group)
eec82323 LMI	191	"Associate the current buffer with some article in the draft group."
6748645f LMI	192	(nndraft-open-server "")
	193	(nndraft-request-group group)
	194	(nndraft-possibly-change-group group)
	195	(let ((gnus-verbose-backends nil)
	196	(buf (current-buffer))
16409b0b GM	197	article file)
	198	(with-temp-buffer
	199	(insert-buffer-substring buf)
6748645f	200	(setq article (nndraft-request-accept-article
16409b0b GM	201	group (nnoo-current-server 'nndraft) t 'noinsert)
	202	file (nndraft-article-filename article)))
	203	(setq buffer-file-name (expand-file-name file)
	204	buffer-auto-save-file-name (make-auto-save-file-name))
eec82323	205	(clear-visited-file-modtime)
4a43ee9b MB	206	(let ((hook (if (boundp 'write-contents-functions)
	207	'write-contents-functions
	208	'write-contents-hooks)))
	209	(gnus-make-local-hook hook)
	210	(add-hook hook 'nndraft-generate-headers nil t))
30b0f250 KY	211	(gnus-make-local-hook 'after-save-hook)
	212	(add-hook 'after-save-hook 'nndraft-update-unread-articles nil t)
	213	(message-add-action '(nndraft-update-unread-articles)
	214	'exit 'postpone 'kill)
eec82323 LMI	215	article))
eec82323 LMI	216
286c4fc2	217	(deffoo nndraft-request-group (group &optional server dont-check info)
23f87bed MB	218	(nndraft-possibly-change-group group)
	219	(unless dont-check
	220	(let* ((pathname (nnmail-group-pathname group nndraft-directory))
	221	(file-name-coding-system nnmail-pathname-coding-system)
	222	dir file)
	223	(nnheader-re-read-dir pathname)
e9bd5782	224	(setq dir (mapcar (lambda (name) (string-to-number (substring name 1)))
23f87bed MB	225	(ignore-errors (directory-files
	226	pathname nil "^#[0-9]+#$" t))))
	227	(dolist (n dir)
	228	(unless (file-exists-p
	229	(setq file (expand-file-name (int-to-string n) pathname)))
	230	(rename-file (nndraft-auto-save-file-name file) file)))))
	231	(nnoo-parent-function 'nndraft
	232	'nnmh-request-group
	233	(list group server dont-check)))
	234
c9fc72fa	235	(deffoo nndraft-request-move-article (article group server accept-form
01c52d31	236	&optional last move-is-internal)
23f87bed MB	237	(nndraft-possibly-change-group group)
	238	(let ((buf (get-buffer-create " nndraft move"))
	239	result)
	240	(and
	241	(nndraft-request-article article group server)
20a673b2	242	(with-current-buffer buf
23f87bed MB	243	(erase-buffer)
	244	(insert-buffer-substring nntp-server-buffer)
	245	(setq result (eval accept-form))
	246	(kill-buffer (current-buffer))
	247	result)
	248	(null (nndraft-request-expire-articles (list article) group server 'force))
	249	result)))
	250
6748645f LMI	251	(deffoo nndraft-request-expire-articles (articles group &optional server force)
	252	(nndraft-possibly-change-group group)
	253	(let* ((nnmh-allow-delete-final t)
115694a3 KY	254	(nnmail-expiry-target 'delete)
	255	;; FIXME: If we want to move a draft message to an expiry group,
	256	;; there are things to have to improve:
	257	;; - Remove a header separator.
	258	;; - Encode it, including attachments, into a MIME message.
	259	;;(nnmail-expiry-target
	260	;; (or (gnus-group-find-parameter
	261	;; (gnus-group-prefixed-name group (list 'nndraft server))
	262	;; 'expiry-target t)
	263	;; nnmail-expiry-target))
6748645f LMI	264	(res (nnoo-parent-function 'nndraft
	265	'nnmh-request-expire-articles
	266	(list articles group server force)))
	267	article)
eec82323 LMI	268	;; Delete all the "state" files of articles that have been expired.
	269	(while articles
	270	(unless (memq (setq article (pop articles)) res)
6748645f	271	(let ((auto (nndraft-auto-save-file-name
eec82323	272	(nndraft-article-filename article))))
eec82323	273	(when (file-exists-p auto)
16409b0b GM	274	(funcall nnmail-delete-file-function auto)))
	275	(dolist (backup
	276	(let ((kept-new-versions 1)
	277	(kept-old-versions 0))
	278	(find-backup-file-name
	279	(nndraft-article-filename article))))
	280	(when (file-exists-p backup)
	281	(funcall nnmail-delete-file-function backup)))))
eec82323 LMI	282	res))
	283
	284	(deffoo nndraft-request-accept-article (group &optional server last noinsert)
6748645f LMI	285	(nndraft-possibly-change-group group)
	286	(let ((gnus-verbose-backends nil))
	287	(nnoo-parent-function 'nndraft 'nnmh-request-accept-article
	288	(list group server last noinsert))))
eec82323	289
16409b0b GM	290	(deffoo nndraft-request-replace-article (article group buffer)
	291	(nndraft-possibly-change-group group)
	292	(let ((nnmail-file-coding-system
23f87bed MB	293	(if (member group '("drafts" "delayed"))
23f87bed MB	294	message-draft-coding-system
16409b0b GM	295	mm-text-coding-system)))
	296	(nnoo-parent-function 'nndraft 'nnmh-request-replace-article
	297	(list article group buffer))))
	298
eec82323	299	(deffoo nndraft-request-create-group (group &optional server args)
6748645f LMI	300	(nndraft-possibly-change-group group)
	301	(if (file-exists-p nndraft-current-directory)
	302	(if (file-directory-p nndraft-current-directory)
eec82323 LMI	303	t
	304	nil)
	305	(condition-case ()
	306	(progn
6748645f	307	(gnus-make-directory nndraft-current-directory)
eec82323 LMI	308	t)
	309	(file-error nil))))
	310
	311	\f
	312	;;; Low-Level Interface
	313
6748645f LMI	314	(defun nndraft-possibly-change-group (group)
	315	(when (and group
	316	(not (equal group nndraft-current-group)))
	317	(nndraft-open-server "")
	318	(setq nndraft-current-group group)
	319	(setq nndraft-current-directory
	320	(nnheader-concat nndraft-directory group))))
eec82323 LMI	321
	322	(defun nndraft-article-filename (article &rest args)
	323	(apply 'concat
6748645f	324	(file-name-as-directory nndraft-current-directory)
eec82323 LMI	325	(int-to-string article)
	326	args))
	327
	328	(defun nndraft-auto-save-file-name (file)
	329	(save-excursion
	330	(prog1
	331	(progn
	332	(set-buffer (get-buffer-create " draft tmp"))
	333	(setq buffer-file-name file)
	334	(make-auto-save-file-name))
	335	(kill-buffer (current-buffer)))))
	336
6748645f LMI	337	(defun nndraft-articles ()
	338	"Return the list of messages in the group."
	339	(gnus-make-directory nndraft-current-directory)
	340	(sort
e9bd5782	341	(mapcar 'string-to-number
6748645f LMI	342	(directory-files nndraft-current-directory nil "\\`[0-9]+\\'" t))
	343	'<))
	344
	345	(nnoo-import nndraft
	346	(nnmh
	347	nnmh-retrieve-headers
	348	nnmh-request-group
	349	nnmh-close-group
394679ff	350	nnmh-request-list))
6748645f	351
eec82323 LMI	352	(provide 'nndraft)
	353
	354	;;; nndraft.el ends here