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+;;; USENET news poster/mailer for GNU Emacs
+;; Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
+
+;; 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;; moved posting and mail code from rnews.el
+;;	tower@prep.ai.mit.edu Wed Oct 29 1986
+;; brought posting code almost up to the revision of RFC 850 for News 2.11
+;; - couldn't see handling the special meaning of the Keyword: poster
+;; - not worth the code space to support the old A news Title: (which
+;;   Subject: replaced) and Article-I.D.: (which Message-ID: replaced)
+;;	tower@prep Nov 86
+;; changed C-c C-r key-binding due to rename of news-caesar-buffer-body
+;;	tower@prep 21 Nov 86
+;; added (require 'rnews)	tower@prep 22 Apr 87
+;; restricted call of news-show-all-headers in news-post-news & news-reply
+;;	tower@prep 28 Apr 87
+;; commented out Posting-Front-End to save USENET bytes tower@prep Jul 31 87
+;; commented out -n and -t args in news-inews     tower@prep 15 Oct 87
+(require 'sendmail)
+(require 'rnews)
+
+;Now in paths.el.
+;(defvar news-inews-program "inews"
+;  "Function to post news.")
+
+;; Replying and posting news items are done by these functions.
+;; imported from rmail and modified to work with rnews ...
+;; Mon Mar 25,1985 at 03:07:04 ads@mit-hermes.
+;; this is done so that rnews can operate independently from rmail.el and
+;; sendmail and dosen't have to autoload these functions.
+;;
+;;; >> Nuked by Mly to autoload those functions again, as the duplication of
+;;; >>  code was making maintenance too difficult.
+
+(defvar news-reply-mode-map () "Mode map used by news-reply.")
+
+(or news-reply-mode-map
+    (progn
+      (setq news-reply-mode-map (make-keymap))
+      (define-key news-reply-mode-map "\C-c?" 'describe-mode)
+      (define-key news-reply-mode-map "\C-c\C-f\C-d" 'news-reply-distribution)
+      (define-key news-reply-mode-map "\C-c\C-f\C-k" 'news-reply-keywords)
+      (define-key news-reply-mode-map "\C-c\C-f\C-n" 'news-reply-newsgroups)
+      (define-key news-reply-mode-map "\C-c\C-f\C-f" 'news-reply-followup-to)
+      (define-key news-reply-mode-map "\C-c\C-f\C-s" 'mail-subject)
+      (define-key news-reply-mode-map "\C-c\C-f\C-a" 'news-reply-summary)
+      (define-key news-reply-mode-map "\C-c\C-r" 'news-caesar-buffer-body)
+      (define-key news-reply-mode-map "\C-c\C-w" 'news-reply-signature)
+      (define-key news-reply-mode-map "\C-c\C-y" 'news-reply-yank-original)
+      (define-key news-reply-mode-map "\C-c\C-q" 'mail-fill-yanked-message)
+      (define-key news-reply-mode-map "\C-c\C-c" 'news-inews)
+      (define-key news-reply-mode-map "\C-c\C-s" 'news-inews)))
+
+(defun news-reply-mode ()
+  "Major mode for editing news to be posted on USENET.
+First-time posters are asked to please read the articles in newsgroup:
+                                                     news.announce.newusers .
+Like Text Mode but with these additional commands:
+
+C-c C-s  news-inews (post the message)    C-c C-c  news-inews
+C-c C-f	 move to a header field (and create it if there isn't):
+	 C-c C-f C-n  move to Newsgroups:	C-c C-f C-s  move to Subj:
+	 C-c C-f C-f  move to Followup-To:      C-c C-f C-k  move to Keywords:
+	 C-c C-f C-d  move to Distribution:	C-c C-f C-a  move to Summary:
+C-c C-y  news-reply-yank-original (insert current message, in NEWS).
+C-c C-q  mail-fill-yanked-message (fill what was yanked).
+C-c C-r  caesar rotate all letters by 13 places in the article's body (rot13)."
+  (interactive)
+  ;; require...
+  (or (fboundp 'mail-setup) (load "sendmail"))
+  (kill-all-local-variables)
+  (make-local-variable 'mail-reply-buffer)
+  (setq mail-reply-buffer nil)
+  (set-syntax-table text-mode-syntax-table)
+  (use-local-map news-reply-mode-map)
+  (setq local-abbrev-table text-mode-abbrev-table)
+  (setq major-mode 'news-reply-mode)
+  (setq mode-name "News")
+  (make-local-variable 'paragraph-separate)
+  (make-local-variable 'paragraph-start)
+  (setq paragraph-start (concat "^" mail-header-separator "$\\|"
+				paragraph-start))
+  (setq paragraph-separate (concat "^" mail-header-separator "$\\|"
+				   paragraph-separate))
+  (run-hooks 'text-mode-hook 'news-reply-mode-hook))
+
+(defvar news-reply-yank-from
+  "Save From: field for news-reply-yank-original."
+  "")
+
+(defvar news-reply-yank-message-id
+  "Save Message-Id: field for news-reply-yank-original."
+  "")
+
+(defun news-reply-yank-original (arg)
+  "Insert the message being replied to, if any (in rmail).
+Puts point before the text and mark after.
+Indents each nonblank line ARG spaces (default 3).
+Just \\[universal-argument] as argument means don't indent
+and don't delete any header fields."
+  (interactive "P")
+  (mail-yank-original arg)
+  (exchange-point-and-mark)
+  (run-hooks 'news-reply-header-hook))
+
+(defvar news-reply-header-hook
+  '(lambda ()
+	 (insert "In article " news-reply-yank-message-id
+			 " " news-reply-yank-from " writes:\n\n"))
+  "Hook for inserting a header at the top of a yanked message.")
+
+(defun news-reply-newsgroups ()
+  "Move point to end of Newsgroups: field.
+RFC 850 constrains the Newsgroups: field to be a comma separated list of valid
+newsgroups names at your site:
+Newsgroups: news.misc,comp.misc,rec.misc"
+  (interactive)
+  (expand-abbrev)
+  (goto-char (point-min))
+  (mail-position-on-field "Newsgroups"))
+
+(defun news-reply-followup-to ()
+  "Move point to end of Followup-To: field.  Create the field if none.
+One usually requests followups to only one newsgroup.
+RFC 850 constrains the Followup-To: field to be a comma separated list of valid
+newsgroups names at your site, that are also in the Newsgroups: field:
+Newsgroups: news.misc,comp.misc,rec.misc,misc.misc,soc.misc
+Followup-To: news.misc,comp.misc,rec.misc"
+  (interactive)
+  (expand-abbrev)
+  (or (mail-position-on-field "Followup-To" t)
+      (progn (mail-position-on-field "newsgroups")
+	     (insert "\nFollowup-To: ")))
+	 ;; @@ could do a completing read based on the Newsgroups: field to
+	 ;; @@ fill in the Followup-To: field
+)
+
+(defun news-reply-distribution ()
+  "Move point to end of Distribution: optional field.
+Create the field if none.  Without this field the posting goes to all of
+USENET.  The field is used to restrict the posting to parts of USENET."
+  (interactive)
+  (expand-abbrev)
+  (mail-position-on-field "Distribution")
+  ;; @@could do a completing read based on the news library file:
+  ;; @@    ../distributions  to fill in the field.
+  )
+
+(defun news-reply-keywords ()
+  "Move point to end of Keywords: optional field.  Create the field if none.
+Used as an aid to the news reader, it can contain a few, well selected keywords
+identifying the message."
+  (interactive)
+  (expand-abbrev)
+  (mail-position-on-field "Keywords"))
+
+(defun news-reply-summary ()
+  "Move point to end of Summary: optional field.  Create the field if none.
+Used as an aid to the news reader, it can contain a succinct
+summary (abstract) of the message."
+  (interactive)
+  (expand-abbrev)
+  (mail-position-on-field "Summary"))
+
+(defun news-reply-signature ()
+  "The inews program appends ~/.signature automatically."
+  (interactive)
+  (message "~/.signature will be appended automatically."))
+
+(defun news-setup (to subject in-reply-to newsgroups replybuffer)
+  "Setup the news reply or posting buffer with the proper headers and in
+news-reply-mode."
+  (setq mail-reply-buffer replybuffer)
+  (let ((mail-setup-hook nil))
+    (if (null to)
+	;; this hack is needed so that inews wont be confused by 
+	;; the fcc: and bcc: fields
+	(let ((mail-self-blind nil)
+	      (mail-archive-file-name nil))
+	  (mail-setup to subject in-reply-to nil replybuffer nil)
+	  (beginning-of-line)
+	  (kill-line 1)
+	  (goto-char (point-max)))
+      (mail-setup to subject in-reply-to nil replybuffer nil))
+    ;;;(mail-position-on-field "Posting-Front-End")
+    ;;;(insert (emacs-version))
+    (goto-char (point-max))
+    (if (let ((case-fold-search t))
+	  (re-search-backward "^Subject:" (point-min) t))
+	(progn (beginning-of-line)
+	       (insert "Newsgroups: " (or newsgroups "") "\n")
+	       (if (not newsgroups)
+		   (backward-char 1)
+		 (goto-char (point-max)))))
+    (run-hooks 'news-setup-hook)))
+   
+(defun news-inews ()
+  "Send a news message using inews."
+  (interactive)
+  (let* (newsgroups subject
+		    (case-fold-search nil))
+    (save-excursion
+      (save-restriction
+	(goto-char (point-min))
+	(search-forward (concat "\n" mail-header-separator "\n"))
+	(narrow-to-region (point-min) (point))
+	(setq newsgroups (mail-fetch-field "newsgroups")
+	      subject (mail-fetch-field "subject")))
+      (widen)
+      (goto-char (point-min))
+      (run-hooks 'news-inews-hook)
+      (goto-char (point-min))
+      (search-forward (concat "\n" mail-header-separator "\n"))
+      (replace-match "\n\n")
+      (goto-char (point-max))
+      ;; require a newline at the end for inews to append .signature to
+      (or (= (preceding-char) ?\n)
+	  (insert ?\n))
+      (message "Posting to USENET...")
+      (call-process-region (point-min) (point-max) 
+			   news-inews-program nil 0 nil
+			   "-h")	; take all header lines!
+			   ;@@ setting of subject and newsgroups still needed?
+			   ;"-t" subject
+			   ;"-n" newsgroups
+      (message "Posting to USENET... done")
+      (goto-char (point-min))		;restore internal header separator
+      (search-forward "\n\n")
+      (replace-match (concat "\n" mail-header-separator "\n"))
+      (set-buffer-modified-p nil))
+    (and (fboundp 'bury-buffer) (bury-buffer))))
+
+;@@ shares some code with news-reply and news-post-news
+(defun news-mail-reply ()
+  "Mail a reply to the author of the current article.
+While composing the reply, use \\[news-reply-yank-original] to yank the
+original message into it."
+  (interactive)
+  (let (from cc subject date to reply-to
+	     (buffer (current-buffer)))
+    (save-restriction
+      (narrow-to-region (point-min) (progn (goto-line (point-min))
+					   (search-forward "\n\n")
+					   (- (point) 1)))
+      (setq from (mail-fetch-field "from")
+	    subject (mail-fetch-field "subject")
+	    reply-to (mail-fetch-field "reply-to")
+	    date (mail-fetch-field "date"))
+      (setq to from)
+      (pop-to-buffer "*mail*")
+      (mail nil
+	    (if reply-to reply-to to)
+	    subject
+	    (let ((stop-pos (string-match "  *at \\|  *@ \\| *(\\| *<" from)))
+	      (concat (if stop-pos (substring from 0 stop-pos) from)
+		      "'s message of "
+		      date))
+	    nil
+	   buffer))))
+
+;@@ the guts of news-reply and news-post-news should be combined. -tower
+(defun news-reply ()
+  "Compose and post a reply (aka a followup) to the current article on USENET.
+While composing the followup, use \\[news-reply-yank-original] to yank the
+original message into it."
+  (interactive)
+  (if (y-or-n-p "Are you sure you want to followup to all of USENET? ")
+      (let (from cc subject date to followup-to newsgroups message-of
+		 references distribution message-id
+		 (buffer (current-buffer)))
+	(save-restriction
+	  (and (not (= 0 (buffer-size))) ;@@real problem is non-existence of
+					;@@	of article file
+	       (equal major-mode 'news-mode) ;@@ if rmail-mode,
+					;@@	should show full headers
+	       (progn
+		 (news-show-all-headers) ;@@ should save/restore header state,
+					;@@	but rnews.el lacks support
+		 (narrow-to-region (point-min) (progn (goto-char (point-min))
+						      (search-forward "\n\n")
+						      (- (point) 1)))))
+	  (setq from (mail-fetch-field "from")
+		news-reply-yank-from from
+		;; @@ not handling old Title: field
+		subject (mail-fetch-field "subject")
+		date (mail-fetch-field "date")
+		followup-to (mail-fetch-field "followup-to")
+		newsgroups (or followup-to
+			       (mail-fetch-field "newsgroups"))
+		references (mail-fetch-field "references")
+		;; @@ not handling old Article-I.D.: field
+		distribution (mail-fetch-field "distribution")
+		message-id (mail-fetch-field "message-id")
+		news-reply-yank-message-id message-id)
+	  (pop-to-buffer "*post-news*")
+	  (news-reply-mode)
+	  (if (and (buffer-modified-p)
+		   (not
+		    (y-or-n-p "Unsent article being composed; erase it? ")))
+	      ()
+	    (progn
+	      (erase-buffer)
+	      (and subject
+		   (progn (if (string-match "\\`Re: " subject)
+			      (while (string-match "\\`Re: " subject)
+				(setq subject (substring subject 4))))
+			  (setq subject (concat "Re: " subject))))
+	      (and from
+		   (progn
+		     (let ((stop-pos
+			    (string-match "  *at \\|  *@ \\| *(\\| *<" from)))
+		       (setq message-of
+			     (concat
+			      (if stop-pos (substring from 0 stop-pos) from)
+			      "'s message of "
+			      date)))))
+	      (news-setup
+	       nil
+	       subject
+	       message-of
+	       newsgroups
+	       buffer)
+	      (if followup-to
+		  (progn (news-reply-followup-to)
+			 (insert followup-to)))
+	      (if distribution
+		  (progn
+		    (mail-position-on-field "Distribution")
+		    (insert distribution)))
+	      (mail-position-on-field "References")
+	      (if references
+		  (insert references))
+	      (if (and references message-id)
+		  (insert " "))
+	      (if message-id
+		  (insert message-id))
+	      (goto-char (point-max))))))
+    (message "")))
+
+;@@ the guts of news-reply and news-post-news should be combined. -tower
+(defun news-post-news ()
+  "Begin editing a new USENET news article to be posted.
+Type \\[describe-mode] once editing the article to get a list of commands."
+  (interactive)
+  (if (y-or-n-p "Are you sure you want to post to all of USENET? ")
+      (let ((buffer (current-buffer)))
+	(save-restriction
+	  (and (not (= 0 (buffer-size))) ;@@real problem is non-existence of
+					;@@	of article file
+	       (equal major-mode 'news-mode) ;@@ if rmail-mode,
+					;@@	should show full headers
+	       (progn
+		 (news-show-all-headers) ;@@ should save/restore header state,
+					;@@	but rnews.el lacks support
+		 (narrow-to-region (point-min) (progn (goto-char (point-min))
+						      (search-forward "\n\n")
+						      (- (point) 1)))))
+	  (setq news-reply-yank-from (mail-fetch-field "from")
+		;; @@ not handling old Article-I.D.: field
+		news-reply-yank-message-id (mail-fetch-field "message-id")))
+	(pop-to-buffer "*post-news*")
+	(news-reply-mode)
+	(if (and (buffer-modified-p)
+		 (not (y-or-n-p "Unsent article being composed; erase it? ")))
+	    ()				;@@ not saving point from last time
+	  (progn (erase-buffer)
+		 (news-setup () () () () buffer))))
+  (message "")))
+
+(defun news-mail-other-window ()
+  "Send mail in another window.
+While composing the message, use \\[news-reply-yank-original] to yank the
+original message into it."
+  (interactive)
+  (mail-other-window nil nil nil nil nil (current-buffer)))