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+;;; nndb.el --- nndb access for Gnus
+;; Copyright (C) 1996 Free Software Foundation, Inc.
+
+;; Author: Kai Grossjohann <grossjohann@ls6.informatik.uni-dortmund.de>
+;; 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:
+
+;; I have shamelessly snarfed the code of nntp.el from sgnus.
+;;              Kai
+
+
+;;-
+;; Register nndb with known select methods.
+
+(setq gnus-valid-select-methods
+      (cons '("nndb" mail address respool prompt-address)
+            gnus-valid-select-methods))
+
+
+;;; Code:
+
+(require 'nnheader)
+(require 'nntp)
+(eval-when-compile (require 'cl))
+
+(eval-and-compile
+  (unless (fboundp 'open-network-stream)
+    (require 'tcp)))
+
+(eval-when-compile (require 'cl))
+
+(eval-and-compile
+  (autoload 'news-setup "rnewspost")
+  (autoload 'news-reply-mode "rnewspost")
+  (autoload 'cancel-timer "timer")
+  (autoload 'telnet "telnet" nil t)
+  (autoload 'telnet-send-input "telnet" nil t)
+  (autoload 'timezone-parse-date "timezone"))
+
+;; Declare nndb as derived from nntp
+
+(nnoo-declare nndb nntp)
+
+;; Variables specific to nndb
+
+;;- currently not used but just in case...
+(defvoo nndb-deliver-program "nndel"
+  "*The program used to put a message in an NNDB group.")
+
+;; Variables copied from nntp
+
+(defvoo nndb-server-opened-hook '(nntp-send-authinfo-from-file)
+  "Like nntp-server-opened-hook."
+  nntp-server-opened-hook)
+
+;(defvoo nndb-rlogin-parameters '("telnet" "${NNDBSERVER:=localhost}" "9000")
+;  "*Parameters to nndb-open-login.  Like nntp-rlogin-parameters."
+;  nntp-rlogin-parameters)
+
+;(defvoo nndb-rlogin-user-name nil
+;  "*User name for rlogin connect method."
+;  nntp-rlogin-user-name)
+
+(defvoo nndb-address "localhost"
+  "*The name of the NNDB server."
+  nntp-address)
+
+(defvoo nndb-port-number 9000
+  "*Port number to connect to."
+  nntp-port-number)
+
+;(defvoo nndb-current-group ""
+;  "Like nntp-current-group."
+;  nntp-current-group)
+
+(defvoo nndb-status-string nil "" nntp-status-string)
+
+
+
+(defconst nndb-version "nndb 0.3"
+  "Version numbers of this version of NNDB.")
+
+
+;;; Interface functions.
+
+(nnoo-define-basics nndb)
+
+;; Import other stuff from nntp as is.
+
+(nnoo-import nndb
+  (nntp))
+
+;;- maybe this should be mail??
+;;-(defun nndb-request-type (group &optional article)
+;;-  'news)
+
+;;------------------------------------------------------------------
+;;- only new stuff below
+
+; nndb-request-update-info does not exist and is not needed
+
+; nndb-request-update-mark does not exist and is not needed
+
+; nndb-request-scan does not exist
+; get new mail from somewhere -- maybe this is not needed?
+; --> todo
+
+(deffoo nndb-request-create-group (group &optional server)
+  "Creates a group if it doesn't exist yet."
+  (nntp-send-command "^[23].*\n" "MKGROUP" group))
+
+; todo -- use some other time than the creation time of the article
+; best is time since article has been marked as expirable
+(deffoo nndb-request-expire-articles
+  (articles &optional group server force)
+  "Expires ARTICLES from GROUP on SERVER.
+If FORCE, delete regardless of exiration date, otherwise use normal
+expiry mechanism."
+  (let (msg art)
+    (nntp-possibly-change-server group server) ;;-
+    (while articles
+      (setq art (pop articles))
+      (nntp-send-command "^\\([23]\\|^423\\).*\n" "DATE" art)
+      (setq msg (nndb-status-message))
+      ;; CCC we shouldn't be using the variable nndb-status-string?
+      (if (string-match "^423" (nnheader-get-report 'nndb))
+          ()
+        (or (string-match "\\([0-9]+\\) \\([0-9]+\\)$" msg)
+            (error "Not a valid response for DATE command: %s"
+                   msg))
+        (if (nnmail-expired-article-p
+             group
+             (list (string-to-int
+                    (substring msg (match-beginning 1) (match-end 1)))
+                   (string-to-int
+                    (substring msg (match-beginning 2) (match-end 2))))
+             force)
+            (nnheader-message 5 "Deleting article %s in %s..."
+                              art group)
+          (nntp-send-command "^[23].*\n" "DELETE" art))))))
+
+(deffoo nndb-request-move-article
+  (article group server accept-form &optional last)
+  "Move ARTICLE (a number) from GROUP on SERVER.
+Evals ACCEPT-FORM in current buffer, where the article is.
+Optional LAST is ignored."
+  (let ((artbuf (get-buffer-create " *nndb move*"))
+	result)
+    (and
+     (nndb-request-article article group server artbuf)
+     (save-excursion
+       (set-buffer artbuf)
+       (setq result (eval accept-form))
+       (kill-buffer (current-buffer))
+       result)
+     (nndb-request-expire-articles (list article)
+                                   group
+                                   server
+                                   t))
+    result))
+  
+(deffoo nndb-request-accept-article (group server &optional last)
+  "The article in the current buffer is put into GROUP."
+  (nntp-possibly-change-server group server) ;;-
+  (let (art statmsg)
+    (when (nntp-send-command "^[23].*\r?\n" "ACCEPT" group)
+      (nnheader-insert "")
+      (nntp-encode-text)
+      (nntp-send-region-to-server (point-min) (point-max))
+      ;; 1.2a NNTP's post command is buggy. "^M" (\r) is not
+      ;;  appended to end of the status message.
+      (nntp-wait-for-response "^[23].*\n")
+      (setq statmsg (nntp-status-message))
+      (or (string-match "^\\([0-9]+\\)" statmsg)
+          (error "nndb: %s" statmsg))
+      (setq art (substring statmsg
+                           (match-beginning 1)
+                           (match-end 1)))
+      (message "nndb: accepted %s" art)
+      (list art))))
+
+(deffoo nndb-request-replace-article (article group buffer)
+  "ARTICLE is the number of the article in GROUP to be replaced 
+with the contents of the BUFFER."
+  (set-buffer buffer)
+  (let (art statmsg)
+    (when (nntp-send-command "^[23].*\r?\n" "REPLACE" (int-to-string article))
+      (nnheader-insert "")
+      (nntp-encode-text)
+      (nntp-send-region-to-server (point-min) (point-max))
+      ;; 1.2a NNTP's post command is buggy. "^M" (\r) is not
+      ;;  appended to end of the status message.
+      (nntp-wait-for-response "^[23].*\n")
+;      (setq statmsg (nntp-status-message))
+;      (or (string-match "^\\([0-9]+\\)" statmsg)
+;          (error "nndb: %s" statmsg))
+;      (setq art (substring statmsg
+;                           (match-beginning 1)
+;                           (match-end 1)))
+;      (message "nndb: replaced %s" art)
+      (list (int-to-string article)))))
+
+; nndb-request-delete-group does not exist
+; todo -- maybe later
+
+; nndb-request-rename-group does not exist
+; todo -- maybe later
+
+(provide 'nndb)
+
+