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Diffstat (limited to 'lisp/nneething.el')
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diff --git a/lisp/nneething.el b/lisp/nneething.el new file mode 100644 index 00000000000..0980c4d13cf --- /dev/null +++ b/lisp/nneething.el @@ -0,0 +1,334 @@ +;;; nneething.el --- random file 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, 675 Mass Ave, Cambridge, MA 02139, USA. + +;;; Commentary: + +;; Based on nnspool.el by Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>. +;; For an overview of what the interface functions do, please see the +;; Gnus sources. + +;;; Code: + +(require 'nnheader) +(require 'nnmail) + +(defvar nneething-map-file-directory "~/.nneething/" + "*Map files directory.") + +(defvar nneething-exclude-files "~$" + "*Regexp saying what files to exclude from the group.") + +(defvar nneething-map-file ".nneething" + "*Name of map files.") + + + +(defconst nneething-version "nneething 1.0" + "nneething version.") + +(defvar nneething-current-directory nil + "Current news group directory.") + +(defvar nneething-status-string "") +(defvar nneething-group-alist nil) + + + +(defvar nneething-directory nil) +(defvar nneething-group nil) +(defvar nneething-map nil) +(defvar nneething-read-only nil) +(defvar nneething-active nil) +(defvar nneething-server-variables + (list + (list 'nneething-directory nneething-directory) + '(nneething-current-directory nil) + '(nneething-status-string "") + '(nneething-group-alist))) + + + +;;; Interface functions. + +(defun nneething-retrieve-headers (sequence &optional newsgroup server) + (nneething-possibly-change-directory newsgroup) + + (save-excursion + (set-buffer nntp-server-buffer) + (erase-buffer) + (let* ((number (length sequence)) + (count 0) + (large (and (numberp nnmail-large-newsgroup) + (> number nnmail-large-newsgroup))) + article file) + + (if (stringp (car sequence)) + 'headers + + (while sequence + (setq article (car sequence)) + (setq file (nneething-file-name article)) + + (if (and (file-exists-p file) + (not (zerop (nth 7 (file-attributes file))))) + (progn + (insert (format "221 %d Article retrieved.\n" article)) + (nneething-insert-head file) + (insert ".\n"))) + + (setq sequence (cdr sequence) + count (1+ count)) + + (and large + (zerop (% count 20)) + (message "nneething: Receiving headers... %d%%" + (/ (* count 100) number)))) + + (and large (message "nneething: Receiving headers...done")) + + ;; Fold continuation lines. + (goto-char (point-min)) + (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t) + (replace-match " " t t)) + 'headers)))) + +(defun nneething-open-server (server &optional defs) + (setq nneething-status-string "") + (nnheader-init-server-buffer)) + +(defun nneething-close-server (&optional server) + t) + +(defun nneething-server-opened (&optional server) + t) + +(defun nneething-status-message (&optional server) + nneething-status-string) + +(defun nneething-request-article (id &optional newsgroup server buffer) + (nneething-possibly-change-directory newsgroup) + (let ((file (if (stringp id) nil (nneething-file-name id))) + (nntp-server-buffer (or buffer nntp-server-buffer))) + (and (stringp file) ; We did not request by Message-ID. + (file-exists-p file) ; The file exists. + (not (file-directory-p file)) ; It's not a dir. + (save-excursion + (nnmail-find-file file) ; Insert the file in the nntp buf. + (or (nnheader-article-p) ; Either it's a real article... + (progn + (goto-char (point-min)) + (nneething-make-head file) ; ... or we fake some headers. + (insert "\n"))) + t)))) + +(defun nneething-request-group (group &optional dir dont-check) + (nneething-possibly-change-directory group dir) + (or dont-check (nneething-create-mapping)) + (save-excursion + (set-buffer nntp-server-buffer) + (erase-buffer) + (if (> (car nneething-active) (cdr nneething-active)) + (insert (format "211 0 1 0 %s\n" group)) + (insert (format "211 %d %d %d %s\n" + (- (1+ (cdr nneething-active)) (car nneething-active)) + (car nneething-active) (cdr nneething-active) + group))) + t)) + +(defun nneething-request-list (&optional server dir) + (save-excursion + (set-buffer nntp-server-buffer) + (erase-buffer)) + nil) + +(defun nneething-request-newgroups (date &optional server) + (save-excursion + (set-buffer nntp-server-buffer) + (erase-buffer)) + nil) + +(defun nneething-request-post (&optional server) + (mail-send-and-exit nil)) + +(defalias 'nneething-request-post-buffer 'nnmail-request-post-buffer) + +(defun nneething-close-group (group &optional server) + t) + + +;;; Internal functions. + +(defun nneething-possibly-change-directory (group &optional dir) + (if (not group) + () + (if (and nneething-group + (string= group nneething-group)) + t + (let (entry) + (if (setq entry (assoc group nneething-group-alist)) + (progn + (setq nneething-group group) + (setq nneething-directory (nth 1 entry)) + (setq nneething-map (nth 2 entry)) + (setq nneething-active (nth 3 entry))) + (setq nneething-group group) + (setq nneething-directory dir) + (setq nneething-map nil) + (setq nneething-active (cons 1 0)) + (nneething-create-mapping) + (setq nneething-group-alist + (cons (list group dir nneething-map nneething-active) + nneething-group-alist))))))) + +(defun nneething-map-file () + ;; We make sure that the .neething directory exists. + (make-directory nneething-map-file-directory 'parents) + ;; We store it in a special directory under the user's home dir. + (concat (file-name-as-directory nneething-map-file-directory) + nneething-group nneething-map-file)) + +(defun nneething-create-mapping () + ;; Read nneething-active and nneething-map + (let ((map-file (nneething-map-file)) + (files (directory-files nneething-directory)) + touched) + (if (file-exists-p map-file) + (condition-case nil + (load map-file nil t t) + (error nil))) + (or nneething-active (setq nneething-active (cons 1 0))) + ;; Remove files matching that regexp. + (let ((f files) + prev) + (while f + (if (string-match nneething-exclude-files (car f)) + (if prev (setcdr prev (cdr f)) + (setq files (cdr files))) + (setq prev f)) + (setq f (cdr f)))) + ;; Remove files that have disappeared from the map. + (let ((map nneething-map) + prev) + (while map + (if (member (car (car map)) files) + (setq prev map) + (setq touched t) + (if prev + (setcdr prev (cdr map)) + (setq nneething-map (cdr nneething-map)))) + (setq map (cdr map)))) + ;; Find all new files and enter them into the map. + (while files + (or (assoc (car files) nneething-map) ; If already in the map, ignore. + (progn + (setq touched t) + (setcdr nneething-active (1+ (cdr nneething-active))) + (setq nneething-map + (cons (cons (car files) (cdr nneething-active)) nneething-map)))) + (setq files (cdr files))) + (if (or (not touched) nneething-read-only) + () + (save-excursion + (set-buffer (get-buffer-create " *nneething map*")) + (buffer-disable-undo (current-buffer)) + (erase-buffer) + (insert "(setq nneething-map '" (prin1-to-string nneething-map) ")\n" + "(setq nneething-active '" (prin1-to-string nneething-active) + ")\n") + (write-region (point-min) (point-max) map-file nil 'nomesg) + (kill-buffer (current-buffer)))))) + +(defvar nneething-message-id-number 0) +(defvar nneething-work-buffer " *nneething work*") + +(defun nneething-insert-head (file) + (and (nneething-get-head file) + (insert-buffer-substring nneething-work-buffer))) + +(defun nneething-make-head (file) + (let ((atts (file-attributes file))) + (insert "Subject: " (file-name-nondirectory file) "\n" + "Message-ID: <nneething-" + (int-to-string + (setq nneething-message-id-number + (1+ nneething-message-id-number))) + "@" (system-name) ">\n" + "Date: " (current-time-string (nth 5 atts)) "\n" + (nneething-from-line (nth 2 atts)) + "Chars: " (int-to-string (nth 7 atts)) "\n"))) + +(defun nneething-from-line (uid) + (let ((login (condition-case nil + (user-login-name uid) + (error + (cond ((= uid (user-uid)) (user-login-name)) + ((zerop uid) "root") + (t (int-to-string uid)))))) + (name (condition-case nil + (user-full-name uid) + (error + (cond ((= uid (user-uid)) (user-full-name)) + ((zerop uid) "Ms. Root")))))) + (concat "From: " login "@" (system-name) + (if name (concat " (" name ")") "") "\n"))) + +(defun nneething-get-head (file) + (save-excursion + (set-buffer (get-buffer-create nneething-work-buffer)) + (setq case-fold-search nil) + (buffer-disable-undo (current-buffer)) + (erase-buffer) + (cond + ((not (file-exists-p file)) + ;; The file do not exist. + nil) + ((or (file-directory-p file) + (file-symlink-p file)) + ;; It's a dir, so we fudge a head. + (nneething-make-head file) t) + (t + ;; We examine the file. + (nnheader-insert-head file) + (if (nnheader-article-p) + (delete-region + (progn + (goto-char (point-min)) + (or (and (search-forward "\n\n" nil t) + (1- (point))) + (point-max))) + (point-max)) + (erase-buffer) + (nneething-make-head file)) + t)))) + +(defun nneething-number-to-file (number) + (car (rassq number nneething-map))) + +(defun nneething-file-name (article) + (concat (file-name-as-directory nneething-directory) + (if (numberp article) (nneething-number-to-file article) + article))) + +(provide 'nneething) + +;;; nneething.el ends here |