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Diffstat (limited to 'lisp/gnus/nneething.el')
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diff --git a/lisp/gnus/nneething.el b/lisp/gnus/nneething.el new file mode 100644 index 00000000000..1723cfe0821 --- /dev/null +++ b/lisp/gnus/nneething.el @@ -0,0 +1,350 @@ +;;; nneething.el --- random file access for Gnus +;; Copyright (C) 1995,96,97 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, Inc., 59 Temple Place - Suite 330, +;; Boston, MA 02111-1307, USA. + +;;; Commentary: + +;;; Code: + +(require 'nnheader) +(require 'nnmail) +(require 'nnoo) +(require 'gnus-util) +(require 'cl) + +(nnoo-declare nneething) + +(defvoo nneething-map-file-directory "~/.nneething/" + "Where nneething stores the map files.") + +(defvoo nneething-map-file ".nneething" + "Name of the map files.") + +(defvoo nneething-exclude-files nil + "Regexp saying what files to exclude from the group. +If this variable is nil, no files will be excluded.") + + + +;;; Internal variables. + +(defconst nneething-version "nneething 1.0" + "nneething version.") + +(defvoo nneething-current-directory nil + "Current news group directory.") + +(defvoo nneething-status-string "") + +(defvoo nneething-message-id-number 0) +(defvoo nneething-work-buffer " *nneething work*") + +(defvoo nneething-group nil) +(defvoo nneething-map nil) +(defvoo nneething-read-only nil) +(defvoo nneething-active nil) + + + +;;; Interface functions. + +(nnoo-define-basics nneething) + +(deffoo nneething-retrieve-headers (articles &optional group server fetch-old) + (nneething-possibly-change-directory group) + + (save-excursion + (set-buffer nntp-server-buffer) + (erase-buffer) + (let* ((number (length articles)) + (count 0) + (large (and (numberp nnmail-large-newsgroup) + (> number nnmail-large-newsgroup))) + article file) + + (if (stringp (car articles)) + 'headers + + (while (setq article (pop articles)) + (setq file (nneething-file-name article)) + + (when (and (file-exists-p file) + (or (file-directory-p file) + (not (zerop (nnheader-file-size file))))) + (insert (format "221 %d Article retrieved.\n" article)) + (nneething-insert-head file) + (insert ".\n")) + + (incf count) + + (and large + (zerop (% count 20)) + (message "nneething: Receiving headers... %d%%" + (/ (* count 100) number)))) + + (when large + (message "nneething: Receiving headers...done")) + + (nnheader-fold-continuation-lines) + 'headers)))) + +(deffoo nneething-request-article (id &optional group server buffer) + (nneething-possibly-change-directory group) + (let ((file (unless (stringp id) + (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. + (unless (nnheader-article-p) ; Either it's a real article... + (goto-char (point-min)) + (nneething-make-head file (current-buffer)) ; ... or we fake some headers. + (insert "\n")) + t)))) + +(deffoo nneething-request-group (group &optional server dont-check) + (nneething-possibly-change-directory group server) + (unless dont-check + (nneething-create-mapping) + (if (> (car nneething-active) (cdr nneething-active)) + (nnheader-insert "211 0 1 0 %s\n" group) + (nnheader-insert + "211 %d %d %d %s\n" + (- (1+ (cdr nneething-active)) (car nneething-active)) + (car nneething-active) (cdr nneething-active) + group))) + t) + +(deffoo nneething-request-list (&optional server dir) + (nnheader-report 'nneething "LIST is not implemented.")) + +(deffoo nneething-request-newgroups (date &optional server) + (nnheader-report 'nneething "NEWSGROUPS is not implemented.")) + +(deffoo nneething-request-type (group &optional article) + 'unknown) + +(deffoo nneething-close-group (group &optional server) + (setq nneething-current-directory nil) + t) + +(deffoo nneething-open-server (server &optional defs) + (nnheader-init-server-buffer) + (if (nneething-server-opened server) + t + (unless (assq 'nneething-directory defs) + (setq defs (append defs (list (list 'nneething-directory server))))) + (nnoo-change-server 'nneething server defs))) + + +;;; Internal functions. + +(defun nneething-possibly-change-directory (group &optional server) + (when (and server + (not (nneething-server-opened server))) + (nneething-open-server server)) + (when (and group + (not (equal nneething-group group))) + (setq nneething-group group) + (setq nneething-map nil) + (setq nneething-active (cons 1 0)) + (nneething-create-mapping))) + +(defun nneething-map-file () + ;; We make sure that the .nneething directory exists. + (gnus-make-directory nneething-map-file-directory) + ;; 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. + (when (file-exists-p nneething-directory) + (let ((map-file (nneething-map-file)) + (files (directory-files nneething-directory)) + touched map-files) + (when (file-exists-p map-file) + (ignore-errors + (load map-file nil t t))) + (unless nneething-active + (setq nneething-active (cons 1 0))) + ;; Old nneething had a different map format. + (when (and (cdar nneething-map) + (atom (cdar nneething-map))) + (setq nneething-map + (mapcar (lambda (n) + (list (cdr n) (car n) + (nth 5 (file-attributes + (nneething-file-name (car n)))))) + nneething-map))) + ;; Remove files matching the exclusion regexp. + (when nneething-exclude-files + (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 deleted files from the map. + (let ((map nneething-map) + prev) + (while map + (if (and (member (cadar map) files) + ;; We also remove files that have changed mod times. + (equal (nth 5 (file-attributes + (nneething-file-name (cadar map)))) + (caddar map))) + (progn + (push (cadar map) 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 + (unless (member (car files) map-files) + ;; This file is not in the map, so we enter it. + (setq touched t) + (setcdr nneething-active (1+ (cdr nneething-active))) + (push (list (cdr nneething-active) (car files) + (nth 5 (file-attributes + (nneething-file-name (car files))))) + nneething-map)) + (setq files (cdr files))) + (when (and touched + (not nneething-read-only)) + (nnheader-temp-write map-file + (insert "(setq nneething-map '") + (gnus-prin1 nneething-map) + (insert ")\n(setq nneething-active '") + (gnus-prin1 nneething-active) + (insert ")\n")))))) + +(defun nneething-insert-head (file) + "Insert the head of FILE." + (when (nneething-get-head file) + (insert-buffer-substring nneething-work-buffer) + (goto-char (point-max)))) + +(defun nneething-make-head (file &optional buffer) + "Create a head by looking at the file attributes of FILE." + (let ((atts (file-attributes file))) + (insert + "Subject: " (file-name-nondirectory file) "\n" + "Message-ID: <nneething-" + (int-to-string (incf nneething-message-id-number)) + "@" (system-name) ">\n" + (if (equal '(0 0) (nth 5 atts)) "" + (concat "Date: " (current-time-string (nth 5 atts)) "\n")) + (or (when buffer + (save-excursion + (set-buffer buffer) + (when (re-search-forward "<[a-zA-Z0-9_]@[-a-zA-Z0-9_]>" 1000 t) + (concat "From: " (match-string 0) "\n")))) + (nneething-from-line (nth 2 atts) file)) + (if (> (string-to-int (int-to-string (nth 7 atts))) 0) + (concat "Chars: " (int-to-string (nth 7 atts)) "\n") + "") + (if buffer + (save-excursion + (set-buffer buffer) + (concat "Lines: " (int-to-string + (count-lines (point-min) (point-max))) + "\n")) + "") + ))) + +(defun nneething-from-line (uid &optional file) + "Return a From header based of 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"))))) + (host (if (string-match "\\`/[^/@]*@\\([^:/]+\\):" file) + (prog1 + (substring file + (match-beginning 1) + (match-end 1)) + (when (string-match "/\\(users\\|home\\)/\\([^/]+\\)/" file) + (setq login (substring file + (match-beginning 2) + (match-end 2)) + name nil))) + (system-name)))) + (concat "From: " login "@" host + (if name (concat " (" name ")") "") "\n"))) + +(defun nneething-get-head (file) + "Either find the head in FILE or make a head for 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)) + (goto-char (point-min)) + (nneething-make-head file (current-buffer)) + (delete-region (point) (point-max))) + t)))) + +(defun nneething-file-name (article) + "Return the file name of ARTICLE." + (concat (file-name-as-directory nneething-directory) + (if (numberp article) + (cadr (assq article nneething-map)) + article))) + +(provide 'nneething) + +;;; nneething.el ends here |