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- ;;; nneething.el --- random file access for Gnus
- ;; Copyright (C) 1995,96 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:
-
- ;; 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)
- (require 'nnoo)
- (eval-when-compile (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-group-alist nil)
-
- (defvoo nneething-message-id-number 0)
- (defvoo nneething-work-buffer " *nneething work*")
-
- (defvoo nneething-directory nil)
- (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.
- (or (nnheader-article-p) ; Either it's a real article...
- (progn
- (goto-char (point-min))
- (nneething-make-head file (current-buffer)) ; ... or we fake some headers.
- (insert "\n")))
- t))))
-
- (deffoo nneething-request-group (group &optional dir dont-check)
- (nneething-possibly-change-directory group dir)
- (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)
-
-
- ;;; Internal functions.
-
- (defun nneething-possibly-change-directory (group &optional dir)
- (when 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)
- (push (list group dir nneething-map nneething-active)
- nneething-group-alist))))))
-
- (defun nneething-map-file ()
- ;; We make sure that the .nneething directory exists.
- (unless (file-exists-p nneething-map-file-directory)
- (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 map-files)
- (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)))
- ;; 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))
- (save-excursion
- (nnheader-set-temp-buffer " *nneething map*")
- (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))))))
-
- (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 (if buffer
- (save-excursion
- (set-buffer buffer)
- (if (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))
- (if (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
-