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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
|
