lisp/gnus/nnsoup.el

   1 ;;; nnsoup.el --- SOUP access for Gnus
   2
   3 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000
   4 ;;      Free Software Foundation, Inc.
   5
   6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   7 ;;      Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
   8 ;; Keywords: news, mail
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 2, or (at your option)
  15 ;; any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25 ;; Boston, MA 02111-1307, USA.
  26
  27 ;;; Commentary:
  28
  29 ;;; Code:
  30
  31 (require 'nnheader)
  32 (require 'nnmail)
  33 (require 'gnus-soup)
  34 (require 'gnus-msg)
  35 (require 'nnoo)
  36 (eval-when-compile (require 'cl))
  37
  38 (nnoo-declare nnsoup)
  39
  40 (defvoo nnsoup-directory "~/SOUP/"
  41   "*SOUP packet directory.")
  42
  43 (defvoo nnsoup-tmp-directory
  44     (cond ((fboundp 'temp-directory) (temp-directory))
  45           ((boundp 'temporary-file-directory) temporary-file-directory)
  46           ("/tmp/"))
  47   "*Where nnsoup will store temporary files.")
  48
  49 (defvoo nnsoup-replies-directory (expand-file-name "replies/" nnsoup-directory)
  50   "*Directory where outgoing packets will be composed.")
  51
  52 (defvoo nnsoup-replies-format-type ?u  ;; u is USENET news format.
  53   "*Format of the replies packages.")
  54
  55 (defvoo nnsoup-replies-index-type ?n
  56   "*Index type of the replies packages.")
  57
  58 (defvoo nnsoup-active-file (expand-file-name "active" nnsoup-directory)
  59   "Active file.")
  60
  61 (defvoo nnsoup-packer "tar cf - %s | gzip > $HOME/Soupin%d.tgz"
  62   "Format string command for packing a SOUP packet.
  63 The SOUP files will be inserted where the %s is in the string.
  64 This string MUST contain both %s and %d.  The file number will be
  65 inserted where %d appears.")
  66
  67 (defvoo nnsoup-unpacker "gunzip -c %s | tar xvf -"
  68   "*Format string command for unpacking a SOUP packet.
  69 The SOUP packet file name will be inserted at the %s.")
  70
  71 (defvoo nnsoup-packet-directory "~/"
  72   "*Where nnsoup will look for incoming packets.")
  73
  74 (defvoo nnsoup-packet-regexp "Soupout"
  75   "*Regular expression matching SOUP packets in `nnsoup-packet-directory'.")
  76
  77 (defvoo nnsoup-always-save t
  78   "If non nil commit the reply buffer on each message send.
  79 This is necessary if using message mode outside Gnus with nnsoup as a
  80 backend for the messages.")
  81
  82 \f
  83
  84 (defconst nnsoup-version "nnsoup 0.0"
  85   "nnsoup version.")
  86
  87 (defvoo nnsoup-status-string "")
  88 (defvoo nnsoup-group-alist nil)
  89 (defvoo nnsoup-current-prefix 0)
  90 (defvoo nnsoup-replies-list nil)
  91 (defvoo nnsoup-buffers nil)
  92 (defvoo nnsoup-current-group nil)
  93 (defvoo nnsoup-group-alist-touched nil)
  94 (defvoo nnsoup-article-alist nil)
  95 \f
  96
  97 ;;; Interface functions.
  98
  99 (nnoo-define-basics nnsoup)
 100
 101 (deffoo nnsoup-retrieve-headers (sequence &optional group server fetch-old)
 102   (nnsoup-possibly-change-group group)
 103   (save-excursion
 104     (set-buffer nntp-server-buffer)
 105     (erase-buffer)
 106     (let ((areas (cddr (assoc nnsoup-current-group nnsoup-group-alist)))
 107           (articles sequence)
 108           (use-nov t)
 109           useful-areas this-area-seq msg-buf)
 110       (if (stringp (car sequence))
 111           ;; We don't support fetching by Message-ID.
 112           'headers
 113         ;; We go through all the areas and find which files the
 114         ;; articles in SEQUENCE come from.
 115         (while (and areas sequence)
 116           ;; Peel off areas that are below sequence.
 117           (while (and areas (< (cdaar areas) (car sequence)))
 118             (setq areas (cdr areas)))
 119           (when areas
 120             ;; This is a useful area.
 121             (push (car areas) useful-areas)
 122             (setq this-area-seq nil)
 123             ;; We take note whether this MSG has a corresponding IDX
 124             ;; for later use.
 125             (when (or (= (gnus-soup-encoding-index
 126                           (gnus-soup-area-encoding (nth 1 (car areas)))) ?n)
 127                       (not (file-exists-p
 128                             (nnsoup-file
 129                              (gnus-soup-area-prefix (nth 1 (car areas)))))))
 130               (setq use-nov nil))
 131             ;; We assign the portion of `sequence' that is relevant to
 132             ;; this MSG packet to this packet.
 133             (while (and sequence (<= (car sequence) (cdaar areas)))
 134               (push (car sequence) this-area-seq)
 135               (setq sequence (cdr sequence)))
 136             (setcar useful-areas (cons (nreverse this-area-seq)
 137                                        (car useful-areas)))))
 138
 139         ;; We now have a list of article numbers and corresponding
 140         ;; areas.
 141         (setq useful-areas (nreverse useful-areas))
 142
 143         ;; Two different approaches depending on whether all the MSG
 144         ;; files have corresponding IDX files.  If they all do, we
 145         ;; simply return the relevant IDX files and let Gnus sort out
 146         ;; what lines are relevant.  If some of the IDX files are
 147         ;; missing, we must return HEADs for all the articles.
 148         (if use-nov
 149             ;; We have IDX files for all areas.
 150             (progn
 151               (while useful-areas
 152                 (goto-char (point-max))
 153                 (let ((b (point))
 154                       (number (car (nth 1 (car useful-areas))))
 155                       (index-buffer (nnsoup-index-buffer
 156                                      (gnus-soup-area-prefix
 157                                       (nth 2 (car useful-areas))))))
 158                   (when index-buffer
 159                     (insert-buffer-substring index-buffer)
 160                     (goto-char b)
 161                     ;; We have to remove the index number entires and
 162                     ;; insert article numbers instead.
 163                     (while (looking-at "[0-9]+")
 164                       (replace-match (int-to-string number) t t)
 165                       (incf number)
 166                       (forward-line 1))))
 167                 (setq useful-areas (cdr useful-areas)))
 168               'nov)
 169           ;; We insert HEADs.
 170           (while useful-areas
 171             (setq articles (caar useful-areas)
 172                   useful-areas (cdr useful-areas))
 173             (while articles
 174               (when (setq msg-buf
 175                           (nnsoup-narrow-to-article
 176                            (car articles) (cdar useful-areas) 'head))
 177                 (goto-char (point-max))
 178                 (insert (format "221 %d Article retrieved.\n" (car articles)))
 179                 (insert-buffer-substring msg-buf)
 180                 (goto-char (point-max))
 181                 (insert ".\n"))
 182               (setq articles (cdr articles))))
 183
 184           (nnheader-fold-continuation-lines)
 185           'headers)))))
 186
 187 (deffoo nnsoup-open-server (server &optional defs)
 188   (nnoo-change-server 'nnsoup server defs)
 189   (when (not (file-exists-p nnsoup-directory))
 190     (condition-case ()
 191         (make-directory nnsoup-directory t)
 192       (error t)))
 193   (cond
 194    ((not (file-exists-p nnsoup-directory))
 195     (nnsoup-close-server)
 196     (nnheader-report 'nnsoup "Couldn't create directory: %s" nnsoup-directory))
 197    ((not (file-directory-p (file-truename nnsoup-directory)))
 198     (nnsoup-close-server)
 199     (nnheader-report 'nnsoup "Not a directory: %s" nnsoup-directory))
 200    (t
 201     (nnsoup-read-active-file)
 202     (nnheader-report 'nnsoup "Opened server %s using directory %s"
 203                      server nnsoup-directory)
 204     t)))
 205
 206 (deffoo nnsoup-request-close ()
 207   (nnsoup-write-active-file)
 208   (nnsoup-write-replies)
 209   (gnus-soup-save-areas)
 210   ;; Kill all nnsoup buffers.
 211   (let (buffer)
 212     (while nnsoup-buffers
 213       (setq buffer (cdr (pop nnsoup-buffers)))
 214       (and buffer
 215            (buffer-name buffer)
 216            (kill-buffer buffer))))
 217   (setq nnsoup-group-alist nil
 218         nnsoup-group-alist-touched nil
 219         nnsoup-current-group nil
 220         nnsoup-replies-list nil)
 221   (nnoo-close-server 'nnoo)
 222   t)
 223
 224 (deffoo nnsoup-request-article (id &optional newsgroup server buffer)
 225   (nnsoup-possibly-change-group newsgroup)
 226   (let (buf)
 227     (save-excursion
 228       (set-buffer (or buffer nntp-server-buffer))
 229       (erase-buffer)
 230       (when (and (not (stringp id))
 231                  (setq buf (nnsoup-narrow-to-article id)))
 232         (insert-buffer-substring buf)
 233         t))))
 234
 235 (deffoo nnsoup-request-group (group &optional server dont-check)
 236   (nnsoup-possibly-change-group group)
 237   (if dont-check
 238       t
 239     (let ((active (cadr (assoc group nnsoup-group-alist))))
 240       (if (not active)
 241           (nnheader-report 'nnsoup "No such group: %s" group)
 242         (nnheader-insert
 243          "211 %d %d %d %s\n"
 244          (max (1+ (- (cdr active) (car active))) 0)
 245          (car active) (cdr active) group)))))
 246
 247 (deffoo nnsoup-request-type (group &optional article)
 248   (nnsoup-possibly-change-group group)
 249   ;; Try to guess the type based on the first article in the group.
 250   (when (not article)
 251     (setq article
 252           (cdaar (cddr (assoc group nnsoup-group-alist)))))
 253   (if (not article)
 254       'unknown
 255     (let ((kind (gnus-soup-encoding-kind
 256                  (gnus-soup-area-encoding
 257                   (nth 1 (nnsoup-article-to-area
 258                           article nnsoup-current-group))))))
 259       (cond ((= kind ?m) 'mail)
 260             ((= kind ?n) 'news)
 261             (t 'unknown)))))
 262
 263 (deffoo nnsoup-close-group (group &optional server)
 264   ;; Kill all nnsoup buffers.
 265   (let ((buffers nnsoup-buffers)
 266         elem)
 267     (while buffers
 268       (when (equal (car (setq elem (pop buffers))) group)
 269         (setq nnsoup-buffers (delq elem nnsoup-buffers))
 270         (and (cdr elem) (buffer-name (cdr elem))
 271              (kill-buffer (cdr elem))))))
 272   t)
 273
 274 (deffoo nnsoup-request-list (&optional server)
 275   (save-excursion
 276     (set-buffer nntp-server-buffer)
 277     (erase-buffer)
 278     (unless nnsoup-group-alist
 279       (nnsoup-read-active-file))
 280     (let ((alist nnsoup-group-alist)
 281           (standard-output (current-buffer))
 282           entry)
 283       (while (setq entry (pop alist))
 284         (insert (car entry) " ")
 285         (princ (cdadr entry))
 286         (insert " ")
 287         (princ (caadr entry))
 288         (insert " y\n"))
 289       t)))
 290
 291 (deffoo nnsoup-request-scan (group &optional server)
 292   (nnsoup-unpack-packets))
 293
 294 (deffoo nnsoup-request-newgroups (date &optional server)
 295   (nnsoup-request-list))
 296
 297 (deffoo nnsoup-request-list-newsgroups (&optional server)
 298   nil)
 299
 300 (deffoo nnsoup-request-post (&optional server)
 301   (nnsoup-store-reply "news")
 302   t)
 303
 304 (deffoo nnsoup-request-mail (&optional server)
 305   (nnsoup-store-reply "mail")
 306   t)
 307
 308 (deffoo nnsoup-request-expire-articles (articles group &optional server force)
 309   (nnsoup-possibly-change-group group)
 310   (let* ((total-infolist (assoc group nnsoup-group-alist))
 311          (active (cadr total-infolist))
 312          (infolist (cddr total-infolist))
 313          info range-list mod-time prefix)
 314     (while infolist
 315       (setq info (pop infolist)
 316             range-list (gnus-uncompress-range (car info))
 317             prefix (gnus-soup-area-prefix (nth 1 info)))
 318       (when;; All the articles in this file are marked for expiry.
 319           (and (or (setq mod-time (nth 5 (file-attributes
 320                                           (nnsoup-file prefix))))
 321                    (setq mod-time (nth 5 (file-attributes
 322                                           (nnsoup-file prefix t)))))
 323                (gnus-sublist-p articles range-list)
 324                ;; This file is old enough.
 325                (nnmail-expired-article-p group mod-time force))
 326         ;; Ok, we delete this file.
 327         (when (ignore-errors
 328                 (nnheader-message
 329                  5 "Deleting %s in group %s..." (nnsoup-file prefix)
 330                  group)
 331                 (when (file-exists-p (nnsoup-file prefix))
 332                   (delete-file (nnsoup-file prefix)))
 333                 (nnheader-message
 334                  5 "Deleting %s in group %s..." (nnsoup-file prefix t)
 335                  group)
 336                 (when (file-exists-p (nnsoup-file prefix t))
 337                   (delete-file (nnsoup-file prefix t)))
 338                 t)
 339           (setcdr (cdr total-infolist) (delq info (cddr total-infolist)))
 340           (setq articles (gnus-sorted-complement articles range-list))))
 341       (when (not mod-time)
 342         (setcdr (cdr total-infolist) (delq info (cddr total-infolist)))))
 343     (if (cddr total-infolist)
 344         (setcar active (caaadr (cdr total-infolist)))
 345       (setcar active (1+ (cdr active))))
 346     (nnsoup-write-active-file t)
 347     ;; Return the articles that weren't expired.
 348     articles))
 349
 350 \f
 351 ;;; Internal functions
 352
 353 (defun nnsoup-possibly-change-group (group &optional force)
 354   (when (and group
 355              (not (equal nnsoup-current-group group)))
 356     (setq nnsoup-article-alist nil)
 357     (setq nnsoup-current-group group))
 358   t)
 359
 360 (defun nnsoup-read-active-file ()
 361   (setq nnsoup-group-alist nil)
 362   (when (file-exists-p nnsoup-active-file)
 363     (ignore-errors
 364       (load nnsoup-active-file t t t))
 365     ;; Be backwards compatible.
 366     (when (and nnsoup-group-alist
 367                (not (atom (caadar nnsoup-group-alist))))
 368       (let ((alist nnsoup-group-alist)
 369             entry e min max)
 370         (while (setq e (cdr (setq entry (pop alist))))
 371           (setq min (caaar e))
 372           (while (cdr e)
 373             (setq e (cdr e)))
 374           (setq max (cdaar e))
 375           (setcdr entry (cons (cons min max) (cdr entry)))))
 376       (setq nnsoup-group-alist-touched t))
 377     nnsoup-group-alist))
 378
 379 (defun nnsoup-write-active-file (&optional force)
 380   (when (and nnsoup-group-alist
 381              (or force
 382                  nnsoup-group-alist-touched))
 383     (setq nnsoup-group-alist-touched nil)
 384     (with-temp-file nnsoup-active-file
 385       (gnus-prin1 `(setq nnsoup-group-alist ',nnsoup-group-alist))
 386       (insert "\n")
 387       (gnus-prin1 `(setq nnsoup-current-prefix ,nnsoup-current-prefix))
 388       (insert "\n"))))
 389
 390 (defun nnsoup-next-prefix ()
 391   "Return the next free prefix."
 392   (let (prefix)
 393     (while (or (file-exists-p
 394                 (nnsoup-file (setq prefix (int-to-string
 395                                            nnsoup-current-prefix))))
 396                (file-exists-p (nnsoup-file prefix t)))
 397       (incf nnsoup-current-prefix))
 398     (incf nnsoup-current-prefix)
 399     prefix))
 400
 401 (defun nnsoup-file-name (dir file)
 402   "Return the full path of FILE (in any case) in DIR."
 403   (let* ((case-fold-search t)
 404          (files (directory-files dir t))
 405          (regexp (concat (regexp-quote file) "$")))
 406     (car (delq nil
 407                (mapcar
 408                 (lambda (file)
 409                   (if (string-match regexp file)
 410                       file
 411                     nil))
 412                 files)))))
 413
 414 (defun nnsoup-read-areas ()
 415   (let ((areas-file (nnsoup-file-name nnsoup-tmp-directory "areas")))
 416     (when areas-file
 417       (save-excursion
 418         (set-buffer nntp-server-buffer)
 419         (let ((areas (gnus-soup-parse-areas areas-file))
 420               entry number area lnum cur-prefix file)
 421           ;; Go through all areas in the new AREAS file.
 422           (while (setq area (pop areas))
 423             ;; Change the name to the permanent name and move the files.
 424             (setq cur-prefix (nnsoup-next-prefix))
 425             (nnheader-message 5 "Incorporating file %s..." cur-prefix)
 426             (when (file-exists-p
 427                    (setq file
 428                          (expand-file-name
 429                           (concat (gnus-soup-area-prefix area) ".IDX")
 430                           nnsoup-tmp-directory)))
 431               (rename-file file (nnsoup-file cur-prefix)))
 432             (when (file-exists-p
 433                    (setq file (expand-file-name
 434                                (concat (gnus-soup-area-prefix area) ".MSG")
 435                                nnsoup-tmp-directory)))
 436               (rename-file file (nnsoup-file cur-prefix t))
 437               (gnus-soup-set-area-prefix area cur-prefix)
 438               ;; Find the number of new articles in this area.
 439               (setq number (nnsoup-number-of-articles area))
 440               (if (not (setq entry (assoc (gnus-soup-area-name area)
 441                                           nnsoup-group-alist)))
 442                   ;; If this is a new area (group), we just add this info to
 443                   ;; the group alist.
 444                   (push (list (gnus-soup-area-name area)
 445                               (cons 1 number)
 446                               (list (cons 1 number) area))
 447                         nnsoup-group-alist)
 448                 ;; There are already articles in this group, so we add this
 449                 ;; info to the end of the entry.
 450                 (nconc entry (list (list (cons (1+ (setq lnum (cdadr entry)))
 451                                                (+ lnum number))
 452                                          area)))
 453                 (setcdr (cadr entry) (+ lnum number))))))
 454         (nnsoup-write-active-file t)
 455         (delete-file areas-file)))))
 456
 457 (defun nnsoup-number-of-articles (area)
 458   (save-excursion
 459     (cond
 460      ;; If the number is in the area info, we just return it.
 461      ((gnus-soup-area-number area)
 462       (gnus-soup-area-number area))
 463      ;; If there is an index file, we just count the lines.
 464      ((/= (gnus-soup-encoding-index (gnus-soup-area-encoding area)) ?n)
 465       (set-buffer (nnsoup-index-buffer (gnus-soup-area-prefix area)))
 466       (count-lines (point-min) (point-max)))
 467      ;; We do it the hard way - re-searching through the message
 468      ;; buffer.
 469      (t
 470       (set-buffer (nnsoup-message-buffer (gnus-soup-area-prefix area)))
 471       (unless (assoc (gnus-soup-area-prefix area) nnsoup-article-alist)
 472         (nnsoup-dissect-buffer area))
 473       (length (cdr (assoc (gnus-soup-area-prefix area)
 474                           nnsoup-article-alist)))))))
 475
 476 (defun nnsoup-dissect-buffer (area)
 477   (let ((mbox-delim (concat "^" message-unix-mail-delimiter))
 478         (format (gnus-soup-encoding-format (gnus-soup-area-encoding area)))
 479         (i 0)
 480         alist len)
 481     (goto-char (point-min))
 482     (cond
 483      ;; rnews batch format
 484      ((or (= format ?u)
 485           (= format ?n)) ;; Gnus back compatibility.
 486       (while (looking-at "^#! *rnews \\(+[0-9]+\\) *$")
 487         (forward-line 1)
 488         (push (list
 489                (incf i) (point)
 490                (progn
 491                  (forward-char (string-to-number (match-string 1)))
 492                  (point)))
 493               alist)))
 494      ;; Unix mbox format
 495      ((= format ?m)
 496       (while (looking-at mbox-delim)
 497         (forward-line 1)
 498         (push (list
 499                (incf i) (point)
 500                (progn
 501                  (if (re-search-forward mbox-delim nil t)
 502                      (beginning-of-line)
 503                    (goto-char (point-max)))
 504                  (point)))
 505               alist)))
 506      ;; MMDF format
 507      ((= format ?M)
 508       (while (looking-at "\^A\^A\^A\^A\n")
 509         (forward-line 1)
 510         (push (list
 511                (incf i) (point)
 512                (progn
 513                  (if (search-forward "\n\^A\^A\^A\^A\n" nil t)
 514                      (beginning-of-line)
 515                    (goto-char (point-max)))
 516                  (point)))
 517               alist)))
 518      ;; Binary format
 519      ((or (= format ?B) (= format ?b))
 520       (while (not (eobp))
 521         (setq len (+ (* (char-after (point)) (expt 2.0 24))
 522                      (* (char-after (+ (point) 1)) (expt 2 16))
 523                      (* (char-after (+ (point) 2)) (expt 2 8))
 524                      (char-after (+ (point) 3))))
 525         (push (list
 526                (incf i) (+ (point) 4)
 527                (progn
 528                  (forward-char (floor (+ len 4)))
 529                  (point)))
 530               alist)))
 531      (t
 532       (error "Unknown format: %c" format)))
 533     (push (cons (gnus-soup-area-prefix area) alist) nnsoup-article-alist)))
 534
 535 (defun nnsoup-index-buffer (prefix &optional message)
 536   (let* ((file (concat prefix (if message ".MSG" ".IDX")))
 537          (buffer-name (concat " *nnsoup " file "*")))
 538     (or (get-buffer buffer-name)        ; File already loaded.
 539         (when (file-exists-p (expand-file-name file nnsoup-directory))
 540           (save-excursion               ; Load the file.
 541             (set-buffer (get-buffer-create buffer-name))
 542             (buffer-disable-undo)
 543             (push (cons nnsoup-current-group (current-buffer)) nnsoup-buffers)
 544             (nnheader-insert-file-contents
 545              (expand-file-name file nnsoup-directory))
 546             (current-buffer))))))
 547
 548 (defun nnsoup-file (prefix &optional message)
 549   (expand-file-name
 550    (concat prefix (if message ".MSG" ".IDX"))
 551    nnsoup-directory))
 552
 553 (defun nnsoup-message-buffer (prefix)
 554   (nnsoup-index-buffer prefix 'msg))
 555
 556 (defun nnsoup-unpack-packets ()
 557   "Unpack all packets in `nnsoup-packet-directory'."
 558   (let ((packets (directory-files
 559                   nnsoup-packet-directory t nnsoup-packet-regexp))
 560         packet)
 561     (while (setq packet (pop packets))
 562       (nnheader-message 5 "nnsoup: unpacking %s..." packet)
 563       (if (not (gnus-soup-unpack-packet
 564                 nnsoup-tmp-directory nnsoup-unpacker packet))
 565           (nnheader-message 5 "Couldn't unpack %s" packet)
 566         (delete-file packet)
 567         (nnsoup-read-areas)
 568         (nnheader-message 5 "Unpacking...done")))))
 569
 570 (defun nnsoup-narrow-to-article (article &optional area head)
 571   (let* ((area (or area (nnsoup-article-to-area article nnsoup-current-group)))
 572          (prefix (and area (gnus-soup-area-prefix (nth 1 area))))
 573          (msg-buf (and prefix (nnsoup-index-buffer prefix 'msg)))
 574          beg end)
 575     (when area
 576       (save-excursion
 577         (cond
 578          ;; There is no MSG file.
 579          ((null msg-buf)
 580           nil)
 581          ;; We use the index file to find out where the article
 582          ;; begins and ends.
 583          ((and (= (gnus-soup-encoding-index
 584                    (gnus-soup-area-encoding (nth 1 area)))
 585                   ?c)
 586                (file-exists-p (nnsoup-file prefix)))
 587           (set-buffer (nnsoup-index-buffer prefix))
 588           (widen)
 589           (goto-char (point-min))
 590           (forward-line (- article (caar area)))
 591           (setq beg (read (current-buffer)))
 592           (forward-line 1)
 593           (if (looking-at "[0-9]+")
 594               (progn
 595                 (setq end (read (current-buffer)))
 596                 (set-buffer msg-buf)
 597                 (widen)
 598                 (let ((format (gnus-soup-encoding-format
 599                                (gnus-soup-area-encoding (nth 1 area)))))
 600                   (goto-char end)
 601                   (when (or (= format ?u) (= format ?n) (= format ?m))
 602                     (setq end (progn (forward-line -1) (point))))))
 603             (set-buffer msg-buf))
 604           (widen)
 605           (narrow-to-region beg (or end (point-max))))
 606          (t
 607           (set-buffer msg-buf)
 608           (widen)
 609           (unless (assoc (gnus-soup-area-prefix (nth 1 area))
 610                          nnsoup-article-alist)
 611             (nnsoup-dissect-buffer (nth 1 area)))
 612           (let ((entry (assq article (cdr (assoc (gnus-soup-area-prefix
 613                                                   (nth 1 area))
 614                                                  nnsoup-article-alist)))))
 615             (when entry
 616               (narrow-to-region (cadr entry) (caddr entry))))))
 617         (goto-char (point-min))
 618         (if (not head)
 619             ()
 620           (narrow-to-region
 621            (point-min)
 622            (if (search-forward "\n\n" nil t)
 623                (1- (point))
 624              (point-max))))
 625         msg-buf))))
 626
 627 ;;;###autoload
 628 (defun nnsoup-pack-replies ()
 629   "Make an outbound package of SOUP replies."
 630   (interactive)
 631   (unless (file-exists-p nnsoup-replies-directory)
 632     (nnheader-message 5 "No such directory: %s" nnsoup-replies-directory))
 633   ;; Write all data buffers.
 634   (gnus-soup-save-areas)
 635   ;; Write the active file.
 636   (nnsoup-write-active-file)
 637   ;; Write the REPLIES file.
 638   (nnsoup-write-replies)
 639   ;; Check whether there is anything here.
 640   (when (null (directory-files nnsoup-replies-directory nil "\\.MSG$"))
 641     (error "No files to pack"))
 642   ;; Pack all these files into a SOUP packet.
 643   (gnus-soup-pack nnsoup-replies-directory nnsoup-packer))
 644
 645 (defun nnsoup-write-replies ()
 646   "Write the REPLIES file."
 647   (when nnsoup-replies-list
 648     (gnus-soup-write-replies nnsoup-replies-directory nnsoup-replies-list)
 649     (setq nnsoup-replies-list nil)))
 650
 651 (defun nnsoup-article-to-area (article group)
 652   "Return the area that ARTICLE in GROUP is located in."
 653   (let ((areas (cddr (assoc group nnsoup-group-alist))))
 654     (while (and areas (< (cdaar areas) article))
 655       (setq areas (cdr areas)))
 656     (and areas (car areas))))
 657
 658 (defvar nnsoup-old-functions
 659   (list message-send-mail-function message-send-news-function))
 660
 661 ;;;###autoload
 662 (defun nnsoup-set-variables ()
 663   "Use the SOUP methods for posting news and mailing mail."
 664   (interactive)
 665   (setq message-send-news-function 'nnsoup-request-post)
 666   (setq message-send-mail-function 'nnsoup-request-mail))
 667
 668 ;;;###autoload
 669 (defun nnsoup-revert-variables ()
 670   "Revert posting and mailing methods to the standard Emacs methods."
 671   (interactive)
 672   (setq message-send-mail-function (car nnsoup-old-functions))
 673   (setq message-send-news-function (cadr nnsoup-old-functions)))
 674
 675 (defun nnsoup-store-reply (kind)
 676   ;; Mostly stolen from `message.el'.
 677   (require 'mail-utils)
 678   (let ((tembuf (generate-new-buffer " message temp"))
 679         (case-fold-search nil)
 680         delimline
 681         (mailbuf (current-buffer)))
 682     (unwind-protect
 683         (save-excursion
 684           (save-restriction
 685             (message-narrow-to-headers)
 686             (if (equal kind "mail")
 687                 (message-generate-headers message-required-mail-headers)
 688               (message-generate-headers message-required-news-headers)))
 689           (set-buffer tembuf)
 690           (erase-buffer)
 691           (insert-buffer-substring mailbuf)
 692           ;; Remove some headers.
 693           (save-restriction
 694             (message-narrow-to-headers)
 695             ;; Remove some headers.
 696             (message-remove-header message-ignored-mail-headers t))
 697           (goto-char (point-max))
 698           ;; require one newline at the end.
 699           (or (= (preceding-char) ?\n)
 700               (insert ?\n))
 701           (let ((case-fold-search t))
 702             ;; Change header-delimiter to be what sendmail expects.
 703             (goto-char (point-min))
 704             (re-search-forward
 705              (concat "^" (regexp-quote mail-header-separator) "\n"))
 706             (replace-match "\n")
 707             (backward-char 1)
 708             (setq delimline (point-marker))
 709             (goto-char (1+ delimline))
 710             (let ((msg-buf
 711                    (gnus-soup-store
 712                     nnsoup-replies-directory
 713                     (nnsoup-kind-to-prefix kind) nil nnsoup-replies-format-type
 714                     nnsoup-replies-index-type))
 715                   (num 0))
 716               (when (and msg-buf (bufferp msg-buf))
 717                 (save-excursion
 718                   (set-buffer msg-buf)
 719                   (goto-char (point-min))
 720                   (while (re-search-forward "^#! *rnews" nil t)
 721                     (incf num))
 722                   (when nnsoup-always-save
 723                     (save-buffer)))
 724                 (nnheader-message 5 "Stored %d messages" num)))
 725             (nnsoup-write-replies)
 726             (kill-buffer tembuf))))))
 727
 728 (defun nnsoup-kind-to-prefix (kind)
 729   (unless nnsoup-replies-list
 730     (setq nnsoup-replies-list
 731           (gnus-soup-parse-replies
 732            (expand-file-name "REPLIES" nnsoup-replies-directory))))
 733   (let ((replies nnsoup-replies-list))
 734     (while (and replies
 735                 (not (string= kind (gnus-soup-reply-kind (car replies)))))
 736       (setq replies (cdr replies)))
 737     (if replies
 738         (gnus-soup-reply-prefix (car replies))
 739       (push (vector (gnus-soup-unique-prefix nnsoup-replies-directory)
 740                     kind
 741                     (format "%c%c%c"
 742                             nnsoup-replies-format-type
 743                             nnsoup-replies-index-type
 744                             (if (string= kind "news")
 745                                 ?n ?m)))
 746             nnsoup-replies-list)
 747       (gnus-soup-reply-prefix (car nnsoup-replies-list)))))
 748
 749 (defun nnsoup-make-active ()
 750   "(Re-)create the SOUP active file."
 751   (interactive)
 752   (let ((files (sort (directory-files nnsoup-directory t "IDX$")
 753                      (lambda (f1 f2)
 754                        (< (progn (string-match "/\\([0-9]+\\)\\." f1)
 755                                  (string-to-int (match-string 1 f1)))
 756                           (progn (string-match "/\\([0-9]+\\)\\." f2)
 757                                  (string-to-int (match-string 1 f2)))))))
 758         active group lines ident elem min)
 759     (set-buffer (get-buffer-create " *nnsoup work*"))
 760     (while files
 761       (nnheader-message 5 "Doing %s..." (car files))
 762       (erase-buffer)
 763       (nnheader-insert-file-contents (car files))
 764       (goto-char (point-min))
 765       (if (not (re-search-forward "^[^\t]*\t[^\t]*\t[^\t]*\t[^\t]*\t[^\t]*\t[^\t]*\t[^\t]*\t[^\t]*\t *\\(Xref: \\)? *[^ ]* \\([^ ]+\\):[0-9]" nil t))
 766           (setq group "unknown")
 767         (setq group (match-string 2)))
 768       (setq lines (count-lines (point-min) (point-max)))
 769       (setq ident (progn (string-match
 770                           "/\\([0-9]+\\)\\." (car files))
 771                          (substring
 772                           (car files) (match-beginning 1)
 773                           (match-end 1))))
 774       (if (not (setq elem (assoc group active)))
 775           (push (list group (cons 1 lines)
 776                       (list (cons 1 lines)
 777                             (vector ident group "ucm" "" lines)))
 778                 active)
 779         (nconc elem
 780                (list
 781                 (list (cons (1+ (setq min (cdadr elem)))
 782                             (+ min lines))
 783                       (vector ident group "ucm" "" lines))))
 784         (setcdr (cadr elem) (+ min lines)))
 785       (setq files (cdr files)))
 786     (nnheader-message 5 "")
 787     (setq nnsoup-group-alist active)
 788     (nnsoup-write-active-file t)))
 789
 790 (defun nnsoup-delete-unreferenced-message-files ()
 791   "Delete any *.MSG and *.IDX files that aren't known by nnsoup."
 792   (interactive)
 793   (let* ((known (apply 'nconc (mapcar
 794                                (lambda (ga)
 795                                  (mapcar
 796                                   (lambda (area)
 797                                     (gnus-soup-area-prefix (cadr area)))
 798                                   (cddr ga)))
 799                                nnsoup-group-alist)))
 800          (regexp "\\.MSG$\\|\\.IDX$")
 801          (files (directory-files nnsoup-directory nil regexp))
 802          non-files file)
 803     ;; Find all files that aren't known by nnsoup.
 804     (while (setq file (pop files))
 805       (string-match regexp file)
 806       (unless (member (substring file 0 (match-beginning 0)) known)
 807         (push file non-files)))
 808     ;; Sort and delete the files.
 809     (setq non-files (sort non-files 'string<))
 810     (map-y-or-n-p "Delete file %s? "
 811                   (lambda (file) (delete-file
 812                                   (expand-file-name file nnsoup-directory)))
 813                   non-files)))
 814
 815 (provide 'nnsoup)
 816
 817 ;;; nnsoup.el ends here