lisp/gnus/nnsoup.el

   1 ;;; nnsoup.el --- SOUP access for Gnus
   2
   3 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   4 ;;   2004, 2005, 2006, 2007, 2008 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 3, 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., 51 Franklin Street, Fifth Floor,
  25 ;; Boston, MA 02110-1301, 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 (nnheader-concat gnus-home-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 (concat "tar cf - %s | gzip > "
  62                               (expand-file-name gnus-home-directory)
  63                               "Soupin%d.tgz")
  64   "Format string command for packing a SOUP packet.
  65 The SOUP files will be inserted where the %s is in the string.
  66 This string MUST contain both %s and %d.  The file number will be
  67 inserted where %d appears.")
  68
  69 (defvoo nnsoup-unpacker "gunzip -c %s | tar xvf -"
  70   "*Format string command for unpacking a SOUP packet.
  71 The SOUP packet file name will be inserted at the %s.")
  72
  73 (defvoo nnsoup-packet-directory gnus-home-directory
  74   "*Where nnsoup will look for incoming packets.")
  75
  76 (defvoo nnsoup-packet-regexp "Soupout"
  77   "*Regular expression matching SOUP packets in `nnsoup-packet-directory'.")
  78
  79 (defvoo nnsoup-always-save t
  80   "If non-nil commit the reply buffer on each message send.
  81 This is necessary if using message mode outside Gnus with nnsoup as a
  82 backend for the messages.")
  83
  84 \f
  85
  86 (defconst nnsoup-version "nnsoup 0.0"
  87   "nnsoup version.")
  88
  89 (defvoo nnsoup-status-string "")
  90 (defvoo nnsoup-group-alist nil)
  91 (defvoo nnsoup-current-prefix 0)
  92 (defvoo nnsoup-replies-list nil)
  93 (defvoo nnsoup-buffers nil)
  94 (defvoo nnsoup-current-group nil)
  95 (defvoo nnsoup-group-alist-touched nil)
  96 (defvoo nnsoup-article-alist nil)
  97 \f
  98
  99 ;;; Interface functions.
 100
 101 (nnoo-define-basics nnsoup)
 102
 103 (deffoo nnsoup-retrieve-headers (sequence &optional group server fetch-old)
 104   (nnsoup-possibly-change-group group)
 105   (save-excursion
 106     (set-buffer nntp-server-buffer)
 107     (erase-buffer)
 108     (let ((areas (cddr (assoc nnsoup-current-group nnsoup-group-alist)))
 109           (articles sequence)
 110           (use-nov t)
 111           useful-areas this-area-seq msg-buf)
 112       (if (stringp (car sequence))
 113           ;; We don't support fetching by Message-ID.
 114           'headers
 115         ;; We go through all the areas and find which files the
 116         ;; articles in SEQUENCE come from.
 117         (while (and areas sequence)
 118           ;; Peel off areas that are below sequence.
 119           (while (and areas (< (cdar (car areas)) (car sequence)))
 120             (setq areas (cdr areas)))
 121           (when areas
 122             ;; This is a useful area.
 123             (push (car areas) useful-areas)
 124             (setq this-area-seq nil)
 125             ;; We take note whether this MSG has a corresponding IDX
 126             ;; for later use.
 127             (when (or (= (gnus-soup-encoding-index
 128                           (gnus-soup-area-encoding (nth 1 (car areas)))) ?n)
 129                       (not (file-exists-p
 130                             (nnsoup-file
 131                              (gnus-soup-area-prefix (nth 1 (car areas)))))))
 132               (setq use-nov nil))
 133             ;; We assign the portion of `sequence' that is relevant to
 134             ;; this MSG packet to this packet.
 135             (while (and sequence (<= (car sequence) (cdar (car areas))))
 136               (push (car sequence) this-area-seq)
 137               (setq sequence (cdr sequence)))
 138             (setcar useful-areas (cons (nreverse this-area-seq)
 139                                        (car useful-areas)))))
 140
 141         ;; We now have a list of article numbers and corresponding
 142         ;; areas.
 143         (setq useful-areas (nreverse useful-areas))
 144
 145         ;; Two different approaches depending on whether all the MSG
 146         ;; files have corresponding IDX files.  If they all do, we
 147         ;; simply return the relevant IDX files and let Gnus sort out
 148         ;; what lines are relevant.  If some of the IDX files are
 149         ;; missing, we must return HEADs for all the articles.
 150         (if use-nov
 151             ;; We have IDX files for all areas.
 152             (progn
 153               (while useful-areas
 154                 (goto-char (point-max))
 155                 (let ((b (point))
 156                       (number (car (nth 1 (car useful-areas))))
 157                       (index-buffer (nnsoup-index-buffer
 158                                      (gnus-soup-area-prefix
 159                                       (nth 2 (car useful-areas))))))
 160                   (when index-buffer
 161                     (insert-buffer-substring index-buffer)
 162                     (goto-char b)
 163                     ;; We have to remove the index number entries and
 164                     ;; insert article numbers instead.
 165                     (while (looking-at "[0-9]+")
 166                       (replace-match (int-to-string number) t t)
 167                       (incf number)
 168                       (forward-line 1))))
 169                 (setq useful-areas (cdr useful-areas)))
 170               'nov)
 171           ;; We insert HEADs.
 172           (while useful-areas
 173             (setq articles (caar useful-areas)
 174                   useful-areas (cdr useful-areas))
 175             (while articles
 176               (when (setq msg-buf
 177                           (nnsoup-narrow-to-article
 178                            (car articles) (cdar useful-areas) 'head))
 179                 (goto-char (point-max))
 180                 (insert (format "221 %d Article retrieved.\n" (car articles)))
 181                 (insert-buffer-substring msg-buf)
 182                 (goto-char (point-max))
 183                 (insert ".\n"))
 184               (setq articles (cdr articles))))
 185
 186           (nnheader-fold-continuation-lines)
 187           'headers)))))
 188
 189 (deffoo nnsoup-open-server (server &optional defs)
 190   (nnoo-change-server 'nnsoup server defs)
 191   (when (not (file-exists-p nnsoup-directory))
 192     (condition-case ()
 193         (make-directory nnsoup-directory t)
 194       (error t)))
 195   (cond
 196    ((not (file-exists-p nnsoup-directory))
 197     (nnsoup-close-server)
 198     (nnheader-report 'nnsoup "Couldn't create directory: %s" nnsoup-directory))
 199    ((not (file-directory-p (file-truename nnsoup-directory)))
 200     (nnsoup-close-server)
 201     (nnheader-report 'nnsoup "Not a directory: %s" nnsoup-directory))
 202    (t
 203     (nnsoup-read-active-file)
 204     (nnheader-report 'nnsoup "Opened server %s using directory %s"
 205                      server nnsoup-directory)
 206     t)))
 207
 208 (deffoo nnsoup-request-close ()
 209   (nnsoup-write-active-file)
 210   (nnsoup-write-replies)
 211   (gnus-soup-save-areas)
 212   ;; Kill all nnsoup buffers.
 213   (let (buffer)
 214     (while nnsoup-buffers
 215       (setq buffer (cdr (pop nnsoup-buffers)))
 216       (and buffer
 217            (buffer-name buffer)
 218            (kill-buffer buffer))))
 219   (setq nnsoup-group-alist nil
 220         nnsoup-group-alist-touched nil
 221         nnsoup-current-group nil
 222         nnsoup-replies-list nil)
 223   (nnoo-close-server 'nnoo)
 224   t)
 225
 226 (deffoo nnsoup-request-article (id &optional newsgroup server buffer)
 227   (nnsoup-possibly-change-group newsgroup)
 228   (let (buf)
 229     (save-excursion
 230       (set-buffer (or buffer nntp-server-buffer))
 231       (erase-buffer)
 232       (when (and (not (stringp id))
 233                  (setq buf (nnsoup-narrow-to-article id)))
 234         (insert-buffer-substring buf)
 235         t))))
 236
 237 (deffoo nnsoup-request-group (group &optional server dont-check)
 238   (nnsoup-possibly-change-group group)
 239   (if dont-check
 240       t
 241     (let ((active (cadr (assoc group nnsoup-group-alist))))
 242       (if (not active)
 243           (nnheader-report 'nnsoup "No such group: %s" group)
 244         (nnheader-insert
 245          "211 %d %d %d %s\n"
 246          (max (1+ (- (cdr active) (car active))) 0)
 247          (car active) (cdr active) group)))))
 248
 249 (deffoo nnsoup-request-type (group &optional article)
 250   (nnsoup-possibly-change-group group)
 251   ;; Try to guess the type based on the first article in the group.
 252   (when (not article)
 253     (setq article
 254           (cdar (car (cddr (assoc group nnsoup-group-alist))))))
 255   (if (not article)
 256       'unknown
 257     (let ((kind (gnus-soup-encoding-kind
 258                  (gnus-soup-area-encoding
 259                   (nth 1 (nnsoup-article-to-area
 260                           article nnsoup-current-group))))))
 261       (cond ((= kind ?m) 'mail)
 262             ((= kind ?n) 'news)
 263             (t 'unknown)))))
 264
 265 (deffoo nnsoup-close-group (group &optional server)
 266   ;; Kill all nnsoup buffers.
 267   (let ((buffers nnsoup-buffers)
 268         elem)
 269     (while buffers
 270       (when (equal (car (setq elem (pop buffers))) group)
 271         (setq nnsoup-buffers (delq elem nnsoup-buffers))
 272         (and (cdr elem) (buffer-name (cdr elem))
 273              (kill-buffer (cdr elem))))))
 274   t)
 275
 276 (deffoo nnsoup-request-list (&optional server)
 277   (save-excursion
 278     (set-buffer nntp-server-buffer)
 279     (erase-buffer)
 280     (unless nnsoup-group-alist
 281       (nnsoup-read-active-file))
 282     (let ((alist nnsoup-group-alist)
 283           (standard-output (current-buffer))
 284           entry)
 285       (while (setq entry (pop alist))
 286         (insert (car entry) " ")
 287         (princ (cdadr entry))
 288         (insert " ")
 289         (princ (caadr entry))
 290         (insert " y\n"))
 291       t)))
 292
 293 (deffoo nnsoup-request-scan (group &optional server)
 294   (nnsoup-unpack-packets))
 295
 296 (deffoo nnsoup-request-newgroups (date &optional server)
 297   (nnsoup-request-list))
 298
 299 (deffoo nnsoup-request-list-newsgroups (&optional server)
 300   nil)
 301
 302 (deffoo nnsoup-request-post (&optional server)
 303   (nnsoup-store-reply "news")
 304   t)
 305
 306 (deffoo nnsoup-request-mail (&optional server)
 307   (nnsoup-store-reply "mail")
 308   t)
 309
 310 (deffoo nnsoup-request-expire-articles (articles group &optional server force)
 311   (nnsoup-possibly-change-group group)
 312   (let* ((total-infolist (assoc group nnsoup-group-alist))
 313          (active (cadr total-infolist))
 314          (infolist (cddr total-infolist))
 315          info range-list mod-time prefix)
 316     (while infolist
 317       (setq info (pop infolist)
 318             range-list (gnus-uncompress-range (car info))
 319             prefix (gnus-soup-area-prefix (nth 1 info)))
 320       (when;; All the articles in this file are marked for expiry.
 321           (and (or (setq mod-time (nth 5 (file-attributes
 322                                           (nnsoup-file prefix))))
 323                    (setq mod-time (nth 5 (file-attributes
 324                                           (nnsoup-file prefix t)))))
 325                (gnus-sublist-p articles range-list)
 326                ;; This file is old enough.
 327                (nnmail-expired-article-p group mod-time force))
 328         ;; Ok, we delete this file.
 329         (when (ignore-errors
 330                 (nnheader-message
 331                  5 "Deleting %s in group %s..." (nnsoup-file prefix)
 332                  group)
 333                 (when (file-exists-p (nnsoup-file prefix))
 334                   (delete-file (nnsoup-file prefix)))
 335                 (nnheader-message
 336                  5 "Deleting %s in group %s..." (nnsoup-file prefix t)
 337                  group)
 338                 (when (file-exists-p (nnsoup-file prefix t))
 339                   (delete-file (nnsoup-file prefix t)))
 340                 t)
 341           (setcdr (cdr total-infolist) (delq info (cddr total-infolist)))
 342           (setq articles (gnus-sorted-difference articles range-list))))
 343       (when (not mod-time)
 344         (setcdr (cdr total-infolist) (delq info (cddr total-infolist)))))
 345     (if (cddr total-infolist)
 346         (setcar active (caaadr (cdr total-infolist)))
 347       (setcar active (1+ (cdr active))))
 348     (nnsoup-write-active-file t)
 349     ;; Return the articles that weren't expired.
 350     articles))
 351
 352 \f
 353 ;;; Internal functions
 354
 355 (defun nnsoup-possibly-change-group (group &optional force)
 356   (when (and group
 357              (not (equal nnsoup-current-group group)))
 358     (setq nnsoup-article-alist nil)
 359     (setq nnsoup-current-group group))
 360   t)
 361
 362 (defun nnsoup-read-active-file ()
 363   (setq nnsoup-group-alist nil)
 364   (when (file-exists-p nnsoup-active-file)
 365     (ignore-errors
 366       (load nnsoup-active-file t t t))
 367     ;; Be backwards compatible.
 368     (when (and nnsoup-group-alist
 369                (not (atom (caadar nnsoup-group-alist))))
 370       (let ((alist nnsoup-group-alist)
 371             entry e min max)
 372         (while (setq e (cdr (setq entry (pop alist))))
 373           (setq min (caaar e))
 374           (setq max (cdar (car (last 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 name 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     (dolist (packet packets)
 561       (nnheader-message 5 "nnsoup: unpacking %s..." packet)
 562       (if (not (gnus-soup-unpack-packet
 563                 nnsoup-tmp-directory nnsoup-unpacker packet))
 564           (nnheader-message 5 "Couldn't unpack %s" packet)
 565         (delete-file packet)
 566         (nnsoup-read-areas)
 567         (nnheader-message 5 "Unpacking...done")))))
 568
 569 (defun nnsoup-narrow-to-article (article &optional area head)
 570   (let* ((area (or area (nnsoup-article-to-area article nnsoup-current-group)))
 571          (prefix (and area (gnus-soup-area-prefix (nth 1 area))))
 572          (msg-buf (and prefix (nnsoup-index-buffer prefix 'msg)))
 573          beg end)
 574     (when area
 575       (save-excursion
 576         (cond
 577          ;; There is no MSG file.
 578          ((null msg-buf)
 579           nil)
 580          ;; We use the index file to find out where the article
 581          ;; begins and ends.
 582          ((and (= (gnus-soup-encoding-index
 583                    (gnus-soup-area-encoding (nth 1 area)))
 584                   ?c)
 585                (file-exists-p (nnsoup-file prefix)))
 586           (set-buffer (nnsoup-index-buffer prefix))
 587           (widen)
 588           (goto-char (point-min))
 589           (forward-line (- article (caar area)))
 590           (setq beg (read (current-buffer)))
 591           (forward-line 1)
 592           (if (looking-at "[0-9]+")
 593               (progn
 594                 (setq end (read (current-buffer)))
 595                 (set-buffer msg-buf)
 596                 (widen)
 597                 (let ((format (gnus-soup-encoding-format
 598                                (gnus-soup-area-encoding (nth 1 area)))))
 599                   (goto-char end)
 600                   (when (or (= format ?u) (= format ?n) (= format ?m))
 601                     (setq end (progn (forward-line -1) (point))))))
 602             (set-buffer msg-buf))
 603           (widen)
 604           (narrow-to-region beg (or end (point-max))))
 605          (t
 606           (set-buffer msg-buf)
 607           (widen)
 608           (unless (assoc (gnus-soup-area-prefix (nth 1 area))
 609                          nnsoup-article-alist)
 610             (nnsoup-dissect-buffer (nth 1 area)))
 611           (let ((entry (assq article (cdr (assoc (gnus-soup-area-prefix
 612                                                   (nth 1 area))
 613                                                  nnsoup-article-alist)))))
 614             (when entry
 615               (narrow-to-region (cadr entry) (caddr entry))))))
 616         (goto-char (point-min))
 617         (if (not head)
 618             ()
 619           (narrow-to-region
 620            (point-min)
 621            (if (search-forward "\n\n" nil t)
 622                (1- (point))
 623              (point-max))))
 624         msg-buf))))
 625
 626 ;;;###autoload
 627 (defun nnsoup-pack-replies ()
 628   "Make an outbound package of SOUP replies."
 629   (interactive)
 630   (unless (file-exists-p nnsoup-replies-directory)
 631     (nnheader-message 5 "No such directory: %s" nnsoup-replies-directory))
 632   ;; Write all data buffers.
 633   (gnus-soup-save-areas)
 634   ;; Write the active file.
 635   (nnsoup-write-active-file)
 636   ;; Write the REPLIES file.
 637   (nnsoup-write-replies)
 638   ;; Check whether there is anything here.
 639   (when (null (directory-files nnsoup-replies-directory nil "\\.MSG$"))
 640     (error "No files to pack"))
 641   ;; Pack all these files into a SOUP packet.
 642   (gnus-soup-pack nnsoup-replies-directory nnsoup-packer))
 643
 644 (defun nnsoup-write-replies ()
 645   "Write the REPLIES file."
 646   (when nnsoup-replies-list
 647     (gnus-soup-write-replies nnsoup-replies-directory nnsoup-replies-list)
 648     (setq nnsoup-replies-list nil)))
 649
 650 (defun nnsoup-article-to-area (article group)
 651   "Return the area that ARTICLE in GROUP is located in."
 652   (let ((areas (cddr (assoc group nnsoup-group-alist))))
 653     (while (and areas (< (cdar (car areas)) article))
 654       (setq areas (cdr areas)))
 655     (and areas (car areas))))
 656
 657 (defvar nnsoup-old-functions
 658   (list message-send-mail-real-function message-send-news-function))
 659
 660 ;;;###autoload
 661 (defun nnsoup-set-variables ()
 662   "Use the SOUP methods for posting news and mailing mail."
 663   (interactive)
 664   (setq message-send-news-function 'nnsoup-request-post)
 665   (setq message-send-mail-real-function 'nnsoup-request-mail))
 666
 667 ;;;###autoload
 668 (defun nnsoup-revert-variables ()
 669   "Revert posting and mailing methods to the standard Emacs methods."
 670   (interactive)
 671   (setq message-send-mail-real-function (car nnsoup-old-functions))
 672   (setq message-send-news-function (cadr nnsoup-old-functions)))
 673
 674 (defun nnsoup-store-reply (kind)
 675   ;; Mostly stolen from `message.el'.
 676   (require 'mail-utils)
 677   (let ((tembuf (generate-new-buffer " message temp"))
 678         (case-fold-search nil)
 679         delimline
 680         (mailbuf (current-buffer)))
 681     (unwind-protect
 682         (save-excursion
 683           (save-restriction
 684             (message-narrow-to-headers)
 685             (if (equal kind "mail")
 686                 (message-generate-headers message-required-mail-headers)
 687               (message-generate-headers message-required-news-headers)))
 688           (set-buffer tembuf)
 689           (erase-buffer)
 690           (insert-buffer-substring mailbuf)
 691           ;; Remove some headers.
 692           (save-restriction
 693             (message-narrow-to-headers)
 694             ;; Remove some headers.
 695             (message-remove-header message-ignored-mail-headers t))
 696           (goto-char (point-max))
 697           ;; require one newline at the end.
 698           (or (= (preceding-char) ?\n)
 699               (insert ?\n))
 700           (let ((case-fold-search t))
 701             ;; Change header-delimiter to be what sendmail expects.
 702             (goto-char (point-min))
 703             (re-search-forward
 704              (concat "^" (regexp-quote mail-header-separator) "\n"))
 705             (replace-match "\n")
 706             (backward-char 1)
 707             (setq delimline (point-marker))
 708             (goto-char (1+ delimline))
 709             (let ((msg-buf
 710                    (gnus-soup-store
 711                     nnsoup-replies-directory
 712                     (nnsoup-kind-to-prefix kind) nil nnsoup-replies-format-type
 713                     nnsoup-replies-index-type))
 714                   (num 0))
 715               (when (and msg-buf (bufferp msg-buf))
 716                 (save-excursion
 717                   (set-buffer msg-buf)
 718                   (goto-char (point-min))
 719                   (while (re-search-forward "^#! *rnews" nil t)
 720                     (incf num))
 721                   (when nnsoup-always-save
 722                     (save-buffer)))
 723                 (nnheader-message 5 "Stored %d messages" num)))
 724             (nnsoup-write-replies)
 725             (kill-buffer tembuf))))))
 726
 727 (defun nnsoup-kind-to-prefix (kind)
 728   (unless nnsoup-replies-list
 729     (setq nnsoup-replies-list
 730           (gnus-soup-parse-replies
 731            (expand-file-name "REPLIES" nnsoup-replies-directory))))
 732   (let ((replies nnsoup-replies-list))
 733     (while (and replies
 734                 (not (string= kind (gnus-soup-reply-kind (car replies)))))
 735       (setq replies (cdr replies)))
 736     (if replies
 737         (gnus-soup-reply-prefix (car replies))
 738       (push (vector (gnus-soup-unique-prefix nnsoup-replies-directory)
 739                     kind
 740                     (format "%c%c%c"
 741                             nnsoup-replies-format-type
 742                             nnsoup-replies-index-type
 743                             (if (string= kind "news")
 744                                 ?n ?m)))
 745             nnsoup-replies-list)
 746       (gnus-soup-reply-prefix (car nnsoup-replies-list)))))
 747
 748 (defun nnsoup-make-active ()
 749   "(Re-)create the SOUP active file."
 750   (interactive)
 751   (let ((files (sort (directory-files nnsoup-directory t "IDX$")
 752                      (lambda (f1 f2)
 753                        (< (progn (string-match "/\\([0-9]+\\)\\." f1)
 754                                  (string-to-number (match-string 1 f1)))
 755                           (progn (string-match "/\\([0-9]+\\)\\." f2)
 756                                  (string-to-number (match-string 1 f2)))))))
 757         active group lines ident elem min)
 758     (set-buffer (get-buffer-create " *nnsoup work*"))
 759     (dolist (file files)
 760       (nnheader-message 5 "Doing %s..." file)
 761       (erase-buffer)
 762       (nnheader-insert-file-contents file)
 763       (goto-char (point-min))
 764       (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))
 765           (setq group "unknown")
 766         (setq group (match-string 2)))
 767       (setq lines (count-lines (point-min) (point-max)))
 768       (setq ident (progn (string-match
 769                           "/\\([0-9]+\\)\\." file)
 770                          (match-string 1 file)))
 771       (if (not (setq elem (assoc group active)))
 772           (push (list group (cons 1 lines)
 773                       (list (cons 1 lines)
 774                             (vector ident group "ucm" "" lines)))
 775                 active)
 776         (nconc elem
 777                (list
 778                 (list (cons (1+ (setq min (cdadr elem)))
 779                             (+ min lines))
 780                       (vector ident group "ucm" "" lines))))
 781         (setcdr (cadr elem) (+ min lines))))
 782     (nnheader-message 5 "")
 783     (setq nnsoup-group-alist active)
 784     (nnsoup-write-active-file t)))
 785
 786 (defun nnsoup-delete-unreferenced-message-files ()
 787   "Delete any *.MSG and *.IDX files that aren't known by nnsoup."
 788   (interactive)
 789   (let* ((known (apply 'nconc (mapcar
 790                                (lambda (ga)
 791                                  (mapcar
 792                                   (lambda (area)
 793                                     (gnus-soup-area-prefix (cadr area)))
 794                                   (cddr ga)))
 795                                nnsoup-group-alist)))
 796          (regexp "\\.MSG$\\|\\.IDX$")
 797          (files (directory-files nnsoup-directory nil regexp))
 798          non-files)
 799     ;; Find all files that aren't known by nnsoup.
 800     (dolist (file files)
 801       (string-match regexp file)
 802       (unless (member (substring file 0 (match-beginning 0)) known)
 803         (push file non-files)))
 804     ;; Sort and delete the files.
 805     (setq non-files (sort non-files 'string<))
 806     (map-y-or-n-p "Delete file %s? "
 807                   (lambda (file) (delete-file
 808                                   (expand-file-name file nnsoup-directory)))
 809                   non-files)))
 810
 811 (provide 'nnsoup)
 812
 813 ;; arch-tag: b0451389-5703-4450-9425-f66f6b38c828
 814 ;;; nnsoup.el ends here