lisp/gnus/nnbabyl.el

   1 ;;; nnbabyl.el --- rmail mbox access for Gnus
   2
   3 ;; Copyright (C) 1995-2014 Free Software Foundation, Inc.
   4
   5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   6 ;;      Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
   7 ;; Keywords: news, mail
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;; For an overview of what the interface functions do, please see the
  27 ;; Gnus sources.
  28
  29 ;;; Code:
  30
  31 (require 'nnheader)
  32 (condition-case nil
  33     (require 'rmail)
  34   (error (nnheader-message
  35       5 "Ignore rmail errors from this file, you don't have rmail")))
  36 (require 'nnmail)
  37 (require 'nnoo)
  38 (eval-when-compile (require 'cl))
  39
  40 (nnoo-declare nnbabyl)
  41
  42 (defvoo nnbabyl-mbox-file (expand-file-name "~/RMAIL")
  43   "The name of the rmail box file in the users home directory.")
  44
  45 (defvoo nnbabyl-active-file (expand-file-name "~/.rmail-active")
  46   "The name of the active file for the rmail box.")
  47
  48 (defvoo nnbabyl-get-new-mail t
  49   "If non-nil, nnbabyl will check the incoming mail file and split the mail.")
  50
  51
  52 (defvoo nnbabyl-prepare-save-mail-hook nil
  53   "Hook run narrowed to an article before saving.")
  54
  55 \f
  56
  57 (defvar nnbabyl-mail-delimiter "\^_")
  58
  59 (defconst nnbabyl-version "nnbabyl 1.0"
  60   "nnbabyl version.")
  61
  62 (defvoo nnbabyl-mbox-buffer nil)
  63 (defvoo nnbabyl-current-group nil)
  64 (defvoo nnbabyl-status-string "")
  65 (defvoo nnbabyl-group-alist nil)
  66 (defvoo nnbabyl-active-timestamp nil)
  67
  68 (defvoo nnbabyl-previous-buffer-mode nil)
  69
  70 \f
  71
  72 ;;; Interface functions
  73
  74 (nnoo-define-basics nnbabyl)
  75
  76 (deffoo nnbabyl-retrieve-headers (articles &optional group server fetch-old)
  77   (with-current-buffer nntp-server-buffer
  78     (erase-buffer)
  79     (let ((number (length articles))
  80           (count 0)
  81           (delim (concat "^" nnbabyl-mail-delimiter))
  82           article art-string start stop)
  83       (nnbabyl-possibly-change-newsgroup group server)
  84       (while (setq article (pop articles))
  85         (setq art-string (nnbabyl-article-string article))
  86         (set-buffer nnbabyl-mbox-buffer)
  87         (end-of-line)
  88         (when (or (search-forward art-string nil t)
  89                   (search-backward art-string nil t))
  90           (unless (re-search-backward delim nil t)
  91             (goto-char (point-min)))
  92           (while (and (not (looking-at ".+:"))
  93                       (zerop (forward-line 1))))
  94           (setq start (point))
  95           (search-forward "\n\n" nil t)
  96           (setq stop (1- (point)))
  97           (set-buffer nntp-server-buffer)
  98           (insert "221 ")
  99           (princ article (current-buffer))
 100           (insert " Article retrieved.\n")
 101           (insert-buffer-substring nnbabyl-mbox-buffer start stop)
 102           (goto-char (point-max))
 103           (insert ".\n"))
 104         (and (numberp nnmail-large-newsgroup)
 105              (> number nnmail-large-newsgroup)
 106              (zerop (% (incf count) 20))
 107              (nnheader-message 5 "nnbabyl: Receiving headers... %d%%"
 108                                (/ (* count 100) number))))
 109
 110       (and (numberp nnmail-large-newsgroup)
 111            (> number nnmail-large-newsgroup)
 112            (nnheader-message 5 "nnbabyl: Receiving headers...done"))
 113
 114       (set-buffer nntp-server-buffer)
 115       (nnheader-fold-continuation-lines)
 116       'headers)))
 117
 118 (deffoo nnbabyl-open-server (server &optional defs)
 119   (nnoo-change-server 'nnbabyl server defs)
 120   (nnbabyl-create-mbox)
 121   (cond
 122    ((not (file-exists-p nnbabyl-mbox-file))
 123     (nnbabyl-close-server)
 124     (nnheader-report 'nnbabyl "No such file: %s" nnbabyl-mbox-file))
 125    ((file-directory-p nnbabyl-mbox-file)
 126     (nnbabyl-close-server)
 127     (nnheader-report 'nnbabyl "Not a regular file: %s" nnbabyl-mbox-file))
 128    (t
 129     (nnheader-report 'nnbabyl "Opened server %s using mbox %s" server
 130                      nnbabyl-mbox-file)
 131     t)))
 132
 133 (deffoo nnbabyl-close-server (&optional server)
 134   ;; Restore buffer mode.
 135   (when (and (nnbabyl-server-opened)
 136              nnbabyl-previous-buffer-mode)
 137     (with-current-buffer nnbabyl-mbox-buffer
 138       (narrow-to-region
 139        (caar nnbabyl-previous-buffer-mode)
 140        (cdar nnbabyl-previous-buffer-mode))
 141       (funcall (cdr nnbabyl-previous-buffer-mode))))
 142   (nnoo-close-server 'nnbabyl server)
 143   (setq nnbabyl-mbox-buffer nil)
 144   t)
 145
 146 (deffoo nnbabyl-server-opened (&optional server)
 147   (and (nnoo-current-server-p 'nnbabyl server)
 148        nnbabyl-mbox-buffer
 149        (buffer-name nnbabyl-mbox-buffer)
 150        nntp-server-buffer
 151        (buffer-name nntp-server-buffer)))
 152
 153 (deffoo nnbabyl-request-article (article &optional newsgroup server buffer)
 154   (nnbabyl-possibly-change-newsgroup newsgroup server)
 155   (with-current-buffer nnbabyl-mbox-buffer
 156     (goto-char (point-min))
 157     (when (search-forward (nnbabyl-article-string article) nil t)
 158       (let (start stop summary-line)
 159         (unless (re-search-backward (concat "^" nnbabyl-mail-delimiter) nil t)
 160           (goto-char (point-min))
 161           (end-of-line))
 162         (while (and (not (looking-at ".+:"))
 163                     (zerop (forward-line 1))))
 164         (setq start (point))
 165         (or (when (re-search-forward
 166                    (concat "^" nnbabyl-mail-delimiter) nil t)
 167               (beginning-of-line)
 168               t)
 169             (goto-char (point-max)))
 170         (setq stop (point))
 171         (let ((nntp-server-buffer (or buffer nntp-server-buffer)))
 172           (set-buffer nntp-server-buffer)
 173           (erase-buffer)
 174           (insert-buffer-substring nnbabyl-mbox-buffer start stop)
 175           (goto-char (point-min))
 176           ;; If there is an EOOH header, then we have to remove some
 177           ;; duplicated headers.
 178           (setq summary-line (looking-at "Summary-line:"))
 179           (when (search-forward "\n*** EOOH ***" nil t)
 180             (if summary-line
 181                 ;; The headers to be deleted are located before the
 182                 ;; EOOH line...
 183                 (delete-region (point-min) (progn (forward-line 1)
 184                                                   (point)))
 185               ;; ...or after.
 186               (delete-region (progn (beginning-of-line) (point))
 187                              (or (search-forward "\n\n" nil t)
 188                                  (point)))))
 189           (if (numberp article)
 190               (cons nnbabyl-current-group article)
 191             (nnbabyl-article-group-number)))))))
 192
 193 (deffoo nnbabyl-request-group (group &optional server dont-check info)
 194   (let ((active (cadr (assoc group nnbabyl-group-alist))))
 195     (save-excursion
 196       (cond
 197        ((or (null active)
 198             (null (nnbabyl-possibly-change-newsgroup group server)))
 199         (nnheader-report 'nnbabyl "No such group: %s" group))
 200        (dont-check
 201         (nnheader-report 'nnbabyl "Selected group %s" group)
 202         (nnheader-insert ""))
 203        (t
 204         (nnheader-report 'nnbabyl "Selected group %s" group)
 205         (nnheader-insert "211 %d %d %d %s\n"
 206                          (1+ (- (cdr active) (car active)))
 207                          (car active) (cdr active) group))))))
 208
 209 (deffoo nnbabyl-request-scan (&optional group server)
 210   (nnbabyl-possibly-change-newsgroup group server)
 211   (nnbabyl-read-mbox)
 212   (nnmail-get-new-mail
 213    'nnbabyl
 214    (lambda ()
 215      (with-current-buffer nnbabyl-mbox-buffer
 216        (save-buffer)))
 217    (file-name-directory nnbabyl-mbox-file)
 218    group
 219    (lambda ()
 220      (save-excursion
 221        (let ((in-buf (current-buffer)))
 222          (goto-char (point-min))
 223          (while (search-forward "\n\^_\n" nil t)
 224            (delete-char -1))
 225          (set-buffer nnbabyl-mbox-buffer)
 226          (goto-char (point-max))
 227          (search-backward "\n\^_" nil t)
 228          (goto-char (match-end 0))
 229          (insert-buffer-substring in-buf)))
 230      (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file))))
 231
 232 (deffoo nnbabyl-close-group (group &optional server)
 233   t)
 234
 235 (deffoo nnbabyl-request-create-group (group &optional server args)
 236   (nnmail-activate 'nnbabyl)
 237   (unless (assoc group nnbabyl-group-alist)
 238     (push (list group (cons 1 0))
 239           nnbabyl-group-alist)
 240     (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file))
 241   t)
 242
 243 (deffoo nnbabyl-request-list (&optional server)
 244   (save-excursion
 245     (nnmail-find-file nnbabyl-active-file)
 246     (setq nnbabyl-group-alist (nnmail-get-active))
 247     t))
 248
 249 (deffoo nnbabyl-request-newgroups (date &optional server)
 250   (nnbabyl-request-list server))
 251
 252 (deffoo nnbabyl-request-list-newsgroups (&optional server)
 253   (nnheader-report 'nnbabyl "nnbabyl: LIST NEWSGROUPS is not implemented."))
 254
 255 (deffoo nnbabyl-request-expire-articles
 256     (articles newsgroup &optional server force)
 257   (nnbabyl-possibly-change-newsgroup newsgroup server)
 258   (let* ((is-old t)
 259          rest)
 260     (nnmail-activate 'nnbabyl)
 261
 262     (with-current-buffer nnbabyl-mbox-buffer
 263       (set-text-properties (point-min) (point-max) nil)
 264       (while (and articles is-old)
 265         (goto-char (point-min))
 266         (when (search-forward (nnbabyl-article-string (car articles)) nil t)
 267           (if (setq is-old
 268                     (nnmail-expired-article-p
 269                      newsgroup
 270                      (buffer-substring
 271                       (point) (progn (end-of-line) (point))) force))
 272               (progn
 273                 (unless (eq nnmail-expiry-target 'delete)
 274                   (with-temp-buffer
 275                     (nnbabyl-request-article (car articles)
 276                                              newsgroup server
 277                                              (current-buffer))
 278                     (let ((nnml-current-directory nil))
 279                       (nnmail-expiry-target-group
 280                        nnmail-expiry-target newsgroup)))
 281                   (nnbabyl-possibly-change-newsgroup newsgroup server))
 282                 (nnheader-message 5 "Deleting article %d in %s..."
 283                                   (car articles) newsgroup)
 284                 (nnbabyl-delete-mail))
 285             (push (car articles) rest)))
 286         (setq articles (cdr articles)))
 287       (save-buffer)
 288       ;; Find the lowest active article in this group.
 289       (let ((active (nth 1 (assoc newsgroup nnbabyl-group-alist))))
 290         (goto-char (point-min))
 291         (while (and (not (search-forward
 292                           (nnbabyl-article-string (car active)) nil t))
 293                     (<= (car active) (cdr active)))
 294           (setcar active (1+ (car active)))
 295           (goto-char (point-min))))
 296       (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
 297       (nconc rest articles))))
 298
 299 (deffoo nnbabyl-request-move-article
 300     (article group server accept-form &optional last move-is-internal)
 301   (let ((buf (get-buffer-create " *nnbabyl move*"))
 302         result)
 303     (and
 304      (nnbabyl-request-article article group server)
 305      (with-current-buffer buf
 306        (insert-buffer-substring nntp-server-buffer)
 307        (goto-char (point-min))
 308        (while (re-search-forward
 309                "^X-Gnus-Newsgroup:"
 310                (save-excursion (search-forward "\n\n" nil t) (point)) t)
 311          (delete-region (point-at-bol) (progn (forward-line 1) (point))))
 312        (setq result (eval accept-form))
 313        (kill-buffer (current-buffer))
 314        result)
 315      (save-excursion
 316        (nnbabyl-possibly-change-newsgroup group server)
 317        (set-buffer nnbabyl-mbox-buffer)
 318        (goto-char (point-min))
 319        (if (search-forward (nnbabyl-article-string article) nil t)
 320            (nnbabyl-delete-mail))
 321        (and last (save-buffer))))
 322     result))
 323
 324 (deffoo nnbabyl-request-accept-article (group &optional server last)
 325   (nnbabyl-possibly-change-newsgroup group server)
 326   (nnmail-check-syntax)
 327   (let ((buf (current-buffer))
 328         result beg)
 329     (and
 330      (nnmail-activate 'nnbabyl)
 331      (save-excursion
 332        (goto-char (point-min))
 333        (search-forward "\n\n" nil t)
 334        (forward-line -1)
 335        (save-excursion
 336          (while (re-search-backward "^X-Gnus-Newsgroup: " beg t)
 337            (delete-region (point) (progn (forward-line 1) (point)))))
 338        (when nnmail-cache-accepted-message-ids
 339          (nnmail-cache-insert (nnmail-fetch-field "message-id")
 340                               group
 341                               (nnmail-fetch-field "subject")
 342                               (nnmail-fetch-field "from")))
 343        (setq result
 344              (if (stringp group)
 345                  (list (cons group (nnbabyl-active-number group)))
 346                (nnmail-article-group 'nnbabyl-active-number)))
 347        (if (and (null result)
 348                 (yes-or-no-p "Moved to `junk' group; delete article? "))
 349            (setq result 'junk)
 350          (setq result (car (nnbabyl-save-mail result))))
 351        (set-buffer nnbabyl-mbox-buffer)
 352        (goto-char (point-max))
 353        (search-backward "\n\^_")
 354        (goto-char (match-end 0))
 355        (insert-buffer-substring buf)
 356        (when last
 357          (when nnmail-cache-accepted-message-ids
 358            (nnmail-cache-insert (nnmail-fetch-field "message-id")
 359                                 group
 360                                 (nnmail-fetch-field "subject")
 361                                 (nnmail-fetch-field "from")))
 362          (save-buffer)
 363          (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file))
 364        result))))
 365
 366 (deffoo nnbabyl-request-replace-article (article group buffer)
 367   (nnbabyl-possibly-change-newsgroup group)
 368   (with-current-buffer nnbabyl-mbox-buffer
 369     (goto-char (point-min))
 370     (if (not (search-forward (nnbabyl-article-string article) nil t))
 371         nil
 372       (nnbabyl-delete-mail t t)
 373       (insert-buffer-substring buffer)
 374       (save-buffer)
 375       t)))
 376
 377 (deffoo nnbabyl-request-delete-group (group &optional force server)
 378   (nnbabyl-possibly-change-newsgroup group server)
 379   ;; Delete all articles in GROUP.
 380   (if (not force)
 381       ()                                ; Don't delete the articles.
 382     (with-current-buffer nnbabyl-mbox-buffer
 383       (goto-char (point-min))
 384       ;; Delete all articles in this group.
 385       (let ((ident (concat "\nX-Gnus-Newsgroup: " nnbabyl-current-group ":"))
 386             found)
 387         (while (search-forward ident nil t)
 388           (setq found t)
 389           (nnbabyl-delete-mail))
 390         (when found
 391           (save-buffer)))))
 392   ;; Remove the group from all structures.
 393   (setq nnbabyl-group-alist
 394         (delq (assoc group nnbabyl-group-alist) nnbabyl-group-alist)
 395         nnbabyl-current-group nil)
 396   ;; Save the active file.
 397   (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
 398   t)
 399
 400 (deffoo nnbabyl-request-rename-group (group new-name &optional server)
 401   (nnbabyl-possibly-change-newsgroup group server)
 402   (with-current-buffer nnbabyl-mbox-buffer
 403     (goto-char (point-min))
 404     (let ((ident (concat "\nX-Gnus-Newsgroup: " nnbabyl-current-group ":"))
 405           (new-ident (concat "\nX-Gnus-Newsgroup: " new-name ":"))
 406           found)
 407       (while (search-forward ident nil t)
 408         (replace-match new-ident t t)
 409         (setq found t))
 410       (when found
 411         (save-buffer))))
 412   (let ((entry (assoc group nnbabyl-group-alist)))
 413     (and entry (setcar entry new-name))
 414     (setq nnbabyl-current-group nil)
 415     ;; Save the new group alist.
 416     (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
 417     t))
 418
 419 \f
 420 ;;; Internal functions.
 421
 422 ;; If FORCE, delete article no matter how many X-Gnus-Newsgroup
 423 ;; headers there are.  If LEAVE-DELIM, don't delete the Unix mbox
 424 ;; delimiter line.
 425 (defun nnbabyl-delete-mail (&optional force leave-delim)
 426   ;; Delete the current X-Gnus-Newsgroup line.
 427   (unless force
 428     (delete-region (point-at-bol) (progn (forward-line 1) (point))))
 429   ;; Beginning of the article.
 430   (save-excursion
 431     (save-restriction
 432       (widen)
 433       (narrow-to-region
 434        (save-excursion
 435          (unless (re-search-backward (concat "^" nnbabyl-mail-delimiter) nil t)
 436            (goto-char (point-min))
 437            (end-of-line))
 438          (if leave-delim (progn (forward-line 1) (point))
 439            (match-beginning 0)))
 440        (progn
 441          (forward-line 1)
 442          (or (and (re-search-forward (concat "^" nnbabyl-mail-delimiter)
 443                                      nil t)
 444                   (match-beginning 0))
 445              (point-max))))
 446       (goto-char (point-min))
 447       ;; Only delete the article if no other groups owns it as well.
 448       (when (or force (not (re-search-forward "^X-Gnus-Newsgroup: " nil t)))
 449         (delete-region (point-min) (point-max))))))
 450
 451 (defun nnbabyl-possibly-change-newsgroup (newsgroup &optional server)
 452   (when (and server
 453              (not (nnbabyl-server-opened server)))
 454     (nnbabyl-open-server server))
 455   (when (or (not nnbabyl-mbox-buffer)
 456             (not (buffer-name nnbabyl-mbox-buffer)))
 457     (save-excursion (nnbabyl-read-mbox)))
 458   (unless nnbabyl-group-alist
 459     (nnmail-activate 'nnbabyl))
 460   (if newsgroup
 461       (if (assoc newsgroup nnbabyl-group-alist)
 462           (setq nnbabyl-current-group newsgroup)
 463         (nnheader-report 'nnbabyl "No such group in file"))
 464     t))
 465
 466 (defun nnbabyl-article-string (article)
 467   (if (numberp article)
 468       (concat "\nX-Gnus-Newsgroup: " nnbabyl-current-group ":"
 469               (int-to-string article) " ")
 470     (concat "\nMessage-ID: " article)))
 471
 472 (defun nnbabyl-article-group-number ()
 473   (save-excursion
 474     (goto-char (point-min))
 475     (when (re-search-forward "^X-Gnus-Newsgroup: +\\([^:]+\\):\\([0-9]+\\) "
 476                              nil t)
 477       (cons (buffer-substring (match-beginning 1) (match-end 1))
 478             (string-to-number
 479              (buffer-substring (match-beginning 2) (match-end 2)))))))
 480
 481 (defun nnbabyl-insert-lines ()
 482   "Insert how many lines and chars there are in the body of the mail."
 483   (let (lines chars)
 484     (save-excursion
 485       (goto-char (point-min))
 486       (when (search-forward "\n\n" nil t)
 487         ;; There may be an EOOH line here...
 488         (when (looking-at "\\*\\*\\* EOOH \\*\\*\\*")
 489           (search-forward "\n\n" nil t))
 490         (setq chars (- (point-max) (point))
 491               lines (max (- (count-lines (point) (point-max)) 1) 0))
 492         ;; Move back to the end of the headers.
 493         (goto-char (point-min))
 494         (search-forward "\n\n" nil t)
 495         (forward-char -1)
 496         (save-excursion
 497           (when (re-search-backward "^Lines: " nil t)
 498             (delete-region (point) (progn (forward-line 1) (point)))))
 499         (insert (format "Lines: %d\n" lines))
 500         chars))))
 501
 502 (defun nnbabyl-save-mail (group-art)
 503   ;; Called narrowed to an article.
 504   (nnbabyl-insert-lines)
 505   (nnmail-insert-xref group-art)
 506   (nnbabyl-insert-newsgroup-line group-art)
 507   (run-hooks 'nnbabyl-prepare-save-mail-hook)
 508   group-art)
 509
 510 (defun nnbabyl-insert-newsgroup-line (group-art)
 511   (save-excursion
 512     (goto-char (point-min))
 513     (while (looking-at "From ")
 514       (replace-match "Mail-from: From " t t)
 515       (forward-line 1))
 516     ;; If there is a C-l at the beginning of the narrowed region, this
 517     ;; isn't really a "save", but rather a "scan".
 518     (goto-char (point-min))
 519     (unless (looking-at "\^L")
 520       (save-excursion
 521         (insert "\^L\n0, unseen,,\n*** EOOH ***\n")
 522         (goto-char (point-max))
 523         (insert "\^_\n")))
 524     (when (search-forward "\n\n" nil t)
 525       (forward-char -1)
 526       (while group-art
 527         (insert (format "X-Gnus-Newsgroup: %s:%d   %s\n"
 528                         (caar group-art) (cdar group-art)
 529                         (current-time-string)))
 530         (setq group-art (cdr group-art))))
 531     t))
 532
 533 (defun nnbabyl-active-number (group)
 534   ;; Find the next article number in GROUP.
 535   (let ((active (cadr (assoc group nnbabyl-group-alist))))
 536     (if active
 537         (setcdr active (1+ (cdr active)))
 538       ;; This group is new, so we create a new entry for it.
 539       ;; This might be a bit naughty... creating groups on the drop of
 540       ;; a hat, but I don't know...
 541       (push (list group (setq active (cons 1 1)))
 542             nnbabyl-group-alist))
 543     (cdr active)))
 544
 545 (defun nnbabyl-create-mbox ()
 546   (unless (file-exists-p nnbabyl-mbox-file)
 547     ;; Create a new, empty RMAIL mbox file.
 548     (with-current-buffer (setq nnbabyl-mbox-buffer
 549                                (create-file-buffer nnbabyl-mbox-file))
 550       (setq buffer-file-name nnbabyl-mbox-file)
 551       (insert "BABYL OPTIONS:\n\n\^_")
 552       (nnmail-write-region
 553        (point-min) (point-max) nnbabyl-mbox-file t 'nomesg))))
 554
 555 (defun nnbabyl-read-mbox ()
 556   (nnmail-activate 'nnbabyl)
 557   (nnbabyl-create-mbox)
 558
 559   (unless (and nnbabyl-mbox-buffer
 560                (buffer-name nnbabyl-mbox-buffer)
 561                (with-current-buffer nnbabyl-mbox-buffer
 562                  (= (buffer-size) (nnheader-file-size nnbabyl-mbox-file))))
 563     ;; This buffer has changed since we read it last.  Possibly.
 564     (save-excursion
 565       (let ((delim (concat "^" nnbabyl-mail-delimiter))
 566             (alist nnbabyl-group-alist)
 567             start end number)
 568         (set-buffer (setq nnbabyl-mbox-buffer
 569                           (nnheader-find-file-noselect
 570                            nnbabyl-mbox-file nil t)))
 571         ;; Save previous buffer mode.
 572         (setq nnbabyl-previous-buffer-mode
 573               (cons (cons (point-min) (point-max))
 574                     major-mode))
 575
 576         (buffer-disable-undo)
 577         (widen)
 578         (setq buffer-read-only nil)
 579         (fundamental-mode)
 580
 581         ;; Go through the group alist and compare against
 582         ;; the rmail file.
 583         (while alist
 584           (goto-char (point-max))
 585           (when (and (re-search-backward
 586                       (format "^X-Gnus-Newsgroup: %s:\\([0-9]+\\) "
 587                               (caar alist))
 588                       nil t)
 589                      (> (setq number
 590                               (string-to-number
 591                                (buffer-substring
 592                                 (match-beginning 1) (match-end 1))))
 593                         (cdadar alist)))
 594             (setcdr (cadar alist) number))
 595           (setq alist (cdr alist)))
 596
 597         ;; We go through the mbox and make sure that each and
 598         ;; every mail belongs to some group or other.
 599         (goto-char (point-min))
 600         (if (looking-at "\^L")
 601             (setq start (point))
 602           (re-search-forward delim nil t)
 603           (setq start (match-end 0)))
 604         (while (re-search-forward delim nil t)
 605           (setq end (match-end 0))
 606           (unless (search-backward "\nX-Gnus-Newsgroup: " start t)
 607             (goto-char end)
 608             (save-excursion
 609               (save-restriction
 610                 (narrow-to-region (goto-char start) end)
 611                 (nnbabyl-save-mail
 612                  (nnmail-article-group 'nnbabyl-active-number))
 613                 (setq end (point-max)))))
 614           (goto-char (setq start end)))
 615         (when (buffer-modified-p (current-buffer))
 616           (save-buffer))
 617         (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)))))
 618
 619 (defun nnbabyl-remove-incoming-delims ()
 620   (goto-char (point-min))
 621   (while (search-forward "\^_" nil t)
 622     (replace-match "?" t t)))
 623
 624 (defun nnbabyl-check-mbox ()
 625   "Go through the nnbabyl mbox and make sure that no article numbers are reused."
 626   (interactive)
 627   (let ((idents (make-vector 1000 0))
 628         id)
 629     (save-excursion
 630       (when (or (not nnbabyl-mbox-buffer)
 631                 (not (buffer-name nnbabyl-mbox-buffer)))
 632         (nnbabyl-read-mbox))
 633       (set-buffer nnbabyl-mbox-buffer)
 634       (goto-char (point-min))
 635       (while (re-search-forward "^X-Gnus-Newsgroup: \\([^ ]+\\) "  nil t)
 636         (if (intern-soft (setq id (match-string 1)) idents)
 637             (progn
 638               (delete-region (point-at-bol) (progn (forward-line 1) (point)))
 639               (nnheader-message 7 "Moving %s..." id)
 640               (nnbabyl-save-mail
 641                (nnmail-article-group 'nnbabyl-active-number)))
 642           (intern id idents)))
 643       (when (buffer-modified-p (current-buffer))
 644         (save-buffer))
 645       (nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
 646       (nnheader-message 5 ""))))
 647
 648 (provide 'nnbabyl)
 649
 650 ;;; nnbabyl.el ends here