lisp/gnus/nnfolder.el

   1 ;;; nnfolder.el --- mail folder access for Gnus
   2
   3 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
   5
   6 ;; Author: Simon Josefsson <simon@josefsson.org> (adding MARKS)
   7 ;;      ShengHuo Zhu <zsh@cs.rochester.edu> (adding NOV)
   8 ;;      Scott Byer <byer@mv.us.adobe.com>
   9 ;;      Lars Magne Ingebrigtsen <larsi@gnus.org>
  10 ;;      Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
  11 ;; Keywords: mail
  12
  13 ;; This file is part of GNU Emacs.
  14
  15 ;; GNU Emacs is free software: you can redistribute it and/or modify
  16 ;; it under the terms of the GNU General Public License as published by
  17 ;; the Free Software Foundation, either version 3 of the License, or
  18 ;; (at your option) any later version.
  19
  20 ;; GNU Emacs is distributed in the hope that it will be useful,
  21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 ;; GNU General Public License for more details.
  24
  25 ;; You should have received a copy of the GNU General Public License
  26 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  27
  28 ;;; Commentary:
  29
  30 ;;; Code:
  31
  32 ;; For Emacs < 22.2.
  33 (eval-and-compile
  34   (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
  35
  36 (require 'nnheader)
  37 (require 'message)
  38 (require 'nnmail)
  39 (require 'nnoo)
  40 (eval-when-compile (require 'cl))
  41 (require 'gnus)
  42 (require 'gnus-util)
  43 (require 'gnus-range)
  44
  45 ;; FIXME not explicitly used in this file.
  46 (autoload 'gnus-article-unpropagatable-p "gnus-sum")
  47
  48 (nnoo-declare nnfolder)
  49
  50 (defvoo nnfolder-directory (expand-file-name message-directory)
  51   "The name of the nnfolder directory.")
  52
  53 (defvoo nnfolder-nov-directory nil
  54   "The name of the nnfolder NOV directory.
  55 If nil, `nnfolder-directory' is used.")
  56
  57 (defvoo nnfolder-marks-directory nil
  58   "The name of the nnfolder MARKS directory.
  59 If nil, `nnfolder-directory' is used.")
  60
  61 (defvoo nnfolder-active-file
  62     (nnheader-concat nnfolder-directory "active")
  63   "The name of the active file.")
  64
  65 ;; I renamed this variable to something more in keeping with the general GNU
  66 ;; style. -SLB
  67
  68 (defvoo nnfolder-ignore-active-file nil
  69   "If non-nil, the active file is ignored.
  70 This causes nnfolder to do some extra work in order to determine the
  71 true active ranges of an mbox file.  Note that the active file is
  72 still saved, but its values are not used.  This costs some extra time
  73 when scanning an mbox when opening it.")
  74
  75 (defvoo nnfolder-distrust-mbox nil
  76   "If non-nil, the folder will be distrusted.
  77 This means that nnfolder will not trust the user with respect to
  78 inserting unaccounted for mail in the middle of an mbox file.  This
  79 can greatly slow down scans, which now must scan the entire file for
  80 unmarked messages.  When nil, scans occur forward from the last marked
  81 message, a huge time saver for large mailboxes.")
  82
  83 (defvoo nnfolder-newsgroups-file
  84     (concat (file-name-as-directory nnfolder-directory) "newsgroups")
  85   "Mail newsgroups description file.")
  86
  87 (defvoo nnfolder-get-new-mail t
  88   "If non-nil, nnfolder will check the incoming mail file and split the mail.")
  89
  90 (defvoo nnfolder-prepare-save-mail-hook nil
  91   "Hook run narrowed to an article before saving.")
  92
  93 (defvoo nnfolder-save-buffer-hook nil
  94   "Hook run before saving the nnfolder mbox buffer.")
  95
  96
  97 (defvoo nnfolder-inhibit-expiry nil
  98   "If non-nil, inhibit expiry.")
  99
 100 \f
 101
 102 (defconst nnfolder-version "nnfolder 2.0"
 103   "nnfolder version.")
 104
 105 (defconst nnfolder-article-marker "X-Gnus-Article-Number: "
 106   "String used to demarcate what the article number for a message is.")
 107
 108 (defvoo nnfolder-current-group nil)
 109 (defvoo nnfolder-current-buffer nil)
 110 (defvoo nnfolder-status-string "")
 111 (defvoo nnfolder-group-alist nil)
 112 (defvoo nnfolder-buffer-alist nil)
 113 (defvoo nnfolder-scantime-alist nil)
 114 (defvoo nnfolder-active-timestamp nil)
 115 (defvoo nnfolder-active-file-coding-system mm-text-coding-system)
 116 (defvoo nnfolder-active-file-coding-system-for-write
 117     nnmail-active-file-coding-system)
 118 (defvoo nnfolder-file-coding-system mm-text-coding-system)
 119 (defvoo nnfolder-file-coding-system-for-write nnheader-file-coding-system
 120   "Coding system for save nnfolder file.
 121 if nil, `nnfolder-file-coding-system' is used.") ; FIXME: fill-in the doc-string of this variable
 122
 123 (defvoo nnfolder-nov-is-evil nil
 124   "If non-nil, Gnus will never generate and use nov databases for mail groups.
 125 Using nov databases will speed up header fetching considerably.
 126 This variable shouldn't be flipped much.  If you have, for some reason,
 127 set this to t, and want to set it to nil again, you should always run
 128 the `nnfolder-generate-active-file' command.  The function will go
 129 through all nnfolder directories and generate nov databases for them
 130 all.  This may very well take some time.")
 131
 132 (defvoo nnfolder-nov-file-suffix ".nov")
 133
 134 (defvoo nnfolder-nov-buffer-alist nil)
 135
 136 (defvar nnfolder-nov-buffer-file-name nil)
 137
 138 (defvoo nnfolder-marks-is-evil nil
 139   "If non-nil, Gnus will never generate and use marks file for mail groups.
 140 Using marks files makes it possible to backup and restore mail groups
 141 separately from `.newsrc.eld'.  If you have, for some reason, set
 142 this to t, and want to set it to nil again, you should always remove
 143 the corresponding marks file (usually base nnfolder file name
 144 concatenated with `.mrk', but see `nnfolder-marks-file-suffix') for
 145 the group.  Then the marks file will be regenerated properly by Gnus.")
 146
 147 (defvoo nnfolder-marks nil)
 148
 149 (defvoo nnfolder-marks-file-suffix ".mrk")
 150
 151 (defvar nnfolder-marks-modtime (gnus-make-hashtable))
 152
 153 \f
 154
 155 ;;; Interface functions
 156
 157 (nnoo-define-basics nnfolder)
 158
 159 (deffoo nnfolder-retrieve-headers (articles &optional group server fetch-old)
 160   (save-excursion
 161     (set-buffer nntp-server-buffer)
 162     (erase-buffer)
 163     (let (article start stop num)
 164       (nnfolder-possibly-change-group group server)
 165       (when nnfolder-current-buffer
 166         (set-buffer nnfolder-current-buffer)
 167         (goto-char (point-min))
 168         (if (stringp (car articles))
 169             'headers
 170           (if (nnfolder-retrieve-headers-with-nov articles fetch-old)
 171               'nov
 172             (setq articles (gnus-sorted-intersection
 173                             ;; Is ARTICLES sorted?
 174                             (sort articles '<)
 175                             (nnfolder-existing-articles)))
 176             (while (setq article (pop articles))
 177               (set-buffer nnfolder-current-buffer)
 178               (cond ((nnfolder-goto-article article)
 179                      (setq start (point))
 180                      (setq stop (if (search-forward "\n\n" nil t)
 181                                     (1- (point))
 182                                   (point-max)))
 183                      (set-buffer nntp-server-buffer)
 184                      (insert (format "221 %d Article retrieved.\n" article))
 185                      (insert-buffer-substring nnfolder-current-buffer
 186                                               start stop)
 187                      (goto-char (point-max))
 188                      (insert ".\n"))
 189
 190                     ;; If we couldn't find this article, skip over ranges
 191                     ;; of missing articles so we don't search the whole file
 192                     ;; for each of them.
 193                     ((numberp article)
 194                      (setq start (point))
 195                      (and
 196                       ;; Check that we are either at BOF or after an
 197                       ;; article with a lower number.  We do this so we
 198                       ;; won't be confused by out-of-order article numbers,
 199                       ;; as caused by active file bogosity.
 200                       (cond
 201                        ((bobp))
 202                        ((search-backward (concat "\n" nnfolder-article-marker)
 203                                          nil t)
 204                         (goto-char (match-end 0))
 205                         (setq num (string-to-number
 206                                    (buffer-substring
 207                                     (point) (point-at-eol))))
 208                         (goto-char start)
 209                         (< num article)))
 210                       ;; Check that we are before an article with a
 211                       ;; higher number.
 212                       (search-forward (concat "\n" nnfolder-article-marker)
 213                                       nil t)
 214                       (progn
 215                         (setq num (string-to-number
 216                                    (buffer-substring
 217                                     (point) (point-at-eol))))
 218                         (> num article))
 219                       ;; Discard any article numbers before the one we're
 220                       ;; now looking at.
 221                       (while (and articles
 222                                   (< (car articles) num))
 223                         (setq articles (cdr articles))))
 224                      (goto-char start))))
 225             (set-buffer nntp-server-buffer)
 226             (nnheader-fold-continuation-lines)
 227             'headers))))))
 228
 229 (deffoo nnfolder-open-server (server &optional defs)
 230   (nnoo-change-server 'nnfolder server defs)
 231   (nnmail-activate 'nnfolder t)
 232   (gnus-make-directory nnfolder-directory)
 233   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 234     (and nnfolder-nov-directory
 235          (gnus-make-directory nnfolder-nov-directory)))
 236   (unless nnfolder-marks-is-evil
 237     (and nnfolder-marks-directory
 238          (gnus-make-directory nnfolder-marks-directory)))
 239   (cond
 240    ((not (file-exists-p nnfolder-directory))
 241     (nnfolder-close-server)
 242     (nnheader-report 'nnfolder "Couldn't create directory: %s"
 243                      nnfolder-directory))
 244    ((not (file-directory-p (file-truename nnfolder-directory)))
 245     (nnfolder-close-server)
 246     (nnheader-report 'nnfolder "Not a directory: %s" nnfolder-directory))
 247    (t
 248     (nnmail-activate 'nnfolder)
 249     (nnheader-report 'nnfolder "Opened server %s using directory %s"
 250                      server nnfolder-directory)
 251     t)))
 252
 253 (deffoo nnfolder-request-close ()
 254   (let ((alist nnfolder-buffer-alist))
 255     (while alist
 256       (nnfolder-close-group (caar alist) nil t)
 257       (setq alist (cdr alist))))
 258   (nnoo-close-server 'nnfolder)
 259   (setq nnfolder-buffer-alist nil
 260         nnfolder-group-alist nil))
 261
 262 (deffoo nnfolder-request-article (article &optional group server buffer)
 263   (nnfolder-possibly-change-group group server)
 264   (save-excursion
 265     (set-buffer nnfolder-current-buffer)
 266     (goto-char (point-min))
 267     (when (nnfolder-goto-article article)
 268       (let (start stop)
 269         (setq start (point))
 270         (forward-line 1)
 271         (unless (and (nnmail-search-unix-mail-delim)
 272                      (forward-line -1))
 273           (goto-char (point-max)))
 274         (setq stop (point))
 275         (let ((nntp-server-buffer (or buffer nntp-server-buffer)))
 276           (set-buffer nntp-server-buffer)
 277           (erase-buffer)
 278           (insert-buffer-substring nnfolder-current-buffer start stop)
 279           (goto-char (point-min))
 280           (while (looking-at "From ")
 281             (delete-char 5)
 282             (insert "X-From-Line: ")
 283             (forward-line 1))
 284           (if (numberp article)
 285               (cons nnfolder-current-group article)
 286             (goto-char (point-min))
 287             (cons nnfolder-current-group
 288                   (if (search-forward (concat "\n" nnfolder-article-marker)
 289                                       nil t)
 290                       (string-to-number (buffer-substring
 291                                       (point) (point-at-eol)))
 292                     -1))))))))
 293
 294 (deffoo nnfolder-request-group (group &optional server dont-check)
 295   (nnfolder-possibly-change-group group server t)
 296   (save-excursion
 297     (cond ((not (assoc group nnfolder-group-alist))
 298            (nnheader-report 'nnfolder "No such group: %s" group))
 299           ((file-directory-p (nnfolder-group-pathname group))
 300            (nnheader-report 'nnfolder "%s is a directory"
 301                             (file-name-as-directory
 302                              (let ((nnmail-pathname-coding-system nil))
 303                                (nnfolder-group-pathname group)))))
 304           (dont-check
 305            (nnheader-report 'nnfolder "Selected group %s" group)
 306            t)
 307           (t
 308            (let* ((active (assoc group nnfolder-group-alist))
 309                   (group (car active))
 310                   (range (cadr active)))
 311              (cond
 312               ((null active)
 313                (nnheader-report 'nnfolder "No such group: %s" group))
 314               ((null nnfolder-current-group)
 315                (nnheader-report 'nnfolder "Empty group: %s" group))
 316               (t
 317                (nnheader-report 'nnfolder "Selected group %s" group)
 318                (nnheader-insert "211 %d %d %d %s\n"
 319                                 (1+ (- (cdr range) (car range)))
 320                                 (car range) (cdr range) group))))))))
 321
 322 (deffoo nnfolder-request-scan (&optional group server)
 323   (nnfolder-possibly-change-group nil server)
 324   (when nnfolder-get-new-mail
 325     (nnfolder-possibly-change-group group server)
 326     (nnmail-get-new-mail
 327      'nnfolder
 328      (lambda ()
 329        (let ((bufs nnfolder-buffer-alist))
 330          (save-excursion
 331            (while bufs
 332              (if (not (gnus-buffer-live-p (nth 1 (car bufs))))
 333                  (setq nnfolder-buffer-alist
 334                        (delq (car bufs) nnfolder-buffer-alist))
 335                (set-buffer (nth 1 (car bufs)))
 336                (nnfolder-save-buffer)
 337                (kill-buffer (current-buffer)))
 338              (setq bufs (cdr bufs))))))
 339      nnfolder-directory
 340      group)))
 341
 342 ;; Don't close the buffer if we're not shutting down the server.  This way,
 343 ;; we can keep the buffer in the group buffer cache, and not have to grovel
 344 ;; over the buffer again unless we add new mail to it or modify it in some
 345 ;; way.
 346
 347 (deffoo nnfolder-close-group (group &optional server force)
 348   ;; Make sure we _had_ the group open.
 349   (when (or (assoc group nnfolder-buffer-alist)
 350             (equal group nnfolder-current-group))
 351     (let ((inf (assoc group nnfolder-buffer-alist)))
 352       (when inf
 353         (when (and nnfolder-current-group
 354                    nnfolder-current-buffer)
 355           (push (list nnfolder-current-group nnfolder-current-buffer)
 356                 nnfolder-buffer-alist))
 357         (setq nnfolder-buffer-alist
 358               (delq inf nnfolder-buffer-alist))
 359         (setq nnfolder-current-buffer (cadr inf)
 360               nnfolder-current-group (car inf))))
 361     (when (and nnfolder-current-buffer
 362                (buffer-name nnfolder-current-buffer))
 363       (save-excursion
 364         (set-buffer nnfolder-current-buffer)
 365         ;; If the buffer was modified, write the file out now.
 366         (nnfolder-save-buffer)
 367         ;; If we're shutting the server down, we need to kill the
 368         ;; buffer and remove it from the open buffer list.  Or, of
 369         ;; course, if we're trying to minimize our space impact.
 370         (kill-buffer (current-buffer))
 371         (setq nnfolder-buffer-alist (delq (assoc group nnfolder-buffer-alist)
 372                                           nnfolder-buffer-alist)))))
 373   (setq nnfolder-current-group nil
 374         nnfolder-current-buffer nil)
 375   t)
 376
 377 (deffoo nnfolder-request-create-group (group &optional server args)
 378   (nnfolder-possibly-change-group nil server)
 379   (nnmail-activate 'nnfolder)
 380   (cond ((zerop (length group))
 381          (nnheader-report 'nnfolder "Invalid (empty) group name"))
 382         ((file-directory-p (nnfolder-group-pathname group))
 383          (nnheader-report 'nnfolder "%s is a directory"
 384                           (file-name-as-directory
 385                            (let ((nnmail-pathname-coding-system nil))
 386                              (nnfolder-group-pathname group)))))
 387         ((assoc group nnfolder-group-alist)
 388          t)
 389         (t
 390          (push (list group (cons 1 0)) nnfolder-group-alist)
 391          (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 392          (save-current-buffer
 393            (nnfolder-read-folder group))
 394          t)))
 395
 396 (deffoo nnfolder-request-list (&optional server)
 397   (nnfolder-possibly-change-group nil server)
 398   (save-excursion
 399     (let ((nnmail-file-coding-system nnfolder-active-file-coding-system))
 400       (nnmail-find-file nnfolder-active-file)
 401       (setq nnfolder-group-alist (nnmail-get-active)))
 402     t))
 403
 404 (deffoo nnfolder-request-newgroups (date &optional server)
 405   (nnfolder-possibly-change-group nil server)
 406   (nnfolder-request-list server))
 407
 408 (deffoo nnfolder-request-list-newsgroups (&optional server)
 409   (nnfolder-possibly-change-group nil server)
 410   (save-excursion
 411     (let ((nnmail-file-coding-system nnfolder-file-coding-system))
 412       (nnmail-find-file nnfolder-newsgroups-file))))
 413
 414 ;; Return a list consisting of all article numbers existing in the
 415 ;; current folder.
 416
 417 (defun nnfolder-existing-articles ()
 418   (save-excursion
 419     (when nnfolder-current-buffer
 420       (set-buffer nnfolder-current-buffer)
 421       (goto-char (point-min))
 422       (let ((marker (concat "\n" nnfolder-article-marker))
 423             (number "[0-9]+")
 424             numbers)
 425         (while (and (search-forward marker nil t)
 426                     (re-search-forward number nil t))
 427           (let ((newnum (string-to-number (match-string 0))))
 428             (if (nnmail-within-headers-p)
 429                 (push newnum numbers))))
 430       ;; The article numbers are increasing, so this result is sorted.
 431         (nreverse numbers)))))
 432
 433 (autoload 'gnus-request-group "gnus-int")
 434 (declare-function gnus-request-create-group "gnus-int"
 435                   (group &optional gnus-command-method args))
 436
 437 (deffoo nnfolder-request-expire-articles (articles newsgroup
 438                                                    &optional server force)
 439   (nnfolder-possibly-change-group newsgroup server)
 440   (let ((is-old t)
 441         ;; The articles we have deleted so far.
 442         (deleted-articles nil)
 443         ;; The articles that really exist and will
 444         ;; be expired if they are old enough.
 445         (maybe-expirable
 446          (gnus-sorted-intersection articles (nnfolder-existing-articles)))
 447         target)
 448     (nnmail-activate 'nnfolder)
 449
 450     (save-excursion
 451       (set-buffer nnfolder-current-buffer)
 452       ;; Since messages are sorted in arrival order and expired in the
 453       ;; same order, we can stop as soon as we find a message that is
 454       ;; too old.
 455       (while (and maybe-expirable is-old)
 456         (goto-char (point-min))
 457         (when (and (nnfolder-goto-article (car maybe-expirable))
 458                    (search-forward (concat "\n" nnfolder-article-marker)
 459                                    nil t))
 460           (forward-sexp)
 461           (when (setq is-old
 462                       (nnmail-expired-article-p
 463                        newsgroup
 464                        (buffer-substring
 465                         (point) (progn (end-of-line) (point)))
 466                        force nnfolder-inhibit-expiry))
 467             (setq target nnmail-expiry-target)
 468             (unless (eq target 'delete)
 469               (with-temp-buffer
 470                 (nnfolder-request-article (car maybe-expirable)
 471                                           newsgroup server (current-buffer))
 472                 (let ((nnfolder-current-directory nil))
 473                   (when (functionp target)
 474                     (setq target (funcall target newsgroup)))
 475                   (when (and target (not (eq target 'delete)))
 476                     (if (or (gnus-request-group target)
 477                             (gnus-request-create-group target))
 478                         (nnmail-expiry-target-group target newsgroup)
 479                       (setq target nil)))))
 480               (nnfolder-possibly-change-group newsgroup server))
 481             (when target
 482               (nnheader-message 5 "Deleting article %d in %s..."
 483                                 (car maybe-expirable) newsgroup)
 484               (nnfolder-delete-mail)
 485               (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 486                 (nnfolder-nov-delete-article newsgroup (car maybe-expirable)))
 487               ;; Must remember which articles were actually deleted
 488               (push (car maybe-expirable) deleted-articles))))
 489         (setq maybe-expirable (cdr maybe-expirable)))
 490       (unless nnfolder-inhibit-expiry
 491         (nnheader-message 5 "Deleting articles...done"))
 492       (nnfolder-save-buffer)
 493       (nnfolder-adjust-min-active newsgroup)
 494       (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 495       (gnus-sorted-difference articles (nreverse deleted-articles)))))
 496
 497 (deffoo nnfolder-request-move-article (article group server accept-form
 498                                                &optional last move-is-internal)
 499   (save-excursion
 500     (let ((buf (get-buffer-create " *nnfolder move*"))
 501           result)
 502       (and
 503        (nnfolder-request-article article group server)
 504        (save-excursion
 505          (set-buffer buf)
 506          (erase-buffer)
 507          (insert-buffer-substring nntp-server-buffer)
 508          (goto-char (point-min))
 509          (while (re-search-forward
 510                  (concat "^" nnfolder-article-marker)
 511                  (save-excursion (and (search-forward "\n\n" nil t) (point)))
 512                  t)
 513            (gnus-delete-line))
 514          (setq result (eval accept-form))
 515          (kill-buffer buf)
 516          result)
 517        (save-excursion
 518          (nnfolder-possibly-change-group group server)
 519          (set-buffer nnfolder-current-buffer)
 520          (goto-char (point-min))
 521          (when (nnfolder-goto-article article)
 522            (nnfolder-delete-mail))
 523          (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 524            (nnfolder-nov-delete-article group article))
 525          (when last
 526            (nnfolder-save-buffer)
 527            (nnfolder-adjust-min-active group)
 528            (nnfolder-save-active nnfolder-group-alist nnfolder-active-file))))
 529       result)))
 530
 531 (deffoo nnfolder-request-accept-article (group &optional server last)
 532   (save-excursion
 533     (nnfolder-possibly-change-group group server)
 534     (nnmail-check-syntax)
 535     (let ((buf (current-buffer))
 536           result art-group)
 537       (goto-char (point-min))
 538       (when (looking-at "X-From-Line: ")
 539         (replace-match "From ")
 540         (while (progn (forward-line) (looking-at "[ \t]"))
 541           (delete-char -1)))
 542       (with-temp-buffer
 543         (let ((nnmail-file-coding-system nnfolder-active-file-coding-system)
 544               (nntp-server-buffer (current-buffer)))
 545           (nnmail-find-file nnfolder-active-file)
 546           (setq nnfolder-group-alist (nnmail-parse-active))))
 547       (save-excursion
 548         (goto-char (point-min))
 549         (if (search-forward "\n\n" nil t)
 550             (forward-line -1)
 551           (goto-char (point-max)))
 552         (while (re-search-backward (concat "^" nnfolder-article-marker) nil t)
 553           (delete-region (point) (progn (forward-line 1) (point))))
 554         (when nnmail-cache-accepted-message-ids
 555           (nnmail-cache-insert (nnmail-fetch-field "message-id")
 556                                group
 557                                (nnmail-fetch-field "subject")
 558                                (nnmail-fetch-field "from")))
 559         (setq result (if (stringp group)
 560                          (list (cons group (nnfolder-active-number group)))
 561                        (setq art-group
 562                              (nnmail-article-group 'nnfolder-active-number))))
 563         (if (and (null result)
 564                  (yes-or-no-p "Moved to `junk' group; delete article? "))
 565             (setq result 'junk)
 566           (setq result
 567                 (car (nnfolder-save-mail result)))))
 568       (when last
 569         (save-excursion
 570           (nnfolder-possibly-change-folder (or (caar art-group) group))
 571           (nnfolder-save-buffer)
 572           (when nnmail-cache-accepted-message-ids
 573             (nnmail-cache-close))))
 574       (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 575       (unless result
 576         (nnheader-report 'nnfolder "Couldn't store article"))
 577       result)))
 578
 579 (deffoo nnfolder-request-replace-article (article group buffer)
 580   (nnfolder-possibly-change-group group)
 581   (save-excursion
 582     (set-buffer buffer)
 583     (goto-char (point-min))
 584     (if (not (looking-at "X-From-Line: "))
 585         (insert "From nobody " (current-time-string) "\n")
 586       (replace-match "From ")
 587       (forward-line 1)
 588       (while (looking-at "[ \t]")
 589         (delete-char -1)
 590         (forward-line 1)))
 591     (nnfolder-normalize-buffer)
 592     (set-buffer nnfolder-current-buffer)
 593     (goto-char (point-min))
 594     (if (not (nnfolder-goto-article article))
 595         nil
 596       (nnfolder-delete-mail)
 597       (insert-buffer-substring buffer)
 598       (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 599         (save-excursion
 600           (set-buffer buffer)
 601           (let ((headers (nnfolder-parse-head article
 602                                               (point-min) (point-max))))
 603             (with-current-buffer (nnfolder-open-nov group)
 604               (if (nnheader-find-nov-line article)
 605                   (delete-region (point) (progn (forward-line 1) (point))))
 606               (nnheader-insert-nov headers)))))
 607       (nnfolder-save-buffer)
 608       t)))
 609
 610 (deffoo nnfolder-request-delete-group (group &optional force server)
 611   (nnfolder-close-group group server t)
 612   ;; Delete all articles in GROUP.
 613   (if (not force)
 614       ()                                ; Don't delete the articles.
 615     ;; Delete the file that holds the group.
 616     (let ((data (nnfolder-group-pathname group))
 617           (nov (nnfolder-group-nov-pathname group))
 618           (mrk (nnfolder-group-marks-pathname group)))
 619       (ignore-errors (delete-file data))
 620       (ignore-errors (delete-file nov))
 621       (ignore-errors (delete-file mrk))))
 622   ;; Remove the group from all structures.
 623   (setq nnfolder-group-alist
 624         (delq (assoc group nnfolder-group-alist) nnfolder-group-alist)
 625         nnfolder-current-group nil
 626         nnfolder-current-buffer nil)
 627   ;; Save the active file.
 628   (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 629   t)
 630
 631 (deffoo nnfolder-request-rename-group (group new-name &optional server)
 632   (nnfolder-possibly-change-group group server)
 633   (save-excursion
 634     (set-buffer nnfolder-current-buffer)
 635     (and (file-writable-p buffer-file-name)
 636          (ignore-errors
 637            (let ((new-file (nnfolder-group-pathname new-name)))
 638              (gnus-make-directory (file-name-directory new-file))
 639              (rename-file buffer-file-name new-file)
 640              (when (file-exists-p (nnfolder-group-nov-pathname group))
 641                (setq new-file (nnfolder-group-nov-pathname new-name))
 642                (gnus-make-directory (file-name-directory new-file))
 643                (rename-file (nnfolder-group-nov-pathname group) new-file))
 644              (when (file-exists-p (nnfolder-group-marks-pathname group))
 645                (setq new-file (nnfolder-group-marks-pathname new-name))
 646                (gnus-make-directory (file-name-directory new-file))
 647                (rename-file (nnfolder-group-marks-pathname group) new-file)))
 648            t)
 649          ;; That went ok, so we change the internal structures.
 650          (let ((entry (assoc group nnfolder-group-alist)))
 651            (and entry (setcar entry new-name))
 652            (setq nnfolder-current-buffer nil
 653                  nnfolder-current-group nil)
 654            ;; Save the new group alist.
 655            (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
 656            ;; We kill the buffer instead of renaming it and stuff.
 657            (kill-buffer (current-buffer))
 658            t))))
 659
 660 (deffoo nnfolder-request-regenerate (server)
 661   (nnfolder-possibly-change-group nil server)
 662   (nnfolder-generate-active-file)
 663   t)
 664
 665 \f
 666 ;;; Internal functions.
 667
 668 (defun nnfolder-adjust-min-active (group)
 669   ;; Find the lowest active article in this group.
 670   (let* ((active (cadr (assoc group nnfolder-group-alist)))
 671          (marker (concat "\n" nnfolder-article-marker))
 672          (number "[0-9]+")
 673          (activemin (cdr active)))
 674     (save-excursion
 675       (set-buffer nnfolder-current-buffer)
 676       (goto-char (point-min))
 677       (while (and (search-forward marker nil t)
 678                   (re-search-forward number nil t))
 679         (let ((newnum (string-to-number (match-string 0))))
 680           (if (nnmail-within-headers-p)
 681               (setq activemin (min activemin newnum)))))
 682       (setcar active activemin))))
 683
 684 (defun nnfolder-article-string (article)
 685   (if (numberp article)
 686       (concat "\n" nnfolder-article-marker (int-to-string article) " ")
 687     (concat "\nMessage-ID: " article)))
 688
 689 (defun nnfolder-goto-article (article)
 690   "Place point at the start of the headers of ARTICLE.
 691 ARTICLE can be an article number or a Message-ID.
 692 Returns t if successful, nil otherwise."
 693   (let ((art-string (nnfolder-article-string article))
 694         start found)
 695     ;; It is likely that we are at or before the delimiter line.
 696     ;; We therefore go to the end of the previous line, and start
 697     ;; searching from there.
 698     (beginning-of-line)
 699     (unless (bobp)
 700       (forward-char -1))
 701     (setq start (point))
 702     ;; First search forward.
 703     (while (and (setq found (search-forward art-string nil t))
 704                 (not (nnmail-within-headers-p))))
 705     ;; If unsuccessful, search backward from where we started,
 706     (unless found
 707       (goto-char start)
 708       (while (and (setq found (search-backward art-string nil t))
 709                   (not (nnmail-within-headers-p)))))
 710     (when found
 711       (nnmail-search-unix-mail-delim-backward))))
 712
 713 (defun nnfolder-delete-mail (&optional leave-delim)
 714   "Delete the message that point is in.
 715 If optional argument LEAVE-DELIM is t, then mailbox delimiter is not
 716 deleted.  Point is left where the deleted region was."
 717   (save-restriction
 718     (narrow-to-region
 719      (save-excursion
 720        ;; In case point is at the beginning of the message already.
 721        (forward-line 1)
 722        (nnmail-search-unix-mail-delim-backward)
 723        (if leave-delim (progn (forward-line 1) (point))
 724          (point)))
 725      (progn
 726        (forward-line 1)
 727        (if (nnmail-search-unix-mail-delim)
 728            (point)
 729          (point-max))))
 730     (run-hooks 'nnfolder-delete-mail-hook)
 731     (delete-region (point-min) (point-max))))
 732
 733 (defun nnfolder-possibly-change-group (group &optional server dont-check)
 734   ;; Change servers.
 735   (when (and server
 736              (not (nnfolder-server-opened server)))
 737     (nnfolder-open-server server))
 738   (unless (gnus-buffer-live-p nnfolder-current-buffer)
 739     (setq nnfolder-current-buffer nil
 740           nnfolder-current-group nil))
 741   ;; Change group.
 742   (let ((file-name-coding-system nnmail-pathname-coding-system))
 743     (when (and group
 744                (not (equal group nnfolder-current-group))
 745                (progn
 746                  (nnmail-activate 'nnfolder)
 747                  (and (assoc group nnfolder-group-alist)
 748                       (file-exists-p (nnfolder-group-pathname group)))))
 749       (if dont-check
 750           (setq nnfolder-current-group group
 751                 nnfolder-current-buffer nil)
 752         (let (inf file)
 753           ;; If we have to change groups, see if we don't already have
 754           ;; the folder in memory.  If we do, verify the modtime and
 755           ;; destroy the folder if needed so we can rescan it.
 756           (setq nnfolder-current-buffer
 757                 (nth 1 (assoc group nnfolder-buffer-alist)))
 758
 759           ;; If the buffer is not live, make sure it isn't in the
 760           ;; alist.  If it is live, verify that nobody else has
 761           ;; touched the file since last time.
 762           (when (and nnfolder-current-buffer
 763                      (not (gnus-buffer-live-p nnfolder-current-buffer)))
 764             (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)
 765                   nnfolder-current-buffer nil))
 766
 767           (setq nnfolder-current-group group)
 768
 769           (when (or (not nnfolder-current-buffer)
 770                     (not (verify-visited-file-modtime
 771                           nnfolder-current-buffer)))
 772             (save-excursion
 773               (setq file (nnfolder-group-pathname group))
 774               ;; See whether we need to create the new file.
 775               (unless (file-exists-p file)
 776                 (gnus-make-directory (file-name-directory file))
 777                 (let ((nnmail-file-coding-system
 778                        (or nnfolder-file-coding-system-for-write
 779                            nnfolder-file-coding-system-for-write)))
 780                   (nnmail-write-region (point-min) (point-min)
 781                                        file t 'nomesg)))
 782               (when (setq nnfolder-current-buffer (nnfolder-read-folder group))
 783                 (set-buffer nnfolder-current-buffer)
 784                 (push (list group nnfolder-current-buffer)
 785                       nnfolder-buffer-alist)))))))))
 786
 787 (defun nnfolder-save-mail (group-art-list)
 788   "Called narrowed to an article."
 789   (let* (save-list group-art)
 790     (goto-char (point-min))
 791     ;; The From line may have been quoted by movemail.
 792     (when (looking-at ">From")
 793       (delete-char 1))
 794     ;; This might come from somewhere else.
 795     (unless (looking-at "From ")
 796       (insert "From nobody " (current-time-string) "\n")
 797       (goto-char (point-min)))
 798     ;; Quote all "From " lines in the article.
 799     (forward-line 1)
 800     (let (case-fold-search)
 801       (while (re-search-forward "^From " nil t)
 802         (beginning-of-line)
 803         (insert "> ")))
 804     (setq save-list group-art-list)
 805     (nnmail-insert-lines)
 806     (nnmail-insert-xref group-art-list)
 807     (run-hooks 'nnmail-prepare-save-mail-hook)
 808     (run-hooks 'nnfolder-prepare-save-mail-hook)
 809
 810     ;; Insert the mail into each of the destination groups.
 811     (while (setq group-art (pop group-art-list))
 812       ;; Kill any previous newsgroup markers.
 813       (goto-char (point-min))
 814       (if (search-forward "\n\n" nil t)
 815           (forward-line -1)
 816         (goto-char (point-max)))
 817       (while (search-backward (concat "\n" nnfolder-article-marker) nil t)
 818         (delete-region (1+ (point)) (progn (forward-line 2) (point))))
 819
 820       ;; Insert the new newsgroup marker.
 821       (nnfolder-insert-newsgroup-line group-art)
 822
 823       (save-excursion
 824         (let ((beg (point-min))
 825               (end (point-max))
 826               (obuf (current-buffer)))
 827           (nnfolder-possibly-change-folder (car group-art))
 828           (let ((buffer-read-only nil))
 829             (nnfolder-normalize-buffer)
 830             (insert-buffer-substring obuf beg end))
 831           (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
 832             (set-buffer obuf)
 833             (nnfolder-add-nov (car group-art) (cdr group-art)
 834                               (nnfolder-parse-head nil beg end))))))
 835
 836     ;; Did we save it anywhere?
 837     save-list))
 838
 839 (defun nnfolder-normalize-buffer ()
 840   "Make sure there are two newlines at the end of the buffer."
 841   (goto-char (point-max))
 842   (skip-chars-backward "\n")
 843   (delete-region (point) (point-max))
 844   (unless (bobp)
 845     (insert "\n\n")))
 846
 847 (defun nnfolder-insert-newsgroup-line (group-art)
 848   (save-excursion
 849     (goto-char (point-min))
 850     (unless (search-forward "\n\n" nil t)
 851       (goto-char (point-max))
 852       (insert "\n"))
 853     (forward-char -1)
 854     (insert (format (concat nnfolder-article-marker "%d   %s\n")
 855                     (cdr group-art) (message-make-date)))))
 856
 857 (defun nnfolder-active-number (group)
 858   ;; Find the next article number in GROUP.
 859   (let ((active (cadr (assoc group nnfolder-group-alist))))
 860     (if active
 861         (setcdr active (1+ (cdr active)))
 862       ;; This group is new, so we create a new entry for it.
 863       ;; This might be a bit naughty... creating groups on the drop of
 864       ;; a hat, but I don't know...
 865       (push (list group (setq active (cons 1 1)))
 866             nnfolder-group-alist))
 867     (cdr active)))
 868
 869 (defun nnfolder-possibly-change-folder (group)
 870   (let ((inf (assoc group nnfolder-buffer-alist)))
 871     (if (and inf
 872              (gnus-buffer-live-p (cadr inf)))
 873         (set-buffer (cadr inf))
 874       (when inf
 875         (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist)))
 876       (when nnfolder-group-alist
 877         (nnfolder-save-active nnfolder-group-alist nnfolder-active-file))
 878       (push (list group (nnfolder-read-folder group))
 879             nnfolder-buffer-alist))))
 880
 881 ;; This method has a problem if you've accidentally let the active
 882 ;; list get out of sync with the files.  This could happen, say, if
 883 ;; you've accidentally gotten new mail with something other than Gnus
 884 ;; (but why would _that_ ever happen? :-).  In that case, we will be
 885 ;; in the middle of processing the file, ready to add new X-Gnus
 886 ;; article number markers, and we'll run across a message with no ID
 887 ;; yet - the active list _may_not_ be ready for us yet.
 888
 889 ;; To handle this, I'm modifying this routine to maintain the maximum
 890 ;; ID seen so far, and when we hit a message with no ID, we will
 891 ;; _manually_ scan the rest of the message looking for any more,
 892 ;; possibly higher IDs.  We'll assume the maximum that we find is the
 893 ;; highest active.  Note that this shouldn't cost us much extra time
 894 ;; at all, but will be a lot less vulnerable to glitches between the
 895 ;; mbox and the active file.
 896
 897 (defun nnfolder-read-folder (group)
 898   (let* ((file (nnfolder-group-pathname group))
 899          (nov  (nnfolder-group-nov-pathname group))
 900          (buffer (set-buffer
 901                   (let ((nnheader-file-coding-system
 902                          nnfolder-file-coding-system))
 903                     (nnheader-find-file-noselect file t)))))
 904     (mm-enable-multibyte) ;; Use multibyte buffer for future copying.
 905     (buffer-disable-undo)
 906     (if (equal (cadr (assoc group nnfolder-scantime-alist))
 907                (nth 5 (file-attributes file)))
 908         ;; This looks up-to-date, so we don't do any scanning.
 909         (if (file-exists-p file)
 910             buffer
 911           (push (list group buffer) nnfolder-buffer-alist)
 912           (set-buffer-modified-p t)
 913           (nnfolder-save-buffer))
 914       ;; Parse the damn thing.
 915       (save-excursion
 916         (goto-char (point-min))
 917         ;; Remove any blank lines at the start.
 918         (while (eq (following-char) ?\n)
 919           (delete-char 1))
 920         (nnmail-activate 'nnfolder)
 921         ;; Read in the file.
 922         (let ((delim "^From ")
 923               (marker (concat "\n" nnfolder-article-marker))
 924               (number "[0-9]+")
 925               (active (or (cadr (assoc group nnfolder-group-alist))
 926                           (cons 1 0)))
 927               (scantime (assoc group nnfolder-scantime-alist))
 928               (minid (or (and (boundp 'most-positive-fixnum)
 929                               most-positive-fixnum)
 930                          (lsh -1 -1)))
 931               maxid start end newscantime
 932               novbuf articles newnum
 933               buffer-read-only)
 934           (setq maxid (cdr active))
 935
 936           (unless (or gnus-nov-is-evil nnfolder-nov-is-evil
 937                       (and (file-exists-p nov)
 938                            (file-newer-than-file-p nov file)))
 939             (unless (file-exists-p nov)
 940               (gnus-make-directory (file-name-directory nov)))
 941             (with-current-buffer
 942                 (setq novbuf (nnfolder-open-nov group))
 943               (goto-char (point-min))
 944               (while (not (eobp))
 945                 (push (read novbuf) articles)
 946                 (forward-line 1))
 947               (setq articles (nreverse articles))))
 948           (goto-char (point-min))
 949
 950           ;; Anytime the active number is 1 or 0, it is suspect.  In
 951           ;; that case, search the file manually to find the active
 952           ;; number.  Or, of course, if we're being paranoid.  (This
 953           ;; would also be the place to build other lists from the
 954           ;; header markers, such as expunge lists, etc., if we ever
 955           ;; desired to abandon the active file entirely for mboxes.)
 956           (when (or nnfolder-ignore-active-file
 957                     novbuf
 958                     (< maxid 2))
 959             (while (and (search-forward marker nil t)
 960                         (looking-at number))
 961               (setq newnum (string-to-number (match-string 0)))
 962               (when (nnmail-within-headers-p)
 963                 (setq maxid (max maxid newnum)
 964                       minid (min minid newnum))
 965                 (when novbuf
 966                   (if (memq newnum articles)
 967                       (setq articles (delq newnum articles))
 968                     (let ((headers (nnfolder-parse-head newnum)))
 969                       (with-current-buffer novbuf
 970                         (nnheader-find-nov-line newnum)
 971                         (nnheader-insert-nov headers)))))))
 972             (when (and novbuf articles)
 973               (with-current-buffer novbuf
 974                 (dolist (article articles)
 975                   (when (nnheader-find-nov-line article)
 976                     (delete-region (point)
 977                                    (progn (forward-line 1) (point)))))))
 978             (setcar active (max 1 (min minid maxid)))
 979             (setcdr active (max maxid (cdr active)))
 980             (goto-char (point-min)))
 981
 982           ;; As long as we trust that the user will only insert
 983           ;; unmarked mail at the end, go to the end and search
 984           ;; backwards for the last marker.  Find the start of that
 985           ;; message, and begin to search for unmarked messages from
 986           ;; there.
 987           (when (not (or nnfolder-distrust-mbox
 988                          (< maxid 2)))
 989             (goto-char (point-max))
 990             (unless (re-search-backward marker nil t)
 991               (goto-char (point-min)))
 992             ;;(when (nnmail-search-unix-mail-delim)
 993             ;;  (goto-char (point-min)))
 994             )
 995
 996           ;; Keep track of the active number on our own, and insert it
 997           ;; back into the active list when we're done.  Also, prime
 998           ;; the pump to cut down on the number of searches we do.
 999           (unless (nnmail-search-unix-mail-delim)
1000             (goto-char (point-max)))
1001           (setq end (point-marker))
1002           (while (not (= end (point-max)))
1003             (setq start (marker-position end))
1004             (goto-char end)
1005            ;; There may be more than one "From " line, so we skip past
1006             ;; them.
1007             (while (looking-at delim)
1008               (forward-line 1))
1009             (set-marker end (if (nnmail-search-unix-mail-delim)
1010                                 (point)
1011                               (point-max)))
1012             (goto-char start)
1013             (when (not (search-forward marker end t))
1014               (narrow-to-region start end)
1015               (nnmail-insert-lines)
1016               (nnfolder-insert-newsgroup-line
1017                (cons nil
1018                      (setq newnum
1019                            (nnfolder-active-number group))))
1020               (when novbuf
1021                 (let ((headers (nnfolder-parse-head newnum (point-min)
1022                                                     (point-max))))
1023                   (with-current-buffer novbuf
1024                     (goto-char (point-max))
1025                     (nnheader-insert-nov headers))))
1026               (widen)))
1027
1028           (set-marker end nil)
1029           ;; Make absolutely sure that the active list reflects
1030           ;; reality!
1031           (nnfolder-save-active nnfolder-group-alist nnfolder-active-file)
1032
1033           ;; Set the scantime for this group.
1034           (setq newscantime (visited-file-modtime))
1035           (if scantime
1036               (setcdr scantime (list newscantime))
1037             (push (list group newscantime)
1038                   nnfolder-scantime-alist))
1039           ;; Save nov.
1040           (when novbuf
1041             (nnfolder-save-nov))
1042           (current-buffer))))))
1043
1044 ;;;###autoload
1045 (defun nnfolder-generate-active-file ()
1046   "Look for mbox folders in the nnfolder directory and make them into groups.
1047 This command does not work if you use short group names."
1048   (interactive)
1049   (nnmail-activate 'nnfolder)
1050   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
1051     (dolist (file (directory-files (or nnfolder-nov-directory
1052                                        nnfolder-directory)
1053                                    t
1054                                    (concat
1055                                     (regexp-quote nnfolder-nov-file-suffix)
1056                                     "$")))
1057       (when (not (message-mail-file-mbox-p file))
1058         (ignore-errors
1059           (delete-file file)))))
1060     (dolist (file (directory-files nnfolder-directory))
1061       (when (and (not (backup-file-name-p file))
1062                  (message-mail-file-mbox-p
1063                   (nnheader-concat nnfolder-directory file)))
1064         (let ((oldgroup (assoc file nnfolder-group-alist)))
1065           (if oldgroup
1066               (nnheader-message 5 "Refreshing group %s..." file)
1067             (nnheader-message 5 "Adding group %s..." file))
1068           (if oldgroup
1069               (setq nnfolder-group-alist
1070                     (delq oldgroup (copy-sequence nnfolder-group-alist))))
1071           (push (list file (cons 1 0)) nnfolder-group-alist)
1072           (nnfolder-possibly-change-folder file)
1073           (nnfolder-possibly-change-group file)
1074           (nnfolder-close-group file))))
1075     (nnheader-message 5 ""))
1076
1077 (defun nnfolder-group-pathname (group)
1078   "Make file name for GROUP."
1079   (setq group
1080         (mm-encode-coding-string group nnmail-pathname-coding-system))
1081   (let ((dir (file-name-as-directory (expand-file-name nnfolder-directory))))
1082     ;; If this file exists, we use it directly.
1083     (if (or nnmail-use-long-file-names
1084             (file-exists-p (concat dir group)))
1085         (concat dir group)
1086       ;; If not, we translate dots into slashes.
1087       (concat dir (nnheader-replace-chars-in-string group ?. ?/)))))
1088
1089 (defun nnfolder-group-nov-pathname (group)
1090   "Make pathname for GROUP NOV."
1091   (let ((nnfolder-directory
1092          (or nnfolder-nov-directory nnfolder-directory)))
1093     (concat (nnfolder-group-pathname group) nnfolder-nov-file-suffix)))
1094
1095 (defun nnfolder-save-buffer ()
1096   "Save the buffer."
1097   (when (buffer-modified-p)
1098     (run-hooks 'nnfolder-save-buffer-hook)
1099     (gnus-make-directory (file-name-directory (buffer-file-name)))
1100     (let ((coding-system-for-write
1101            (or nnfolder-file-coding-system-for-write
1102                nnfolder-file-coding-system))
1103           (copyright-update nil))
1104       (save-buffer)))
1105   (unless (or gnus-nov-is-evil nnfolder-nov-is-evil)
1106     (nnfolder-save-nov)))
1107
1108 (defun nnfolder-save-active (group-alist active-file)
1109   (let ((nnmail-active-file-coding-system
1110          (or nnfolder-active-file-coding-system-for-write
1111              nnfolder-active-file-coding-system)))
1112     (nnmail-save-active group-alist active-file)))
1113
1114 (defun nnfolder-open-nov (group)
1115   (or (cdr (assoc group nnfolder-nov-buffer-alist))
1116       (let ((buffer (get-buffer-create (format " *nnfolder overview %s*" group))))
1117         (save-excursion
1118           (set-buffer buffer)
1119           (set (make-local-variable 'nnfolder-nov-buffer-file-name)
1120                (nnfolder-group-nov-pathname group))
1121           (erase-buffer)
1122           (when (file-exists-p nnfolder-nov-buffer-file-name)
1123             (nnheader-insert-file-contents nnfolder-nov-buffer-file-name)))
1124         (push (cons group buffer) nnfolder-nov-buffer-alist)
1125         buffer)))
1126
1127 (defun nnfolder-save-nov ()
1128   (save-excursion
1129     (while nnfolder-nov-buffer-alist
1130       (when (buffer-name (cdar nnfolder-nov-buffer-alist))
1131         (set-buffer (cdar nnfolder-nov-buffer-alist))
1132         (when (buffer-modified-p)
1133           (gnus-make-directory (file-name-directory
1134                                 nnfolder-nov-buffer-file-name))
1135           (nnmail-write-region 1 (point-max) nnfolder-nov-buffer-file-name
1136                                nil 'nomesg))
1137         (set-buffer-modified-p nil)
1138         (kill-buffer (current-buffer)))
1139       (setq nnfolder-nov-buffer-alist (cdr nnfolder-nov-buffer-alist)))))
1140
1141 (defun nnfolder-nov-delete-article (group article)
1142   (save-excursion
1143     (set-buffer (nnfolder-open-nov group))
1144     (when (nnheader-find-nov-line article)
1145       (delete-region (point) (progn (forward-line 1) (point))))
1146     t))
1147
1148 (defun nnfolder-retrieve-headers-with-nov (articles &optional fetch-old)
1149   (if (or gnus-nov-is-evil nnfolder-nov-is-evil)
1150       nil
1151     (let ((nov (nnfolder-group-nov-pathname nnfolder-current-group)))
1152       (when (file-exists-p nov)
1153         (save-excursion
1154           (set-buffer nntp-server-buffer)
1155           (erase-buffer)
1156           (nnheader-insert-file-contents nov)
1157           (if (and fetch-old
1158                    (not (numberp fetch-old)))
1159               t                         ; Don't remove anything.
1160             (nnheader-nov-delete-outside-range
1161              (if fetch-old (max 1 (- (car articles) fetch-old))
1162                (car articles))
1163              (car (last articles)))
1164             t))))))
1165
1166 (defun nnfolder-parse-head (&optional number b e)
1167   "Parse the head of the current buffer."
1168   (let ((buf (current-buffer))
1169         chars)
1170     (save-excursion
1171       (unless b
1172         (setq b (if (nnmail-search-unix-mail-delim-backward)
1173                     (point) (point-min)))
1174         (forward-line 1)
1175         (setq e (if (nnmail-search-unix-mail-delim)
1176                     (point) (point-max))))
1177       (setq chars (- e b))
1178       (unless (zerop chars)
1179         (goto-char b)
1180         (if (search-forward "\n\n" e t) (setq e (1- (point)))))
1181       (with-temp-buffer
1182         (insert-buffer-substring buf b e)
1183         (let ((headers (nnheader-parse-naked-head)))
1184           (mail-header-set-chars headers chars)
1185           (mail-header-set-number headers number)
1186           headers)))))
1187
1188 (defun nnfolder-add-nov (group article headers)
1189   "Add a nov line for the GROUP base."
1190   (save-excursion
1191     (set-buffer (nnfolder-open-nov group))
1192     (goto-char (point-max))
1193     (mail-header-set-number headers article)
1194     (nnheader-insert-nov headers)))
1195
1196 (deffoo nnfolder-request-set-mark (group actions &optional server)
1197   (when (and server
1198              (not (nnfolder-server-opened server)))
1199     (nnfolder-open-server server))
1200   (unless nnfolder-marks-is-evil
1201     (nnfolder-open-marks group server)
1202     (dolist (action actions)
1203       (let ((range (nth 0 action))
1204             (what  (nth 1 action))
1205             (marks (nth 2 action)))
1206         (assert (or (eq what 'add) (eq what 'del)) nil
1207                 "Unknown request-set-mark action: %s" what)
1208         (dolist (mark marks)
1209           (setq nnfolder-marks (gnus-update-alist-soft
1210                             mark
1211                             (funcall (if (eq what 'add) 'gnus-range-add
1212                                        'gnus-remove-from-range)
1213                                      (cdr (assoc mark nnfolder-marks)) range)
1214                             nnfolder-marks)))))
1215     (nnfolder-save-marks group server))
1216   nil)
1217
1218 (deffoo nnfolder-request-update-info (group info &optional server)
1219   ;; Change servers.
1220   (when (and server
1221              (not (nnfolder-server-opened server)))
1222     (nnfolder-open-server server))
1223   (when (and (not nnfolder-marks-is-evil) (nnfolder-marks-changed-p group))
1224     (nnheader-message 8 "Updating marks for %s..." group)
1225     (nnfolder-open-marks group server)
1226     ;; Update info using `nnfolder-marks'.
1227     (mapc (lambda (pred)
1228             (unless (memq (cdr pred) gnus-article-unpropagated-mark-lists)
1229               (gnus-info-set-marks
1230                info
1231                (gnus-update-alist-soft
1232                 (cdr pred)
1233                 (cdr (assq (cdr pred) nnfolder-marks))
1234                 (gnus-info-marks info))
1235                t)))
1236           gnus-article-mark-lists)
1237     (let ((seen (cdr (assq 'read nnfolder-marks))))
1238       (gnus-info-set-read info
1239                           (if (and (integerp (car seen))
1240                                    (null (cdr seen)))
1241                               (list (cons (car seen) (car seen)))
1242                             seen)))
1243     (nnheader-message 8 "Updating marks for %s...done" group))
1244   info)
1245
1246 (defun nnfolder-group-marks-pathname (group)
1247   "Make pathname for GROUP NOV."
1248   (let ((nnfolder-directory (or nnfolder-marks-directory nnfolder-directory)))
1249     (concat (nnfolder-group-pathname group) nnfolder-marks-file-suffix)))
1250
1251 (defun nnfolder-marks-changed-p (group)
1252   (let ((file (nnfolder-group-marks-pathname group)))
1253     (if (null (gnus-gethash file nnfolder-marks-modtime))
1254         t ;; never looked at marks file, assume it has changed
1255       (not (equal (gnus-gethash file nnfolder-marks-modtime)
1256                   (nth 5 (file-attributes file)))))))
1257
1258 (defun nnfolder-save-marks (group server)
1259   (let ((file-name-coding-system nnmail-pathname-coding-system)
1260         (file (nnfolder-group-marks-pathname group)))
1261     (condition-case err
1262         (progn
1263           (with-temp-file file
1264             (erase-buffer)
1265             (gnus-prin1 nnfolder-marks)
1266             (insert "\n"))
1267           (gnus-sethash file
1268                         (nth 5 (file-attributes file))
1269                         nnfolder-marks-modtime))
1270       (error (or (gnus-yes-or-no-p
1271                   (format "Could not write to %s (%s).  Continue? " file err))
1272                  (error "Cannot write to %s (%s)" file err))))))
1273
1274 (defun nnfolder-open-marks (group server)
1275   (let ((file (nnfolder-group-marks-pathname group)))
1276     (if (file-exists-p file)
1277         (condition-case err
1278             (with-temp-buffer
1279               (gnus-sethash file (nth 5 (file-attributes file))
1280                             nnfolder-marks-modtime)
1281               (nnheader-insert-file-contents file)
1282               (setq nnfolder-marks (read (current-buffer)))
1283               (dolist (el gnus-article-unpropagated-mark-lists)
1284                 (setq nnfolder-marks (gnus-remassoc el nnfolder-marks))))
1285           (error (or (gnus-yes-or-no-p
1286                       (format "Error reading nnfolder marks file %s (%s).  Continuing will use marks from .newsrc.eld.  Continue? " file err))
1287                      (error "Cannot read nnfolder marks file %s (%s)" file err))))
1288       ;; User didn't have a .marks file.  Probably first time
1289       ;; user of the .marks stuff.  Bootstrap it from .newsrc.eld.
1290       (let ((info (gnus-get-info
1291                    (gnus-group-prefixed-name
1292                     group
1293                     (gnus-server-to-method (format "nnfolder:%s" server))))))
1294         (nnheader-message 7 "Bootstrapping marks for %s..." group)
1295         (setq nnfolder-marks (gnus-info-marks info))
1296         (push (cons 'read (gnus-info-read info)) nnfolder-marks)
1297         (dolist (el gnus-article-unpropagated-mark-lists)
1298           (setq nnfolder-marks (gnus-remassoc el nnfolder-marks)))
1299         (nnfolder-save-marks group server)
1300         (nnheader-message 7 "Bootstrapping marks for %s...done" group)))))
1301
1302 (provide 'nnfolder)
1303
1304 ;; arch-tag: a040d0f4-4f4e-445f-8972-839575c5f7e6
1305 ;;; nnfolder.el ends here