gnus-agent.el 55.6 KB
Newer Older
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1
;;; gnus-agent.el --- unplugged support for Gnus
2
;; Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:

;;; Code:

(require 'gnus)
(require 'gnus-cache)
(require 'nnvirtual)
(require 'gnus-sum)
30
(require 'gnus-score)
31
(eval-when-compile
32 33 34 35
  (if (featurep 'xemacs)
      (require 'itimer)
    (require 'timer))
  (require 'cl))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82

(defcustom gnus-agent-directory (nnheader-concat gnus-directory "agent/")
  "Where the Gnus agent will store its files."
  :group 'gnus-agent
  :type 'directory)

(defcustom gnus-agent-plugged-hook nil
  "Hook run when plugging into the network."
  :group 'gnus-agent
  :type 'hook)

(defcustom gnus-agent-unplugged-hook nil
  "Hook run when unplugging from the network."
  :group 'gnus-agent
  :type 'hook)

(defcustom gnus-agent-handle-level gnus-level-subscribed
  "Groups on levels higher than this variable will be ignored by the Agent."
  :group 'gnus-agent
  :type 'integer)

(defcustom gnus-agent-expire-days 7
  "Read articles older than this will be expired."
  :group 'gnus-agent
  :type 'integer)

(defcustom gnus-agent-expire-all nil
  "If non-nil, also expire unread, ticked and dormant articles.
If nil, only read articles will be expired."
  :group 'gnus-agent
  :type 'boolean)

(defcustom gnus-agent-group-mode-hook nil
  "Hook run in Agent group minor modes."
  :group 'gnus-agent
  :type 'hook)

(defcustom gnus-agent-summary-mode-hook nil
  "Hook run in Agent summary minor modes."
  :group 'gnus-agent
  :type 'hook)

(defcustom gnus-agent-server-mode-hook nil
  "Hook run in Agent summary minor modes."
  :group 'gnus-agent
  :type 'hook)

83 84
(defcustom gnus-agent-confirmation-function 'y-or-n-p
  "Function to confirm when error happens."
85
  :version "21.1"
86 87
  :group 'gnus-agent
  :type 'function)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
88

89 90 91
(defcustom gnus-agent-synchronize-flags 'ask
  "Indicate if flags are synchronized when you plug in.
If this is `ask' the hook will query the user."
92
  :version "21.1"
93 94 95 96 97
  :type '(choice (const :tag "Always" t)
		 (const :tag "Never" nil)
		 (const :tag "Ask" ask))
  :group 'gnus-agent)

98
;;; Internal variables
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
99 100 101 102 103 104 105 106 107 108 109 110 111 112

(defvar gnus-agent-history-buffers nil)
(defvar gnus-agent-buffer-alist nil)
(defvar gnus-agent-article-alist nil)
(defvar gnus-agent-group-alist nil)
(defvar gnus-agent-covered-methods nil)
(defvar gnus-category-alist nil)
(defvar gnus-agent-current-history nil)
(defvar gnus-agent-overview-buffer nil)
(defvar gnus-category-predicate-cache nil)
(defvar gnus-category-group-cache nil)
(defvar gnus-agent-spam-hashtb nil)
(defvar gnus-agent-file-name nil)
(defvar gnus-agent-send-mail-function nil)
113 114
(defvar gnus-agent-file-coding-system 'raw-text)

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
115 116 117 118 119 120 121 122 123 124 125 126
;; Dynamic variables
(defvar gnus-headers)
(defvar gnus-score)

;;;
;;; Setup
;;;

(defun gnus-open-agent ()
  (setq gnus-agent t)
  (gnus-agent-read-servers)
  (gnus-category-read)
127
  (gnus-agent-create-buffer)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
128 129 130 131
  (add-hook 'gnus-group-mode-hook 'gnus-agent-mode)
  (add-hook 'gnus-summary-mode-hook 'gnus-agent-mode)
  (add-hook 'gnus-server-mode-hook 'gnus-agent-mode))

132 133 134 135 136 137 138 139 140
(defun gnus-agent-create-buffer ()
  (if (gnus-buffer-live-p gnus-agent-overview-buffer)
      t
    (setq gnus-agent-overview-buffer
	  (gnus-get-buffer-create " *Gnus agent overview*"))
    (with-current-buffer gnus-agent-overview-buffer
      (mm-enable-multibyte))
    nil))

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
(gnus-add-shutdown 'gnus-close-agent 'gnus)

(defun gnus-close-agent ()
  (setq gnus-agent-covered-methods nil
	gnus-category-predicate-cache nil
	gnus-category-group-cache nil
	gnus-agent-spam-hashtb nil)
  (gnus-kill-buffer gnus-agent-overview-buffer))

;;;
;;; Utility functions
;;;

(defun gnus-agent-read-file (file)
  "Load FILE and do a `read' there."
156
  (with-temp-buffer
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
157 158 159 160 161 162 163 164 165 166 167 168
    (ignore-errors
      (nnheader-insert-file-contents file)
      (goto-char (point-min))
      (read (current-buffer)))))

(defsubst gnus-agent-method ()
  (concat (symbol-name (car gnus-command-method)) "/"
	  (if (equal (cadr gnus-command-method) "")
	      "unnamed"
	    (cadr gnus-command-method))))

(defsubst gnus-agent-directory ()
169
  "The name of the Gnus agent directory."
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
170 171 172 173
  (nnheader-concat gnus-agent-directory
		   (nnheader-translate-file-chars (gnus-agent-method)) "/"))

(defun gnus-agent-lib-file (file)
174
  "The full name of the Gnus agent library FILE."
175 176 177
  (expand-file-name file
		    (file-name-as-directory
		     (expand-file-name "agent.lib" (gnus-agent-directory)))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
178 179 180 181 182 183

;;; Fetching setup functions.

(defun gnus-agent-start-fetch ()
  "Initialize data structures for efficient fetching."
  (gnus-agent-open-history)
184 185
  (setq gnus-agent-current-history (gnus-agent-history-buffer))
  (gnus-agent-create-buffer))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
186 187 188 189 190 191 192 193 194 195 196 197 198

(defun gnus-agent-stop-fetch ()
  "Save all data structures and clean up."
  (gnus-agent-save-history)
  (gnus-agent-close-history)
  (setq gnus-agent-spam-hashtb nil)
  (save-excursion
    (set-buffer nntp-server-buffer)
    (widen)))

(defmacro gnus-agent-with-fetch (&rest forms)
  "Do FORMS safely."
  `(unwind-protect
199
       (let ((gnus-agent-fetching t))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245
	 (gnus-agent-start-fetch)
	 ,@forms)
     (gnus-agent-stop-fetch)))

(put 'gnus-agent-with-fetch 'lisp-indent-function 0)
(put 'gnus-agent-with-fetch 'edebug-form-spec '(body))

;;;
;;; Mode infestation
;;;

(defvar gnus-agent-mode-hook nil
  "Hook run when installing agent mode.")

(defvar gnus-agent-mode nil)
(defvar gnus-agent-mode-status '(gnus-agent-mode " Plugged"))

(defun gnus-agent-mode ()
  "Minor mode for providing a agent support in Gnus buffers."
  (let* ((buffer (progn (string-match "^gnus-\\(.*\\)-mode$"
				      (symbol-name major-mode))
			(match-string 1 (symbol-name major-mode))))
	 (mode (intern (format "gnus-agent-%s-mode" buffer))))
    (set (make-local-variable 'gnus-agent-mode) t)
    (set mode nil)
    (set (make-local-variable mode) t)
    ;; Set up the menu.
    (when (gnus-visual-p 'agent-menu 'menu)
      (funcall (intern (format "gnus-agent-%s-make-menu-bar" buffer))))
    (unless (assq 'gnus-agent-mode minor-mode-alist)
      (push gnus-agent-mode-status minor-mode-alist))
    (unless (assq mode minor-mode-map-alist)
      (push (cons mode (symbol-value (intern (format "gnus-agent-%s-mode-map"
						     buffer))))
	    minor-mode-map-alist))
    (when (eq major-mode 'gnus-group-mode)
      (gnus-agent-toggle-plugged gnus-plugged))
    (gnus-run-hooks 'gnus-agent-mode-hook
		    (intern (format "gnus-agent-%s-mode-hook" buffer)))))

(defvar gnus-agent-group-mode-map (make-sparse-keymap))
(gnus-define-keys gnus-agent-group-mode-map
  "Ju" gnus-agent-fetch-groups
  "Jc" gnus-enter-category-buffer
  "Jj" gnus-agent-toggle-plugged
  "Js" gnus-agent-fetch-session
246
  "JY" gnus-agent-synchronize-flags
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
247
  "JS" gnus-group-send-drafts
248 249
  "Ja" gnus-agent-add-group
  "Jr" gnus-agent-remove-group)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302

(defun gnus-agent-group-make-menu-bar ()
  (unless (boundp 'gnus-agent-group-menu)
    (easy-menu-define
     gnus-agent-group-menu gnus-agent-group-mode-map ""
     '("Agent"
       ["Toggle plugged" gnus-agent-toggle-plugged t]
       ["List categories" gnus-enter-category-buffer t]
       ["Send drafts" gnus-group-send-drafts gnus-plugged]
       ("Fetch"
	["All" gnus-agent-fetch-session gnus-plugged]
	["Group" gnus-agent-fetch-group gnus-plugged])))))

(defvar gnus-agent-summary-mode-map (make-sparse-keymap))
(gnus-define-keys gnus-agent-summary-mode-map
  "Jj" gnus-agent-toggle-plugged
  "J#" gnus-agent-mark-article
  "J\M-#" gnus-agent-unmark-article
  "@" gnus-agent-toggle-mark
  "Jc" gnus-agent-catchup)

(defun gnus-agent-summary-make-menu-bar ()
  (unless (boundp 'gnus-agent-summary-menu)
    (easy-menu-define
     gnus-agent-summary-menu gnus-agent-summary-mode-map ""
     '("Agent"
       ["Toggle plugged" gnus-agent-toggle-plugged t]
       ["Mark as downloadable" gnus-agent-mark-article t]
       ["Unmark as downloadable" gnus-agent-unmark-article t]
       ["Toggle mark" gnus-agent-toggle-mark t]
       ["Catchup undownloaded" gnus-agent-catchup t]))))

(defvar gnus-agent-server-mode-map (make-sparse-keymap))
(gnus-define-keys gnus-agent-server-mode-map
  "Jj" gnus-agent-toggle-plugged
  "Ja" gnus-agent-add-server
  "Jr" gnus-agent-remove-server)

(defun gnus-agent-server-make-menu-bar ()
  (unless (boundp 'gnus-agent-server-menu)
    (easy-menu-define
     gnus-agent-server-menu gnus-agent-server-mode-map ""
     '("Agent"
       ["Toggle plugged" gnus-agent-toggle-plugged t]
       ["Add" gnus-agent-add-server t]
       ["Remove" gnus-agent-remove-server t]))))

(defun gnus-agent-toggle-plugged (plugged)
  "Toggle whether Gnus is unplugged or not."
  (interactive (list (not gnus-plugged)))
  (if plugged
      (progn
	(setq gnus-plugged plugged)
303
	(gnus-agent-possibly-synchronize-flags)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368
	(gnus-run-hooks 'gnus-agent-plugged-hook)
	(setcar (cdr gnus-agent-mode-status) " Plugged"))
    (gnus-agent-close-connections)
    (setq gnus-plugged plugged)
    (gnus-run-hooks 'gnus-agent-unplugged-hook)
    (setcar (cdr gnus-agent-mode-status) " Unplugged"))
  (set-buffer-modified-p t))

(defun gnus-agent-close-connections ()
  "Close all methods covered by the Gnus agent."
  (let ((methods gnus-agent-covered-methods))
    (while methods
      (gnus-close-server (pop methods)))))

;;;###autoload
(defun gnus-unplugged ()
  "Start Gnus unplugged."
  (interactive)
  (setq gnus-plugged nil)
  (gnus))

;;;###autoload
(defun gnus-plugged ()
  "Start Gnus plugged."
  (interactive)
  (setq gnus-plugged t)
  (gnus))

;;;###autoload
(defun gnus-agentize ()
  "Allow Gnus to be an offline newsreader.
The normal usage of this command is to put the following as the
last form in your `.gnus.el' file:

\(gnus-agentize)

This will modify the `gnus-before-startup-hook', `gnus-post-method',
and `message-send-mail-function' variables, and install the Gnus
agent minor mode in all Gnus buffers."
  (interactive)
  (gnus-open-agent)
  (add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
  (unless gnus-agent-send-mail-function
    (setq gnus-agent-send-mail-function message-send-mail-function
	  message-send-mail-function 'gnus-agent-send-mail))
  (unless gnus-agent-covered-methods
    (setq gnus-agent-covered-methods (list gnus-select-method))))

(defun gnus-agent-queue-setup ()
  "Make sure the queue group exists."
  (unless (gnus-gethash "nndraft:queue" gnus-newsrc-hashtb)
    (gnus-request-create-group "queue" '(nndraft ""))
    (let ((gnus-level-default-subscribed 1))
      (gnus-subscribe-group "nndraft:queue" nil '(nndraft "")))
    (gnus-group-set-parameter
     "nndraft:queue" 'gnus-dummy '((gnus-draft-mode)))))

(defun gnus-agent-send-mail ()
  (if gnus-plugged
      (funcall gnus-agent-send-mail-function)
    (goto-char (point-min))
    (re-search-forward
     (concat "^" (regexp-quote mail-header-separator) "\n"))
    (replace-match "\n")
    (gnus-agent-insert-meta-information 'mail)
369
    (gnus-request-accept-article "nndraft:queue" nil t t)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
370 371 372 373 374 375 376 377 378 379 380 381 382 383 384

(defun gnus-agent-insert-meta-information (type &optional method)
  "Insert meta-information into the message that says how it's to be posted.
TYPE can be either `mail' or `news'.  If the latter METHOD can
be a select method."
  (save-excursion
    (message-remove-header gnus-agent-meta-information-header)
    (goto-char (point-min))
    (insert gnus-agent-meta-information-header ": "
	    (symbol-name type) " " (format "%S" method)
	    "\n")
    (forward-char -1)
    (while (search-backward "\n" nil t)
      (replace-match "\\n" t t))))

385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421
(defun gnus-agent-restore-gcc ()
  "Restore GCC field from saved header."
  (save-excursion
    (goto-char (point-min))
    (while (re-search-forward (concat gnus-agent-gcc-header ":") nil t)
      (replace-match "Gcc:" 'fixedcase))))

(defun gnus-agent-any-covered-gcc ()
  (save-restriction
    (message-narrow-to-headers)
    (let* ((gcc (mail-fetch-field "gcc" nil t))
	   (methods (and gcc 
			 (mapcar 'gnus-inews-group-method
				 (message-unquote-tokens
				  (message-tokenize-header 
				   gcc " ,")))))
	   covered)
      (while (and (not covered) methods)
	(setq covered
	      (member (car methods) gnus-agent-covered-methods)
	      methods (cdr methods)))
      covered)))

(defun gnus-agent-possibly-save-gcc ()
  "Save GCC if Gnus is unplugged."
  (when (and (not gnus-plugged) (gnus-agent-any-covered-gcc))
    (save-excursion
      (goto-char (point-min))
      (let ((case-fold-search t))
	(while (re-search-forward "^gcc:" nil t)
	  (replace-match (concat gnus-agent-gcc-header ":") 'fixedcase))))))

(defun gnus-agent-possibly-do-gcc ()
  "Do GCC if Gnus is plugged."
  (when (or gnus-plugged (not (gnus-agent-any-covered-gcc)))
    (gnus-inews-do-gcc)))

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
422 423 424 425 426 427 428
;;;
;;; Group mode commands
;;;

(defun gnus-agent-fetch-groups (n)
  "Put all new articles in the current groups into the Agent."
  (interactive "P")
429 430
  (unless gnus-plugged
    (error "Groups can't be fetched when Gnus is unplugged"))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
431 432 433 434 435
  (gnus-group-iterate n 'gnus-agent-fetch-group))

(defun gnus-agent-fetch-group (group)
  "Put all new articles in GROUP into the Agent."
  (interactive (list (gnus-group-group-name)))
436 437
  (unless gnus-plugged
    (error "Groups can't be fetched when Gnus is unplugged"))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465
  (unless group
    (error "No group on the current line"))
  (let ((gnus-command-method (gnus-find-method-for-group group)))
    (gnus-agent-with-fetch
      (gnus-agent-fetch-group-1 group gnus-command-method)
      (gnus-message 5 "Fetching %s...done" group))))

(defun gnus-agent-add-group (category arg)
  "Add the current group to an agent category."
  (interactive
   (list
    (intern
     (completing-read
      "Add to category: "
      (mapcar (lambda (cat) (list (symbol-name (car cat))))
	      gnus-category-alist)
      nil t))
    current-prefix-arg))
  (let ((cat (assq category gnus-category-alist))
	c groups)
    (gnus-group-iterate arg
      (lambda (group)
	(when (cadddr (setq c (gnus-group-category group)))
	  (setf (cadddr c) (delete group (cadddr c))))
	(push group groups)))
    (setf (cadddr cat) (nconc (cadddr cat) groups))
    (gnus-category-write)))

466 467 468 469 470 471 472 473 474 475
(defun gnus-agent-remove-group (arg)
  "Remove the current group from its agent category, if any."
  (interactive "P")
  (let (c)
    (gnus-group-iterate arg
      (lambda (group)
	(when (cadddr (setq c (gnus-group-category group)))
	  (setf (cadddr c) (delete group (cadddr c))))))
    (gnus-category-write)))

476 477 478 479 480 481 482 483 484 485
(defun gnus-agent-synchronize-flags ()
  "Synchronize unplugged flags with servers."
  (interactive)
  (save-excursion
    (dolist (gnus-command-method gnus-agent-covered-methods)
      (when (file-exists-p (gnus-agent-lib-file "flags"))
	(gnus-agent-synchronize-flags-server gnus-command-method)))))

(defun gnus-agent-possibly-synchronize-flags ()
  "Synchronize flags according to `gnus-agent-synchronize-flags'."
486 487 488 489
  (interactive)
  (save-excursion
    (dolist (gnus-command-method gnus-agent-covered-methods)
      (when (file-exists-p (gnus-agent-lib-file "flags"))
490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518
	(gnus-agent-possibly-synchronize-flags-server gnus-command-method)))))

(defun gnus-agent-synchronize-flags-server (method)
  "Synchronize flags set when unplugged for server."
  (let ((gnus-command-method method))
    (when (file-exists-p (gnus-agent-lib-file "flags"))
      (set-buffer (get-buffer-create " *Gnus Agent flag synchronize*"))
      (erase-buffer)
      (nnheader-insert-file-contents (gnus-agent-lib-file "flags"))
      (if (null (gnus-check-server gnus-command-method))
	  (message "Couldn't open server %s" (nth 1 gnus-command-method))
	(while (not (eobp))
	  (if (null (eval (read (current-buffer))))
	      (progn (forward-line)
		     (kill-line -1))
	    (write-file (gnus-agent-lib-file "flags"))
	    (error "Couldn't set flags from file %s"
		   (gnus-agent-lib-file "flags"))))
	(delete-file (gnus-agent-lib-file "flags")))
      (kill-buffer nil))))

(defun gnus-agent-possibly-synchronize-flags-server (method)
  "Synchronize flags for server according to `gnus-agent-synchronize-flags'."
  (when (or (and gnus-agent-synchronize-flags
		 (not (eq gnus-agent-synchronize-flags 'ask)))
	    (and (eq gnus-agent-synchronize-flags 'ask)
		 (gnus-y-or-n-p (format "Synchronize flags on server `%s'? " 
					(cadr method)))))
    (gnus-agent-synchronize-flags-server method)))
519

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556
;;;
;;; Server mode commands
;;;

(defun gnus-agent-add-server (server)
  "Enroll SERVER in the agent program."
  (interactive (list (gnus-server-server-name)))
  (unless server
    (error "No server on the current line"))
  (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
    (when (member method gnus-agent-covered-methods)
      (error "Server already in the agent program"))
    (push method gnus-agent-covered-methods)
    (gnus-agent-write-servers)
    (message "Entered %s into the Agent" server)))

(defun gnus-agent-remove-server (server)
  "Remove SERVER from the agent program."
  (interactive (list (gnus-server-server-name)))
  (unless server
    (error "No server on the current line"))
  (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
    (unless (member method gnus-agent-covered-methods)
      (error "Server not in the agent program"))
    (setq gnus-agent-covered-methods
	  (delete method gnus-agent-covered-methods))
    (gnus-agent-write-servers)
    (message "Removed %s from the agent" server)))

(defun gnus-agent-read-servers ()
  "Read the alist of covered servers."
  (setq gnus-agent-covered-methods
	(gnus-agent-read-file
	 (nnheader-concat gnus-agent-directory "lib/servers"))))

(defun gnus-agent-write-servers ()
  "Write the alist of covered servers."
557 558 559 560 561
  (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
  (let ((coding-system-for-write nnheader-file-coding-system)
	(file-name-coding-system nnmail-pathname-coding-system))
    (with-temp-file (nnheader-concat gnus-agent-directory "lib/servers")
      (prin1 gnus-agent-covered-methods (current-buffer)))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624

;;;
;;; Summary commands
;;;

(defun gnus-agent-mark-article (n &optional unmark)
  "Mark the next N articles as downloadable.
If N is negative, mark backward instead.  If UNMARK is non-nil, remove
the mark instead.  The difference between N and the actual number of
articles marked is returned."
  (interactive "p")
  (let ((backward (< n 0))
	(n (abs n)))
    (while (and
	    (> n 0)
	    (progn
	      (gnus-summary-set-agent-mark
	       (gnus-summary-article-number) unmark)
	      (zerop (gnus-summary-next-subject (if backward -1 1) nil t))))
      (setq n (1- n)))
    (when (/= 0 n)
      (gnus-message 7 "No more articles"))
    (gnus-summary-recenter)
    (gnus-summary-position-point)
    n))

(defun gnus-agent-unmark-article (n)
  "Remove the downloadable mark from the next N articles.
If N is negative, unmark backward instead.  The difference between N and
the actual number of articles unmarked is returned."
  (interactive "p")
  (gnus-agent-mark-article n t))

(defun gnus-agent-toggle-mark (n)
  "Toggle the downloadable mark from the next N articles.
If N is negative, toggle backward instead.  The difference between N and
the actual number of articles toggled is returned."
  (interactive "p")
  (gnus-agent-mark-article n 'toggle))

(defun gnus-summary-set-agent-mark (article &optional unmark)
  "Mark ARTICLE as downloadable."
  (let ((unmark (if (and (not (null unmark)) (not (eq t unmark)))
		    (memq article gnus-newsgroup-downloadable)
		  unmark)))
    (if unmark
	(progn
	  (setq gnus-newsgroup-downloadable
		(delq article gnus-newsgroup-downloadable))
	  (push article gnus-newsgroup-undownloaded))
      (setq gnus-newsgroup-undownloaded
	    (delq article gnus-newsgroup-undownloaded))
      (push article gnus-newsgroup-downloadable))
    (gnus-summary-update-mark
     (if unmark gnus-undownloaded-mark gnus-downloadable-mark)
     'unread)))

(defun gnus-agent-get-undownloaded-list ()
  "Mark all unfetched articles as read."
  (let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
    (when (and (not gnus-plugged)
	       (gnus-agent-method-p gnus-command-method))
      (gnus-agent-load-alist gnus-newsgroup-name)
625 626 627 628
      ;; First mark all undownloaded articles as undownloaded.
      (let ((articles (append gnus-newsgroup-unreads
			      gnus-newsgroup-marked
			      gnus-newsgroup-dormant))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
629 630 631
	    article)
	(while (setq article (pop articles))
	  (unless (or (cdr (assq article gnus-agent-article-alist))
632 633 634 635 636 637 638 639 640 641 642
		      (memq article gnus-newsgroup-downloadable)
		      (memq article gnus-newsgroup-cached))
	    (push article gnus-newsgroup-undownloaded))))
      ;; Then mark downloaded downloadable as not-downloadable,
      ;; if you get my drift.
      (let ((articles gnus-newsgroup-downloadable)
	    article)
	(while (setq article (pop articles))
	  (when (cdr (assq article gnus-agent-article-alist))
	    (setq gnus-newsgroup-downloadable
		  (delq article gnus-newsgroup-downloadable))))))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
643 644 645 646 647 648 649 650 651 652 653 654 655 656 657

(defun gnus-agent-catchup ()
  "Mark all undownloaded articles as read."
  (interactive)
  (save-excursion
    (while gnus-newsgroup-undownloaded
      (gnus-summary-mark-article
       (pop gnus-newsgroup-undownloaded) gnus-catchup-mark)))
  (gnus-summary-position-point))

;;;
;;; Internal functions
;;;

(defun gnus-agent-save-active (method)
658 659 660
  (gnus-agent-save-active-1 method 'gnus-active-to-gnus-format))

(defun gnus-agent-save-active-1 (method function)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
661 662
  (when (gnus-agent-method-p method)
    (let* ((gnus-command-method method)
663
	   (new (gnus-make-hashtable (count-lines (point-min) (point-max))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
664
	   (file (gnus-agent-lib-file "active")))
665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685
      (funcall function nil new)
      (gnus-agent-write-active file new)
      (erase-buffer)
      (nnheader-insert-file-contents file))))

(defun gnus-agent-write-active (file new)
  (let ((orig (gnus-make-hashtable (count-lines (point-min) (point-max))))
	(file (gnus-agent-lib-file "active"))
	elem osym)
    (when (file-exists-p file)
      (with-temp-buffer
	(nnheader-insert-file-contents file)
	(gnus-active-to-gnus-format nil orig))
      (mapatoms
       (lambda (sym)
	 (when (and sym (boundp sym))
	   (if (and (boundp (setq osym (intern (symbol-name sym) orig)))
		    (setq elem (symbol-value osym)))
	       (setcdr elem (cdr (symbol-value sym)))
	     (set (intern (symbol-name sym) orig) (symbol-value sym)))))
       new))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
686 687
    (gnus-make-directory (file-name-directory file))
    (let ((coding-system-for-write gnus-agent-file-coding-system))
688 689 690 691 692 693
      ;; The hashtable contains real names of groups,  no more prefix
      ;; removing, so set `full' to `t'.
      (gnus-write-active-file file orig t))))

(defun gnus-agent-save-groups (method)
  (gnus-agent-save-active-1 method 'gnus-groups-to-gnus-format))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
694 695 696 697

(defun gnus-agent-save-group-info (method group active)
  (when (gnus-agent-method-p method)
    (let* ((gnus-command-method method)
698 699 700 701
	   (coding-system-for-write nnheader-file-coding-system)
	   (file-name-coding-system nnmail-pathname-coding-system)
	   (file (gnus-agent-lib-file "active"))
	   oactive)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
702
      (gnus-make-directory (file-name-directory file))
703 704 705
      (with-temp-file file
	;; Emacs got problem to match non-ASCII group in multibyte buffer.
	(mm-disable-multibyte) 
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
706 707 708
	(when (file-exists-p file)
	  (nnheader-insert-file-contents file))
	(goto-char (point-min))
709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724
	(when (re-search-forward
	       (concat "^" (regexp-quote group) " ") nil t)
	  (save-excursion
	    (save-restriction
	      (narrow-to-region (match-beginning 0)
				(progn
				  (forward-line 1)
				  (point)))
	      (setq oactive (car (nnmail-parse-active)))))
	  (gnus-delete-line))
	(insert (format "%S %d %d y\n" (intern group)
			(cdr active)
			(or (car oactive) (car active))))
	(goto-char (point-max))
	(while (search-backward "\\." nil t)
	  (delete-char 1))))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
725 726

(defun gnus-agent-group-path (group)
727
  "Translate GROUP into a file name."
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
728 729
  (if nnmail-use-long-file-names
      (gnus-group-real-name group)
730 731 732 733 734 735 736 737
    (nnheader-translate-file-chars
     (nnheader-replace-chars-in-string
      (nnheader-replace-duplicate-chars-in-string
       (nnheader-replace-chars-in-string 
	(gnus-group-real-name group)
	?/ ?_)
       ?. ?_)
      ?. ?/))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764



(defun gnus-agent-method-p (method)
  "Say whether METHOD is covered by the agent."
  (member method gnus-agent-covered-methods))

(defun gnus-agent-get-function (method)
  (if (and (not gnus-plugged)
	   (gnus-agent-method-p method))
      (progn
	(require 'nnagent)
	'nnagent)
    (car method)))

;;; History functions

(defun gnus-agent-history-buffer ()
  (cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))

(defun gnus-agent-open-history ()
  (save-excursion
    (push (cons (gnus-agent-method)
		(set-buffer (gnus-get-buffer-create
			     (format " *Gnus agent %s history*"
				     (gnus-agent-method)))))
	  gnus-agent-history-buffers)
765
    (mm-disable-multibyte) ;; everything is binary
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
766 767 768 769
    (erase-buffer)
    (insert "\n")
    (let ((file (gnus-agent-lib-file "history")))
      (when (file-exists-p file)
770
	(nnheader-insert-file-contents file))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791
      (set (make-local-variable 'gnus-agent-file-name) file))))

(defun gnus-agent-save-history ()
  (save-excursion
    (set-buffer gnus-agent-current-history)
    (gnus-make-directory (file-name-directory gnus-agent-file-name))
    (let ((coding-system-for-write gnus-agent-file-coding-system))
      (write-region (1+ (point-min)) (point-max)
		    gnus-agent-file-name nil 'silent))))

(defun gnus-agent-close-history ()
  (when (gnus-buffer-live-p gnus-agent-current-history)
    (kill-buffer gnus-agent-current-history)
    (setq gnus-agent-history-buffers
	  (delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
		gnus-agent-history-buffers))))

(defun gnus-agent-enter-history (id group-arts date)
  (save-excursion
    (set-buffer gnus-agent-current-history)
    (goto-char (point-max))
792 793 794 795 796 797 798 799 800
    (let ((p (point)))
      (insert id "\t" (number-to-string date) "\t")
      (while group-arts
	(insert (format "%S" (intern (caar group-arts)))
		" " (number-to-string (cdr (pop group-arts)))
		" "))
      (insert "\n")
      (while (search-backward "\\." p t)
	(delete-char 1)))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828

(defun gnus-agent-article-in-history-p (id)
  (save-excursion
    (set-buffer (gnus-agent-history-buffer))
    (goto-char (point-min))
    (search-forward (concat "\n" id "\t") nil t)))

(defun gnus-agent-history-path (id)
  (save-excursion
    (set-buffer (gnus-agent-history-buffer))
    (goto-char (point-min))
    (when (search-forward (concat "\n" id "\t") nil t)
      (let ((method (gnus-agent-method)))
	(let (paths group)
	  (while (not (numberp (setq group (read (current-buffer)))))
	    (push (concat method "/" group) paths))
	  (nreverse paths))))))

;;;
;;; Fetching
;;;

(defun gnus-agent-fetch-articles (group articles)
  "Fetch ARTICLES from GROUP and put them into the Agent."
  (when articles
    ;; Prune off articles that we have already fetched.
    (while (and articles
		(cdr (assq (car articles) gnus-agent-article-alist)))
829
      (pop articles))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
830 831 832 833 834 835 836 837 838
    (let ((arts articles))
      (while (cdr arts)
	(if (cdr (assq (cadr arts) gnus-agent-article-alist))
	    (setcdr arts (cddr arts))
	  (setq arts (cdr arts)))))
    (when articles
      (let ((dir (concat
		  (gnus-agent-directory)
		  (gnus-agent-group-path group) "/"))
839
	    (date (time-to-days (current-time)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
840 841 842 843 844 845 846
	    (case-fold-search t)
	    pos crosses id elem)
	(gnus-make-directory dir)
	(gnus-message 7 "Fetching articles for %s..." group)
	;; Fetch the articles from the backend.
	(if (gnus-check-backend-function 'retrieve-articles group)
	    (setq pos (gnus-retrieve-articles articles group))
847
	  (with-temp-buffer
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
848 849
	    (let (article)
	      (while (setq article (pop articles))
850 851 852 853
		(when (or 
		       (gnus-backlog-request-article group article 
						     nntp-server-buffer)
		       (gnus-request-article article group))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911
		  (goto-char (point-max))
		  (push (cons article (point)) pos)
		  (insert-buffer-substring nntp-server-buffer)))
	      (copy-to-buffer nntp-server-buffer (point-min) (point-max))
	      (setq pos (nreverse pos)))))
	;; Then save these articles into the Agent.
	(save-excursion
	  (set-buffer nntp-server-buffer)
	  (while pos
	    (narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
	    (goto-char (point-min))
	    (when (search-forward "\n\n" nil t)
	      (when (search-backward "\nXrefs: " nil t)
		;; Handle crossposting.
		(skip-chars-forward "^ ")
		(skip-chars-forward " ")
		(setq crosses nil)
		(while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) +")
		  (push (cons (buffer-substring (match-beginning 1)
						(match-end 1))
			      (buffer-substring (match-beginning 2)
						(match-end 2)))
			crosses)
		  (goto-char (match-end 0)))
		(gnus-agent-crosspost crosses (caar pos))))
	    (goto-char (point-min))
	    (if (not (re-search-forward "^Message-ID: *<\\([^>\n]+\\)>" nil t))
		(setq id "No-Message-ID-in-article")
	      (setq id (buffer-substring (match-beginning 1) (match-end 1))))
	    (let ((coding-system-for-write
		   gnus-agent-file-coding-system))
	      (write-region (point-min) (point-max)
			    (concat dir (number-to-string (caar pos)))
			    nil 'silent))
	    (when (setq elem (assq (caar pos) gnus-agent-article-alist))
	      (setcdr elem t))
	    (gnus-agent-enter-history
	     id (or crosses (list (cons group (caar pos)))) date)
	    (widen)
	    (pop pos)))
	(gnus-agent-save-alist group)))))

(defun gnus-agent-crosspost (crosses article)
  (let (gnus-agent-article-alist group alist beg end)
    (save-excursion
      (set-buffer gnus-agent-overview-buffer)
      (when (nnheader-find-nov-line article)
	(forward-word 1)
	(setq beg (point))
	(setq end (progn (forward-line 1) (point)))))
    (while crosses
      (setq group (caar crosses))
      (unless (setq alist (assoc group gnus-agent-group-alist))
	(push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
	      gnus-agent-group-alist))
      (setcdr alist (cons (cons (cdar crosses) t) (cdr alist)))
      (save-excursion
	(set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
912
						    group)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
	(when (= (point-max) (point-min))
	  (push (cons group (current-buffer)) gnus-agent-buffer-alist)
	  (ignore-errors
	    (nnheader-insert-file-contents
	     (gnus-agent-article-name ".overview" group))))
	(nnheader-find-nov-line (string-to-number (cdar crosses)))
	(insert (string-to-number (cdar crosses)))
	(insert-buffer-substring gnus-agent-overview-buffer beg end))
      (pop crosses))))

(defun gnus-agent-flush-cache ()
  (save-excursion
    (while gnus-agent-buffer-alist
      (set-buffer (cdar gnus-agent-buffer-alist))
      (let ((coding-system-for-write
	     gnus-agent-file-coding-system))
	(write-region (point-min) (point-max)
		      (gnus-agent-article-name ".overview"
					       (caar gnus-agent-buffer-alist))
		      nil 'silent))
      (pop gnus-agent-buffer-alist))
    (while gnus-agent-group-alist
935
      (with-temp-file (caar gnus-agent-group-alist)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
936 937 938 939
	(princ (cdar gnus-agent-group-alist))
	(insert "\n"))
      (pop gnus-agent-group-alist))))

940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955
(if (fboundp 'union)
    (defalias 'gnus-agent-union 'union)
  (defun gnus-agent-union (l1 l2)
    "Set union of lists L1 and L2."
    (cond ((null l1) l2)
	  ((null l2) l1)
	  ((equal l1 l2) l1)
	  (t
	   (or (>= (length l1) (length l2))
	       (setq l1 (prog1 l2 (setq l2 l1))))
	   (while l2
	     (or (memq (car l2) l1)
		 (push (car l2) l1))
	     (pop l2))
	   l1))))

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
956
(defun gnus-agent-fetch-headers (group &optional force)
957 958 959 960 961 962 963 964 965 966 967 968 969 970 971
  (let ((articles (gnus-list-of-unread-articles group))
	(gnus-decode-encoded-word-function 'identity)
	(file (gnus-agent-article-name ".overview" group)))
    ;; Add article with marks to list of article headers we want to fetch.
    (dolist (arts (gnus-info-marks (gnus-get-info group)))
      (setq articles (gnus-agent-union (gnus-uncompress-sequence (cdr arts))
			    articles)))
    (setq articles (sort articles '<))
    ;; Remove known articles.
    (when (gnus-agent-load-alist group)
      (setq articles (gnus-sorted-intersection
		      articles
		      (gnus-uncompress-range
		       (cons (1+ (caar (last gnus-agent-article-alist)))
			     (cdr (gnus-active group)))))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
972
    ;; Fetch them.
973 974
    (gnus-make-directory (nnheader-translate-file-chars
			  (file-name-directory file) t))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
975 976 977
    (when articles
      (gnus-message 7 "Fetching headers for %s..." group)
      (save-excursion
978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993
 	(set-buffer nntp-server-buffer)
 	(unless (eq 'nov (gnus-retrieve-headers articles group))
 	  (nnvirtual-convert-headers))
 	;; Save these headers for later processing.
 	(copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
	(when (file-exists-p file)
	  (gnus-agent-braid-nov group articles file))
	(let ((coding-system-for-write
	       gnus-agent-file-coding-system))
	  (write-region (point-min) (point-max) file nil 'silent))
	(gnus-agent-save-alist group articles nil)
	(gnus-agent-enter-history
	 "last-header-fetched-for-session"
	 (list (cons group (nth (- (length  articles) 1) articles)))
	 (time-to-days (current-time)))
	articles))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048

(defsubst gnus-agent-copy-nov-line (article)
  (let (b e)
    (set-buffer gnus-agent-overview-buffer)
    (setq b (point))
    (if (eq article (read (current-buffer)))
	(setq e (progn (forward-line 1) (point)))
      (progn
	(beginning-of-line)
	(setq e b)))
    (set-buffer nntp-server-buffer)
    (insert-buffer-substring gnus-agent-overview-buffer b e)))

(defun gnus-agent-braid-nov (group articles file)
  (set-buffer gnus-agent-overview-buffer)
  (goto-char (point-min))
  (set-buffer nntp-server-buffer)
  (erase-buffer)
  (nnheader-insert-file-contents file)
  (goto-char (point-max))
  (if (or (= (point-min) (point-max))
	  (progn
	    (forward-line -1)
	    (< (read (current-buffer)) (car articles))))
      ;; We have only headers that are after the older headers,
      ;; so we just append them.
      (progn
	(goto-char (point-max))
	(insert-buffer-substring gnus-agent-overview-buffer))
    ;; We do it the hard way.
    (nnheader-find-nov-line (car articles))
    (gnus-agent-copy-nov-line (car articles))
    (pop articles)
    (while (and articles
		(not (eobp)))
      (while (and (not (eobp))
		  (< (read (current-buffer)) (car articles)))
	(forward-line 1))
      (beginning-of-line)
      (unless (eobp)
	(gnus-agent-copy-nov-line (car articles))
	(setq articles (cdr articles))))
    (when articles
      (let (b e)
	(set-buffer gnus-agent-overview-buffer)
	(setq b (point)
	      e (point-max))
	(set-buffer nntp-server-buffer)
	(insert-buffer-substring gnus-agent-overview-buffer b e)))))

(defun gnus-agent-load-alist (group &optional dir)
  "Load the article-state alist for GROUP."
  (setq gnus-agent-article-alist
	(gnus-agent-read-file
	 (if dir
1049
	     (expand-file-name ".agentview" dir)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1050 1051 1052 1053
	   (gnus-agent-article-name ".agentview" group)))))

(defun gnus-agent-save-alist (group &optional articles state dir)
  "Save the article-state alist for GROUP."
1054 1055
  (let ((file-name-coding-system nnmail-pathname-coding-system))
      (with-temp-file (if dir
1056
			  (expand-file-name ".agentview" dir)
1057 1058 1059 1060 1061 1062 1063
			(gnus-agent-article-name ".agentview" group))
	(princ (setq gnus-agent-article-alist
		     (nconc gnus-agent-article-alist
			    (mapcar (lambda (article) (cons article state))
				    articles)))
	       (current-buffer))
	(insert "\n"))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1064 1065

(defun gnus-agent-article-name (article group)
1066 1067 1068 1069
  (expand-file-name (if (stringp article) article (string-to-number article))
		    (file-name-as-directory
		     (expand-file-name (gnus-agent-group-path group)
				       (gnus-agent-directory)))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1070

1071 1072 1073 1074 1075
(defun gnus-agent-batch-confirmation (msg)
  "Show error message and return t."
  (gnus-message 1 msg)
  t)

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1076 1077 1078 1079 1080
;;;###autoload
(defun gnus-agent-batch-fetch ()
  "Start Gnus and fetch session."
  (interactive)
  (gnus)
1081 1082
  (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
    (gnus-agent-fetch-session))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095
  (gnus-group-exit))

(defun gnus-agent-fetch-session ()
  "Fetch all articles and headers that are eligible for fetching."
  (interactive)
  (unless gnus-agent-covered-methods
    (error "No servers are covered by the Gnus agent"))
  (unless gnus-plugged
    (error "Can't fetch articles while Gnus is unplugged"))
  (let ((methods gnus-agent-covered-methods)
	groups group gnus-command-method)
    (save-excursion
      (while methods
1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108
	(condition-case err
	    (progn
	      (setq gnus-command-method (car methods))
	      (when (or (gnus-server-opened gnus-command-method)
			(gnus-open-server gnus-command-method))
		(setq groups (gnus-groups-from-server (car methods)))
		(gnus-agent-with-fetch
		  (while (setq group (pop groups))
		    (when (<= (gnus-group-level group) gnus-agent-handle-level)
		      (gnus-agent-fetch-group-1 group gnus-command-method))))))
	  (error 
	   (unless (funcall gnus-agent-confirmation-function
			    (format "Error (%s).  Continue? " err))
1109
	     (error "Cannot fetch articles into the Gnus agent")))
1110 1111 1112 1113
	  (quit 
	   (unless (funcall gnus-agent-confirmation-function
			    (format "Quit (%s).  Continue? " err))
	     (signal 'quit "Cannot fetch articles into the Gnus agent."))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1114 1115 1116 1117 1118 1119
	(pop methods))
      (gnus-message 6 "Finished fetching articles into the Gnus agent"))))

(defun gnus-agent-fetch-group-1 (group method)
  "Fetch GROUP."
  (let ((gnus-command-method method)
1120
	(gnus-newsgroup-name group)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1121 1122 1123
	gnus-newsgroup-dependencies gnus-newsgroup-headers
	gnus-newsgroup-scored gnus-headers gnus-score
	gnus-use-cache articles arts
1124 1125 1126 1127 1128 1129 1130 1131 1132
	category predicate info marks score-param
	(gnus-summary-expunge-below gnus-summary-expunge-below)
	(gnus-summary-mark-below gnus-summary-mark-below)
	(gnus-orphan-score gnus-orphan-score)
	;; Maybe some other gnus-summary local variables should also
	;; be put here.
	)
    (unless (gnus-check-group group)
      (error "Can't open server for %s" group))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1133 1134
    ;; Fetch headers.
    (when (and (or (gnus-active group) (gnus-activate-group group))
1135
	       (setq articles (gnus-agent-fetch-headers group))
1136
	       (let ((nntp-server-buffer gnus-agent-overview-buffer))
1137 1138 1139
		 ;; Parse them and see which articles we want to fetch.
		 (setq gnus-newsgroup-dependencies
		       (make-vector (length articles) 0))
1140 1141 1142
		 (setq gnus-newsgroup-headers
		       (gnus-get-newsgroup-headers-xover articles nil nil 
							 group))
1143 1144 1145
		 ;; `gnus-agent-overview-buffer' may be killed for
		 ;; timeout reason.  If so, recreate it.
		 (gnus-agent-create-buffer)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1146 1147 1148
      (setq category (gnus-group-category group))
      (setq predicate
	    (gnus-get-predicate
1149
	     (or (gnus-group-find-parameter group 'agent-predicate t)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1150
		 (cadr category))))
1151 1152 1153 1154 1155
      (if (memq (caaddr predicate) '(gnus-agent-true gnus-agent-false))
	  ;; Simple implementation
	  (setq arts
		(and (eq (caaddr predicate) 'gnus-agent-true) articles))
	(setq arts nil)
1156
	(setq score-param
1157 1158 1159 1160 1161 1162 1163 1164 1165 1166
	      (or (gnus-group-get-parameter group 'agent-score t)
		  (caddr category)))
	;; Translate score-param into real one
	(cond
	 ((not score-param))
	 ((eq score-param 'file)
	  (setq score-param (gnus-all-score-files group)))
	 ((stringp (car score-param)))
	 (t
	  (setq score-param (list (list score-param)))))
1167 1168 1169 1170 1171 1172 1173 1174 1175 1176
	(when score-param
	  (gnus-score-headers score-param))
	(while (setq gnus-headers (pop gnus-newsgroup-headers))
	  (setq gnus-score
		(or (cdr (assq (mail-header-number gnus-headers)
			       gnus-newsgroup-scored))
		    gnus-summary-default-score))
	  (when (funcall predicate)
	    (push (mail-header-number gnus-headers)
		  arts))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186
      ;; Fetch the articles.
      (when arts
	(gnus-agent-fetch-articles group arts)))
    ;; Perhaps we have some additional articles to fetch.
    (setq arts (assq 'download (gnus-info-marks
				(setq info (gnus-get-info group)))))
    (when (cdr arts)
      (gnus-agent-fetch-articles
       group (gnus-uncompress-range (cdr arts)))
      (setq marks (delq arts (gnus-info-marks info)))
1187 1188 1189 1190 1191
      (gnus-info-set-marks info marks)
      (gnus-dribble-enter
       (concat "(gnus-group-set-info '"
	       (gnus-prin1-to-string info)
	       ")")))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292

;;;
;;; Agent Category Mode
;;;

(defvar gnus-category-mode-hook nil
  "Hook run in `gnus-category-mode' buffers.")

(defvar gnus-category-line-format "     %(%20c%): %g\n"
  "Format of category lines.")

(defvar gnus-category-mode-line-format "Gnus: %%b"
  "The format specification for the category mode line.")

(defvar gnus-agent-short-article 100
  "Articles that have fewer lines than this are short.")

(defvar gnus-agent-long-article 200
  "Articles that have more lines than this are long.")

(defvar gnus-agent-low-score 0
  "Articles that have a score lower than this have a low score.")

(defvar gnus-agent-high-score 0
  "Articles that have a score higher than this have a high score.")


;;; Internal variables.

(defvar gnus-category-buffer "*Agent Category*")

(defvar gnus-category-line-format-alist
  `((?c gnus-tmp-name ?s)
    (?g gnus-tmp-groups ?d)))

(defvar gnus-category-mode-line-format-alist
  `((?u user-defined ?s)))

(defvar gnus-category-line-format-spec nil)
(defvar gnus-category-mode-line-format-spec nil)

(defvar gnus-category-mode-map nil)
(put 'gnus-category-mode 'mode-class 'special)

(unless gnus-category-mode-map
  (setq gnus-category-mode-map (make-sparse-keymap))
  (suppress-keymap gnus-category-mode-map)

  (gnus-define-keys gnus-category-mode-map
    "q" gnus-category-exit
    "k" gnus-category-kill
    "c" gnus-category-copy
    "a" gnus-category-add
    "p" gnus-category-edit-predicate
    "g" gnus-category-edit-groups
    "s" gnus-category-edit-score
    "l" gnus-category-list

    "\C-c\C-i" gnus-info-find-node
    "\C-c\C-b" gnus-bug))

(defvar gnus-category-menu-hook nil
  "*Hook run after the creation of the menu.")

(defun gnus-category-make-menu-bar ()
  (gnus-turn-off-edit-menu 'category)
  (unless (boundp 'gnus-category-menu)
    (easy-menu-define
     gnus-category-menu gnus-category-mode-map ""
     '("Categories"
       ["Add" gnus-category-add t]
       ["Kill" gnus-category-kill t]
       ["Copy" gnus-category-copy t]
       ["Edit predicate" gnus-category-edit-predicate t]
       ["Edit score" gnus-category-edit-score t]
       ["Edit groups" gnus-category-edit-groups t]
       ["Exit" gnus-category-exit t]))

    (gnus-run-hooks 'gnus-category-menu-hook)))

(defun gnus-category-mode ()
  "Major mode for listing and editing agent categories.

All normal editing commands are switched off.
\\<gnus-category-mode-map>
For more in-depth information on this mode, read the manual
(`\\[gnus-info-find-node]').

The following commands are available:

\\{gnus-category-mode-map}"
  (interactive)
  (when (gnus-visual-p 'category-menu 'menu)
    (gnus-category-make-menu-bar))
  (kill-all-local-variables)
  (gnus-simplify-mode-line)
  (setq major-mode 'gnus-category-mode)
  (setq mode-name "Category")
  (gnus-set-default-directory)
  (setq mode-line-process nil)
  (use-local-map gnus-category-mode-map)
1293
  (buffer-disable-undo)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349
  (setq truncate-lines t)
  (setq buffer-read-only t)
  (gnus-run-hooks 'gnus-category-mode-hook))

(defalias 'gnus-category-position-point 'gnus-goto-colon)

(defun gnus-category-insert-line (category)
  (let* ((gnus-tmp-name (car category))
	 (gnus-tmp-groups (length (cadddr category))))
    (beginning-of-line)
    (gnus-add-text-properties
     (point)
     (prog1 (1+ (point))
       ;; Insert the text.
       (eval gnus-category-line-format-spec))
     (list 'gnus-category gnus-tmp-name))))

(defun gnus-enter-category-buffer ()
  "Go to the Category buffer."
  (interactive)
  (gnus-category-setup-buffer)
  (gnus-configure-windows 'category)
  (gnus-category-prepare))

(defun gnus-category-setup-buffer ()
  (unless (get-buffer gnus-category-buffer)
    (save-excursion
      (set-buffer (gnus-get-buffer-create gnus-category-buffer))
      (gnus-category-mode))))

(defun gnus-category-prepare ()
  (gnus-set-format 'category-mode)
  (gnus-set-format 'category t)
  (let ((alist gnus-category-alist)
	(buffer-read-only nil))
    (erase-buffer)
    (while alist
      (gnus-category-insert-line (pop alist)))
    (goto-char (point-min))
    (gnus-category-position-point)))

(defun gnus-category-name ()
  (or (get-text-property (gnus-point-at-bol) 'gnus-category)
      (error "No category on the current line")))

(defun gnus-category-read ()
  "Read the category alist."
  (setq gnus-category-alist
	(or (gnus-agent-read-file
	     (nnheader-concat gnus-agent-directory "lib/categories"))
	    (list (list 'default 'short nil nil)))))

(defun gnus-category-write ()
  "Write the category alist."
  (setq gnus-category-predicate-cache nil
	gnus-category-group-cache nil)
1350 1351
  (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
  (with-temp-file (nnheader-concat gnus-agent-directory "lib/categories")
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1352 1353 1354 1355 1356 1357 1358 1359 1360
    (prin1 gnus-category-alist (current-buffer))))

(defun gnus-category-edit-predicate (category)
  "Edit the predicate for CATEGORY."
  (interactive (list (gnus-category-name)))
  (let ((info (assq category gnus-category-alist)))
    (gnus-edit-form
     (cadr info) (format "Editing the predicate for category %s" category)
     `(lambda (predicate)
1361
	(setcar (cdr (assq ',category gnus-category-alist)) predicate)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372
	(gnus-category-write)
	(gnus-category-list)))))

(defun gnus-category-edit-score (category)
  "Edit the score expression for CATEGORY."
  (interactive (list (gnus-category-name)))
  (let ((info (assq category gnus-category-alist)))
    (gnus-edit-form
     (caddr info)
     (format "Editing the score expression for category %s" category)
     `(lambda (groups)
1373
	(setcar (cddr (assq ',category gnus-category-alist)) groups)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1374 1375 1376 1377 1378 1379 1380 1381 1382 1383
	(gnus-category-write)
	(gnus-category-list)))))

(defun gnus-category-edit-groups (category)
  "Edit the group list for CATEGORY."
  (interactive (list (gnus-category-name)))
  (let ((info (assq category gnus-category-alist)))
    (gnus-edit-form
     (cadddr info) (format "Editing the group list for category %s" category)
     `(lambda (groups)
1384
	(setcar (nthcdr 3 (assq ',category gnus-category-alist)) groups)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1385 1386 1387 1388 1389 1390 1391 1392 1393
	(gnus-category-write)
	(gnus-category-list)))))

(defun gnus-category-kill (category)
  "Kill the current category."
  (interactive (list (gnus-category-name)))
  (let ((info (assq category gnus-category-alist))
	(buffer-read-only nil))
    (gnus-delete-line)
1394 1395
    (setq gnus-category-alist (delq info gnus-category-alist))
    (gnus-category-write)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411

(defun gnus-category-copy (category to)
  "Copy the current category."
  (interactive (list (gnus-category-name) (intern (read-string "New name: "))))
  (let ((info (assq category gnus-category-alist)))
    (push (list to (gnus-copy-sequence (cadr info))
		(gnus-copy-sequence (caddr info)) nil)
	  gnus-category-alist)
    (gnus-category-write)
    (gnus-category-list)))

(defun gnus-category-add (category)
  "Create a new category."
  (interactive "SCategory name: ")
  (when (assq category gnus-category-alist)
    (error "Category %s already exists" category))
1412
  (push (list category 'false nil nil)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524
	gnus-category-alist)
  (gnus-category-write)
  (gnus-category-list))

(defun gnus-category-list ()
  "List all categories."
  (interactive)
  (gnus-category-prepare))

(defun gnus-category-exit ()
  "Return to the group buffer."
  (interactive)
  (kill-buffer (current-buffer))
  (gnus-configure-windows 'group t))

;; To avoid having 8-bit characters in the source file.
(defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))

(defvar gnus-category-predicate-alist
  '((spam . gnus-agent-spam-p)
    (short . gnus-agent-short-p)
    (long . gnus-agent-long-p)
    (low . gnus-agent-low-scored-p)
    (high . gnus-agent-high-scored-p)
    (true . gnus-agent-true)
    (false . gnus-agent-false))
  "Mapping from short score predicate symbols to predicate functions.")

(defun gnus-agent-spam-p ()
  "Say whether an article is spam or not."
  (unless gnus-agent-spam-hashtb
    (setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
  (if (not (equal (mail-header-references gnus-headers) ""))
      nil
    (let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
      (prog1
	  (gnus-gethash string gnus-agent-spam-hashtb)
	(gnus-sethash string t gnus-agent-spam-hashtb)))))

(defun gnus-agent-short-p ()
  "Say whether an article is short or not."
  (< (mail-header-lines gnus-headers) gnus-agent-short-article))

(defun gnus-agent-long-p ()
  "Say whether an article is long or not."
  (> (mail-header-lines gnus-headers) gnus-agent-long-article))

(defun gnus-agent-low-scored-p ()
  "Say whether an article has a low score or not."
  (< gnus-score gnus-agent-low-score))

(defun gnus-agent-high-scored-p ()
  "Say whether an article has a high score or not."
  (> gnus-score gnus-agent-high-score))

(defun gnus-category-make-function (cat)
  "Make a function from category CAT."
  `(lambda () ,(gnus-category-make-function-1 cat)))

(defun gnus-agent-true ()
  "Return t."
  t)

(defun gnus-agent-false ()
  "Return nil."
  nil)

(defun gnus-category-make-function-1 (cat)
  "Make a function from category CAT."
  (cond
   ;; Functions are just returned as is.
   ((or (symbolp cat)
	(gnus-functionp cat))
    `(,(or (cdr (assq cat gnus-category-predicate-alist))
	   cat)))
   ;; More complex category.
   ((consp cat)
    `(,(cond
	((memq (car cat) '(& and))
	 'and)
	((memq (car cat) '(| or))
	 'or)
	((memq (car cat) gnus-category-not)
	 'not))
      ,@(mapcar 'gnus-category-make-function-1 (cdr cat))))
   (t
    (error "Unknown category type: %s" cat))))

(defun gnus-get-predicate (predicate)
  "Return the predicate for CATEGORY."
  (or (cdr (assoc predicate gnus-category-predicate-cache))
      (cdar (push (cons predicate
			(gnus-category-make-function predicate))
		  gnus-category-predicate-cache))))

(defun gnus-group-category (group)
  "Return the category GROUP belongs to."
  (unless gnus-category-group-cache
    (setq gnus-category-group-cache (gnus-make-hashtable 1000))
    (let ((cs gnus-category-alist)
	  groups cat)
      (while (setq cat (pop cs))
	(setq groups (cadddr cat))
	(while groups
	  (gnus-sethash (pop groups) cat gnus-category-group-cache)))))
  (or (gnus-gethash group gnus-category-group-cache)
      (assq 'default gnus-category-alist)))

(defun gnus-agent-expire ()
  "Expire all old articles."
  (interactive)
  (let ((methods gnus-agent-covered-methods)
1525
	(day (- (time-to-days (current-time)) gnus-agent-expire-days))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1526 1527
	gnus-command-method sym group articles
	history overview file histories elem art nov-file low info
1528
	unreads marked article orig lowest highest)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1529 1530 1531
    (save-excursion
      (setq overview (gnus-get-buffer-create " *expire overview*"))
      (while (setq gnus-command-method (pop methods))
1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602
	(when (file-exists-p (gnus-agent-lib-file "active"))
	  (with-temp-buffer
	    (nnheader-insert-file-contents (gnus-agent-lib-file "active"))
	    (gnus-active-to-gnus-format 
	     gnus-command-method
	     (setq orig (gnus-make-hashtable
			 (count-lines (point-min) (point-max))))))
	  (let ((expiry-hashtb (gnus-make-hashtable 1023)))
	    (gnus-agent-open-history)
	    (set-buffer
	     (setq gnus-agent-current-history
		   (setq history (gnus-agent-history-buffer))))
	    (goto-char (point-min))
	    (when (> (buffer-size) 1)
	      (goto-char (point-min))
	      (while (not (eobp))
		(skip-chars-forward "^\t")
		(if (> (read (current-buffer)) day)
		    ;; New article; we don't expire it.
		    (forward-line 1)
		  ;; Old article.  Schedule it for possible nuking.
		  (while (not (eolp))
		    (setq sym (let ((obarray expiry-hashtb) s)
				(setq s (read (current-buffer)))
				(if (stringp s) (intern s) s)))
		    (if (boundp sym)
			(set sym (cons (cons (read (current-buffer)) (point))
				       (symbol-value sym)))
		      (set sym (list (cons (read (current-buffer)) (point)))))
		    (skip-chars-forward " "))
		  (forward-line 1)))
	      ;; We now have all articles that can possibly be expired.
	      (mapatoms
	       (lambda (sym)
		 (setq group (symbol-name sym)
		       articles (sort (symbol-value sym) 'car-less-than-car)
		       low (car (gnus-active group))
		       info (gnus-get-info group)
		       unreads (ignore-errors
				 (gnus-list-of-unread-articles group))
		       marked (nconc
			       (gnus-uncompress-range
				(cdr (assq 'tick (gnus-info-marks info))))
			       (gnus-uncompress-range
				(cdr (assq 'dormant
					   (gnus-info-marks info)))))
		       nov-file (gnus-agent-article-name ".overview" group)
		       lowest nil
		       highest nil)
		 (gnus-agent-load-alist group)
		 (gnus-message 5 "Expiring articles in %s" group)
		 (set-buffer overview)
		 (erase-buffer)
		 (when (file-exists-p nov-file)
		   (nnheader-insert-file-contents nov-file))
		 (goto-char (point-min))
		 (setq article 0)
		 (while (setq elem (