gnus-agent.el 148 KB
Newer Older
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1
;;; gnus-agent.el --- unplugged support for Gnus
2 3
;; Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
;;        Free Software Foundation, Inc.
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
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

;; 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)
29
(require 'nnmail)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
30 31
(require 'nnvirtual)
(require 'gnus-sum)
32
(require 'gnus-score)
33 34
(require 'gnus-srvr)
(require 'gnus-util)
35
(eval-when-compile
36 37 38 39
  (if (featurep 'xemacs)
      (require 'itimer)
    (require 'timer))
  (require 'cl))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
40

41 42 43 44 45
(eval-and-compile
  (autoload 'gnus-server-update-server "gnus-srvr")
  (autoload 'gnus-agent-customize-category "gnus-cus")
)

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
(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)

61 62
(defcustom gnus-agent-fetched-hook nil
  "Hook run when finished fetching articles."
63
  :version "21.4"
64 65 66
  :group 'gnus-agent
  :type 'hook)

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
67 68 69 70 71 72
(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
73 74
  "Read articles older than this will be expired.
If you wish to disable Agent expiring, see `gnus-agent-enable-expiration'."
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
75
  :group 'gnus-agent
76
  :type '(number :tag "days"))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
77 78 79 80 81 82 83 84 85 86 87 88

(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)

89 90 91 92
;; Extracted from gnus-xmas-redefine in order to preserve user settings
(when (featurep 'xemacs)
  (add-hook 'gnus-agent-group-mode-hook 'gnus-xmas-agent-group-menu-add))

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
93 94 95 96 97
(defcustom gnus-agent-summary-mode-hook nil
  "Hook run in Agent summary minor modes."
  :group 'gnus-agent
  :type 'hook)

98 99 100 101
;; Extracted from gnus-xmas-redefine in order to preserve user settings
(when (featurep 'xemacs)
  (add-hook 'gnus-agent-summary-mode-hook 'gnus-xmas-agent-summary-menu-add))

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
102 103 104 105 106
(defcustom gnus-agent-server-mode-hook nil
  "Hook run in Agent summary minor modes."
  :group 'gnus-agent
  :type 'hook)

107 108 109 110
;; Extracted from gnus-xmas-redefine in order to preserve user settings
(when (featurep 'xemacs)
  (add-hook 'gnus-agent-server-mode-hook 'gnus-xmas-agent-server-menu-add))

111 112
(defcustom gnus-agent-confirmation-function 'y-or-n-p
  "Function to confirm when error happens."
113
  :version "21.1"
114 115
  :group 'gnus-agent
  :type 'function)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
116

117 118 119
(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."
120
  :version "21.1"
121 122 123 124 125
  :type '(choice (const :tag "Always" t)
		 (const :tag "Never" nil)
		 (const :tag "Ask" ask))
  :group 'gnus-agent)

126 127 128
(defcustom gnus-agent-go-online 'ask
  "Indicate if offline servers go online when you plug in.
If this is `ask' the hook will query the user."
129
  :version "21.3"
130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181
  :type '(choice (const :tag "Always" t)
		 (const :tag "Never" nil)
		 (const :tag "Ask" ask))
  :group 'gnus-agent)

(defcustom gnus-agent-mark-unread-after-downloaded t
  "Indicate whether to mark articles unread after downloaded."
  :version "21.1"
  :type 'boolean
  :group 'gnus-agent)

(defcustom gnus-agent-download-marks '(download)
  "Marks for downloading."
  :version "21.1"
  :type '(repeat (symbol :tag "Mark"))
  :group 'gnus-agent)

(defcustom gnus-agent-consider-all-articles nil
  "When non-nil, the agent will let the agent predicate decide
whether articles need to be downloaded or not, for all articles.  When
nil, the default, the agent will only let the predicate decide
whether unread articles are downloaded or not.  If you enable this,
groups with large active ranges may open slower and you may also want
to look into the agent expiry settings to block the expiration of
read articles as they would just be downloaded again."
  :version "21.4"
  :type 'boolean
  :group 'gnus-agent)

(defcustom gnus-agent-max-fetch-size 10000000 ;; 10 Mb
  "Chunk size for `gnus-agent-fetch-session'.
The function will split its article fetches into chunks smaller than
this limit."
  :group 'gnus-agent
  :type 'integer)

(defcustom gnus-agent-enable-expiration 'ENABLE
  "The default expiration state for each group.
When set to ENABLE, the default, `gnus-agent-expire' will expire old
contents from a group's local storage.  This value may be overridden
to disable expiration in specific categories, topics, and groups.  Of
course, you could change gnus-agent-enable-expiration to DISABLE then
enable expiration per categories, topics, and groups."
  :group 'gnus-agent
  :type '(radio (const :format "Enable " ENABLE)
                (const :format "Disable " DISABLE)))

(defcustom gnus-agent-expire-unagentized-dirs t
  "*Whether expiration should expire in unagentized directories.
Have gnus-agent-expire scan the directories under
\(gnus-agent-directory) for groups that are no longer agentized.
When found, offer to remove them."
182
  :version "21.4"
183 184 185 186 187 188 189
  :type 'boolean
  :group 'gnus-agent)

(defcustom gnus-agent-auto-agentize-methods '(nntp nnimap)
  "Initially, all servers from these methods are agentized.
The user may remove or add servers using the Server buffer.
See Info node `(gnus)Server Buffer'."
190
  :version "21.4"
191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208
  :type '(repeat symbol)
  :group 'gnus-agent)

(defcustom gnus-agent-queue-mail t
  "Whether and when outgoing mail should be queued by the agent.
When `always', always queue outgoing mail.  When nil, never
queue.  Otherwise, queue if and only if unplugged."
  :group 'gnus-agent
  :type '(radio (const :format "Always" always)
		(const :format "Never" nil)
		(const :format "When plugged" t)))

(defcustom gnus-agent-prompt-send-queue nil
  "If non-nil, `gnus-group-send-queue' will prompt if called when
unplugged."
  :group 'gnus-agent
  :type 'boolean)

209
;;; Internal variables
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
210 211 212

(defvar gnus-agent-history-buffers nil)
(defvar gnus-agent-buffer-alist nil)
213 214 215 216 217 218 219 220 221 222 223
(defvar gnus-agent-article-alist nil
  "An assoc list identifying the articles whose headers have been fetched.  
If successfully fetched, these headers will be stored in the group's overview
file.  The key of each assoc pair is the article ID, the value of each assoc
pair is a flag indicating whether the identified article has been downloaded
\(gnus-agent-fetch-articles sets the value to the day of the download).
NOTES:
1) The last element of this list can not be expired as some 
   routines (for example, get-agent-fetch-headers) use the last
   value to track which articles have had their headers retrieved.
2) The function `gnus-agent-regenerate' may destructively modify the value.")
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
224 225 226 227 228 229 230 231 232
(defvar gnus-agent-group-alist 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)
233
(defvar gnus-agent-file-coding-system 'raw-text)
234
(defvar gnus-agent-file-loading-cache nil)
235

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
236 237 238 239 240 241 242 243 244 245 246 247
;; Dynamic variables
(defvar gnus-headers)
(defvar gnus-score)

;;;
;;; Setup
;;;

(defun gnus-open-agent ()
  (setq gnus-agent t)
  (gnus-agent-read-servers)
  (gnus-category-read)
248
  (gnus-agent-create-buffer)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
249 250 251 252
  (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))

253 254 255 256 257 258 259 260 261
(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
262 263 264
(gnus-add-shutdown 'gnus-close-agent 'gnus)

(defun gnus-close-agent ()
265
  (setq gnus-category-predicate-cache nil
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
266 267 268 269 270 271 272 273 274 275
	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."
276
  (with-temp-buffer
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
277 278 279 280 281 282 283 284 285 286 287 288
    (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 ()
289
  "The name of the Gnus agent directory."
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
290 291 292 293
  (nnheader-concat gnus-agent-directory
		   (nnheader-translate-file-chars (gnus-agent-method)) "/"))

(defun gnus-agent-lib-file (file)
294
  "The full name of the Gnus agent library FILE."
295 296 297
  (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
298

299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404
(defun gnus-agent-cat-set-property (category property value)
  (if value
      (setcdr (or (assq property category)
              (let ((cell (cons property nil)))
                    (setcdr category (cons cell (cdr category)))
                    cell)) value)
    (let ((category category))
      (while (cond ((eq property (caadr category))
                    (setcdr category (cddr category))
                    nil)
                   (t
                    (setq category (cdr category)))))))
  category)

(eval-when-compile
  (defmacro gnus-agent-cat-defaccessor (name prop-name)
    "Define accessor and setter methods for manipulating a list of the form
\(NAME (PROPERTY1 VALUE1) ... (PROPERTY_N VALUE_N)).
Given the call (gnus-agent-cat-defaccessor func PROPERTY1), the list may be
manipulated as follows:
  (func LIST): Returns VALUE1
  (setf (func LIST) NEW_VALUE1): Replaces VALUE1 with NEW_VALUE1."
    `(progn (defmacro ,name (category)
              (list (quote cdr) (list (quote assq)
                                      (quote (quote ,prop-name)) category)))

            (define-setf-method ,name (category)
              (let* ((--category--temp-- (make-symbol "--category--"))
                     (--value--temp-- (make-symbol "--value--")))
                (list (list --category--temp--) ; temporary-variables
                      (list category)   ; value-forms
                      (list --value--temp--) ; store-variables
                      (let* ((category --category--temp--) ; store-form
                             (value --value--temp--))
                        (list (quote gnus-agent-cat-set-property)
                              category
                              (quote (quote ,prop-name))
                              value))
                      (list (quote ,name) --category--temp--) ; access-form
                      )))))
  )

(defmacro gnus-agent-cat-name (category)
  `(car ,category))

(gnus-agent-cat-defaccessor
 gnus-agent-cat-days-until-old             agent-days-until-old)
(gnus-agent-cat-defaccessor
 gnus-agent-cat-enable-expiration          agent-enable-expiration)
(gnus-agent-cat-defaccessor
 gnus-agent-cat-groups                     agent-groups)
(gnus-agent-cat-defaccessor
 gnus-agent-cat-high-score                 agent-high-score)
(gnus-agent-cat-defaccessor
 gnus-agent-cat-length-when-long           agent-length-when-long)
(gnus-agent-cat-defaccessor
 gnus-agent-cat-length-when-short          agent-length-when-short)
(gnus-agent-cat-defaccessor
 gnus-agent-cat-low-score                  agent-low-score)
(gnus-agent-cat-defaccessor
 gnus-agent-cat-predicate                  agent-predicate)
(gnus-agent-cat-defaccessor
 gnus-agent-cat-score-file                 agent-score-file)
(gnus-agent-cat-defaccessor
 gnus-agent-cat-enable-undownloaded-faces agent-enable-undownloaded-faces)

(eval-and-compile
  (defsetf gnus-agent-cat-groups (category) (groups)
    (list 'gnus-agent-set-cat-groups category groups)))

(defun gnus-agent-set-cat-groups (category groups)
  (unless (eq groups 'ignore)
    (let ((new-g groups)
          (old-g (gnus-agent-cat-groups category)))
      (cond ((eq new-g old-g)
             ;; gnus-agent-add-group is fiddling with the group
             ;; list. Still, Im done.
             nil
             )
            ((eq new-g (cdr old-g))
             ;; gnus-agent-add-group is fiddling with the group list
             (setcdr (or (assq 'agent-groups category)
                         (let ((cell (cons 'agent-groups nil)))
                           (setcdr category (cons cell (cdr category)))
                           cell)) new-g))
            (t
             (let ((groups groups))
               (while groups
                 (let* ((group        (pop groups))
                        (old-category (gnus-group-category group)))
                   (if (eq category old-category)
                       nil
                     (setf (gnus-agent-cat-groups old-category)
                           (delete group (gnus-agent-cat-groups
                                          old-category))))))
               ;; Purge cache as preceeding loop invalidated it.
               (setq gnus-category-group-cache nil))

             (setcdr (or (assq 'agent-groups category)
                         (let ((cell (cons 'agent-groups nil)))
                           (setcdr category (cons cell (cdr category)))
                           cell)) groups))))))

(defsubst gnus-agent-cat-make (name &optional default-agent-predicate)
  (list name `(agent-predicate . ,(or default-agent-predicate 'false))))

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
405 406 407 408
;;; Fetching setup functions.

(defun gnus-agent-start-fetch ()
  "Initialize data structures for efficient fetching."
409
  (gnus-agent-create-buffer))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
410 411 412 413 414 415 416 417 418 419 420

(defun gnus-agent-stop-fetch ()
  "Save all data structures and clean up."
  (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
421
       (let ((gnus-agent-fetching t))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
422 423 424 425 426 427 428
	 (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))

429 430 431 432 433 434 435
(defmacro gnus-agent-append-to-list (tail value)
  `(setq ,tail (setcdr ,tail (cons ,value nil))))

(defmacro gnus-agent-message (level &rest args)
  `(if (<= ,level gnus-verbose)
       (message ,@args)))

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464
;;;
;;; 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)
465 466 467 468 469 470 471
      (let ((init-plugged gnus-plugged)
            (gnus-agent-go-online nil))
        ;; g-a-t-p does nothing when gnus-plugged isn't changed.
        ;; Therefore, make certain that the current value does not
        ;; match the desired initial value.
        (setq gnus-plugged :unknown)
        (gnus-agent-toggle-plugged init-plugged)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
472 473 474 475 476 477 478 479 480
    (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
481
  "JY" gnus-agent-synchronize-flags
482
  "JS" gnus-group-send-queue
483
  "Ja" gnus-agent-add-group
484 485
  "Jr" gnus-agent-remove-group
  "Jo" gnus-agent-toggle-group-plugged)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
486 487 488 489 490 491 492

(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]
493
       ["Toggle group plugged" gnus-agent-toggle-group-plugged t]
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
494
       ["List categories" gnus-enter-category-buffer t]
495 496 497
       ["Add (current) group to category" gnus-agent-add-group t]
       ["Remove (current) group from category" gnus-agent-remove-group t]
       ["Send queue" gnus-group-send-queue gnus-plugged]
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
498 499
       ("Fetch"
	["All" gnus-agent-fetch-session gnus-plugged]
500 501 502
	["Group" gnus-agent-fetch-group gnus-plugged])
       ["Synchronize flags" gnus-agent-synchronize-flags t]
       ))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
503 504 505 506

(defvar gnus-agent-summary-mode-map (make-sparse-keymap))
(gnus-define-keys gnus-agent-summary-mode-map
  "Jj" gnus-agent-toggle-plugged
507 508 509
  "Ju" gnus-agent-summary-fetch-group
  "JS" gnus-agent-fetch-group
  "Js" gnus-agent-summary-fetch-series
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
510 511 512 513 514 515 516 517 518 519 520 521 522 523
  "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]
524
       ["Fetch downloadable" gnus-agent-summary-fetch-group t]
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541
       ["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]))))

542 543 544 545 546 547 548 549
(defun gnus-agent-make-mode-line-string (string mouse-button mouse-func)
  (if (and (fboundp 'propertize)
	   (fboundp 'make-mode-line-mouse-map))
      (propertize string 'local-map
		  (make-mode-line-mouse-map mouse-button mouse-func))
    string))

(defun gnus-agent-toggle-plugged (set-to)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
550 551
  "Toggle whether Gnus is unplugged or not."
  (interactive (list (not gnus-plugged)))
552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570
  (cond ((eq set-to gnus-plugged)
         nil)
        (set-to
         (setq gnus-plugged set-to)
         (gnus-run-hooks 'gnus-agent-plugged-hook)
         (setcar (cdr gnus-agent-mode-status)
                 (gnus-agent-make-mode-line-string " Plugged"
                                                   'mouse-2
                                                   'gnus-agent-toggle-plugged))
         (gnus-agent-go-online gnus-agent-go-online)
         (gnus-agent-possibly-synchronize-flags))
        (t
         (gnus-agent-close-connections)
         (setq gnus-plugged set-to)
         (gnus-run-hooks 'gnus-agent-unplugged-hook)
         (setcar (cdr gnus-agent-mode-status)
                 (gnus-agent-make-mode-line-string " Unplugged"
                                                   'mouse-2
                                                   'gnus-agent-toggle-plugged))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
571 572
  (set-buffer-modified-p t))

573 574 575 576 577 578 579 580 581 582
(defmacro gnus-agent-while-plugged (&rest body)
  `(let ((original-gnus-plugged gnus-plugged))
    (unwind-protect
        (progn (gnus-agent-toggle-plugged t)
               ,@body)
      (gnus-agent-toggle-plugged original-gnus-plugged))))

(put 'gnus-agent-while-plugged 'lisp-indent-function 0)
(put 'gnus-agent-while-plugged 'edebug-form-spec '(body))

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
583 584
(defun gnus-agent-close-connections ()
  "Close all methods covered by the Gnus agent."
585
  (let ((methods (gnus-agent-covered-methods)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602
    (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))

603 604 605 606 607 608 609
;;;###autoload
(defun gnus-slave-unplugged (&optional arg)
  "Read news as a slave unplugged."
  (interactive "P")
  (setq gnus-plugged nil)
  (gnus arg nil 'slave))

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
610 611 612 613
;;;###autoload
(defun gnus-agentize ()
  "Allow Gnus to be an offline newsreader.

614 615 616
The gnus-agentize function is now called internally by gnus when
gnus-agent is set.  If you wish to avoid calling gnus-agentize,
customize gnus-agent to nil.
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
617

618 619 620
This will modify the `gnus-setup-news-hook', and
`message-send-mail-real-function' variables, and install the Gnus agent
minor mode in all Gnus buffers."
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
621 622 623 624
  (interactive)
  (gnus-open-agent)
  (add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
  (unless gnus-agent-send-mail-function
625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651
    (setq gnus-agent-send-mail-function
	  (or message-send-mail-real-function
	      message-send-mail-function)
	  message-send-mail-real-function 'gnus-agent-send-mail))

  ;; If the servers file doesn't exist, auto-agentize some servers and
  ;; save the servers file so this auto-agentizing isn't invoked
  ;; again.
  (unless (file-exists-p (nnheader-concat gnus-agent-directory "lib/servers"))
    (gnus-message 3 "First time agent user, agentizing remote groups...")
    (mapc
     (lambda (server-or-method)
       (let ((method (gnus-server-to-method server-or-method)))
	 (when (memq (car method)
		     gnus-agent-auto-agentize-methods)
	   (push (gnus-method-to-server method)
		 gnus-agent-covered-methods)
	   (setq gnus-agent-method-p-cache nil))))
     (cons gnus-select-method gnus-secondary-select-methods))
    (gnus-agent-write-servers)))

(defun gnus-agent-queue-setup (&optional group-name)
  "Make sure the queue group exists.
Optional arg GROUP-NAME allows to specify another group."
  (unless (gnus-gethash (format "nndraft:%s" (or group-name "queue"))
			gnus-newsrc-hashtb)
    (gnus-request-create-group (or group-name "queue") '(nndraft ""))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
652
    (let ((gnus-level-default-subscribed 1))
653 654
      (gnus-subscribe-group (format "nndraft:%s" (or group-name "queue"))
			    nil '(nndraft "")))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
655
    (gnus-group-set-parameter
656 657
     (format "nndraft:%s" (or group-name "queue"))
     'gnus-dummy '((gnus-draft-mode)))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
658 659

(defun gnus-agent-send-mail ()
660 661
  (if (or (not gnus-agent-queue-mail)
	  (and gnus-plugged (not (eq gnus-agent-queue-mail 'always))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
662 663 664 665 666 667
      (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)
668
    (gnus-request-accept-article "nndraft:queue" nil t t)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
669 670 671

(defun gnus-agent-insert-meta-information (type &optional method)
  "Insert meta-information into the message that says how it's to be posted.
672
TYPE can be either `mail' or `news'.  If the latter, then METHOD can
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
673 674 675 676 677 678 679 680 681 682 683
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))))

684 685 686 687
(defun gnus-agent-restore-gcc ()
  "Restore GCC field from saved header."
  (save-excursion
    (goto-char (point-min))
688 689
    (while (re-search-forward
	    (concat "^" (regexp-quote gnus-agent-gcc-header) ":") nil t)
690 691 692 693 694 695
      (replace-match "Gcc:" 'fixedcase))))

(defun gnus-agent-any-covered-gcc ()
  (save-restriction
    (message-narrow-to-headers)
    (let* ((gcc (mail-fetch-field "gcc" nil t))
696
	   (methods (and gcc
697 698
			 (mapcar 'gnus-inews-group-method
				 (message-unquote-tokens
699
				  (message-tokenize-header
700 701 702
				   gcc " ,")))))
	   covered)
      (while (and (not covered) methods)
703
	(setq covered (gnus-agent-method-p (car methods))
704 705 706
	      methods (cdr methods)))
      covered)))

707
;;;###autoload
708 709 710 711 712 713 714 715 716 717 718 719 720 721
(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
722 723 724 725 726 727 728
;;;
;;; Group mode commands
;;;

(defun gnus-agent-fetch-groups (n)
  "Put all new articles in the current groups into the Agent."
  (interactive "P")
729 730
  (unless gnus-plugged
    (error "Groups can't be fetched when Gnus is unplugged"))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
731 732
  (gnus-group-iterate n 'gnus-agent-fetch-group))

733
(defun gnus-agent-fetch-group (&optional group)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
734 735
  "Put all new articles in GROUP into the Agent."
  (interactive (list (gnus-group-group-name)))
736
  (setq group (or group gnus-newsgroup-name))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
737 738
  (unless group
    (error "No group on the current line"))
739 740 741 742 743 744

  (gnus-agent-while-plugged
    (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)))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760

(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)
761 762 763
	(when (gnus-agent-cat-groups (setq c (gnus-group-category group)))
	  (setf (gnus-agent-cat-groups c)
                (delete group (gnus-agent-cat-groups c))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
764
	(push group groups)))
765 766
    (setf (gnus-agent-cat-groups cat)
          (nconc (gnus-agent-cat-groups cat) groups))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
767 768
    (gnus-category-write)))

769 770 771 772 773 774
(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)
775 776 777
	(when (gnus-agent-cat-groups (setq c (gnus-group-category group)))
	  (setf (gnus-agent-cat-groups c)
                (delete group (gnus-agent-cat-groups c))))))
778 779
    (gnus-category-write)))

780 781 782 783
(defun gnus-agent-synchronize-flags ()
  "Synchronize unplugged flags with servers."
  (interactive)
  (save-excursion
784
    (dolist (gnus-command-method (gnus-agent-covered-methods))
785 786 787 788 789
      (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'."
790 791
  (interactive)
  (save-excursion
792
    (dolist (gnus-command-method (gnus-agent-covered-methods))
793
      (when (file-exists-p (gnus-agent-lib-file "flags"))
794 795 796 797 798 799 800 801 802 803
	(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))
804
	  (gnus-message 1 "Couldn't open server %s" (nth 1 gnus-command-method))
805 806
	(while (not (eobp))
	  (if (null (eval (read (current-buffer))))
807
	      (gnus-delete-line)
808 809 810 811 812 813 814 815 816 817 818
	    (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)
819
		 (gnus-y-or-n-p (format "Synchronize flags on server `%s'? "
820 821
					(cadr method)))))
    (gnus-agent-synchronize-flags-server method)))
822

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
823 824 825 826
;;;
;;; Server mode commands
;;;

827
(defun gnus-agent-add-server ()
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
828
  "Enroll SERVER in the agent program."
829 830 831 832 833 834 835 836 837
  (interactive)
  (let* ((server       (gnus-server-server-name))
         (named-server (gnus-server-named-server))
         (method       (and server
                            (gnus-server-get-method nil server))))
    (unless server
      (error "No server on the current line"))

    (when (gnus-agent-method-p method)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
838
      (error "Server already in the agent program"))
839 840 841 842 843

    (push named-server gnus-agent-covered-methods)

    (setq gnus-agent-method-p-cache nil)
    (gnus-server-update-server server)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
844
    (gnus-agent-write-servers)
845
    (gnus-message 1 "Entered %s into the Agent" server)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
846

847
(defun gnus-agent-remove-server ()
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
848
  "Remove SERVER from the agent program."
849 850 851 852 853 854 855
  (interactive)
  (let* ((server       (gnus-server-server-name))
         (named-server (gnus-server-named-server)))
    (unless server
      (error "No server on the current line"))

    (unless (member named-server gnus-agent-covered-methods)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
856
      (error "Server not in the agent program"))
857 858 859 860 861 862

    (setq gnus-agent-covered-methods 
          (delete named-server gnus-agent-covered-methods)
          gnus-agent-method-p-cache nil)

    (gnus-server-update-server server)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
863
    (gnus-agent-write-servers)
864
    (gnus-message 1 "Removed %s from the agent" server)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
865 866 867

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

  ;; I am called so early in start-up that I can not validate server
  ;; names.  When that is the case, I skip the validation.  That is
  ;; alright as the gnus startup code calls the validate methods
  ;; directly.
  (if gnus-server-alist
      (gnus-agent-read-servers-validate)))

(defun gnus-agent-read-servers-validate ()
  (mapcar (lambda (server-or-method)
            (let* ((server (if (stringp server-or-method)
                               server-or-method
                             (gnus-method-to-server server-or-method)))
                   (method (gnus-server-to-method server)))
              (if method
                  (unless (member server gnus-agent-covered-methods)
                    (push server gnus-agent-covered-methods)
                    (setq gnus-agent-method-p-cache nil))
                (gnus-message 1 "Ignoring disappeared server `%s'" server))))
          (prog1 gnus-agent-covered-methods
            (setq gnus-agent-covered-methods nil))))

(defun gnus-agent-read-servers-validate-native (native-method)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
895
  (setq gnus-agent-covered-methods
896 897 898 899 900
        (mapcar (lambda (method)
                  (if (or (not method)
                          (equal method native-method))
                      "native"
                    method)) gnus-agent-covered-methods)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
901 902 903

(defun gnus-agent-write-servers ()
  "Write the alist of covered servers."
904 905 906 907
  (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")
908 909
      (prin1 gnus-agent-covered-methods
	     (current-buffer)))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950

;;;
;;; 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)
951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970
  "Mark ARTICLE as downloadable.  If UNMARK is nil, article is marked.
When UNMARK is t, the article is unmarked.  For any other value, the
article's mark is toggled."
  (let ((unmark (cond ((eq nil unmark)
		       nil)
		      ((eq t unmark)
		       t)
		      (t
		       (memq article gnus-newsgroup-downloadable)))))
    (when (gnus-summary-goto-subject article nil t)
      (gnus-summary-update-mark
       (if unmark
           (progn
             (setq gnus-newsgroup-downloadable
                   (delq article gnus-newsgroup-downloadable))
             (gnus-article-mark article))
	 (setq gnus-newsgroup-downloadable
	       (gnus-add-to-sorted-list gnus-newsgroup-downloadable article))
	 gnus-downloadable-mark)
       'unread))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
971 972

(defun gnus-agent-get-undownloaded-list ()
973
  "Construct list of articles that have not been downloaded."
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
974
  (let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023
    (when (set (make-local-variable 'gnus-newsgroup-agentized)
               (gnus-agent-method-p gnus-command-method))
      (let* ((alist (gnus-agent-load-alist gnus-newsgroup-name))
             (headers (sort (mapcar (lambda (h)
                                      (mail-header-number h))
                                    gnus-newsgroup-headers) '<))
             (cached (and gnus-use-cache gnus-newsgroup-cached))
             (undownloaded (list nil))
             (tail-undownloaded undownloaded)
             (unfetched (list nil))
             (tail-unfetched unfetched))
	(while (and alist headers)
	  (let ((a (caar alist))
		(h (car headers)))
	    (cond ((< a h)
		   ;; Ignore IDs in the alist that are not being
		   ;; displayed in the summary.
		   (setq alist (cdr alist)))
		  ((> a h)
                   ;; Headers that are not in the alist should be
                   ;; fictious (see nnagent-retrieve-headers); they
                   ;; imply that this article isn't in the agent.
		   (gnus-agent-append-to-list tail-undownloaded h)
		   (gnus-agent-append-to-list tail-unfetched    h)
                   (setq headers (cdr headers))) 
		  ((cdar alist)
		   (setq alist (cdr alist))
		   (setq headers (cdr headers))
		   nil                  ; ignore already downloaded
		   )
		  (t
		   (setq alist (cdr alist))
		   (setq headers (cdr headers))
                   
                   ;; This article isn't in the agent.  Check to see
                   ;; if it is in the cache.  If it is, it's been
                   ;; downloaded.
                   (while (and cached (< (car cached) a))
                     (setq cached (cdr cached)))
                   (unless (equal a (car cached))
                     (gnus-agent-append-to-list tail-undownloaded a))))))

	(while headers
          (let ((num (pop headers)))
            (gnus-agent-append-to-list tail-undownloaded num)
            (gnus-agent-append-to-list tail-unfetched    num)))

	(setq gnus-newsgroup-undownloaded (cdr undownloaded)
              gnus-newsgroup-unfetched    (cdr unfetched))))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1024 1025

(defun gnus-agent-catchup ()
1026 1027 1028
  "Mark as read all unhandled articles.
An article is unhandled if it is neither cached, nor downloaded, nor
downloadable."
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1029 1030
  (interactive)
  (save-excursion
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110
    (let ((articles gnus-newsgroup-undownloaded))
      (when (or gnus-newsgroup-downloadable
                gnus-newsgroup-cached)
        (setq articles (gnus-sorted-ndifference
			(gnus-sorted-ndifference
			 (gnus-copy-sequence articles)
			 gnus-newsgroup-downloadable)
			gnus-newsgroup-cached)))

      (while articles
        (gnus-summary-mark-article
         (pop articles) gnus-catchup-mark)))
    (gnus-summary-position-point)))

(defun gnus-agent-summary-fetch-series ()
  (interactive)
  (when gnus-newsgroup-processable
    (setq gnus-newsgroup-downloadable
          (let* ((dl gnus-newsgroup-downloadable)
                 (gnus-newsgroup-downloadable
		  (sort (gnus-copy-sequence gnus-newsgroup-processable) '<))
                 (fetched-articles (gnus-agent-summary-fetch-group)))
            ;; The preceeding call to (gnus-agent-summary-fetch-group)
            ;; updated gnus-newsgroup-downloadable to remove each
            ;; article successfully fetched.

            ;; For each article that I processed, remove its
            ;; processable mark IF the article is no longer
            ;; downloadable (i.e. it's already downloaded)
            (dolist (article gnus-newsgroup-processable)
              (unless (memq article gnus-newsgroup-downloadable)
                (gnus-summary-remove-process-mark article)))
            (gnus-sorted-ndifference dl fetched-articles)))))

(defun gnus-agent-summary-fetch-group (&optional all)
  "Fetch the downloadable articles in the group.
Optional arg ALL, if non-nil, means to fetch all articles."
  (interactive "P")
  (let ((articles
	 (if all gnus-newsgroup-articles
	   gnus-newsgroup-downloadable))
	(gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name))
        fetched-articles)
    (gnus-agent-while-plugged
      (unless articles
        (error "No articles to download"))
      (gnus-agent-with-fetch
        (setq gnus-newsgroup-undownloaded
              (gnus-sorted-ndifference
               gnus-newsgroup-undownloaded
               (setq fetched-articles
                     (gnus-agent-fetch-articles
                      gnus-newsgroup-name articles)))))
      (save-excursion
        (dolist (article articles)
          (let ((was-marked-downloadable 
                 (memq article gnus-newsgroup-downloadable)))
            (cond (gnus-agent-mark-unread-after-downloaded
                   (setq gnus-newsgroup-downloadable
                         (delq article gnus-newsgroup-downloadable))

                   (gnus-summary-mark-article article gnus-unread-mark))
                  (was-marked-downloadable
                   (gnus-summary-set-agent-mark article t)))
            (when (gnus-summary-goto-subject article nil t)
              (gnus-summary-update-download-mark article))))))
    fetched-articles))

(defun gnus-agent-fetch-selected-article ()
  "Fetch the current article as it is selected.
This can be added to `gnus-select-article-hook' or
`gnus-mark-article-hook'."
  (let ((gnus-command-method gnus-current-select-method))
    (when (and gnus-plugged (gnus-agent-method-p gnus-command-method))
      (when (gnus-agent-fetch-articles
             gnus-newsgroup-name
	     (list gnus-current-article))
	(setq gnus-newsgroup-undownloaded
	      (delq gnus-current-article gnus-newsgroup-undownloaded))
        (gnus-summary-update-download-mark gnus-current-article)))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1111 1112 1113 1114 1115 1116 1117 1118

;;;
;;; Internal functions
;;;

(defun gnus-agent-save-active (method)
  (when (gnus-agent-method-p method)
    (let* ((gnus-command-method method)
1119
	   (new (gnus-make-hashtable (count-lines (point-min) (point-max))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1120
	   (file (gnus-agent-lib-file "active")))
1121
      (gnus-active-to-gnus-format nil new)
1122 1123 1124 1125 1126
      (gnus-agent-write-active file new)
      (erase-buffer)
      (nnheader-insert-file-contents file))))

(defun gnus-agent-write-active (file new)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1127
    (gnus-make-directory (file-name-directory file))
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181
    (let ((nnmail-active-file-coding-system gnus-agent-file-coding-system))
      ;; The hashtable contains real names of groups.  However, do NOT
      ;; add the foreign server prefix as gnus-active-to-gnus-format
      ;; will add it while reading the file.
      (gnus-write-active-file file new nil)))

(defun gnus-agent-possibly-alter-active (group active &optional info)
  "Possibly expand a group's active range to include articles
downloaded into the agent."
  (let* ((gnus-command-method (or gnus-command-method
                                  (gnus-find-method-for-group group))))
    (when (gnus-agent-method-p gnus-command-method)
      (let* ((local (gnus-agent-get-local group))
             (active-min (or (car active) 0))
             (active-max (or (cdr active) 0))
             (agent-min (or (car local) active-min))
             (agent-max (or (cdr local) active-max)))

        (when (< agent-min active-min)
          (setcar active agent-min))

        (when (> agent-max active-max)
          (setcdr active agent-max))

        (when (and info (< agent-max (- active-min 100)))
          ;; I'm expanding the active range by such a large amount
          ;; that there is a gap of more than 100 articles between the
          ;; last article known to the agent and the first article
          ;; currently available on the server.  This gap contains
          ;; articles that have been lost, mark them as read so that
          ;; gnus doesn't waste resources trying to fetch them.

          ;; NOTE: I don't do this for smaller gaps (< 100) as I don't
          ;; want to modify the local file everytime someone restarts
          ;; gnus.  The small gap will cause a tiny performance hit
          ;; when gnus tries, and fails, to retrieve the articles.
          ;; Still that should be smaller than opening a buffer,
          ;; printing this list to the buffer, and then writing it to a
          ;; file.

          (let ((read (gnus-info-read info)))
            (gnus-info-set-read 
             info 
             (gnus-range-add 
              read 
              (list (cons (1+ agent-max) 
                          (1- active-min))))))

          ;; Lie about the agent's local range for this group to
          ;; disable the set read each time this server is opened.
          ;; NOTE: Opening this group will restore the valid local
          ;; range but it will also expand the local range to
          ;; incompass the new active range.
          (gnus-agent-set-local group agent-min (1- active-min)))))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1182 1183

(defun gnus-agent-save-group-info (method group active)
1184
  "Update a single group's active range in the agent's copy of the server's active file."
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1185 1186
  (when (gnus-agent-method-p method)
    (let* ((gnus-command-method method)
1187 1188 1189
	   (coding-system-for-write nnheader-file-coding-system)
	   (file-name-coding-system nnmail-pathname-coding-system)
	   (file (gnus-agent-lib-file "active"))
1190
	   oactive-min oactive-max)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1191
      (gnus-make-directory (file-name-directory file))
1192 1193
      (with-temp-file file
	;; Emacs got problem to match non-ASCII group in multibyte buffer.
1194
	(mm-disable-multibyte)
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1195
	(when (file-exists-p file)
1196 1197 1198 1199 1200 1201 1202 1203 1204
	  (nnheader-insert-file-contents file)

          (goto-char (point-min))
          (when (re-search-forward
                 (concat "^" (regexp-quote group) " ") nil t)
            (save-excursion
              (setq oactive-max (read (current-buffer)) ;; max
                    oactive-min (read (current-buffer)))) ;; min
            (gnus-delete-line)))
1205
	(insert (format "%S %d %d y\n" (intern group)
1206 1207
			(max (or oactive-max (cdr active)) (cdr active))
                        (min (or oactive-min (car active)) (car active))))
1208 1209 1210
	(goto-char (point-max))
	(while (search-backward "\\." nil t)
	  (delete-char 1))))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1211 1212

(defun gnus-agent-group-path (group)
1213
  "Translate GROUP into a file name."
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

  ;; NOTE: This is what nnmail-group-pathname does as of Apr 2003.
  ;; The two methods must be kept synchronized, which is why
  ;; gnus-agent-group-pathname was added.

  (setq group
        (nnheader-translate-file-chars
         (nnheader-replace-duplicate-chars-in-string
          (nnheader-replace-chars-in-string 
           (gnus-group-real-name group)
           ?/ ?_)
          ?. ?_)))
  (if (or nnmail-use-long-file-names
          (file-directory-p (expand-file-name group (gnus-agent-directory))))
      group
    (mm-encode-coding-string
     (nnheader-replace-chars-in-string group ?. ?/)
     nnmail-pathname-coding-system)))

(defun gnus-agent-group-pathname (group)
  "Translate GROUP into a file name."
  ;; nnagent uses nnmail-group-pathname to read articles while
  ;; unplugged.  The agent must, therefore, use the same directory
  ;; while plugged.
  (let ((gnus-command-method (or gnus-command-method
                                 (gnus-find-method-for-group group))))
    (nnmail-group-pathname (gnus-group-real-name group) (gnus-agent-directory))))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1241 1242

(defun gnus-agent-get-function (method)
1243 1244 1245 1246 1247 1248 1249 1250
  (if (gnus-online method)
      (car method)
    (require 'nnagent)
    'nnagent))

(defun gnus-agent-covered-methods ()
  "Return the subset of methods that are covered by the agent."
  (delq nil (mapcar #'gnus-server-to-method gnus-agent-covered-methods)))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263

;;; 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)
1264
    (mm-disable-multibyte) ;; everything is binary
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1265 1266 1267 1268
    (erase-buffer)
    (insert "\n")
    (let ((file (gnus-agent-lib-file "history")))
      (when (file-exists-p file)
1269
	(nnheader-insert-file-contents file))
Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285
      (set (make-local-variable 'gnus-agent-file-name) file))))

(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))))

;;;
;;; Fetching
;;;

(defun gnus-agent-fetch-articles (group articles)
  "Fetch ARTICLES from GROUP and put them into the Agent."
  (when articles
1286 1287 1288 1289 1290 1291 1292 1293 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 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418
    (gnus-agent-load-alist group)
    (let* ((alist   gnus-agent-article-alist)
           (headers (if (< (length articles) 2) nil gnus-newsgroup-headers))
           (selected-sets (list nil))
           (current-set-size 0)
           article
           header-number)
      ;; Check each article
      (while (setq article (pop articles))
        ;; Skip alist entries preceeding this article
        (while (> article (or (caar alist) (1+ article)))
          (setq alist (cdr alist)))

        ;; Prune off articles that we have already fetched.
        (unless (and (eq article (caar alist))
                     (cdar alist))
          ;; Skip headers preceeding this article
          (while (> article 
                    (setq header-number
                          (let* ((header (car headers)))
                            (if header
                                (mail-header-number header)
                              (1+ article)))))
            (setq headers (cdr headers)))

          ;; Add this article to the current set
          (setcar selected-sets (cons article (car selected-sets)))

          ;; Update the set size, when the set is too large start a
          ;; new one.  I do this after adding the article as I want at
          ;; least one article in each set.
          (when (< gnus-agent-max-fetch-size
                   (setq current-set-size
			 (+ current-set-size
			    (if (= header-number article)
                                (let ((char-size (mail-header-chars
                                                  (car headers))))
                                  (if (<= char-size 0)
                                      ;; The char size was missing/invalid,
                                      ;; assume a worst-case situation of
                                      ;; 65 char/line.  If the line count
                                      ;; is missing, arbitrarily assume a
                                      ;; size of 1000 characters.
                                    (max (* 65 (mail-header-lines
                                                (car headers)))
                                         1000)
                                    char-size))
			      0))))
            (setcar selected-sets (nreverse (car selected-sets)))
            (setq selected-sets (cons nil selected-sets)
                  current-set-size 0))))

      (when (or (cdr selected-sets) (car selected-sets))
        (let* ((fetched-articles (list nil))
               (tail-fetched-articles fetched-articles)
               (dir (gnus-agent-group-pathname group))
               (date (time-to-days (current-time)))
               (case-fold-search t)
               pos crosses id)

          (setcar selected-sets (nreverse (car selected-sets)))
          (setq selected-sets (nreverse selected-sets))

          (gnus-make-directory dir)
          (gnus-message 7 "Fetching articles for %s..." group)

          (unwind-protect
              (while (setq articles (pop selected-sets))
                ;; Fetch the articles from the backend.
                (if (gnus-check-backend-function 'retrieve-articles group)
                    (setq pos (gnus-retrieve-articles articles group))
                  (with-temp-buffer
                    (let (article)
                      (while (setq article (pop articles))
                        (gnus-message 10 "Fetching article %s for %s..."
                                      article group)
                        (when (or
                               (gnus-backlog-request-article group article
                                                             nntp-server-buffer)
                               (gnus-request-article article group))
                          (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))
                    (unless (eobp) ;; Don't save empty articles.
                      (when (search-forward "\n\n" nil t)
                        (when (search-backward "\nXrefs: " nil t)
                          ;; Handle cross posting.
                          (goto-char (match-end 0)) ; move to end of header name
                          (skip-chars-forward "^ ") ; skip server name
                          (skip-chars-forward " ")
                          (setq crosses nil)
                          (while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) *")
                            (push (cons (buffer-substring (match-beginning 1)
                                                          (match-end 1))
                                        (string-to-int
					 (buffer-substring (match-beginning 2)
							   (match-end 2))))
                                  crosses)
                            (goto-char (match-end 0)))
                          (gnus-agent-crosspost crosses (caar pos) date)))
                      (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))

                      (gnus-agent-append-to-list
		       tail-fetched-articles (caar pos)))
                    (widen)
                    (setq pos (cdr pos)))))

            (gnus-agent-save-alist group (cdr fetched-articles) date)
            (gnus-message 7 ""))
          (cdr fetched-articles))))))

(defun gnus-agent-crosspost (crosses article &optional date)
  (setq date (or date t))

Lars Magne Ingebrigtsen's avatar
Lars Magne Ingebrigtsen committed
1419 1420 1421 1422 1423 1424