lisp/gnus/nnmairix.el

   1 ;;; nnmairix.el --- Mairix back end for Gnus, the Emacs newsreader
   2
   3 ;; Copyright (C) 2007-2015 Free Software Foundation, Inc.
   4
   5 ;; Author: David Engster <dengste@eml.cc>
   6 ;; Keywords: mail searching
   7 ;; Old-Version: 0.6
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;; This is a back end for using the mairix search engine with
  27 ;; Gnus.  Mairix is a tool for searching words in locally stored
  28 ;; mail.  Mairix is very fast which allows using it efficiently for
  29 ;; "smart folders", e.g. folders which are associated with search
  30 ;; queries.  Of course, you can also use this back end just for
  31 ;; calling mairix with some search query.
  32 ;;
  33 ;; Mairix is written by Richard Curnow.  More information can be found at
  34 ;; http://www.rpcurnow.force9.co.uk/mairix/
  35
  36 ;; Commentary on the code: nnmairix sits between Gnus and the "real"
  37 ;; back end which handles the mail (currently nnml, nnimap and
  38 ;; nnmaildir were tested). I know this is all a bit hacky, but so far
  39 ;; it works for me.  This is the first back end I've written for Gnus,
  40 ;; so I'd appreciate any comments, suggestions, bug reports (and, of
  41 ;; course, patches) for improving nnmairix.
  42
  43 ;; nnmairix does not use an active file, since I wanted to contain the
  44 ;; back end "inside Gnus" as much as possible without the need of an
  45 ;; external file.  It stores the query/folder information in the group
  46 ;; parameters instead.  This also implies that once you kill a mairix
  47 ;; group, it's gone for good.  I don't think that this is really
  48 ;; problematic, since I don't see the need in unsubscribing and
  49 ;; re-subscribing search groups
  50
  51 ;; Every mairix server is "responsible" for one mairix installation,
  52 ;; i.e. you can have several mairix servers for different mairix
  53 ;; configurations.  Not that I think anyone will actually do this, but
  54 ;; I thought it would be a "nice to have feature"...
  55
  56 ;; KNOWN BUGS:
  57 ;; * Mairix does only support us-ascii characters.
  58
  59 ;; TODO/MISSING FEATURES:
  60 ;; * Support of more back ends (nnmh, nnfolder, nnmbox...)?
  61 ;; * Maybe use an active file instead of group parameters?
  62 ;; * Maybe use "-a" when updating groups which are not newly created?
  63
  64 ;;; Changelog:
  65 ;; 05/30/2008 - version 0.6
  66 ;;
  67 ;;    * It is now possible to propagate marks from the nnmairix groups
  68 ;;      to the original messages (and for maildir also vice versa). See
  69 ;;      the docs for details on this feature - it's pretty delicate
  70 ;;      and currently needs a patched mairix binary to work smoothly.
  71 ;;
  72 ;;    * Keep messages in nnmairix groups always read/unread
  73 ;;      (bound to 'G b r').
  74 ;;
  75 ;;    * Recreate back end folder for nnmairix groups in case you
  76 ;;      somehow get wrong article counts (bound to 'G b d').
  77 ;;
  78 ;;    * New group parameter 'allow-fast'. Toggling of parameter bound
  79 ;;      to 'G b a'. The default is nil, meaning that the group will
  80 ;;      always be updated with a mairix search, even when only entered.
  81 ;;
  82 ;;    * More/Better use of the registry (if available). Can now also
  83 ;;      deal with duplicate messages in different groups.
  84 ;;
  85 ;; 02/06/2008 - version 0.5
  86 ;;
  87 ;;    * New function: nnmairix-goto-original-article. Uses the
  88 ;;      registry or the mail file path for determining original group.
  89 ;;
  90 ;;    * Deal with empty Xref header
  91 ;;
  92 ;;    * Changed summary mode keybindings since the old ones were
  93 ;;      already taken
  94 ;;
  95 ;;   (Thanks to Tassilo Horn and Ted Zlatanov for their help)
  96 ;;
  97 ;; 01/07/2008 - version 0.4
  98 ;;
  99 ;;    * New/fixed doc strings and code cleanup.
 100 ;;
 101 ;; 11/18/2007 - version 0.3
 102 ;;
 103 ;;    * Fixed bugs when dealing with nnml and native servers
 104 ;;
 105 ;;    * Make variables customizable
 106 ;;
 107 ;; 10/10/2007 - version 0.2
 108 ;;
 109 ;;    * Use nnml-directory/directory server variables for nnml and
 110 ;;    nnmaildir back ends as path for search folders. This way it
 111 ;;    becomes independent of 'base' setting in .mairixirc (but not for
 112 ;;    nnimap).
 113 ;;
 114 ;;    * As a result: Changed nnmairix-backend-to-server so that user
 115 ;;    is asked when more than one nnmairix server exists and we do not
 116 ;;    know which one is responsible for current back end.
 117 ;;
 118 ;;    * Rename files when using nnml back ends so that there are no
 119 ;;    holes in article numbers. This should fix all problems regarding
 120 ;;    wrong article counts with nnml.
 121 ;;
 122 ;;    * More commands for creating queries (using widgets or the
 123 ;;    minibuffer).
 124 ;;
 125 ;;    * Fixed bug in nnmairix-create-search-group-from-message
 126 ;;
 127 ;;    * Changed copyright to FSF
 128 ;;
 129 ;;      (Thanks to Georg C. F. Greve and Bastien for suggestions and
 130 ;;      ideas!)
 131 ;;
 132 ;; 10/03/2007 - version 0.1 - first release
 133
 134
 135 ;;; Code:
 136
 137 (eval-when-compile (require 'cl))       ;For (pop (cdr ogroup)).
 138
 139 (require 'nnoo)
 140 (require 'gnus-group)
 141 (require 'gnus-sum)
 142 (require 'message)
 143 (require 'nnml)
 144 (require 'widget)
 145
 146 (nnoo-declare nnmairix)
 147
 148 ;;; === Keymaps
 149
 150 (eval-when-compile
 151   (when (featurep 'xemacs)
 152     ;; The `kbd' macro requires that the `read-kbd-macro' macro is available.
 153     (require 'edmacro)))
 154
 155 ;; Group mode
 156 (defun nnmairix-group-mode-hook ()
 157   "Nnmairix group mode keymap."
 158   (define-key gnus-group-mode-map
 159     (kbd "G b") (make-sparse-keymap))
 160   (define-key gnus-group-mode-map
 161     (kbd "G b g") 'nnmairix-create-search-group)
 162   (define-key gnus-group-mode-map
 163     (kbd "G b c") 'nnmairix-create-server-and-default-group)
 164   (define-key gnus-group-mode-map
 165     (kbd "G b q") 'nnmairix-group-change-query-this-group)
 166   (define-key gnus-group-mode-map
 167     (kbd "G b t") 'nnmairix-group-toggle-threads-this-group)
 168   (define-key gnus-group-mode-map
 169     (kbd "G b u") 'nnmairix-update-database)
 170   (define-key gnus-group-mode-map
 171     (kbd "G b s") 'nnmairix-search)
 172   (define-key gnus-group-mode-map
 173     (kbd "G b i") 'nnmairix-search-interactive)
 174   (define-key gnus-group-mode-map
 175     (kbd "G b m") 'nnmairix-widget-search)
 176   (define-key gnus-group-mode-map
 177     (kbd "G b p") 'nnmairix-group-toggle-propmarks-this-group)
 178   (define-key gnus-group-mode-map
 179     (kbd "G b r") 'nnmairix-group-toggle-readmarks-this-group)
 180   (define-key gnus-group-mode-map
 181     (kbd "G b d") 'nnmairix-group-delete-recreate-this-group)
 182   (define-key gnus-group-mode-map
 183     (kbd "G b a") 'nnmairix-group-toggle-allowfast-this-group)
 184   (define-key gnus-group-mode-map
 185     (kbd "G b o") 'nnmairix-propagate-marks))
 186
 187 ;; Summary mode
 188 (defun nnmairix-summary-mode-hook ()
 189   "Nnmairix summary mode keymap."
 190   (define-key gnus-summary-mode-map
 191     (kbd "G G t") 'nnmairix-search-thread-this-article)
 192   (define-key gnus-summary-mode-map
 193     (kbd "G G f") 'nnmairix-search-from-this-article)
 194   (define-key gnus-summary-mode-map
 195     (kbd "G G m") 'nnmairix-widget-search-from-this-article)
 196   (define-key gnus-summary-mode-map
 197     (kbd "G G g") 'nnmairix-create-search-group-from-message)
 198   (define-key gnus-summary-mode-map
 199     (kbd "G G o") 'nnmairix-goto-original-article)
 200   (define-key gnus-summary-mode-map
 201     (kbd "G G u") 'nnmairix-remove-tick-mark-original-article))
 202
 203 (add-hook 'gnus-group-mode-hook 'nnmairix-group-mode-hook)
 204 (add-hook 'gnus-summary-mode-hook 'nnmairix-summary-mode-hook)
 205
 206 ;; ;;;###autoload
 207 ;; (defun nnmairix-initialize (&optional force)
 208 ;;   (interactive "P")
 209 ;;   (if (not (or (file-readable-p "~/.mairixrc")
 210 ;;             force))
 211 ;;       (message "No file `~/.mairixrc', skipping nnmairix setup")
 212 ;;     (add-hook 'gnus-group-mode-hook 'nnmairix-group-mode-hook)
 213 ;;     (add-hook 'gnus-summary-mode-hook 'nnmairix-summary-mode-hook)))
 214
 215 ;; Customizable stuff
 216
 217 (defgroup nnmairix nil
 218   "Back end for the Mairix mail search engine."
 219   :group 'gnus)
 220
 221 (defcustom nnmairix-group-prefix "zz_mairix"
 222   "Prefix for mairix search groups on back end server.
 223 nnmairix will create these groups automatically on the back end
 224 server for each nnmairix search group.  The name on the back end
 225 server will be this prefix plus a random number.  You can delete
 226 unused nnmairix groups on the back end using
 227 `nnmairix-purge-old-groups'."
 228   :version "23.1"
 229   :type 'string
 230   :group 'nnmairix)
 231
 232 (defcustom nnmairix-mairix-output-buffer "*mairix output*"
 233   "Buffer used for mairix output."
 234   :version "23.1"
 235   :type 'string
 236   :group 'nnmairix)
 237
 238 (defcustom nnmairix-customize-query-buffer "*mairix query*"
 239   "Name of the buffer for customizing Mairix queries."
 240   :version "23.1"
 241   :type 'string
 242   :group 'nnmairix)
 243
 244 (defcustom nnmairix-mairix-update-options '("-F" "-Q")
 245   "Options when calling mairix for updating the database.
 246 The default is '-F' and '-Q' for making updates faster.  You
 247 should call mairix without these options from time to
 248 time (e.g. via cron job)."
 249   :version "23.1"
 250   :type '(repeat string)
 251   :group 'nnmairix)
 252
 253 (defcustom nnmairix-mairix-search-options '("-Q")
 254   "Options when calling mairix for searching.
 255 The default is '-Q' for making searching faster."
 256   :version "23.1"
 257   :type '(repeat string)
 258   :group 'nnmairix)
 259
 260 (defcustom nnmairix-mairix-synchronous-update nil
 261   "Set this to t if you want Emacs to wait for mairix updating the database."
 262   :version "23.1"
 263   :type 'boolean
 264   :group 'nnmairix)
 265
 266 (defcustom nnmairix-rename-files-for-nnml t
 267   "Rename nnml mail files so that they are consecutively numbered.
 268 When using nnml as back end, mairix might produce holes in the
 269 article numbers which will produce wrong article counts by
 270 Gnus.  This option controls whether nnmairix should rename the
 271 files consecutively."
 272   :version "23.1"
 273   :type 'boolean
 274   :group 'nnmairix)
 275
 276 (defcustom nnmairix-widget-fields-list
 277   '(("from" "f" "From") ("to" "t" "To") ("cc" "c" "Cc")
 278     ("subject" "s" "Subject")  ("to" "tc" "To or Cc")
 279     ("from" "a" "Address") (nil "b" "Body") (nil "n" "Attachment")
 280     ("Message-ID" "m" "Message ID") (nil "s" "Size") (nil "d" "Date"))
 281   "Fields that should be editable during interactive query customization.
 282
 283 Header, corresponding mairix command and description for editable
 284 fields in interactive query customization.  The header specifies
 285 which header contents should be inserted into the editable field
 286 when creating a Mairix query based on the current message (can be
 287 nil for disabling this)."
 288   :version "23.1"
 289   :type '(repeat (list
 290                   (choice :tag "Field"
 291                           (const :tag "none" nil)
 292                           (const :tag "From" "from")
 293                           (const :tag "To" "to")
 294                           (const :tag "Cc" "cc")
 295                           (const :tag "Subject" "subject")
 296                           (const :tag "Message ID" "Message-ID"))
 297                   (string :tag "Command")
 298                   (string :tag "Description")))
 299   :group 'nnmairix)
 300
 301 (defcustom nnmairix-widget-select-window-function
 302   (lambda () (select-window (get-largest-window)))
 303   "Function for selecting the window for customizing the mairix query.
 304 The default chooses the largest window in the current frame."
 305   :version "23.1"
 306   :type 'function
 307   :group 'nnmairix)
 308
 309 (defcustom nnmairix-propagate-marks-upon-close t
 310   "Flag if marks should be propagated upon closing a group.
 311 The default of this variable is t.  If set to 'ask, the
 312 user will be asked if the flags should be propagated when the
 313 group is closed.  If set to nil, the user will have to manually
 314 call 'nnmairix-propagate-marks'."
 315   :version "23.1"
 316   :type '(choice (const :tag "always" t)
 317                  (const :tag "ask" ask)
 318                  (const :tag "never" nil))
 319   :group 'nnmairix)
 320
 321 (defcustom nnmairix-propagate-marks-to-nnmairix-groups nil
 322   "Flag if marks from original articles should be seen in nnmairix groups.
 323 The default is nil since it will only work if the articles are in
 324 maildir format and NOT managed by the nnmaildir back end but
 325 e.g. an IMAP server (which stores the marks in the maildir file
 326 name).  You may safely set this to t for testing - the worst that
 327 can happen are wrong marks in nnmairix groups."
 328   :version "23.1"
 329   :type 'boolean
 330   :group 'nnmairix)
 331
 332 (defcustom nnmairix-only-use-registry nil
 333   "Use only the registry for determining original group(s).
 334 If set to t, nnmairix will only use the registry for determining
 335 the original group(s) of an article (which is also necessary for
 336 propagating marks).  If set to nil, it will also try to determine
 337 the group from an additional mairix search which might be slow
 338 when propagating lots of marks."
 339   :version "23.1"
 340   :type 'boolean
 341   :group 'nnmairix)
 342
 343 (defcustom nnmairix-allowfast-default nil
 344   "Whether fast entering should be the default for nnmairix groups.
 345 You may set this to t to make entering the group faster, but note that
 346 this might lead to problems, especially when used with marks propagation."
 347   :version "23.1"
 348   :type 'boolean
 349   :group 'nnmairix)
 350
 351 ;; ==== Other variables
 352
 353 (defvar nnmairix-widget-other
 354   '(threads flags)
 355   "Other editable mairix commands when using customization widgets.
 356 Currently there are 'threads and 'flags.")
 357
 358 (defvar nnmairix-interactive-query-parameters
 359   '((?f "from" "f" "From") (?t "to" "t" "To") (?c "to" "tc" "To or Cc")
 360     (?a "from" "a" "Address") (?s "subject" "s" "Subject") (?b nil "b" "Body")
 361     (?d nil "d" "Date") (?n nil "n" "Attachment"))
 362   "Things that should be editable during interactive query generation.
 363 Every list element consists of the following entries: Keystroke,
 364 message field (if any), mairix command and description.")
 365
 366 (defvar nnmairix-delete-and-create-on-change '(nnimap nnmaildir nnml)
 367   "Controls on which back ends groups should be deleted and re-created.
 368 This variable is a list of back ends where the search group
 369 should be completely deleted and re-created when the query or
 370 thread parameter changes.  The default is to this for all
 371 currently supported back ends.  It usually also corrects the
 372 problem of \"holes\" in the article numbers which often lead to a
 373 wrong count of total articles shown by Gnus.")
 374
 375 ;;; === Server variables
 376
 377 (defvoo nnmairix-backend  nil
 378   "Back end where mairix stores its searches.")
 379
 380 (defvoo nnmairix-backend-server nil
 381   "Name of the server where mairix stores its searches.")
 382
 383 (defvoo nnmairix-mairix-command "mairix"
 384   "Command to call mairix for this nnmairix server.")
 385
 386 (defvoo nnmairix-hidden-folders nil
 387   "Set this to t if the back end server uses hidden directories for
 388 its maildir mail folders (e.g. the Dovecot IMAP server or mutt).")
 389
 390 (defvoo nnmairix-default-group nil
 391   "Default search group. This is the group which is used for all
 392 temporary searches, e.g. nnmairix-search.")
 393
 394 ;;; === Internal variables
 395
 396 (defconst nnmairix-group-regexp
 397   (format "%s-\\(.*\\)-[0-9]+" nnmairix-group-prefix)
 398   "Regexp for mairix groups on back end.")
 399
 400 (defconst nnmairix-valid-backends '(nnimap nnml nnmaildir)
 401   "Back ends supported by nnmairix.
 402 Other back ends might or might not work.")
 403
 404 (defvar nnmairix-last-server nil
 405   "Last chosen server.")
 406
 407 (defvar nnmairix-current-server nil
 408   "Current server.")
 409
 410 (defvar nnmairix-marks-cache nil
 411   "Cache for marks which should be set upon closing current group.")
 412
 413 (defvar nnmairix-version-output nil
 414   "Version string of mairix binary.")
 415
 416 ;;; === Gnus back end functions
 417
 418 (nnoo-define-basics nnmairix)
 419
 420 (gnus-declare-backend "nnmairix" 'mail 'address)
 421
 422 (deffoo nnmairix-open-server (server &optional definitions)
 423   ;; just set server variables
 424   (setq nnmairix-current-server server)
 425   (nnoo-change-server 'nnmairix server definitions))
 426
 427 (deffoo nnmairix-request-group (group &optional server fast info)
 428   ;; Call mairix and request group on back end server
 429   (when server (nnmairix-open-server server))
 430   (let* ((qualgroup (if server
 431                         (gnus-group-prefixed-name group (list 'nnmairix server))
 432                       group))
 433          (folder (gnus-group-get-parameter qualgroup 'folder))
 434          (allowfast (gnus-group-get-parameter qualgroup 'allow-fast))
 435          (query (gnus-group-get-parameter qualgroup 'query t))
 436          (threads (gnus-group-get-parameter qualgroup 'threads))
 437          (backendmethod (gnus-server-to-method
 438                          (format "%s:%s" (symbol-name nnmairix-backend)
 439                                  nnmairix-backend-server)))
 440          rval mfolder folderpath args)
 441     (cond
 442      ((not folder)
 443       ;; No folder parameter -> error
 444       (nnheader-report 'nnmairix "Check folder parameter for group %s" group)
 445       nil)
 446      ((not query)
 447       ;; No query -> return empty group
 448       (with-current-buffer nntp-server-buffer
 449         (erase-buffer)
 450         (insert (concat "211 0 1 0 " group))
 451         t))
 452      (t
 453       ;; For maildir++ folders: create a hidden directory (prepend dot)
 454       (setq mfolder (if (and nnmairix-hidden-folders
 455                              (not (string-match "^\\." folder)))
 456                         (concat "." folder)
 457                       folder))
 458       ;; For nnml and nnmaildir, precede mfolder with directory where mail
 459       ;; is actually stored so that it's independent of 'base' setting
 460       ;; in .mairixrc.
 461       (when (eq nnmairix-backend 'nnml)
 462         (setq folderpath (cadr (assoc 'nnml-directory backendmethod)))
 463         ;; if nnml-directory is not explicitly set, use global value
 464         (when (not folderpath)
 465           (setq folderpath nnml-directory)))
 466       (when (eq nnmairix-backend 'nnmaildir)
 467         (setq folderpath
 468               (cadr (assoc 'directory backendmethod))))
 469       (when folderpath
 470         (setq mfolder
 471               (concat
 472                (file-name-as-directory
 473                 (expand-file-name
 474                  folderpath))
 475                mfolder)))
 476       ;; If (not fast), call Mairix binary
 477       ;; recreate underlying folder on the back end
 478       (setq rval
 479             (if (and fast allowfast)
 480                 0
 481               (nnmairix-call-mairix-binary
 482                (split-string nnmairix-mairix-command)
 483                mfolder query threads)))
 484       ;; Check return value
 485       (cond
 486        ((zerop rval)                    ; call was successful
 487         (nnmairix-call-backend
 488          "open-server" nnmairix-backend-server)
 489         ;; If we're dealing with nnml, rename files
 490         ;; consecutively and make new active file for this
 491         ;; group
 492         (when (eq nnmairix-backend 'nnml)
 493           (when nnmairix-rename-files-for-nnml
 494             (nnmairix-rename-files-consecutively mfolder))
 495           (nnml-generate-nov-databases-directory mfolder nil t))
 496         (nnmairix-call-backend
 497          "request-scan" folder nnmairix-backend-server)
 498         (if (and fast allowfast)
 499             t
 500           (nnmairix-request-group-with-article-number-correction
 501            folder qualgroup)))
 502        ((and (= rval 1)
 503              (with-current-buffer nnmairix-mairix-output-buffer
 504                (goto-char (point-min))
 505                (looking-at "^Matched 0 messages")))
 506         ;; No messages found -> return empty group
 507         (nnheader-message 5 "Mairix: No matches found.")
 508         (set-buffer nntp-server-buffer)
 509         (erase-buffer)
 510         (insert (concat "211 0 1 0 " group))
 511         t)
 512        ;; Everything else is an error
 513        (t
 514         (nnheader-report
 515          'nnmairix "Error running mairix. See buffer %s for details"
 516          nnmairix-mairix-output-buffer)
 517         nil))))))
 518
 519
 520 (deffoo nnmairix-request-create-group (group &optional server args)
 521   (let ((qualgroup (if server (gnus-group-prefixed-name group (list 'nnmairix server))
 522                      group))
 523         (exist t)
 524         (count 0)
 525         groupname info)
 526     (when server (nnmairix-open-server server))
 527     (gnus-group-add-parameter qualgroup '(query . nil))
 528     (gnus-group-add-parameter qualgroup '(threads . nil))
 529     (while exist
 530       (setq count (1+ count))
 531       (setq groupname (format "%s-%s-%s" nnmairix-group-prefix group
 532                               (number-to-string count)))
 533       (setq exist (nnmairix-call-backend
 534                    "request-group" groupname nnmairix-backend-server)))
 535     (nnmairix-call-backend
 536      "request-create-group" groupname nnmairix-backend-server)
 537     (gnus-group-add-parameter qualgroup '(folder . nil))
 538     (when nnmairix-allowfast-default
 539       (gnus-group-add-parameter qualgroup '(allow-fast . t)))
 540     (gnus-group-set-parameter qualgroup 'folder groupname))
 541   t)
 542
 543
 544 (deffoo nnmairix-retrieve-headers (articles group &optional server fetch-old)
 545   (when server (nnmairix-open-server server))
 546   (let* ((folder (nnmairix-get-backend-folder group server))
 547          (corr (nnmairix-get-numcorr group server))
 548          (numcorr 0)
 549          rval)
 550     (when (and corr
 551                (not (zerop (cadr corr)))
 552                (numberp (car articles)))
 553       (setq numcorr (cadr corr))
 554       (setq articles
 555             (mapcar
 556              (lambda (arg) (- arg numcorr))
 557              articles)))
 558     (setq rval
 559           (if (eq nnmairix-backend 'nnimap)
 560               (let ((gnus-nov-is-evil t))
 561                 (nnmairix-call-backend
 562                  "retrieve-headers" articles folder nnmairix-backend-server fetch-old))
 563             (nnmairix-call-backend
 564              "retrieve-headers" articles folder nnmairix-backend-server fetch-old)))
 565     (nnmairix-replace-group-and-numbers articles folder group numcorr rval)
 566     rval))
 567
 568 (deffoo nnmairix-request-article (article &optional group server to-buffer)
 569   (when server (nnmairix-open-server server))
 570   (let ((folder (nnmairix-get-backend-folder group server))
 571         (corr (nnmairix-get-numcorr group server)))
 572     (when (and
 573            (numberp article)
 574            corr
 575            (not (zerop (cadr corr))))
 576       (setq article (- article (cadr corr))))
 577     (nnmairix-call-backend
 578      "request-article" article folder nnmairix-backend-server to-buffer))
 579   t)
 580
 581 (deffoo nnmairix-request-list (&optional server)
 582   (when server (nnmairix-open-server server))
 583   (if (nnmairix-call-backend "request-list" nnmairix-backend-server)
 584       (let (cpoint cur qualgroup folder)
 585         (with-current-buffer nntp-server-buffer
 586           (goto-char (point-min))
 587           (setq cpoint (point))
 588           (while (re-search-forward nnmairix-group-regexp (point-max) t)
 589             (setq cur (match-string 1)
 590                   qualgroup (gnus-group-prefixed-name cur
 591                                                       (list 'nnmairix server)))
 592             (if (and (gnus-group-entry qualgroup)
 593                      (string= (match-string 0)
 594                               (gnus-group-get-parameter qualgroup 'folder)))
 595                 (progn
 596                   (replace-match cur)
 597                   (delete-region cpoint (point-at-bol))
 598                   (forward-line)
 599                   (setq cpoint (point)))
 600               (forward-line)))
 601           (delete-region cpoint (point-max)))
 602         t)
 603     nil))
 604
 605 ;; Silence byte-compiler.
 606 (autoload 'gnus-registry-get-id-key "gnus-registry")
 607
 608 (deffoo nnmairix-request-set-mark (group actions &optional server)
 609   (when server
 610     (nnmairix-open-server server))
 611   (let* ((qualgroup (gnus-group-prefixed-name group (list 'nnmairix nnmairix-current-server)))
 612          (propmarks (gnus-group-get-parameter qualgroup 'propmarks))
 613          (propto (gnus-group-get-parameter qualgroup 'propto t))
 614          (corr (nnmairix-get-numcorr group server))
 615          (folder (nnmairix-get-backend-folder group server)))
 616     (save-excursion
 617       (dolist (cur actions)
 618         (let ((type (nth 1 cur))
 619               (cmdmarks (nth 2 cur))
 620               (range (gnus-uncompress-range (nth 0 cur)))
 621               mid ogroup number method temp)
 622           (when (and corr
 623                      (not (zerop (cadr corr))))
 624             (setq range (mapcar (lambda (arg)
 625                                   (- arg (cadr corr)))
 626                                 range)))
 627           (when propmarks
 628             (nnheader-message 7 "nnmairix: Setting marks...")
 629               (dolist (article range)
 630                 ;; get article (header) and extract message id
 631                 ;; we try to determine as many original articles as possible
 632                 (catch 'problem
 633                   (nnmairix-call-backend "open-server" nnmairix-backend-server)
 634                   (unless (gnus-request-head
 635                            article
 636                            (gnus-group-prefixed-name
 637                             folder
 638                             (list nnmairix-backend nnmairix-backend-server)))
 639                     (nnheader-message
 640                      3 "Unable to set mark: couldn't fetch article header for article number %d"
 641                      article)
 642                     (throw 'problem nil))
 643                   (set-buffer nntp-server-buffer)
 644                   (goto-char (point-min))
 645                   (let ((case-fold-search t))
 646                     (re-search-forward "^message-id:.*\\(<.+>\\)" nil t))
 647                   (setq mid (match-string 1))
 648                   (unless mid
 649                     (nnheader-message
 650                      3 "Unable to set mark: article number %d has no message-id header"
 651                      article)
 652                     (throw 'problem nil))
 653                   ;; get original group. First try registry, then file path
 654                   (setq ogroup
 655                         (nnmairix-determine-original-group-from-registry mid))
 656                   (unless (or ogroup
 657                               nnmairix-only-use-registry)
 658                     (setq ogroup
 659                           (nnmairix-determine-original-group-from-path
 660                            mid nnmairix-current-server)))
 661                   (unless ogroup
 662                     (nnheader-message
 663                      3 "Unable to set mark: couldn't find original group for %s" mid)
 664                     (throw 'problem nil))
 665                   ;; store original groups with mid's. We cannot get
 666                   ;; the article number immediately since this would
 667                   ;; generate problems with maildir (articles might
 668                   ;; get moved from /new to /cur and further marks
 669                   ;; could then not be set)
 670                   (dolist (cur ogroup)
 671                     (setq temp (assoc cur
 672                                       nnmairix-marks-cache))
 673                     (if temp
 674                         (nconc temp (list (list mid type cmdmarks)))
 675                       (push (list cur (list mid type cmdmarks))
 676                             nnmairix-marks-cache)))))
 677               (nnheader-message 7 "nnmairix: Setting marks... done")))))))
 678
 679 (deffoo nnmairix-close-group (group &optional server)
 680   (when server
 681     (nnmairix-open-server server))
 682   (let* ((qualgroup (gnus-group-prefixed-name group (list 'nnmairix nnmairix-current-server)))
 683          (propmarks (gnus-group-get-parameter qualgroup 'propmarks))
 684          method)
 685     (when (and propmarks
 686                nnmairix-marks-cache)
 687       (when (or (eq nnmairix-propagate-marks-upon-close t)
 688                 (and (eq nnmairix-propagate-marks-upon-close 'ask)
 689                      (y-or-n-p "Propagate marks to original articles? ")))
 690       (with-current-buffer gnus-group-buffer
 691         (nnmairix-propagate-marks)
 692         ;; update mairix group
 693         (gnus-group-jump-to-group qualgroup)
 694         (gnus-group-get-new-news-this-group))))))
 695
 696 (autoload 'nnimap-request-update-info-internal "nnimap")
 697
 698 (deffoo nnmairix-request-marks (group info &optional server)
 699 ;; propagate info from underlying IMAP folder to nnmairix group
 700 ;; This is currently experimental and must be explicitly activated
 701 ;; with nnmairix-propagate-marks-to-nnmairix-group
 702   (when server
 703     (nnmairix-open-server server))
 704   (let* ((qualgroup (gnus-group-prefixed-name
 705                     group
 706                     (list 'nnmairix nnmairix-current-server)))
 707          (readmarks (gnus-group-get-parameter qualgroup 'readmarks))
 708          (propmarks (gnus-group-get-parameter qualgroup 'propmarks))
 709          (folder (nnmairix-get-backend-folder group server))
 710          (corr (nnmairix-get-numcorr group server))
 711          (docorr (and corr (not (zerop (cadr corr)))))
 712          (folderinfo `(,group 1 ((1 . 1))))
 713          readrange marks)
 714       (when (and propmarks
 715                  nnmairix-propagate-marks-to-nnmairix-groups)
 716         ;; these groups are not subscribed, so we have to ask the back end directly
 717         (if (eq nnmairix-backend 'nnimap)
 718             (nnimap-request-update-info-internal folder folderinfo nnmairix-backend-server)
 719           (nnmairix-call-backend "request-update-info" folder folderinfo nnmairix-backend-server))
 720         ;; set range of read articles
 721         (gnus-info-set-read
 722          info
 723          (if docorr
 724              (nnmairix-map-range
 725               `(lambda (x) (+ x ,(cadr corr)))
 726               (gnus-info-read folderinfo))
 727            (gnus-info-read folderinfo)))
 728         ;; set other marks
 729         (gnus-info-set-marks
 730          info
 731          (if docorr
 732              (mapcar (lambda (cur)
 733                          (cons
 734                           (car cur)
 735                           (nnmairix-map-range
 736                            `(lambda (x) (+ x ,(cadr corr)))
 737                            (list (cadr cur)))))
 738                      (gnus-info-marks folderinfo))
 739            (gnus-info-marks folderinfo))))
 740       (when (eq readmarks 'unread)
 741         (gnus-info-set-read info nil))
 742       (when (eq readmarks 'read)
 743         (gnus-info-set-read info (gnus-active qualgroup))))
 744   t)
 745
 746 (nnoo-define-skeleton nnmairix)
 747
 748
 749 ;;; === Interactive functions
 750
 751 (defun nnmairix-create-search-group (server group query threads)
 752   "Create on SERVER nnmairix search group GROUP with QUERY.
 753 If THREADS is t, include whole threads from found messages.  If
 754 called interactively, user will be asked for parameters."
 755   (interactive
 756    (list
 757     (gnus-server-to-method (car (nnmairix-get-server)))
 758     (read-string "Group name: ")
 759     (read-string "Query: ")
 760     (y-or-n-p "Include threads? ")))
 761   (when (and (stringp query)
 762              (string-match "\\s-" query))
 763     (setq query (split-string query)))
 764   (when (not (listp query))
 765     (setq query (list query)))
 766   (when (and server group query)
 767     (save-excursion
 768       (let ((groupname (gnus-group-prefixed-name group server))
 769             info)
 770         (set-buffer gnus-group-buffer)
 771         (gnus-group-make-group group server)
 772         (gnus-group-set-parameter groupname 'query  query)
 773         (gnus-group-set-parameter groupname 'threads threads)
 774         (nnmairix-update-and-clear-marks groupname)))))
 775
 776 (defun nnmairix-search-interactive ()
 777   "Create mairix search interactively with the minibuffer."
 778   (interactive)
 779   (let ((char-header nnmairix-interactive-query-parameters)
 780         header finished query achar)
 781     (while (not finished)
 782       (while (not achar)
 783         (message "Query (%s): " (nnmairix-create-message-line-for-search))
 784           (setq achar (read-char))
 785           (when (not (assoc achar char-header))
 786             (setq achar nil)))
 787       (setq header (read-string
 788                     (concat "Match " (nth 3 (assoc achar char-header)) " on: ")))
 789         (push  (concat (nth 2 (assoc achar char-header)) ":" header) query)
 790         (setq finished (not (y-or-n-p "Add another search query? "))
 791               achar nil))
 792     (nnmairix-search
 793      (mapconcat 'identity query " ")
 794      (car (nnmairix-get-server))
 795      (y-or-n-p "Include whole threads? "))))
 796
 797 (defun nnmairix-create-search-group-from-message ()
 798   "Interactively create search group with query based on current message."
 799   (interactive)
 800   (let ((char-header nnmairix-interactive-query-parameters)
 801         (server (nnmairix-backend-to-server gnus-current-select-method))
 802          query achar header finished group threads cq)
 803     (when (or (not (gnus-buffer-live-p gnus-article-buffer))
 804               (not (gnus-buffer-live-p gnus-summary-buffer)))
 805       (error "No article or summary buffer"))
 806     (when (not server)
 807       (error "No nnmairix server found for back end %s:%s"
 808              (symbol-name (car gnus-current-select-method))
 809              (nth 1 gnus-current-select-method)))
 810     (while (not finished)
 811       (save-excursion
 812         (gnus-summary-toggle-header 1)
 813         (while (not achar)
 814           (message "Query (%s): " (nnmairix-create-message-line-for-search))
 815           (setq achar (read-char))
 816           (when (not (assoc achar char-header))
 817             (setq achar nil)))
 818         (set-buffer gnus-article-buffer)
 819         (setq header nil)
 820         (when (setq cq (nth 1 (assoc achar char-header)))
 821           (setq header
 822                 (nnmairix-replace-illegal-chars
 823                  (gnus-fetch-field (nth 1 (assoc achar char-header))))))
 824         (setq header (read-string
 825                       (concat "Match " (nth 3 (assoc achar char-header)) " on: ")
 826                       header))
 827         (push  (concat (nth 2 (assoc achar char-header)) ":" header) query)
 828         (setq finished (not (y-or-n-p "Add another search query? "))
 829               achar nil)))
 830     (setq threads (y-or-n-p "Include whole threads? "))
 831     (setq group (read-string "Group name: "))
 832     (set-buffer gnus-summary-buffer)
 833     (message "Creating group %s on server %s with query %s." group
 834              (gnus-method-to-server server) (mapconcat 'identity query " "))
 835     (nnmairix-create-search-group server group query threads)))
 836
 837 (defun nnmairix-create-server-and-default-group ()
 838   "Interactively create new nnmairix server with default search group.
 839 All necessary information will be queried from the user."
 840   (interactive)
 841   (let* ((name (read-string "Name of the mairix server: "))
 842         (server (gnus-completing-read "Back end server"
 843                                  (nnmairix-get-valid-servers) t))
 844         (mairix (read-string "Command to call mairix: " "mairix"))
 845         (defaultgroup (read-string "Default search group: "))
 846         (backend (symbol-name (car (gnus-server-to-method server))))
 847         (servername (nth 1 (gnus-server-to-method server)))
 848         (hidden (and (string-match "^nn\\(imap\\|maildir\\)$" backend)
 849                      (y-or-n-p
 850                       "Does the back end server work with maildir++ (i.e. hidden directories)? ")))
 851         create)
 852
 853     (apply (intern (format "%s-%s" backend "open-server"))
 854            (list servername))
 855
 856     (when (and hidden
 857                (string-match "^\\." defaultgroup))
 858       (setq defaultgroup (substring defaultgroup 1)))
 859     ;; Create default search group
 860     (gnus-group-make-group
 861      defaultgroup (list 'nnmairix name  (list 'nnmairix-backend (intern backend))
 862                         (list 'nnmairix-backend-server servername)
 863                         (list 'nnmairix-mairix-command mairix)
 864                         (list 'nnmairix-hidden-folders hidden)
 865                         (list 'nnmairix-default-group defaultgroup)))))
 866
 867 (defun nnmairix-group-change-query-this-group (&optional query)
 868   "Set QUERY for group under cursor."
 869   (interactive)
 870   (let* ((group (gnus-group-group-name))
 871          (method (gnus-find-method-for-group group))
 872          (oldquery (gnus-group-get-parameter group 'query t)))
 873     (if (eq (car method) 'nnmairix)
 874         (progn
 875           (when (listp oldquery)
 876             (setq oldquery (mapconcat 'identity oldquery " ")))
 877           (setq query (or query
 878                           (read-string "New query: " oldquery)))
 879           (when (stringp query)
 880             (setq query (split-string query)))
 881           (when query
 882             (gnus-group-set-parameter group 'query query)
 883             (nnmairix-update-and-clear-marks group)))
 884       (error "This is no nnmairix group"))))
 885
 886
 887 (defun nnmairix-group-toggle-threads-this-group (&optional threads)
 888   "Toggle threads parameter for this group.
 889 If THREADS is a positive number, set threads parameter to t.
 890 If THREADS is a negative number, set it to nil."
 891   (interactive)
 892   (let ((group (gnus-group-group-name)))
 893     (when (nnmairix-group-toggle-parameter
 894            group 'threads "Threads" threads)
 895       (nnmairix-update-and-clear-marks group))))
 896
 897 (defun nnmairix-group-toggle-propmarks-this-group (&optional propmarks)
 898   "Toggle marks propagation for this group.
 899 If PROPMARKS is a positive number, set parameter to t.
 900 If PROPMARKS is a negative number, set it to nil."
 901   (interactive)
 902   (unless (nnmairix-check-mairix-version "maildirpatch")
 903     (error "You need a mairix binary with maildir patch to use this feature.  See docs for details"))
 904   (let ((group (gnus-group-group-name)))
 905     (when (or (not (string= (gnus-group-short-name group)
 906                             (cadr (assoc 'nnmairix-default-group
 907                                         (gnus-find-method-for-group group)))))
 908               (y-or-n-p "You should not activate marks propagation for the default \
 909 search group.  Are you sure? "))
 910       (nnmairix-group-toggle-parameter
 911        group 'propmarks "Marks propagation" propmarks))))
 912
 913 (defun nnmairix-group-toggle-allowfast-this-group (&optional allowfast)
 914   "Toggle fast entering for this group.
 915 If ALLOWFAST is a positive number, set parameter to t.
 916 If ALLOWFAST is a negative number, set it to nil."
 917   (interactive)
 918   (nnmairix-group-toggle-parameter
 919    (gnus-group-group-name) 'allow-fast "Fast entering" allowfast))
 920
 921
 922 (defun nnmairix-group-toggle-readmarks-this-group (&optional readmarks)
 923   "Toggle read/unread marks for this group.
 924 If READMARKS is a positive number, articles will always be read.
 925 If READMARKS is a negative number, articles will always be unread.
 926 If READMARKS is t or zero, marks will stay unchanged."
 927   (interactive)
 928   (let*  ((group (gnus-group-group-name))
 929           (method (gnus-find-method-for-group group))
 930           (readmarks (or readmarks
 931                          (gnus-group-get-parameter group 'readmarks))))
 932     (if (eq (car method) 'nnmairix)
 933         (cond
 934          ((or (and (numberp readmarks) (< readmarks 0))
 935               (eq readmarks 'read))
 936           (gnus-group-set-parameter group 'readmarks 'unread)
 937           (nnheader-message 3 "Articles in %s always unread." group))
 938          ((or (and (numberp readmarks) (> readmarks 0))
 939               (not readmarks))
 940               (gnus-group-set-parameter group 'readmarks 'read)
 941               (nnheader-message 3 "Articles in %s always read." group))
 942          (t
 943           (gnus-group-set-parameter group 'readmarks nil)
 944           (nnheader-message 3 "Read marks in %s stay unchanged." group)))
 945       (error "This is no nnmairix group"))))
 946
 947
 948 (defun nnmairix-search (query &optional server threads)
 949   "Sends QUERY to nnmairix backend SERVER, using default its search group.
 950
 951 Default search group is automatically entered and results are shown.
 952 If THREADS is t, enable threads.
 953 If THREADS is a negative number, disable threads.
 954 Otherwise, leave threads parameter as it is."
 955   (interactive (list (read-string "Query: ")))
 956   (when (not server)
 957     (setq server (car (nnmairix-get-server))))
 958   (if (not server)
 959       (error "No opened nnmairix server found")
 960     (setq server (gnus-server-to-method server)))
 961   (nnmairix-open-server (nth 1 server))
 962   (let* ((qualgroup (gnus-group-prefixed-name nnmairix-default-group
 963                                               (list 'nnmairix (nth 1 server)))))
 964     (set-buffer gnus-group-buffer)
 965     (when (stringp query)
 966       (setq query (split-string query)))
 967     (gnus-group-set-parameter qualgroup 'query query)
 968     (if (symbolp threads)
 969         (when (eq threads 't)
 970           (gnus-group-set-parameter qualgroup 'threads t))
 971       (when (< threads 0)
 972         (gnus-group-set-parameter qualgroup 'threads nil)))
 973     (nnmairix-update-and-clear-marks qualgroup)
 974     (unless (equal (gnus-active qualgroup) '(1 . 0))
 975       (gnus-group-read-group nil t qualgroup))))
 976
 977 (defun nnmairix-search-thread-this-article ()
 978   "Search thread for the current article.
 979 This is effectively a shortcut for calling `nnmairix-search'
 980 with m:msgid of the current article and enabled threads."
 981   (interactive)
 982   (let* ((server
 983           (nnmairix-backend-to-server gnus-current-select-method))
 984          mid)
 985     (if server
 986         (if (gnus-buffer-live-p gnus-article-buffer)
 987             (progn
 988               (with-current-buffer gnus-article-buffer
 989                 (gnus-summary-toggle-header 1)
 990                 (setq mid (message-fetch-field "Message-ID")))
 991               (while (string-match "[<>]" mid)
 992                 (setq mid (replace-match "" t t mid)))
 993               (nnmairix-search (concat "m:" mid) server t))
 994           (message "No article buffer."))
 995       (error "No nnmairix server found for back end %s:%s"
 996              (symbol-name (car gnus-current-select-method))
 997              (nth 1 gnus-current-select-method)))))
 998
 999 (defun nnmairix-search-from-this-article ()
1000   "Search messages from sender of the current article.
1001 This is effectively a shortcut for calling `nnmairix-search' with
1002 f:current_from."
1003   (interactive)
1004   (let* ((server
1005           (nnmairix-backend-to-server gnus-current-select-method))
1006          from)
1007     (if server
1008         (if (gnus-buffer-live-p gnus-article-buffer)
1009             (progn
1010               (with-current-buffer gnus-article-buffer
1011                 (gnus-summary-toggle-header 1)
1012                 (setq from (cadr (gnus-extract-address-components
1013                                   (gnus-fetch-field "From"))))
1014                 (nnmairix-search (concat "f:" from) server -1)))
1015           (message "No article buffer."))
1016       (error "No nnmairix server found for back end %s:%s"
1017              (symbol-name (car gnus-current-select-method))
1018              (nth 1 gnus-current-select-method)))))
1019
1020
1021 (defun nnmairix-purge-old-groups (&optional dontask server)
1022   "Delete mairix search groups which are no longer used.
1023
1024 You may want to call this from time to time if you are creating
1025 and deleting lots of nnmairix groups.  If DONTASK is t, do not ask
1026 before deleting a group on the back end.  SERVER specifies nnmairix server."
1027   (interactive)
1028   (let ((server (or server
1029                     (gnus-server-to-method (car (nnmairix-get-server))))))
1030     (if (nnmairix-open-server (nth 1 server))
1031         (when (nnmairix-call-backend
1032                "request-list" nnmairix-backend-server)
1033           (let (cur qualgroup folder)
1034             (with-current-buffer nntp-server-buffer
1035               (goto-char (point-min))
1036               (while (re-search-forward nnmairix-group-regexp (point-max) t)
1037                 (setq cur (match-string 0)
1038                       qualgroup (gnus-group-prefixed-name
1039                                  (match-string 1) server))
1040                 (when (not (and (gnus-group-entry qualgroup)
1041                                 (string= cur
1042                                          (gnus-group-get-parameter
1043                                           qualgroup 'folder))))
1044                   (when (or dontask
1045                             (y-or-n-p
1046                              (concat "Delete group " cur
1047                                      " on server " nnmairix-backend-server "? ")))
1048                     (nnmairix-call-backend
1049                      "request-delete-group" cur t nnmairix-backend-server)))))))
1050       (message "Couldn't open server %s" (nth 1 server)))))
1051
1052
1053 (defun nnmairix-update-database (&optional servers)
1054   "Call mairix for updating the database for SERVERS.
1055
1056 If SERVERS is nil, do update for all nnmairix servers.  Mairix
1057 will be called asynchronously unless
1058 `nnmairix-mairix-synchronous-update' is t.  Mairix will be called
1059 with `nnmairix-mairix-update-options'."
1060   (interactive)
1061   (let ((servers (or servers
1062                      (nnmairix-get-nnmairix-servers)))
1063         args cur commandsplit)
1064     (while servers
1065       (setq cur (car (pop servers)))
1066       (nnmairix-open-server
1067        (nth 1 (gnus-server-to-method cur)))
1068       (setq commandsplit (split-string nnmairix-mairix-command))
1069       (nnheader-message 7 "Updating mairix database for %s..." cur)
1070       (if nnmairix-mairix-synchronous-update
1071           (progn
1072             (setq args (append (list (car commandsplit) nil
1073                                      (get-buffer nnmairix-mairix-output-buffer)
1074                                      nil)))
1075             (if (> (length commandsplit) 1)
1076                 (setq args (append args (cdr commandsplit) nnmairix-mairix-update-options))
1077               (setq args (append args nnmairix-mairix-update-options)))
1078             (apply 'call-process args)
1079             (nnheader-message 7 "Updating mairix database for %s... done" cur))
1080         (progn
1081           (setq args (append (list cur (get-buffer nnmairix-mairix-output-buffer)
1082                                    (car commandsplit))))
1083           (if (> (length commandsplit) 1)
1084               (setq args (append args (cdr commandsplit) nnmairix-mairix-update-options))
1085             (setq args (append args nnmairix-mairix-update-options)))
1086           (set-process-sentinel (apply 'start-process args)
1087                                 'nnmairix-sentinel-mairix-update-finished))))))
1088
1089 (defun nnmairix-group-delete-recreate-this-group ()
1090   "Deletes and recreates group on the back end.
1091 You can use this function on nnmairix groups which continuously
1092 show wrong article counts."
1093   (interactive)
1094   (let* ((group (gnus-group-group-name))
1095          (method (gnus-find-method-for-group group)))
1096     (unless (eq (car method) 'nnmairix)
1097       (error "This is not a nnmairix group"))
1098     (when (y-or-n-p
1099            (format "Really recreate group %s on the back end? " group))
1100       (nnmairix-delete-recreate-group group)
1101       (gnus-group-get-new-news-this-group))))
1102
1103 (defun nnmairix-propagate-marks (&optional server)
1104   "Propagate marks from nnmairix group to original articles.
1105 Unless SERVER is explicitly specified, will use the last opened
1106 nnmairix server. Only marks from current session will be set."
1107   (interactive)
1108   (if server
1109       (nnmairix-open-server server)
1110     (unless (eq (car gnus-current-select-method) 'nnmairix)
1111       (if nnmairix-current-server
1112           (nnmairix-open-server nnmairix-current-server)
1113         (error "No opened nnmairix server"))))
1114   (if nnmairix-marks-cache
1115       (let (number ogroup number-cache method mid-marks temp)
1116         ;; first we get the article numbers
1117         (catch 'problem
1118           (while (setq ogroup (pop nnmairix-marks-cache))
1119             (while (setq mid-marks (pop (cdr ogroup)))
1120               (setq number
1121                     (cdr
1122                      (gnus-request-head (car mid-marks) (car ogroup))))
1123               (unless number
1124                 (nnheader-message
1125                  3 "Unable to set mark: couldn't determine article number for %s in %s"
1126                  (car mid-marks) (car ogroup))
1127                 (throw 'problem nil))
1128               (setq temp (assoc (car ogroup) number-cache))
1129               (if temp
1130                   (catch 'done
1131                     (dolist (cur (cdr temp))
1132                       (when (equal (cdr cur) (list (nth 1 mid-marks) (nth 2 mid-marks)))
1133                         (nconc (car cur) (list number))
1134                         (throw 'done nil)))
1135                     (nconc temp (list (list (list number) (nth 1 mid-marks) (nth 2 mid-marks)))))
1136                 (push (list (car ogroup) (list (list number) (nth 1 mid-marks) (nth 2 mid-marks)))
1137                       number-cache)))))
1138         ;; now we set the marks
1139         (with-current-buffer gnus-group-buffer
1140           (nnheader-message 5 "nnmairix: Propagating marks...")
1141           (dolist (cur number-cache)
1142             (setq method (gnus-find-method-for-group (car cur)))
1143             (apply (intern (format "%s-%s"
1144                                    (symbol-name (car method))
1145                                    "request-set-mark"))
1146                    (gnus-group-short-name (car cur))
1147                    (cdr cur)
1148                    (list (nth 1 method)))
1149             (gnus-group-jump-to-group (car cur))
1150             (gnus-group-get-new-news-this-group)))
1151         (nnheader-message 5 "nnmairix: Propagating marks... done"))
1152     (nnheader-message 3 "No marks to propagate.")))
1153
1154 (defun nnmairix-update-groups (servername &optional skipdefault updatedb)
1155   "Update all search groups on SERVERNAME.
1156 If SKIPDEFAULT is t, the default search group will not be
1157 updated.
1158 If UPDATEDB is t, database for SERVERNAME will be updated first."
1159   (interactive (list (gnus-completing-read "Update groups on server"
1160                                 (nnmairix-get-nnmairix-servers))))
1161   (save-excursion
1162     (when (string-match ".*:\\(.*\\)" servername)
1163       (setq servername (match-string 1 servername)))
1164     (if (not (assoc (format "nnmairix:%s" servername)
1165                     (nnmairix-get-nnmairix-servers)))
1166         (nnheader-message 3 "Server %s not opened" servername)
1167       (when updatedb
1168         (let ((nnmairix-mairix-synchronous-update t))
1169           (nnmairix-update-database
1170            (list (list (format "nnmairix:%s" servername))))))
1171       (let ((groups (nnmairix-get-groups-from-server servername))
1172             default)
1173         (when skipdefault
1174           (setq default
1175                 (format "nnmairix+%s:%s"
1176                         servername
1177                         (cadr
1178                          (assoc 'nnmairix-default-group
1179                                 (gnus-server-to-method
1180                                  (format "nnmairix:%s" servername)))))))
1181         (dolist (cur groups)
1182           (unless (and skipdefault
1183                        (string= (car cur) default))
1184             (gnus-group-jump-to-group (car cur))
1185             (gnus-group-mark-group 1)))
1186         (gnus-group-get-new-news-this-group)))))
1187
1188 (defun nnmairix-remove-tick-mark-original-article ()
1189   "Remove tick mark from original article.
1190 Marks propagation has to be enabled for this to work."
1191   (interactive)
1192   (unless (eq (car gnus-current-select-method) 'nnmairix)
1193     (error "Not in a nnmairix group"))
1194   (save-excursion
1195     (let ((mid (mail-header-message-id (gnus-summary-article-header)))
1196           groups cur)
1197       (when mid
1198         (setq groups (nnmairix-determine-original-group-from-registry mid))
1199         (unless (or groups
1200                     nnmairix-only-use-registry)
1201           (setq groups
1202                 (nnmairix-determine-original-group-from-path mid nnmairix-current-server)))
1203         (unless groups
1204           (error "Couldn't find original article"))
1205         (dolist (cur groups)
1206           (push `(,cur (,mid del (tick))) nnmairix-marks-cache))
1207         (nnheader-message 5 "Will remove tick mark for %s upon closing." mid)))))
1208
1209 ;;; ==== Helper functions
1210
1211 (defun nnmairix-request-group-with-article-number-correction (folder qualgroup)
1212   "Request FOLDER on back end for nnmairix QUALGROUP and article number correction."
1213   (save-excursion
1214     (nnmairix-call-backend "request-group" folder nnmairix-backend-server)
1215     (set-buffer nnmairix-mairix-output-buffer)
1216     (goto-char (point-min))
1217     (re-search-forward "^Matched.*messages")
1218     (nnheader-message 7 (match-string 0))
1219     (set-buffer nntp-server-buffer)
1220     (goto-char (point-min))
1221     (let ((status (read (current-buffer)))
1222           (total (read (current-buffer)))
1223           (low (read (current-buffer)))
1224           (high (read (current-buffer)))
1225           (corr (gnus-group-get-parameter qualgroup 'numcorr t)))
1226       (if (= status 211)
1227           (progn
1228             ;; Article number correction
1229             (if (and corr
1230                      (> (+ (car (cddr corr)) high) 0))
1231                 (progn
1232                   (when (car corr) ;Group has changed
1233                     (setq corr
1234                           (list nil
1235                                 (car (cddr corr))
1236                                 (+ (car (cddr corr)) high)))
1237                     (gnus-group-set-parameter
1238                      qualgroup 'numcorr corr))
1239                   (setq low (+ low (cadr corr))
1240                         high (+ high (cadr corr))))
1241               (when (member nnmairix-backend
1242                             nnmairix-delete-and-create-on-change)
1243                 (gnus-group-set-parameter
1244                  qualgroup 'numcorr (list nil 0 high))))
1245             (erase-buffer)
1246             (insert (format "%d %d %d %d %s" status total low high
1247                             (gnus-group-real-name qualgroup)))
1248             t)
1249         (progn
1250           (nnheader-report
1251            'nnmairix "Error calling back end on group %s" folder)
1252           nil)))))
1253
1254 (defun nnmairix-call-mairix-binary (command folder searchquery threads)
1255   "Call mairix binary with COMMAND, using FOLDER and SEARCHQUERY.
1256 If THREADS is non-nil, enable full threads."
1257   (let ((args (cons (car command) '(nil t nil))))
1258     (with-current-buffer
1259        (get-buffer-create nnmairix-mairix-output-buffer)
1260       (erase-buffer)
1261       (when (> (length command) 1)
1262         (setq args (append args (cdr command))))
1263       (when nnmairix-mairix-search-options
1264         (setq args (append args nnmairix-mairix-search-options)))
1265       ;; If we have a patched mairix binary, call it with "-c"
1266       (when (nnmairix-check-mairix-version "maildirpatch")
1267         (setq args (append args '("-c"))))
1268       (when threads
1269         (setq args (append args '("-t"))))
1270       (apply 'call-process
1271              (append args (list "-o" folder) searchquery)))))
1272
1273 (defun nnmairix-call-mairix-binary-raw (command query)
1274   "Call mairix binary with COMMAND and QUERY in raw mode."
1275   (let ((args (cons (car command) '(nil t nil))))
1276     (with-current-buffer
1277        (get-buffer-create nnmairix-mairix-output-buffer)
1278       (erase-buffer)
1279       (when (> (length command) 1)
1280         (setq args (append args (cdr command))))
1281       (setq args (append args '("-r")))
1282       (apply 'call-process
1283              (append args query)))))
1284
1285 (defun nnmairix-get-server ()
1286   "If there exists just one nnmairix server, return its value.
1287 Otherwise, ask user for server."
1288   (let ((openedserver (nnmairix-get-nnmairix-servers)))
1289     (when (not openedserver)
1290       (error "No opened nnmairix server found"))
1291     (if (> (length openedserver) 1)
1292         (progn
1293           (while
1294               (equal '("")
1295                   (setq nnmairix-last-server
1296                         (list (gnus-completing-read "Server" openedserver t
1297                                                (or nnmairix-last-server
1298                                                    "nnmairix:"))))))
1299           nnmairix-last-server)
1300       (car openedserver))))
1301
1302 (defun nnmairix-get-nnmairix-servers (&optional all)
1303   "Return available nnmairix servers.
1304 If ALL is t, return also the unopened/failed ones."
1305   (let ((alist gnus-opened-servers)
1306         server openedserver)
1307     (while alist
1308       (setq server (pop alist))
1309       (when (and server
1310                  (or all
1311                      (eq (cadr server) 'ok))
1312                  (eq (caar server) 'nnmairix)
1313                  (not (member (car server) gnus-ephemeral-servers)))
1314         (setq server
1315               (concat (symbol-name (caar server)) ":" (nth 1 (car server))))
1316         (push (list server) openedserver)))
1317     openedserver))
1318
1319 (defun nnmairix-get-valid-servers ()
1320   "Return list of valid back end servers for nnmairix groups."
1321   (let ((alist gnus-opened-servers)
1322         (mairixservers (nnmairix-get-nnmairix-servers t))
1323         server mserver openedserver occ cur)
1324     ;; Get list of all nnmairix backends (i.e. backends which are
1325     ;; already occupied)
1326     (dolist (cur mairixservers)
1327       (push
1328        (concat
1329         (symbol-name
1330          (cadr (assoc 'nnmairix-backend
1331                       (gnus-server-to-method (car cur)))))
1332          ":"
1333          (cadr (assoc 'nnmairix-backend-server
1334                       (gnus-server-to-method (car cur)))))
1335         occ))
1336     (while alist
1337       (setq server (pop alist))
1338       (setq mserver (gnus-method-to-server (car server)))
1339       ;; If this is the native server, convert it to the real server
1340       ;; name to avoid confusion
1341       (when (string= mserver "native")
1342         (setq mserver (format "%s:%s"
1343                               (caar server)
1344                               (nth 1 (car server)))))
1345       (when (and server
1346                  (eq (cadr server) 'ok)
1347                  (member (caar server) nnmairix-valid-backends)
1348                  (not (member (car server) gnus-ephemeral-servers))
1349                  (not (member (gnus-method-to-server (car server)) occ)))
1350         (push
1351          mserver
1352          openedserver)))
1353     openedserver))
1354
1355 (defun nnmairix-get-groups-from-server (servername)
1356   "Return all groups for nnmairix server SERVERNAME."
1357   (let ((searchstring (format "nnmairix\\+%s:" servername))
1358         groups)
1359     (dolist (cur gnus-newsrc-alist)
1360       (when (string-match searchstring
1361                           (car cur))
1362         (push (list (car cur)) groups)))
1363     groups))
1364
1365 (defun nnmairix-call-backend (func &rest args)
1366   "Call a function FUNC on backend with ARGS."
1367   (apply (intern (format "%s-%s" (symbol-name nnmairix-backend) func)) args))
1368
1369 (defun nnmairix-get-backend-folder (group &optional server)
1370   "Return back end GROUP from nnmairix group on SERVER."
1371   (let* ((qualgroup (if server
1372                         (gnus-group-prefixed-name group (list 'nnmairix server))
1373                       group))
1374          (folder (gnus-group-get-parameter qualgroup 'folder)))
1375     folder))
1376
1377 (defun nnmairix-get-numcorr (group &optional server)
1378   "Return values for article number correction nnmairix GROUP on SERVER."
1379   (let* ((qualgroup (if server
1380                         (gnus-group-prefixed-name group (list 'nnmairix server))
1381                       group))
1382          (corr (gnus-group-get-parameter qualgroup 'numcorr t)))
1383     corr))
1384
1385
1386 (defun nnmairix-rename-files-consecutively (path)
1387   "Rename all nnml mail files in PATH so that they have consecutive numbers.
1388 This should correct problems of wrong article counts when using
1389 nnmairix with nnml backends."
1390   (let* ((files
1391          (sort
1392           (mapcar 'string-to-number
1393                   (directory-files path nil "[0-9]+" t))
1394           '<))
1395          (lastplusone (car files))
1396          (path (file-name-as-directory path)))
1397     (dolist (cur files)
1398       (when (not (= cur lastplusone))
1399         (rename-file (concat path
1400                              (number-to-string cur))
1401                      (concat path
1402                              (number-to-string lastplusone)))
1403         (setq cur lastplusone))
1404       (setq lastplusone (1+ cur)))))
1405
1406 (defun nnmairix-replace-group-and-numbers (articles backendgroup mairixgroup numc type)
1407   "Replace folder names in Xref header and correct article numbers.
1408 Do this for all ARTICLES on BACKENDGROUP.  Replace using
1409 MAIRIXGROUP.  NUMC contains values for article number correction.
1410 TYPE is either 'nov or 'headers."
1411   (nnheader-message 7 "nnmairix: Rewriting headers...")
1412   (cond
1413    ((eq type 'nov)
1414     (let ((buf (get-buffer-create " *nnmairix buffer*"))
1415           (corr (not (zerop numc)))
1416           (name (buffer-name nntp-server-buffer))
1417           header cur xref)
1418       (with-current-buffer buf
1419         (erase-buffer)
1420         (set-buffer nntp-server-buffer)
1421         (goto-char (point-min))
1422         (mapc
1423          (lambda (article)
1424            (when (or (looking-at (number-to-string article))
1425                      (nnheader-find-nov-line article))
1426              (setq cur (nnheader-parse-nov))
1427              (when corr
1428                (setq article (+ (mail-header-number cur) numc))
1429                (mail-header-set-number cur article))
1430              (setq xref (mail-header-xref cur))
1431              (when (and (stringp xref)
1432                         (string-match (format "[ \t]%s:[0-9]+" backendgroup) xref))
1433                (setq xref (replace-match (format " %s:%d" mairixgroup article) t nil xref))
1434                (mail-header-set-xref cur xref))
1435              (set-buffer buf)
1436              (nnheader-insert-nov cur)
1437              (set-buffer nntp-server-buffer)
1438              (when (not (eobp))
1439                (forward-line 1))))
1440          articles)
1441         (kill-buffer nntp-server-buffer)
1442         (set-buffer buf)
1443         (rename-buffer name)
1444         (setq nntp-server-buffer buf))))
1445    ((and (eq type 'headers)
1446          (not (zerop numc)))
1447     (with-current-buffer nntp-server-buffer
1448       (save-excursion
1449         (goto-char (point-min))
1450         (while (re-search-forward "^[23][0-9]+ \\([0-9]+\\)" nil t)
1451           (replace-match (number-to-string
1452                           (+ (string-to-number (match-string 1)) numc))
1453                          t t nil 1))))))
1454   (nnheader-message 7 "nnmairix: Rewriting headers... done"))
1455
1456 (defun nnmairix-backend-to-server (server)
1457   "Return nnmairix server most probably responsible for back end SERVER.
1458 User will be asked if this cannot be determined.  Result is saved in
1459 parameter 'indexed-servers of corresponding default search
1460 group."
1461   (let ((allservers (nnmairix-get-nnmairix-servers))
1462         mairixserver found defaultgroup)
1463     (if (> (length allservers) 1)
1464         (progn
1465           ;; If there is more than one nnmairix server, we go through them
1466           (while (and allservers (not found))
1467             (setq mairixserver (gnus-server-to-method (car (pop allservers))))
1468             ;; First we look if SERVER is the backend of current nnmairix server
1469             (setq found (and (eq (cadr (assoc 'nnmairix-backend mairixserver))
1470                                  (car server))
1471                              (string= (cadr (assoc 'nnmairix-backend-server mairixserver))
1472                                       (nth 1 server))))
1473             ;; If that's not the case, we look at 'indexed-servers
1474             ;; variable in default search group
1475             (when (not found)
1476               (setq defaultgroup (cadr (assoc 'nnmairix-default-group mairixserver)))
1477               (setq found (member (gnus-method-to-server server)
1478                                   (gnus-group-get-parameter
1479                                    (gnus-group-prefixed-name defaultgroup
1480                                                              mairixserver)
1481                                    'indexed-servers t)))))
1482           ;; If still not found, we ask user
1483           (when (not found)
1484             (setq mairixserver
1485                   (gnus-server-to-method
1486                    (gnus-completing-read
1487                     (format "Cannot determine which nnmairix server indexes %s. Please specify"
1488                             (gnus-method-to-server server))
1489                     (nnmairix-get-nnmairix-servers) nil "nnmairix:")))
1490             ;; Save result in parameter of default search group so that
1491             ;; we don't have to ask again
1492             (setq defaultgroup (gnus-group-prefixed-name
1493                                 (cadr (assoc 'nnmairix-default-group mairixserver)) mairixserver))
1494             (gnus-group-set-parameter
1495              defaultgroup
1496              'indexed-servers
1497              (append (gnus-group-get-parameter defaultgroup 'indexed-servers t)
1498                      (list (gnus-method-to-server server)))))
1499           mairixserver)
1500       ;; If there is just one (or none) nnmairix server:
1501       (gnus-server-to-method (caar allservers)))))
1502
1503
1504 (defun nnmairix-delete-recreate-group (group)
1505   "Delete and recreate folder from GROUP on the back end."
1506   (when (member nnmairix-backend nnmairix-delete-and-create-on-change)
1507     (let ((folder (gnus-group-get-parameter group 'folder)))
1508       (if (string-match nnmairix-group-regexp folder)
1509           (progn
1510             (nnmairix-call-backend "open-server"
1511                                    nnmairix-backend-server)
1512             (nnmairix-call-backend "request-delete-group"
1513                                    folder t nnmairix-backend-server)
1514             (nnmairix-call-backend "request-create-group"
1515                                    folder nnmairix-backend-server))
1516         (error "`nnmairix-delete-recreate-group' called on \
1517 non-mairix group.  Check folder parameter")))))
1518
1519 (defun nnmairix-update-and-clear-marks (group &optional method)
1520   "Update group and clear all marks from GROUP using METHOD."
1521   (let ((method (or method
1522                     (gnus-find-method-for-group group)))
1523         (corr (gnus-group-get-parameter group 'numcorr t))
1524         info)
1525     (unless (or (gnus-group-prefixed-p group)
1526                 (not method))
1527       (setq group (gnus-group-prefixed-name group method)))
1528     (if (eq (nth 0 method) 'nnmairix)
1529         (save-excursion
1530           (nnmairix-open-server (nth 1 method))
1531           (set-buffer gnus-group-buffer)
1532           ;; (gnus-group-set-parameter group 'propmarks nil)
1533           (setq info (gnus-get-info group))
1534           ;; Clear active and info
1535           (gnus-set-active group nil)
1536           (gnus-info-clear-data info)
1537           ;; Delete and re-create group if needed
1538           (nnmairix-delete-recreate-group group)
1539           ;; set flag that group has changed for article number correction
1540           (when (member nnmairix-backend nnmairix-delete-and-create-on-change)
1541             (when corr
1542               (setcar corr t)
1543               (gnus-group-set-parameter group 'numcorr corr)))
1544           (gnus-group-jump-to-group group)
1545           (gnus-group-get-new-news-this-group))
1546       (error "`nnmairix-update-and-clear-marks' called with non-nnmairix group"))))
1547
1548 (defun nnmairix-sentinel-mairix-update-finished (proc status)
1549   "Sentinel for mairix update process PROC with STATUS."
1550   (if (equal status "finished\n")
1551       (nnheader-message 7 "Updating mairix database for %s... done" proc)
1552     (error "There was an error updating the mairix database for server %s.  \
1553 See %s for details" proc nnmairix-mairix-output-buffer)))
1554
1555 (defun nnmairix-create-message-line-for-search ()
1556   "Create message line for interactive query in minibuffer."
1557   (mapconcat
1558    (function
1559     (lambda (cur)
1560       (format "%c=%s" (car cur) (nth 3 cur))))
1561    nnmairix-interactive-query-parameters ","))
1562
1563 (defun nnmairix-replace-illegal-chars (header)
1564   "Replace illegal characters in HEADER for mairix query."
1565   (when header
1566     (while (string-match "[^-.@/,& [:alnum:]]" header)
1567       (setq header (replace-match "" t t header)))
1568     (while (string-match "[-& ]" header)
1569       (setq header (replace-match "," t t header)))
1570     header))
1571
1572 (defun nnmairix-group-toggle-parameter (group parameter description &optional par)
1573   "Toggle on GROUP a certain PARAMETER.
1574 DESCRIPTION will be shown to the user with the activation
1575 status.  If PAR is a positive number, the group parameter will be
1576 set to t and to nil otherwise."
1577   (let* ((method (gnus-find-method-for-group group))
1578          (par (or par
1579                   (not (gnus-group-get-parameter group parameter)))))
1580     (if (eq (car method) 'nnmairix)
1581         (progn
1582           (when (numberp par)
1583             (setq par (> par 0)))
1584           (gnus-group-set-parameter group parameter par)
1585           (if par
1586               (message "%s activated for group %s" description group)
1587             (message "%s deactivated for group %s" description group))
1588           t)
1589       (error "This is no nnmairix group")
1590       nil)))
1591
1592 ;; Search for original article helper functions
1593
1594 (defun nnmairix-goto-original-article (&optional no-registry)
1595   "Jump to the original group and display article.
1596 The original group of the article is first determined with the
1597 registry (if enabled).  If the registry is not enabled or did not
1598 find the article or the prefix NO-REGISTRY is non-nil, this
1599 function will try to determine the original group form the path
1600 of the mail file.  The path is obtained through another mairix
1601 search in raw mode."
1602   (interactive "P")
1603   (when (not (eq (car gnus-current-select-method) 'nnmairix))
1604     (let ((method (gnus-find-method-for-group gnus-newsgroup-name)))
1605       (if (eq (car method) 'nnmairix)
1606           (nnmairix-open-server (nth 1 method))
1607         (error "Not in a nnmairix group"))))
1608   (when (not (gnus-buffer-live-p gnus-article-buffer))
1609     (error "No article buffer available"))
1610   (let ((server (nth 1 gnus-current-select-method))
1611         mid rval group allgroups)
1612     ;; get message id
1613     (with-current-buffer gnus-article-buffer
1614       (gnus-summary-toggle-header 1)
1615       (setq mid (message-fetch-field "Message-ID"))
1616       ;; first check the registry (if available)
1617       (unless no-registry
1618         (setq allgroups (nnmairix-determine-original-group-from-registry mid)))
1619       (unless (or allgroups
1620                   nnmairix-only-use-registry)
1621         ;; registry was not available or did not find article
1622         ;; so we search again with mairix in raw mode to get filename
1623         (setq allgroups
1624               (nnmairix-determine-original-group-from-path mid server)))
1625       (if (> (length allgroups) 1)
1626           (setq group
1627                 (gnus-completing-read
1628                  "Message exists in more than one group. Choose"
1629                  allgroups t))
1630         (setq group (car allgroups))))
1631     (if group
1632         ;; show article in summary buffer
1633         (nnmairix-show-original-article group mid)
1634       (nnheader-message 3 "Couldn't find original article"))))
1635
1636 (defun nnmairix-determine-original-group-from-registry (mid)
1637   "Try to determine original group for message-id MID from the registry."
1638   (when (gnus-bound-and-true-p 'gnus-registry-enabled)
1639     (unless (string-match "^<" mid)
1640       (set mid (concat "<" mid)))
1641     (unless (string-match ">$" mid)
1642       (set mid (concat mid ">")))
1643     (gnus-registry-get-id-key mid 'group)))
1644
1645 (defun nnmairix-determine-original-group-from-path (mid server)
1646   "Determine original group(s) for message-id MID from the file path.
1647 The file path is obtained through a mairix search for the id on
1648 SERVER."
1649   (nnmairix-open-server server)
1650   (while (string-match "[<>]" mid)
1651     (setq mid (replace-match "" t t mid)))
1652   ;; mairix somehow does not like '$' in message-id
1653   (when (string-match "\\$" mid)
1654     (setq mid (concat mid "=")))
1655   (while (string-match "\\$" mid)
1656     (setq mid (replace-match "=," t t mid)))
1657   (let (allgroups)
1658     (if (zerop (nnmairix-call-mairix-binary-raw
1659                 (split-string nnmairix-mairix-command)
1660                 (list (concat "m:" mid))))
1661         (with-current-buffer nnmairix-mairix-output-buffer
1662           (goto-char (point-min))
1663           (while (re-search-forward "^/.*$" nil t)
1664             (push (nnmairix-get-group-from-file-path (match-string 0))
1665                   allgroups)
1666             (forward-line 1)))
1667       (error "Mairix could not find original article.  See buffer %s for details"
1668              nnmairix-mairix-output-buffer))
1669     allgroups))
1670
1671 (defun nnmairix-get-group-from-file-path (file)
1672   "Get group by parsing the message location FILE."
1673   (let (path filename serverbase group maildirflag allgroups)
1674     (string-match "^\\(.*\\)/\\(.*?\\)$" file)
1675     (setq path (expand-file-name (match-string 1 file)))
1676     (setq filename (match-string 2 file))
1677     ;; when we deal with maildir, remove cur/new/tmp from path
1678     (setq maildirflag (string-match ".+\\..+\\..+" filename))
1679     (when maildirflag
1680       (setq path
1681             (replace-regexp-in-string
1682              ".*\\(/cur\\|/new\\|/tmp\\)$" "" path t t 1)))
1683     ;; we first check nnml and nnmaildir servers
1684     (setq
1685      group
1686      (catch 'found
1687        (dolist (cur gnus-opened-servers)
1688          (when (or (and (not maildirflag)
1689                         (eq (caar cur) 'nnml))
1690                    (and maildirflag
1691                         (eq (caar cur) 'nnmaildir)))
1692            ;; get base path from server
1693            (if maildirflag
1694                (setq serverbase (cadr (assoc 'directory (car cur))))
1695              (setq serverbase (cadr (assoc 'nnml-directory (car cur))))
1696              (unless serverbase
1697                (setq serverbase nnml-directory)))
1698            (setq serverbase (file-name-as-directory
1699                              (expand-file-name serverbase)))
1700            (when (string-match (concat serverbase "\\(.*\\)") path)
1701              ;; looks good - rest of the path should be the group
1702              (setq group (match-string 1 path))
1703              (when (string-match "/$" group)
1704                (setq group (replace-match "" t t group)))
1705              (unless maildirflag
1706                ;; for nnml: convert slashes to dots
1707                (while (string-match "/" group)
1708                  (setq group (replace-match "." t t group))))
1709              (setq group (gnus-group-prefixed-name group (car cur)))
1710              ;; check whether this group actually exists
1711              (when (gnus-group-entry group)
1712                (throw 'found group)))))))
1713     (unless group
1714       ;; we haven't found it yet --> look for nnimap groups. Assume
1715       ;; last element of the path is the group. This might fail since
1716       ;; IMAP servers may present groups to the client in arbitrary
1717       ;; ways...
1718       (string-match "^.*/\\.?\\(.*\\)$" path)
1719       (setq group (match-string 1 path))
1720       ;; convert dots to slashes (nested group)
1721       (while (string-match "\\." group)
1722         (setq group (replace-match "/" t t group)))
1723       (dolist (cur gnus-opened-servers)
1724         (when (eq (caar cur) 'nnimap)
1725           (when (gnus-group-entry
1726                  (gnus-group-prefixed-name group (car cur)))
1727             (push
1728              (gnus-group-prefixed-name group (car cur))
1729              allgroups))))
1730       (if (> (length allgroups) 1)
1731           (setq group (gnus-completing-read
1732                        "Group %s exists on more than one IMAP server. Choose"
1733                        allgroups t))
1734         (setq group (car allgroups))))
1735     group))
1736
1737 (defun nnmairix-show-original-article (group mid)
1738   "Switch to GROUP and display Article with message-id MID."
1739   (unless (string-match "^<" mid)
1740     (set mid (concat "<" mid)))
1741   (unless (string-match ">$" mid)
1742     (set mid (concat mid ">")))
1743   (when (string-match "Summary" (buffer-name (current-buffer)))
1744     (gnus-summary-exit))
1745   (pop-to-buffer gnus-group-buffer)
1746   (gnus-group-jump-to-group group)
1747   (gnus-summary-read-group group 1 t)
1748   (gnus-summary-refer-article mid)
1749   (gnus-summary-limit-to-headers (format "message-id: %s" mid))
1750   (gnus-summary-select-article)
1751   ;; Force redisplay
1752   (gnus-summary-show-article)
1753   (nnheader-message 5 "Switched to group %s." group))
1754
1755 (defun nnmairix-map-range (func range)
1756   "Map function FUNC on all members of RANGE."
1757   (cond
1758    ((numberp range)
1759     (funcall func range))
1760    (t
1761     (mapcar (lambda (cur)
1762               (cond
1763                ((listp cur)
1764                 (cons
1765                  (funcall func (car cur))
1766                  (funcall func (cdr cur))))
1767                ((numberp cur)
1768                 (funcall func cur))))
1769             range))))
1770
1771 (defun nnmairix-check-mairix-version (version &optional server)
1772   "Check mairix VERSION on SERVER.
1773 If VERSION is a number: specifies the minimum version.
1774 If VERSION is a string: must be contained in mairix version output."
1775   (unless server
1776     (setq server nnmairix-current-server))
1777   (let ((versionstring (cadr (assoc server nnmairix-version-output))))
1778     (unless versionstring
1779       ;; call "mairix -V" to get the version string
1780       (with-temp-buffer
1781         (setq versionstring
1782               (let* ((commandsplit (split-string nnmairix-mairix-command))
1783                      (args (append (list (car commandsplit))
1784                                   `(nil t nil) (cdr commandsplit) '("-V"))))
1785               (apply 'call-process args)
1786               (goto-char (point-min))
1787               (re-search-forward "mairix.*")
1788               (match-string 0))))
1789       ;; save version string for current session
1790       (setq nnmairix-version-output
1791             (append nnmairix-version-output
1792                     (list (list server versionstring)))))
1793     (cond
1794      ((stringp version)
1795       (string-match version versionstring))
1796      ((numberp version)
1797       (<= version (string-to-number
1798                    (progn
1799                      (string-match "mairix \\([0-9\\.]+\\)" versionstring)
1800                      (match-string 1 versionstring))))))))
1801
1802 ;; ==== Widget stuff
1803
1804 (defvar nnmairix-widgets)
1805 (defvar nnmairix-widgets-values nil)
1806
1807 (defun nnmairix-widget-search-from-this-article ()
1808   "Create mairix query based on current article using graphical widgets."
1809   (interactive)
1810   (nnmairix-widget-search
1811    (nnmairix-widget-get-values)))
1812
1813 (defun nnmairix-widget-get-values ()
1814   "Create values for editable fields from current article."
1815   (if (not (gnus-buffer-live-p gnus-article-buffer))
1816       (error "No article buffer available")
1817     (save-excursion
1818       (gnus-summary-toggle-header 1)
1819       (set-buffer gnus-article-buffer)
1820       (mapcar
1821        (function
1822         (lambda (field)
1823           (list (car (cddr field))
1824                 (if (car field)
1825                     (nnmairix-replace-illegal-chars
1826                      (gnus-fetch-field (car field)))
1827                   nil))))
1828        nnmairix-widget-fields-list))))
1829
1830
1831 (defun nnmairix-widget-search (&optional mvalues)
1832   "Create mairix query interactively using graphical widgets.
1833 MVALUES may contain values from current article."
1834   (interactive)
1835   ;; Select window for mairix customization
1836   (funcall nnmairix-widget-select-window-function)
1837   ;; generate widgets
1838   (nnmairix-widget-create-query mvalues)
1839   ;; generate Buttons
1840   (widget-create 'push-button
1841                  :notify
1842                  (if mvalues
1843                      (lambda (&rest ignore)
1844                        (nnmairix-widget-send-query nnmairix-widgets
1845                                                    t))
1846                    (lambda (&rest ignore)
1847                      (nnmairix-widget-send-query nnmairix-widgets
1848                                                  nil)))
1849                  "Send Query")
1850   (widget-insert "   ")
1851   (widget-create 'push-button
1852                  :notify
1853                  (if mvalues
1854                      (lambda (&rest ignore)
1855                        (nnmairix-widget-create-group nnmairix-widgets
1856                                                      t))
1857                    (lambda (&rest ignore)
1858                      (nnmairix-widget-create-group nnmairix-widgets
1859                                                    nil)))
1860                  "Create permanent group")
1861   (widget-insert "   ")
1862   (widget-create 'push-button
1863                  :notify (lambda (&rest ignore)
1864                            (kill-buffer nnmairix-customize-query-buffer))
1865                  "Cancel")
1866   (use-local-map widget-keymap)
1867   (widget-setup)
1868   (goto-char (point-min)))
1869
1870 (defun nnmairix-widget-send-query (widgets &optional withvalues)
1871   "Send query from WIDGETS to mairix binary.
1872 If WITHVALUES is t, query is based on current article."
1873   (nnmairix-search
1874    (nnmairix-widget-make-query-from-widgets widgets)
1875    (if withvalues
1876        (gnus-method-to-server
1877         (nnmairix-backend-to-server gnus-current-select-method))
1878      (car (nnmairix-get-server)))
1879    (if (widget-value (cadr (assoc "Threads" widgets)))
1880        t
1881      -1))
1882   (kill-buffer nnmairix-customize-query-buffer))
1883
1884 (defun nnmairix-widget-create-group (widgets &optional withvalues)
1885   "Create nnmairix group based on current widget values WIDGETS.
1886 If WITHVALUES is t, query is based on current article."
1887   (let ((group (read-string "Name of the group: ")))
1888     (when (not (zerop (length group)))
1889       (nnmairix-create-search-group
1890        (if withvalues
1891            (gnus-method-to-server
1892             (nnmairix-backend-to-server gnus-current-select-method))
1893          (car (nnmairix-get-server)))
1894        group
1895        (nnmairix-widget-make-query-from-widgets widgets)
1896        (widget-value (cadr (assoc "Threads" widgets))))))
1897   (kill-buffer nnmairix-customize-query-buffer))
1898
1899
1900 (defun nnmairix-widget-make-query-from-widgets (widgets)
1901   "Create mairix query from widget values WIDGETS."
1902   (let (query temp flag)
1903     ;; first we do the editable fields
1904     (dolist (cur nnmairix-widget-fields-list)
1905       ;; See if checkbox is checked
1906       (when (widget-value
1907              (cadr (assoc (concat "c" (car (cddr cur))) widgets)))
1908         ;; create query for the field
1909         (push
1910          (concat
1911           (nth 1 cur)
1912           ":"
1913           (nnmairix-replace-illegal-chars
1914            (widget-value
1915            (cadr (assoc (concat "e" (car (cddr cur))) widgets)))))
1916          query)))
1917     ;; Flags
1918     (when (member 'flags nnmairix-widget-other)
1919       (setq flag
1920             (mapconcat
1921              (function
1922               (lambda (flag)
1923                 (setq temp
1924                       (widget-value (cadr (assoc (car flag) nnmairix-widgets))))
1925                 (if (string= "yes" temp)
1926                     (cadr flag)
1927                   (if (string= "no" temp)
1928                       (concat "-" (cadr flag))))))
1929              '(("seen" "s") ("replied" "r") ("flagged" "f")) ""))
1930       (when (not (zerop (length flag)))
1931         (push (concat "F:" flag) query)))
1932     ;; return query string
1933     (mapconcat 'identity query " ")))
1934
1935
1936 (defun nnmairix-widget-create-query (&optional values)
1937   "Create widgets for creating mairix queries.
1938 Fill in VALUES if based on an article."
1939   (let (allwidgets)
1940     (when (get-buffer nnmairix-customize-query-buffer)
1941       (kill-buffer nnmairix-customize-query-buffer))
1942     (switch-to-buffer nnmairix-customize-query-buffer)
1943     (kill-all-local-variables)
1944     (erase-buffer)
1945     (widget-insert "Specify your query for Mairix (check boxes for activating fields):\n\n")
1946     (widget-insert "(Whitespaces will be converted to ',' (i.e. AND). Use '/' for OR.)\n\n")
1947 ;    (make-local-variable 'nnmairix-widgets)
1948     (setq nnmairix-widgets (nnmairix-widget-build-editable-fields values))
1949     (when (member 'flags nnmairix-widget-other)
1950       (widget-insert "\nFlags:\n      Seen:     ")
1951       (nnmairix-widget-add "seen"
1952                            'menu-choice
1953                            :value "ignore"
1954                            '(item "yes") '(item "no") '(item "ignore"))
1955       (widget-insert "      Replied:  ")
1956       (nnmairix-widget-add "replied"
1957                            'menu-choice
1958                            :value "ignore"
1959                            '(item "yes") '(item "no") '(item "ignore"))
1960       (widget-insert "      Ticked:   ")
1961       (nnmairix-widget-add "flagged"
1962                            'menu-choice
1963                            :value "ignore"
1964                            '(item "yes") '(item "no") '(item "ignore")))
1965     (when (member 'threads nnmairix-widget-other)
1966       (widget-insert "\n")
1967       (nnmairix-widget-add "Threads" 'checkbox nil))
1968       (widget-insert " Show full threads\n\n")))
1969
1970 (defun nnmairix-widget-build-editable-fields (values)
1971   "Build editable field widgets in `nnmairix-widget-fields-list'.
1972 VALUES may contain values for editable fields from current article."
1973   ;; how can this be done less ugly?
1974   (let ((ret))
1975     (mapc
1976      (function
1977       (lambda (field)
1978         (setq field (car (cddr field)))
1979         (setq ret
1980               (nconc
1981                (list
1982                 (list
1983                  (concat "c" field)
1984                  (widget-create 'checkbox
1985                                 :tag field
1986                                 :notify (lambda (widget &rest ignore)
1987                                           (nnmairix-widget-toggle-activate widget))
1988                                 nil)))
1989                (list
1990                 (list
1991                  (concat "e" field)
1992                  (widget-create 'editable-field
1993                                 :size 60
1994                                 :format (concat " " field ":"
1995                                                 (make-string (- 11 (length field)) ?\ )
1996                                                 "%v")
1997                                 :value (or (cadr (assoc field values)) ""))))
1998                ret))
1999         (widget-insert "\n")
2000         ;; Deactivate editable field
2001         (widget-apply (cadr (nth 1 ret)) :deactivate)))
2002      nnmairix-widget-fields-list)
2003     ret))
2004
2005 (defun nnmairix-widget-add (name &rest args)
2006   "Add a widget NAME with optional ARGS."
2007   (push
2008    (list name
2009          (apply 'widget-create args))
2010    nnmairix-widgets))
2011
2012 (defun nnmairix-widget-toggle-activate (widget)
2013   "Toggle activation status of WIDGET depending on corresponding checkbox value."
2014   (let ((field (widget-get widget :tag)))
2015     (if (widget-value widget)
2016         (widget-apply
2017          (cadr (assoc (concat "e" field) nnmairix-widgets))
2018          :activate)
2019       (widget-apply
2020        (cadr (assoc (concat "e" field) nnmairix-widgets))
2021        :deactivate)))
2022   (widget-setup))
2023
2024 (provide 'nnmairix)
2025
2026 ;;; nnmairix.el ends here