--- /dev/null
+;;; nnir.el --- search mail with various search engines
+;; Copyright (C) 1998 Kai Großjohann
+
+;; $Id: nnir.el,v 1.72 2001/08/17 11:15:13 grossjoh Exp $
+
+;; Author: Kai Großjohann <grossjohann@ls6.cs.uni-dortmund.de>
+;; Keywords: news, mail, searching, ir, glimpse, wais
+
+;; This file is not part of GNU Emacs.
+
+;; This is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;; The most recent version of this can always be fetched from the
+;; following FTP site:
+;; ls6-ftp.cs.uni-dortmund.de:/pub/src/emacs
+
+;; This code is still in the development stage but I'd like other
+;; people to have a look at it. Please do not hesitate to contact me
+;; with your ideas.
+
+;; What does it do? Well, it allows you to index your mail using some
+;; search engine (freeWAIS-sf and Glimpse are currently supported),
+;; then type `G G' in the Group buffer and issue a query to the search
+;; engine. You will then get a buffer which shows all articles
+;; matching the query, sorted by Retrieval Status Value (score).
+
+;; When looking at the retrieval result (in the Summary buffer) you
+;; can type `G T' (aka M-x gnus-summary-nnir-goto-thread RET) on an
+;; article. You will be teleported into the group this article came
+;; from, showing the thread this article is part of. (See below for
+;; restrictions.)
+
+;; The Lisp installation is simple: just put this file on your
+;; load-path, byte-compile it, and load it from ~/.gnus or something.
+;; This will install a new command `G G' in your Group buffer for
+;; searching your mail. Note that you also need to configure a number
+;; of variables, as described below.
+
+;; Restrictions:
+;;
+;; * Currently, this expects that you use nnml or another
+;; one-file-per-message backend.
+;; * It can only search one mail backend.
+;; * There are restrictions to the Glimpse setup.
+;; * There are restrictions to the Wais setup.
+;; * gnus-summary-nnir-goto-thread: Fetches whole group first, before
+;; limiting to the right articles. This is much too slow, of
+;; course. May issue a query for number of articles to fetch; you
+;; must accept the default of all articles at this point or things
+;; may break.
+
+;; The Lisp setup involves setting a few variables and setting up the
+;; search engine. The first variable to set is `nnir-mail-backend'.
+;; For me, `gnus-secondary-select-methods' contains just one select
+;; method, and this is also what I put in `nnir-mail-backend'. Type
+;; `C-h v nnir-mail-backend RET' for more information -- the variable
+;; documentation includes more details and a few examples. The second
+;; variable to set is `nnir-search-engine'. Choose one of the engines
+;; listed in `nnir-engines'. (Actually `nnir-engines' is an alist,
+;; type `C-h v nnir-engines RET' for more information; this includes
+;; examples for setting `nnir-search-engine', too.)
+
+;; You must also set up a search engine. I'll tell you about the two
+;; search engines currently supported:
+
+;; 1. freeWAIS-sf
+;;
+;; As always with freeWAIS-sf, you need a so-called `format file'. I
+;; use the following file:
+;;
+;; ,-----
+;; | # Kai's format file for freeWAIS-sf for indexing mails.
+;; | # Each mail is in a file, much like the MH format.
+;; |
+;; | # Document separator should never match -- each file is a document.
+;; | record-sep: /^@this regex should never match@$/
+;; |
+;; | # Searchable fields specification.
+;; |
+;; | region: /^[sS]ubject:/ /^[sS]ubject: */
+;; | subject "Subject header" stemming TEXT BOTH
+;; | end: /^[^ \t]/
+;; |
+;; | region: /^([tT][oO]|[cC][cC]):/ /^([tT][oO]|[cC][cC]): */
+;; | to "To and Cc headers" SOUNDEX BOTH
+;; | end: /^[^ \t]/
+;; |
+;; | region: /^[fF][rR][oO][mM]:/ /^[fF][rR][oO][mM]: */
+;; | from "From header" SOUNDEX BOTH
+;; | end: /^[^ \t]/
+;; |
+;; | region: /^$/
+;; | stemming TEXT GLOBAL
+;; | end: /^@this regex should never match@$/
+;; `-----
+;;
+;; 1998-07-22: waisindex would dump core on me for large articles with
+;; the above settings. I used /^$/ as the end regex for the global
+;; field. That seemed to work okay.
+
+;; There is a Perl module called `WAIS.pm' which is available from
+;; CPAN as well as ls6-ftp.cs.uni-dortmund.de:/pub/wais/Perl. This
+;; module comes with a nifty tool called `makedb', which I use for
+;; indexing. Here's my `makedb.conf':
+;;
+;; ,-----
+;; | # Config file for makedb
+;; |
+;; | # Global options
+;; | waisindex = /usr/local/bin/waisindex
+;; | wais_opt = -stem -t fields
+;; | # `-stem' option necessary when `stemming' is specified for the
+;; | # global field in the *.fmt file
+;; |
+;; | # Own variables
+;; | homedir = /home/kai
+;; |
+;; | # The mail database.
+;; | database = mail
+;; | files = `find $homedir/Mail -name \*[0-9] -print`
+;; | dbdir = $homedir/.wais
+;; | limit = 100
+;; `-----
+;;
+;; The Lisp setup involves the `nnir-wais-*' variables. The most
+;; difficult to understand variable is probably
+;; `nnir-wais-remove-prefix'. Here's what it does: the output of
+;; `waissearch' basically contains the file name and the (full)
+;; directory name. As Gnus works with group names rather than
+;; directory names, the directory name is transformed into a group
+;; name as follows: first, a prefix is removed from the (full)
+;; directory name, then all `/' are replaced with `.'. The variable
+;; `nnir-wais-remove-prefix' should contain a regex matching exactly
+;; this prefix. It defaults to `$HOME/Mail/' (note the trailing
+;; slash).
+
+;; 2. Glimpse
+;;
+;; The code expects you to have one Glimpse index which contains all
+;; your mail files. The Lisp setup involves setting the
+;; `nnir-glimpse-*' variables. The most difficult to understand
+;; variable is probably `nnir-glimpse-remove-prefix', it corresponds
+;; to `nnir-wais-remove-prefix', see above. The `nnir-glimpse-home'
+;; variable should be set to the value of the `-H' option which allows
+;; one to search this Glimpse index. I have indexed my whole home
+;; directory with Glimpse, so I assume a default of `$HOME'.
+
+;; 3. Namazu
+;;
+;; The Namazu backend requires you to have one directory containing all
+;; index files, this is controlled by the `nnir-namazu-index-directory'
+;; variable. To function the `nnir-namazu-remove-prefix' variable must
+;; also be correct, see the documentation for `nnir-wais-remove-prefix'
+;; above.
+;;
+;; It is particularly important not to pass any any switches to namazu
+;; that will change the output format. Good switches to use include
+;; `--sort', `--ascending', `--early' and `--late'. Refer to the Namazu
+;; documentation for further information on valid switches.
+;;
+;; To index my mail with the `mknmz' program I use the following
+;; configuration file:
+;;
+;; ,----
+;; | package conf; # Don't remove this line!
+;; |
+;; | # Paths which will not be indexed. Don't use `^' or `$' anchors.
+;; | $EXCLUDE_PATH = "spam|sent";
+;; |
+;; | # Header fields which should be searchable. case-insensitive
+;; | $REMAIN_HEADER = "from|date|message-id|subject";
+;; |
+;; | # Searchable fields. case-insensitive
+;; | $SEARCH_FIELD = "from|date|message-id|subject";
+;; |
+;; | # The max length of a word.
+;; | $WORD_LENG_MAX = 128;
+;; |
+;; | # The max length of a field.
+;; | $MAX_FIELD_LENGTH = 256;
+;; `----
+;;
+;; My mail is stored in the directories ~/Mail/mail/, ~/Mail/lists/ and
+;; ~/Mail/archive/, so to index them I go to the directory set in
+;; `nnir-namazu-index-directory' and issue the following command.
+;;
+;; mknmz --mailnews ~/Mail/archive/ ~/Mail/mail/ ~/Mail/lists/
+;;
+;; For maximum searching efficiency I have a cron job set to run this
+;; command every four hours.
+
+;; Developer information:
+
+;; I have tried to make the code expandable. Basically, it is divided
+;; into two layers. The upper layer is somewhat like the `nnvirtual'
+;; or `nnkiboze' backends: given a specification of what articles to
+;; show from another backend, it creates a group containing exactly
+;; those articles. The lower layer issues a query to a search engine
+;; and produces such a specification of what articles to show from the
+;; other backend.
+
+;; The interface between the two layers consists of the single
+;; function `nnir-run-query', which just selects the appropriate
+;; function for the search engine one is using. The input to
+;; `nnir-run-query' is a string, representing the query as input by
+;; the user. The output of `nnir-run-query' is supposed to be a
+;; vector, each element of which should in turn be a three-element
+;; vector. The first element should be group name of the article, the
+;; second element should be the article number, and the third element
+;; should be the Retrieval Status Value (RSV) as returned from the
+;; search engine. An RSV is the score assigned to the document by the
+;; search engine. For Boolean search engines like Glimpse, the RSV is
+;; always 1000 (or 1 or 100, or whatever you like).
+
+;; The sorting order of the articles in the summary buffer created by
+;; nnir is based on the order of the articles in the above mentioned
+;; vector, so that's where you can do the sorting you'd like. Maybe
+;; it would be nice to have a way of displaying the search result
+;; sorted differently?
+
+;; So what do you need to do when you want to add another search
+;; engine? You write a function that executes the query. Temporary
+;; data from the search engine can be put in `nnir-tmp-buffer'. This
+;; function should return the list of articles as a vector, as
+;; described above. Then, you need to register this backend in
+;; `nnir-engines'. Then, users can choose the backend by setting
+;; `nnir-search-engine'.
+
+;; Todo, or future ideas:
+
+;; * Make it so that Glimpse can also be called without `-F'.
+;;
+;; * It should be possible to restrict search to certain groups.
+;;
+;; * There is currently no error checking.
+;;
+;; * The summary buffer display is currently really ugly, with all the
+;; added information in the subjects. How could I make this
+;; prettier?
+;;
+;; * A function which can be called from an nnir summary buffer which
+;; teleports you into the group the current article came from and
+;; shows you the whole thread this article is part of.
+;; Implementation suggestions?
+;; (1998-07-24: There is now a preliminary implementation, but
+;; it is much too slow and quite fragile.)
+;;
+;; * Support other mail backends. In particular, probably quite a few
+;; people use nnfolder. How would one go about searching nnfolders
+;; and producing the right data needed? The group name and the RSV
+;; are simple, but what about the article number?
+;;
+;; * Support compressed mail files. Probably, just stripping off the
+;; `.gz' or `.Z' file name extension is sufficient.
+;;
+;; * Support a find/grep combination.
+;;
+;; * At least for imap, the query is performed twice.
+;;
+;; * Support multiple mail backends. The information that is needed
+;; by nnir could be put in the server parameters. (Use sensible
+;; default values, though: include the name of the backend in the
+;; default value such that people do not have to mess with the
+;; server parameters if they don't want to.) It is not clear how to
+;; do the user interface, though. Hm. Maybe offer the user a
+;; completable list of backends to search? Or use the
+;; process-marked groups to find out which backends to search? Or
+;; always search all backends?
+;;
+
+;; Have you got other ideas?
+
+;;; Setup Code:
+
+(defconst nnir-version "$Id: nnir.el,v 1.72 2001/08/17 11:15:13 grossjoh Exp $"
+ "Version of NNIR.")
+
+(require 'cl)
+(require 'nnoo)
+(require 'gnus-group)
+(require 'gnus-sum)
+(eval-and-compile
+ (require 'gnus-util))
+
+(nnoo-declare nnir)
+(nnoo-define-basics nnir)
+
+(gnus-declare-backend "nnir" 'mail)
+
+;;; Developer Extension Variable:
+
+(defvar nnir-engines
+ '((glimpse nnir-run-glimpse
+ ((group . "Group spec: ")))
+ (wais nnir-run-waissearch
+ ())
+ (excite nnir-run-excite-search
+ ())
+ (imap nnir-run-imap
+ ())
+ (swish++ nnir-run-swish++
+ ((group . "Group spec: ")))
+ (swish-e nnir-run-swish-e
+ ((group . "Group spec: ")))
+ (namazu nnir-run-namazu
+ ()))
+"Alist of supported search engines.
+Each element in the alist is a three-element list (ENGINE FUNCTION ARGS).
+ENGINE is a symbol designating the searching engine. FUNCTION is also
+a symbol, giving the function that does the search. The third element
+ARGS is a list of cons pairs (PARAM . PROMPT). When issuing a query,
+the FUNCTION will issue a query for each of the PARAMs, using PROMPT.
+
+The value of `nnir-search-engine' must be one of the ENGINE symbols.
+For example, use the following line for searching using freeWAIS-sf:
+ (setq nnir-search-engine 'wais)
+Use the following line if you read your mail via IMAP and your IMAP
+server supports searching:
+ (setq nnir-search-engine 'imap)
+Note that you have to set additional variables for most backends. For
+example, the `wais' backend needs the variables `nnir-wais-program',
+`nnir-wais-database' and `nnir-wais-remove-prefix'.
+
+Add an entry here when adding a new search engine.")
+
+;;; User Customizable Variables:
+
+(defgroup nnir nil
+ "Search nnmh and nnml groups in Gnus with Glimpse, freeWAIS-sf, or EWS.")
+
+;; Mail backend.
+
+;; TODO:
+;; If `nil', use server parameters to find out which server to search. CCC
+;;
+(defcustom nnir-mail-backend '(nnml "")
+ "*Specifies which backend should be searched.
+More precisely, this is used to determine from which backend to fetch the
+messages found.
+
+This must be equal to an existing server, so maybe it is best to use
+something like the following:
+ (setq nnir-mail-backend (nth 0 gnus-secondary-select-methods))
+The above line works fine if the mail backend you want to search is
+the first element of gnus-secondary-select-methods (`nth' starts counting
+at zero)."
+ :type '(sexp)
+ :group 'nnir)
+
+;; Search engine to use.
+
+(defcustom nnir-search-engine 'wais
+ "*The search engine to use. Must be a symbol.
+See `nnir-engines' for a list of supported engines, and for example
+settings of `nnir-search-engine'."
+ :type '(sexp)
+ :group 'nnir)
+
+;; Glimpse engine.
+
+(defcustom nnir-glimpse-program "glimpse"
+ "*Name of Glimpse executable."
+ :type '(string)
+ :group 'nnir)
+
+(defcustom nnir-glimpse-home (getenv "HOME")
+ "*Value of `-H' glimpse option.
+`~' and environment variables must be expanded, see the functions
+`expand-file-name' and `substitute-in-file-name'."
+ :type '(directory)
+ :group 'nnir)
+
+(defcustom nnir-glimpse-remove-prefix (concat (getenv "HOME") "/Mail/")
+ "*The prefix to remove from each file name returned by Glimpse
+in order to get a group name (albeit with / instead of .). This is a
+regular expression.
+
+For example, suppose that Glimpse returns file names such as
+\"/home/john/Mail/mail/misc/42\". For this example, use the following
+setting: (setq nnir-glimpse-remove-prefix \"/home/john/Mail/\")
+Note the trailing slash. Removing this prefix gives \"mail/misc/42\".
+`nnir' knows to remove the \"/42\" and to replace \"/\" with \".\" to
+arrive at the correct group name, \"mail.misc\"."
+ :type '(regexp)
+ :group 'nnir)
+
+(defcustom nnir-glimpse-additional-switches '("-i")
+ "*A list of strings, to be given as additional arguments to glimpse.
+The switches `-H', `-W', `-l' and `-y' are always used -- calling
+glimpse without them does not make sense in our situation.
+Suggested elements to put here are `-i' and `-w'.
+
+Note that this should be a list. Ie, do NOT use the following:
+ (setq nnir-glimpse-additional-switches \"-i -w\") ; wrong!
+Instead, use this:
+ (setq nnir-glimpse-additional-switches '(\"-i\" \"-w\"))"
+ :type '(repeat (string))
+ :group 'nnir)
+
+;; freeWAIS-sf.
+
+(defcustom nnir-wais-program "waissearch"
+ "*Name of waissearch executable."
+ :type '(string)
+ :group 'nnir)
+
+(defcustom nnir-wais-database (expand-file-name "~/.wais/mail")
+ "*Name of Wais database containing the mail.
+
+Note that this should be a file name without extension. For example,
+if you have a file /home/john/.wais/mail.fmt, use this:
+ (setq nnir-wais-database \"/home/john/.wais/mail\")
+The string given here is passed to `waissearch -d' as-is."
+ :type '(file)
+ :group 'nnir)
+
+(defcustom nnir-wais-remove-prefix (concat (getenv "HOME") "/Mail/")
+ "*The prefix to remove from each directory name returned by waissearch
+in order to get a group name (albeit with / instead of .). This is a
+regular expression.
+
+This variable is similar to `nnir-glimpse-remove-prefix', only for Wais,
+not Glimpse."
+ :type '(regexp)
+ :group 'nnir)
+
+;; EWS (Excite for Web Servers) engine.
+
+(defcustom nnir-excite-aquery-program "aquery.pl"
+ "*Name of the EWS query program. Should be `aquery.pl' or a path to same."
+ :type '(string)
+ :group 'nnir)
+
+(defcustom nnir-excite-collection "Mail"
+ "*Name of the EWS collection to search."
+ :type '(string)
+ :group 'nnir)
+
+(defcustom nnir-excite-remove-prefix (concat (getenv "HOME") "/Mail/")
+ "*The prefix to remove from each file name returned by EWS
+in order to get a group name (albeit with / instead of .). This is a
+regular expression.
+
+This variable is very similar to `nnir-glimpse-remove-prefix', except
+that it is for EWS, not Glimpse."
+ :type '(regexp)
+ :group 'nnir)
+
+;; Swish++. Next three variables Copyright (C) 2000, 2001 Christoph
+;; Conrad <christoph.conrad@gmx.de>.
+;; Swish++ home page: http://homepage.mac.com/pauljlucas/software/swish/
+
+(defcustom nnir-swish++-configuration-file
+ (expand-file-name "~/Mail/swish++.conf")
+ "*Configuration file for swish++."
+ :type '(file)
+ :group 'nnir)
+
+(defcustom nnir-swish++-program "search"
+ "*Name of swish++ search executable."
+ :type '(string)
+ :group 'nnir)
+
+(defcustom nnir-swish++-additional-switches '()
+ "*A list of strings, to be given as additional arguments to swish++.
+
+Note that this should be a list. Ie, do NOT use the following:
+ (setq nnir-swish++-additional-switches \"-i -w\") ; wrong
+Instead, use this:
+ (setq nnir-swish++-additional-switches '(\"-i\" \"-w\"))"
+ :type '(repeat (string))
+ :group 'nnir)
+
+(defcustom nnir-swish++-remove-prefix (concat (getenv "HOME") "/Mail/")
+ "*The prefix to remove from each file name returned by swish++
+in order to get a group name (albeit with / instead of .). This is a
+regular expression.
+
+This variable is very similar to `nnir-glimpse-remove-prefix', except
+that it is for swish++, not Glimpse."
+ :type '(regexp)
+ :group 'nnir)
+
+;; Swish-E. Next three variables Copyright (C) 2000 Christoph Conrad
+;; <christoph.conrad@gmx.de>.
+;; URL: http://sunsite.berkeley.edu/SWISH-E/
+;; New version: http://www.boe.es/swish-e
+
+(defcustom nnir-swish-e-index-file
+ (expand-file-name "~/Mail/index.swish-e")
+ "*Index file for swish-e."
+ :type '(file)
+ :group 'nnir)
+
+(defcustom nnir-swish-e-program "swish-e"
+ "*Name of swish-e search executable."
+ :type '(string)
+ :group 'nnir)
+
+(defcustom nnir-swish-e-additional-switches '()
+ "*A list of strings, to be given as additional arguments to swish-e.
+
+Note that this should be a list. Ie, do NOT use the following:
+ (setq nnir-swish-e-additional-switches \"-i -w\") ; wrong
+Instead, use this:
+ (setq nnir-swish-e-additional-switches '(\"-i\" \"-w\"))"
+ :type '(repeat (string))
+ :group 'nnir)
+
+(defcustom nnir-swish-e-remove-prefix (concat (getenv "HOME") "/Mail/")
+ "*The prefix to remove from each file name returned by swish-e
+in order to get a group name (albeit with / instead of .). This is a
+regular expression.
+
+This variable is very similar to `nnir-glimpse-remove-prefix', except
+that it is for swish-e, not Glimpse."
+ :type '(regexp)
+ :group 'nnir)
+
+;; Namazu engine, see <URL:http://ww.namazu.org/>
+
+(defcustom nnir-namazu-program "namazu"
+ "*Name of Namazu search executable."
+ :type '(string)
+ :group 'nnir)
+
+(defcustom nnir-namazu-index-directory (expand-file-name "~/Mail/namazu/")
+ "*Index directory for Namazu."
+ :type '(directory)
+ :group 'nnir)
+
+(defcustom nnir-namazu-additional-switches '()
+ "*A list of strings, to be given as additional arguments to namazu.
+The switches `-q', `-a', and `-s' are always used, very few other switches
+make any sense in this context.
+
+Note that this should be a list. Ie, do NOT use the following:
+ (setq nnir-namazu-additional-switches \"-i -w\") ; wrong
+Instead, use this:
+ (setq nnir-namazu-additional-switches '(\"-i\" \"-w\"))"
+ :type '(repeat (string))
+ :group 'nnir)
+
+(defcustom nnir-namazu-remove-prefix (concat (getenv "HOME") "/Mail/")
+ "*The prefix to remove from each file name returned by Namazu
+in order to get a group name (albeit with / instead of .).
+
+This variable is very similar to `nnir-glimpse-remove-prefix', except
+that it is for Namazu, not Glimpse."
+ :type '(directory)
+ :group 'nnir)
+
+;;; Internal Variables:
+
+(defvar nnir-current-query nil
+ "Internal: stores current query (= group name).")
+
+(defvar nnir-current-server nil
+ "Internal: stores current server (does it ever change?).")
+
+(defvar nnir-current-group-marked nil
+ "Internal: stores current list of process-marked groups.")
+
+(defvar nnir-artlist nil
+ "Internal: stores search result.")
+
+(defvar nnir-tmp-buffer " *nnir*"
+ "Internal: temporary buffer.")
+
+;;; Code:
+
+;; Gnus glue.
+
+(defun gnus-group-make-nnir-group (extra-parms query)
+ "Create an nnir group. Asks for query."
+ (interactive "P\nsQuery: ")
+ (let ((parms nil))
+ (if extra-parms
+ (setq parms (nnir-read-parms query))
+ (setq parms (list (cons 'query query))))
+ (gnus-group-read-ephemeral-group
+ (concat "nnir:" (prin1-to-string parms)) '(nnir "") t
+ (cons (current-buffer)
+ gnus-current-window-configuration)
+ nil)))
+
+;; Emacs 19 compatibility?
+(or (fboundp 'kbd) (defalias 'kbd 'read-kbd-macro))
+
+(defun nnir-group-mode-hook ()
+ (define-key gnus-group-mode-map
+ (if (fboundp 'read-kbd-macro)
+ (kbd "G G")
+ "GG") ; XEmacs 19 compat
+ 'gnus-group-make-nnir-group))
+(add-hook 'gnus-group-mode-hook 'nnir-group-mode-hook)
+
+
+
+;; Summary mode commands.
+
+(defun gnus-summary-nnir-goto-thread ()
+ "Only applies to nnir groups. Go to group this article came from
+and show thread that contains this article."
+ (interactive)
+ (unless (eq 'nnir (car (gnus-find-method-for-group gnus-newsgroup-name)))
+ (error "Can't execute this command unless in nnir group."))
+ (let* ((cur (gnus-summary-article-number))
+ (backend-group (nnir-artlist-artitem-group nnir-artlist cur))
+ (backend-number (nnir-artlist-artitem-number nnir-artlist cur)))
+ (gnus-group-read-ephemeral-group
+ backend-group
+ nnir-mail-backend
+ t ; activate
+ (cons (current-buffer)
+ 'summary) ; window config
+ nil
+ (list backend-number))
+ (gnus-summary-limit (list backend-number))
+ (gnus-summary-refer-thread)))
+
+(if (fboundp 'eval-after-load)
+ (eval-after-load "gnus-sum"
+ '(define-key gnus-summary-goto-map
+ "T" 'gnus-summary-nnir-goto-thread))
+ (add-hook 'gnus-summary-mode-hook
+ (function (lambda ()
+ (define-key gnus-summary-goto-map
+ "T" 'gnus-summary-nnir-goto-thread)))))
+
+
+
+;; Gnus backend interface functions.
+
+(deffoo nnir-open-server (server &optional definitions)
+ ;; Just set the server variables appropriately.
+ (nnoo-change-server 'nnir server definitions))
+
+(deffoo nnir-request-group (group &optional server fast)
+ "GROUP is the query string."
+ (nnir-possibly-change-server server)
+ ;; Check for cache and return that if appropriate.
+ (if (and (equal group nnir-current-query)
+ (equal gnus-group-marked nnir-current-group-marked)
+ (or (null server)
+ (equal server nnir-current-server)))
+ nnir-artlist
+ ;; Cache miss.
+ (setq nnir-artlist (nnir-run-query group))
+ (save-excursion
+ (set-buffer nntp-server-buffer)
+ (if (zerop (length nnir-artlist))
+ (progn
+ (setq nnir-current-query nil
+ nnir-current-server nil
+ nnir-current-group-marked nil
+ nnir-artlist nil)
+ (nnheader-report 'nnir "Search produced empty results."))
+ ;; Remember data for cache.
+ (setq nnir-current-query group)
+ (when server (setq nnir-current-server server))
+ (setq nnir-current-group-marked gnus-group-marked)
+ (nnheader-insert "211 %d %d %d %s\n"
+ (nnir-artlist-length nnir-artlist) ; total #
+ 1 ; first #
+ (nnir-artlist-length nnir-artlist) ; last #
+ group))))) ; group name
+
+(deffoo nnir-retrieve-headers (articles &optional group server fetch-old)
+ (save-excursion
+ (let ((artlist (copy-sequence articles))
+ (idx 1)
+ (art nil)
+ (artitem nil)
+ (artgroup nil) (artno nil)
+ (artrsv nil)
+ (artfullgroup nil)
+ (novitem nil)
+ (novdata nil)
+ (foo nil))
+ (while (not (null artlist))
+ (setq art (car artlist))
+ (or (numberp art)
+ (nnheader-report
+ 'nnir
+ "nnir-retrieve-headers doesn't grok message ids: %s"
+ art))
+ (setq artitem (nnir-artlist-article nnir-artlist art))
+ (setq artrsv (nnir-artitem-rsv artitem))
+ (setq artgroup (nnir-artitem-group artitem))
+ (setq artno (nnir-artitem-number artitem))
+ (setq artfullgroup (nnir-group-full-name artgroup))
+ ;; retrieve NOV or HEAD data for this article, transform into
+ ;; NOV data and prepend to `novdata'
+ (set-buffer nntp-server-buffer)
+ (case (setq foo (gnus-retrieve-headers (list artno) artfullgroup nil))
+ (nov
+ (goto-char (point-min))
+ (setq novitem (nnheader-parse-nov))
+ (unless novitem
+ (pop-to-buffer nntp-server-buffer)
+ (error
+ "nnheader-parse-nov returned nil for article %s in group %s"
+ artno artfullgroup)))
+ (headers
+ (goto-char (point-min))
+ (setq novitem (nnheader-parse-head))
+ (unless novitem
+ (pop-to-buffer nntp-server-buffer)
+ (error
+ "nnheader-parse-head returned nil for article %s in group %s"
+ artno artfullgroup)))
+ (t (nnheader-report 'nnir "Don't support header type %s." foo)))
+ ;; replace article number in original group with article number
+ ;; in nnir group
+ (mail-header-set-number novitem idx)
+ (mail-header-set-from novitem
+ (mail-header-from novitem))
+ (mail-header-set-subject
+ novitem
+ (format "[%d: %s/%d] %s"
+ artrsv artgroup artno
+ (mail-header-subject novitem)))
+ ;;-(mail-header-set-extra novitem nil)
+ (push novitem novdata)
+ (setq artlist (cdr artlist))
+ (setq idx (1+ idx)))
+ (setq novdata (nreverse novdata))
+ (set-buffer nntp-server-buffer) (erase-buffer)
+ (mapcar 'nnheader-insert-nov novdata)
+ 'nov)))
+
+(deffoo nnir-request-article (article
+ &optional group server to-buffer)
+ (save-excursion
+ (let* ((artitem (nnir-artlist-article nnir-artlist
+ article))
+ (artgroup (nnir-artitem-group artitem))
+ (artno (nnir-artitem-number artitem))
+ ;; Bug?
+ ;; Why must we bind nntp-server-buffer here? It won't
+ ;; work if `buf' is used, say. (Of course, the set-buffer
+ ;; line below must then be updated, too.)
+ (nntp-server-buffer (or to-buffer nntp-server-buffer)))
+ (set-buffer nntp-server-buffer)
+ (erase-buffer)
+ (message "Requesting article %d from group %s"
+ artno
+ (nnir-group-full-name artgroup))
+ (gnus-request-article artno (nnir-group-full-name artgroup)
+ nntp-server-buffer)
+ (cons artgroup artno))))
+
+
+(nnoo-define-skeleton nnir)
+
+;;; Search Engine Interfaces:
+
+;; Glimpse interface.
+(defun nnir-run-glimpse (query &optional group)
+ "Run given query against glimpse. Returns a vector of (group name, file name)
+pairs (also vectors, actually)."
+ (save-excursion
+ (let ((artlist nil)
+ (groupspec (cdr (assq 'group query)))
+ (qstring (cdr (assq 'query query))))
+ (when (and group groupspec)
+ (error (concat "It does not make sense to use a group spec"
+ " with process-marked groups.")))
+ (when group
+ (setq groupspec (gnus-group-real-name group)))
+ (set-buffer (get-buffer-create nnir-tmp-buffer))
+ (erase-buffer)
+ (if groupspec
+ (message "Doing glimpse query %s on %s..." query groupspec)
+ (message "Doing glimpse query %s..." query))
+ (let* ((cp-list
+ `( ,nnir-glimpse-program
+ nil ; input from /dev/null
+ t ; output
+ nil ; don't redisplay
+ "-H" ,nnir-glimpse-home ; search home dir
+ "-W" ; match pattern in file
+ "-l" "-y" ; misc options
+ ,@nnir-glimpse-additional-switches
+ "-F" ,nnir-glimpse-remove-prefix ; restrict output to mail
+ ,qstring ; the query, in glimpse format
+ ))
+ (exitstatus
+ (progn
+ (message "%s args: %s" nnir-glimpse-program
+ (mapconcat 'identity (cddddr cp-list) " "))
+ (apply 'call-process cp-list))))
+ (unless (or (null exitstatus)
+ (zerop exitstatus))
+ (nnheader-report 'nnir "Couldn't run glimpse: %s" exitstatus)
+ ;; Glimpse failure reason is in this buffer, show it if
+ ;; the user wants it.
+ (when (> gnus-verbose 6)
+ (display-buffer nnir-tmp-buffer))))
+ (when groupspec
+ (keep-lines groupspec))
+ (if groupspec
+ (message "Doing glimpse query %s on %s...done" query groupspec)
+ (message "Doing glimpse query %s...done" query))
+ (sit-for 0)
+ ;; CCC: The following work of extracting group name and article
+ ;; number from the Glimpse output can probably better be done by
+ ;; just going through the buffer once, and plucking out the
+ ;; right information from each line.
+ ;; remove superfluous stuff from glimpse output
+ (goto-char (point-min))
+ (delete-non-matching-lines "/[0-9]+$")
+ ;;(delete-matching-lines "\\.overview~?$")
+ (goto-char (point-min))
+ (while (re-search-forward (concat "^" nnir-glimpse-remove-prefix) nil t)
+ (replace-match ""))
+ ;; separate group name from article number with \t
+ ;; XEmacs compatible version
+ (goto-char (point-max))
+ (while (re-search-backward "/[0-9]+$" nil t)
+ (delete-char 1 nil)
+ (insert-char ?\t 1))
+; Emacs compatible version
+; (goto-char (point-min))
+; (while (re-search-forward "\\(/\\)[0-9]+$" nil t)
+; (replace-match "\t" t t nil 1))
+ ;; replace / with . in group names
+ (subst-char-in-region (point-min) (point-max) ?/ ?. t)
+ ;; massage buffer to contain some Lisp;
+ ;; this depends on the artlist encoding internals
+ ;; maybe this dependency should be removed?
+ (goto-char (point-min))
+ (while (not (eobp))
+ (insert "[\"")
+ (skip-chars-forward "^\t")
+ (insert "\" ")
+ (end-of-line)
+ (insert " 1000 ]") ; 1000 = score
+ (forward-line 1))
+ (insert "])\n")
+ (goto-char (point-min))
+ (insert "(setq artlist [\n")
+ (eval-buffer)
+ (sort* artlist
+ (function (lambda (x y)
+ (if (string-lessp (nnir-artitem-group x)
+ (nnir-artitem-group y))
+ t
+ (< (nnir-artitem-number x)
+ (nnir-artitem-number y))))))
+ )))
+
+;; freeWAIS-sf interface.
+(defun nnir-run-waissearch (query &optional group)
+ "Run given query agains waissearch. Returns vector of (group name, file name)
+pairs (also vectors, actually)."
+ (when group
+ (error "The freeWAIS-sf backend cannot search specific groups."))
+ (save-excursion
+ (let ((qstring (cdr (assq 'query query)))
+ (artlist nil)
+ (score nil) (artno nil) (dirnam nil) (group nil))
+ (set-buffer (get-buffer-create nnir-tmp-buffer))
+ (erase-buffer)
+ (message "Doing WAIS query %s..." query)
+ (call-process nnir-wais-program
+ nil ; input from /dev/null
+ t ; output to current buffer
+ nil ; don't redisplay
+ "-d" nnir-wais-database ; database to search
+ qstring)
+ (message "Massaging waissearch output...")
+ ;; remove superfluous lines
+ (keep-lines "Score:")
+ ;; extract data from result lines
+ (goto-char (point-min))
+ (while (re-search-forward
+ "Score: +\\([0-9]+\\).*'\\([0-9]+\\) +\\([^']+\\)/'" nil t)
+ (setq score (match-string 1)
+ artno (match-string 2)
+ dirnam (match-string 3))
+ (unless (string-match nnir-wais-remove-prefix dirnam)
+ (nnheader-report 'nnir "Dir name %s doesn't contain prefix %s"
+ dirnam nnir-wais-remove-prefix))
+ (setq group (substitute ?. ?/ (replace-match "" t t dirnam)))
+ (push (vector group
+ (string-to-int artno)
+ (string-to-int score))
+ artlist))
+ (message "Massaging waissearch output...done")
+ (apply 'vector
+ (sort* artlist
+ (function (lambda (x y)
+ (> (nnir-artitem-rsv x)
+ (nnir-artitem-rsv y)))))))))
+
+;; EWS (Excite for Web Servers) interface
+(defun nnir-run-excite-search (query &optional group)
+ "Run a given query against EWS. Returns vector of (group name, file name)
+pairs (also vectors, actually)."
+ (when group
+ (error "Searching specific groups not implemented for EWS."))
+ (save-excursion
+ (let ((qstring (cdr (assq 'query query)))
+ artlist group article-num article)
+ (setq nnir-current-query query)
+ (set-buffer (get-buffer-create nnir-tmp-buffer))
+ (erase-buffer)
+ (message "Doing EWS query %s..." qstring)
+ (call-process nnir-excite-aquery-program
+ nil ; input from /dev/null
+ t ; output to current buffer
+ nil ; don't redisplay
+ nnir-excite-collection
+ (if (string= (substring qstring 0 1) "(")
+ qstring
+ (format "(concept %s)" qstring)))
+ (message "Gathering query output...")
+
+ (goto-char (point-min))
+ (while (re-search-forward
+ "^[0-9]+\\s-[0-9]+\\s-[0-9]+\\s-\\(\\S-*\\)" nil t)
+ (setq article (match-string 1))
+ (unless (string-match
+ (concat "^" (regexp-quote nnir-excite-remove-prefix)
+ "\\(.*\\)/\\([0-9]+\\)") article)
+ (nnheader-report 'nnir "Dir name %s doesn't contain prefix %s"
+ article nnir-excite-remove-prefix))
+ (setq group (substitute ?. ?/ (match-string 1 article)))
+ (setq article-num (match-string 2 article))
+ (setq artlist (vconcat artlist (vector (vector group
+ (string-to-int article-num)
+ 1000)))))
+ (message "Gathering query output...done")
+ artlist)))
+
+;; IMAP interface. The following function is Copyright (C) 1998 Simon
+;; Josefsson <jas@pdc.kth.se>.
+;; todo:
+;; nnir invokes this two (2) times???!
+;; we should not use nnimap at all but open our own server connection
+;; we should not LIST * but use nnimap-list-pattern from defs
+;; send queries as literals
+;; handle errors
+
+(defun nnir-run-imap (query &optional group)
+ (require 'imap)
+ (require 'nnimap)
+ (unless group
+ (error "Must specify groups for IMAP searching."))
+ (save-excursion
+ (let ((qstring (cdr (assq 'query query)))
+ (server (cadr nnir-mail-backend))
+ (defs (caddr nnir-mail-backend))
+ artlist buf)
+ (message "Opening server %s" server)
+ (condition-case ()
+ (when (nnimap-open-server server defs) ;; xxx
+ (setq buf nnimap-server-buffer) ;; xxx
+ (message "Searching %s..." group)
+ (let ((arts 0)
+ (mbx (gnus-group-real-name group)))
+ (when (imap-mailbox-select mbx nil buf)
+ (mapcar
+ (lambda (artnum)
+ (push (vector mbx artnum 1) artlist)
+ (setq arts (1+ arts)))
+ (imap-search (concat "TEXT \"" qstring "\"") buf))
+ (message "Searching %s... %d matches" mbx arts)))
+ (message "Searching %s...done" group))
+ (quit nil))
+ (reverse artlist))))
+
+;; Swish++ interface. The following function is Copyright (C) 2000,
+;; 2001 Christoph Conrad <christoph.conrad@gmx.de>.
+;; -cc- Todo
+;; Search by
+;; - group
+;; Sort by
+;; - rank (default)
+;; - article number
+;; - file size
+;; - group
+(defun nnir-run-swish++ (query &optional group)
+ "Run given query against swish++.
+Returns a vector of (group name, file name) pairs (also vectors,
+actually).
+
+Tested with swish++ 4.7 on GNU/Linux and with with swish++ 5.0b2 on
+Windows NT 4.0."
+
+ (when group
+ (error "The swish++ backend cannot search specific groups."))
+
+ (save-excursion
+ (let ( (qstring (cdr (assq 'query query)))
+ (groupspec (cdr (assq 'group query)))
+ (artlist nil)
+ (score nil) (artno nil) (dirnam nil) (group nil) )
+
+ (when (equal "" qstring)
+ (error "swish++: You didn't enter anything."))
+
+ (set-buffer (get-buffer-create nnir-tmp-buffer))
+ (erase-buffer)
+
+ (if groupspec
+ (message "Doing swish++ query %s on %s..." qstring groupspec)
+ (message "Doing swish++ query %s..." qstring))
+
+ (let* ((cp-list `( ,nnir-swish++-program
+ nil ; input from /dev/null
+ t ; output
+ nil ; don't redisplay
+ "--config-file" ,nnir-swish++-configuration-file
+ ,@nnir-swish++-additional-switches
+ ,qstring ; the query, in swish++ format
+ ))
+ (exitstatus
+ (progn
+ (message "%s args: %s" nnir-swish++-program
+ (mapconcat 'identity (cddddr cp-list) " "));; ???
+ (apply 'call-process cp-list))))
+ (unless (or (null exitstatus)
+ (zerop exitstatus))
+ (nnheader-report 'nnir "Couldn't run swish++: %s" exitstatus)
+ ;; swish++ failure reason is in this buffer, show it if
+ ;; the user wants it.
+ (when (> gnus-verbose 6)
+ (display-buffer nnir-tmp-buffer))))
+
+ ;; The results are output in the format of:
+ ;; V 4.7 Linux
+ ;; rank relative-path-name file-size file-title
+ ;; V 5.0b2:
+ ;; rank relative-path-name file-size topic??
+ ;; where rank is an integer from 1 to 100.
+ (goto-char (point-min))
+ (while (re-search-forward
+ "\\(^[0-9]+\\) \\([^ ]+\\) [0-9]+ \\(.*\\)$" nil t)
+ (setq score (match-string 1)
+ artno (file-name-nondirectory (match-string 2))
+ dirnam (file-name-directory (match-string 2)))
+
+ ;; don't match directories
+ (when (string-match "^[0-9]+$" artno)
+ (when (not (null dirnam))
+
+ ; maybe limit results to matching groups.
+ (when (or (not groupspec)
+ (string-match groupspec dirnam))
+
+ ;; remove nnir-swish++-remove-prefix from beginning of dirname
+ (when (string-match (concat "^" nnir-swish++-remove-prefix)
+ dirnam)
+ (setq dirnam (replace-match "" t t dirnam)))
+
+ (setq dirnam (substring dirnam 0 -1))
+ ;; eliminate all ".", "/", "\" from beginning. Always matches.
+ (string-match "^[./\\]*\\(.*\\)$" dirnam)
+ ;; "/" -> "."
+ (setq group (substitute ?. ?/ (match-string 1 dirnam)))
+ ;; "\\" -> "."
+ (setq group (substitute ?. ?\\ group))
+
+ (push (vector group
+ (string-to-int artno)
+ (string-to-int score))
+ artlist)))))
+
+ (message "Massaging swish++ output...done")
+
+ ;; Sort by score
+ (apply 'vector
+ (sort* artlist
+ (function (lambda (x y)
+ (> (nnir-artitem-rsv x)
+ (nnir-artitem-rsv y)))))))))
+
+;; Swish-E interface. The following function is Copyright (C) 2000,
+;; 2001 by Christoph Conrad <christoph.conrad@gmx.de>.
+(defun nnir-run-swish-e (query &optional group)
+ "Run given query against swish-e.
+Returns a vector of (group name, file name) pairs (also vectors,
+actually).
+
+Tested with swish-e-2.0.1 on Windows NT 4.0."
+
+ ;; swish-e crashes with empty parameter to "-w" on commandline...
+ (when group
+ (error "The swish-e backend cannot search specific groups."))
+
+ (save-excursion
+ (let ( (qstring (cdr (assq 'query query)))
+ (artlist nil)
+ (score nil) (artno nil) (dirnam nil) (group nil) )
+
+ (when (equal "" qstring)
+ (error "swish-e: You didn't enter anything."))
+
+ (set-buffer (get-buffer-create nnir-tmp-buffer))
+ (erase-buffer)
+
+ (message "Doing swish-e query %s..." query)
+ (let* ((cp-list `( ,nnir-swish-e-program
+ nil ; input from /dev/null
+ t ; output
+ nil ; don't redisplay
+ "-f" ,nnir-swish-e-index-file
+ ,@nnir-swish-e-additional-switches
+ "-w"
+ ,qstring ; the query, in swish-e format
+ ))
+ (exitstatus
+ (progn
+ (message "%s args: %s" nnir-swish-e-program
+ (mapconcat 'identity (cddddr cp-list) " "))
+ (apply 'call-process cp-list))))
+ (unless (or (null exitstatus)
+ (zerop exitstatus))
+ (nnheader-report 'nnir "Couldn't run swish-e: %s" exitstatus)
+ ;; swish-e failure reason is in this buffer, show it if
+ ;; the user wants it.
+ (when (> gnus-verbose 6)
+ (display-buffer nnir-tmp-buffer))))
+
+ ;; The results are output in the format of:
+ ;; rank path-name file-title file-size
+ (goto-char (point-min))
+ (while (re-search-forward
+ "\\(^[0-9]+\\) \\([^ ]+\\) \"\\([^\"]+\\)\" [0-9]+$" nil t)
+ (setq score (match-string 1)
+ artno (match-string 3)
+ dirnam (file-name-directory (match-string 2)))
+
+ ;; don't match directories
+ (when (string-match "^[0-9]+$" artno)
+ (when (not (null dirnam))
+
+ ;; remove nnir-swish-e-remove-prefix from beginning of dirname
+ (when (string-match (concat "^" nnir-swish-e-remove-prefix)
+ dirnam)
+ (setq dirnam (replace-match "" t t dirnam)))
+
+ (setq dirnam (substring dirnam 0 -1))
+ ;; eliminate all ".", "/", "\" from beginning. Always matches.
+ (string-match "^[./\\]*\\(.*\\)$" dirnam)
+ ;; "/" -> "."
+ (setq group (substitute ?. ?/ (match-string 1 dirnam)))
+ ;; Windows "\\" -> "."
+ (setq group (substitute ?. ?\\ group))
+
+ (push (vector group
+ (string-to-int artno)
+ (string-to-int score))
+ artlist))))
+
+ (message "Massaging swish-e output...done")
+
+ ;; Sort by score
+ (apply 'vector
+ (sort* artlist
+ (function (lambda (x y)
+ (> (nnir-artitem-rsv x)
+ (nnir-artitem-rsv y)))))))))
+
+;; Namazu interface
+(defun nnir-run-namazu (query &optional group)
+ "Run given query against Namazu. Returns a vector of (group name, file name)
+pairs (also vectors, actually).
+
+Tested with Namazu 2.0.6 on a GNU/Linux system."
+ (when group
+ (error "The Namazu backend cannot search specific groups"))
+ (save-excursion
+ (let (
+ (artlist nil)
+ (qstring (cdr (assq 'query query)))
+ (score nil)
+ (group nil)
+ (article nil)
+ )
+ (set-buffer (get-buffer-create nnir-tmp-buffer))
+ (erase-buffer)
+ (let* ((cp-list
+ `( ,nnir-namazu-program
+ nil ; input from /dev/null
+ t ; output
+ nil ; don't redisplay
+ "-q" ; don't be verbose
+ "-a" ; show all matches
+ "-s" ; use short format
+ ,@nnir-namazu-additional-switches
+ ,qstring ; the query, in namazu format
+ ,nnir-namazu-index-directory ; index directory
+ ))
+ (exitstatus
+ (progn
+ (message "%s args: %s" nnir-namazu-program
+ (mapconcat 'identity (cddddr cp-list) " "))
+ (apply 'call-process cp-list))))
+ (unless (or (null exitstatus)
+ (zerop exitstatus))
+ (nnheader-report 'nnir "Couldn't run namazu: %s" exitstatus)
+ ;; Namazu failure reason is in this buffer, show it if
+ ;; the user wants it.
+ (when (> gnus-verbose 6)
+ (display-buffer nnir-tmp-buffer))))
+
+ ;; Namazu output looks something like this:
+ ;; 2. Re: Gnus agent expire broken (score: 55)
+ ;; /home/henrik/Mail/mail/sent/1310 (4,138 bytes)
+
+ (goto-char (point-min))
+ (while (re-search-forward
+ "^\\([0-9]+\\.\\).*\\((score: \\([0-9]+\\)\\))\n\\([^ ]+\\)"
+ nil t)
+ (setq score (match-string 3)
+ group (file-name-directory (match-string 4))
+ article (file-name-nondirectory (match-string 4)))
+
+ ;; make sure article and group is sane
+ (when (and (string-match "^[0-9]+$" article)
+ (not (null group)))
+ (when (string-match (concat "^" nnir-namazu-remove-prefix) group)
+ (setq group (replace-match "" t t group)))
+
+ ;; remove trailing slash from groupname
+ (setq group (substring group 0 -1))
+
+ ;; stuff results into artlist vector
+ (push (vector (substitute ?. ?/ group)
+ (string-to-int article)
+ (string-to-int score)) artlist)))
+
+ ;; sort artlist by score
+ (apply 'vector
+ (sort* artlist
+ (function (lambda (x y)
+ (> (nnir-artitem-rsv x)
+ (nnir-artitem-rsv y)))))))))
+
+;;; Util Code:
+
+(defun nnir-read-parms (query)
+ "Reads additional search parameters according to `nnir-engines'."
+ (let ((parmspec (caddr (assoc nnir-search-engine nnir-engines))))
+ (cons (cons 'query query)
+ (mapcar 'nnir-read-parm parmspec))))
+
+(defun nnir-read-parm (parmspec)
+ "Reads a single search parameter.
+`parmspec' is a cons cell, the car is a symbol, the cdr is a prompt."
+ (let ((sym (car parmspec))
+ (prompt (cdr parmspec)))
+ (cons sym (read-string prompt))))
+
+(defun nnir-run-query (query)
+ "Invoke appropriate search engine function (see `nnir-engines').
+If some groups were process-marked, run the query for each of the groups
+and concat the results."
+ (let ((search-func (cadr (assoc nnir-search-engine nnir-engines)))
+ (q (car (read-from-string query))))
+ (if gnus-group-marked
+ (apply 'append
+ (mapcar (lambda (x)
+ (funcall search-func q x))
+ gnus-group-marked))
+ (funcall search-func q nil))))
+
+(defun nnir-group-full-name (shortname)
+ "For the given group name, return a full Gnus group name.
+The Gnus backend/server information is added."
+ (gnus-group-prefixed-name shortname nnir-mail-backend))
+
+(defun nnir-possibly-change-server (server)
+ (unless (and server (nnir-server-opened server))
+ (nnir-open-server server)))
+
+
+;; Data type article list.
+
+(defun nnir-artlist-length (artlist)
+ "Returns number of articles in artlist."
+ (length artlist))
+
+(defun nnir-artlist-article (artlist n)
+ "Returns from ARTLIST the Nth artitem (counting starting at 1)."
+ (elt artlist (1- n)))
+
+(defun nnir-artitem-group (artitem)
+ "Returns the group from the ARTITEM."
+ (elt artitem 0))
+
+(defun nnir-artlist-artitem-group (artlist n)
+ "Returns from ARTLIST the group of the Nth artitem (counting from 1)."
+ (nnir-artitem-group (nnir-artlist-article artlist n)))
+
+(defun nnir-artitem-number (artitem)
+ "Returns the number from the ARTITEM."
+ (elt artitem 1))
+
+(defun nnir-artlist-artitem-number (artlist n)
+ "Returns from ARTLIST the number of the Nth artitem (counting from 1)."
+ (nnir-artitem-number (nnir-artlist-article artlist n)))
+
+(defun nnir-artitem-rsv (artitem)
+ "Returns the Retrieval Status Value (RSV, score) from the ARTITEM."
+ (elt artitem 2))
+
+(defun nnir-artlist-artitem-rsv (artlist n)
+ "Returns from ARTLIST the Retrieval Status Value of the Nth artitem
+(counting from 1)."
+ (nnir-artitem-rsv (nnir-artlist-article artlist n)))
+
+;; unused?
+(defun nnir-artlist-groups (artlist)
+ "Returns a list of all groups in the given ARTLIST."
+ (let ((res nil)
+ (with-dups nil))
+ ;; from each artitem, extract group component
+ (setq with-dups (mapcar 'nnir-artitem-group artlist))
+ ;; remove duplicates from above
+ (mapcar (function (lambda (x) (add-to-list 'res x)))
+ with-dups)
+ res))
+
+
+;; The end.
+(provide 'nnir)
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