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;;;;; -*-coding: iso-8859-1;-*-
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;;;;;
;;;;; $Id$
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;;;;; Copyright (C) 1991-2002  Lysator Academic Computer Association.
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;;;;;
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;;;;; This file is part of the LysKOM Emacs LISP client.
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;;;;; 
;;;;; LysKOM is free software; you can redistribute it and/or modify it
;;;;; under the terms of the GNU General Public License as published by 
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;;;;; the Free Software Foundation; either version 2, or (at your option) 
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;;;;; any later version.
;;;;; 
;;;;; LysKOM 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 LysKOM; see the file COPYING.  If not, write to
;;;;; Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
;;;;; or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, 
;;;;; MA 02139, USA.
;;;;;
;;;;; Please mail bug reports to bug-lyskom@lysator.liu.se. 
;;;;;
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;;;; ================================================================
;;;; ================================================================
;;;;
;;;; File: commands1.el
;;;;
;;;; This file contains the code for some of the high level commands.
;;;;

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(setq lyskom-clientversion-long 
      (concat lyskom-clientversion-long
	      "$Id$\n"))

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(eval-when-compile
  (require 'lyskom-command "command"))

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;;; ================================================================
;;;                  F} uppmuntran - Get appreciation 

;;; Author: Inge Wallin


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(def-kom-command kom-get-appreciation ()
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  "Give the user a little light in the dark"
  (interactive)
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  (lyskom-insert-string 'appreciation))
  
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;;; ================================================================
;;;                      F} Sk{ll - Get abuse

;;; Author: Inge Wallin


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(def-kom-command kom-get-abuse ()
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  "Give the user a little verbal abuse."
  (interactive)
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  (lyskom-insert-string 'abuse))
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;;; ================================================================
;;;            Utpl}na - Delete a person or a conference

;;; Author: Inge Wallin


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(def-kom-command kom-delete-conf ()
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  "Delete a person or a conference."
  (interactive)
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  (let ((conf-stat 
	 (lyskom-read-conf-stat (lyskom-get-string 'what-conf-to-delete)
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				'(all) nil nil t)))
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    (if conf-stat
	(if (lyskom-ja-or-nej-p
	     (lyskom-format 'confirm-delete-pers-or-conf
			    (if (conf-type->letterbox (conf-stat->conf-type 
						       conf-stat))
				(lyskom-get-string 'the-pers)
			      (lyskom-get-string 'the-conf))
			    (conf-stat->name conf-stat)))
	    (if (blocking-do 'delete-conf
			     (conf-stat->conf-no conf-stat))
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		(progn
		  (lyskom-format-insert 'conf-is-deleted
					(conf-stat->name conf-stat))
		  (when (= (conf-stat->conf-no conf-stat)
			   lyskom-pers-no)
		    (lyskom-insert (lyskom-get-string
				    'you-have-deleted-yourself))
		    (setq lyskom-pers-no nil
			  lyskom-membership nil
			  lyskom-to-do-list (lyskom-create-read-list)
			  lyskom-reading-list (lyskom-create-read-list)
			  lyskom-pending-commands (cons
						   'kom-start-anew
						   lyskom-pending-commands))))
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	      (lyskom-format-insert 'you-could-not-delete
				    conf-stat))
	  (lyskom-insert-string 'deletion-not-confirmed))
      (lyskom-insert-string 'somebody-else-deleted-that-conf))))
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;;; ================================================================
;;;                Radera (text) - Delete a text

;;; Author: Inge Wallin


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(def-kom-command kom-delete-text (text-no)
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  "Delete a text. Argument: TEXT-NO"
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  (interactive (list (lyskom-read-text-no-prefix-arg 'what-text-to-delete)))
  (if text-no
      (let* ((do-delete t)
             (text-stat (blocking-do 'get-text-stat text-no))
             (num-marks (text-stat->no-of-marks text-stat))
             (is-marked-by-me (cache-text-is-marked text-no)))
        (cond ((null text-stat) 
               (lyskom-report-command-answer nil)
               (setq do-delete nil))

              ((> (text-stat->no-of-marks text-stat) 0)
               (setq do-delete
                     (lyskom-j-or-n-p 
                      (lyskom-format 'delete-marked-text
                                     (if (> num-marks 0)
                                         (if is-marked-by-me
                                             (if (= num-marks 1)
                                                 (lyskom-get-string 'delete-marked-by-you)
                                               (lyskom-format 'delete-marked-by-you-and-others
                                                              (1- num-marks)))
                                           (lyskom-format 'delete-marked-by-several
                                                          num-marks))))))))
        (when do-delete
          (lyskom-format-insert 'deleting-text text-no)
          (when (lyskom-report-command-answer 
                 (blocking-do 'delete-text text-no))
            (when is-marked-by-me
              (lyskom-unmark-text text-no)))))
    (lyskom-insert 'confusion-what-to-delete)))
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;;; ================================================================
;;;        ]terse presentation - Review the presentation
;;;               for a person or a conference

;;; Author: Inge Wallin


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(def-kom-command kom-review-presentation (&optional text-no)
  "Review the presentation for a person or a conference. If a prefix argument
is given, the presentation of the author of that text will be shown."
  (interactive (and current-prefix-arg ; only peek at textno:s when prefixed!
		    (list (lyskom-read-text-no-prefix-arg
			   'text-to-see-author-of))))
  (let ((conf-stat
         (if text-no
             (blocking-do 'get-conf-stat
	      (text-stat->author (blocking-do 'get-text-stat text-no)))
           (lyskom-read-conf-stat
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            (lyskom-get-string 'presentation-for-whom)
            '(all)
            nil "" t))))
    (if (null conf-stat)
        (lyskom-insert-string 'somebody-deleted-that-conf)
      (lyskom-format-insert 'review-presentation-of
                            conf-stat)
      (if (/= (conf-stat->presentation conf-stat) 0)
          (lyskom-view-text (conf-stat->presentation conf-stat))
        (lyskom-format-insert 'has-no-presentation
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                              conf-stat))
      (lyskom-traverse faq (lyskom-get-aux-item 
                            (conf-stat->aux-items conf-stat)
                            14)
        (lyskom-print-comment-like-aux faq conf-stat)))))

(defun lyskom-print-comment-like-aux (item object)
  (let* ((text-no (string-to-int (aux-item->data item)))
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         (text-stat nil)
         (text nil))
    (unless kom-deferred-printing
      (blocking-do-multiple ((x-text (get-text text-no))
                             (x-text-stat (get-text-stat text-no)))
        (setq text-stat x-text-stat text x-text)))

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    (cond ((or text-stat (not kom-deferred-printing))
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           (lyskom-insert-comment-like-aux item text-no text-stat text object))
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          (t (let ((defer-info (lyskom-create-defer-info
                                'get-text-stat
                                text-no
                                'lyskom-insert-deferred-comment-like-aux
                                (point-max-marker)
                                (length lyskom-defer-indicator)
                                nil     ; Filled in later
                                (list item object text-no))))
               (lyskom-format-insert "%#1s\n" lyskom-defer-indicator)
               (lyskom-defer-insertion defer-info))))))

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(defun lyskom-insert-comment-like-aux (item text-no text-stat text object)
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  (let* ((author (if text-stat (text-stat->author text-stat) nil))
         (mx-from (car (lyskom-get-aux-item (text-stat->aux-items text-stat)
                                            17)))
         (mx-author (car (lyskom-get-aux-item (text-stat->aux-items text-stat)
                                              16)))
         (formats (lyskom-aux-item-definition-field item 'text-header-line))
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         (subject (lyskom-print-faq-format-subject text text-stat text-no))
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         content-type
         )
    (if (and mx-from
             (setq content-type
                   (car (lyskom-get-aux-item (text-stat->aux-items 
                                              text-stat) 1))))
        (progn (string-match "^\\(\\S-+\\)" (aux-item->data content-type))
               (setq content-type (format "(%s) "
                                          (aux-item->data content-type))))
      (setq content-type ""))
    (setq author (or (lyskom-format-mx-author mx-from mx-author) author))

    (lyskom-format-insert (cond ((not (listp formats)) formats)
                                ((<= (length formats) 1) (car formats))
                                (author (elt formats 1))
                                (t (elt formats 0)))
                          text-no
                          author
                          content-type
                          (lyskom-aux-item-terminating-button item
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                                                              object)
                          subject)
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    (lyskom-insert "\n")))

;;; FIXME: This contains code that duplicates the code in 
;;; lyskom-insert-deferred-header-comm. That's a BAD THING.

(defun lyskom-insert-deferred-comment-like-aux (text-stat defer-info)
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  (initiate-get-text 'deferred
                     'lyskom-insert-deferred-comment-like-aux-2
                     (elt (defer-info->data defer-info) 2)
                     text-stat
                     defer-info))

(defun lyskom-insert-deferred-comment-like-aux-2 (text text-stat defer-info)
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  (let* ((author (if text-stat (text-stat->author text-stat) nil))
         (item (elt (defer-info->data defer-info) 0))
         (object (elt (defer-info->data defer-info) 1))
         (text-no (elt (defer-info->data defer-info) 2))
         (mx-from (car (lyskom-get-aux-item (text-stat->aux-items text-stat)
                                            17)))
         (mx-author (car (lyskom-get-aux-item (text-stat->aux-items text-stat)
                                              16)))
         (formats (lyskom-aux-item-definition-field item 'text-header-line))
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         (subject (lyskom-print-faq-format-subject text text-stat text-no))
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         content-type
         )
    (if (and mx-from
             (setq content-type
                   (car (lyskom-get-aux-item (text-stat->aux-items 
                                              text-stat) 1))))
        (progn (string-match "^\\(\\S-+\\)" (aux-item->data content-type))
               (setq content-type (format "(%s) "
                                          (aux-item->data content-type))))
      (setq content-type ""))
    (setq author (or (lyskom-format-mx-author mx-from mx-author) author))

    (set-defer-info->format defer-info 
                            (cond ((not (listp formats)) formats)
                                  ((<= (length formats) 1) (car formats))
                                  (author (elt formats 1))
                                  (t (elt formats 0))))
    (lyskom-replace-deferred defer-info
                             text-no
                             author
                             content-type
                             (lyskom-aux-item-terminating-button item
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                                                                 object)
                             subject)))
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;;; ================================================================
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;;;          Återse det kommenterade - View commented text
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;;; Author: Inge Wallin
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;;; Modified by: David Kågedal, Johan Sundström
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(def-kom-command kom-view-commented-text (text-no)
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  "View the commented text.
If the current text is comment to (footnote to) several text then the first
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text is shown and a REVIEW list is built to shown the other ones. If the
optional arg TEXT-NO is present review the text that text commented instead."
  (interactive (list (lyskom-read-text-no-prefix-arg 'review-commented-q)))
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  (if text-no
      (progn
	(lyskom-tell-internat 'kom-tell-read)
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        (unless kom-review-uses-cache
          (cache-del-text-stat text-no))
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	(lyskom-view-commented-text
	 (blocking-do 'get-text-stat text-no)))
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    (lyskom-insert-string 'confusion-what-to-view)))
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(def-kom-command kom-view-previous-commented-text (text-no)
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  "View the text the previous text commented.
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If the previously viewed text is a comment to (footnote to) several
texts then the first text is shown and a REVIEW list is built to show
the other ones."
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  (interactive (list (lyskom-read-text-no-prefix-arg 'review-commented-q nil
                                                     lyskom-previous-text)))
  (cond (text-no
         (lyskom-tell-internat 'kom-tell-read)
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        (unless kom-review-uses-cache
          (cache-del-text-stat text-no))
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         (lyskom-view-commented-text
          (blocking-do 'get-text-stat lyskom-previous-text)))
        (t (lyskom-insert-string 'confusion-what-to-view))))
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(defun lyskom-text-stat-commented-texts (text-stat)
  "Return a list of the text-nos that TEXT-STAT is a comment or footnote to."
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  (let* ((misc-info-list (and text-stat
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                              (text-stat->misc-info-list text-stat)))
         (misc-infos (and misc-info-list
                          (append (lyskom-misc-infos-from-list
                                   'COMM-TO misc-info-list)
                                  (lyskom-misc-infos-from-list
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                                   'FOOTN-TO misc-info-list)))))
    (and misc-infos
	 (mapcar
	  (function
	   (lambda (misc-info)
	     (if (equal (misc-info->type misc-info)
			'COMM-TO)
		 (misc-info->comm-to misc-info)
	       (misc-info->footn-to misc-info))))
	  misc-infos))))


(defun lyskom-view-commented-text (text-stat)
  "Handles the return from the initiate-get-text-stat, displays and builds list."
  (let ((text-nos (lyskom-text-stat-commented-texts text-stat)))
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    (if text-nos
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        (progn
          (lyskom-format-insert 'review-text-no 
                                (car text-nos))
          (if (cdr text-nos)
              (read-list-enter-read-info
               (lyskom-create-read-info
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                'REVIEW nil (lyskom-review-get-priority)
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                (lyskom-create-text-list (cdr text-nos))
                lyskom-current-text)
               lyskom-reading-list t))
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          (unless kom-review-uses-cache
            (cache-del-text-stat (car text-nos)))
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          (lyskom-view-text (car text-nos)
			    nil nil nil 
			    nil nil nil
			    t))
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      (lyskom-insert-string 'no-comment-to))))
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(defun lyskom-misc-infos-from-list (type list)
  "Get all the misc-infos from the misc-info-list LIST with the same type
as TYPE. If no such misc-info, return NIL"
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  (let ((result nil))
    (while list
      (when (equal type (misc-info->type (car list)))
        (setq result (cons (car list) result)))
      (setq list (cdr list)))
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    (nreverse result)))
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;;; ================================================================
;;;                         Brev - Send letter

;;; Author: Inge Wallin
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;;; Rewritten using read-conf-no by Linus Tolke (4=>1)
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(def-kom-command kom-send-letter (&optional pers-no)
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  "Send a personal letter to a person or a conference."
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  (interactive)
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  (condition-case nil
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      (progn
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        (lyskom-tell-internat 'kom-tell-write-letter)
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	;; If there was a motd, which is now removed we have to
	;; refetch the conf-stat to know that.
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        (let* ((tono (or pers-no
                         (lyskom-read-conf-no
                          (lyskom-get-string 'who-letter-to)
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                          '(all) nil nil t)))
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               (conf-stat (blocking-do 'get-conf-stat tono)))
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	  (cache-del-conf-stat tono)
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          (if (if (zerop (conf-stat->msg-of-day conf-stat))
                  t
                (progn
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                  (recenter 1)
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                  (lyskom-format-insert 'has-motd 
                                        conf-stat)
                  (lyskom-view-text (conf-stat->msg-of-day conf-stat))
                  (if (lyskom-j-or-n-p (lyskom-get-string 'motd-persist-q))
                      t
                    nil)))
              (if (= tono lyskom-pers-no)
                  (lyskom-edit-text lyskom-proc
                                    (lyskom-create-misc-list 'recpt tono)
                                    "" "")
                (lyskom-edit-text lyskom-proc
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                                  (if (lyskom-get-membership tono)
                                      (lyskom-create-misc-list 'recpt tono)
                                      (lyskom-create-misc-list 
                                       'recpt tono
                                       'recpt lyskom-pers-no))
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                                  "" "")))))
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    (quit (signal 'quit nil))))
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;;; ================================================================
;;;           Bli medlem i m|te - Become a member of a conference
;;;             Addera medlem - Add somebody else as a member

;;; Author: ???
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;;; Rewritten by: David K}gedal
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;; Add another person

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(def-kom-command kom-add-member ()
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  "Add a person as a member of a conference.
Ask for the name of the person, the conference to add him/her to."
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  (interactive)
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  (let* ((who (lyskom-read-conf-stat (lyskom-get-string 'who-to-add)
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				     '(pers) nil nil t))
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	 (whereto (lyskom-read-conf-stat (lyskom-get-string 'where-to-add)
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					 '(all) nil nil t))
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	 (pers-stat (blocking-do 'get-pers-stat (conf-stat->conf-no who))))
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    (lyskom-add-member-answer (lyskom-try-add-member whereto who 
                                                     pers-stat nil nil t)
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			      whereto who)))
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;; Add self

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(def-kom-command kom-add-self (&optional conf)
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  "Add this person as a member of a conference."
  (interactive)
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  (let* ((whereto (if conf (blocking-do 'get-conf-stat conf)
                    (lyskom-read-conf-stat 
                     (lyskom-get-string 'where-to-add-self)
                     '(all) nil "" t)))
         (who (blocking-do 'get-conf-stat lyskom-pers-no))
         (pers-stat (blocking-do 'get-pers-stat lyskom-pers-no))
         (mship (lyskom-get-membership (conf-stat->conf-no whereto) t)))
  
    ;; Fake kom-membership-default-priority if this is a passive membership
    ;; This will suppress the normal "which priority" question. Ugly hack.

    (let ((kom-membership-default-priority
           (if (and mship (membership-type->passive (membership->type mship)))
               (membership->priority mship)
             kom-membership-default-priority)))
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      (lyskom-add-member-answer (lyskom-try-add-member whereto who pers-stat nil nil t)
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                                whereto who))))


(def-kom-command kom-change-priority (&optional conf)
  "Change the priority of a conference."
  (interactive)
  (let* ((conf-stat (if conf (blocking-do 'get-conf-stat conf)
                      (lyskom-read-conf-stat 
                       (lyskom-get-string 'change-priority-for-q)
                       '(all) nil "" t)))
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         (mship (lyskom-get-membership (conf-stat->conf-no conf-stat) t))
	 (kom-membership-default-priority nil))
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    (blocking-do-multiple ((who (get-conf-stat lyskom-pers-no))
                           (pers-stat (get-pers-stat lyskom-pers-no)))
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      (cond ((and (null mship) conf-stat)
             (lyskom-format-insert 'not-member-of-conf conf-stat))
	    ((null conf-stat)
	     (lyskom-format-insert 'no-such-conf))
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            (t (lyskom-add-member-answer
                (lyskom-try-add-member conf-stat who pers-stat nil
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                                       'change-priority-for t)
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                conf-stat who))))))
                                                           
                                     
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;;; NOTE: This function is also called from lyskom-go-to-conf-handler
;;;       and from lyskom-create-conf-handler.

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(defun lyskom-add-member-by-no (conf-no pers-no &optional thendo &rest data)
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  "Fetch info to be able to add a person to a conf.
Get the conf-stat CONF-NO for the conference and the conf-stat and pers-stat 
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for person PERS-NO and send them into lyskom-try-add-member."
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  (blocking-do-multiple ((whereto (get-conf-stat conf-no))
                         (who (get-conf-stat pers-no))
                         (pers-stat (get-pers-stat pers-no)))
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    (let ((result (lyskom-try-add-member whereto who pers-stat nil nil t)))
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      (lyskom-add-member-answer result whereto who)
      (if thendo
          (apply thendo data))
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      (car result))))
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(defun lyskom-try-add-member (conf-conf-stat 
                              pers-conf-stat 
                              pers-stat
                              membership-type
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                              &optional message-string
                              need-extra-information)
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  "Add a member to a conference.
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Args: CONF-CONF-STAT PERS-CONF-STAT PERS-STAT
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CONF-CONF-STAT: the conf-stat of the conference the person is being added to
PERS-CONF-STAT: the conf-stat of the person being added.
PERS-STAT: the pers-stat of the person being added.
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Optional MESSAGE-STRING is the message to print before making server call.
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Returns t if it was possible, otherwise nil.

If optional NEED-EXTRA-INFORMATION is non-nil, the return value will be
a list where the first element is the result of add-member and the second
is the position where the membership was placed."
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  (if (or (null conf-conf-stat)
	  (null pers-conf-stat))
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      nil				; We have some problem here.
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    (let ((priority
	   (if (/= lyskom-pers-no (conf-stat->conf-no pers-conf-stat))
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	       (lyskom-read-num-range 0 255
                                      (lyskom-get-string 'priority-q)
                                      nil 100)
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	     (if (and (numberp kom-membership-default-priority)
		      (< kom-membership-default-priority 256)
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		      (>= kom-membership-default-priority 0))
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		 kom-membership-default-priority
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	       (lyskom-read-num-range 0 255 (lyskom-get-string 'priority-q)))))
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	  (where
	   (if (/= lyskom-pers-no (conf-stat->conf-no pers-conf-stat))
	       1			; When adding someone else
	     (cond
	      ((and (numberp kom-membership-default-placement)
		    (>= kom-membership-default-placement 0))
	       kom-membership-default-placement)
	      ((eq kom-membership-default-placement 'first)
	       0)
	      ((eq kom-membership-default-placement 'last)
	       (length lyskom-membership))
	      (t
	       (lyskom-read-num-range
		0 (pers-stat->no-of-confs pers-stat)
		(lyskom-format 'where-on-list-q
			       (length lyskom-membership))))))))

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      ;;
      ;; Adding ourselves. Adjust where so the membership
      ;; list remains sorted. Find the closest position to
      ;; where at which we can put the membership and keep
      ;; the membership lsit sorted.
      ;;

      (when (eq lyskom-pers-no (conf-stat->conf-no pers-conf-stat))
        (let ((mship-list lyskom-membership)
              (mship nil)
              (index 0)
              (found nil))
          (while mship-list
            (setq mship (car mship-list)
                  mship-list (cdr mship-list))
            (cond ((> (membership->priority mship) priority))
                  ((< (membership->priority mship) priority) 
                   (setq where index mship-list nil found t))
                  ((and (= (membership->priority mship) priority)
                        (= index where))
                   (setq mship-list nil found t))
                  ((and (= (membership->priority mship) priority)
                        (> index where))
                   (setq where index mship-list nil found t)))
            (setq index (1+ index))
            (unless found (setq where (1+ index))))))

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      (when (null membership-type)
        (setq membership-type 
              (lyskom-create-membership-type nil nil nil nil
                                             nil nil nil nil)))

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      (if message-string
          (lyskom-format-insert message-string
                                pers-conf-stat
                                conf-conf-stat)
        (if (= (conf-stat->conf-no pers-conf-stat)
               lyskom-pers-no)
            (lyskom-format-insert 'member-in-conf
                                  conf-conf-stat)
          (lyskom-format-insert 'add-member-in
                                pers-conf-stat
                                conf-conf-stat)))
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      (lyskom-ignoring-async (18 lyskom-pers-no
                                 (conf-stat->conf-no conf-conf-stat))
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        (let ((res (blocking-do 'add-member 
                                (conf-stat->conf-no conf-conf-stat)
                                (conf-stat->conf-no pers-conf-stat)
                                priority where
                                membership-type)))
          (if need-extra-information
              (list res where)
            res))))))


(defun lyskom-add-member-answer (answer conf-conf-stat
                                        pers-conf-stat)
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  "Handle the result from an attempt to add a member to a conference."
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  (let ((pos (if (consp answer) (elt answer 1) nil))
        (answer (if (consp answer) (elt answer 0) answer)))
    (if (null answer)
        (progn
          (lyskom-insert-string 'nope)
          (let* ((errno lyskom-errno)
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                 (err-stat lyskom-err-stat)
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                 (is-supervisor (lyskom-is-supervisor (conf-stat->conf-no conf-conf-stat)
                                                      lyskom-pers-no))
                 (is-member (lyskom-is-member (conf-stat->conf-no conf-conf-stat)
                                              (conf-stat->conf-no pers-conf-stat)))
                 (rd-prot (conf-type->rd_prot (conf-stat->conf-type conf-conf-stat))))


            (cond (is-member
                   (lyskom-format-insert 'add-already-member 
                                         pers-conf-stat
                                         conf-conf-stat))
                  ((and rd-prot is-supervisor)
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                   (lyskom-insert-error errno err-stat))
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                  (rd-prot (let ((supervisorconf (blocking-do
                                                  'get-conf-stat
                                                  (conf-stat->supervisor conf-conf-stat))))
                             (if supervisorconf
                                 (lyskom-format-insert 'is-read-protected-contact-supervisor
                                                       conf-conf-stat
                                                       supervisorconf)
                               (lyskom-format-insert 'cant-find-supervisor
                                                     conf-conf-stat))))

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                  (t (lyskom-insert-error errno err-stat)))))
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      ;;+++Borde {ndra i cachen i st{llet.
      (cache-del-pers-stat (conf-stat->conf-no pers-conf-stat))
      ;;+++Borde {ndra i cachen i st{llet.
      (cache-del-conf-stat (conf-stat->conf-no conf-conf-stat))
      (if (= (conf-stat->conf-no pers-conf-stat)
             lyskom-pers-no)
          (let ((mship (blocking-do 'query-read-texts
                                    lyskom-pers-no 
                                    (conf-stat->conf-no conf-conf-stat))))
            (unless (membership->position mship)
              (set-membership->position mship pos))
            (lyskom-add-membership mship
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                                   conf-conf-stat
                                   t)))
      (lyskom-insert-string 'done))))
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(defun lyskom-add-membership (membership conf-no-or-stat &optional blocking)
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  "Adds MEMBERSHIP to the sorted list of memberships.
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If BLOCKING is non-nil, block while reading the conference map until at 
least one text has been seen. CONF-NO-OR-STAT is the conf-no to add 
unless BLOCKING is t, in which cast it is the conf-stat."
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  (if membership
      (progn
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	(lyskom-insert-membership membership)
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        (if blocking
            (lyskom-fetch-start-of-map conf-no-or-stat membership)
          (lyskom-prefetch-map conf-no-or-stat membership))
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        (lyskom-run-hook-with-args 'lyskom-add-membership-hook
                                   membership))
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    (lyskom-insert-string 'conf-does-not-exist)))
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;;; ================================================================
;;;     Uttr{d - Subtract yourself as a member from a conference
;;;     Uteslut medlem - Subtract somebody else as a member

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;;; Author: David Byers
;;; Based on code by Inge Wallin
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;; Subtract another person

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(def-kom-command kom-sub-member ()
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  "Subtract a person as a member from a conference. Ask for the name
of the person."
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  (interactive)
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  (lyskom-sub-member
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   (lyskom-read-conf-stat (lyskom-get-string 'who-to-exclude)
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                          '(pers) nil "" t)
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   (lyskom-read-conf-stat (lyskom-get-string 'where-from-exclude) 
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			  '(all) nil "" t)))
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(def-kom-command kom-sub-self (&optional conf)
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  "Subtract this person as a member from a conference."
  (interactive)
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  (lyskom-sub-member 
   (blocking-do 'get-conf-stat lyskom-pers-no)
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   (if conf (blocking-do 'get-conf-stat conf)
     (lyskom-read-conf-stat (lyskom-get-string 'leave-what-conf)
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                            '(all) nil 
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                            (let ((ccn 
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                                   (if (or (null lyskom-current-conf)
                                           (zerop lyskom-current-conf))
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                                       ""
                                     (conf-stat->name
                                      (blocking-do 'get-conf-stat
                                                   lyskom-current-conf)))))
                              (if ccn
                                  (cons ccn 0)
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                                "")) t))))
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(defun lyskom-sub-member (pers conf)
  "Remove the person indicated by PERS as a member of CONF."
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  (let* ((reply nil)
         (self (= (conf-stat->conf-no pers) lyskom-pers-no))
         (mship (and self 
                     kom-unsubscribe-makes-passive
                     (lyskom-get-membership (conf-stat->conf-no conf))))
         (passivate (and mship
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                         (lyskom-have-call 102) ; set-membership-type
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                         (not (membership-type->passive
                               (membership->type mship))))))

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    (cond ((null pers) (lyskom-insert-string 'error-fetching-person))
	  ((null conf) (lyskom-insert-string 'error-fetching-conf))
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          (passivate 
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           (lyskom-prefetch-cancel-prefetch-map (conf-stat->conf-no conf))
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           (lyskom-format-insert 'unsubscribe-to conf)
           (set-membership-type->passive (membership->type mship) t)
           (setq reply (blocking-do 'set-membership-type
                                    (conf-stat->conf-no pers)
                                    (conf-stat->conf-no conf)
                                    (membership->type mship)))
           (if (not reply)
               (lyskom-format-insert 'unsubscribe-failed
                                     (lyskom-get-string 'You)
                                     conf)
             (lyskom-insert-string 'done)
             (lyskom-format-insert 'passivate-done conf)
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             (when (= (conf-stat->conf-no conf) lyskom-current-conf)
               (lyskom-leave-current-conf))
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	     (read-list-delete-read-info (conf-stat->conf-no conf)
					 lyskom-to-do-list)))
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	  (t
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           (when self
             (lyskom-prefetch-cancel-prefetch-map (conf-stat->conf-no conf)))

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	   (if self
	       (lyskom-format-insert 'unsubscribe-to conf)
	     (lyskom-format-insert 'exclude-from pers conf))

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           (lyskom-ignoring-async (8 (conf-stat->conf-no conf))
             (setq reply (blocking-do 'sub-member
                                      (conf-stat->conf-no conf)
                                      (conf-stat->conf-no pers))))
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	   (if self
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	       (lyskom-remove-membership (conf-stat->conf-no conf)))
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	   (if (not reply)
	       (lyskom-format-insert 'unsubscribe-failed
				     (if self
					 (lyskom-get-string 'You)
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				       (conf-stat->name pers))
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				     conf)
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	     (lyskom-insert-string 'done)
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	     (when (and self (= (conf-stat->conf-no conf)
                              lyskom-current-conf))
               (lyskom-leave-current-conf))
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	     (read-list-delete-read-info (conf-stat->conf-no conf)
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					 lyskom-to-do-list))))))
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;;; ================================================================
;;;                 Skapa m|te - Create a conference

;;; Author: ???


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(def-kom-command kom-create-conf (&optional name)
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  "Create a conference."
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  (interactive)
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  (let* ((conf-name (or name
			(lyskom-read-string
			 (lyskom-get-string 'name-of-conf))))
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	 (open (j-or-n-p (lyskom-get-string 'anyone-member)))
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	 (secret (if (not open)
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		     (j-or-n-p (lyskom-get-string 'secret-conf))))
	 (orig (j-or-n-p (lyskom-get-string 'comments-allowed)))
         (anarchy (j-or-n-p (lyskom-get-string 'anonymous-allowed)))
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         (secmem (and (lyskom-have-feature long-conf-types)
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                      (not (lyskom-j-or-n-p (lyskom-get-string 'secret-members-allowed)))))
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	 (conf-no (blocking-do 'create-conf 
			       conf-name
			       (lyskom-create-conf-type (not open) 
							(not orig)
							secret
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							nil
                                                        anarchy
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                                                        secmem
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                                                        nil
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                                                        nil)
                               nil)))
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    (if (null conf-no)
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	(progn
	  (lyskom-format-insert 'could-not-create-conf
				conf-name)
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	  (lyskom-insert-error))
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      (progn
	(let ((conf-stat (blocking-do 'get-conf-stat conf-no)))
	  (lyskom-format-insert 'created-conf-no-name 
				(or conf-stat conf-no)
				(or conf-stat conf-name)
				(if conf-stat
				    (lyskom-default-button 'conf conf-stat)
				  nil)))
	(lyskom-scroll)
	(lyskom-add-member-by-no conf-no lyskom-pers-no
				 (if secret
				     nil ; Don't write a presentation
				   'lyskom-create-conf-handler-2)
				 conf-no conf-name)))))
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(defun lyskom-create-conf-handler-2 (conf-no conf-name)
  "Starts editing a presentation for the newly created conference.
This does lyskom-end-of-command"
  (lyskom-tell-internat 'kom-tell-conf-pres)
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  (let ((conf (blocking-do 'get-conf-stat conf-no)))
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    (if conf
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        (lyskom-dispatch-edit-text lyskom-proc
                                   (lyskom-create-misc-list
                                    'recpt
                                    (server-info->conf-pres-conf 
                                     lyskom-server-info))
                                   conf-name ""
                                   'lyskom-set-presentation conf-no))))
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(defun lyskom-set-presentation (text-no conf-no)
  "Set presentation of a conference. Args: text-no conf-no."
  (initiate-set-presentation 'background nil conf-no text-no)
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  (cache-del-conf-stat conf-no))	;+++Borde {ndra i cachen i st{llet.
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					;+++ Kan tas bort n{r det existerar 
					;asynkrona meddelanden som talar om att
					;n}got {r {ndrat.
    

(defun lyskom-set-conf-motd (text-no conf-no)
  "Set motd of a conference. Args: text-no conf-no."
  (initiate-set-conf-motd 'background nil conf-no text-no)
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  (cache-del-conf-stat conf-no))	;+++Borde {ndra i cachen i st{llet.
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					;+++ Kan tas bort n{r det existerar 
					;asynkrona meddelanden som talar om att
					;n}got {r {ndrat.
    

;;; ================================================================
;;;                  Kommentera - write comment
;;; Author: ???
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;;; FIXME: Does not use def-kom-command
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(defun kom-write-comment (text-no)
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  "Write a comment to a text.
If optional arg TEXT-NO is present write a comment to that text instead."
  (interactive (list 
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                (let ((lyskom-current-command 'kom-write-comment))
                  (lyskom-read-text-no-prefix-arg 'what-comment-no))))
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  (lyskom-start-of-command (concat 
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			    (lyskom-command-name 'kom-write-comment)
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			    (if text-no 
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				(lyskom-format " (%#1n)" text-no)
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			      "")))
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  (unwind-protect
      (if text-no
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          (blocking-do-multiple ((text (get-text text-no))
                                 (text-stat (get-text-stat text-no)))
            (when (or (null (text-stat-find-aux text-stat 4))
                      (lyskom-j-or-n-p 
                       (lyskom-get-string 'no-comments-q)))
              (if (and (text-stat-find-aux text-stat 5)
                       (lyskom-j-or-n-p
                        (lyskom-get-string 'private-answer-q)))
                  (lyskom-private-answer-soon
                   text-stat
                   text
                   text-no)
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              (lyskom-write-comment-soon text-stat
                                         text
                                         text-no
                                         'comment))))
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        (lyskom-insert-string 'confusion-who-to-reply-to))
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    (lyskom-end-of-command)))


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(def-kom-command kom-write-footnote (text-no)
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  "Write a footnote to a text.
If optional arg TEXT-NO is present write a footnote to that text instead."
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  (interactive (list (lyskom-read-text-no-prefix-arg 'what-footnote-no nil
                                                     'last-seen-written)))
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  (if text-no
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      (lyskom-write-comment-soon
       (blocking-do 'get-text-stat text-no)
       (blocking-do 'get-text text-no)
       text-no 'footnote)
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    (lyskom-insert-string 'confusion-what-to-footnote)))
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(def-kom-command kom-comment-previous (text-no)
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  "Write a comment to previously viewed text."
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  (interactive (list (lyskom-read-text-no-prefix-arg 'what-comment-no nil
                                                     lyskom-previous-text)))
  (if text-no
      (blocking-do-multiple ((text-stat (get-text-stat text-no))
                             (text (get-text text-no)))
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        (when (or (null text-stat)
                  (null text)
                  (null (text-stat-find-aux text-stat 4))
                  (lyskom-j-or-n-p 
                   (lyskom-get-string 'no-comments-q)))
          (if (and (text-stat-find-aux text-stat 5)
                   (lyskom-j-or-n-p
                    (lyskom-get-string 'private-answer-q)))
              (lyskom-private-answer-soon
               text-stat
               text
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               text-no)
            (lyskom-write-comment-soon
             text-stat
             text
             text-no
             'comment))))
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    (lyskom-insert-string 'confusion-what-to-comment)))
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(defun lyskom-write-comment-soon (text-stat text text-no type)
  "Write a comment to the text with TEXT-STAT, TEXT and, TEXT-NO.
TYPE is either 'comment or 'footnote."
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  (let ((str (and text-stat text (text->decoded-text-mass text text-stat))))
    (cond
     ;; Text not found?
     ((or (null text-stat)
          (null text))
      (lyskom-format-insert 'cant-read-textno text-no))
     ;; Give header.
     ((string-match "\n" str)
      (lyskom-write-comment text-stat
                            (substring str 0 (match-beginning 0))
                            type))
     ;; The commented text had no header.
     (t (lyskom-write-comment text-stat "" type)))))
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(defun lyskom-write-comment (text-stat subject type)
  "Write a comment to the text associated with TEXT-STAT.
The default subject is SUBJECT. TYPE is either 'comment or 'footnote."
  (if (null text-stat)
      (progn
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        (lyskom-insert-string 'confusion-what-to-comment))
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    (let ((ccrep nil)
          (bccrep nil))
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      (lyskom-tell-internat (if (eq type 'comment)
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                                'kom-tell-write-comment
                              'kom-tell-write-footnote))
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      (let (data)
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        (mapcar 
         (function
          (lambda (misc-info)
            (cond
             ((eq 'RECPT (misc-info->type misc-info))
              (setq data 
                    (cons (blocking-do 'get-conf-stat 
                                       (misc-info->recipient-no misc-info))
                          data)))
             ((and (eq type 'footnote)
                   (eq 'CC-RECPT (misc-info->type misc-info)))
              (setq ccrep (cons (misc-info->recipient-no misc-info) 
                                ccrep))
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              (setq data (cons (blocking-do 'get-conf-stat
                                            (misc-info->recipient-no misc-info))
                               data)))
             ((and (eq type 'footnote)
                   (eq 'BCC-RECPT (misc-info->type misc-info)))
              (setq bccrep (cons (misc-info->recipient-no misc-info) 
                                 bccrep))
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              (setq data (cons (blocking-do 'get-conf-stat
                                            (misc-info->recipient-no misc-info))
                               data))))))
         (text-stat->misc-info-list text-stat))
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        (lyskom-comment-recipients (nreverse data)
                                   lyskom-proc 
                                   text-stat
                                   subject 
                                   type 
                                   (nreverse ccrep) 
                                   (nreverse bccrep))))))
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(defun lyskom-comment-recipients (data lyskom-proc text-stat
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				       subject type ccrep bccrep)
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  "Compute recipients to a comment to a text.
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Args: DATA, LYSKOM-PROC TEXT-STAT SUBJECT TYPE CCREP BCCREP.
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DATA is a list of all the recipients that should receive this text.
If DATA contains more than one conference the user is asked (using y-or-n-p)
if all conferences really should receive the text.
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The call is continued to the lyskom-edit-text.
TYPE is info whether this is going to be a comment of footnote.
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CCREP is a list of all recipients that are going to be cc-recipients.
BCCREP is a list of all recipient that are going to be bcc-recipients."
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  (condition-case nil
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      ;; Catch any quits
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      (progn
	;; Filter multiple recipients through y-or-n-p.
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	(if (and (eq kom-confirm-multiple-recipients 'before)
                 (> (length data) 1)
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		 (not (and (= (length data) 2)
			   (or (= lyskom-pers-no (conf-stat->conf-no
						  (car data)))
			       (= lyskom-pers-no (conf-stat->conf-no
						  (car (cdr data))))))))
	    (let ((new-data nil))
	      (while data
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		(if (lyskom-j-or-n-p (lyskom-format 'comment-keep-recpt-p
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					     (conf-stat->name (car data))))
		    (setq new-data (cons (car data) new-data)))
		(setq data (cdr data)))
	      (setq data (nreverse new-data))))	    

	(let* ((member nil)
	       (recver (lyskom-create-misc-list
			(cond 
			 ((eq type 'comment) 'comm-to)
			 ((eq type 'footnote) 'footn-to)
			 (t (signal 'lyskom-internal-error
				    (list "Unknown comment type" type))))
			(text-stat->text-no text-stat)))
	       (recpts nil))
	  (while data
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	    (let* ((conf-stat (car data))
                   (confno (conf-stat->conf-no conf-stat))
                   (commno (if (eq type 'footnote)
                               confno
                             (conf-stat->comm-conf conf-stat))))
	      (if (memq commno recpts)
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		  nil
		(setq recver
		      (append recver
			      (list
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			       (cons (cond
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                                      ((memq confno ccrep) 'cc-recpt)
                                      ((memq confno bccrep) 'bcc-recpt)
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                                      (t 'recpt))
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                                     commno))))
		(if (lyskom-get-membership commno)
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		    (setq member t))
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		(setq recpts (cons commno recpts))))
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	    (setq data (cdr data)))
	  ;; Add the user to the list of recipients if he isn't a member in
	  ;; any of the recipients.
	  (if (not member)
	      (setq recver (append recver
				   (list (cons 'recpt lyskom-pers-no)))))
	  (lyskom-edit-text lyskom-proc 
			    recver
			    subject "")))

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    (quit (signal 'quit nil))))
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;;; ================================================================
;;;                Personligt svar - personal answer

;;; Author: ???
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;;; Rewritten using blocking-do by: Linus Tolke
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(def-kom-command kom-private-answer (text-no)
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  "Write a private answer to the current text.
If optional arg TEXT-NO is present write a private answer to
that text instead."
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  (interactive (list (lyskom-read-text-no-prefix-arg 'what-private-no)))
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  (if text-no
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      (blocking-do-multiple ((text-stat (get-text-stat text-no))
                             (text (get-text text-no)))
        (when (or (null (text-stat-find-aux text-stat 4))
                  (lyskom-j-or-n-p 
                   (lyskom-get-string 'no-comments-q)))
          (lyskom-private-answer-soon text-stat text text-no)))
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    (lyskom-insert-string 'confusion-who-to-reply-to)))
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(defun lyskom-private-answer-soon (text-stat text text-no)
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  "Write a private answer to TEXT-STAT, TEXT."
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  (if (and text-stat text)
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      (let ((str (text->decoded-text-mass text text-stat)))
        (if (string-match "\n" str)
            (lyskom-private-answer text-stat
                                   (substring str
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                                              0 (match-beginning 0)))
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          (lyskom-private-answer text-stat "")))
    (lyskom-format-insert 'no-such-text-no text-no)))
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(defun lyskom-private-answer (text-stat subject)
  "Write a private answer. Args: TEXT-STAT SUBJECT."
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  (cond ((null text-stat)
         (lyskom-insert-string 'confusion-what-to-answer-to))
        ((= (text-stat->author text-stat) 0)
         (lyskom-insert-string 'personal-comment-to-anonymous))
        (t
         (lyskom-tell-internat 'kom-tell-write-reply)
         (cache-del-conf-stat (text-stat->author text-stat))
         (let* ((conf-stat (blocking-do 'get-conf-stat
                                        (text-stat->author text-stat))))
           (if (if (zerop (conf-stat->msg-of-day conf-stat))
                   t
                 (progn
                   (recenter 1)
                   (lyskom-format-insert 'has-motd
                                         conf-stat)
                   (lyskom-view-text (conf-stat->msg-of-day conf-stat))
                   (if (lyskom-j-or-n-p (lyskom-get-string 'motd-persist-q))
                       t
                     nil)))
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               (lyskom-edit-text lyskom-proc
                                 (if (= (text-stat->author text-stat) lyskom-pers-no)
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                                     (lyskom-create-misc-list
                                      'recpt
                                      (text-stat->author text-stat))
                                   (lyskom-create-misc-list
                                    'comm-to (text-stat->text-no text-stat)
                                    'recpt (text-stat->author text-stat)
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                                    'recpt lyskom-pers-no))
                                 subject ""))))))
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;;; ================================================================
;;;    Personligt svar p} f|reg}ende - kom-private-answer-previous

;;; Author: ceder
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;;; Rewritten using blocking-do by: Linus Tolke
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(def-kom-command kom-private-answer-previous (text-no)
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  "Write a private answer to previously viewed text."
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  (interactive (list (lyskom-read-text-no-prefix-arg 'what-private-no nil
                                                     lyskom-previous-text)))
  (if text-no
      (blocking-do-multiple ((text-stat (get-text-stat text-no))
                             (text (get-text text-no)))
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        (when (or (null (text-stat-find-aux text-stat 4))
                  (lyskom-j-or-n-p 
                   (lyskom-get-string 'no-comments-q)))
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          (lyskom-private-answer-soon text-stat text text-no)))
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    (lyskom-insert-string 'confusion-who-to-reply-to)))
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;;; ================================================================
;;;                         Sluta - quit

;;; Author: ???


(defun kom-quit (&optional arg)
  "Quit session. Kill process and buffer-local variables.
If optional argument is non-nil then dont ask for confirmation."
  (interactive "P")
  (lyskom-start-of-command 'kom-quit t)
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  (let ((do-end-of-command t))
    (unwind-protect
        (setq do-end-of-command
              (cond
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               ((and (lyskom-buffers-of-category 'write-texts)
                     (display-buffer 
                      (car (lyskom-buffers-of-category 'write-texts)))
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                     (not (lyskom-ja-or-nej-p
                           (lyskom-get-string 'quit-in-spite-of-unsent))))
                t)
               ((or arg (lyskom-ja-or-nej-p (lyskom-get-string 'really-quit)))
                (lyskom-quit) nil)
               (t t)))
      (if do-end-of-command (lyskom-end-of-command)))))
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(defun lyskom-quit ()
  "Quit a session. Kill process and buffer-local variables.
Don't ask for confirmation."
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    (initiate-logout 'main nil)
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    (lyskom-remove-unread-buffer lyskom-buffer)
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    (set-process-sentinel lyskom-proc nil)
    (delete-process lyskom-proc)
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    (lyskom-insert-string (lyskom-get-string-sol 'session-ended))
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    (lyskom-scroll)
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    (setq mode-line-process (lyskom-get-string 'mode-line-down))
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    (run-hooks 'kom-quit-hook))
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;;; ================================================================
;;;     	[ndra presentation - Change presentation 
;;;	         S{tta lapp p} d|rren - Change conf-motd

;;; Author: Inge Wallin
;;; Changed by Linus Tolke


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(def-kom-command kom-change-presentation ()
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  "Change presentation for a person or a conference."
  (interactive)
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  (lyskom-change-pres-or-motd-2
   (let ((no (lyskom-read-conf-no 
	      (lyskom-get-string 'what-to-change-pres-you)
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	      '(all) t nil t)))
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     (if (zerop no)
	 (setq no lyskom-pers-no))
     (blocking-do 'get-conf-stat no))
   'pres))
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(def-kom-command kom-change-server-faq ()
  "Change a FAQ for the server."
  (interactive)
  (lyskom-change-faq nil (lyskom-get-aux-item (server-info->aux-item-list
                                               (blocking-do 'get-server-info))
                                              14)))

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(def-kom-command kom-change-conf-faq ()
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  "Change a FAQ fo a conference."
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  (interactive)
  (let* ((conf-no (lyskom-read-conf-no
                   (lyskom-get-string 'what-to-change-faq-you)
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                   '(conf pers) 
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                   nil
                   (cons (if lyskom-current-conf
                             (let ((tmp (blocking-do 'get-uconf-stat lyskom-current-conf)))
                               (if tmp (uconf-stat->name tmp) ""))
                           "") 0)
                   t))
         (conf-stat (when conf-no       ; Need this to make sure the conf-stat is up-to-date!
                      (cache-del-conf-stat conf-no)
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