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;;;;; -*-coding: raw-text;-*-
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;;;;;
;;;;; $Id$
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;;;;; Copyright (C) 1991, 1996  Lysator Academic Computer Association.
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;;;;;
;;;;; This file is part of the LysKOM server.
;;;;; 
;;;;; 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-arg)
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  "Delete a text. Argument: TEXT-NO"
  (interactive "P")
  (let ((text-no (cond ((null text-no-arg) 0)
		       ((integerp text-no-arg) text-no-arg)
		       ((listp text-no-arg) (car text-no-arg))
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		       (t 0)))
        (do-delete t))

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    (if (zerop text-no)
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	(setq text-no 
	      (lyskom-read-number (lyskom-get-string 'what-text-to-delete)
				  lyskom-current-text)))
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    (let* ((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)
				  (if (= num-marks 2)
				      (lyskom-get-string 
				       'marked-by-you-and-one)
				    (lyskom-format 'delete-marked-by-you-and-several
						   (1- num-marks))))
			      (if (= num-marks 1)
				  (lyskom-get-string 'delete-marked-by-one)
				(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))
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          (when is-marked-by-me
            (lyskom-unmark-text text-no nil)))))))
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;;; ================================================================
;;;        ]terse presentation - Review the presentation
;;;               for a person or a conference

;;; Author: Inge Wallin


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(defun kom-review-presentation (&optional who)
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  "Review the presentation for a person or a conference."
  (interactive)
  (lyskom-start-of-command 'kom-review-presentation)
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  (let ((end-of-command-taken-care-of))
    (unwind-protect
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        (let ((conf-stat 
               (if who
                   (blocking-do 'get-conf-stat who)
                 (lyskom-read-conf-stat 
                          (lyskom-get-string 'presentation-for-whom)
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                          '(all)
                          nil "" t))))
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          (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
                                    conf-stat))))
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      (if end-of-command-taken-care-of
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          nil
        (lyskom-end-of-command)))))
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;;; ================================================================
;;;          ]terse det kommenterade - View commented text

;;; Author: Inge Wallin
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;;; Modified by: David K}gedal
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(def-kom-command kom-view-commented-text ()
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  "View the commented text.
If the current text is comment to (footnote to) several text then the first
text is shown and a REVIEW list is built to shown the other ones."
  (interactive)
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  (if lyskom-current-text
      (progn
	(lyskom-tell-internat 'kom-tell-read)
	(lyskom-view-commented-text
	 (blocking-do 'get-text-stat lyskom-current-text)))
    (lyskom-insert-string 'have-to-read)))
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(def-kom-command kom-view-previous-commented-text ()
 "View the text the previous text commented.
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."
	      (interactive)
	      (if lyskom-previous-text
		  (progn
		    (lyskom-tell-internat 'kom-tell-read)
		    (lyskom-view-commented-text
		     (blocking-do 'get-text-stat lyskom-previous-text)))
		(lyskom-insert-string 'confusion-what-to-view)))

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(defun lyskom-view-commented-text (text-stat)
  "Handles the return from the initiate-get-text-stat, displays and builds list."
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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
                                   'FOOTN-TO misc-info-list))))
         (text-nos (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))))
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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
                'REVIEW nil (lyskom-get-current-priority)
                (lyskom-create-text-list (cdr text-nos))
                lyskom-current-text)
               lyskom-reading-list t))
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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"
  (cond ((null list) nil)
	((equal type (misc-info->type (car list))) 
	 (cons (car list)
	       (lyskom-misc-infos-from-list type (cdr list))))
	(t (lyskom-misc-infos-from-list type (cdr list)))))


;;; ================================================================
;;;                         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 "Quitting in letter"))))
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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)
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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)
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                    '(all) nil "" t)))
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        (who (blocking-do 'get-conf-stat lyskom-pers-no))
        (pers-stat (blocking-do 'get-pers-stat lyskom-pers-no)))
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    (lyskom-add-member-answer (lyskom-try-add-member whereto who pers-stat nil)
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                              whereto 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)))
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      (lyskom-add-member-answer result whereto who)
      (if thendo
          (apply thendo data))
      result)))
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(defun lyskom-try-add-member (conf-conf-stat pers-conf-stat 
                                             pers-stat membership-type)
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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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Returns t if it was possible, otherwise nil."
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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))
	       100			; When adding someone else
	     (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
	       (lyskom-read-num-range
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		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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      (when (null membership-type)
        (setq membership-type 
              (lyskom-create-membership-type nil nil nil nil
                                             nil nil nil nil)))

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      (if (= (conf-stat->conf-no pers-conf-stat)
	     lyskom-pers-no)
	  (lyskom-format-insert 'member-in-conf
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				conf-conf-stat)
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	(lyskom-format-insert 'add-member-in
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			      pers-conf-stat
			      conf-conf-stat))
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      (lyskom-ignoring-async (18 lyskom-pers-no
                                 (conf-stat->conf-no conf-conf-stat))
        (blocking-do 'add-member 
                     (conf-stat->conf-no conf-conf-stat)
                     (conf-stat->conf-no pers-conf-stat)
                     priority where
                     membership-type)))))
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(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."
  (if (null answer)
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      (progn
	(lyskom-insert-string 'nope)
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	(if (conf-type->rd_prot (conf-stat->conf-type conf-conf-stat))
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	    ;; The conference is protected. Tell the user to contact
	    (let ((supervisorconf (blocking-do
				   'get-conf-stat
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				   (conf-stat->supervisor conf-conf-stat))))
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	      (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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	  (lyskom-format-insert 'error-code
				(lyskom-get-error-text lyskom-errno)
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				lyskom-errno)))
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    (lyskom-insert-string 'done)
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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))
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    (if (= (conf-stat->conf-no pers-conf-stat)
	   lyskom-pers-no)
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	(progn				; Adding myself
	  (lyskom-add-membership
	   (blocking-do 'query-read-texts
			lyskom-pers-no 
			(conf-stat->conf-no conf-conf-stat))
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	   (conf-stat->conf-no conf-conf-stat))))))
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(defun lyskom-add-membership (membership conf-no)
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  "Adds MEMBERSHIP to the sorted list of memberships.
Args: MEMBERSHIP CONF-STAT THENDO DATA
Also adds to lyskom-to-do-list."
  (if membership
      (progn
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	(lyskom-insert-membership membership lyskom-membership)
	(lyskom-prefetch-map conf-no
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			     membership)
        (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 
                                   (if (or (zerop lyskom-current-conf))
                                       ""
                                     (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."
  (let ((reply nil)
	(self (= (conf-stat->conf-no pers) lyskom-pers-no)))
    (cond ((null pers) (lyskom-insert-string 'error-fetching-person))
	  ((null conf) (lyskom-insert-string 'error-fetching-conf))
	  (t
	   (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)
					 lyskom-membership))
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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))
				     (conf-stat->name conf))
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	     (lyskom-insert-string 'done)
	     (if (and self
		      (= (conf-stat->conf-no conf)
			 lyskom-current-conf))
		 (progn 
		   (set-read-list-empty lyskom-reading-list)
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                   (lyskom-run-hook-with-args 'lyskom-change-conf-hook
                                              lyskom-current-conf 0)
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		   (setq lyskom-current-conf 0)))
	     (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) t))
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	 (secret (if (not open)
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		     (j-or-n-p (lyskom-get-string 'secret-conf) t)))
	 (orig (j-or-n-p (lyskom-get-string 'comments-allowed) t))
         (anarchy (j-or-n-p (lyskom-get-string 'anonymous-allowed) t))
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         (secmem (and (lyskom-have-feature long-conf-types)
                      (not (lyskom-j-or-n-p (lyskom-get-string 'secret-members-allowed) t))))
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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)
	  (lyskom-format-insert 'error-code
				(lyskom-get-error-text lyskom-errno)
				lyskom-errno))
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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: ???


(defun kom-write-comment (&optional text-no)
  "Write a comment to a text.
If optional arg TEXT-NO is present write a comment to that text instead."
  (interactive (list 
		(cond
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		 ((null current-prefix-arg) lyskom-current-text)
		 ((integerp current-prefix-arg) current-prefix-arg)
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		 ((listp current-prefix-arg) 
		  (lyskom-read-number (lyskom-get-string 'what-comment-no)))
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		 (t (signal 'lyskom-internal-error '(kom-write-comment))))))
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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)
              (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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    (lyskom-end-of-command)))


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(def-kom-command kom-write-footnote (&optional 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)
  (let ((text-stat nil))
    (setq text-no
          (cond ((and (null current-prefix-arg)
                      lyskom-current-text
                      (setq text-stat
                            (blocking-do 'get-text-stat lyskom-current-text))
                      (eq (text-stat->author text-stat) lyskom-pers-no))
                 (setq text-no lyskom-current-text))
                
                ((and (null current-prefix-arg)
                      lyskom-last-written
                      (setq text-stat
                            (blocking-do 'get-text-stat lyskom-last-written)))
                 (lyskom-read-number (lyskom-get-string 'what-footnote-no)
                                     lyskom-last-written))

                ((integerp current-prefix-arg) 
                 current-prefix-arg)
                
                ((listp current-prefix-arg)
                 (lyskom-read-number (lyskom-get-string 'what-footnote-no)))

                (t (signal 'lyskom-internal-error '(kom-write-footnote)))))

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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 ()
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  "Write a comment to previously viewed text."
  (interactive)
  (if lyskom-previous-text
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      (blocking-do-multiple ((text-stat (get-text-stat lyskom-previous-text))
                             (text (get-text lyskom-previous-text)))
        (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
               lyskom-previous-text)
              (lyskom-write-comment-soon
               text-stat
               text
               lyskom-previous-text
               '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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  (cond
   ;; Text not found?
   ((or (null text-stat)
	(null text))
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    (lyskom-format-insert 'cant-read-textno text-no))
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   ;; Give header.
   ((string-match "\n" (text->text-mass text))
    (lyskom-write-comment text-stat
			  (substring (text->text-mass text)
				     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))
        (lyskom-comment-recipients data lyskom-proc text-stat
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                                   subject type ccrep 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
	    (let ((conf-stat (car data)))
	      (if (memq (conf-stat->comm-conf conf-stat) recpts)
		  nil
		(setq recver
		      (append recver
			      (list
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			       (cons (cond
                                      ((memq (conf-stat->conf-no conf-stat) 
                                             ccrep) 'cc-recpt)
                                      ((memq (conf-stat->conf-no conf-stat)
                                             bccrep) 'bcc-recpt)
                                      (t 'recpt))
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				     (conf-stat->comm-conf conf-stat)))))
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		(if (lyskom-get-membership (conf-stat->conf-no conf-stat))
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		    (setq member t))
		(setq recpts (cons (conf-stat->comm-conf conf-stat) recpts))))
	    (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 "quit in lyskom-comment-recipients"))))
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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 (&optional 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."
  (interactive (list
		(cond
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		 ((null current-prefix-arg) lyskom-current-text)
		 ((integerp current-prefix-arg) current-prefix-arg)
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		 ((listp current-prefix-arg) 
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                  (lyskom-read-number (lyskom-get-string 'what-private-no)))
		 (t (signal 'lyskom-internal-error '(kom-private-answer))))))
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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)
      (if (string-match "\n" (text->text-mass text))
	  (lyskom-private-answer text-stat
				 (substring (text->text-mass text)
					    0 (match-beginning 0)))
	(lyskom-private-answer text-stat ""))
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    (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."
  (if (null text-stat)
      (progn
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	(lyskom-insert-string 'confusion-what-to-answer-to))
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    (progn
      (lyskom-tell-internat 'kom-tell-write-reply)
      (lyskom-edit-text lyskom-proc
			(lyskom-create-misc-list
			 'comm-to (text-stat->text-no text-stat)
			 'recpt (text-stat->author text-stat)
			 '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 ()
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  "Write a private answer to previously viewed text."
  (interactive)
  (if lyskom-previous-text
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      (blocking-do-multiple ((text-stat (get-text-stat lyskom-previous-text))
                             (text (get-text lyskom-previous-text)))
        (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 lyskom-previous-text)))
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    (lyskom-insert-string 'confusion-who-to-reply-to)))
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(defun lyskom-private-answer-soon-prev (text-stat text)
  "Write a private answer to TEXT-STAT, TEXT."
  (if (string-match "\n" (text->text-mass text))
      (lyskom-private-answer text-stat
			     (substring (text->text-mass text)
					0 (match-beginning 0)))
    (lyskom-private-answer text-stat "")))


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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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    (setq lyskom-sessions-with-unread
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	  (delq lyskom-buffer lyskom-sessions-with-unread))
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    (setq lyskom-sessions-with-unread-letters
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	  (delq lyskom-buffer lyskom-sessions-with-unread-letters))
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    (set-process-sentinel lyskom-proc nil)
    (delete-process lyskom-proc)
    (lyskom-insert-string '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-conf-motd ()
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  "Change motd 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 'who-to-put-motd-for)
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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))
   'motd))
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(defun lyskom-get-recipients-from-misc-list (misc-list)
  "Return a misc-info-list containing only the recipients."
  (let* ((info (car misc-list))
	 (type (misc-info->type info)))
    (cond ((null misc-list) '())
	  ((or (eq type 'RECPT)
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	       (eq type 'CC-RECPT)
               (eq type 'BCC-RECPT))
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	   (append (list (intern (downcase (symbol-name type)))
			 (misc-info->recipient-no info))
		   (lyskom-get-recipients-from-misc-list
		    (cdr misc-list))))
	  (t
	   (lyskom-get-recipients-from-misc-list
	    (cdr misc-list))))))


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(defun lyskom-change-pres-or-motd-2 (conf-stat type)
  "Change the presentation or motd of CONF-STAT.
TYPE is either 'pres or 'motd, depending on what should be changed."
  (cond
   ((null conf-stat)			;+++ annan felhantering
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    (lyskom-insert-string 'cant-get-conf-stat))
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   ((or lyskom-is-administrator
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	(lyskom-get-membership (conf-stat->supervisor conf-stat))
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	(= lyskom-pers-no (conf-stat->conf-no conf-stat)))
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    (lyskom-dispatch-edit-text
     lyskom-proc
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     (apply
      'lyskom-create-misc-list
      (if (and (eq type 'pres)
	       (not (zerop (conf-stat->presentation conf-stat))))
	  (append
	   (lyskom-get-recipients-from-misc-list
	    (text-stat->misc-info-list
	     (blocking-do 'get-text-stat
			  (conf-stat->presentation conf-stat))))
	   (list 'comm-to
		 (conf-stat->presentation conf-stat)))
	(list 'recpt
	      (cond
	       ((eq type 'motd)
		(server-info->motd-conf lyskom-server-info))
	       ((eq type 'pres)
		(if (conf-type->letterbox
		     (conf-stat->conf-type conf-stat))
		    (server-info->pers-pres-conf 
		     lyskom-server-info)
		  (server-info->conf-pres-conf
		   lyskom-server-info)))))))
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     (conf-stat->name conf-stat)
     (let ((text-mass (blocking-do 'get-text 
				   (cond
				    ((eq type 'pres)
				     (conf-stat->presentation conf-stat))
				    ((eq type 'motd)
				     (conf-stat->msg-of-day conf-stat))))))
       (if (and text-mass
		(string-match "\n" (text->text-mass text-mass)))
	   (substring (text->text-mass text-mass) (match-end 0))
	 (if (and (eq type 'pres)
		  (conf-type->letterbox (conf-stat->conf-type conf-stat)))
	     (lyskom-get-string 'presentation-form)
	   "")))
     (cond
      ((eq type 'pres) 'lyskom-set-presentation)
      ((eq type 'motd) 'lyskom-set-conf-motd))
     (conf-stat->conf-no conf-stat)))
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   (t
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    (lyskom-format-insert 'not-supervisor-for
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			  conf-stat))))
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;;; ================================================================
;;;           Ta bort lapp p} d|rren - delete conf-motd

;;; Author: Linus Tolke (& Inge Wallin)


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(def-kom-command kom-unset-conf-motd ()
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  "Removes motd for a person or a conference."
  (interactive)
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  (let ((conf-stat (or (lyskom-read-conf-stat
			(lyskom-get-string 'who-to-remove-motd-for)
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			'(all) t nil t)
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		       (blocking-do 'get-conf-stat lyskom-pers-no))))
    (cond
     ((null conf-stat)
      (lyskom-insert-string 'cant-get-conf-stat))
     ((or lyskom-is-administrator
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	  (lyskom-get-membership (conf-stat->supervisor conf-stat)))
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      ;; This works like a dispatch. No error handling.
      (lyskom-set-conf-motd 0 (conf-stat->conf-no conf-stat)))
     (t
      (lyskom-format-insert 'not-supervisor-for
			    conf-stat)))))
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;;; ================================================================
;;;               G} till M|te - Go to a conference.

;;; Author: ???

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(def-kom-command kom-go-to-conf (&optional conf-no)
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  "Select a certain conference.
The user is prompted for the name of the conference.
If s/he was already reading a conference that conference will be put
back on lyskom-to-do-list."
  (interactive)
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  (let ((conf (if conf-no
                  (blocking-do 'get-conf-stat conf-no)
                (lyskom-read-conf-stat
                 (lyskom-get-string 'go-to-conf-p)
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                 '(all) nil "" t))))
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    (lyskom-go-to-conf conf)))


(defun lyskom-go-to-conf (conf)
  "Go to the conference in CONF. CONF can be conf-no of conf-stat.
Allowed conferences are conferences and the mailboxes you are 
member of."
  (if (numberp conf) (setq conf (blocking-do 'get-conf-stat conf)))
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  (let ((membership (lyskom-get-membership (conf-stat->conf-no conf))))
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    (lyskom-format-insert 'go-to-conf
			  conf)
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    ;; FIXME: DEBUG+++
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    (let ((lyskom-inhibit-prefetch t))

      (cond
       (membership
	(lyskom-do-go-to-conf conf membership))
       ((conf-type->letterbox (conf-stat->conf-type conf))
	(lyskom-format-insert 'cant-go-to-his-mailbox
			      conf))
       (t
	(progn
	  (lyskom-format-insert 'not-member-of-conf
				conf)
	  (lyskom-scroll)
	  (if (lyskom-j-or-n-p (lyskom-get-string 'want-become-member))
	      (if (lyskom-add-member-by-no (conf-stat->conf-no conf)
					   lyskom-pers-no)
		  (lyskom-do-go-to-conf conf
					(lyskom-get-membership
					 (conf-stat->conf-no conf)))
		(lyskom-insert-string 'nope))
	    (lyskom-insert-string 'no-ok))))))

    ;; DEBUG+++
    (lyskom-continue-prefetch)
    ))
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;; Dead function /davidk 960217
;;(defun lyskom-fixup-and-go-to-conf (conf-no)
;;  "Prefetches and after lyskom-member-in-conf and then goes to CONF-NO."
;;  (lyskom-do-go-to-conf (blocking-do 'get-conf-stat conf-no)
;;			(lyskom-member-p conf-no)))
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(defun lyskom-do-go-to-conf (conf-stat membership)
  "Go to a conference. Args: CONF-STAT MEMBERSHIP.
 Put a read-info of type CONF first on lyskom-reading-list.
Args: CONF-STAT MEMBERSHIP"
  (let ((priority (lyskom-get-current-priority)))
    (lyskom-maybe-move-unread nil)
    (if conf-stat
	(lyskom-set-mode-line conf-stat))
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    (let ((r 0)
	  (len (read-list-length lyskom-to-do-list)) 
	  (found nil))
      (while (and (not found)
		  (< r len))
	(if (and (read-info->conf-stat (read-list->nth lyskom-to-do-list r))
		 (= (conf-stat->conf-no conf-stat)
		    (conf-stat->conf-no 
		     (read-info->conf-stat 
		      (read-list->nth lyskom-to-do-list r)))))
	    (setq found t)
	  (++ r)))

      (cond (found
	     (let ((read-info (read-list->nth lyskom-to-do-list r)))
	       (read-list-enter-first read-info lyskom-reading-list)
	       (read-list-delete-read-info (conf-stat->conf-no conf-stat)
					   lyskom-to-do-list)
	       (read-list-enter-first read-info lyskom-to-do-list)
	       (set-read-info->priority read-info priority)
	       (lyskom-enter-conf conf-stat read-info)))
	    (t
	     (lyskom-go-to-empty-conf conf-stat))))))
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(defun lyskom-go-to-empty-conf (conf-stat)
  "Go to a conference with no unseen messages. Args: CONF-STAT."
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  (blocking-do 'pepsi (conf-stat->conf-no conf-stat))
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  (lyskom-run-hook-with-args 'lyskom-change-conf-hook 
                      lyskom-current-conf
                      (conf-stat->conf-no conf-stat))
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  (setq lyskom-current-conf (conf-stat->conf-no conf-stat))
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  (lyskom-format-insert 'conf-all-read 
			conf-stat))
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;;(def-kom-var kom-iåm-conf-no 6
;;  "*Conf-no of IÅM."
;;local)

;;(defun kom-change-to-iåm-hook (old new)
;;  (cond ((eq new kom-iåm-conf-no)
;;         (make-local-variable kom-iåm-saved-variables)
;;         (setq kom-iåm-saved-variables
;;               (list kom-check-commented-author-membership
;;                     kom-check-for-new-comments
;;                     kom-confirm-multiple-recipients))
;;         (setq kom-check-commented-author-membership nil
;;               kom-check-for-new-comments nil
;;               kom-confirm-multiple-recipients nil))
;;        (t (when kom-iåm-saved-variables
;;             (setq kom-check-commented-author-membership 
;;                   (elt kom-iåm-saved-variables 0)
;;                   kom-check-for-new-comments
;;                   (elt kom-iåm-saved-variables 1)
;;                   kom-confirm-multiple-recipients
;;                   (elt kom-iåm-saved-variables 2))))))

         

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(defun lyskom-get-current-priority ()
  "Return the current priority level."
  (or (read-info->priority (read-list->first 
			    lyskom-reading-list))
      (read-info->priority (read-list->first
			    lyskom-to-do-list))
      -1))


;;; ================================================================
;;;                 Skriva inl{gg - write text

;;; Author: ???


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(def-kom-command kom-write-text (&optional arg)
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  "write a text."
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  (interactive "P")
  (let ((recpt nil))
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    (cond ((consp arg) (setq recpt
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                         (lyskom-read-conf-no
                          (lyskom-get-string 'who-send-text-to)
                          '(all) nil nil t)))
          ((numberp arg) (setq recpt arg))
          (t (setq recpt lyskom-current-conf)))
    (if (zerop recpt)
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	(lyskom-insert-string 'no-in-conf)
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      (lyskom-tell-internat 'kom-tell-write-text)
      (lyskom-edit-text lyskom-proc
                        (lyskom-create-misc-list 'recpt
                                                 recpt)
                        "" ""))))
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;;; ================================================================
;;;                 Lista Personer - List persons

;;; Author: ceder
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;;; Rewritten: linus
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(def-kom-command kom-list-persons (match)
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  "List all persons whose name matches MATCH (a string)."