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# ----------------------------------------------------------------------
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# PURPOSE: Electrical outlet supplying power for Appliances.
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#
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# AUTHOR: Michael J. McLennan Phone: (610)712-2842
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# AT&T Bell Laboratories E-mail: michael.mclennan@att.com
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#
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# RCS: $Id: Outlet.tcl,v 1.1.1.1 2002-01-16 10:24:47 markom Exp $
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# ----------------------------------------------------------------------
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# Copyright (c) 1993 AT&T Bell Laboratories
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# ======================================================================
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# Permission to use, copy, modify, and distribute this software and its
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# documentation for any purpose and without fee is hereby granted,
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# provided that the above copyright notice appear in all copies and that
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# both that the copyright notice and warranty disclaimer appear in
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# supporting documentation, and that the names of AT&T Bell Laboratories
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# any of their entities not be used in advertising or publicity
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# pertaining to distribution of the software without specific, written
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# prior permission.
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#
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# AT&T disclaims all warranties with regard to this software, including
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# all implied warranties of merchantability and fitness. In no event
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# shall AT&T be liable for any special, indirect or consequential
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# damages or any damages whatsoever resulting from loss of use, data or
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# profits, whether in an action of contract, negligence or other
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# tortuous action, arising out of or in connection with the use or
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# performance of this software.
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# ======================================================================
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itcl_class Outlet {
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constructor {config} {}
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method config {config} {}
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destructor {
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if {$usage > 0} bill
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}
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method use {power} {
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set usage [expr $usage+$power]
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}
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method sendBill {} {
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if {[catch "open /tmp/bill w" fout] != 0} {
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error "cannot create bill in /tmp"
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} else {
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set amount [format "$%.2f" [expr $usage*$rate]]
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puts $fout "----------------------------------------"
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puts $fout "/////////// MEGA-POWER, INC. ///////////"
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puts $fout "----------------------------------------"
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puts $fout " Customer: $owner"
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puts $fout " Outlet: $this"
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puts $fout " Usage: $usage kilowatt-hours"
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puts $fout " "
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puts $fout " Amount Due: $amount"
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puts $fout "----------------------------------------"
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close $fout
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exec mail $owner < /tmp/bill
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set usage 0
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}
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}
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proc bill {{customer *}} {
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foreach outlet [itcl_info objects -class Outlet] {
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set owner [$outlet info public owner -value]
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if {[string match $customer $owner]} {
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$outlet sendBill
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}
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}
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}
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proc rate {{newval ""}} {
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if {$newval == ""} {
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return $rate
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}
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set rate $newval
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}
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public owner {}
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protected usage 0
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common rate 0.05
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}
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