basic pomodoro clock, requires wmctrl and zenity

pomodoro.sh

#!/bin/bash
#
# vim: ts=3:sw=3:et
#
# Pomodoro - Basic Pomodoro Clock
#    Copyright 2022 Lelanthran Manickum
#
#       Redistribution and use in source and binary forms, with or without
#    modification, are permitted provided that the following conditions are
#    met:
#
#       Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
#
#       Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
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#
#       Neither the name of the copyright holder nor the names of its
#    contributors may be used to endorse or promote products derived from this
#    software without specific prior written permission.
#
#    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
#    IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
#    THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
#    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
#    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
#    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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#
#

function die () {
   echo "$@"
   exit 127
}

[ -z "`which zenity`" ] && die "Zenity not installed in path"

export MYMINUTES=$1
if [ -z "$MYMINUTES" ]; then
   export MYMINUTES="
      `zenity   --entry \
            --title='Pomodoro' \
            --text='Enter number of minutes' \
            --entry-text='25'`"
   export MYMINUTES=`echo $MYMINUTES | grep -E "[0-9]"`
   [ -z "$MYMINUTES" ] && die "User cancelled action"
fi

export TOTALSECONDS=$(($MYMINUTES * 60))
export MYSECONDS=$(($MYMINUTES * 60))
export PROGRESS=0;
export STICKY=0
export TITLE="Pomodoro: $TOTALSECONDS second timeout"

export EXPIRES_AT=$((`date +"%s"` + $TOTALSECONDS))
export EXPIRES_AT=`date -d "@$EXPIRES_AT" +"%R; %B-%d, %Y"`

while [ $MYSECONDS -ge 0 ]; do
   if [ $PROGRESS -ge 1 ]; then
      wmctrl -r "$TITLE"  -b add,above
      wmctrl -r "$TITLE" -t -1
   fi
   echo $PROGRESS
   echo '# ' $MYSECONDS 'secs until ' $EXPIRES_AT
   export MYSECONDS=$(($MYSECONDS - 1))
   export PROGRESS=$(($TOTALSECONDS - $MYSECONDS))
   export PROGRESS=$(($PROGRESS * 100))
   export PROGRESS=$(($PROGRESS / $TOTALSECONDS))
   sleep 1
done | zenity  --progress\
               --width=400\
               --title="Pomodoro: $TOTALSECONDS second timeout"\
               --auto-close\
               --no-cancel

zenity   --warning\
         --width=400\
         --title="Pomodoro: $TOTALSECONDS second timeout"\
         --text="Pomodoro $TOTALSECONDS Expired" &

sleep 1

zenity   --notification\
         --title="Pomodoro: $TOTALSECONDS second timeout"\
         --text="Pomodoro $TOTALSECONDS Expired"

wmctrl -a "Pomodoro: $TOTALSECONDS second timeout"