Pomodoro for xmobar with libnotify notifications

pomodoro

#!/bin/bash

pomodoro_file=$HOME/.pomodoro
default_pomodoro_time=1500
pomodoro_time=$default_pomodoro_time
default_rest_time=300
rest_time=$default_rest_time

notify_cmd="notify-send --icon=$HOME/local/share/icons/pomodoro.png Pomodoro"

cmd=$1

start_rest() {
  local modt=$(stat -c %Y $pomodoro_file)
  local now=$(date +%s)
  local end_rest=$(expr $modt + $rest_time)
  while  [ -f $pomodoro_file -a $(stat -c %Y $pomodoro_file) -eq $modt -a $now -lt $end_rest ]
  do
    local left=$(expr $end_rest - $now)
    echo -e "Break for `date -d @$left +%M:%S`"
    sleep 1
    now=$(date +%s)
  done

  if [ -e $pomodoro_file -a $(stat -c %Y $pomodoro_file) -eq $modt ]
  then
    $notify_cmd "Break is over. Get back to work for 25 minutes!"
    start_wait "pomodoro"
  else
    start_wait
  fi
}

start_pomodoro() {
  local modt=$(stat -c %Y $pomodoro_file)
  local diff=`expr $(date +%s) - $modt`
  local left=$(expr $pomodoro_time - $diff)

  while  [ -f $pomodoro_file -a $(stat -c %Y $pomodoro_file) -eq $modt -a $left -gt 0 ]
  do
    diff=`expr $(date +%s) - $modt`
    left=$(expr $pomodoro_time - $diff)
    local i=$(expr $diff / 60)
    local rest=$(expr $left / 60)
    echo -en "["
    while [ $i -gt 0 ]
    do
      echo -n "#"
      i=$(expr $i - 1)
    done

    while [ $rest -gt 0 ]
    do
      echo -n "-"
      rest=$(expr $rest - 1)
    done

    echo "] `date -d @$left +%M:%S`"
    sleep 1
  done

  if [ -e $pomodoro_file -a $(stat -c %Y $pomodoro_file) -eq $modt ]
  then
    $notify_cmd "Take a 5 minute break"
    start_wait "rest"
  else
    start_wait
  fi
}

start_wait() {
  if [ $# -gt 0 -a -e $pomodoro_file ]
  then
    case $1 in
      "pomodoro")
        echo "pomodoro $pomodoro_time" > $pomodoro_file
        ;;
      "rest")
        echo "rest $rest_time" > $pomodoro_file
    esac
  fi


  while [ ! -e $pomodoro_file ]
  do
    echo "Pomodoro Off"
    sleep 1
  done

  IFS=" "
  read cmd t < $pomodoro_file
  case $cmd in
    "pomodoro")
      pomodoro_time=$t
      start_pomodoro
      ;;
    "rest")
      rest_time=$t
      start_rest
      ;;
  esac
}

case $cmd in
  "restart")
    rm -f $pomodoro_file
    echo "pomodoro" > $pomodoro_file
    ;;
  "start")
    rm -f $pomodoro_file
    pomodoro_time=${2:-$default_pomodoro_time}
    echo "pomodoro $pomodoro_time" > $pomodoro_file
    ;;
  "rest")
    rm -f $pomodoro_file
    rest_time=${2:-$default_rest_time}
    echo "rest $rest_time" > $pomodoro_file
    ;;
  "stop")
    rm -f $pomodoro_file
    ;;
  *)
    start_wait
    ;;
esac