dir_data="/home/test/.fortcronjob/"

if [ $# != 2 ]
then
  echo "Usage: unique_id week_modulus"
  exit 1
fi

instance_id=$1
instance_mod=$2
counter=0
exit_value=1
file_data="$dir_data$1"

if [ ! -e "$file_data" ]
then
  echo "id:$instance_id - no data, starting from 0"
else
  source "$file_data"
fi

counter=$(( $counter % $instance_mod ))

if [ $counter == 0 ]
then
  echo "id:$instance_id - true"
  exit_value=0
else
  echo "id:$instance_id - t-$(( $instance_mod - $counter ))"
fi

counter=$(( $counter + 1 ))
echo "counter=$counter" > "$file_data"

exit $exit_value