#!/bin/bash
#                        _   _
#  _ __ ___   ___  _ __ | |_| |__  ___
# | '_ ` _ \ / _ \| '_ \| __| '_ \/ __|
# | | | | | | (_) | | | | |_| | | \__ \
# |_| |_| |_|\___/|_| |_|\__|_| |_|___/
#
# Navigates through month calendars and exits with q

month=$(date +%m)
year=$(date +%Y)
cal -m "$month" "$year"
read -rn 1 input

while [ "$input" != "q" ]
do
	case $input in
		l)
			clear
			month=$((month%12+1))
			if [ "$month" -eq 1 ]
			then
				year=$((year+1))
			fi
			;;
		h)
			clear
			month=$(($((month-1))%12))
			if [ "$month" -eq 0 ]
			then
				month=12
				year=$((year-1))
			fi
			;;
	esac
	clear
	cal -m "$month" "$year"
	read -rn 1 input
done