#!/bin/bash

CHECK_LINK=http://nsu.ru/education/schedule/Html_GK/MMF.htm
SAVE_TO=/home/likhter/nsu_sched/temp
EMAIL_LIST=/home/likhter/nsu_sched/email_list

JUST_CHECKED=`date --utc --date "$(HEAD $CHECK_LINK | grep ^Last-Modified | sed 's/Last-Modified: //')" +%s`

if [ $JUST_CHECKED -gt $(cat $SAVE_TO) ]; then
	echo $JUST_CHECKED > $SAVE_TO
	for ADDR in $(cat $EMAIL_LIST); do
		echo -e "Just check it out at $CHECK_LINK\n\n." | mail -s "NSU schedule has been updated" $ADDR
	done
fi