#!/bin/bash
DIALOG=Xdialog
BACKUP_SCRIPT=backup_script
BACKUP_TIME="2pm"
BACKUP_DAYS=1
SNOOZE_MINS=5


$DIALOG --display=:0.0 --wrap --title "Backup Reminder" \
		--ok-label Continue \
		--cancel-label Snooze \
		--yesno "You need to do a backup now.  Please attach \
		your external backup drive and click 'Continue' to continue \
		with the backup or 'Snooze' to postpone the backup for a few \
		minutes or close the window to skip this scheduled backup \
		and reschedule the backup for next time." 15 60 &> /dev/null

return_value=$?

# if the command succeeded (the user clicked continue)
# proceed with the backup
if [ $return_value = 0 ]; then 
	$BACKUP_SCRIPT
	success=$?

	# if the backup script succeeded then send mail to
	# the user and schedule the next backup
	if [ $success = 0 ]; then
		echo "backup succeeded. scheduling next backup for"
		echo $0 | at $BACKUP_TIME + $BACKUP_DAYS days
	# the backup script failed so stop the backup loop
	# and mail the user the failed message
	else
		echo "backup failed! stopping backup loop! please check your backup script and re-run this script!"
	fi
# the backup has been skipped (user closed the window)
# so reschedule the backup for the next scheduled time
elif [ $return_value = 255 ]; then
	echo "backup skipped. scheduling next backup for"
	echo $0 | at $BACKUP_TIME + $BACKUP_DAYS days
# either the dialog command failed because X wasn't available
# or the user snoozed the backup, so reschedule the backup
else
	echo $0 | at now + $SNOOZE_MINS minutes &> /dev/null
fi