#!/bin/bash

BACKUP_LOC="/mnt/backup"
EXCLUDE_FILE="/root/scripts/backup/exclude"

month="`date '+%B'`"
nextmonth="` date --date '1 month' '+%B' `"
lastmonth="` date --date '1 month ago' '+%B' `"
lastyear="` date --date '1 year ago' '+%Y' `"
today="`date '+%d'`"
yesterday="`date --date '1 day ago' '+%d'`"

if [ -n "$1" ]
then
	BACKUP_LOC="$1"
fi

#If next month exists, then its from a year ago, so append the year onto next month.
if [ -e "$BACKUP_LOC/$nextmonth" ]
then
        mv $BACKUP_LOC/$nextmonth $BACKUP_LOC/$nextmonth.$lastyear
fi

#If last month of last year exists, then delete it.
if [ -e "$BACKUP_LOC/$lastmonth.$lastyear" ]
then
        rm -Rf $BACKUP_LOC/$lastmonth.$lastyear
fi


#Create folder structure if it doesn't exist
if [ ! -e "$BACKUP_LOC/$month" ]
then
	mkdir $BACKUP_LOC/$month
fi

if [ ! -e "$BACKUP_LOC/$month/$today" ]
then
        mkdir $BACKUP_LOC/$month/$today
fi

#Finally the backup
cp -avlf $BACKUP_LOC/$month/$yesterday/. $BACKUP_LOC/$month/$today
/usr/bin/rsync -av --ignore-errors --delete --exclude-from=$EXCLUDE_FILE /home $BACKUP_LOC/$month/$today/
/usr/bin/rsync -av --ignore-errors --delete --exclude-from=$EXCLUDE_FILE /data $BACKUP_LOC/$month/$today/
/usr/bin/rsync -av --ignore-errors --delete --exclude-from=$EXCLUDE_FILE /etc $BACKUP_LOC/$month/$today/
/usr/bin/rsync -av --ignore-errors --delete --exclude-from=$EXCLUDE_FILE /var/www $BACKUP_LOC/$month/$today/