#!/bin/bash

DATE=$(date +%F)
TARGET_FILENAME=edgeos-backup-$DATE.tar.gz
TARGET_DIR=/tmp
TARGET_PATH=$TARGET_DIR/$TARGET_FILENAME
SOURCE_DIR=/config
DATE_OFFSET_SCRIPT=/config/user-data/date-offset.pl

BACKUP_RETENTION=3
FTP_USER=router
FTP_PASS=mypassword
FTP_HOST=backup.mydomain.local

function date-offset {
	$DATE_OFFSET_SCRIPT $1
}

function delete-older-remote-file {
	OLDER_DATE=$(date-offset $1)
	OLD_FILENAME=edgeos-backup-$OLDER_DATE.tar.gz

	echo "... Going to delete older file $OLD_FILENAME"
	ftp -n -z secure $FTP_HOST <<END_SCRIPT
quote USER $FTP_USER
quote PASS $FTP_PASS
quote PROT P
delete $OLD_FILENAME
quit
END_SCRIPT
}

echo "Backup /config..."
rm $TARGET_PATH 2> /dev/null
tar cfz $TARGET_PATH $SOURCE_DIR

echo "Uploading to FTP..."
ftp -n -z secure $FTP_HOST <<END_SCRIPT
quote USER $FTP_USER
quote PASS $FTP_PASS
quote PROT P
binary
put $TARGET_PATH $TARGET_FILENAME
quit
END_SCRIPT

echo "Clean up existing file..."
rm $TARGET_PATH

echo "Clean up older remote files..."
for i in $(seq $BACKUP_RETENTION $(($BACKUP_RETENTION + 3)));
	do delete-older-remote-file $i
done

exit 0