#!/bin/bash

[ $# -ne 5 ] && exit 6

DBHOST=${1}
DBUSER=${2}
DBPASS=${3}
DATABASE=${4}
BACKUP_DIR=${5}

MDUMP=`which mongodump`

[ -z "${MDUMP}" ] && exit 200
[ -z "${BACKUP_DIR}" -o "${BACKUP_DIR}" == "/" ] && exit 200

[ -e "${BACKUP_DIR}/${DATABASE}" ] && rm -rf "${BACKUP_DIR}/${DATABASE}"
[ ! -e "${BACKUP_DIR}/${DATABASE}" ] && mkdir -p "${BACKUP_DIR}/${DATABASE}" >/dev/null

HOST=
[ -n "${DBHOST}" ] && HOST="-h ${DBHOST}"
USER=
[ -n "${DBUSER}" ] && USER="-u ${DBUSER}"
PASS=
[ -n "${DBPASS}" ] && PASS="-p ${DBPASS}"
DB=
[ -n "${DATABASE}" -a "${DATABASE}" != "all" ] && DB="-d ${DATABASE}"

$MDUMP ${HOST} ${USER} ${PASS} ${DB} -o "${BACKUP_DIR}/${DATABASE}" >/dev/null

[ $? -ne 0 ] && exit 100

tar -czf "${BACKUP_DIR}-${DATABASE}.tgz" "${BACKUP_DIR}/${DATABASE}" >/dev/null 2>&1
ret=$?
rm -rf "${BACKUP_DIR}" >/dev/null

exit ${ret}