#!/usr/bin/env bash
#
# Tar directory files
# 

CONF=$1
CURR_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
BOOTSTRAP=${CURR_DIR}/bootstrap.sh

## Check for perl regex support in grep
echo 'test' | grep -P 'test' > /dev/null 2>&1
if [ $? != 0 ]; then
	echo "EXITING: your distribution of grep binary doesn't support -P"
	exit 1
fi

if [ ! -e ${BOOTSTRAP} ];then 
	echo 'EXITING: boostrap.sh must be in the same directory as this script'
	exit 1
fi
source ${BOOTSTRAP}

if [ -z "${CONF}" ] || [ ! -e ${CONF} ];then 
	echo 'EXITING: missing configuration file'
	exit 1
fi
source ${CONF}

## Check if we exceeded number of back up files
FILES=$(ls -r ${BACKUP_DEST})
i=0
RM=''
for f in $FILES
do
	FILE=$(echo $f | grep -P "(${B_PREFIX}\..*\.tgz)$")
	if [ -n "${FILE}" ]; then
		FILE=${BACKUP_DEST}/${FILE}
		((i++))

		if [ $i -gt ${NUM_BACKUPS} ]; then
			if [ -z "${RM}" ]; then
				RM="rm -f ${FILE}"
			else
				RM="${RM} ${FILE}"
			fi
		fi
	fi
done

if [ -n "${RM}" ]; then
	echo 'CRON: Removing old backups..'
	debug "Executing: ${RM}"
	${RM}
else 
	echo 'CRON: Did not remove any old backups this run...'
fi

## Run backup
echo "CRON: Backing up files now..."
BASENAME=$(basename ${BACKUP_DIR})
cd ${BACKUP_DIR}
cd ..

### Debug
debug "Current directory: "`pwd`

tar -czf ${BACKUP_DEST}/${B_PREFIX}.`date +%m-%d-%Y`.tgz ${BASENAME} >> ${LOG} 2>&1

if [ $? != 0 ]; then
	echo "CRON: Failed to backup files"
 	send_notification "CRON: Unable to backup directory on ${HOSTNAME}" "DATE: {$TODAY}\n\nUnable to backup directory: ${BACKUP_DIR}"
	exit 1
else
	echo "CRON: Successfully backed up files"
	send_notification "CRON: Successfully backed up directory on ${HOSTNAME}" "DATE: $TODAY\n\n Successfully backed up directory: ${BACKUP_DIR}"
	exit 0
fi