#!/bin/bash
#Autobackup script for mastodo.ru by leca@foxarmy.org

#The directory where all of backups are stored
backup_dir="/backups/"
#Directories or files to make a back up of
directories=("/home/mastodon" "/var/lib/redis/dump.rdb")
#Empty array for writing names of archives e.g. /home/mastodon -> mastodon.tar
names=()
#PostgreSQL databases to make a back up of
databases=("mastodon_production")
#Determining a unix time to create backup dir. in /backups
date=$(date +"%s")

#This program must be ran with root privileges because its sometimes reading sensetive information and have to has access to database
if [ $UID != "0" ]; then
	echo "You must run this script as root."
	exit 1;
fi


#Creating necessary directories
mkdir -p "${backup_dir}${date}"

#the main body of backup

#loop that takes every directory from an array and backing it up
for name in ${directories[@]}; do
	IFS="/"
	temp="${name}"
	read -rasplitIFS<<< "${temp}"
	len=${#splitIFS[@]}
	names+=(${splitIFS[$len-1]})
	IFS=''
done

#Loop that goes through names and backing them up
length=${#directories[@]}
i=0
while [ $i -lt $length ]; do
	tar cf "${backup_dir}${date}/${names[i]}.tar" ${directories[i]}
	i=$(( $i + 1 ))
done

#Loop that goes through databases and backing them up
for db in ${databases[@]}; do
	sudo -iu postgres pg_dump -Fc "${db}" > "${backup_dir}${date}/${db}.dump"
done

#Executing a script that manages backups
cd "${backup_dir}"
./backup_manager.sh

#NOTE: to restore a postgresql database from its dump file: pg_restore -d postgres --clean --create "backup.dump"