#!/bin/bash
##Zmienne
script_name="TS-Backup" #Zmienna używana przy logowaniu
z_file="/root/serwer/ts3server.sqlitedb" #plik lub folder do backupu
z_backup_folder="/root/serwer/backup" #folder w którym trzymamy backup, musi byc utworzony wczesniej
z_archive_backup=5 #ile archiwalnych plików wstecz trzymamy

#Zmienne funkcyjne - nie ruszaj!!
z_date=`date +%Y%m%d`

#0-wylacz log | 1-wlacz log

check_backup_directory () {
    if [ ! -d "$z_backup_folder" ]; then
        echo "Backup folder "$z_backup_folder" doesn't exist"
        logger "$script_name - [fail] backup folder "$z_backup_folder" doesn't exist"
        exit 1
    fi
}

delete_oldest_file () {
    oldest_file=$(find "$z_backup_folder"/* -type d -printf "%p\n" | sort -n | head -n1)
    rm -Rf $oldest_file
    logger "$script_name - $oldest_file was removed"
}

backup_file_count () {
    backup_file_count=$(ls -1 $z_backup_folder | wc -l)
}

delete_old_archive () {
    backup_file_count
    while [ $backup_file_count -gt $z_archive_backup ]; do
        delete_oldest_file
        backup_file_count
    done
}
make_backup () {
    mkdir "$z_backup_folder"/"$z_date" &> /dev/null
    rsync -avh --checksum $z_file "$z_backup_folder"/"$z_date"/ &> /dev/null
    logger "$script_name - making backup $z_date"
}
main () {
    echo "Rozpoczynam backup"
    logger "$script_name - [start]  backup"
    check_backup_directory
    make_backup
    delete_old_archive
    logger "$script_name [done] backup"
}

main