#!/bin/bash
BACKUPFILES="/home/root/backup/backup_files.sh"
BACKUPMYSQL="/home/root/backup/backup_mysql.sh"
BACKUPFILESDIR="/home/backup/files"
BACKUPMYSQLDIR="/home/backup/mysql"
WORKDIR="/home/backup/ftp_backup"
MYDATE="$(date +%Y%m%d)"

LFTPSCRIPT="$WORKDIR/$MYDATE.lftp"
FTPUSER="ksXXXXX.ovh.com"
FTPPASSWD="PASSWORD"
FTPSERVER="ftp-server"

HISTORIC="$(dirname $0)/$(basename $0 .sh).historic"
let MAXBACKUPS=20


check_dirs()
{
        if ! [ -d $WORKDIR ]
        then
                mkdir -p $WORKDIR/$MYDATE
        else
                if [ -d $WORKDIR/$MYDATE ]
                then
                        rm -fr $WORKDIR/$MYDATE
                fi
                mkdir -p $WORKDIR/$MYDATE
        fi
}


do_backups()
{
        $BACKUPFILES
        $BACKUPMYSQL

        find $BACKUPFILESDIR -type f -name "*$MYDATE*" -exec cp -fv {} $WORKDIR/$MYDATE/ \;
        find $BACKUPMYSQLDIR -type f -name "*$MYDATE*" -exec cp -fv {} $WORKDIR/$MYDATE/ \;
}



upload_backup()
{
        echo "set dns:cache-enable off" > $LFTPSCRIPT
        echo "open -p 21 $FTPSERVER" >> $LFTPSCRIPT
        echo "user $FTPUSER $FTPPASSWD" >> $LFTPSCRIPT
        echo "lcd $WORKDIR" >> $LFTPSCRIPT
        echo "mirror -Rc $MYDATE" >> $LFTPSCRIPT

        lftp -f $LFTPSCRIPT
        rm -fr $WORKDIR/$MYDATE
        echo $MYDATE >> $HISTORIC
}

purge_backup()
{
        let LINES=$(cat $HISTORIC | wc -l)
        let HEAD=0
        if [ $LINES -gt $MAXBACKUPS ]
        then
                echo "COMPROBAR PURGADO BACKUP FTP" | mail -s "comprobacion" YOUR_MAIL@DOMAIN.com
                let HEAD=$LINES-$MAXBACKUPS
                echo "set dns:cache-enable off" > $LFTPSCRIPT
                echo "open -p 21 $FTPSERVER" >> $LFTPSCRIPT
                echo "user $FTPUSER $FTPPASSWD" >> $LFTPSCRIPT

                for i in $(head -$HEAD $HISTORIC)
                do
                        echo "rm -fr $i" >> $LFTPSCRIPT
                done

                lftp -f $LFTPSCRIPT
        fi
}

check_dirs
do_backups
upload_backup
purge_backup