#! /bin/bash
#  You need to execute this bash file on tmux, to have an easy way to see the output
# then, just execute the script and have a daily report of the status
#
#  Default ouput on $path/log.md can be readed by markdown and by a human
#
#  Maybe you'll need to do some modifications
# Autor: Teo Gonzalez Calzada @thblckjkr

# Global variables
path="/home/$USER/backup"                      # path destination of restores
dbAuthFile="/var/www/database.ini"             # ini file with credentials to open databases

# Get database ini passwords and user
username=$(awk -F "=" '/username/ {print $2}' $dbAuthFile  | tr -d ' ')
password=$(awk -F "=" '/password/ {print $2}' $dbAuthFile  | tr -d ' ')

# Get key to crypt
key=$(</var/www/decrypt_key)

# Define more things
enctype="-aes-256-cbc"      # encryption type for files
mysqldatabases="test test2" # Databases to create a restore on mysql
codepath="/var/www/html/"   # Path of code to restore

# Checks if the file exists, if not create a log
if [ ! -e  "$path/log.md" ] ; then
    printf "#Backup restore point#\n" > $path/log.md
    printf "Document log sucessfully started, system running"
fi

while :
do
    printf "###Starting restore###\n\n" >> $path/log.md
    printf "Starting restore point at `date`\n"

    # Variables declaration
    fDate=`date +%Y-%m-%d_%H-%M`            # Date formatted for today
	mysqldumpname="mysql_r$fDate.sql.gz"    # Final name of the mysql dump
    codedumpname="files_r$fDate.tar.gz"     # Final name of the code files restoration
	mongodumpname="mongo_r$fDate.tgz"       # Final name of the MongoDB dump

    ## MySQL ##
    #Create databases restore point
	a=`mysqldump -u $username -p$password --extended-insert --databases $mysqldatabases | gzip > $path/$mysqldumpname`
    b=`openssl enc $enctype -in $path/$mysqldumpname -out $path/$mysqldumpname.enc -k $key`
    #Add info to the log
	printf "GunZiped and encripted SQL Database with name **$mysqldumpname** at *`date`*\n\n" >> $path/log.md
    printf "> dump: $a \n" >> $path/log.md
    printf "> crypt: $b \n" >> $path/log.md

    rm -rf $path/$mysqldumpname #remove unencrypted
    ## MySQL ##

    ## MongoDB ##
    #Create a MongoDB restoration
    g=`mongodump --out $path/mongo`
    h=`sudo tar -zcf $path/$mongodumpname $path/mongo`
    i=`openssl enc $enctype -in $path/$mongodumpname -out $path/$mongodumpname.enc -k $key`
    #Add the info to the log
    printf "GunZiped and encripted Mongo database with name **$codedumpname** at *`date`*\n\n" >> $path/log.md
    printf "> mongo: $g \n" >> $path/log.md
    printf "> tar: $h \n" >> $path/log.md
    printf "> crypt: $h \n" >> $path/log.md

    rm -rf $path/mongo
    rm -rf $path/$mongodumpname
    ## MongoDB ##

    ## CODE ##
    #Create a code restoration
    d=`sudo tar -zcf $path/$codedumpname $codepath --exclude=''`
    e=`openssl enc $enctype -in $path/$codedumpname -out $path/$codedumpname.enc -k $key`
    #Add the info to the log
    printf "GunZiped and encripted Code files with name **$codedumpname** at *`date`*\n\n" >> $path/log.md
    printf "> tar: $d \n" >> $path/log.md
    printf "> crypt: $e \n" >> $path/log.md

    rm -rf $path/$codedumpname
    ## CODE ##

    ## CLEAN ##
    # Delete code restorations older than 15 days
    find $path -name "*.tar.gz.enc" -mtime +15 -exec rm -rf {} \;

    # Delete mysql from 30 days of more
    find $path -name "*.sql.gz.enc" -mtime +30 -exec rm -rf {} \;

    # Delete mongodb of 30 days or older
    find $path -name "*.tgz.enc" -mtime +30 -exec rm -rf {} \;

    printf "> Removed unencripted files \n\n" >> $path/log.md
    ## CLEAN ##

    ## RE-RUN ##
    # Wait's 1/2 day to run again
    printf " *Restoration point end at `date`*\n\n --- \n\n" >> $path/log.md
    printf "Restoration process ended, sleeping for one day\n"
	sleep 12h
done