#!/bin/bash
#
# Backup Tool 2.0
#
# Programm von Netstack GbR written by Andreas Pfeiffer
#
# Dieses Programm wurde für Datenbank backups mehrerer Datenbanken vorgesehen!
# Ab Version 1.2 gibt es auch MYSQL-Checks
# Ab Version 2.0 sind auch Ordnerbackups moeglich
#
################# CONFIG #####################

backupdir=/data/backup                # Verzeichniss wo die Backups abgelegt werden, es werden automatisch unterordner "mysql" und "files" erstellt.
datenbank=(dbname dbnam2)             # Datenbanken welche gesichert werden sollen
datadir=(/path/to/webdir1 /path/to/webdir2)    # Welche Ordner sollen gesichert werden
dbuser=DBUSER                         # Datenbank User
dbpass=DBPASS                         # Datenbank Passwort
date1=$(date +%a)                     # Datumsformat welches an die Dateien angehangen wird
hostname=$(hostname -f)               # Hostname
mailsubject="MYSQL-Backup - $hostname"        # Mail Betreff
mailtext=/tmp/mailtext.txt            # Mailtext zum Versand
email=EMAIL@ADRESSE                   # Empfaenger der Status Mails
date2=$(date +%A" "%d.%m.%Y)          # Datum für E-Mail

################# CONFIG END #################

# Set PATH
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

# Clear mailtext
echo " " > $mailtext;

# Aktuelles Datum
echo "#############################################################" >> $mailtext
echo "MYSQL Backup Script from $hostname - "$date2 >> $mailtext
echo "#############################################################" >> $mailtext
echo "" >> $mailtext

# Check Backupdir
if test -d $backupdir; then
    echo "";
else
    echo -n "Create Backupdirectory ... " >> $mailtext
    mkdir -p $backupdir
    if test -d $backupdir; then
        echo "done" >> $mailtext
        echo "" >> $mailtext
    else
        echo "Error - Can't create backup directory" >> $mailtext
        exit 1;
    fi
fi

# Check Backupdir for mysql
if test -d $backupdir/mysql; then
    echo "";
else
    echo -n "Create Backupdirectory for mysql ... " >> $mailtext
    mkdir -p $backupdir/mysql
    if test -d $backupdir/mysql; then
        echo "done" >> $mailtext
        echo "" >> $mailtext
    else
        echo "Error - Can't create backup directory for mysql" >> $mailtext
        exit 1;
    fi
fi

# Check Backupdir for files
if test -d $backupdir/files; then
    echo "";
else
    echo -n "Create Backupdirectory for files ... " >> $mailtext
    mkdir -p $backupdir/files
    if test -d $backupdir/files; then
        echo "done" >> $mailtext
        echo "" >> $mailtext
    else
        echo "Error - Can't create backup directory for files" >> $mailtext
        exit 1;
    fi
fi

######################
# Start Files backup #
######################

# count datadir's from config
countdir=${#datadir[*]}

for (( j=0; j<$countdir; j++ )); do
    # reset Error Variable TODO Error handling
    error="0"
    filesdir=${datadir[$j]}
    # make backup from files dir
    name=$(basename $filesdir)
    echo -n "make backup from $filesdir ..." >> $mailtext
    tar -Pczf $backupdir/files/$name'_'$date1.tar.gz $filesdir
    if [ $? -eq 0 ]; then
        echo "done" >> $mailtext
        echo "" >> $mailtext
    else
        echo "error" >> $mailtext
        echo "" >> $mailtext
    fi
done

######################
# Start MYSQL Backup #
######################

# clear mysql checkfile
echo "" > /tmp/mysqlcheck

# count databases from config
count=${#datenbank[*]}

for (( i=0; i<$count; i++ )); do
    # reset Error Variable
    dumperror="0"
    db=${datenbank[$i]}
    # Check MYSQL DB
    echo -n "Check Mysql Database: \"$db\" ... " >> $mailtext
    mysqlcheck -s -u$dbuser -p$dbpass $db >> /tmp/mysqlcheck

    if [ $? -eq 0 ]; then
        mysqlcheck=$(cat /tmp/mysqlcheck)
        if [ -n "$mysqlcheck" ]; then
            echo "Error -> Details am Ende der Mail" >> $mailtext
            echo "" >> $mailtext
        else
            echo "OK" >> $mailtext
            echo "" >> $mailtext
        fi
    else
        echo "Error" >> $mailtext
        echo "" >> $mailtext
    fi

    # Dump MYSQL DB
    echo -n "create dump for db: \"$db\" ... " >> $mailtext
    mysqldump -u$dbuser -p$dbpass --opt $db > $backupdir/mysql/$db'_'$date1.sql
    if [ $? -eq 0 ]; then
        echo "done" >> $mailtext
        sqlfile=$backupdir/mysql/$db'_'$date1.sql
        echo "" >> $mailtext
    else
        echo "Error" >> $mailtext
        dumperror="1"
        echo "" >> $mailtext
    fi

    # Gzip MYSQL Dump
    echo -n "gzip dump for db: \"$db\" ... " >> $mailtext
    if [ $dumperror -eq 0 ]; then
        gzip -f -9 $sqlfile
        if [ $? -eq 0 ]; then
            echo "done" >> $mailtext
            echo "" >> $mailtext
        else
            echo "Error" >> $mailtext
            echo "" >> $mailtext
        fi
    else
        echo "Error" >> $mailtext
        echo "" >> $mailtext
    fi

    if [ -n "$mysqlcheck" ]; then
        echo "" >> $mailtext
        echo "##############################################################" >> $mailtext
        echo "Mysql Check Details: " >> $mailtext
        echo "##############################################################" >> $mailtext
        echo "" >> $mailtext
        cat /tmp/mysqlcheck >> $mailtext
    fi
done

# Mailversand
check_ssmtp_packages() {
    if ! dpkg -l | grep -q msmtp; then
        echo "msmtp packages not installed. Installing..."
        sudo apt-get update
        sudo apt-get install -y msmtp
        if [ $? -ne 0 ]; then
            echo "Failed to install msmtp packages. Exiting..."
            exit 1
        fi
    fi
}

(
  echo "To: $email"
  echo "Subject: $mailsubject"
  echo "Content-Type: text/plain"
  echo
  cat $mailtext
) | msmtp $email

exit 0