#!/bin/bash

# -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- #
#             USER CONFIGURED VARIABLES           #
# -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- #

domain="bookstack.dismyserver.net" # The name of the directory in /var/www
sqlbackupuser="backupuser"         # The user that has permission to dump DBs
sqlbackupuserpassword="hunter2"    # Said user's password
termuser='rooot'                   # The user that you want to access the backup files with
backgroup='backupboi'              # The group that can read the backup files

# -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- #

arg1=$1
[ $arg1 == "-h" ] && helpme=1;arg1=$2
[ -z $arg1 ] || domain=$arg1
application=''
if [ $domain != "bookstack.dismyserver.net" ]; then
 if [[ $domain == *"."* ]] && [ -z $2 ]; then
  application=`echo $domain | cut -d. -f2`
 else
  [ -z $2 ] && application=$domain || application=$2
 fi
fi

if [ $# -gt 2 ] || [ $helpme ]; then

cat << EOF

No arguments will follow the default values provided at the top of the script.

Current defaults:

domain: ${domain}
application: ${application}

Usage:

backupBookstack.sh [domain/folder] [name]

- domain/folder is the directory in /var/www that your bookstack instance lives
- name is useful if your directory does not have any periods and you do not want to use the domain name as the application name.

EOF
exit 1
fi

if [[ `id -u` -ne 0 ]]; then
 echo "This script must be run as root..."
 exit
fi

[ -z $application ] || application="${application}-"

appdatabase=`grep DB_DATABASE /var/www/${domain}/.env | cut -d= -f2`
[ -z $appdatabase ] && echo "Unable to determine database. Exiting.";exit 1
isodate=`date +%Y-%m-%d_%H-%M-%S%z`
backupdir="/tmp/${application}bookstack-backup-${isodate}"
backupenddir="/backups/${application}bookstack"

mkdir -p $backupdir/public
mkdir -p $backupdir/storage

phpver=`php -v`
apachever=`apache2 -v`
apachemod=`apache2ctl -M 2>/dev/null`
serverver=`grep -h DISTRIB_DESCRIPTION /etc/*release | cut -d= -f2 | tr -d \"`
sqlver=`mysql --version`

cp -r /var/www/${domain}/public/uploads $backupdir/public/
cp -r /var/www/${domain}/storage/uploads $backupdir/storage/
cp /var/www/${domain}/.env* $backupdir/
cat > ${backupdir}/restore-notes.txt << EOF
Backup for ${isodate}

Backed up the following directories:

- /var/www/${domain}/public/uploads
- /var/www/${domain}/storage/uploads
- /var/www/${domain}/.env*

Backed up the following database:

- ${appdatabase}

7zip does not save file permissions or users/groups.
Be sure to change these manually if a restore is
performed.

https://www.bookstackapp.com/docs/admin/backup-restore/

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
             The Boring Stuff
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Server Version

${serverver}

PHP Version

${phpver}

SQL Version

${sqlver}

Apache Version

${apachever}

Enabled Apache Modules

static = compiled into Apache
shared = dynamically loaded

${apachemod}
EOF

# https://bencane.com/2011/12/12/creating-a-read-only-backup-user-for-mysqldump/
mysqldump -u${sqlbackupuser} -p${sqlbackupuserpassword} ${appdatabase} > $backupdir/${application}bookstack-$isodate.sql

mkdir -p $backupenddir
chown -R $termuser:$backgroup $backupenddir

7z a $backupenddir/${application}bookstack_$isodate.7z $backupdir/* >/dev/null
chown $termuser:$backgroup $backupenddir/${application}bookstack_$isodate.7z
chmod 640 $backupenddir/${application}bookstack_$isodate.7z
rm -rf $backupdir