#!/bin/bash

if [ $# -lt 3 ] && [ $# -gt 0 ]; then

cat << EOF

Incorrect number of arguments provided. Please either provide all
 of the below arguments or provide none to use the default values
 set in the script.

1: The domain (or name of your folder in /var/www)
2: The name of the application (to be used in naming the files)
3: The name of the database to back up

e.g. backupBookstack.sh docs.example.com docstack documentdb
                        ^ (1)            ^ (2)    ^ (3)

EOF
exit 1
fi

if [[ `id -u` -ne 0 ]]; then
 echo "This script must be run as root..."
 exit 1
fi

domain="bookstack.dismyserver.net" # The name of the directory in /var/www
application="" # Only populate if this not the default bookstack instance
appdatabase="bookstack" # seems important to get right

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

[ -z $application ] || application="${application}-"
[ -z $1 ] || domain=$1
[ -z $2 ] || application=$2
[ -z $3 ] || appdatabase=$3

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

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