#!/bin/sh

set -e

[ -z "${WEBDAV_USERNAME}" ] && \
  WEBDAV_USERNAME=webdav
[ -z "${WEBDAV_PASSWORD}" ] && \
  WEBDAV_PASSWORD=webdav

sudo apt install -y apache2

cat <<EOF | sudo tee /etc/apache2/sites-available/webdav.conf
Alias /webdav /var/www/webdav

<VirtualHost _default_:443>
  SSLEngine on
  SSLCertificateFile    /etc/ssl/certs/ssl-cert-snakeoil.pem
  SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key
</VirtualHost>

<Location /webdav>
  DAV On
  SSLRequireSSL
  AuthType Digest
  AuthName webdav
  AuthUserFile /etc/apache2/.webdav
  Require valid-user
</Location>
EOF

sudo mkdir /var/www/webdav
sudo chown www-data:www-data /var/www/webdav

for mod in dav dav_fs dav_lock ssl auth_digest; do
  sudo a2enmod ${mod}
done
sudo a2ensite webdav
sudo systemctl restart apache2

# Create digest password file with expect command.
sudo apt install -y expect
expect -c "
set timeout -1
spawn sudo htdigest -c /etc/apache2/.webdav webdav ${WEBDAV_USERNAME}
expect \"New password: \"
send \"${WEBDAV_PASSWORD}\n\"
expect \"Re-type new password: \"
send \"${WEBDAV_PASSWORD}\n\"
expect eof
"