#!/bin/bash

# T&M Hansson IT AB © - 2019, https://www.hanssonit.se/

# shellcheck disable=2034,2059
true
# shellcheck source=lib.sh
NC_UPDATE=1 && COLLABORA_INSTALL=1 . <(curl -sL https://raw.githubusercontent.com/nextcloud/vm/master/lib.sh)
unset NC_UPDATE
unset COLLABORA_INSTALL

print_text_in_color "$ICyan" "Installing Collabora..."

# Check for errors + debug code and abort if something isn't right
# 1 = ON
# 0 = OFF
DEBUG=0
debug_mode

# Check if root
root_check

# Nextcloud 13 is required.
lowest_compatible_nc 13

# Test RAM size (2GB min) + CPUs (min 2)
ram_check 2 Collabora
cpu_check 2 Collabora

# Notification
msg_box "Before you start, please make sure that port 80+443 is directly forwarded to this machine!"

# Get the latest packages
apt update -q4 & spinner_loading

# Check if Nextcloud is installed
print_text_in_color "$ICyan" "Checking if Nextcloud is installed..."
if ! curl -s https://"${NCDOMAIN//\\/}"/status.php | grep -q 'installed":true'
then
msg_box "It seems like Nextcloud is not installed or that you don't use https on:
${NCDOMAIN//\\/}.
Please install Nextcloud and make sure your domain is reachable, or activate SSL
on your domain to be able to run this script.

If you use the Nextcloud VM you can use the Let's Encrypt script to get SSL and activate your Nextcloud domain.
When SSL is activated, run these commands from your terminal:
sudo curl -sLO $APP/collabora.sh
sudo bash collabora.sh"
    exit 1
fi

# Check if $SUBDOMAIN exists and is reachable
print_text_in_color "$ICyan" "Checking if $SUBDOMAIN exists and is reachable..."
domain_check_200 "$SUBDOMAIN"

# Check open ports with NMAP
check_open_port 80 "$SUBDOMAIN"
check_open_port 443 "$SUBDOMAIN"

# Install Docker
install_docker

# Check if OnlyOffice or Collabora is previously installed
# If yes, then stop and prune the docker container
docker_prune_this 'collabora/code'
docker_prune_this 'onlyoffice/documentserver'

# Disable RichDocuments (Collabora App) if activated
if [ -d "$NC_APPS_PATH"/richdocuments ]
then
    occ_command app:remove richdocuments
fi

# Disable OnlyOffice (Collabora App) if activated
if [ -d "$NC_APPS_PATH"/onlyoffice ]
then
    occ_command app:remove onlyoffice
fi

# Install Collabora docker
docker pull collabora/code:latest
docker run -t -d -p 127.0.0.1:9980:9980 -e "domain=$NCDOMAIN" --restart always --name code --cap-add MKNOD collabora/code

# Install Apache2
install_if_not apache2

# Enable Apache2 module's
a2enmod proxy
a2enmod proxy_wstunnel
a2enmod proxy_http
a2enmod ssl

if [ -f "$HTTPS_CONF" ]
then
    a2dissite "$SUBDOMAIN.conf"
    rm -f "$HTTPS_CONF"
fi

# Create Vhost for Collabora online in Apache2
if [ ! -f "$HTTPS_CONF" ];
then
    cat << HTTPS_CREATE > "$HTTPS_CONF"
<VirtualHost *:443>
  ServerName $SUBDOMAIN:443
  
  <Directory /var/www>
  Options -Indexes
  </Directory>

  # SSL configuration, you may want to take the easy route instead and use Lets Encrypt!
  SSLEngine on
  SSLCertificateChainFile $CERTFILES/$SUBDOMAIN/chain.pem
  SSLCertificateFile $CERTFILES/$SUBDOMAIN/cert.pem
  SSLCertificateKeyFile $CERTFILES/$SUBDOMAIN/privkey.pem
  SSLOpenSSLConfCmd DHParameters $DHPARAMS
  SSLProtocol             all -SSLv2 -SSLv3
  SSLCipherSuite ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:!DSS
  SSLHonorCipherOrder     on
  SSLCompression off

  # Encoded slashes need to be allowed
  AllowEncodedSlashes NoDecode

  # Container uses a unique non-signed certificate
  SSLProxyEngine On
  SSLProxyVerify None
  SSLProxyCheckPeerCN Off
  SSLProxyCheckPeerName Off

  # keep the host
  ProxyPreserveHost On

  # static html, js, images, etc. served from loolwsd
  # loleaflet is the client part of LibreOffice Online
  ProxyPass           /loleaflet https://127.0.0.1:9980/loleaflet retry=0
  ProxyPassReverse    /loleaflet https://127.0.0.1:9980/loleaflet

  # WOPI discovery URL
  ProxyPass           /hosting/discovery https://127.0.0.1:9980/hosting/discovery retry=0
  ProxyPassReverse    /hosting/discovery https://127.0.0.1:9980/hosting/discovery

  # Main websocket
  ProxyPassMatch "/lool/(.*)/ws$" wss://127.0.0.1:9980/lool/\$1/ws nocanon

  # Admin Console websocket
  ProxyPass   /lool/adminws wss://127.0.0.1:9980/lool/adminws

  # Download as, Fullscreen presentation and Image upload operations
  ProxyPass           /lool https://127.0.0.1:9980/lool
  ProxyPassReverse    /lool https://127.0.0.1:9980/lool
</VirtualHost>
HTTPS_CREATE

    if [ -f "$HTTPS_CONF" ];
    then
        print_text_in_color "$IGreen" "$HTTPS_CONF was successfully created."
        sleep 1
    else
        print_text_in_color "$IRed" "Unable to create vhost, exiting..."
        print_text_in_color "$IRed" "Please report this issue here $ISSUES"
        exit 1
    fi
fi

# Install certbot (Let's Encrypt)
install_certbot

# Generate certs
if le_subdomain
then
    # Generate DHparams chifer
    if [ ! -f "$DHPARAMS" ]
    then
        openssl dhparam -dsaparam -out "$DHPARAMS" 4096
    fi
    printf "%b" "${IGreen}Certs are generated!\n${Color_Off}"
    a2ensite "$SUBDOMAIN.conf"
    restart_webserver
    # Install Collabora App
    occ_command app:install richdocuments
else
	print_text_in_color "$IRed" "It seems like no certs were generated, please report this issue here: $ISSUES"
    any_key "Press any key to continue... "
    restart_webserver
fi

# Set config for RichDocuments (Collabora App)
if [ -d "$NC_APPS_PATH"/richdocuments ]
then
    occ_command config:app:set richdocuments wopi_url --value=https://"$SUBDOMAIN"
    chown -R www-data:www-data "$NC_APPS_PATH"
    occ_command config:system:set trusted_domains 3 --value="$SUBDOMAIN"
    # Add prune command
    {
    echo "#!/bin/bash"
    echo "docker system prune -a --force"
    echo "exit"
    } > "$SCRIPTS/dockerprune.sh"
    chmod a+x "$SCRIPTS/dockerprune.sh"
    crontab -u root -l | { cat; echo "@weekly $SCRIPTS/dockerprune.sh"; } | crontab -u root -
    print_text_in_color "$ICyan" "Docker automatic prune job added."
    service docker restart
    docker restart code
    print_text_in_color "$IGreen" "Collabora is now successfully installed."
    any_key "Press any key to continue... "
fi

exit