#!/bin/bash

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

true
SCRIPT_NAME="OnlyOffice (Docker)"
SCRIPT_EXPLAINER="This script will install the OnlyOffice Document Server bundled with Docker"
# shellcheck source=lib.sh
source /var/scripts/fetch_lib.sh

# 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

# Check if collabora is already installed
if ! does_this_docker_exist 'onlyoffice/documentserver'
then
    # Ask for installing
    install_popup "$SCRIPT_NAME"
else
    # Ask for removal or reinstallation
    reinstall_remove_menu "$SCRIPT_NAME"
    # Removal
    remove_onlyoffice_docker
    # Remove config.php value set when install was successful
    nextcloud_occ config:system:delete allow_local_remote_servers
    # Show successful uninstall if applicable
    removal_popup "$SCRIPT_NAME"
fi

# Check if collabora is installed and remove every trace of it
if does_this_docker_exist 'collabora/code'
then
    # Removal
    remove_collabora_docker
fi

# Remove all office apps
remove_all_office_apps

# Check if apache2 evasive-mod is enabled and disable it because of compatibility issues
if [ "$(apache2ctl -M | grep evasive)" != "" ]
then
    msg_box "We noticed that 'mod_evasive' is installed which is the DDOS protection for webservices. \
It has compatibility issues with OnlyOffice and you can now choose to disable it."
    if ! yesno_box_yes "Do you want to disable DDOS protection?"
    then
        print_text_in_color "$ICyan" "Keeping mod_evasive active."
    else
        a2dismod evasive
        # a2dismod mod-evasive # not needed, but existing in the Extra Security script.
        apt-get purge libapache2-mod-evasive -y
	systemctl restart apache2
    fi
fi

# Ask for the domain for OnlyOffice
SUBDOMAIN=$(input_box_flow "OnlyOffice subdomain e.g: office.yourdomain.com
NOTE: This domain must be different than your Nextcloud domain. \
They can however be hosted on the same server, but would require separate DNS entries.")

# Nextcloud Main Domain
NCDOMAIN=$(nextcloud_occ_no_check config:system:get overwrite.cli.url | sed 's|https://||;s|/||')

true
# shellcheck source=lib.sh
source /var/scripts/fetch_lib.sh

# Get all needed variables from the library
nc_update

# Notification
msg_box "Before continuing, please make sure that you have you have \
edited the DNS settings for $SUBDOMAIN, and opened port 80 and 443 \
directly to this servers IP. A full extensive guide can be found here:
https://www.techandme.se/open-port-80-443

This can be done automatically if you have UPNP enabled in your firewall/router. \
You will be offered to use UPNP in the next step.

PLEASE NOTE:
Using other ports than the default 80 and 443 is not supported, \
though it may be possible with some custom modification:
https://help.nextcloud.com/t/domain-refused-to-connect-collabora/91303/17"

if yesno_box_no "Do you want to use UPNP to open port 80 and 443?"
then
    unset FAIL
    open_port 80 TCP
    open_port 443 TCP
    cleanup_open_port
fi

# Get the latest packages
apt-get 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 TLS
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 TLS and activate your Nextcloud domain.
When TLS is activated, run these commands from your CLI:
sudo curl -sLO $APP/onlyoffice_docker.sh
sudo bash onlyoffice_docker.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"

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

# Check if Nextcloud is installed with TLS
check_nextcloud_https "OnlyOffice (Docker)"

# Install Docker
install_docker

# Install Onlyoffice docker
docker pull onlyoffice/documentserver:latest
docker run -i -t -d -p 127.0.0.3:9090:80 --restart always --name onlyoffice onlyoffice/documentserver

# Install apache2
install_if_not apache2

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

# Only add TLS 1.3 on Ubuntu later than 20.04
if version 20.04 "$DISTRO" 22.04.10
then
    TLS13="+TLSv1.3"
fi

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

# Create Vhost for OnlyOffice Docker online in Apache2
if [ ! -f "$HTTPS_CONF" ];
then
    cat << HTTPS_CREATE > "$HTTPS_CONF"
<VirtualHost *:443>
     ServerName $SUBDOMAIN:443

    SSLCertificateChainFile $CERTFILES/$SUBDOMAIN/chain.pem
    SSLCertificateFile $CERTFILES/$SUBDOMAIN/cert.pem
    SSLCertificateKeyFile $CERTFILES/$SUBDOMAIN/privkey.pem
    SSLOpenSSLConfCmd DHParameters $DHPARAMS_SUB

    # Intermediate configuration
    SSLEngine               on
    SSLCompression          off
    SSLProtocol             -all +TLSv1.2 $TLS13
    SSLCipherSuite          ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384 
    SSLHonorCipherOrder     off
    SSLSessionTickets       off
    ServerSignature         off

    # Logs
    LogLevel warn
    CustomLog \${APACHE_LOG_DIR}/access.log combined
    ErrorLog \${APACHE_LOG_DIR}/error.log

    # Just in case - see below
    SSLProxyEngine On
    SSLProxyVerify None
    SSLProxyCheckPeerCN Off
    SSLProxyCheckPeerName Off

    # Improve security settings
    Header set X-XSS-Protection "1; mode=block"
    Header set Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
    Header set X-Content-Type-Options nosniff
    Header set Content-Security-Policy "frame-ancestors 'self' $NCDOMAIN"

    # contra mixed content warnings
    RequestHeader set X-Forwarded-Proto "https"

    # basic proxy settings
    ProxyRequests off

    ProxyPassMatch (.*)(\/websocket)$ "ws://127.0.0.3:9090/$1$2"
    ProxyPass / "http://127.0.0.3:9090/"
    ProxyPassReverse / "http://127.0.0.3:9090/"

    <Location />
        ProxyPassReverse /
    </Location>
</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 generate_cert "$SUBDOMAIN"
then
    # Generate DHparams cipher
    if [ ! -f "$DHPARAMS_SUB" ]
    then
        openssl dhparam -out "$DHPARAMS_SUB" 2048
    fi
    print_text_in_color "$IGreen" "Certs are generated!"
    a2ensite "$SUBDOMAIN.conf"
    restart_webserver
    # Install OnlyOffice
    install_and_enable_app onlyoffice
else
    last_fail_tls "$SCRIPTS"/apps/onlyoffice.sh
    exit 1
fi

# Set config for OnlyOffice
if [ -d "$NC_APPS_PATH"/onlyoffice ]
then
    nextcloud_occ config:app:set onlyoffice DocumentServerUrl --value=https://"$SUBDOMAIN/"
    chown -R www-data:www-data "$NC_APPS_PATH"
    # Appending the new domain to trusted domains
    add_to_trusted_domains "$SUBDOMAIN"
    # Allow remote servers with local addresses e.g. in federated shares, webcal services and more
    nextcloud_occ config:system:set allow_local_remote_servers --value="true"
    # Add prune command
    add_dockerprune
    # Restart Docker
    print_text_in_color "$ICyan" "Restarting Docker..."
    docker restart onlyoffice
    msg_box "OnlyOffice Docker is now successfully installed. 
Please be aware that the container is currently starting which can take a few minutes."
fi

exit