#!/bin/bash
#  _____               _           _
# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
#
#                              Freedom in the Cloud
#
# Etherpad app
#
# License
# =======
#
# Copyright (C) 2016-2018 Bob Mottram <bob@freedombone.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

VARIANTS="full full-vim writer"

IN_DEFAULT_INSTALL=0
SHOW_ON_ABOUT=1
MINIMUM_RAM_MB=2000

ETHERPAD_DOMAIN_NAME=
ETHERPAD_CODE=
ETHERPAD_ONION_PORT=8101
ETHERPAD_PORT=9001
ETHERPAD_REPO="https://github.com/ether/etherpad-lite"
ETHERPAD_COMMIT='454f539561a8d9de51ed107a29d974eb79198bc6'
ETHERPAD_ADMIN_PASSWORD=
ETHERPAD_TITLE=$'Freedombone Docs'
ETHERPAD_WELCOME_MESSAGE=$"Welcome to ${ETHERPAD_TITLE}!\\n\\nThis pad text is synchronized as you type, so that everyone viewing this page sees the same text. This allows you to collaborate seamlessly on documents!"

ETHERPAD_SHORT_DESCRIPTION=$'Collaborative document editor'
ETHERPAD_DESCRIPTION=$'Collaborative document editor'
ETHERPAD_MOBILE_APP_URL=

etherpad_variables=(ONION_ONLY
                    DEFAULT_DOMAIN_NAME
                    ETHERPAD_DOMAIN_NAME
                    ETHERPAD_CODE
                    ETHERPAD_TITLE
                    ETHERPAD_WELCOME_MESSAGE
                    DDNS_PROVIDER
                    MY_USERNAME)

function logging_on_etherpad {
    echo -n ''
}

function logging_off_etherpad {
    echo -n ''
}

function change_password_etherpad {
    change_username="$1"
    new_user_password="$2"

    read_config_param ETHERPAD_DOMAIN_NAME

    if grep -q "\"$change_username\": {" /var/www/${ETHERPAD_DOMAIN_NAME}/htdocs/settings.json; then
        user_line=$(grep "\"$change_username\": {" "/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs/settings.json")
        if [[ "$user_line" == *"\"is_admin\": true"* ]]; then
            sed -i "s|\"$change_username\": {.*|\"$change_username\": { \"password\": \"$new_user_password\", \"is_admin\": true }|g" "/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs/settings.json"
        else
            sed -i "s|\"$change_username\": {.*|\"$change_username\": { \"password\": \"$new_user_password\", \"is_admin\": false },|g" /var/www/${ETHERPAD_DOMAIN_NAME}/htdocs/settings.json
        fi
        "${PROJECT_NAME}-pass" -u "$change_username" -a etherpad -p "$2"
        systemctl restart etherpad
    fi
}

function etherpad_create_database {
    if [ -f "$IMAGE_PASSWORD_FILE" ]; then
        ETHERPAD_ADMIN_PASSWORD="$(printf "%s" "$(cat "$IMAGE_PASSWORD_FILE")")"
    else
        if [ ! "$ETHERPAD_ADMIN_PASSWORD" ]; then
            ETHERPAD_ADMIN_PASSWORD="$(create_password "${MINIMUM_PASSWORD_LENGTH}")"
        fi
    fi
    if [ ! "$ETHERPAD_ADMIN_PASSWORD" ]; then
        return
    fi

    function_check create_database
    create_database etherpad "$ETHERPAD_ADMIN_PASSWORD" "$MY_USERNAME"
}

function create_etherpad_settings {
    settings_file="/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs/settings.json"
    { echo '{';
      echo "  \"title\": \"${ETHERPAD_TITLE}\",";
      echo '  "favicon": "favicon.ico",';

      echo '  "ip": "127.0.0.1",';
      echo "  \"port\" : ${ETHERPAD_PORT},";

      echo '  "showSettingsInAdminPage" : true,';
      echo '   "dbType" : "mysql",';
      echo '   "dbSettings" : {';
      echo '                    "user"    : "root",';
      echo '                    "host"    : "localhost",';
      echo "                    \"password\": \"${MARIADB_PASSWORD}\",";
      echo '                    "database": "etherpad",';
      echo '                    "charset" : "utf8mb4"';
      echo '                  },';

      echo "  \"defaultPadText\" : \"${ETHERPAD_WELCOME_MESSAGE}\",";

      echo '  "padOptions": {';
      echo '    "noColors": false,';
      echo '    "showControls": true,';
      echo '    "showChat": true,';
      echo '    "showLineNumbers": false,';
      echo '    "useMonospaceFont": false,';
      echo '    "userName": false,';
      echo '    "userColor": true,';
      echo '    "rtl": false,';
      echo '    "alwaysShowChat": true,';
      echo '    "chatAndUsers": true,';
      echo '    "lang": "en-gb"';
      echo '  },';

      echo '  "suppressErrorsInPadText" : true,';
      echo '  "requireSession" : false,';
      echo '  "editOnly" : false,';
      echo '  "sessionNoPassword" : false,';
      echo '  "minify" : true,';
      echo '  "maxAge" : 21600, // 60 * 60 * 6 = 6 hours';
      echo '  "abiword" : null,';
      echo '  "soffice" : null,';
      echo '  "tidyHtml" : null,';
      echo '  "allowUnknownFileEnds" : false,';
      echo '  "requireAuthentication" : true,';
      echo '  "requireAuthorization" : true,';
      echo '  "trustProxy" : false,';
      echo '  "disableIPlogging" : true,';

      echo '  "users": {';
      echo "    \"${MY_USERNAME}\": { \"password\": \"${ETHERPAD_ADMIN_PASSWORD}\", \"is_admin\": true }";
      echo '  },';

      echo '  "socketTransportProtocols" : ["xhr-polling", "jsonp-polling", "htmlfile"],';
      echo '  "loadTest": false,';
      echo '  "indentationOnNewLine": false,';

      echo '  "toolbar": {';
      echo '    "left": [';
      echo '      ["bold", "italic", "underline", "strikethrough"],';
      echo '      ["orderedlist", "unorderedlist", "indent", "outdent"],';
      echo '      ["undo", "redo"],';
      echo '      ["clearauthorship"]';
      echo '    ],';
      echo '    "right": [';
      echo '      ["importexport", "timeslider", "savedrevision"],';
      echo '      ["settings", "embed"],';
      echo '      ["showusers"]';
      echo '    ],';
      echo '    "timeslider": [';
      echo '      ["timeslider_export", "timeslider_returnToPad"]';
      echo '    ]';
      echo '  },';
      echo '  "loglevel": "INFO"';
      echo '}'; } > $settings_file
    chmod 600 $settings_file
}

function remove_user_etherpad {
    remove_username="$1"
    settings_file=/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs/settings.json

    "${PROJECT_NAME}-pass" -u "$remove_username" --rmapp etherpad

    if grep -q "\"$remove_username\": {" $settings_file; then
        sed -i "/\"$remove_username\": {/d" $settings_file
        systemctl restart etherpad
    fi
}

function add_user_etherpad {
    new_username="$1"
    new_user_password="$2"
    settings_file=/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs/settings.json

    if ! grep -q "\"$new_username\": {" $settings_file; then
        "${PROJECT_NAME}-pass" -u "$new_username" -a etherpad -p "$2"
        sed -i "/\"users\": {/a    \"$new_username\": { \"password\": \"$new_user_password\", \"is_admin\": false }," $settings_file
        if grep -q "\"$new_username\": {" $settings_file; then
            systemctl restart etherpad
        else
            echo '1'
            return
        fi
    fi
    echo '0'
}

function install_interactive_etherpad {
    if [ ! "$ONION_ONLY" ]; then
        ONION_ONLY='no'
    fi

    if [[ "$ONION_ONLY" != "no" ]]; then
        ETHERPAD_DOMAIN_NAME='etherpad.local'
        write_config_param "ETHERPAD_DOMAIN_NAME" "$ETHERPAD_DOMAIN_NAME"
    else
        function_check interactive_site_details
        interactive_site_details "etherpad" "ETHERPAD_DOMAIN_NAME" "ETHERPAD_CODE"
    fi
    APP_INSTALLED=1
}

function etherpad_set_title {
    read_config_param "ETHERPAD_TITLE"
    data=$(mktemp 2>/dev/null)
    dialog --title $"Etherpad Title" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $'Set a title for your etherpad system' 10 60 "$ETHERPAD_TITLE" 2>"$data"
    sel=$?
    case $sel in
        0)
            temp_title=$(<"$data")
            if [ ${#temp_title} -gt 0 ]; then
                ETHERPAD_TITLE="$temp_title"
                settings_file="/var/www/$ETHERPAD_DOMAIN_NAME/htdocs/settings.json"

                write_config_param "ETHERPAD_TITLE" "$ETHERPAD_TITLE"
                sed -i "s|\"title\":.*|\"title\": \"${ETHERPAD_TITLE}\"|g" $settings_file

                dialog --title $"Etherpad Title" \
                       --msgbox $"Title has been set" 6 60
            fi
           ;;
    esac
    rm -f "$data"
}

function etherpad_set_welcome_message {
    read_config_param "ETHERPAD_WELCOME_MESSAGE"
    data=$(mktemp 2>/dev/null)
    dialog --title $"Etherpad Welcome Message" \
           --backtitle $"Freedombone Control Panel" \
           --inputbox $'Set a welcome message, which can include html formatting' 10 60 "$ETHERPAD_WELCOME_MESSAGE" 2>"$data"
    sel=$?
    case $sel in
        0)
            temp_welcome=$(<"$data")
            if [ ${#temp_welcome} -gt 0 ]; then
                ETHERPAD_WELCOME_MESSAGE="$temp_welcome"
                settings_file="/var/www/$ETHERPAD_DOMAIN_NAME/htdocs/settings.json"

                write_config_param "ETHERPAD_WELCOME_MESSAGE" "$ETHERPAD_WELCOME_MESSAGE"
                sed -i "s|\"defaultPadText\" :.*|\"defaultPadText\" : \"${ETHERPAD_WELCOME_MESSAGE}\"|g" $settings_file

                dialog --title $"Etherpad Welcome Message" \
                       --msgbox $"Welcome message has been set" 6 60
            fi
           ;;
    esac
    rm -f "$data"
}

function configure_interactive_etherpad {
    W=(1 $"Set Title"
       2 $"Set a welcome message")

    while true
    do
        # shellcheck disable=SC2068
        selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"Etherpad" --menu $"Choose an operation, or ESC to exit:" 10 60 2 "${W[@]}" 3>&2 2>&1 1>&3)

        if [ ! "$selection" ]; then
            break
        fi

        case $selection in
            1) etherpad_set_title;;
            2) etherpad_set_welcome_message;;
        esac
    done
}

function reconfigure_etherpad {
    create_etherpad_settings
    systemctl restart etherpad
}

function upgrade_etherpad {
    CURR_ETHERPAD_COMMIT=$(get_completion_param "etherpad commit")
    if [[ "$CURR_ETHERPAD_COMMIT" == "$ETHERPAD_COMMIT" ]]; then
        return
    fi

    read_config_param "ETHERPAD_DOMAIN_NAME"

    function_check set_repo_commit
    set_repo_commit /var/www/$ETHERPAD_DOMAIN_NAME/htdocs "etherpad commit" "$ETHERPAD_COMMIT" $ETHERPAD_REPO
}

function backup_local_etherpad {
    ETHERPAD_DOMAIN_NAME='etherpad'
    if grep -q "etherpad domain" "$COMPLETION_FILE"; then
        ETHERPAD_DOMAIN_NAME=$(get_completion_param "etherpad domain")
    fi

    source_directory=/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs
    if [ -d "$source_directory" ]; then
        dest_directory=etherpad
        function_check suspend_site
        suspend_site "${ETHERPAD_DOMAIN_NAME}"

        function_check backup_directory_to_usb
        backup_directory_to_usb "$source_directory" "$dest_directory"

        function_check backup_database_to_usb
        backup_database_to_usb etherpad

        function_check restart_site
        restart_site
    fi
}

function restore_local_etherpad {
    if ! grep -q "etherpad domain" "$COMPLETION_FILE"; then
        return
    fi
    ETHERPAD_DOMAIN_NAME=$(get_completion_param "etherpad domain")
    if [ "$ETHERPAD_DOMAIN_NAME" ]; then
        temp_restore_dir=/root/tempetherpad
        #etherpad_dir="/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs"

        function_check etherpad_create_database
        etherpad_create_database

        restore_database etherpad "${ETHERPAD_DOMAIN_NAME}"
        if [ -d $temp_restore_dir ]; then
            rm -rf $temp_restore_dir
        fi

        chown -R etherpad: "/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs"
        if [ -f "/etc/ssl/certs/${ETHERPAD_DOMAIN_NAME}.pem" ]; then
            chown etherpad: "/etc/ssl/certs/${ETHERPAD_DOMAIN_NAME}.pem"
        fi
        if [ -f "/etc/ssl/private/${ETHERPAD_DOMAIN_NAME}.key" ]; then
            chown etherpad: "/etc/ssl/private/${ETHERPAD_DOMAIN_NAME}.key"
        fi

        MARIADB_PASSWORD=$("${PROJECT_NAME}-pass" -u root -a mariadb)
        settings_file="/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs/settings.json"
        sed -i "s|\"password\":.*|\"password\": \"${MARIADB_PASSWORD}\",|g" "$settings_file"
        MARIADB_PASSWORD=
    fi
}

function backup_remote_etherpad {
    if grep -q "etherpad domain" "$COMPLETION_FILE"; then
        ETHERPAD_DOMAIN_NAME=$(get_completion_param "etherpad domain")
        temp_backup_dir="/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs"
        if [ -d "$temp_backup_dir" ]; then
            function_check suspend_site
            suspend_site "${ETHERPAD_DOMAIN_NAME}"

            function_check backup_database_to_friend
            backup_database_to_friend etherpad

            function_check backup_directory_to_friend
            backup_directory_to_friend "$temp_backup_dir" etherpad

            function_check restart_site
            restart_site
        else
            echo $"etherpad domain specified but not found in ${temp_backup_dir}"
        fi
    fi
}

function restore_remote_etherpad {
    if grep -q "etherpad domain" "$COMPLETION_FILE"; then
        ETHERPAD_DOMAIN_NAME=$(get_completion_param "etherpad domain")

        function_check etherpad_create_database
        etherpad_create_database

        function_check restore_database_from_friend
        restore_database_from_friend etherpad "${ETHERPAD_DOMAIN_NAME}"
        if [ -d /root/tempetherpad ]; then
            rm -rf /root/tempetherpad
        fi

        chown -R etherpad: "/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs"
        if [ -f "/etc/ssl/certs/${ETHERPAD_DOMAIN_NAME}.pem" ]; then
            chown etherpad: "/etc/ssl/certs/${ETHERPAD_DOMAIN_NAME}.pem"
        fi
        if [ -f "/etc/ssl/private/${ETHERPAD_DOMAIN_NAME}.key" ]; then
            chown etherpad: "/etc/ssl/private/${ETHERPAD_DOMAIN_NAME}.key"
        fi

        MARIADB_PASSWORD=$("${PROJECT_NAME}-pass" -u root -a mariadb)
        settings_file="/var/www/${ETHERPAD_DOMAIN_NAME}/htdocs/settings.json"
        sed -i "s|\"password\":.*|\"password\": \"${MARIADB_PASSWORD}\",|g" "$settings_file"
        MARIADB_PASSWORD=
    fi
}

function remove_etherpad {
    if [ ${#ETHERPAD_DOMAIN_NAME} -eq 0 ]; then
        return
    fi
    read_config_param "ETHERPAD_DOMAIN_NAME"
    read_config_param "MY_USERNAME"
    echo "Removing $ETHERPAD_DOMAIN_NAME"
    if [ -f /etc/systemd/system/etherpad.service ]; then
        systemctl stop etherpad
        systemctl disable etherpad
        rm /etc/systemd/system/etherpad.service
    fi
    systemctl daemon-reload
    nginx_dissite "$ETHERPAD_DOMAIN_NAME"
    remove_certs "$ETHERPAD_DOMAIN_NAME"
    if [ -d "/var/www/$ETHERPAD_DOMAIN_NAME" ]; then
        rm -rf "/var/www/$ETHERPAD_DOMAIN_NAME"
    fi
    if [ -f "/etc/nginx/sites-available/$ETHERPAD_DOMAIN_NAME" ]; then
        rm "/etc/nginx/sites-available/$ETHERPAD_DOMAIN_NAME"
    fi
    function_check drop_database
    drop_database etherpad
    function_check remove_onion_service
    remove_onion_service etherpad ${ETHERPAD_ONION_PORT}
    remove_app etherpad
    remove_completion_param install_etherpad
    sed -i '/etherpad/d' "$COMPLETION_FILE"
    remove_backup_database_local etherpad
    remove_nodejs etherpad

    groupdel -f etherpad
    userdel -r etherpad

    function_check remove_ddns_domain
    remove_ddns_domain "$ETHERPAD_DOMAIN_NAME"
}

function install_etherpad {
    if [ ! "$ETHERPAD_DOMAIN_NAME" ]; then
        echo $'No domain name was given for etherpad'
        exit 7359
    fi

    check_ram_availability 2000

    if [ -f "$IMAGE_PASSWORD_FILE" ]; then
        ETHERPAD_ADMIN_PASSWORD="$(printf "%s" "$(cat "$IMAGE_PASSWORD_FILE")")"
    else
        if [ ! "$ETHERPAD_ADMIN_PASSWORD" ]; then
            ETHERPAD_ADMIN_PASSWORD="$(create_password "${MINIMUM_PASSWORD_LENGTH}")"
        fi
    fi

    function_check install_mariadb
    install_mariadb

    function_check get_mariadb_password
    get_mariadb_password

    function_check repair_databases_script
    repair_databases_script

    apt-get -yq install gzip git curl python libssl-dev pkg-config \
            build-essential python g++ make checkinstall \
            python-bcrypt python-passlib

    function_check install_nodejs
    install_nodejs etherpad

    if [ ! -d "/var/www/$ETHERPAD_DOMAIN_NAME" ]; then
        mkdir "/var/www/$ETHERPAD_DOMAIN_NAME"
    fi
    if [ ! -d "/var/www/$ETHERPAD_DOMAIN_NAME/htdocs" ]; then

        if [ -d /repos/etherpad ]; then
            mkdir "/var/www/$ETHERPAD_DOMAIN_NAME/htdocs"
            cp -r -p /repos/etherpad/. "/var/www/$ETHERPAD_DOMAIN_NAME/htdocs"
            cd "/var/www/$ETHERPAD_DOMAIN_NAME/htdocs" || exit 32468346
            git pull
        else
            function_check git_clone
            git_clone "$ETHERPAD_REPO" "/var/www/$ETHERPAD_DOMAIN_NAME/htdocs"
        fi

        if [ ! -d "/var/www/$ETHERPAD_DOMAIN_NAME/htdocs" ]; then
            echo $'Unable to clone etherpad repo'
            exit 56382
        fi
    fi

    cd "/var/www/$ETHERPAD_DOMAIN_NAME/htdocs" || exit 24654824
    git checkout "$ETHERPAD_COMMIT" -b "$ETHERPAD_COMMIT"
    set_completion_param "etherpad commit" "$ETHERPAD_COMMIT"

    chmod a+w "/var/www/$ETHERPAD_DOMAIN_NAME/htdocs"
    chown www-data:www-data "/var/www/$ETHERPAD_DOMAIN_NAME/htdocs"

    function_check etherpad_create_database
    etherpad_create_database

    function_check add_ddns_domain
    add_ddns_domain "$ETHERPAD_DOMAIN_NAME"

    create_etherpad_settings

    adduser --system --home="/var/www/$ETHERPAD_DOMAIN_NAME/htdocs/" --group etherpad
    chown -R etherpad: "/var/www/$ETHERPAD_DOMAIN_NAME/htdocs/"

    { echo '[Unit]';
      echo 'Description=etherpad-lite (real-time collaborative document editing)';
      echo 'After=syslog.target network.target';
      echo '';
      echo '[Service]';
      echo 'Type=simple';
      echo 'User=etherpad';
      echo 'Group=etherpad';
      echo "WorkingDirectory=/var/www/$ETHERPAD_DOMAIN_NAME/htdocs";
      echo "ExecStart=/var/www/$ETHERPAD_DOMAIN_NAME/htdocs/bin/run.sh";
      echo 'Restart=on-failure';
      echo 'SuccessExitStatus=3 4';
      echo 'RestartForceExitStatus=3 4';
      echo '';
      echo '[Install]';
      echo 'WantedBy=multi-user.target'; } > /etc/systemd/system/etherpad.service
    chmod +x /etc/systemd/system/etherpad.service

    etherpad_nginx_site=/etc/nginx/sites-available/$ETHERPAD_DOMAIN_NAME
    if [[ $ONION_ONLY == "no" ]]; then
        function_check nginx_http_redirect
        nginx_http_redirect "$ETHERPAD_DOMAIN_NAME"
        { echo 'server {';
        echo '  listen 443 ssl;';
        echo '  #listen [::]:443 ssl;';
        echo "  server_name $ETHERPAD_DOMAIN_NAME;";
        echo '';
        echo '  # Security'; } >> "$etherpad_nginx_site"
        function_check nginx_ssl
        nginx_ssl "$ETHERPAD_DOMAIN_NAME"

        function_check nginx_security_options
        nginx_security_options "$ETHERPAD_DOMAIN_NAME"

        { echo '  add_header Strict-Transport-Security max-age=15768000;';
        echo '';
        echo '  # Logs';
        echo '  access_log /dev/null;';
        echo '  error_log /dev/null;';
        echo '';
        echo '  # Root';
        echo "  root /var/www/$ETHERPAD_DOMAIN_NAME/htdocs;";
        echo '';
        echo '  location / {'; } >> "$etherpad_nginx_site"
        function_check nginx_limits
        nginx_limits "$ETHERPAD_DOMAIN_NAME" '15m'
        { echo "    proxy_pass        http://localhost:${ETHERPAD_PORT}/;";
          echo "    proxy_set_header  Host \$host;";
          echo '    proxy_buffering   off;';
          echo '  }';
          echo '}'; } >> "$etherpad_nginx_site"
    else
        echo -n '' > "$etherpad_nginx_site"
    fi
    { echo 'server {';
      echo "    listen 127.0.0.1:$ETHERPAD_ONION_PORT default_server;";
      echo "    server_name $ETHERPAD_ONION_HOSTNAME;";
      echo ''; } >> "$etherpad_nginx_site"
    function_check nginx_security_options
    nginx_security_options "$ETHERPAD_DOMAIN_NAME"
    { echo '';
      echo '  # Logs';
      echo '  access_log /dev/null;';
      echo '  error_log /dev/null;';
      echo '';
      echo '  # Root';
      echo "  root /var/www/$ETHERPAD_DOMAIN_NAME/htdocs;";
      echo '';
      echo '  location / {'; } >> "$etherpad_nginx_site"
    function_check nginx_limits
    nginx_limits "$ETHERPAD_DOMAIN_NAME" '15m'
    { echo "    proxy_pass        http://localhost:${ETHERPAD_PORT}/;";
      echo "    proxy_set_header  Host \$host;";
      echo '    proxy_buffering   off;';
      echo '  }';
      echo '}'; } >> "$etherpad_nginx_site"

    function_check create_site_certificate
    create_site_certificate "$ETHERPAD_DOMAIN_NAME" 'yes'

    if [ -f "/etc/ssl/certs/${ETHERPAD_DOMAIN_NAME}.crt" ]; then
        # shellcheck disable=SC2086
        mv /etc/ssl/certs/${ETHERPAD_DOMAIN_NAME}.crt /etc/ssl/certs/${ETHERPAD_DOMAIN_NAME}.pem
    fi
    if [ -f "/etc/ssl/certs/${ETHERPAD_DOMAIN_NAME}.pem" ]; then
        chown etherpad: "/etc/ssl/certs/${ETHERPAD_DOMAIN_NAME}.pem"
    fi
    if [ -f "/etc/ssl/private/${ETHERPAD_DOMAIN_NAME}.key" ]; then
        chown etherpad: "/etc/ssl/private/${ETHERPAD_DOMAIN_NAME}.key"
    fi
    usermod -a -G ssl-cert etherpad

    # Ensure that the database gets backed up locally, if remote
    # backups are not being used
    function_check backup_databases_script_header
    backup_databases_script_header

    function_check backup_database_local
    backup_database_local etherpad

    function_check nginx_ensite
    nginx_ensite "$ETHERPAD_DOMAIN_NAME"

    ETHERPAD_ONION_HOSTNAME=$(add_onion_service etherpad 80 ${ETHERPAD_ONION_PORT})

    "${PROJECT_NAME}-pass" -u "$MY_USERNAME" -a etherpad -p "$ETHERPAD_ADMIN_PASSWORD"

    function_check add_ddns_domain
    add_ddns_domain "$ETHERPAD_DOMAIN_NAME"

    set_completion_param "etherpad domain" "$ETHERPAD_DOMAIN_NAME"

    systemctl restart mariadb
    systemctl enable etherpad
    systemctl daemon-reload
    systemctl start etherpad
    systemctl restart nginx

    APP_INSTALLED=1
}