#!/bin/bash
#
#  _____               _           _
# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
#
#                              Freedom in the Cloud
#
# etesync server
# https://github.com/victor-rds/docker-etesync/blob/master/Dockerfile_debian.template
#
# License
# =======
#
# Copyright (C) 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'

APP_CATEGORY=sync

IN_DEFAULT_INSTALL=0
INSTALLED_ON_DEFAULT_DOMAIN=0
SHOW_ON_ABOUT=1

# whether to show the domain name in the web UI
SHOW_DOMAIN_IN_WEBADMIN=1
NOT_ON_API=0
NOT_ON_HOMEPAGE=1

ETESYNC_DOMAIN_NAME=
ETESYNC_CODE=
ETESYNC_PATH=/etc/etesync
ETESYNC_DATA_PATH=/etesync_data
ETESYNC_ONION_PORT=9860
ETESYNC_REPO="https://github.com/etesync/server-skeleton"
ETESYNC_COMMIT='8f50a69b39bef7f421590e3de26b822df0ceaf6e'
ETESYNC_PORT_INTERNAL=8292

# These parameters are used by the FreedomBox mobile app and web UI
ETESYNC_SHORT_DESCRIPTION='End-to-end encrypted sync of calendar and contacts between devices'
ETESYNC_DESCRIPTION='Secure, end-to-end encrypted and journaled personal information cloud synchronization for Android and the desktop, supporting contacts and calendars'
ETESYNC_MOBILE_APP_URL='https://f-droid.org/en/packages/com.etesync.syncadapter/'

etesync_variables=(ONION_ONLY
                   ETESYNC_DOMAIN_NAME
                   ETESYNC_CODE
                   DDNS_PROVIDER
                   MY_EMAIL_ADDRESS
                   MY_USERNAME)

function logging_on_etesync {
    echo -n ''
}

function logging_off_etesync {
    echo -n ''
}

function remove_user_etesync {
    remove_username="$1"

    cd "${ETESYNC_PATH}" || exit 72452422

    echo "from django.contrib.auth.models import User; u = User.objects.get(username='$remove_username'); u.delete();" | python3 manage.py shell

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

function add_user_etesync {
    new_username="$1"
    new_user_password="$2"

    cd "${ETESYNC_PATH}" || exit 53573582

    echo "from django.contrib.auth.models import User; u = User.objects.create_user('$new_username', '${new_username}@$(hostname)', '$new_user_password'); u.save();" | python3 manage.py shell

    "${PROJECT_NAME}-pass" -u "$new_username" -a etesync -p "$new_user_password"
    echo '0'
}

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

    if [[ "$ONION_ONLY" != "no" ]]; then
        ETESYNC_DOMAIN_NAME='etesync.local'
        write_config_param "ETESYNC_DOMAIN_NAME" "$ETESYNC_DOMAIN_NAME"
    else
        interactive_site_details "etesync" "ETESYNC_DOMAIN_NAME" "ETESYNC_CODE"
    fi
    APP_INSTALLED=1
}

function change_password_etesync {
    curr_username="$1"
    new_user_password="$2"

    cd "${ETESYNC_PATH}" || exit 3463754637

    echo "from django.contrib.auth.models import User; u = User.objects.get(username='$curr_username'); u.set_password('$new_user_password'); u.save();" | python3 manage.py shell

    "${PROJECT_NAME}-pass" -u "$curr_username" -a etesync -p "$new_user_password"
}

function reconfigure_etesync {
    # This is used if you need to switch identity. Dump old keys and generate new ones
    echo -n ''
}

function configure_interactive_etesync {
    W=(1 $"Option 1"
       2 $"Option 2")

    while true
    do
        # shellcheck disable=SC2068
        selection=$(dialog --backtitle $"Freedombone Administrator Control Panel" --title $"etesync" --menu $"Choose an operation, or ESC for main menu:" 14 70 3 "${W[@]}" 3>&2 2>&1 1>&3)

        if [ ! "$selection" ]; then
            break
        fi
        case $selection in
            1) # call some function for option 1
            ;;
            2) # call some function for option 2
            ;;
        esac
    done
}

function upgrade_etesync {
    CURR_ETESYNC_COMMIT=$(get_completion_param "etesync commit")
    if [[ "$CURR_ETESYNC_COMMIT" == "$ETESYNC_COMMIT" ]]; then
        return
    fi

    if grep -q "etesync domain" "$COMPLETION_FILE"; then
        ETESYNC_DOMAIN_NAME=$(get_completion_param "etesync domain")
    fi

    # update to the next commit
    set_repo_commit "${ETESYNC_PATH}" "etesync commit" "$ETESYNC_COMMIT" "$ETESYNC_REPO"
    cd "${ETESYNC_PATH}" || exit 368252
    pip3 install -U -r requirements.txt uwsgi
    python3 manage.py migrate
    chown -R etesync:etesync "${ETESYNC_PATH}"
    chown -R www-data:www-data "/var/www/$ETESYNC_DOMAIN_NAME/htdocs"
    systemctl restart etesync
}

function backup_local_etesync {
    ETESYNC_DOMAIN_NAME='etesync'
    if grep -q "etesync domain" "$COMPLETION_FILE"; then
        ETESYNC_DOMAIN_NAME=$(get_completion_param "etesync domain")
    fi

    suspend_site "${ETESYNC_DOMAIN_NAME}"

    systemctl stop etesync

    source_directory="${ETESYNC_DATA_PATH}"
    dest_directory=etesyncdata
    backup_directory_to_usb "$source_directory" $dest_directory

    source_directory="${ETESYNC_PATH}"
    dest_directory=etesync
    backup_directory_to_usb "$source_directory" $dest_directory

    source_directory="/var/www/$ETESYNC_DOMAIN_NAME/htdocs"
    dest_directory=etesyncstatic
    backup_directory_to_usb "$source_directory" $dest_directory

    restart_site
    systemctl start etesync
}

function restore_local_etesync {
    if ! grep -q "etesync domain" "$COMPLETION_FILE"; then
        return
    fi
    ETESYNC_DOMAIN_NAME=$(get_completion_param "etesync domain")
    if [ ! "$ETESYNC_DOMAIN_NAME" ]; then
        return
    fi
    suspend_site "${ETESYNC_DOMAIN_NAME}"
    systemctl stop etesync

    temp_restore_dir=/root/tempetesyncdata
    etesync_dir="${ETESYNC_DATA_PATH}"

    restore_directory_from_usb $temp_restore_dir etesync
    if [ -d $temp_restore_dir ]; then
        if [ -d "$temp_restore_dir$etesync_dir" ]; then
            cp -rp "$temp_restore_dir$etesync_dir"/* "$etesync_dir"/
        else
            if [ ! -d "$etesync_dir" ]; then
                mkdir "$etesync_dir"
            fi
            cp -rp "$temp_restore_dir"/* "$etesync_dir"/
        fi
        chown -R etesync:etesync "$etesync_dir"
        rm -rf $temp_restore_dir
    fi

    temp_restore_dir=/root/tempetesync
    etesync_dir="${ETESYNC_PATH}"

    restore_directory_from_usb $temp_restore_dir etesync
    if [ -d $temp_restore_dir ]; then
        if [ -d "$temp_restore_dir$etesync_dir" ]; then
            cp -rp "$temp_restore_dir$etesync_dir"/* "$etesync_dir"/
        else
            if [ ! -d "$etesync_dir" ]; then
                mkdir "$etesync_dir"
            fi
            cp -rp "$temp_restore_dir"/* "$etesync_dir"/
        fi
        chown -R etesync:etesync "$etesync_dir"
        rm -rf $temp_restore_dir
    fi

    temp_restore_dir=/root/tempetesyncstatic
    etesync_dir="/var/www/$ETESYNC_DOMAIN_NAME/htdocs"

    restore_directory_from_usb $temp_restore_dir etesync
    if [ -d $temp_restore_dir ]; then
        if [ -d "$temp_restore_dir$etesync_dir" ]; then
            cp -rp "$temp_restore_dir$etesync_dir"/* "$etesync_dir"/
        else
            if [ ! -d "$etesync_dir" ]; then
                mkdir "$etesync_dir"
            fi
            cp -rp "$temp_restore_dir"/* "$etesync_dir"/
        fi
        chown -R www-data:www-data "$etesync_dir"
        rm -rf $temp_restore_dir
    fi

    systemctl start etesync

    restart_site
}

function backup_remote_etesync {
    echo -n ''
}

function restore_remote_etesync {
    echo -n ''
}

function remove_etesync {
    nginx_dissite "$ETESYNC_DOMAIN_NAME"
    remove_certs "$ETESYNC_DOMAIN_NAME"

    if [ -f /etc/systemd/system/etesync.service ]; then
        systemctl stop etesync
        systemctl disable etesync
        rm /etc/systemd/system/etesync.service
    fi
    userdel -r etesync

    if [ -d "/var/www/$ETESYNC_DOMAIN_NAME" ]; then
        rm -rf "/var/www/$ETESYNC_DOMAIN_NAME"
    fi
    if [ -f "/etc/nginx/sites-available/$ETESYNC_DOMAIN_NAME" ]; then
        rm "/etc/nginx/sites-available/$ETESYNC_DOMAIN_NAME"
    fi
    remove_onion_service etesync "${ETESYNC_ONION_PORT}"
    if grep -q "etesync" /etc/crontab; then
        sed -i "/etesync/d" /etc/crontab
    fi
    remove_app etesync
    remove_completion_param install_etesync
    sed -i '/etesync/d' "$COMPLETION_FILE"

    remove_ddns_domain "$ETESYNC_DOMAIN_NAME"
}

function install_etesync {
    if [ ! "$ETESYNC_DOMAIN_NAME" ]; then
        echo $'No domain name was given'
        exit 3568356
    fi

    increment_app_install_progress

    $INSTALL_PACKAGES coreutils \
            curl file gcc git libevent-2.0-5 \
            libevent-dev libffi-dev libffi6 \
            libgnutls28-dev libjpeg62-turbo \
            libjpeg62-turbo-dev libldap-2.4-2 \
            libldap2-dev libsasl2-dev \
            libsqlite3-dev libssl-dev \
            libssl1.1 libtool libxml2 \
            libxml2-dev libxslt1-dev libxslt1.1 \
            make python3 python3-dev \
            python3-pip python3-psycopg2 \
            python3-virtualenv sqlite unzip \
            zlib1g zlib1g-dev

    increment_app_install_progress

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

    increment_app_install_progress

    if [ -d "/var/www/$ETESYNC_DOMAIN_NAME/htdocs" ]; then
        rm -rf "/var/www/$ETESYNC_DOMAIN_NAME/htdocs"
    fi
    if [ -d "${ETESYNC_PATH}" ]; then
        rm -rf "${ETESYNC_PATH}"
    fi
    mkdir "/var/www/$ETESYNC_DOMAIN_NAME"
    if [ -d /repos/etesync ]; then
        mkdir -p "/var/www/$ETESYNC_DOMAIN_NAME/htdocs"
        cp -r -p /repos/etesync/. "${ETESYNC_PATH}"
        cd "${ETESYNC_PATH}" || exit 36487365
        git pull
    else
        mkdir -p "/var/www/$ETESYNC_DOMAIN_NAME/htdocs"
        git_clone "$ETESYNC_REPO" "${ETESYNC_PATH}"
    fi

    increment_app_install_progress

    if [ ! -d "${ETESYNC_PATH}" ]; then
        echo $'Unable to clone etesync repo'
        exit 87525
    fi

    cd "${ETESYNC_PATH}" || exit 3463754637
    git checkout "$ETESYNC_COMMIT" -b "$ETESYNC_COMMIT"

    if [ ! -f "${ETESYNC_PATH}/requirements.txt" ]; then
        echo $'requirements.txt not found'
        exit 56385638
    fi

    set_completion_param "etesync commit" "$ETESYNC_COMMIT"

    chmod g+w "/var/www/$ETESYNC_DOMAIN_NAME/htdocs"
    chown -R www-data:www-data "/var/www/$ETESYNC_DOMAIN_NAME/htdocs"

    add_ddns_domain "$ETESYNC_DOMAIN_NAME"

    increment_app_install_progress

    ETESYNC_ONION_HOSTNAME=$(add_onion_service etesync 80 "${ETESYNC_ONION_PORT}")

    increment_app_install_progress

    sed -i "s|ALLOWED_HOSTS =.*|ALLOWED_HOSTS = [ 'localhost', '${ETESYNC_DOMAIN_NAME}', '${ETESYNC_ONION_HOSTNAME}' ]|g" "${ETESYNC_PATH}/etesync_server/settings.py"

    sed -i "s|STATIC_ROOT =.*|STATIC_ROOT = os.environ.get('DJANGO_STATICS','/var/www/$ETESYNC_DOMAIN_NAME/htdocs/')|g" "${ETESYNC_PATH}/etesync_server/settings.py"

    pip3 install -r requirements.txt uwsgi

    increment_app_install_progress

    python3 manage.py migrate

    increment_app_install_progress

    # place to store data
    if [ ! -d "${ETESYNC_DATA_PATH}" ]; then
        mkdir "${ETESYNC_DATA_PATH}"
    fi

    etesync_nginx_site=/etc/nginx/sites-available/$ETESYNC_DOMAIN_NAME
    if [[ "$ONION_ONLY" == "no" ]]; then
        nginx_http_redirect "$ETESYNC_DOMAIN_NAME" "index index.html"
        { echo 'server {';
          echo '    listen 443 ssl;';
          echo '    #listen [::]:443 ssl;';
          echo "    server_name $ETESYNC_DOMAIN_NAME;";
          echo '';
          echo '    access_log /dev/null;';
          echo '    error_log /dev/null;';
          echo '';
          echo '    charset     utf-8;';
          echo '';
          echo '    client_max_body_size 75M;';
          echo '    location / {';
          echo "        proxy_pass  http://localhost:${ETESYNC_PORT_INTERNAL};";
          echo '    }';
          echo '';
          echo '    location /static {';
          echo "        alias /var/www/$ETESYNC_DOMAIN_NAME/htdocs;";
          echo '    }';
          echo '';
          echo '    # Security'; } >> "$etesync_nginx_site"

        nginx_ssl "$ETESYNC_DOMAIN_NAME"

        nginx_security_options "$ETESYNC_DOMAIN_NAME"

        { echo '    add_header Strict-Transport-Security max-age=15768000;';
          echo '}'; } >> "$etesync_nginx_site"
    else
        echo -n '' > "$etesync_nginx_site"
    fi
    { echo 'server {';
      echo "    listen 127.0.0.1:$ETESYNC_ONION_PORT default_server;";
      echo "    server_name $ETESYNC_ONION_HOSTNAME;";
      echo '';
      echo '    access_log /dev/null;';
      echo '    error_log /dev/null;';
      echo '';
      echo '    charset     utf-8;';
      echo '';
      echo '    client_max_body_size 75M;';
      echo '    location / {';
      echo "        proxy_pass  http://localhost:${ETESYNC_PORT_INTERNAL};";
      echo '    }';
      echo '';
      echo '    location /static {';
      echo "        alias /var/www/$ETESYNC_DOMAIN_NAME/htdocs;";
      echo '    }';
      echo '}'; } >> "$etesync_nginx_site"

    increment_app_install_progress

    groupadd -r etesync
    useradd -d "$ETESYNC_PATH" -r -M -s /bin/sh -g etesync etesync

    increment_app_install_progress

    { echo '[Unit]';
      echo 'Description=etesync';
      echo 'After=syslog.target';
      echo 'After=network.target';
      echo "Documentation=$ETESYNC_REPO";
      echo '';
      echo '[Service]';
      echo 'Type=simple';
      echo 'User=etesync';
      echo 'Group=etesync';
      echo "WorkingDirectory=${ETESYNC_PATH}";
      echo "ExecStart=/usr/bin/python3 ${ETESYNC_PATH}/manage.py runserver localhost:${ETESYNC_PORT_INTERNAL}";
      echo 'Environment=USER=etesync';
      echo "Environment=ETESYNC_PATH=${ETESYNC_PATH}";
      echo "Environment=ENV DATA_PATH=${ETESYNC_DATA_PATH}";
      echo "Environment=DJANGO_STATICS=/var/www/$ETESYNC_DOMAIN_NAME/htdocs";
      echo "Environment=DJANGO_PORT=${ETESYNC_PORT_INTERNAL}";
      echo 'Environment=SERVER="standalone"';
      echo 'Restart=always';
      echo 'StandardError=syslog';
      echo '';
      echo '[Install]';
      echo 'WantedBy=multi-user.target'; } > "/etc/systemd/system/etesync.service"
    systemctl enable etesync
    chown -R etesync:etesync "${ETESYNC_PATH}"
    systemctl start etesync

    increment_app_install_progress

    create_site_certificate "$ETESYNC_DOMAIN_NAME" 'yes'

    increment_app_install_progress

    nginx_ensite "$ETESYNC_DOMAIN_NAME"

    systemctl restart nginx

    pip3 install psycopg2-binary

    increment_app_install_progress

    cd "${ETESYNC_PATH}" || exit 3463754637

    python3 "${ETESYNC_PATH}/manage.py" collectstatic --no-input
    chown -R www-data:www-data "/var/www/$ETESYNC_DOMAIN_NAME/htdocs"

    increment_app_install_progress

    chown -R etesync:etesync "$ETESYNC_DATA_PATH"

    echo "from django.contrib.auth.models import User; User.objects.create_superuser('$MY_USERNAME', '$MY_EMAIL_ADDRESS', '$ETESYNC_ADMIN_PASSWORD')" | python3 manage.py shell

    increment_app_install_progress

    "${PROJECT_NAME}-pass" -u "$MY_USERNAME" -a etesync -p "$ETESYNC_ADMIN_PASSWORD"
    set_completion_param "etesync domain" "$ETESYNC_DOMAIN_NAME"

    APP_INSTALLED=1
}

# NOTE: deliberately there is no "exit 0"