#!/bin/bash
#  _____               _           _
# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
#
#                              Freedom in the Cloud
#
# Radicale calendar system
#
# Configuration based upon:
#   https://gigacog.com/blog/2016/01/radicale-and-uwsgi-on-nginx-with-systemd
#
# 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=''

IN_DEFAULT_INSTALL=0
SHOW_ON_ABOUT=1

RADICALE_DOWNLOAD_URL='https://files.pythonhosted.org/packages/source/R/Radicale/Radicale-'
RADICALE_VERSION='1.1.2'
RADICALE_HASH='ebe22afb7fdcac45a5722a5b3037cc4bf261fc059beba31af7863894d2b840bc'
RADICALE_PASSWORD=
RADICALE_ONION_PORT=8106
RADICALE_PORT=5232
RADICALE_DIRECTORY='/etc/radicale'
RADICALE_USERS=/var/www/radicale/users

radicale_variables=(ONION_ONLY
                    MY_USERNAME
                    RADICALE_PASSWORD
                    DEFAULT_DOMAIN_NAME)

function logging_on_radicale {
    echo -n ''
}

function logging_off_radicale {
    echo -n ''
}

function remove_user_radicale {
    remove_username="$1"

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

    if grep -q "${remove_username}:" ${RADICALE_USERS}; then
        sed -i "/${remove_username}:/d" ${RADICALE_USERS}
        if [ -d "/var/www/radicale/collections/${remove_username}" ]; then
            rm -rf "/var/www/radicale/collections/${remove_username}"
        fi
        if [ -f "/var/www/radicale/collections/${remove_username}.props" ]; then
            rm "/var/www/radicale/collections/${remove_username}.props"
        fi
        systemctl restart radicale
    fi
}

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

    "${PROJECT_NAME}-pass" -u "$new_username" -a radicale -p "$new_user_password"

    if [ ! -f ${RADICALE_USERS} ]; then
        touch ${RADICALE_USERS}
    fi

    if ! grep -q "$new_username:" ${RADICALE_USERS}; then
        htpasswd -bd ${RADICALE_USERS} "$new_username" "$new_user_password"

        echo '{"ICAL:calendar-color": "#9e50df"}' > "/var/www/radicale/collections/${new_username}.props"
        mkdir "/var/www/radicale/collections/${new_username}"
        echo '{"ICAL:calendar-color": "#de631a", "tag": "VCALENDAR"}' > "/var/www/radicale/collections/${new_username}/calendar.props"
        { echo 'BEGIN:VCALENDAR';
          echo 'PRODID:-//Radicale//NONSGML Radicale Server//EN';
          echo 'VERSION:2.0';
          echo 'END:VCALENDAR'; } >> "/var/www/radicale/collections/${new_username}/calendar"

        chown -R www-data:www-data /var/www/radicale
        chmod -R 755 /var/www/radicale/*
        systemctl restart radicale
    fi
    echo '0'
}

function change_password_radicale {
    existing_username="$1"
    new_user_password="$2"

    "${PROJECT_NAME}-pass" -u "$existing_username" -a radicale -p "$new_user_password"

    if grep -q "${existing_username}:" ${RADICALE_USERS}; then
        sed -i "/${existing_username}:/d" ${RADICALE_USERS}
        htpasswd -bd ${RADICALE_USERS} "$existing_username" "$new_user_password"
        systemctl reload radicale
    fi
}

function install_interactive_radicale {
    echo -n ''
    APP_INSTALLED=1
}

function reconfigure_radicale {
    rm $RADICALE_USERS
    rm -rf /var/www/radicale/collections/*
    rm -rf /var/log/radicale/*

    # create an admin password
    if [ -f "$IMAGE_PASSWORD_FILE" ]; then
        RADICALE_PASSWORD="$(printf "%s" "$(cat "$IMAGE_PASSWORD_FILE")")"
    else
        RADICALE_PASSWORD="$(create_password "${MINIMUM_PASSWORD_LENGTH}")"
    fi
    add_user_radicale "$MY_USERNAME" "$RADICALE_PASSWORD"

    "${PROJECT_NAME}-pass" -u "$MY_USERNAME" -a radicale -p "$RADICALE_PASSWORD"

    touch /var/log/radicale/radicale.log
    chown -R www-data:www-data /var/log/radicale
}

function upgrade_radicale {
    if [ ! -f /usr/local/bin/radicale ]; then
        return
    fi

    if ! grep -q "radicale version:" "$COMPLETION_FILE"; then
        return
    fi

    CURR_RADICALE_VERSION=$(get_completion_param "radicale version")
    if [[ "${CURR_RADICALE_VERSION}" == "${RADICALE_VERSION}" ]]; then
        return
    fi

    # get the source
    cd /var/www/radicale || exit 62784628468
    wget ${RADICALE_DOWNLOAD_URL}${RADICALE_VERSION}.tar.gz

    # check the hash
    hash=$(sha256sum Radicale-${RADICALE_VERSION}.tar.gz | awk -F ' ' '{print $1}')
    if [[ "$hash" != "$RADICALE_HASH" ]]; then
        echo $'radicale hash does not match'
        exit 638532
    fi

    tar -xzf Radicale-${RADICALE_VERSION}.tar.gz
    if [ ! -d Radicale-${RADICALE_VERSION} ]; then
        exit 73529
    fi
    rm Radicale-${RADICALE_VERSION}.tar.gz
    cd "Radicale-${RADICALE_VERSION}" || exit 264824684

    # move the old command
    mv /usr/local/bin/radicale /usr/local/bin/radicale_previous

    # do the install
    python setup.py install

    # check for install success
    if [ ! -f /usr/local/bin/radicale ]; then
        mv /usr/local/bin/radicale_previous /usr/local/bin/radicale
        echo $'Radicale did not upgrade'
        exit 692353
    fi

    # remove the old source
    rm -rf "Radicale-${CURR_RADICALE_VERSION}" || exit 6842684282

    sed -i "s|radicale version.*|radicale version:$RADICALE_VERSION|g" "${COMPLETION_FILE}"
    chown -R www-data:www-data /var/www/radicale
    systemctl restart radicale
    systemctl restart nginx
}

function backup_local_radicale {
    source_directory=${RADICALE_DIRECTORY}
    if [ -d $source_directory ]; then
        dest_directory=radicale
        function_check backup_directory_to_usb
        backup_directory_to_usb $source_directory $dest_directory
    fi
    source_directory=/var/www/radicale
    if [ -d $source_directory ]; then
        dest_directory=radicalewww
        function_check backup_directory_to_usb
        backup_directory_to_usb $source_directory $dest_directory
    fi
}

function restore_local_radicale {
    if [ -d ${RADICALE_DIRECTORY} ]; then
        temp_restore_dir=/root/tempradicale
        function_check restore_directory_from_usb
        restore_directory_from_usb $temp_restore_dir radicale
        if [ -d $temp_restore_dir${RADICALE_DIRECTORY} ]; then
            cp -r $temp_restore_dir${RADICALE_DIRECTORY}/* ${RADICALE_DIRECTORY}
        else
            cp -r $temp_restore_dir/* ${RADICALE_DIRECTORY}/
        fi
        # shellcheck disable=SC2181
        if [ ! "$?" = "0" ]; then
            function_check backup_unmount_drive
            backup_unmount_drive
            exit 46872
        fi
        rm -rf $temp_restore_dir

        temp_restore_dir=/root/tempradicalewww
        restore_directory_from_usb $temp_restore_dir radicalewww
        if [ -d $temp_restore_dir/var/www/radicale ]; then
            cp -r $temp_restore_dir/var/www/radicale/* /var/www/radicale
        else
            cp -r $temp_restore_dir/* /var/www/radicale/*
        fi
        # shellcheck disable=SC2181
        if [ ! "$?" = "0" ]; then
            function_check backup_unmount_drive
            backup_unmount_drive
            exit 367363
        fi
        rm -rf $temp_restore_dir
        chown -R www-data:www-data /var/www/radicale

        systemctl restart radicale
    fi
}

function backup_remote_radicale {
    if [ -d ${RADICALE_DIRECTORY} ]; then
        echo $"Backing up the radicale settings"
        backup_directory_to_friend ${RADICALE_DIRECTORY} radicale
        backup_directory_to_friend /var/www/radicale radicalewww
        echo $"Backup of radicale settings complete"
    fi
}

function restore_remote_radicale {
    if [ -d ${RADICALE_DIRECTORY} ]; then
        temp_restore_dir=/root/tempradicale
        function_check restore_directory_from_friend
        restore_directory_from_friend $temp_restore_dir radicale
        if [ -d $temp_restore_dir${RADICALE_DIRECTORY} ]; then
            cp -r $temp_restore_dir${RADICALE_DIRECTORY}/* ${RADICALE_DIRECTORY}
        else
            cp -r $temp_restore_dir/* ${RADICALE_DIRECTORY}/
        fi
        # shellcheck disable=SC2181
        if [ ! "$?" = "0" ]; then
            exit 236746
        fi
        rm -rf $temp_restore_dir

        temp_restore_dir=/root/tempradicalewww
        restore_directory_from_friend $temp_restore_dir radicalewww
        if [ -d $temp_restore_dir/var/www/radicale ]; then
            cp -r $temp_restore_dir/var/www/radicale/* /var/www/radicale
        else
            cp -r $temp_restore_dir/* /var/www/radicale
        fi
        # shellcheck disable=SC2181
        if [ ! "$?" = "0" ]; then
            exit 3674284
        fi
        rm -rf $temp_restore_dir
        chown -R www-data:www-data /var/www/radicale

        systemctl restart radicale
    fi
}

function remove_radicale {
    nginx_dissite radicale
    systemctl stop radicale
    systemctl stop uwsgi_rundir
    systemctl disable radicale
    systemctl disable uwsgi_rundir
    if [ -f /etc/systemd/system/uwsgi_rundir.service ]; then
        rm /etc/systemd/system/uwsgi_rundir.service
    fi
    if [ -f /etc/systemd/system/radicale.service ]; then
        rm /etc/systemd/system/radicale.service
    fi
    systemctl daemon-reload
    if [ -f /etc/nginx/sites-available/radicale ]; then
        rm /etc/nginx/sites-available/radicale
    fi
    if [ -f /usr/local/bin/uwsgi_rundir.sh ]; then
        rm /usr/local/bin/uwsgi_rundir.sh
    fi

    firewall_remove ${RADICALE_PORT} tcp

    groupdel -f radicale
    userdel -r radicale

    function_check remove_onion_service
    remove_onion_service radicale ${RADICALE_ONION_PORT}

    apt-get -yq remove --purge radicale python-radicale
    if [ -d ${RADICALE_DIRECTORY} ]; then
        rm -rf ${RADICALE_DIRECTORY}
    fi
    if [ -d /var/www/radicale ]; then
        rm -rf /var/www/radicale
    fi
    if [ -f /var/log/radicale/radicale.log ]; then
        rm -rf /var/log/radicale
    fi
    if [ -d /var/log/radicale ]; then
        rm -rf /var/log/radicale
    fi
    if [ -d /var/lib/radicale ]; then
        rm -rf /var/lib/radicale
    fi

    remove_completion_param install_radicale
    sed -i '/radicale/d' "$COMPLETION_FILE"
    sed -i '/# Start radicale/,/# End radicale/d' "/etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}"
    systemctl restart nginx
}

function install_radicale {
    if [[ $ONION_ONLY == 'no' ]]; then
        # obtain a cert for the default domain
        if [[ "$(cert_exists "${DEFAULT_DOMAIN_NAME}" pem)" == "0" ]]; then
            echo $'Obtaining certificate for the main domain'
            create_site_certificate "${DEFAULT_DOMAIN_NAME}" 'yes'
        fi
    fi

    apt-get -yq remove --purge radicale python-radicale

    useradd -c "Radicale system account" -d /var/www/radicale -m -r -g radicale radicale
    usermod -a -G www-data radicale
    groupadd radicale

    # create directories
    if [ ! -d /var/log/radicale ]; then
        mkdir /var/log/radicale
    fi
    if [ ! -f /var/log/radicale/radicale.log ]; then
        touch /var/log/radicale/radicale.log
    fi
    chown -R www-data:www-data /var/log/radicale

    apt-get -yq install python-setuptools apache2-utils

    if [ ! -d /var/www/radicale ]; then
        mkdir -p /var/www/radicale
    fi

    # get the source
    cd /var/www/radicale || exit 462874628
    wget ${RADICALE_DOWNLOAD_URL}${RADICALE_VERSION}.tar.gz

    # check the hash
    hash=$(sha256sum Radicale-${RADICALE_VERSION}.tar.gz | awk -F ' ' '{print $1}')
    if [[ "$hash" != "$RADICALE_HASH" ]]; then
        echo $'radicale hash does not match'
        exit 638532
    fi

    tar -xzf Radicale-${RADICALE_VERSION}.tar.gz
    if [ ! -d Radicale-${RADICALE_VERSION} ]; then
        exit 623252
    fi
    rm Radicale-${RADICALE_VERSION}.tar.gz
    cd "Radicale-${RADICALE_VERSION}" || exit 872462842
    python setup.py install
    if [ ! -f /usr/local/bin/radicale ]; then
        echo $'Radicale did not install'
        exit 7283554
    fi

    if [ ! -d ${RADICALE_DIRECTORY} ]; then
        mkdir ${RADICALE_DIRECTORY}
    fi
    if [ ! -d /var/www/radicale/collections ]; then
        mkdir -p /var/www/radicale/collections
    fi

    # create the configuration
    { echo '[server]';
      echo 'hosts=localhost:52322';
      echo 'ssl = False';
      echo 'daemon = False';
      echo 'base_prefix=/radicale/';
      echo '';
      echo '[storage]';
      echo 'type = filesystem';
      echo "filesystem_folder = /var/www/radicale/collections";
      echo '';
      echo '[well-known]';
      echo "caldav = '/%(user)s/caldav/'";
      echo "carddav = '/%(user)s/carddav/'";
      echo '';
      echo '#[auth]';
      echo '#imap_hostname = localhost';
      echo '#imap_port = 143';
      echo '#imap_ssl = False';
      echo '';
      echo '[logging]';
      echo 'debug = False'; } > "${RADICALE_DIRECTORY}/config"

    # create an admin password
    if [ ${#RADICALE_PASSWORD} -lt 8 ]; then
        if [ -f "$IMAGE_PASSWORD_FILE" ]; then
            RADICALE_PASSWORD="$(printf "%s" "$(cat "$IMAGE_PASSWORD_FILE")")"
        else
            RADICALE_PASSWORD="$(create_password "${MINIMUM_PASSWORD_LENGTH}")"
        fi
    fi
    add_user_radicale "$MY_USERNAME" "$RADICALE_PASSWORD"

    { echo '[Unit]';
      echo 'Description=Radicale CalDAV Server';
      echo 'After=network.target';
      echo '';
      echo '[Service]';
      echo 'Type=simple';
      echo 'User=www-data';
      echo 'Group=www-data';
      echo "ExecStart=/usr/local/bin/radicale --config ${RADICALE_DIRECTORY}/config";
      echo 'Restart=on-failure';
      echo 'RestartSec=10';
      echo '';
      echo '[Install]';
      echo 'WantedBy=multi-user.target'; } > /etc/systemd/system/radicale.service

    addresses_str=$"Addresses"
    echo "{\"tag\": \"VADDRESSBOOK\", \"D:displayname\": \"${addresses_str}\"}" > /var/www/radicale/collections/addresses.props
    touch /var/www/radicale/collections/addresses

    if [ ! -d /var/lib/radicale ]; then
        mkdir /var/lib/radicale
    fi
    chown radicale:radicale /var/lib/radicale

    chown -R www-data:www-data /var/www/radicale
    chmod -R 755 /var/www/radicale
    chown -R www-data:www-data ${RADICALE_DIRECTORY}

    systemctl enable radicale
    systemctl start radicale

    if [ ! -f "/etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}" ]; then
        # create a new site config
        RADICALE_ONION_HOSTNAME=$(add_onion_service radicale 80 ${RADICALE_ONION_PORT})

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

              echo '';
              echo '    access_log /dev/null;';
              echo '    error_log /dev/null;';
              echo '';
              echo '    # Start radicale';
              echo '    location @radicale {';
              echo '        auth_basic "Radicale";';
              echo '        auth_basic_user_file /var/www/radicale/users;';
              echo '        proxy_pass http://localhost:52322;';
              echo '        proxy_buffering off;';
              echo "        proxy_set_header Host \$host;";
              echo "        proxy_set_header X-Real-IP \$remote_addr;";
              echo "        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;";
              echo "        proxy_set_header X-Forwarded-Proto \$scheme;";
              echo '    }';
              echo '';
              echo '    location /radicale {';
              echo "        try_files \$uri @radicale;";
              echo '    }';
              echo '';
              echo '    location /.well-known/carddav {';
              echo "        try_files \$uri @radicale;";
              echo '    }';
              echo '';
              echo '    location /.well-known/caldav {';
              echo "        try_files \$uri @radicale;";
              echo '    }';
              echo '    # End radicale';
              echo '}';
              echo ''; } >> "/etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}"
        else
            echo -n '' > "/etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}"
        fi
        { echo 'server {';
          echo "    listen localhost:${RADICALE_ONION_PORT} default_server;";
          echo '';
          echo "    server_name ${RADICALE_ONION_HOSTNAME};";
          echo '';
          echo '    access_log /dev/null;';
          echo '    error_log /dev/null;';
          echo '';
          echo '    # Start radicale';
          echo '    location @radicale {';
          echo '        auth_basic "Radicale";';
          echo '        auth_basic_user_file /var/www/radicale/users;';
          echo '        proxy_pass http://localhost:52322;';
          echo '        proxy_buffering off;';
          echo "        proxy_set_header Host \$host;";
          echo "        proxy_set_header X-Real-IP \$remote_addr;";
          echo "        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;";
          echo "        proxy_set_header X-Forwarded-Proto \$scheme;";
          echo '    }';
          echo '';
          echo '    location /radicale {';
          echo "        try_files \$uri @radicale;";
          echo '    }';
          echo '';
          echo '    location /.well-known/carddav {';
          echo "        try_files \$uri @radicale;";
          echo '    }';
          echo '';
          echo '    location /.well-known/caldav {';
          echo "        try_files \$uri @radicale;";
          echo '    }';
          echo '    # End radicale';
          echo '}'; } >> "/etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}"

        set_completion_param "radicale onion domain" "${RADICALE_ONION_HOSTNAME}"
    else
        # alter the existing site config
        if ! grep -q "# Start radicale" "/etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}"; then
            sed -i "/]:443/a    # Start radicale\\n  location @radicale {\\n    auth_basic \"Radicale\";\\n    auth_basic_user_file \\/var\\/www\\/radicale\\/users;\\n    proxy_pass http:\\/\\/localhost:52322;\\n    proxy_buffering off;\\n    proxy_set_header Host \$host;\\n    proxy_set_header X-Real-IP \$remote_addr;\\n    proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;\\n    proxy_set_header X-Forwarded-Proto \$scheme;\\n  }\\n\\n  location \\/radicale {\\n      try_files \$uri @radicale;\\n  }\\n\\n  location \\/.well-known\\/carddav {\\n      try_files \$uri @radicale;\\n  }\\n\\n  location \\/.well-known\\/caldav {\\n      try_files \$uri @radicale;\\n  }\\n  # End radicale" "/etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}"
            sed -i "/listen localhost/a    # Start radicale\\n  location @radicale {\\n    auth_basic \"Radicale\";\\n    auth_basic_user_file \\/var\\/www\\/radicale\\/users;\\n    proxy_pass http:\\/\\/localhost:52322;\\n    proxy_buffering off;\\n    proxy_set_header Host \$host;\\n    proxy_set_header X-Real-IP \$remote_addr;\\n    proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;\\n    proxy_set_header X-Forwarded-Proto \$scheme;\\n  }\\n\\n  location \\/radicale {\\n      try_files \$uri @radicale;\\n  }\\n\\n  location \\/.well-known\\/carddav {\\n      try_files \$uri @radicale;\\n  }\\n\\n  location \\/.well-known\\/caldav {\\n      try_files \$uri @radicale;\\n  }\\n  # End radicale" "/etc/nginx/sites-available/${DEFAULT_DOMAIN_NAME}"
        fi
    fi

    # create a certificate
    if [ ! -f "/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.pem" ]; then
        if [ ! -f "/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.crt" ]; then
            "${PROJECT_NAME}-addcert" -h "$DEFAULT_DOMAIN_NAME" --dhkey "${DH_KEYLENGTH}"
            check_certificates "$DEFAULT_DOMAIN_NAME"
        fi
    fi

    if [ -f "/etc/ssl/certs/${DEFAULT_DOMAIN_NAME}.pem" ]; then
        sed -i "s|radicale.crt|${DEFAULT_DOMAIN_NAME}.pem|g" /etc/nginx/sites-available/radicale
        sed -i "s|radicale.pem|${DEFAULT_DOMAIN_NAME}.pem|g" /etc/nginx/sites-available/radicale
    fi
    sed -i "s|radicale.key|${DEFAULT_DOMAIN_NAME}.key|g" /etc/nginx/sites-available/radicale
    sed -i "s|radicale.dhparam|${DEFAULT_DOMAIN_NAME}.dhparam|g" /etc/nginx/sites-available/radicale

    update_default_domain

    systemctl restart nginx

    "${PROJECT_NAME}-pass" -u "$MY_USERNAME" -a radicale -p "$RADICALE_PASSWORD"

    # keep track of the version so we can check for upgrades
    if ! grep -q "radicale version:" "${COMPLETION_FILE}"; then
        echo "radicale version:${RADICALE_VERSION}" >> "${COMPLETION_FILE}"
    else
        sed -i "s|radicale version.*|radicale version:${RADICALE_VERSION}|g" "${COMPLETION_FILE}"
    fi

    APP_INSTALLED=1
}

# NOTE: deliberately no exit 0