#!/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 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'

IN_DEFAULT_INSTALL=1
SHOW_ON_ABOUT=1

RADICALE_PASSWORD=
RADICALE_ONION_PORT=8106
RADICALE_PORT=5232
RADICALE_DIRECTORY='/etc/radicale'

radicale_variables=(ONION_ONLY
                    MY_USERNAME
                    RADICALE_PASSWORD
                    DEFAULT_DOMAIN_NAME)

function remove_user_radicale {
    remove_username="$1"
    if grep "$remove_username:" ${RADICALE_DIRECTORY}/users; then
        sed -i "/$remove_username/d" ${RADICALE_DIRECTORY}/users
        systemctl reload radicale
    fi
}

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

    if ! grep "$new_username:$new_user_password" ${RADICALE_DIRECTORY}/users; then
        printf "$new_username:$new_user_password\n" >> ${RADICALE_DIRECTORY}/users
        systemctl reload radicale
    fi
    echo '0'
}

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

function change_password_radicale {
    echo -n ''
}

function reconfigure_radicale {
    echo -n ''
}

function upgrade_radicale {
    if [ -f /etc/init.d/radicale ]; then
        systemctl stop radicale
        rm /etc/init.d/radicale
        systemctl daemon-reload
        systemctl start radicale
    fi
}

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
}

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
        cp -r $temp_restore_dir${RADICALE_DIRECTORY}/* ${RADICALE_DIRECTORY}
        if [ ! "$?" = "0" ]; then
            function_check backup_unmount_drive
            backup_unmount_drive
            exit 46872
        fi
        rm -rf $temp_restore_dir
        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
        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
        cp -r $temp_restore_dir${RADICALE_DIRECTORY}/* ${RADICALE_DIRECTORY}
        if [ ! "$?" = "0" ]; then
            exit 463735
        fi
        rm -rf $temp_restore_dir
        systemctl restart radicale
    fi
}

function configure_firewall_for_radicale {
    if [ ! -d ${RADICALE_DIRECTORY} ]; then
        return
    fi
    if [[ $INSTALLED_WITHIN_DOCKER == "yes" ]]; then
        # docker does its own firewalling
        return
    fi
    if [[ $ONION_ONLY != "no" ]]; then
        return
    fi
    firewall_add radicale ${RADICALE_PORT} tcp
    mark_completed $FUNCNAME
}

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
    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

    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

    remove_completion_param install_radicale
    sed -i '/radicale/d' $COMPLETION_FILE
    sed -i '/Radicale/d' /home/$MY_USERNAME/README
}

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 install python-radicale uwsgi uwsgi-plugin-python radicale

    if [ ! -d ${RADICALE_DIRECTORY} ]; then
        echo $"ERROR: radicale does not appear to have installed"
        exit 46372
    fi
    systemctl stop radicale
    if [ -f /etc/init.d/radicale ]; then
        rm /etc/init.d/radicale
    fi

    if [ ! -d ${RADICALE_DIRECTORY}/collections ]; then
        mkdir -p ${RADICALE_DIRECTORY}/collections
    fi
    chown www-data:www-data ${RADICALE_DIRECTORY}/collections

    echo '[auth]' >  ${RADICALE_DIRECTORY}/config
    echo 'type = htpasswd' >> ${RADICALE_DIRECTORY}/config
    echo 'htpasswd_filename = ${RADICALE_DIRECTORY}/users' >> ${RADICALE_DIRECTORY}/config
    echo 'htpasswd_encryption = crypt' >> ${RADICALE_DIRECTORY}/config
    echo '' >> ${RADICALE_DIRECTORY}/config
    echo '[rights]' >> ${RADICALE_DIRECTORY}/config
    echo 'type = owner_only' >> ${RADICALE_DIRECTORY}/config
    echo '' >> ${RADICALE_DIRECTORY}/config
    echo '[storage]' >> ${RADICALE_DIRECTORY}/config
    echo 'type = filesystem' >> ${RADICALE_DIRECTORY}/config
    echo 'filesystem_folder = ${RADICALE_DIRECTORY}/collections' >> ${RADICALE_DIRECTORY}/config

    if [ ${#RADICALE_PASSWORD} -lt 8 ]; then
        if [ -f $IMAGE_PASSWORD_FILE ]; then
            RADICALE_PASSWORD="$(printf `cat $IMAGE_PASSWORD_FILE`)"
        else
            RADICALE_PASSWORD="$(create_password ${MINIMUM_PASSWORD_LENGTH})"
        fi
    fi
    add_user_radicale "$MY_USERNAME" "$RADICALE_PASSWORD"

    if [ ! -f /var/www/radicale ]; then
        mkdir /var/www/radicale
    fi
    echo 'import radicale' > /var/www/radicale/radicale.py
    echo 'radicale.log.start()' >> /var/www/radicale/radicale.py
    echo 'application = radicale.Application()' >> /var/www/radicale/radicale.py

    echo '[uwsgi]' > /var/www/radicale/uwsgi.ini
    echo 'plugins = python' >> /var/www/radicale/uwsgi.ini
    echo 'socket = /var/run/uwsgi/radicale.sock' >> /var/www/radicale/uwsgi.ini
    echo 'chmod-socket = 660' >> /var/www/radicale/uwsgi.ini
    echo '' >> /var/www/radicale/uwsgi.ini
    echo 'wsgi-file = /var/www/radicale/radicale.py' >> /var/www/radicale/uwsgi.ini
    echo 'master' >> /var/www/radicale/uwsgi.ini
    echo 'workers = 1' >> /var/www/radicale/uwsgi.ini
    echo 'max-requests = 100' >> /var/www/radicale/uwsgi.ini
    echo 'harakiri = 30' >> /var/www/radicale/uwsgi.ini
    echo 'die-on-term' >> /var/www/radicale/uwsgi.ini

    echo '#!/bin/sh' > /usr/local/bin/uwsgi_rundir.sh
    echo 'mkdir -p /var/run/uwsgi' >> /usr/local/bin/uwsgi_rundir.sh
    echo 'chown www-data:www-data /var/run/uwsgi' >> /usr/local/bin/uwsgi_rundir.sh
    chmod +x /usr/local/bin/uwsgi_rundir.sh

    echo '[Unit]' > /etc/systemd/system/uwsgi_rundir.service
    echo 'Description=UWSGI socket directory' >> /etc/systemd/system/uwsgi_rundir.service
    echo 'After=network.target' >> /etc/systemd/system/uwsgi_rundir.service
    echo '' >> /etc/systemd/system/uwsgi_rundir.service
    echo '[Service]' >> /etc/systemd/system/uwsgi_rundir.service
    echo 'Type=simple' >> /etc/systemd/system/uwsgi_rundir.service
    echo 'User=root' >> /etc/systemd/system/uwsgi_rundir.service
    echo 'ExecStart=/usr/local/bin/uwsgi_rundir.sh' >> /etc/systemd/system/uwsgi_rundir.service
    echo '' >> /etc/systemd/system/uwsgi_rundir.service
    echo '[Install]' >> /etc/systemd/system/uwsgi_rundir.service
    echo 'WantedBy=multi-user.target' >> /etc/systemd/system/uwsgi_rundir.service
    systemctl enable uwsgi_rundir

    echo '[Unit]' > /etc/systemd/system/radicale.service
    echo 'Description=Start uwsgi for radicale' >> /etc/systemd/system/radicale.service
    echo 'After=network.target' >> /etc/systemd/system/radicale.service
    echo 'Requires=uwsgi_rundir.service' >> /etc/systemd/system/radicale.service
    echo '' >> /etc/systemd/system/radicale.service
    echo '[Service]' >> /etc/systemd/system/radicale.service
    echo 'Type=simple' >> /etc/systemd/system/radicale.service
    echo 'User=www-data' >> /etc/systemd/system/radicale.service
    echo 'Group=www-data' >> /etc/systemd/system/radicale.service
    echo 'ExecStart=/usr/bin/uwsgi --ini /var/www/radicale/uwsgi.ini' >> /etc/systemd/system/radicale.service
    echo '' >> /etc/systemd/system/radicale.service
    echo '[Install]' >> /etc/systemd/system/radicale.service
    echo 'WantedBy=multi-user.target' >> /etc/systemd/system/radicale.service
    systemctl enable radicale
    systemctl start radicale

    RADICALE_ONION_HOSTNAME=$(add_onion_service radicale 80 ${RADICALE_ONION_PORT})

    if [[ $ONION_ONLY == 'no' ]]; then
        echo 'server {' > /etc/nginx/sites-available/radicale
        echo "    listen ${RADICALE_PORT} ssl;" >> /etc/nginx/sites-available/radicale
        echo "    listen [::]:${RADICALE_PORT} ssl;" >> /etc/nginx/sites-available/radicale
        echo '' >> /etc/nginx/sites-available/radicale
        function_check nginx_ssl
        nginx_ssl $DEFAULT_DOMAIN_NAME
        function_check nginx_disable_sniffing
        nginx_disable_sniffing $DEFAULT_DOMAIN_NAME
        echo '' >> /etc/nginx/sites-available/radicale
        echo "    server_name $DEFAULT_DOMAIN_NAME;" >> /etc/nginx/sites-available/radicale
        echo '' >> /etc/nginx/sites-available/radicale
        echo '    location / {' >> /etc/nginx/sites-available/radicale
        echo '        uwsgi_pass unix:/var/run/uwsgi/radicale.sock;' >> /etc/nginx/sites-available/radicale
        echo '        include uwsgi_params;' >> /etc/nginx/sites-available/radicale
        echo '    }' >> /etc/nginx/sites-available/radicale
        echo '}' >> /etc/nginx/sites-available/radicale
        echo '' >> /etc/nginx/sites-available/radicale
    else
        echo -n '' > /etc/nginx/sites-available/radicale
    fi
    echo 'server {' >> /etc/nginx/sites-available/radicale
    echo "    listen 127.0.0.1:${RADICALE_ONION_PORT} default_server;" >> /etc/nginx/sites-available/radicale
    echo '' >> /etc/nginx/sites-available/radicale
    echo "    server_name ${RADICALE_ONION_HOSTNAME};" >> /etc/nginx/sites-available/radicale
    echo '' >> /etc/nginx/sites-available/radicale
    echo '    location / {' >> /etc/nginx/sites-available/radicale
    echo '        uwsgi_pass unix:/var/run/uwsgi/radicale.sock;' >> /etc/nginx/sites-available/radicale
    echo '        include uwsgi_params;' >> /etc/nginx/sites-available/radicale
    echo '    }' >> /etc/nginx/sites-available/radicale
    echo '}' >> /etc/nginx/sites-available/radicale

    # create a certificate
    #if [[ "$(cert_exists ${DEFAULT_DOMAIN_NAME} pem)" == "0" ]]; then
    #    if [[ "$(cert_exists $DEFAULT_DOMAIN_NAME)" == "0" ]]; then
    #        ${PROJECT_NAME}-addcert -h $DEFAULT_DOMAIN_NAME --dhkey ${DH_KEYLENGTH}
    #        check_certificates $DEFAULT_DOMAIN_NAME
    #    fi
    #fi

    update_default_domain

    nginx_ensite radicale
    systemctl reload nginx

    set_completion_param "radicale onion domain" "${RADICALE_ONION_HOSTNAME}"

    if ! grep -q "Your RADICALE password is" /home/$MY_USERNAME/README; then
        echo '' >> /home/$MY_USERNAME/README
        echo $'# RADICALE' >> /home/$MY_USERNAME/README
        echo $"RADICALE onion domain: ${RADICALE_ONION_HOSTNAME}" >> /home/$MY_USERNAME/README
        echo $"Your RADICALE password is: ${RADICALE_PASSWORD}" >> /home/$MY_USERNAME/README
        chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/README
        chmod 600 /home/$MY_USERNAME/README
    fi

    function_check configure_firewall_for_radicale
    configure_firewall_for_radicale

    APP_INSTALLED=1
}

# NOTE: deliberately no exit 0
