#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Jitsi meet + videobridge
#
# Instructions: https://github.com/jitsi/jitsi-meet/blob/master/doc/manual-install.md
#
# License
# =======
#
# Copyright (C) 2016-2017 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=0

VIDEOBRIDGE_PORT=5347
JITSI_ONION_PORT=8102
JITSI_PORT=5280

# domains
JITSI_DOMAIN_NAME=
JITSI_CODE=
JITSI_ONION_HOSTNAME=

jitsi_variables=(ONION_ONLY
                 JITSI_DOMAIN_NAME
                 JITSI_ONION_HOSTNAME
                 JITSI_CODE
                 DEFAULT_DOMAIN_NAME
                 MY_USERNAME)

function jitsi_disable_google_spyware {
    # Presumably they included Google Analytics for benign reasons, but it's
    # an obvious security problem. This should disable it.
    sed -i "s|Google Analytics|Google Spyware deactivated|g" /usr/share/jitsi-meet/analytics.js
    sed -i "s|www.google-analytics.com|${JITSI_DOMAIN_NAME}|g" /usr/share/jitsi-meet/analytics.js
    if ! grep '//ga(' /usr/share/jitsi-meet/analytics.js; then
        sed -i 's|ga(|//ga(|g' /usr/share/jitsi-meet/analytics.js
    fi
    if ! grep '//action +' /usr/share/jitsi-meet/analytics.js; then
        sed -i 's|action +|//action +|g' /usr/share/jitsi-meet/analytics.js
    fi

    sed -i "s|Google Analytics|Google Spyware deactivated|g" /usr/share/jitsi-meet/libs/analytics.js
    sed -i "s|www.google-analytics.com|${JITSI_DOMAIN_NAME}|g" /usr/share/jitsi-meet/libs/analytics.js
    if ! grep '//ga(' /usr/share/jitsi-meet/libs/analytics.js; then
        sed -i 's|ga(|//ga(|g' /usr/share/jitsi-meet/libs/analytics.js
    fi
    if ! grep '//action +' /usr/share/jitsi-meet/libs/analytics.js; then
        sed -i 's|action +|//action +|g' /usr/share/jitsi-meet/libs/analytics.js
    fi
}

function can_install_videobridge {
    check_architecture=$(uname -a)
    if [[ "$check_architecture" == *"amd64"* || "$check_architecture" == *"i386"* ]]; then
        echo "1"
    else
        echo "0"
    fi
}

function remove_jitsi_subdomains {
    function_check remove_onion_service
    remove_onion_service jitsi ${JITSI_ONION_PORT}
}

function remove_user_jitsi {
    remove_username="$1"
}

function add_user_jitsi {
    new_username="$1"
    new_user_password="$2"
}

function install_interactive_jitsi {
    if [ ! ${ONION_ONLY} ]; then
        ONION_ONLY='no'
    fi

    if [[ ${ONION_ONLY} != "no" ]]; then
        JITSI_DOMAIN_NAME='jitsi.local'
        write_config_param "JITSI_DOMAIN_NAME" "$JITSI_DOMAIN_NAME"
    else
        function_check interactive_site_details
        interactive_site_details "jitsi" "JITSI_DOMAIN_NAME" "JITSI_CODE"
    fi
    APP_INSTALLED=1
}

function configure_interactive_jitsi {
    echo -n ''
}

function reconfigure_jitsi {
    echo -n ''
}

function upgrade_jitsi {
    jitsi_disable_google_spyware
}

function backup_local_jitsi {
    echo -n ''
}

function restore_local_jitsi {
    echo -n ''
}

function backup_remote_jitsi {
    echo -n ''
}

function restore_remote_jitsi {
    echo -n ''
}

function remove_jitsi {
    read_config_param JITSI_DOMAIN_NAME
    if [ ${#JITSI_DOMAIN_NAME} -eq 0 ]; then
        return
    fi

    if [ -f /etc/nginx/sites-available/${JITSI_DOMAIN_NAME} ]; then
        nginx_dissite ${JITSI_DOMAIN_NAME}
        if [ -d /var/www/${JITSI_DOMAIN_NAME} ]; then
            rm -rf /var/www/${JITSI_DOMAIN_NAME}
        fi
        rm /etc/nginx/sites-available/${JITSI_DOMAIN_NAME}

        function_check remove_certs
        remove_certs ${JITSI_DOMAIN_NAME}

        systemctl reload nginx
    fi

    remove_jitsi_subdomains

    systemctl stop prosody
    if [ -f /etc/prosody/conf.d/${JITSI_DOMAIN_NAME}.cfg.lua ]; then
        rm /etc/prosody/conf.d/${JITSI_DOMAIN_NAME}.cfg.lua
    fi
    if [ -f /etc/prosody/conf.avail/${JITSI_DOMAIN_NAME}.cfg.lua ]; then
        rm /etc/prosody/conf.avail/${JITSI_DOMAIN_NAME}.cfg.lua
    fi
    prosodyctl unregister focus auth.${JITSI_DOMAIN_NAME}
    systemctl start prosody

    remove_nodejs jitsi

    # remove videobridge
    firewall_remove ${VIDEOBRIDGE_PORT}
    firewall_remove "10000:20000"
    apt-get -yq remove --purge jitsi-videobridge jicofo jitsi-meet jitsi-meet-prosody
    if [ -d /etc/jitsi ]; then
        rm -rf /etc/jitsi
    fi
    if [ -d /usr/share/jitsi-videobridge ]; then
        rm -rf /usr/share/jitsi-videobridge
    fi
    if [ -d /usr/share/jitsi-meet ]; then
        rm -rf /usr/share/jitsi-meet
    fi
    if [ -d /etc/jitsi ]; then
        rm -rf /etc/jitsi
    fi
    sed -i "/jitsi/d" /etc/apt/sources.list
    rm /etc/apt/sources.list.d/jitsi*
    apt-get update

    remove_app jitsi
    remove_completion_param install_jitsi
    sed -i '/jitsi/d' ${COMPLETION_FILE}

    function_check remove_ddns_domain
    remove_ddns_domain $JITSI_DOMAIN_NAME
}

function install_jitsi {
    if [[ "$(can_install_videobridge)" == "0" ]]; then
        echo $'jitsi meet/videobridge can only be installed on i386 or amd64 architectures'
        exit 83562
    fi

    if [ ! ${JITSI_DOMAIN_NAME} ]; then
        echo $'No domain name was given for jitsi'
        exit 47682
    fi

    if [ ! -d /etc/prosody ]; then
        echo $'xmpp must be installed before installing jitsi'
        exit 62394
    fi

    if [[ "${JITSI_DOMAIN_NAME}" == "${DEFAULT_DOMAIN_NAME}" ]]; then
        echo $'The jitsi domain name should not be the same as the main domain name'
        exit 78372
    fi

    # add jitsi repo
    jitsi_deb_repo=unstable #binary
    apt-get -yq install wget debconf-utils default-jre
    install_nodejs jitsi
    npm install -g browserify@13.1.1
    if [ ! "$?" = "0" ]; then
        remove_nodejs jitsi
        exit 638352
    fi
    if ! grep "jitsi" /etc/apt/sources.list; then
        echo "deb http://download.jitsi.org/nightly/deb ${jitsi_deb_repo}/" >> /etc/apt/sources.list
    fi
    wget -qO - https://download.jitsi.org/nightly/deb/${jitsi_deb_repo}/archive.key | apt-key add -
    apt-get update

    JITSI_ONION_HOSTNAME=$(add_onion_service jitsi 80 ${JITSI_ONION_PORT})

    # videobridge
    if [[ $ONION_ONLY == 'no' ]]; then
        debconf-set-selections <<< "jitsi-videobridge jitsi-videobridge/jvb-hostname string ${JITSI_DOMAIN_NAME}"
    else
        debconf-set-selections <<< "jitsi-videobridge jitsi-videobridge/jvb-hostname string ${JITSI_ONION_HOSTNAME}"
    fi
    apt-get -yq install jitsi-videobridge
    if [ ! -d /etc/jitsi ]; then
        echo $'Videobridge package failed to install'
        exit 63983
    fi
    firewall_add videobridge ${VIDEOBRIDGE_PORT}
    firewall_add_range jitsi 10000 20000 udp

    # meet
    debconf-set-selections <<< "jitsi-meet jitsi-meet/cert-choice multiselect 1"
    apt-get -yq install jitsi-meet jitsi-meet-prosody

    jitsi_nginx_site=/etc/nginx/sites-available/${JITSI_DOMAIN_NAME}

    if [ -f ${jitsi_nginx_site}.conf ]; then
        rm ${jitsi_nginx_site}.conf
    fi

    echo 'server_names_hash_bucket_size 64;' > $jitsi_nginx_site
    if [[ $ONION_ONLY == "no" ]]; then
        echo '' >> $jitsi_nginx_site
        echo 'server {' >> $jitsi_nginx_site
        echo '    listen 80;' >> $jitsi_nginx_site
        echo "    server_name ${JITSI_DOMAIN_NAME};" >> $jitsi_nginx_site
        echo '    return 301 https://$host$request_uri;' >> $jitsi_nginx_site
        echo '}' >> $jitsi_nginx_site
        echo 'server {' >> $jitsi_nginx_site
        echo '    listen 443 ssl;' >> $jitsi_nginx_site
        echo '    listen [::]:443 ssl;' >> $jitsi_nginx_site
        echo "    server_name ${JITSI_DOMAIN_NAME};" >> $jitsi_nginx_site
        echo '' >> $jitsi_nginx_site

        function_check nginx_ssl
        nginx_ssl ${JITSI_DOMAIN_NAME}

        function_check nginx_disable_sniffing
        nginx_disable_sniffing ${JITSI_DOMAIN_NAME}

        echo '    add_header Strict-Transport-Security max-age=15768000;' >> $jitsi_nginx_site
        echo '' >> $jitsi_nginx_site
        echo '    root /usr/share/jitsi-meet;' >> $jitsi_nginx_site
        echo '    index index.html index.htm;' >> $jitsi_nginx_site
        echo '' >> $jitsi_nginx_site
        echo '    location /config.js {' >> $jitsi_nginx_site
        echo "        alias /etc/jitsi/meet/${JITSI_DOMAIN_NAME}-config.js;" >> $jitsi_nginx_site
        echo '    }' >> $jitsi_nginx_site
        echo '' >> $jitsi_nginx_site
        echo '    location ~ ^/([a-zA-Z0-9=\?]+)$ {' >> $jitsi_nginx_site
        echo '        rewrite ^/(.*)$ / break;' >> $jitsi_nginx_site
        echo '    }' >> $jitsi_nginx_site
        echo '' >> $jitsi_nginx_site
        echo '    location / {' >> $jitsi_nginx_site
        echo '        ssi on;' >> $jitsi_nginx_site
        echo '    }' >> $jitsi_nginx_site
        echo '' >> $jitsi_nginx_site
        echo '    # Backward compatibility' >> $jitsi_nginx_site
        echo '    location ~ /external_api.* {' >> $jitsi_nginx_site
        echo '        root /usr/share/jitsi-meet/libs;' >> $jitsi_nginx_site
        echo '    }' >> $jitsi_nginx_site
        echo '' >> $jitsi_nginx_site
        echo '    # Logs' >> $jitsi_nginx_site
        echo '    access_log /dev/null;' >> $jitsi_nginx_site
        echo '    error_log /dev/null;' >> $jitsi_nginx_site
        echo '' >> $jitsi_nginx_site
        echo '    # BOSH' >> $jitsi_nginx_site
        echo '    location /http-bind {' >> $jitsi_nginx_site
        echo '        proxy_pass      http://localhost:5280/http-bind;' >> $jitsi_nginx_site
        echo '        proxy_set_header X-Forwarded-For $remote_addr;' >> $jitsi_nginx_site
        echo '        proxy_set_header Host $http_host;' >> $jitsi_nginx_site
        echo '    }' >> $jitsi_nginx_site
        echo '}' >> $jitsi_nginx_site
    fi
    echo '' >> $jitsi_nginx_site
    echo 'server {' >> $jitsi_nginx_site
    echo "    listen 127.0.0.1:$JITSI_ONION_PORT default_server;" >> $jitsi_nginx_site
    if [[ $ONION_ONLY == 'no' ]]; then
        echo "    server_name ${JITSI_DOMAIN_NAME};" >> $jitsi_nginx_site
    else
        echo "    server_name ${JITSI_ONION_HOSTNAME};" >> $jitsi_nginx_site
    fi
    echo '' >> $jitsi_nginx_site
    echo '    root /usr/share/jitsi-meet;' >> $jitsi_nginx_site
    echo '    index index.html index.htm;' >> $jitsi_nginx_site
    echo '' >> $jitsi_nginx_site
    echo '    location /config.js {' >> $jitsi_nginx_site
    echo "        alias /etc/jitsi/meet/${JITSI_DOMAIN_NAME}-config.js;" >> $jitsi_nginx_site
    echo '    }' >> $jitsi_nginx_site
    echo '' >> $jitsi_nginx_site
    echo '    location ~ ^/([a-zA-Z0-9=\?]+)$ {' >> $jitsi_nginx_site
    echo '        rewrite ^/(.*)$ / break;' >> $jitsi_nginx_site
    echo '    }' >> $jitsi_nginx_site
    echo '' >> $jitsi_nginx_site
    echo '    location / {' >> $jitsi_nginx_site
    echo '        ssi off;' >> $jitsi_nginx_site
    echo '    }' >> $jitsi_nginx_site
    echo '' >> $jitsi_nginx_site
    echo '    # Backward compatibility' >> $jitsi_nginx_site
    echo '    location ~ /external_api.* {' >> $jitsi_nginx_site
    echo '        root /usr/share/jitsi-meet/libs;' >> $jitsi_nginx_site
    echo '    }' >> $jitsi_nginx_site
    echo '' >> $jitsi_nginx_site
    echo '    # Logs' >> $jitsi_nginx_site
    echo '    access_log /dev/null;' >> $jitsi_nginx_site
    echo '    error_log /dev/null;' >> $jitsi_nginx_site
    echo '' >> $jitsi_nginx_site
    echo '    # BOSH' >> $jitsi_nginx_site
    echo '    location /http-bind {' >> $jitsi_nginx_site
    echo '        proxy_pass      http://localhost:5280/http-bind;' >> $jitsi_nginx_site
    echo '        proxy_set_header X-Forwarded-For $remote_addr;' >> $jitsi_nginx_site
    echo '        proxy_set_header Host $http_host;' >> $jitsi_nginx_site
    echo '    }' >> $jitsi_nginx_site
    echo '}' >> $jitsi_nginx_site

    sed -i "s|/var/www/${JITSI_DOMAIN_NAME}/htdocs|/usr/share/jitsi-meet|g" $jitsi_nginx_site

    if [ ! -f /etc/ssl/certs/${JITSI_DOMAIN_NAME}.pem ]; then
        if [ -f /etc/ssl/certs/${JITSI_DOMAIN_NAME}.crt ]; then
            rm /etc/ssl/certs/${JITSI_DOMAIN_NAME}.crt
        fi
        if [ -f /etc/ssl/certs/${JITSI_DOMAIN_NAME}.dhparam ]; then
            rm /etc/ssl/certs/${JITSI_DOMAIN_NAME}.dhparam
        fi
        function_check create_site_certificate
        create_site_certificate ${JITSI_DOMAIN_NAME} 'yes'
        if [[ $ONION_ONLY == "no" ]]; then
            if [ ! -f /etc/ssl/certs/${JITSI_DOMAIN_NAME}.pem ]; then
                exit 678363
            fi
        fi
    fi

    if [ -d /etc/letsencrypt ]; then
        usermod -a -G www-data jitsi
        usermod -a -G ssl-cert jitsi
    fi

    if [ -f /etc/ssl/certs/${JITSI_DOMAIN_NAME}.pem ]; then
        sed -i "s|.crt|.pem|g" /etc/prosody/conf.d/${JITSI_DOMAIN_NAME}.cfg.lua
    fi

    sed -i "s|key =.*|key = \"/etc/ssl/private/${JITSI_DOMAIN_NAME}.key\"|g" /etc/prosody/conf.avail/${JITSI_DOMAIN_NAME}.cfg.lua
    sed -i "s|certificate =.*|certificate = \"/etc/ssl/certs/${JITSI_DOMAIN_NAME}.pem\"|g" /etc/prosody/conf.avail/${JITSI_DOMAIN_NAME}.cfg.lua

    sed -i "s|enableWelcomePage:.*|enableWelcomePage: false,|g" /etc/jitsi/meet/${JITSI_DOMAIN_NAME}-config.js
    sed -i "s|disableStats:.*|disableStats: true,|g" /etc/jitsi/meet/${JITSI_DOMAIN_NAME}-config.js
    sed -i "s|minHDHeight:.*|minHDHeight: 800,|g" /etc/jitsi/meet/${JITSI_DOMAIN_NAME}-config.js
    sed -i "s|clientNode:.*|clientNode: 'https://${JITSI_DOMAIN_NAME}',|g" /etc/jitsi/meet/${JITSI_DOMAIN_NAME}-config.js

    sed -i "s|navigator.mozGetUserMedia|navigator.mediaDevices.getUserMedia|g" /usr/share/jitsi-meet/libs/lib-jitsi-meet.min.js

    # generated certs which aren't used
    if [ -f /usr/lib/ssl/certs/${JITSI_DOMAIN_NAME}.pem ]; then
        rm /usr/lib/ssl/certs/${JITSI_DOMAIN_NAME}.pem
    fi
    if [ -f /usr/lib/ssl/private/${JITSI_DOMAIN_NAME}.key ]; then
        rm /usr/lib/ssl/private/${JITSI_DOMAIN_NAME}.key
    fi
    if [ -f /usr/lib/ssl/certs/${JITSI_DOMAIN_NAME}.dhparam ]; then
        rm /usr/lib/ssl/certs/${JITSI_DOMAIN_NAME}.dhparam
    fi

    function_check nginx_ensite
    nginx_ensite ${JITSI_DOMAIN_NAME}

    set_completion_param "jitsi domain" "$JITSI_DOMAIN_NAME"

    jitsi_disable_google_spyware

    systemctl restart nginx
    systemctl restart prosody

    function_check add_ddns_domain
    add_ddns_domain $JITSI_DOMAIN_NAME

    APP_INSTALLED=1
}