#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# privatebin application
#
# 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 writer'

IN_DEFAULT_INSTALL=0
SHOW_ON_ABOUT=1

PRIVATEBIN_DOMAIN_NAME=
PRIVATEBIN_CODE=
PRIVATEBIN_ONION_PORT=8150
PRIVATEBIN_REPO="https://github.com/PrivateBin/PrivateBin"
PRIVATEBIN_COMMIT='9c132cd839fd5e91da18e4a1e8ebef64fce605fb'
PRIVATEBIN_ADMIN_PASSWORD=

privatebin_variables=(ONION_ONLY
                      PRIVATEBIN_DOMAIN_NAME
                      PRIVATEBIN_CODE
                      DDNS_PROVIDER
                      MY_USERNAME)

function secure_privatebin {
    pbpath="/var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs"
    pbdata="/var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/data"
    htgroup='www-data'
    rootuser='root'

    find "${pbpath}/" -type f -print0 | xargs -0 chmod 0640
    find "${pbpath}/" -type d -print0 | xargs -0 chmod 0550

    chown -R ${rootuser}:${htgroup} "${pbpath}/"
    chown -R www-data:www-data ${pbdata}
}

function logging_on_privatebin {
    echo -n ''
}

function logging_off_privatebin {
    echo -n ''
}

function remove_user_privatebin {
    remove_username="$1"
}

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

    echo '0'
}

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

    if [[ $ONION_ONLY != "no" ]]; then
        PRIVATEBIN_DOMAIN_NAME='privatebin.local'
    else
        PRIVATEBIN_DETAILS_COMPLETE=
        while [ ! $PRIVATEBIN_DETAILS_COMPLETE ]
        do
            data=$(tempfile 2>/dev/null)
            trap "rm -f $data" 0 1 2 5 15
            if [[ $DDNS_PROVIDER == "default@freedns.afraid.org" ]]; then
                dialog --backtitle $"Freedombone Configuration" \
                       --title $"PrivateBin Configuration" \
                       --form $"\nPlease enter your PrivateBin details. The background image URL can be left blank.\n\nIMPORTANT: This should be a domain name which is supported by Let's Encrypt:" 14 65 2 \
                       $"Domain:" 1 1 "$(grep 'PRIVATEBIN_DOMAIN_NAME' temp.cfg | awk -F '=' '{print $2}')" 1 15 33 40 \
                       $"Code:" 2 1 "$(grep 'PRIVATEBIN_CODE' temp.cfg | awk -F '=' '{print $2}')" 2 15 33 255 \
                       2> $data
            else
                dialog --backtitle $"Freedombone Configuration" \
                       --title $"PrivateBin Configuration" \
                       --form $"\nPlease enter your PrivateBin details. The background image URL can be left blank.\n\nIMPORTANT: This should be a domain name which is supported by Let's Encrypt:" 14 65 2 \
                       $"Domain:" 1 1 "$(grep 'PRIVATEBIN_DOMAIN_NAME' temp.cfg | awk -F '=' '{print $2}')" 1 15 33 40 \
                       2> $data
            fi
            sel=$?
            case $sel in
                1) exit 1;;
                255) exit 1;;
            esac
            PRIVATEBIN_DOMAIN_NAME=$(cat $data | sed -n 1p)
            if [ $PRIVATEBIN_DOMAIN_NAME ]; then
                if [[ $PRIVATEBIN_DOMAIN_NAME == "$HUBZILLA_DOMAIN_NAME" ]]; then
                    PRIVATEBIN_DOMAIN_NAME=""
                fi
                TEST_DOMAIN_NAME=$PRIVATEBIN_DOMAIN_NAME
                validate_domain_name
                if [[ $TEST_DOMAIN_NAME != $PRIVATEBIN_DOMAIN_NAME ]]; then
                    PRIVATEBIN_DOMAIN_NAME=
                    dialog --title $"Domain name validation" --msgbox "$TEST_DOMAIN_NAME" 15 50
                else
                    if [[ $DDNS_PROVIDER == "default@freedns.afraid.org" ]]; then
                        PRIVATEBIN_CODE=$(cat $data | sed -n 2p)
                        validate_freedns_code "$PRIVATEBIN_CODE"
                        if [ ! $VALID_CODE ]; then
                            PRIVATEBIN_DOMAIN_NAME=
                        fi
                    fi
                fi
            fi
            if [ $PRIVATEBIN_DOMAIN_NAME ]; then
                PRIVATEBIN_DETAILS_COMPLETE="yes"
            fi
        done

        write_config_param "PRIVATEBIN_CODE" "$PRIVATEBIN_CODE"
    fi
    write_config_param "PRIVATEBIN_DOMAIN_NAME" "$PRIVATEBIN_DOMAIN_NAME"
    APP_INSTALLED=1
}

function change_password_privatebin {
    curr_username="$1"
    new_user_password="$2"
}

function reconfigure_privatebin {
    echo -n ''
}

function upgrade_privatebin {
    CURR_PRIVATEBIN_COMMIT=$(get_completion_param "privatebin commit")
    if [[ "$CURR_PRIVATEBIN_COMMIT" == "$PRIVATEBIN_COMMIT" ]]; then
        return
    fi

    if grep -q "privatebin domain" $COMPLETION_FILE; then
        PRIVATEBIN_DOMAIN_NAME=$(get_completion_param "privatebin domain")
    fi

    # update to the next commit
    function_check set_repo_commit
    set_repo_commit /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs "privatebin commit" "$PRIVATEBIN_COMMIT" $PRIVATEBIN_REPO

    secure_privatebin
}


function backup_local_privatebin {
    PRIVATEBIN_DOMAIN_NAME='privatebin'
    if grep -q "privatebin domain" $COMPLETION_FILE; then
        PRIVATEBIN_DOMAIN_NAME=$(get_completion_param "privatebin domain")
    fi

    source_directory=/var/www/${PRIVATEBIN_DOMAIN_NAME}/htdocs/data

    function_check suspend_site
    suspend_site ${PRIVATEBIN_DOMAIN_NAME}

    function_check backup_directory_to_usb
    dest_directory=privatebin
    backup_directory_to_usb $source_directory $dest_directory

    function_check restart_site
    restart_site
}

function restore_local_privatebin {
    if ! grep -q "privatebin domain" $COMPLETION_FILE; then
        return
    fi
    PRIVATEBIN_DOMAIN_NAME=$(get_completion_param "privatebin domain")
    if [ $PRIVATEBIN_DOMAIN_NAME ]; then
        echo $"Restoring privatebin"
        temp_restore_dir=/root/tempprivatebin
        privatebin_dir=/var/www/${PRIVATEBIN_DOMAIN_NAME}/htdocs/data

        function_check restore_directory_from_usb
        restore_directory_from_usb $temp_restore_dir privatebin
        if [ -d $temp_restore_dir ]; then
            if [ -d cp $temp_restore_dir$privatebin_dir ]; then
                cp -rp $temp_restore_dir$privatebin_dir/* $privatebin_dir/
            else
                cp -rp $temp_restore_dir/* $privatebin_dir/
            fi
            secure_privatebin
            rm -rf $temp_restore_dir
        fi

        echo $"Restore of privatebin complete"
    fi
}

function backup_remote_privatebin {
    PRIVATEBIN_DOMAIN_NAME='privatebin'
    if grep -q "privatebin domain" $COMPLETION_FILE; then
        PRIVATEBIN_DOMAIN_NAME=$(get_completion_param "privatebin domain")
    fi

    source_directory=/var/www/${PRIVATEBIN_DOMAIN_NAME}/htdocs/data

    function_check suspend_site
    suspend_site ${PRIVATEBIN_DOMAIN_NAME}

    function_check backup_directory_to_friend
    dest_directory=privatebin
    backup_directory_to_friend $source_directory $dest_directory

    function_check restart_site
    restart_site
}

function restore_remote_privatebin {
    if ! grep -q "privatebin domain" $COMPLETION_FILE; then
        return
    fi
    PRIVATEBIN_DOMAIN_NAME=$(get_completion_param "privatebin domain")
    if [ $PRIVATEBIN_DOMAIN_NAME ]; then
        temp_restore_dir=/root/tempprivatebin
        privatebin_dir=/var/www/${PRIVATEBIN_DOMAIN_NAME}/htdocs/data

        function_check restore_directory_from_friend
        restore_directory_from_friend $temp_restore_dir privatebin
        if [ -d $temp_restore_dir ]; then
            if [ -d cp $temp_restore_dir$privatebin_dir ]; then
                cp -rp $temp_restore_dir$privatebin_dir/* $privatebin_dir/
            else
                cp -rp $temp_restore_dir/* $privatebin_dir/
            fi
            secure_privatebin
            rm -rf $temp_restore_dir
        fi
    fi
}

function remove_privatebin {
    if [ ${#PRIVATEBIN_DOMAIN_NAME} -eq 0 ]; then
        return
    fi
    read_config_param "PRIVATEBIN_DOMAIN_NAME"
    read_config_param "MY_USERNAME"
    echo "Removing $PRIVATEBIN_DOMAIN_NAME"
    nginx_dissite $PRIVATEBIN_DOMAIN_NAME
    remove_certs $PRIVATEBIN_DOMAIN_NAME

    if [ -d /var/www/$PRIVATEBIN_DOMAIN_NAME ]; then
        rm -rf /var/www/$PRIVATEBIN_DOMAIN_NAME
    fi
    if [ -f /etc/nginx/sites-available/$PRIVATEBIN_DOMAIN_NAME ]; then
        rm /etc/nginx/sites-available/$PRIVATEBIN_DOMAIN_NAME
    fi
    function_check remove_onion_service
    remove_onion_service privatebin ${PRIVATEBIN_ONION_PORT}
    if grep -q "privatebin" /etc/crontab; then
        sed -i "/privatebin/d" /etc/crontab
    fi
    remove_app privatebin
    remove_completion_param install_privatebin
    sed -i '/privatebin/d' $COMPLETION_FILE

    function_check remove_ddns_domain
    remove_ddns_domain $PRIVATEBIN_DOMAIN_NAME
}

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

    if [ ! $PRIVATEBIN_DOMAIN_NAME ]; then
        echo $'No domain name was given for privatebin'
        exit 7359
    fi

    apt-get -yq install php-gettext php-curl php-gd php-mysql git curl
    apt-get -yq install memcached php-memcached php-intl exiftool libfcgi0ldbl
    apt-get -yq install php-libsodium libsodium18 php-mcrypt

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

        if [ -d /repos/privatebin ]; then
            mkdir /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs
            cp -r -p /repos/privatebin/. /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs
            cd /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs
            git pull
        else
            function_check git_clone
            git_clone $PRIVATEBIN_REPO /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs
        fi

        if [ ! -d /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs ]; then
            echo $'Unable to clone privatebin repo'
            exit 63763873
        fi
    fi

    cd /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs
    git checkout $PRIVATEBIN_COMMIT -b $PRIVATEBIN_COMMIT
    set_completion_param "privatebin commit" "$PRIVATEBIN_COMMIT"

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

    function_check add_ddns_domain
    add_ddns_domain $PRIVATEBIN_DOMAIN_NAME

    PRIVATEBIN_ONION_HOSTNAME=$(add_onion_service privatebin 80 ${PRIVATEBIN_ONION_PORT})

    privatebin_nginx_site=/etc/nginx/sites-available/$PRIVATEBIN_DOMAIN_NAME
    if [[ $ONION_ONLY == "no" ]]; then
        function_check nginx_http_redirect
        nginx_http_redirect $PRIVATEBIN_DOMAIN_NAME "index index.php"
        echo 'server {' >> $privatebin_nginx_site
        echo '  listen 443 ssl;' >> $privatebin_nginx_site
        echo '  listen [::]:443 ssl;' >> $privatebin_nginx_site
        echo "  server_name $PRIVATEBIN_DOMAIN_NAME;" >> $privatebin_nginx_site
        echo '' >> $privatebin_nginx_site
        function_check nginx_compress
        nginx_compress $PRIVATEBIN_DOMAIN_NAME
        echo '' >> $privatebin_nginx_site
        echo '  # Security' >> $privatebin_nginx_site
        function_check nginx_ssl
        nginx_ssl $PRIVATEBIN_DOMAIN_NAME

        function_check nginx_disable_sniffing
        nginx_disable_sniffing $PRIVATEBIN_DOMAIN_NAME

        echo '  add_header Strict-Transport-Security max-age=15768000;' >> $privatebin_nginx_site
        echo '' >> $privatebin_nginx_site
        echo '  # Logs' >> $privatebin_nginx_site
        echo '  access_log /dev/null;' >> $privatebin_nginx_site
        echo '  error_log /dev/null;' >> $privatebin_nginx_site
        echo '' >> $privatebin_nginx_site
        echo "  root /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs;" >> $privatebin_nginx_site
        echo '' >> $privatebin_nginx_site
        echo '  index index.php;' >> $privatebin_nginx_site
        echo '' >> $privatebin_nginx_site
        echo '  location ~ \.php {' >> $privatebin_nginx_site
        echo '    include snippets/fastcgi-php.conf;' >> $privatebin_nginx_site
        echo '    fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;' >> $privatebin_nginx_site
        echo '    fastcgi_read_timeout 30;' >> $privatebin_nginx_site
        echo '  }' >> $privatebin_nginx_site
        echo '' >> $privatebin_nginx_site
        echo '  # Location' >> $privatebin_nginx_site
        echo '  location / {' >> $privatebin_nginx_site
        function_check nginx_limits
        nginx_limits $PRIVATEBIN_DOMAIN_NAME '15m'
        echo '    try_files $uri $uri/ @privatebin;' >> $privatebin_nginx_site
        echo '  }' >> $privatebin_nginx_site
        echo '' >> $privatebin_nginx_site
        echo '  # Restrict access that is unnecessary anyway' >> $privatebin_nginx_site
        echo '  location ~ /\.(ht|git) {' >> $privatebin_nginx_site
        echo '    deny all;' >> $privatebin_nginx_site
        echo '  }' >> $privatebin_nginx_site
        echo '}' >> $privatebin_nginx_site
        echo '' >> $privatebin_nginx_site
    else
        echo -n '' > $privatebin_nginx_site
    fi
    echo 'server {' >> $privatebin_nginx_site
    echo "    listen 127.0.0.1:$PRIVATEBIN_ONION_PORT default_server;" >> $privatebin_nginx_site
    echo "    server_name $PRIVATEBIN_ONION_HOSTNAME;" >> $privatebin_nginx_site
    echo '' >> $privatebin_nginx_site
    function_check nginx_compress
    nginx_compress $PRIVATEBIN_DOMAIN_NAME
    echo '' >> $privatebin_nginx_site
    function_check nginx_disable_sniffing
    nginx_disable_sniffing $PRIVATEBIN_DOMAIN_NAME
    echo '' >> $privatebin_nginx_site
    echo '  # Logs' >> $privatebin_nginx_site
    echo '  access_log /dev/null;' >> $privatebin_nginx_site
    echo '  error_log /dev/null;' >> $privatebin_nginx_site
    echo '' >> $privatebin_nginx_site
    echo "  root /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs;" >> $privatebin_nginx_site
    echo '' >> $privatebin_nginx_site
    echo '  index index.php;' >> $privatebin_nginx_site
    echo '' >> $privatebin_nginx_site
    echo '  location ~ \.php {' >> $privatebin_nginx_site
    echo '    include snippets/fastcgi-php.conf;' >> $privatebin_nginx_site
    echo '    fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;' >> $privatebin_nginx_site
    echo '    fastcgi_read_timeout 30;' >> $privatebin_nginx_site
    echo '  }' >> $privatebin_nginx_site
    echo '' >> $privatebin_nginx_site
    echo '  # Location' >> $privatebin_nginx_site
    echo '  location / {' >> $privatebin_nginx_site
    function_check nginx_limits
    nginx_limits $PRIVATEBIN_DOMAIN_NAME '15m'
    echo '    try_files $uri $uri/ @privatebin;' >> $privatebin_nginx_site
    echo '  }' >> $privatebin_nginx_site
    echo '' >> $privatebin_nginx_site
    echo '  # Restrict access that is unnecessary anyway' >> $privatebin_nginx_site
    echo '  location ~ /\.(ht|git) {' >> $privatebin_nginx_site
    echo '    deny all;' >> $privatebin_nginx_site
    echo '  }' >> $privatebin_nginx_site
    echo '}' >> $privatebin_nginx_site

    function_check configure_php
    configure_php

    function_check create_site_certificate
    create_site_certificate $PRIVATEBIN_DOMAIN_NAME 'yes'

    function_check nginx_ensite
    nginx_ensite $PRIVATEBIN_DOMAIN_NAME

    cp /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.sample.php /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php

    # Change some defaults
    sed -i 's|; qrcode|qrcode|g' /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php
    sed -i 's|default =.*|default = "1day"|g' /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php
    sed -i 's|languagedefault =.*|languagedefault = "en"|g' /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php
    sed -i 's|1week =|; 1week =|g' /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php
    sed -i 's|1month =|; 1month =|g' /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php
    sed -i 's|1year =|; 1year =|g' /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php
    sed -i 's|never =|; never =|g' /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php
    sed -i 's|limit = 300|limit = 0|g' /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php
    sed -i 's|sizelimit =.*|sizelimit = 32768|g' /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php
    sed -i 's|defaultformatter =.*|defaultformatter = "markdown"|g' /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php

    mkdir -p /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/data

    secure_privatebin

    systemctl restart php7.0-fpm
    systemctl restart nginx

    set_completion_param "privatebin domain" "$PRIVATEBIN_DOMAIN_NAME"

    APP_INSTALLED=1
}

# NOTE: deliberately there is no "exit 0"