#!/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_SHORT_DESCRIPTION=$'PrivateBin'
PRIVATEBIN_DESCRIPTION=$'PrivateBin zero knowledge pastebin'
PRIVATEBIN_MOBILE_APP_URL=

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}"
    chmod 755 "${pbdata}"
}

function logging_on_privatebin {
    echo -n ''
}

function logging_off_privatebin {
    echo -n ''
}

function remove_user_privatebin {
    echo -n ''
#    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 [ ! $PRIVATEBIN_DETAILS_COMPLETE ]
        do
            data=$(mktemp 2>/dev/null)
            if [[ "$DDNS_PROVIDER" == *"freedns"* ]]; 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 $sel in
                1) rm -f "$data"
                   exit 1;;
                255) rm -f "$data"
                     exit 1;;
            esac
            PRIVATEBIN_DOMAIN_NAME=$(sed -n 1p < "$data")
            if [ "$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 [[ "$DDNS_PROVIDER" == *"freedns"* ]]; then
                        PRIVATEBIN_CODE=$(sed -n 2p < "$data")
                        validate_freedns_code "$PRIVATEBIN_CODE"
                        if [ ! "$VALID_CODE" ]; then
                            PRIVATEBIN_DOMAIN_NAME=
                        fi
                    fi
                fi
            fi
            if [ $PRIVATEBIN_DOMAIN_NAME ]; then
                PRIVATEBIN_DETAILS_COMPLETE="yes"
            fi
            rm -f "$data"
        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"
    echo -n ''
}

function reconfigure_privatebin {
    echo -n ''
}

function upgrade_privatebin {
    if grep -q "privatebin domain" "$COMPLETION_FILE"; then
        PRIVATEBIN_DOMAIN_NAME=$(get_completion_param "privatebin domain")
    fi
    chmod 755 "/var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/data"

    CURR_PRIVATEBIN_COMMIT=$(get_completion_param "privatebin commit")
    if [[ "$CURR_PRIVATEBIN_COMMIT" == "$PRIVATEBIN_COMMIT" ]]; then
        return
    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 $temp_restore_dir ]; then
            if [ -d "$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 $temp_restore_dir ]; then
            if [ -d "$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/$PRIVATEBIN_DOMAIN_NAME/htdocs" || exit 3468246824
            git pull
        else
            function_check git_clone
            git_clone "$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/$PRIVATEBIN_DOMAIN_NAME/htdocs" || exit 24682462
    git checkout "$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 {';
          echo '  listen 443 ssl;';
          echo '  #listen [::]:443 ssl;';
          echo "  server_name $PRIVATEBIN_DOMAIN_NAME;";
          echo ''; } >> "$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_security_options
        nginx_security_options "$PRIVATEBIN_DOMAIN_NAME"

        { echo '  add_header Strict-Transport-Security max-age=15768000;';
          echo '';
          echo '  # Logs';
          echo '  access_log /dev/null;';
          echo '  error_log /dev/null;';
          echo '';
          echo "  root /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs;";
          echo '';
          echo '  index index.php;';
          echo '';
          echo '  location ~ \.php {';
          echo '    include snippets/fastcgi-php.conf;';
          echo '    fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;';
          echo '    fastcgi_read_timeout 30;';
          echo '  }';
          echo '';
          echo '  # Location';
          echo '  location / {'; } >> "$privatebin_nginx_site"
        function_check nginx_limits
        nginx_limits "$PRIVATEBIN_DOMAIN_NAME" '15m'
        { echo "    try_files \$uri \$uri/ @privatebin;";
          echo '  }';
          echo '';
          echo '  # Restrict access that is unnecessary anyway';
          echo '  location ~ /\.(ht|git) {';
          echo '    deny all;';
          echo '  }';
          echo '}';
          echo ''; } >> "$privatebin_nginx_site"
    else
        echo -n '' > "$privatebin_nginx_site"
    fi
    { echo 'server {';
      echo "    listen 127.0.0.1:$PRIVATEBIN_ONION_PORT default_server;";
      echo "    server_name $PRIVATEBIN_ONION_HOSTNAME;";
      echo ''; } >> "$privatebin_nginx_site"
    function_check nginx_compress
    nginx_compress "$PRIVATEBIN_DOMAIN_NAME"
    echo '' >> "$privatebin_nginx_site"
    function_check nginx_security_options
    nginx_security_options "$PRIVATEBIN_DOMAIN_NAME"
    { echo '';
      echo '  # Logs';
      echo '  access_log /dev/null;';
      echo '  error_log /dev/null;';
      echo '';
      echo "  root /var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs;";
      echo '';
      echo '  index index.php;';
      echo '';
      echo '  location ~ \.php {';
      echo '    include snippets/fastcgi-php.conf;';
      echo '    fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;';
      echo '    fastcgi_read_timeout 30;';
      echo '  }';
      echo '';
      echo '  # Location';
      echo '  location / {'; } >> "$privatebin_nginx_site"
    function_check nginx_limits
    nginx_limits "$PRIVATEBIN_DOMAIN_NAME" '15m'
    { echo "    try_files \$uri \$uri/ @privatebin;";
      echo '  }';
      echo '';
      echo '  # Restrict access that is unnecessary anyway';
      echo '  location ~ /\.(ht|git) {';
      echo '    deny all;';
      echo '  }';
      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/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php"
    sed -i 's|1year =|; 1year =|g' "/var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php"
    sed -i 's|never =|; never =|g' "/var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php"
    sed -i 's|limit = 10|limit = 30|g' "/var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php"
    sed -i 's|limit = 300|limit = 0|g' "/var/www/$PRIVATEBIN_DOMAIN_NAME/htdocs/cfg/conf.php"
    sed -i 's|batchsize =.*|batchsize = 100|g' "/var/www/$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"