Монитор сообщений на форуме

#!/bin/bash

fileName="csnet.txt"
logName="csnet.log"
urlCheck="https://c-s.net.ua/"
urlOpen="C-S.Net.Ua"
weblog="/tmp/weblog"
userAgent="Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/113.02"


function _lang() {

    if (locale | grep -e 'ru_RU') >/dev/null 2>&1; then
        exemple_lang='$'
        access_lang="Запустите \"$(basename ${0})\" без прав суперпользователя"
        newMsg_lang='Новое на'
    else
        exemple_lang='$'
        access_lang="Run \"$(basename ${0})\" without root privileges"
        newMsg_lang='New on'
    fi

}

function checkroot() {

    _lang

    if [ "$(whoami)" = 'root' ]; then
        clear && echo -e "\n${access_lang}"
        echo -e "${exemple_lang} bash $(basename ${0})"
        exit
    fi

}

function check() {

    # Debian/Ubuntu
    if [ ! -f "$(which notify-send)" ] || [ ! -f "$(sudo which curl)" ]; then
        sudo apt update
    fi

    if [ ! -f "$(which notify-send)" ]; then
        sudo apt install libnotify-bin -y
    fi

    if [ ! -f "$(which curl)" ]; then
        sudo apt install curl -y
    fi

}

function main() {

_lang

    if [ ! -d "${weblog}" ]; then
        mkdir -p "${weblog}"
    fi

    curl -s -A "${userAgent}" -o "${weblog}/${fileName}" "${urlCheck}" && sed -n -i "/<\!-- боковая панель -->/,/<\!-- боковая панель -->/p" "${weblog}/${fileName}" &&


    if [ -f "${weblog}/${logName}" ]; then
        md5sum -c ${weblog}/${logName}
    
        if [ $? -ne 0 ]; then
            export DISPLAY=:0.0 &&
            XDG_RUNTIME_DIR=/run/user/$(id -u) \
            notify-send -i "terminal" -u low "${newMsg_lang} ${urlOpen}"
        fi
    fi

    md5sum "${weblog}/${fileName}" > "${weblog}/${logName}"
    exit 0
}

checkroot
# check
main