control scanner using telegram bot

scanit_bot.sh

KEY="<telegram-token>"
CHATID="<CHATID>"
COUNTER=1

replay() {
    curl -s -d "chat_id=$CHATID&text=$1" "https://api.telegram.org/bot$KEY/sendMessage"
}

while [[ true ]]; do
    URL_GET="https://api.telegram.org/bot$KEY/getUpdates?limit=1&update_id=$UPDATEID&offset=$((UPDATEID + 1))"
    UPDATEID=$(curl -s $URL_GET | python -c "import sys, json; r=json.load(sys.stdin)['result']; out=r[0]['update_id'] if len(r) else 0; print(out)")

    if [[ $UPDATEID != "0" ]]; then
        MSG=$(curl -s $URL_GET | \
              python -c "import sys, json; r=json.load(sys.stdin)['result']; out=r[0]['message']['text'] if len(r) else 0; print(out)")
        if [[ $MSG == "Scan" ]]; then
            replay "ok wait :D"
            scanimage --format tiff --mode Color --compression JPEG --resolution 200 | convert - "scan/out-$COUNTER.jpg"
            #passport size: -x 125 -y 180
            replay "$COUNTER: done! ;)"
            ((COUNTER++))
        fi
    fi
    sleep 2s
done