#!/bin/bash

source .env # load vars from .env file

case "${1}" in
    search )
        # load container ip in array IPs
        mapfile IPs < <( nmap 172.28.0.2-10 -sn | grep "ngx" | awk '{print substr($6, 2, length($6)-2)}')
        # using 'tr' for escape bug with \n in array elements
        echo "IPs=( $(echo ${IPs[@]} | tr '\n' ' '))" >> .env
        ;;
    block )
        echo "knock -v ${IPs[$2]} $(echo ${CLOSE_PORT_SEQ} | sed 's/,//g')"
        knock -v ${IPs[$2]} $(echo ${CLOSE_PORT_SEQ} | sed 's/,//g')
        ;;
    open )
        echo "knock -v ${IPs[$2]} $(echo ${OPEN_PORT_SEQ} | sed 's/,//g')"
        knock -v ${IPs[$2]} $(echo ${OPEN_PORT_SEQ} | sed 's/,//g')
        ;;
    list )
        # print array IPs
        numb=0 # counter var
        for ip in "${IPs[@]}"; do
            echo "${numb}: ${ip}" # add index array element
            numb=$((${numb}+1))
        done
        ;;
esac