#!/usr/bin/env bash

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/local/sbin:/usr/local/bin:~/bin

SCRIPTHOME="/root/antiddos"

function valid_ip()
{
    local  ip=$1
    local  stat=1

    [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]] && {
    OIFS=$IFS
    IFS='.'
    ip=($ip)
    IFS=$OIFS
    [[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
        && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
    stat=$?
    return $stat
}
}

###############

[[ -d $SCRIPTHOME ]] || exit 1

if ! VALID_IP=$(valid_ip "$1")
then
    echo "Usage: $0 <IP ADDR>" >&2
    exit 1
fi

sed_cmd="/$1/d;/^[[:space:]]*$/d;s/[[:space:]]*$//"

if LISTS=$(grep -lIrx "$1" "$SCRIPTHOME" | grep -v "\.sh")
then
    for i in $LISTS
    do
        echo "Removing $1 from $i"
        sed -i '' "$sed_cmd" ${i}
    done
    nginx -t && nginx -s reload
fi