<?php

namespace AuthBundle\Utils;

use Symfony\Component\HttpFoundation\IpUtils as SfIpUtils;

class IpUtils
{

    /**
     * @param string $clientIp
     * @param array $ips
     * 
     * @return boolean
     */
    public function checkIp($clientIp, $ips = array())
    {
        // existe la variable de entorno API_CIDR ?
        // ej. API_CIDR = 127.0.0.1, 127.0.0.1-127.0.0.10, 127.0.0.1/24
        if (getenv("API_CIDR") !== false) {
            $API_CIDR = getenv("API_CIDR");
            $pieces = array_map('trim', explode(',', $API_CIDR));
            foreach ($pieces as $ip) {
                if (strpos($ip, '-') !== false) {
                    $this->getIpRange($ip, $ips);
                } else {
                    $ips[] = $ip;
                }
            }
        }
        foreach ($ips as $ip) {
            if (SfIpUtils::checkIp($clientIp, $ip)) {
                return true;
            }
        }

        return false;
    }
    
    /**
     * @param string $ipRange
     * @param array $ips
     * 
     * @return array
     */
    public function getIpRange($ipRange, $ips = array())
    {
        $pieces = array_map('trim', explode('-', $ipRange));
        if (isset($pieces[0]) && isset($pieces[1])) {
            $firstIp = $ip = ip2long($pieces[0]);
            $lastIp = ip2long($pieces[1]);
            while ($ip <= $lastIp) {
                $ips[] = long2ip($ip);
                $ip++;
            }
        } elseif (isset($pieces[0])) {
            $ips[] = $pieces[0];
        }
        
        return $ips;
    }

}