<?php
/*
 *
 * @ This file is created by http://DeZender.Net
 * @ deZender (PHP5 Decoder for ionCube Encoder)
 *
 * @ Version		:	3.5.0.0
 * @ Author			:	DeZender
 * @ Release on		:	22.06.2018
 * @ Official site	:	http://DeZender.Net
 *
 */

namespace WHMCS;

class License
{
	private $licensekey = '';
	private $localkey = false;
	private $keydata = null;
	private $salt = '';
	private $postmd5hash = '';
	private $localkeydays = '10';
	private $allowcheckfaildays = '5';
	private $useInternalLicensingMirror = false;
	private $debuglog = array();
	private $lastCurlError = null;

	const LICENSE_API_VERSION = '1.1';
	const LICENSE_API_HOSTS = array('a.licensing.whmcs.com', 'b.licensing.whmcs.com', 'c.licensing.whmcs.com', 'd.licensing.whmcs.com', 'e.licensing.whmcs.com', 'f.licensing.whmcs.com');
	const STAGING_LICENSE_API_HOSTS = array('hou-1.licensing.web.staging.whmcs.com');
	const UNLICENSED_KEY = 'LICENSE-REQUIRED';

	public function checkFile($value)
	{
		if ($value != 'a896faf2c31f2acd47b0eda0b3fd6070958f1161') {
			throw new Exception\Fatal('File version mismatch. Please contact support.');
		}

		return $this;
	}

	public function setLicenseKey($licenseKey)
	{
		$this->licensekey = $licenseKey;

		return $this;
	}

	public function setLocalKey($localKey)
	{
		$this->decodeLocal($localKey);

		return $this;
	}

	public function setSalt($version, $hash)
	{
		if (empty($version) || empty($hash)) {
			throw new Exception('Unable to generate licensing salt');
		}

		$this->salt = sha1(sprintf('WHMCS%s%s%s', $version, '|-|', $hash));

		return $this;
	}

	public function useInternalValidationMirror()
	{
		$this->useInternalLicensingMirror = true;

		return $this;
	}

	protected function getHosts()
	{
		if ($this->useInternalLicensingMirror) {
			return self::STAGING_LICENSE_API_HOSTS;
		}

		return self::LICENSE_API_HOSTS;
	}

	public function getLicenseKey()
	{
		return $this->licensekey;
	}

	protected function getHostDomain()
	{
		$domain = (defined('WHMCS_LICENSE_DOMAIN') ? WHMCS_LICENSE_DOMAIN : '');

		if (empty($domain) || $domain == '-') {
			throw new Exception('Unable to retrieve current server name. Please check PHP/vhost configuration and ensure SERVER_NAME is displaying appropriately via PHP Info.');
		}

		$this->debug('Host Domain: ' . $domain);

		return $domain;
	}

	protected function getHostIP()
	{
		$ip = (defined('WHMCS_LICENSE_IP') ? WHMCS_LICENSE_IP : '');
		$this->debug('Host IP: ' . $ip);

		return $ip;
	}

	protected function getHostDir()
	{
		$directory = (defined('WHMCS_LICENSE_DIR') ? WHMCS_LICENSE_DIR : '');
		$this->debug('Host Directory: ' . $directory);

		return $directory;
	}

	private function getSalt()
	{
		return $this->salt;
	}

	protected function isLocalKeyValidToUse()
	{
		$licenseKey = $this->getKeyData('key');

		if (empty($licenseKey) || $licenseKey != $this->licensekey) {
			throw new Exception('License Key Mismatch in Local Key');
		}

		$originalcheckdate = $this->getCheckDate();
		$localmax = Carbon::now()->startOfDay()->addDays(2);

		if ($originalcheckdate->gt($localmax)) {
			throw new Exception('Original check date is in the future');
		}
	}

	protected function hasLocalKeyExpired()
	{
		$originalCheckDate = $this->getCheckDate();
		$localExpiryMax = Carbon::now()->startOfDay()->subDays($this->localkeydays);

		if (!$originalCheckDate || $originalCheckDate->lt($localExpiryMax)) {
			throw new Exception('Original check date is outside allowed validity period');
		}
	}

	protected function buildPostData()
	{
		$whmcs = \DI::make('app');
		$stats = json_decode($whmcs->get_config('SystemStatsCache'), true);

		if (!is_array($stats)) {
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