<?php
class gateway {

	public function __construct(){
	}
	public function convert_currency($amount, $from, $to){
		$amount = urlencode($amount);
		$from = urlencode($from);
		$to = urlencode($to);
		$rawdata = file_get_contents("https://finance.google.com/finance/converter?a=$amount&from=$from&to=$to");
		$data = explode('bld>', $rawdata);
		$data = explode($to, $data[1]);
		return round($data[0], 2);
	}
	public function gen_txnid($id){
		$chars = '';
		foreach(range('A', 'Z') as $char):
			$chars .= $char;
		endforeach;
		$txnid = substr(str_shuffle($chars), 0, 2).date('ymd').str_pad($id + 1, 6, 0, STR_PAD_LEFT).'ID';
		return $txnid;
	}
	public function secretkey($param1, $param2){
		$secretkey = strtoupper(hash('sha256', mt_rand().md5($param1).time().base64_encode($param2).uniqid(true)));
		return $secretkey;
	}
	private function getDateTime(){
		return date('Y:m:d-H:i:s');
	}
	private function createHash($storeid, $chargetotal, $currency, $sharedsecret){
		$stringtohash = $storeid.$this->getDateTime().$chargetotal.$currency.$sharedsecret;
		$ascii = bin2hex($stringtohash);
		return sha1($ascii);
	}
	private function icici($name, $email, $phone, $txnid, $currency, $amount, $surl, $furl){
		$storeids = array('INR' => '3396068416', 'USD' => '3396068424');
		$storeid  = (array_key_exists($currency, $storeids)) ? $storeids[$currency] : '';
		$currencies = array('INR' => '356', 'USD' => '840');
		$currencycode = (array_key_exists($currency, $currencies)) ? $currencies[$currency] : '';
		$sharedsecrets = array('INR' => '[?]@q]jnv11vM', 'USD' => 'whq5A>yk@1HR');
		$sharedsecret  = (array_key_exists($currency, $sharedsecrets)) ? $sharedsecrets[$currency] : '';

		if(empty($storeid)):
			die(output(false, 'Internal server error. Please try again.'));
		endif;
		if(empty($currencycode)):
			die(output(false, 'No valid currency found. Please try again.'));
		endif;
		if(empty($sharedsecret)):
			die(output(false, 'Internal server error. Please try again.'));
		endif;
$html = <<<EOJ
		<form action="https://www4.ipg-online.com/connect/gateway/processing" method="post" name="redirect">
		<input type="hidden" name="txntype" value="sale" readonly />
		<input type="hidden" name="timezone" value="Asia/Kolkata" readonly />
		<input type="hidden" name="authenticateTransaction" value="true" readonly />
		<input type="hidden" name="txndatetime" value="{$this->getDateTime()}" readonly />
		<input type="hidden" name="hash_algorithm" value="SHA1" readonly />
		<input type="hidden" name="hash" value="{$this->createHash($storeid, $amount, $currencycode, $sharedsecret)}" readonly />
		<input type="hidden" name="storename" value="{$storeid}" readonly />
		<input type="hidden" name="mode" value="payonly" readonly />
		<input type="hidden" name="chargetotal" value="{$amount}" readonly />
		<input type="hidden" name="currency" value="{$currencycode}" readonly />
		<input type="hidden" name="sharedsecret" value="{$sharedsecret}" readonly />
		<input type="hidden" name="mobileMode" value="true" readonly />
		<input type="hidden" name="customerid" value="{$txnid}" readonly />
		<input type="hidden" name="merchantTransactionId" value="{$txnid}" readonly />
		<input type="hidden" name="responseSuccessURL" value="{$surl}" readonly />
		<input type="hidden" name="responseFailURL" value="{$furl}" readonly />
		<input type="submit" value="Click Here" style="display:none" />
		</form>
EOJ;
		return $html;
	}
	private function payumoney($name, $email, $phone, $txnid, $amount, $surl, $furl){
		$posted = array('key' => 'EPAfC8', 'txnid' => $txnid, 'amount' => $amount, 'productinfo' => 'Transaction', 'firstname' => $name, 'email' => $email, 'phone' => $phone);

		$salt = '2eQBk83X';

		$hash = '';
		$hash_sequence = 'key|txnid|amount|productinfo|firstname|email|udf1|udf2|udf3|udf4|udf5|udf6|udf7|udf8|udf9|udf10';
		if(sizeof($posted) > 0):
			$hash_vars_seq = explode('|', $hash_sequence);
			$hash_string = '';
			foreach($hash_vars_seq as $hash_var):
				$hash_string .= isset($posted[$hash_var]) ? $posted[$hash_var] : '';
				$hash_string .= '|';
			endforeach;
			$hash_string .= $salt;
			$hash = strtolower(hash('sha512', $hash_string));
		endif;
$html = <<<EOJ
		<form action="https://secure.payu.in/_payment" method="post" name="redirect">
		<input type="hidden" name="key" value="EPAfC8" readonly />
		<input type="hidden" name="txnid" value="{$txnid}" readonly />
		<input type="hidden" name="amount" value="{$amount}" readonly />
		<input type="hidden" name="productinfo" value="Transaction" readonly />
		<input type="hidden" name="firstname" value="{$name}" readonly />
		<input type="hidden" name="email" value="{$email}" readonly />
		<input type="hidden" name="phone" value="{$phone}" readonly />
		<input type="hidden" name="surl" value="{$surl}" readonly />
		<input type="hidden" name="furl" value="{$furl}" readonly />
		<input type="hidden" name="hash" value="{$hash}" readonly />
		<input type="hidden" name="service_provider" value="payu_paisa" readonly />
		<input type="submit" value="Click Here" style="display:none" />
		</form>
EOJ;
		return $html;
	}
	private function twocheckout($txnid, $currency, $amount, $surl, $furl){
$html = <<<EOJ
		<form action="https://www.paypal.com/cgi-bin/webscr" method="post" name="redirect">
		<input type="hidden" name="business" value="jpbr.delhi@gmail.com" readonly />
		<input type="hidden" name="cmd" value="_xclick" readonly />
		<input type="hidden" name="item_name" value="Transaction" readonly />
		<input type="hidden" name="amount" value="{$amount}" readonly />
		<input type="hidden" name="currency_code" value="{$currency}" readonly />
		<input type="hidden" name="invoice" value="{$txnid}" readonly />
		<input type="hidden" name="return" value="{$surl}" readonly />
		<input type="hidden" name="notify_url" value="{$furl}" readonly />
		<input type="submit" value="Click Here" style="display:none" />
		</form>
EOJ;
		return $html;
	}
	private function paypal($txnid, $currency, $amount, $surl, $furl){
		$sandbox = false;
		$paypal_url = ($sandbox) ? 'https://www.sandbox.paypal.com/cgi-bin/webscr' : 'https://www.paypal.com/cgi-bin/webscr';
$html = <<<EOJ
		<form action="{$paypal_url}" method="post" name="redirect">
			<input type="hidden" name="business" value="jpbr.delhi@gmail.com">
			<input type="hidden" name="cmd" value="_xclick">
			<input type="hidden" name="item_name" value="Transaction">
			<input type="hidden" name="item_number" value="{$txnid}">
			<input type="hidden" name="amount" value="{$amount}">
			<input type="hidden" name="currency_code" value="USD">
			<input type="hidden" name="notify_url" value="https://www.akinik.com/listener">
			<input type="hidden" name="cancel_return" value="{$furl}">
			<input type="hidden" name="return" value="{$surl}">
			<input type="submit" value="Click Here" style="display:none" />
		</form>
EOJ;
		return $html;
	}
	public function set($paymentmode, $name, $email, $phone, $txnid, $currency, $amount, $surl, $furl){/*
		if($paymentmode === 'DC_CARD'):
			$html = $this->icici($name, $email, $phone, $txnid, $currency, $amount, $surl, $furl);
		elseif($paymentmode === 'NET_BANKING'):
			$html = $this->payumoney($name, $email, $phone, $txnid, $amount, $surl, $furl);
		else:
			die(output(false, 'Valid payment gateway not found. Please try again.'));
		endif;*/
		if($currency === 'INR'):
			$html = $this->payumoney($name, $email, $phone, $txnid, $amount, $surl, $furl);
		elseif($currency === 'USD'):
			$html = $this->paypal($txnid, $currency, $amount, $surl, $furl);
		else:
			die(output(false, 'Valid payment gateway not found. Please try again.'));
		endif;
		die(output(true, $html, 'html'));
	}
}
$gt = new gateway();
?>