<?php
/*
+--------------------------------------------------------------------------
|   CubeCart 4
|   ========================================
|	CubeCart is a registered trade mark of Devellion Limited
|   Copyright Devellion Limited 2006. All rights reserved.
|   Devellion Limited,
|   5 Bridge Street,
|   Bishops Stortford,
|   HERTFORDSHIRE.
|   CM23 2JU
|   UNITED KINGDOM
|   http://www.devellion.com
|	UK Private Limited Company No. 5323904
|   ========================================
|   Web: http://www.cubecart.com
|   Email: info (at) cubecart (dot) com
|	License Type: CubeCart is NOT Open Source Software and Limitations Apply 
|   Licence Info: http://www.cubecart.com/site/faq/license.php
+--------------------------------------------------------------------------
|	validateCard.php
|   ========================================
|	Class to Validate Credit Card
+--------------------------------------------------------------------------
*/
class validateCard {

	var $data;
	function check($cardNo, $issueNo='', $issueDate='', $issueFormat=4, $expireDate='', $expireFormat=4, $scReqd=false, $securityCode='') {
		
		$cardNo = ereg_replace("[^0-9]", '', $cardNo); 
		
		## Assume success unless a rule is broken
		$this->data['response'] = "SUCCESS";
		
		## check expire date (always required)
		$this->expireDate($expireDate,$expireFormat);
		
		if ($scReqd == true) $this->securityCode($securityCode);
		
		/************************************************
		 * BEGIN: Regular Expressions to validate Certain Cards
		 ************************************************/
		
		$mastercard 		=	"^5[1-5][0-9]{14}$";
		$visa 				= 	"^4[0-9]{12}([0-9]{3})?$";
		// $americanExpress 	= 	"^3[47][0-9]{13}$"; old in 4.0.3
		//$americanExpress 	= 	"((^3[47])|(^3[34])|(^3[37]))((\d{11}$)|(\d{13}$))";
		$americanExpress    =   "^[34|37|47]([0-9]{14}|[0-9]{12})$";
		$diners 			= 	"^3(0[0-5]|[68][0-9])[0-9]{11}$";
		$discover 			= 	"^6011[0-9]{12}$";
		$jcb 				= 	"^(3[0-9]{4}|2131|1800)[0-9]{11}$";
		$australianBankCard =	"^5610([0-9]{12})?$";
		$enRoute 			= 	"^(2014|2149)([0-9]{11})?$";
		$electron 			= 	"^(450875|48440[6-9]{1}|4844[1-4]{1}[0-9]{1}|48445[0-5]{1}|4917[3-5]{1}[0-9]{1}|491880|5[1-5]{1})([0-9]{10}|[0-9]{14})?$";//
		$delta 				= 	"^(41373[3-7]{1}|4462[0-9]{2}|45397[8-9]{1}|454313|45443[2-5]{1}|454742|45672[5-9]{1}|45673[0-9]{1}|45674[0-5]{1}|4658[3-7]{1}[0-9]{1}|4659[0-5]{1}[0-9]{1}|4609[6-7]{1}[0-9]{1}|49218[1-2]{1}|498824)([0-9]{10})?$";
		$solo 				= 	"^(6334[5-9]{1}[0-9]{1}|6767[0-9]{2}|3528[0-9]{2})([0-9]{10})?$";
		$maestro 			= 	"^(5000[0-9]{2}|5[6-8]{1}|6[0-9]{5})([0-9]{10}|[0-9]{14})?$";
		$switch 			= 	"^(49030[2-9]{1}|49033[5-9]{1}|49110[1-2]{1}|49117[4-9]{1}|49118[0-2]{1}|4936[0-9]{2}|564182|6333[1-4]{1}[0-9]{1}|6759[0-9]{2})([0-9]{10}|[0-9]{12}|[0-9]{13})?$";
		
		/************************************************
		 * END: Regular Expressions to validate Certain Cards
		 ************************************************/
		
		if (empty($cardNo)) {
			$this->error(6);
		} elseif (ereg($mastercard, $cardNo)) {
			$this->mod10($cardNo);
			$this->data['cardType'] = "MASTERCARD";
			
		} elseif (ereg($electron, $cardNo)) {
			$this->data['cardType'] = "ELECTRON";
			
		} elseif(ereg($visa, $cardNo)) {
			## mod 10 fails on 13 length card nos :( Booooooooooooooooooooooooooooo
			if (strlen($cardNo) !== 13) $this->mod10($cardNo);
			$this->data['cardType'] = "VISA";
			
		} elseif (ereg($americanExpress, $cardNo)) {
			$this->mod10($cardNo);
			$this->data['cardType'] = "AMERICAN EXPRESS";

   		} elseif (ereg($diners, $cardNo)) {
			$this->mod10($cardNo);
			$this->data['cardType'] = "DINERS";
		
		} elseif (ereg($discover, $cardNo)) {
			$this->mod10($cardNo);
			$this->data['cardType'] = "DISCOVER";
		
		} elseif (ereg($enRoute, $cardNo)) {
			$this->data['cardType'] = "ENROUTE";

		} elseif (ereg($jcb, $cardNo)) {
			$this->mod10($cardNo);
			$this->data['cardType'] = "JCB";
		
		} elseif (ereg($australianBankCard, $cardNo)) {
			$this->data['cardType'] = "AUSTRALIAN BANK CARD";
		
		} elseif (ereg($delta, $cardNo)) {
			$this->data['cardType'] = "DELTA";
		
		} elseif (ereg($switch, $cardNo)) {
			$this->mod10($cardNo);
			$this->data['cardType'] = "SWITCH"; 
			
			## switch/maestro/solo requires an issue date or number
			if (!$this->issueDate($issueDate,$issueFormat) || !$this->issueNo($issueNo)) $this->error(3);
			
		} elseif (ereg($solo, $cardNo)) {
			$this->mod10($cardNo);
			$this->data['cardType'] = "SOLO"; 
			
			## switch/maestro/solo requires an issue date or number
			if (!$this->issueDate($issueDate,$issueFormat) || !$this->issueNo($issueNo)) $this->error(3);
			
		} elseif (ereg($maestro, $cardNo)) {
			$this->mod10($cardNo);
			$this->data['cardType'] = "MAESTRO"; 
			
			## switch/maestro/solo requires an issue date or number
			if (!$this->issueDate($issueDate,$issueFormat) || !$this->issueNo($issueNo)) $this->error(3);
		} else {
			$this->error(1);
		}
		return $this->data;
	}
	
	// LUHN formula
	function mod10($cardNo) {
		
		$numSum = 0;
		
		for($i = 0; $i < strlen($cardNo); $i++) {

		$currentNum = substr($cardNo, $i, 1);
		
			if($i % 2 == 1) {
			  $currentNum *= 2;
			}
			
			if($currentNum > 9) {
			  $firstNum = $currentNum % 10;
			  $secondNum = ($currentNum - $firstNum) / 10;
			  $currentNum = $firstNum + $secondNum;
			}
		
		$numSum += $currentNum;
		
		}
		
		$passCheck = ($numSum % 10 == 0);

		if($passCheck == 0){
		
			return true;
		
		} else {
		
			$this->error(5);
			return false;	
		
		}
		
	}
	
	function expireDate($expireDate,$expireFormat){
		
		if(strlen($expireDate) !== $expireFormat){
			
			$this->error(2);
			return false;
			
		} elseif($expireFormat == 4 && $expireDate<date("ym")) {

			$this->error(2);
			return false;
		
		} elseif($expireFormat == 6 && $expireDate<date("Ym")) {
		
			$this->error(2);
			return false;
		
		} else {
			
			return true;
		
		}
	
	}
	
	function issueDate($issueDate,$issueFormat) {
	
		
		if(strlen($issueDate) !== $issueFormat){
			
			$this->error(3);
			return false;
			
		} elseif($issueFormat == 4 && $issueDate>date("ym")) {
			
			$this->error(3);
			return false;
		
		} elseif($issueFormat == 6 && $issueDate>date("Ym")) {
			
			$this->error(3);		
			return false;
		
		} else {
		
			return true;
		
		} 
	
	}
	
	function issueNo($issueNo) {

		if($issueNo>0){
			
			return true;
			
		} else {
		
			return false;
		
		}
	
	}
	
	function securityCode($securityCode) {

		if(($securityCode>0 && $securityCode<10000) && (strlen($securityCode)==3 || strlen($securityCode)==4)) {
			
			return true;
			
		} else {
		
			$this->error(4);
		
		}
	
	}
	
	function error($errorCode) {
		
		global $lang;
		
		$this->data['response'] = "FAIL";
		
		switch($errorCode) {
			case(1):
			
				$this->data['error'][1] = "Card not recognised!";
				
			break;
			
			case(2):
			
				$this->data['error'][2] = "No expiry date was entered or it wasn't valid.";
				
			break;
			
			case(3):
			
				$this->data['error'][3] = "Please enter a valid issue number or date.";
				
			break;
			
			case(4):
			
				$this->data['error'][4] = "Please enter a valid security code.";
				
			break;
			
			case(5):
			
				$this->data['error'][5] = "Credit card number is not valid.";
				
			break;
			
			case(6):
			
				$this->data['error'][5] = "Please enter a card number.";
				
			break;
		
		}
	
	}

}
?>