<?php
	/**
	* This class encapsulates transaction processing with Authorize.Net.
	* @author Richard Sharp
	* @copyright 2005-2010 
	* @version 3.5
	* @package Payment
	*/
	
	/* Test Credit Card Numbers
	370000000000002 - American Express
 	6011000000000012 - Discover
 	5424000000000015 - MasterCard
 	4007000000027 - Visa
	4222222222222 - Forced Failure
 	*/


	class AuthNetGateway
	{
		//////////////////// public variables ////////////////////////////
		
		
		/**
		* Required. Sets the billing street address.
		*	@var string
		*/
		var $Address="";
		
		/**
		* Required. Sets the Amount to Charge
		*	@var decimal
		*/
		var $Amount=0;
		
		/**
		* Gets the returned apprival code.
		*	@var string
		*/
		var $ApprovalCode="";
		
		/**
		* Required. Sets the Authorize.Net API Login ID
		*	@var string
		*/
		var $AuthNetLoginID="";
		
		/**
		* Required. Sets the Authorize.Net API Transaction Key
		*	@var string
		*/
		var $AuthNetTransactionKey="";
		
		/**
		* Required. Sets the Credit Card Number. All non-numeric characters will be removed.
		*	@var string
		*/
		var $CardNumber="";
		
		/**
		* Required. Sets the billing city.
		*	@var string
		*/
		var $City="";
		
		/**
		* Optional. Sets the billing country.
		*	@var string
		*/
		var $Country="US";
		
		/**
		* Optional. Sets any custom information to be sent to Authorize.Net.
		*	@var string
		*/
		var $Custom="";
		
		/**
		* Options. Sets the Customer ID.
		*	@var string
		*/
		var $CustomerID="";
		
		/**
		* Required. Sets the transaction description.
		*	@var string
		*/
		var $Description="";
		
		/**
		* Optional. Sets the time window (in seconds) to prevent duplicate transactions. Default is 120 seconds.
		*	@var string
		*/
		var $DuplicateWindow=120;
		
		/**
		* Optional. Sets the billing email address.
		*	@var string
		*/
		var $Email="";
		
		/**
		* Required. Sets the credit card expiration date. Format: MMYY.
		*	@var string
		*/
		var $ExpirationDate="";
		
		/**
		* Required. Sets the billing first name.
		*	@var string
		*/
		var $FirstName="";
		
		/**
		* Optional. Sets the invoice number.
		*	@var string
		*/
		var $InvoiceNumber="";
		
		/**
		* Gets the error returned, if any.
		*	@var string
		*/
		var $LastError="";
		
		/**
		* Required. Sets the billing last name.
		*	@var string
		*/
		var $LastName="";
		
		/**
		* Gets the raw text of the last request sent to Authorize.Net
		*	@var string
		*/
		var $LastRequest="";
		
		/**
		* Gets the raw text of the last response from Authorize.Net
		*	@var string
		*/
		var $LastResponse="";
		
		/**
		* Optional. The billing phone number.
		*	@var string
		*/
		var $Phone="";
		
		/**
		* Gets the reason for the last response.
		*	@var string
		*/
		var $ResponseReason="";
		
		/**
		* Optional. Sets an email address to receive a copy of the confirmation.
		*	@var string
		*/
		var $MerchantReceiptEmail="";
		
		/**
		* Required. Sets the credit card security code.
		*	@var string
		*/
		var $SecurityCode="";
		
		/**
		* Required. Sets the billing state.
		*	@var string
		*/
		var $State="";
		
		/**
		* Optional. If true, the transaction will be processed in test mode.
		*	@var string
		*/
		var $Test=false;
		
		/**
		* Gets the returned Transaction ID.
		*	@var string
		*/
		var $TransactionID="";
		
		/**
		* Required. Gets the transaction Type. Possible values are: AUTH_CAPTURE, AUTH_ONLY, CAPTURE_ONLY, CREDIT, VOID, PRIOR_AUTH_CAPTURE
		*	@var string
		*/
		var $TransactionType="AUTH_CAPTURE";
		
		/**
		* Sets the billing zip code.
		*	@var string
		*/
		var $Zip="";
		
						
		///////////////////// private_variables ///////////////////////////////////
		
		/**
		* The URL to use in LIVE mdoe.
		* @access private
		*	@var string
		*/
		var $_live_url= "https://secure.authorize.net/gateway/transact.dll";
		
		/**
		* The URL to use in TEST mdoe.
		* @access private
		*	@var string
		*/
		var $_test_url= "https://test.authorize.net/gateway/transact.dll";
		
		
		//////////////////////// public functions ////////////////////////////////
		
		/**
		 * Constructor for the class.
		 * @return void
		 */ 
		function AuthNetGateway() {}
		
		/**
		 * Processes the transaction
		 * @return bool Returns true on success, false on error.
		 */ 
		function ProcessTransaction()
		{
			$ok=false;
			//validate the expiration date
			$this->ExpirationDate=preg_replace("/[^0-9]/","",$this->ExpirationDate);
			if(strlen($this->ExpirationDate)<4) $this->ExpirationDate="0".$this->ExpirationDate;
			if(strlen($this->ExpirationDate)!=4) $error[]="Invalid date. Required format: MMYY";
			
			if(!$error)
			{
				if($this->Test) $url=$this->_test_url;
				else $url=$this->_live_url;
				
				$authnet_values				= array
				(
					"x_login"				=> $this->AuthNetLoginID,
					"x_version"				=> "3.1",
					"x_delim_char"			=> "|",
					"x_delim_data"			=> "TRUE",
					"x_url"					=> "FALSE",
					"x_type"				=> $this->TransactionType,
					"x_method"				=> "CC",
					"x_tran_key"			=> $this->AuthNetTransactionKey,
					"x_relay_response"		=> "FALSE",
					"x_card_num"			=> ereg_replace("[^0-9]","",$this->CardNumber),
					"x_exp_date"			=> $this->ExpirationDate,
					"x_description"			=> $this->Description,
					"x_duplicate_window"	=> $this->DuplicateWindow,
					"x_amount"				=> $this->Amount,
					"x_invoice_num"			=> $this->InvoiceNumber,
					"x_first_name"			=> $this->FirstName,
					"x_last_name"			=> $this->LastName,
					"x_address"				=> $this->Address,
					"x_city"				=> $this->City,
					"x_state"				=> $this->State,
					"x_country"				=> $this->Country,
					"x_zip"					=> $this->Zip,
					"x_phone"					=> $this->Phone,
					"x_email"				=> $this->Email,
					"x_email_customer"			=> "FALSE",
					"SpecialCode"			=> $this->Custom,
					"x_cust_id"			=> $this->CustomerID,
					"x_merchant_email"			=> $this->MerchantReceiptEmail,
					"x_card_code"			=> $this->SecurityCode,
					"x_trans_id"			=> $this->TransactionID
				);
				if($this->Test) $authnet_values["x_test_request"]="TRUE";
				else $authnet_values["x_test_request"]="FALSE";
				
				foreach($authnet_values as $key => $value) $params[]=$key."=".urlencode($value);
				
				//connect and send the request
				$ch = curl_init($url); 
				curl_setopt($ch, CURLOPT_HEADER, 0); // set to 0 to eliminate header info from response
				curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // Returns response data instead of TRUE(1)
				curl_setopt($ch, CURLOPT_POSTFIELDS, implode("&",$params )); // use HTTP POST to send form data
				$resp = curl_exec($ch); //execute post and get results
				curl_close ($ch);
				
				$this->LastRequest=implode("&",$params);
				$this->LastResponse = $resp;
				
				//parse the response
				$response_parts=explode("|",$resp);
				if($response_parts[0]==1) //approved
				{
					$this->ApprovalCode=$response_parts[4];
					$this->TransactionID=$response_parts[6];
					$this->ResponseReason="The transaction has been approved.";
					$ok=true;
				}
				else //declined
				{
					switch($response_parts[2])
					{
						case 5:
							$this->ResponseReason="A valid amount is required.";
							break;
						case 6:
							$this->ResponseReason="The credit card number is invalid.";
							break;
						case 7:
							$this->ResponseReason="The credit card expiration date is invalid.";
							break;
						case 8:
							$this->ResponseReason="The credit card has expired.";
							break;
						case 11:
							$this->ResponseReason="A duplicate transaction has been submitted.";
							break;
						case 12:
							$this->ResponseReason="An authorization code is required but not present.";
							break;
						case 13:
							$this->ResponseReason="The merchant API login ID is invalid or the account is inactive.";
							break;
						case 15:
							$this->ResponseReason="The transaction ID is invalid.";
							break;
						case 16:
							$this->ResponseReason="The transaction was not found.";
							break;
						case 17:
							$this->ResponseReason="The merchant does not accept this type of credit card.";
							break;
						case 27:
							$this->ResponseReason="The transaction resulted in an AVS mismatch. The address provided does not match billing address of cardholder.";
							break;
						case 28:
							$this->ResponseReason="The merchant does not accept this type of credit card.";
							break;
						case 36:
							$this->ResponseReason="The authorization was approved, but settlement failed.";
							break;
						case 37:
							$this->ResponseReason="The credit card number is invalid.";
							break;
						case 42:
							$this->ResponseReason="There is missing or invalid information in a required field.";
							break;
						case 47:
							$this->ResponseReason="The amount requested for settlement may not be greater than the original amount authorized.";
							break;
						case 48:
							$this->ResponseReason="This processor does not accept partial reversals.";
							break;
						case 50:
							$this->ResponseReason="This transaction is awaiting settlement and cannot be refunded.";
							break;
						case 51:
							$this->ResponseReason="The sum of all credits against this transaction is greater than the original transaction amount.";
							break;
						case 52:
							$this->ResponseReason="The transaction was authorized, but the client could not be notified; the transaction will not be settled.";
							break;
						case 55:
							$this->ResponseReason="The sum of credits against the referenced transaction would exceed the original debit amount.";
							break;
						default:
							$this->ResponseReason="The transaction has been declined.";
							break;
					}
				}
			}
			if($error) $this->LastError=$error;
			return($ok);
		}
	}
?>