<?php
if(!defined('QUINTACMS') ) die('No Quinta.');

if (!defined("PAYPALNVPACTION.CLASS.PHP")){
define("PAYPALNVPACTION.CLASS.PHP",1);

/**
* Class PayPalNVPAction - PayPal  NVP API  action
*
* This class provides an interface to the PayPal NVP API.
*
* @todo - meaningful comments .. we do a bunch of stuff here:
*  connect, redirect, handle returns, save transaction ..etc.
*   
* 
*@author Erik Winn <sidewalksoftware@gmail.com>
*
*@version 0.3
*
*@package Quinta
* @subpackage Classes
*/

	class PayPalNVPAction extends PaymentActionBase{
		/**
		* @var array Name - Value pairs with which to construct GET query strings
		*/
		protected $aryRequestValues = array(
		'USER' => '',
		'PWD' => '',
		'PAYERID' => '',
		'VERSION' => PAYPAL_NVP_VERSION,
		'PAYMENTACTION' => 'Sale', //Sale | Autorization | Order
		'METHOD' => '', //API method - REQUIRED
		'TOKEN' => '',     //transaction token, returned in response - OPTIONAL/required with get/doExpressCheckout ..
		'AMT' => '',           // total purchase amount, including tax and shipping - REQUIRED
		'CURRENCYCODE' => 'USD', //AUD, CAD, CHF, CZK, DKK, EUR, GBP, HKD, HUF, JPY, NOK, NZD, PLN, SEK, SGD
		'RETURNURL' => '', //URL to which customer is returned after paying - REQUIRED
		'CANCELURL' => '', //URL to which customer is returned if they cancel - REQUIRED
		'NOTIFYURL' => '', //URL for receiving Instant Payment Notification - optional
		'IPADDRESS' => '', // Local ServerName 
		'MAXAMT' => '', // The expected maximum total amount of the complete order - OPTIONAL
		'DESC' => '', // Description of purchase - OPTIONAL
		'CUSTOM' => '', // Custom data, whatever you like, returned by GetExpressCheckoutDetails - OPTIONAL
		'INVNUM' => '', // Invoice or Order number returned by DoExpressCheckoutPayment - OPTIONAL
		'REQCONFIRMSHIPPING' => '', //Require PayPal to confirm customers address (filed at PayPal) - OPTIONAL
		'NOSHIPPING' => '', //If true (1), PayPal is to display no shipping address info - OPTIONAL
		'ALLOWNOTE' => '', //If true (1) user can add a note returned by GetExpressCheckoutDetails - OPTIONAL
		'ADDRESSOVERRIDE' => '', //If true (1), PayPal displays address sent with request - OPTIONAL
		'LOCALECODE' => '', //Display PayPal pages using this locale (AU, FR, DE, GB, IT, ES, US) -  OPTIONAL
		'PAGESTYLE' => '', //page style from the Profile subtab of the My Account tab - OPTIONAL
		'HDRIMG' => '', // (https) URL for the image to appear at the top left of the payment page. - OPTIONAL
		'HDRBORDERCOLOR' => '', //Sets the border color around the header of the payment page.- OPTIONAL
		'HDRBACKCOLOR' => '', // Sets the background color for the header of the payment page - OPTIONAL
		'PAYFLOWCOLOR' => '', // Sets the background color for the payment page - OPTIONAL
		'EMAIL' => '', // Email address of the buyer to prefill field at PayPal - OPTIONAL
		'LANDINGPAGE' => '', //Type of PayPal page to display ("Billing" for non-PayPal account else "Login") - OPTIONAL
		'SHIPTONAME' => '', // (Customer name associated with shipping address - REQUIRED
		'SHIPTOSTREET' => '', //First street address - REQUIRED
		'SHIPTOSTREET2' => '', //Second street address - OPTIONAL
		'SHIPTOCITY' => '', // Name of city. -REQUIRED
		'SHIPTOSTATE' => '', // Name of state. -REQUIRED
		'SHIPTOZIP' => '', // Postal code. -REQUIRED
		'SHIPTOCOUNTRY' => '', // Country. -REQUIRED
		'ITEMAMT' => '', //Sum of cost of all items in this order, REQUIRED if you use L_AMTn or shipping etc. ...
		'SHIPPINGAMT' => '', //Total shipping costs for this order - optional.
		'HANDLINGAMT' => '', //Total handling costs for this order - optional
		'TAXAMT' => '', //Sum of tax for all items in this order - optional
		);

		/**
		* 
		* @var array Response values will be stored here 
		*/
		protected $aryResponseValues;
		/**
		* PayPal transaction ORM object for logging transactions ..
		* @var PaypalTransaction - represents the paypal_transaction table ..
		*/
		protected $objPaypalTransaction;
		
		/**
		* The following are base strings for constructing multiple item requests, eg. L_NAME0, L_NAME1, etc...
		* All are optional.
		*/
		protected $strItemName = 'L_NAME';
		protected $strItemDescBase = 'L_DESC';
		protected $strItemAmountBase = 'L_AMT';
		protected $strItemQuantityBase = 'L_QTY';
		protected $strItemNumberBase = 'L_NUMBER';
		protected $strItemTaxBase = 'L_TAXAMT';

		protected $blnShowShippingAddress = false;
		
		/**
		* PayPalNVPAction Constructor
		*
		* This sets various defaults specific to the NVP API
		*
		* @param Order objOrder - the Order to process
		*/
		public function __construct(Order $objOrder){
			try {
				parent::__construct($objOrder);
			} catch (QCallerException $objExc) {
				$objExc->IncrementOffset();
				throw $objExc;
			}
			
			$this->blnTestMode = $objOrder->PaymentMethod->TestMode;
			if($this->TestMode){
				$this->strRedirectDomainName = PAYPAL_REDIRECT_TESTURL;
				$this->aryRequestValues['USER'] = PAYPAL_NVP_TESTUSERNAME;
				$this->aryRequestValues['PWD'] = PAYPAL_NVP_TESTPASSWORD;
				if('' != PAYPAL_NVP_TESTSIGNATURE){
					$this->aryRequestValues['SIGNATURE'] = PAYPAL_NVP_TESTSIGNATURE;
					$this->strRemoteDomainName = PAYPAL_NVP_TESTURL;
				}else{
					$this->UseCurl = true;
					$this->UseSslCertificate = true;
					$this->strRemoteDomainName = PAYPAL_NVP_CURL_TESTURL;
					$this->strSslCertificateUri = PAYPAL_CERT_TESTPATH;
				}
			}else{
				/// FIXME: put these somewhere safer and load it .. currently in config file!
				$this->strRedirectDomainName = PAYPAL_REDIRECT_URL;
				$this->aryRequestValues['USER'] = PAYPAL_NVP_USERNAME;
				$this->aryRequestValues['PWD'] = PAYPAL_NVP_PASSWORD;
				if('' != PAYPAL_NVP_TESTSIGNATURE){
					$this->aryRequestValues['SIGNATURE'] = PAYPAL_NVP_SIGNATURE;
					$this->strRemoteDomainName = PAYPAL_NVP_URL;
				}else{
					$this->UseCurl = true;
					$this->UseSslCertificate = true;
					$this->strRemoteDomainName = PAYPAL_NVP_CURL_URL;
					$this->strSslCertificateUri = PAYPAL_CERT_PATH;
				}
			}
			
			$this->strRemoteCgiUrl = '/nvp';
			$this->strRequestType = 'POST';

			$this->aryRequestValues['IPADDRESS'] = Quinta::$ServerName;
			//unused ..
			$this->strTemplateUri = __QUINTA_CORE_VIEWS__ . '/PayPalNVPAction.tpl.php';
		}
				
	   /**
		* The createRequest functions are handled by separate functions which create requests
		* by stage as they may occur before and after a customer is redirected to PayPal and may
		* therefor be two separate requests. 
		*/        
		protected function createPOSTRequest(){}
		protected function createGETRequest(){}
		
		/**
		* Performs any preparation steps prior to submitting an actual payment.
		* Eg. We submit a call to the SetExpressCheckoutDetails API here and set up
		* the values for the transaction. If successful, aryResponseValues['TOKEN']
		* will contain the identifier for the transaction.
		*@return bool true on success  
		*/        
		public function PreProcess(){}
		/**
		*@return bool true on success
		*/        
		public function Process(){}
		/**
		* Performs any steps necessary after submitting an actual payment. For example
		* the PayPal Express Checkout redirects the user here ..
		*@return bool true on success  
		*/        
		public function PostProcess(){}
		/**
		* Parses the direct API response from PayPal into an array of values. This also inserts an entry
		* into the paypal_transaction table and initializes the PaypalTransaction object to which other
		* functions may refer for information returned concerning the transaction.
		*
		*@todo
		*   - handle errors gracefully !!
		*   - L_ERRORCODE0=81100&L_SHORTMESSAGE0=Missing%20Parameter&L_LONGMESSAGE0
		*       errornumber: 10415 - transaction already completed for token
		*  
		*   - optionally save address values from PP and use address confirmation ... this ain't gonna be
		*     soon since it requires a whole reworking of the scheme to put shipping options after redirect
		*     and adding the shipping charge.. ick, i have pp slime on my keyboard ..
		*@return boolean true if the response was successfully parsed.
		*/        
		protected function handleResponse(){
			$this->aryResponseValues = array();
			$strResponseRaw = $this->strResponse;
			
			$this->strResponse = urldecode($this->strResponse);
			$pos = strpos($this->strResponse, "TOKEN=" );
			if( false === $pos ){
				$this->HasErrors = true;
				return false;
			}
			$this->strResponse = substr( $this->strResponse, $pos);
			
			//split up the string and store the values in a map ..
			$aryTokens = explode('&', $this->strResponse );
			foreach($aryTokens as $strToken){
				$aryTemp = explode('=', $strToken);
				$this->aryResponseValues[$aryTemp[0]] = $aryTemp[1];
			}                
			if( empty($this->aryResponseValues) ){
				$this->HasErrors = true;
				$this->strErrors .= 'Response: ' . $strResponseRaw;
				return false;
			}
			
			//initialize a transaction logging object ..
			$this->objPaypalTransaction = new PaypalTransaction();
			$this->objPaypalTransaction->OrderId = $this->objOrder->Id;
			$this->objPaypalTransaction->PaymentMethodId = $this->objOrder->PaymentMethodId;
			$this->objPaypalTransaction->ApiAction = $this->aryRequestValues['METHOD'];
			$this->objPaypalTransaction->ApiVersion = $this->aryResponseValues['VERSION'];
			$this->objPaypalTransaction->CorrelationId = $this->aryResponseValues['CORRELATIONID'];
			$this->objPaypalTransaction->AckReturned = $this->aryResponseValues['ACK'];
			//clean up the timestamp .. note: the settor converts this to a QDateTime 
			$strDateTime = str_replace('T',' ', $this->aryResponseValues['TIMESTAMP']);
			$this->objPaypalTransaction->TimeStamp = $strDateTime;
			
			$this->checkAckReturned();
			
			if($this->HasErrors){
				foreach($this->aryResponseValues as $strName => $strValue)
					if( false !== strpos( $strName, 'L_ERRORCODE') || false !== strpos( $strName, 'MESSAGE') )
						$this->strErrors .= '<br />' . $strName . ': ' . $strValue;
				
				$this->objPaypalTransaction->Messages = $this->strErrors;
				$this->objPaypalTransaction->Save();
				return false;
			}
						
			//server transaction ok, finish with the payment ..
			switch(strtoupper($this->objPaypalTransaction->ApiAction)){
				case 'DOEXPRESSCHECKOUTPAYMENT':
					$this->objPaypalTransaction->PaymentStatus = $this->aryResponseValues['PAYMENTSTATUS'];
					$this->objPaypalTransaction->PpToken = $this->aryResponseValues['TOKEN'];
					break;
				case 'GETEXPRESSCHECKOUTDETAILS':
					$this->objPaypalTransaction->PayerId = $this->aryResponseValues['PAYERID'];
					$this->objPaypalTransaction->PayerStatus = $this->aryResponseValues['PAYERSTATUS'];
				case 'SETEXPRESSCHECKOUT':
					$this->objPaypalTransaction->PpToken = $this->aryResponseValues['TOKEN'];
					break;
				default:
					//unsupported method ..
			}            
			$this->objPaypalTransaction->Save();
			return true;
		}
		
		protected function checkAckReturned(){
			$strAck =$this->objPaypalTransaction->AckReturned ;
			if( '' == $strAck)
				$this->HasErrors = true;
			else{
				switch( strtoupper( $strAck )){
					case 'SUCCESS':
					case 'SUCCESSWITHWARNING':
						$this->HasErrors = false;
						break;
					case 'FAILURE':
					case 'FAILUREWITHWARNING':
						$this->HasErrors = true;
						break;
					default:
						//error ..                    
						$this->HasErrors = true;
				}
			}        
			return ! $this->HasErrors;
		}
		
		public function __get($strName){
			switch ($strName){
				case 'PaypalTransaction':
					return $this->objPaypalTransaction;
				case 'ShowShippingAddress':
					return $this->blnShowShippingAddress;
				default:
					 try {
						return parent::__get($strName);
					 } catch (QCallerException $objExc) {
						$objExc->IncrementOffset();
						throw $objExc;
					 }
			}
		}
		
		public function __set($strName, $mixValue){
			switch ($strName){
				case 'ShowShippingAddress':
					try {
						$this->blnShowShippingAddress = QType::Cast($mixValue, QType::Boolean );
					} catch (QInvalidCastException $objExc) {
						$objExc->IncrementOffset();
						throw $objExc;
					}
					//careful, its backwards ..
					$this->aryRequestValues['NOSHIPPING'] = (true === $mixValue) ? 0 : 1;
				default:
					try {
						return (parent::__set($strName, $mixValue));
					} catch (QCallerException $objExc) {
						$objExc->IncrementOffset();
						throw $objExc;
					}
			}
		}
	
	}//end class
}//end define

?>