<?php

/* * ******************************************
  PayPal API Module
  Defines all the global variables and the wrapper functions
 * ****************************************** */
global $API_Endpoint, $version, $API_UserName, $API_Password, $API_Signature, $PAYPAL_URL;
global $USE_PROXY, $PROXY_HOST, $PROXY_PORT;
global $gv_ApiErrorURL;
global $sBNCode;
$PROXY_HOST = '127.0.0.1';
$PROXY_PORT = '808';
$sandbox_flag = (PAYPAL_SANDBOX_STATUS == 1) ? 'true' : 'false';
$SandboxFlag = $sandbox_flag;
//'------------------------------------
//' PayPal API Credentials
//' Replace <API_USERNAME> with your API Username
//' Replace <API_PASSWORD> with your API Password
//' Replace <API_SIGNATURE> with your Signature
//'------------------------------------
$API_UserName = PAYPAL_USERNAME;
$API_Password = PAYPAL_PASSWORD;
$API_Signature = PAYPAL_SIGNATURE;
// BN Code 	is only applicable for partners
$sBNCode = "PP-ECWizard";
/* 	
  ' Define the PayPal Redirect URLs.
  ' 	This is the URL that the buyer is first sent to do authorize payment with their paypal account
  ' 	change the URL depending if you are testing on the sandbox or the live PayPal site
  '
  ' For the sandbox, the URL is       https://www.sandbox.paypal.com/webscr&cmd=_express-checkout&token=
  ' For the live site, the URL is        https://www.paypal.com/webscr&cmd=_express-checkout&token=
 */

if ($SandboxFlag == true) {
    $API_Endpoint = "https://api-3t.sandbox.paypal.com/nvp";
    $PAYPAL_URL = "https://www.sandbox.paypal.com/webscr?cmd=_express-checkout&token=";
} else {
    $API_Endpoint = "https://api-3t.paypal.com/nvp";
    $PAYPAL_URL = "https://www.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=";
}

$USE_PROXY = false;
$version = "93";
if (session_id() == "")
    session_start();
/* An express checkout transaction starts with a token, that
  identifies to PayPal your transaction
  In this example, when the script sees a token, the script
  knows that the buyer has already authorized payment through
  paypal.  If no token was found, the action is to send the buyer
  to PayPal to first authorize payment
 */
/*
  '-------------------------------------------------------------------------------------------------------------------------------------------
  ' Purpose: 	Prepares the parameters for the SetExpressCheckout API Call.
  ' Inputs:
  '		paymentAmount:  	Total value of the shopping cart
  '		currencyCodeType: 	Currency code value the PayPal API
  '		paymentType: 		paymentType has to be one of the following values: Sale or Order or Authorization
  '		returnURL:			the page where buyers return to after they are done with the payment review on PayPal
  '		cancelURL:			the page where buyers return to when they cancel the payment review on PayPal
  '--------------------------------------------------------------------------------------------------------------------------------------------
 */

function CallShortcutExpressCheckout($paymentAmount, $currencyCodeType, $paymentType, $returnURL, $cancelURL,$campaignName) {
    //------------------------------------------------------------------------------------------------------------------------------------
    // Construct the parameter string that describes the SetExpressCheckout API call in the shortcut implementation
    $nvpstr = "&PAYMENTREQUEST_0_AMT=" . $paymentAmount;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_PAYMENTACTION=" . $paymentType;
    $nvpstr = $nvpstr . "&RETURNURL=" . $returnURL;
    $nvpstr = $nvpstr . "&CANCELURL=" . $cancelURL;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_CURRENCYCODE=" . $currencyCodeType;
    
    $nvpstr = $nvpstr . "&NOSHIPPING=1";
    $nvpstr = $nvpstr . "&L_PAYMENTREQUEST_0_NAME0='$campaignName'";
    $nvpstr = $nvpstr ."&L_PAYMENTREQUEST_0_AMT0= $paymentAmount";
    
    $_SESSION["currencyCodeType"] = $currencyCodeType;
    $_SESSION["PaymentType"] = $paymentType;
//echopre($nvpstr);
    //'--------------------------------------------------------------------------------------------------------------- 
    //' Make the API call to PayPal
    //' If the API call succeded, then redirect the buyer to PayPal to begin to authorize payment.  
    //' If an error occured, show the resulting errors
    //'---------------------------------------------------------------------------------------------------------------
    $resArray = hash_call("SetExpressCheckout", $nvpstr);
    $ack = strtoupper($resArray["ACK"]);
    if ($ack == "SUCCESS" || $ack == "SUCCESSWITHWARNING") {
        $token = urldecode($resArray["TOKEN"]);
        $_SESSION['TOKEN'] = $token;
    }
   return $resArray;
}

/*
  '-------------------------------------------------------------------------------------------------------------------------------------------
  ' Purpose: 	Prepares the parameters for the SetExpressCheckout API Call.
  ' Inputs:
  '		paymentAmount:  	Total value of the shopping cart
  '		currencyCodeType: 	Currency code value the PayPal API
  '		paymentType: 		paymentType has to be one of the following values: Sale or Order or Authorization
  '		returnURL:			the page where buyers return to after they are done with the payment review on PayPal
  '		cancelURL:			the page where buyers return to when they cancel the payment review on PayPal
  '		shipToName:		the Ship to name entered on the merchant's site
  '		shipToStreet:		the Ship to Street entered on the merchant's site
  '		shipToCity:			the Ship to City entered on the merchant's site
  '		shipToState:		the Ship to State entered on the merchant's site
  '		shipToCountryCode:	the Code for Ship to Country entered on the merchant's site
  '		shipToZip:			the Ship to ZipCode entered on the merchant's site
  '		shipToStreet2:		the Ship to Street2 entered on the merchant's site
  '		phoneNum:			the phoneNum  entered on the merchant's site
  '--------------------------------------------------------------------------------------------------------------------------------------------
 */
function CallMarkExpressCheckout($paymentAmount, $currencyCodeType, $paymentType, $returnURL, $cancelURL, $shipToName, $shipToStreet, $shipToCity, $shipToState, $shipToCountryCode, $shipToZip, $shipToStreet2, $phoneNum
) {
    //------------------------------------------------------------------------------------------------------------------------------------
    // Construct the parameter string that describes the SetExpressCheckout API call in the shortcut implementation
    $nvpstr = "&PAYMENTREQUEST_0_AMT=" . $paymentAmount;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_PAYMENTACTION=" . $paymentType;
    $nvpstr = $nvpstr . "&RETURNURL=" . $returnURL;
    $nvpstr = $nvpstr . "&CANCELURL=" . $cancelURL;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_CURRENCYCODE=" . $currencyCodeType;
    $nvpstr = $nvpstr . "&ADDROVERRIDE=1";
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_SHIPTONAME=" . $shipToName;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_SHIPTOSTREET=" . $shipToStreet;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_SHIPTOSTREET2=" . $shipToStreet2;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_SHIPTOCITY=" . $shipToCity;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_SHIPTOSTATE=" . $shipToState;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_SHIPTOCOUNTRYCODE=" . $shipToCountryCode;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_SHIPTOZIP=" . $shipToZip;
    $nvpstr = $nvpstr . "&PAYMENTREQUEST_0_SHIPTOPHONENUM=" . $phoneNum;

    $_SESSION["currencyCodeType"] = $currencyCodeType;
    $_SESSION["PaymentType"] = $paymentType;
    //'--------------------------------------------------------------------------------------------------------------- 
    //' Make the API call to PayPal
    //' If the API call succeded, then redirect the buyer to PayPal to begin to authorize payment.  
    //' If an error occured, show the resulting errors
    //'---------------------------------------------------------------------------------------------------------------
    $resArray = hash_call("SetExpressCheckout", $nvpstr);
    $ack = strtoupper($resArray["ACK"]);
    if ($ack == "SUCCESS" || $ack == "SUCCESSWITHWARNING") {
        $token = urldecode($resArray["TOKEN"]);
        $_SESSION['TOKEN'] = $token;
    }
    return $resArray;
}

/*
  '-------------------------------------------------------------------------------------------
  ' Purpose: 	Prepares the parameters for the GetExpressCheckoutDetails API Call.
  '
  ' Inputs:
  '		None
  ' Returns:
  '		The NVP Collection object of the GetExpressCheckoutDetails Call Response.
  '-------------------------------------------------------------------------------------------
 */
function GetShippingDetails($token) {
    //'--------------------------------------------------------------
    //' At this point, the buyer has completed authorizing the payment
    //' at PayPal.  The function will call PayPal to obtain the details
    //' of the authorization, incuding any shipping information of the
    //' buyer.  Remember, the authorization is not a completed transaction
    //' at this state - the buyer still needs an additional step to finalize
    //' the transaction
    //'--------------------------------------------------------------
    //'---------------------------------------------------------------------------
    //' Build a second API request to PayPal, using the token as the
    //'  ID to get the details on the payment authorization
    //'---------------------------------------------------------------------------
    $nvpstr = "&TOKEN=" . $token;
    //'---------------------------------------------------------------------------
    //' Make the API call and store the results in an array.  
    //'	If the call was a success, show the authorization details, and provide
    //' 	an action to complete the payment.  
    //'	If failed, show the error
    //'---------------------------------------------------------------------------
    $resArray = hash_call("GetExpressCheckoutDetails", $nvpstr);
    $ack = strtoupper($resArray["ACK"]);
    if ($ack == "SUCCESS" || $ack == "SUCCESSWITHWARNING") {
        $_SESSION['payer_id'] = $resArray['PAYERID'];
    }
    return $resArray;
}

/*
  '-------------------------------------------------------------------------------------------------------------------------------------------
  ' Purpose: 	Prepares the parameters for the GetExpressCheckoutDetails API Call.
  '
  ' Inputs:
  '		sBNCode:	The BN code used by PayPal to track the transactions from a given shopping cart.
  ' Returns:
  '		The NVP Collection object of the GetExpressCheckoutDetails Call Response.
  '--------------------------------------------------------------------------------------------------------------------------------------------
 */
function ConfirmPayment($FinalPaymentAmt) {
    /* Gather the information to make the final call to
      finalize the PayPal payment.  The variable nvpstr
      holds the name value pairs
     */
    //Format the other parameters that were stored in the session from the previous calls	
    $token = urlencode($_SESSION['TOKEN']);
    $paymentType = urlencode($_SESSION['PaymentType']);
    $currencyCodeType = urlencode($_SESSION['currencyCodeType']);
    $payerID = urlencode($_SESSION['payer_id']);
    $serverName = urlencode($_SERVER['SERVER_NAME']);
    $nvpstr = '&TOKEN=' . $token . '&PAYERID=' . $payerID . '&PAYMENTREQUEST_0_PAYMENTACTION=' . $paymentType . '&PAYMENTREQUEST_0_AMT=' . $FinalPaymentAmt;
    $nvpstr .= '&PAYMENTREQUEST_0_CURRENCYCODE=' . $currencyCodeType . '&IPADDRESS=' . $serverName;
    /* Make the call to PayPal to finalize payment
      If an error occured, show the resulting errors
     */
    $resArray = hash_call("DoExpressCheckoutPayment", $nvpstr);
    /* Display the API response back to the browser.
      If the response from PayPal was a success, display the response parameters'
      If the response was an error, display the errors received using APIError.php.
     */
    $ack = strtoupper($resArray["ACK"]);
    return $resArray;
}

/*
  '-------------------------------------------------------------------------------------------------------------------------------------------
  ' Purpose: 	This function makes a DoDirectPayment API call
  '
  ' Inputs:
  '		paymentType:		paymentType has to be one of the following values: Sale or Order or Authorization
  '		paymentAmount:  	total value of the shopping cart
  '		currencyCode:	 	currency code value the PayPal API
  '		firstName:			first name as it appears on credit card
  '		lastName:			last name as it appears on credit card
  '		street:				buyer's street address line as it appears on credit card
  '		city:				buyer's city
  '		state:				buyer's state
  '		countryCode:		buyer's country code
  '		zip:				buyer's zip
  '		creditCardType:		buyer's credit card type (i.e. Visa, MasterCard ... )
  '		creditCardNumber:	buyers credit card number without any spaces, dashes or any other characters
  '		expDate:			credit card expiration date
  '		cvv2:				Card Verification Value
  '
  '-------------------------------------------------------------------------------------------
  '
  ' Returns:
  '		The NVP Collection object of the DoDirectPayment Call Response.
  '--------------------------------------------------------------------------------------------------------------------------------------------
 */

function DirectPayment($paymentType, $paymentAmount, $creditCardType, $creditCardNumber, $expDate, $cvv2, $firstName, $lastName, $street, $city, $state, $zip, $countryCode, $currencyCode) {
    //Construct the parameter string that describes DoDirectPayment
    $nvpstr = "&AMT=" . $paymentAmount;
    $nvpstr = $nvpstr . "&CURRENCYCODE=" . $currencyCode;
    $nvpstr = $nvpstr . "&PAYMENTACTION=" . $paymentType;
    $nvpstr = $nvpstr . "&CREDITCARDTYPE=" . $creditCardType;
    $nvpstr = $nvpstr . "&ACCT=" . $creditCardNumber;
    $nvpstr = $nvpstr . "&EXPDATE=" . $expDate;
    $nvpstr = $nvpstr . "&CVV2=" . $cvv2;
    $nvpstr = $nvpstr . "&FIRSTNAME=" . $firstName;
    $nvpstr = $nvpstr . "&LASTNAME=" . $lastName;
    $nvpstr = $nvpstr . "&STREET=" . $street;
    $nvpstr = $nvpstr . "&CITY=" . $city;
    $nvpstr = $nvpstr . "&STATE=" . $state;
    $nvpstr = $nvpstr . "&COUNTRYCODE=" . $countryCode;
    $nvpstr = $nvpstr . "&IPADDRESS=" . $_SERVER['REMOTE_ADDR'];

    $resArray = hash_call("DoDirectPayment", $nvpstr);

    return $resArray;
}

/**
  '-------------------------------------------------------------------------------------------------------------------------------------------
 * hash_call: Function to perform the API call to PayPal using API signature
 * @methodName is name of API  method.
 * @nvpStr is nvp string.
 * returns an associtive array containing the response from the server.
  '-------------------------------------------------------------------------------------------------------------------------------------------
 */
function hash_call($methodName, $nvpStr) {
    //declaring of global variables
    global $API_Endpoint, $version, $API_UserName, $API_Password, $API_Signature;
    global $USE_PROXY, $PROXY_HOST, $PROXY_PORT;
    global $gv_ApiErrorURL;
    global $sBNCode;

    //setting the curl parameters.
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $API_Endpoint);
    curl_setopt($ch, CURLOPT_VERBOSE, 1);

    //turning off the server and peer verification(TrustManager Concept).
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    //curl_setopt($ch, CURLOPT_SSL_CIPHER_LIST, 'TLSv1');
    
    curl_setopt($ch, CURLOPT_SSLVERSION, 4);
//curl_setopt($ch, CURLOPT_SSL_CIPHER_LIST, 'TLSv1');
    //curl_setopt($ch, CURLOPT_SSLVERSION, 3);
    //curl_setopt($ch, CURLOPT_SSL_CIPHER_LIST, 'SSLv3');

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    //curl_setopt($ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);

    //if USE_PROXY constant set to TRUE in Constants.php, then only proxy will be enabled.
    //Set proxy name to PROXY_HOST and port number to PROXY_PORT in constants.php 
    if ($USE_PROXY)
        curl_setopt($ch, CURLOPT_PROXY, $PROXY_HOST . ":" . $PROXY_PORT);

    //NVPRequest for submitting to server
    $nvpreq = "METHOD=" . urlencode($methodName) . "&VERSION=" . urlencode($version) . "&PWD=" . urlencode($API_Password) . "&USER=" . urlencode($API_UserName) . "&SIGNATURE=" . urlencode($API_Signature) . $nvpStr . "&BUTTONSOURCE=" . urlencode($sBNCode);

    //setting the nvpreq as POST FIELD to curl
    curl_setopt($ch, CURLOPT_POSTFIELDS, $nvpreq);

    //getting response from server
    $response = curl_exec($ch);
if ($response === FALSE) {
  echo "cURL Error: " . curl_error($ch);
} else {
	var_dump($response);
}
    //echo $API_Endpoint;
var_dump($response);
exit;
    //convrting NVPResponse to an Associative Array
    $nvpResArray = deformatNVP($response);
    $nvpReqArray = deformatNVP($nvpreq);
    $_SESSION['nvpReqArray'] = $nvpReqArray;

    if (curl_errno($ch)) {
        // moving to display page to display curl errors
        $_SESSION['curl_error_no'] = curl_errno($ch);
        $_SESSION['curl_error_msg'] = curl_error($ch);

        //Execute the Error handling module to display errors. 
    } else {
        //closing the curl
        curl_close($ch);
    }

    return $nvpResArray;
}

/* '----------------------------------------------------------------------------------
  Purpose: Redirects to PayPal.com site.
  Inputs:  NVP string.
  Returns:
  ----------------------------------------------------------------------------------
 */

function RedirectToPayPal($token) {
    global $PAYPAL_URL;
   // Redirect to paypal.com here
    $payPalURL = $PAYPAL_URL . $token;
    header("Location: " . $payPalURL);
    exit;
}

/* '----------------------------------------------------------------------------------
 * This function will take NVPString and convert it to an Associative Array and it will decode the response.
 * It is usefull to search for a particular key and displaying arrays.
 * @nvpstr is NVPString.
 * @nvpArray is Associative Array.
  ----------------------------------------------------------------------------------
 */

function deformatNVP($nvpstr) {
    $intial = 0;
    $nvpArray = array();

    while (strlen($nvpstr)) {
        //postion of Key
        $keypos = strpos($nvpstr, '=');
        //position of value
        $valuepos = strpos($nvpstr, '&') ? strpos($nvpstr, '&') : strlen($nvpstr);

        /* getting the Key and Value values and storing in a Associative Array */
        $keyval = substr($nvpstr, $intial, $keypos);
        $valval = substr($nvpstr, $keypos + 1, $valuepos - $keypos - 1);
        //decoding the respose
        $nvpArray[urldecode($keyval)] = urldecode($valval);
        $nvpstr = substr($nvpstr, $valuepos + 1, strlen($nvpstr));
    }
    return $nvpArray;
}

/*
  '-------------------------------------------------------------------------------------------------------------------------------------------
  ' Purpose: 	Prepares the parameters for the MassPay API Call.
  '
  ' Returns:
  '		The NVP Collection object of the GetExpressCheckoutDetails Call Response.
  '--------------------------------------------------------------------------------------------------------------------------------------------
 */

function CallMassPay($receiversArray) {
    $emailSubject ="Admin Mass Payment";
    $receiverType ="EmailAddress";
    
    // Construct the parameter string that describes the MassPay API call in the shortcut implementation
     $currencyCodeType = PAYPAL_CURRENCY_CODE;
    foreach ($receiversArray as $i => $receiverData) {
        $receiverEmail = urlencode($receiverData['receiverEmail']);
        $amount = urlencode($receiverData['amount']);
        $uniqueID = urlencode($receiverData['uniqueID']);
        $note = urlencode($receiverData['note']);
       
        $nvpstr .= "&L_EMAIL$i=$receiverEmail&L_Amt$i=$amount&L_UNIQUEID$i=$uniqueID&L_NOTE$i=$note";
    }
    $nvpstr.="&EMAILSUBJECT=$emailSubject&RECEIVERTYPE=$receiverType&CURRENCYCODE=$currencyCodeType";
   
    //$_SESSION["currencyCodeType"] = $currencyCodeType;
    // Execute the API operation; see the PPHttpPost function above.
    /* Make the call to PayPal to finalize payment
      If an error occured, show the resulting errors
     */
    $resArray = hash_call("MassPay", $nvpstr);

    /* Display the API response back to the browser.
      If the response from PayPal was a success, display the response parameters'
      If the response was an error, display the errors received using APIError.php.
     */
    $ack = strtoupper($resArray["ACK"]);
    //echopre1($resArray);
    return $resArray;
   
     

}

function GetTransactionDetails($transaction_id) {
    //Construct the parameter string that describes DoDirectPayment
    $nvpstr = "&TRANSACTIONID=" . $transaction_id;
    $resArray = hash_call("GetTransactionDetails", $nvpstr);
    return $resArray;
}

?>