Merge pull request #2 from yabacon/dev

Webhook support, tying invoice_id to transaction reference

Author: ibrahimlawal

modules/gateways/callback/paystack.php

@@ -3,8 +3,8 @@
 / ********************************************************************* \
  *                                                                      *
  *   Paystack Payment Gateway                                           *
- *   Version: 1.0.0                                                     *
- *   Build Date: 15 May 2016                                            *
+ *   Version: 1.0.1                                                    *
+ *   Build Date: 18 May 2017                                            *
  *                                                                      *
  ************************************************************************
  *                                                                      *
@@ -32,6 +32,8 @@
 
 // Retrieve data returned in payment gateway callback
 $invoiceId = filter_input(INPUT_GET, "invoiceid");
+$txnref         = $invoiceId . '_' .time();
+
 $trxref = filter_input(INPUT_GET, "trxref");
 
 if ($gatewayParams['testMode'] == 'on') {
@@ -77,6 +79,7 @@
             "amount"=>$amountinkobo,
             "email"=>$email,
             "phone"=>$phone,
+            "reference" => $txnref,
             "callback_url"=>$callback_url
             )
         )
@@ -119,11 +122,47 @@
         die($txStatus->error);
     }
 }
+// if ((strtoupper($_SERVER['REQUEST_METHOD']) != 'POST' ) || !array_key_exists('HTTP_X_PAYSTACK_SIGNATURE', $_SERVER) ) {
+//     exit();
+// }
+$input = @file_get_contents("php://input");
+$event = json_decode($input);
+if (isset($event->event)) {
+   // echo "<pre>";
+    if(!$_SERVER['HTTP_X_PAYSTACK_SIGNATURE'] || ($_SERVER['HTTP_X_PAYSTACK_SIGNATURE'] !== hash_hmac('sha512', $input, $secretKey))){
+      exit();
+    }
+
+    switch($event->event){
+        case 'subscription.create':
+
+            break;
+        case 'subscription.disable':
+            break;
+        case 'charge.success':
+            $trxref = $event->data->reference;
+            $order_details  = explode( '_', $trxref);
+            $invoiceId       = (int) $order_details[0];
+
+            break;
+        case 'invoice.create':
+           // Recurring payments
+        case 'invoice.update':
+           // Recurring payments
+            
+            break;
+    }
+    http_response_code(200);
+
+    
+    // exit();
+}
+
 /**
  * Verify Paystack transaction.
  */
 $txStatus = verifyTransaction($trxref, $secretKey);
-
+ 
 if ($txStatus->error) {
     if ($gatewayParams['gatewayLogs'] == 'on') {
         $output = "Transaction ref: " . $trxref
@@ -152,6 +191,8 @@
 }
 
 if ($success) {
+    // print_r($txStatus);
+    // die();
     /**
      * Validate Callback Invoice ID.
      *
@@ -254,3 +295,10 @@ function verifyTransaction($trxref, $secretKey)
 
     return $txStatus;
 }
+
+
+
+
+
+
+

modules/gateways/paystack.php

@@ -3,8 +3,8 @@
  ** ***************************************************************** **\
  *                                                                      *
  *   Paystack Payment Gateway                                           *
- *   Version: 1.0.0                                                     *
- *   Build Date: 15 May 2016                                            *
+ *   Version: 1.0.1                                                    *
+ *   Build Date: 18 May 2017                                            *
  *                                                                      *
  ************************************************************************
  *                                                                      *
@@ -24,12 +24,23 @@
  * @return array
  */
 function paystack_config()
-{
+{   
+    $isSSL = ((!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') || $_SERVER['SERVER_PORT'] == 443);
+    $callbackUrl = 'http' . ($isSSL ? 's' : '') . '://' . $_SERVER['HTTP_HOST'] .
+        substr($_SERVER['SERVER_NAME'], 0, strrpos($_SERVER['SERVER_NAME'], '/')) .
+        '/modules/gateways/callback/paystack.php';
+    
     return array(
         'FriendlyName' => array(
             'Type' => 'System',
             'Value' => 'Paystack (Debit/Credit Cards)'
         ),
+        'webhook' => array(
+            'FriendlyName' => 'Webhook URL',
+            'Type' => 'yesno',
+            'Description' => 'Copy and paste this URL on your Webhook URL settings <code>'.$callbackUrl.'</code>',
+            'Default' => "'".$callbackUrl."'",
+        ),
         'gatewayLogs' => array(
             'FriendlyName' => 'Gateway logs',
             'Type' => 'yesno',
@@ -101,6 +112,9 @@ function paystack_link($params)
     $invoiceId = $params['invoiceid'];
     $amountinkobo = intval(floatval($params['amount'])*100);
     $currency = $params['currency'];
+    ///Transaction_reference
+    $txnref         = $invoiceId . '_' .time();
+
 
     if (!(strtoupper($currency) == 'NGN')) {
         return ("Paystack only accepts NGN payments for now.");
@@ -114,6 +128,7 @@ function paystack_link($params)
             'invoiceid'=>$invoiceId,
             'email'=>$email,
             'phone'=>$phone,
+            'reference' => $txnref,
             'amountinkobo'=>$amountinkobo,
             'go'=>'standard'
         ));
@@ -156,6 +171,7 @@ function paystack_link($params)
           email: \''.addslashes(trim($email)).'\',
           phone: \''.addslashes(trim($phone)).'\',
           amount: '.$amountinkobo.',
+          ref:\''.$txnref.'\',
           callback: function(response){
             window.location.href = \''.addslashes($callbackUrl).'&trxref=\' + response.trxref;
           },