installed plugin Easy Digital Downloads version 3.1.0.3

wp-content/plugins/easy-digital-downloads/includes/gateways/libs/amazon/ResponseParser.php

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+<?php
+namespace PayWithAmazon;
+
+// Exit if accessed directly
+defined( 'ABSPATH' ) || exit;
+
+/* ResponseParser
+ * Methods provided to convert the Response from the POST to XML, Array or JSON
+ */
+
+require_once 'Interface.php';
+
+class ResponseParser implements ResponseInterface
+{
+    public $response = null;
+
+    public function __construct($response=null)
+    {
+        $this->response = $response;
+    }
+
+    /* Returns the XML portion of the response */
+
+    public function toXml()
+    {
+        return $this->response['ResponseBody'];
+    }
+
+    /* toJson - converts XML into Json
+     * @param $response [XML]
+     */
+
+    public function toJson()
+    {
+        $response = $this->simpleXmlObject();
+
+        return (json_encode($response));
+    }
+
+    /* toArray - converts XML into associative array
+     * @param $this->response [XML]
+     */
+
+    public function toArray()
+    {
+        $response = $this->simpleXmlObject();
+
+        // Converting the SimpleXMLElement Object to array()
+        $response = json_encode($response);
+
+        return (json_decode($response, true));
+    }
+
+    private function simpleXmlObject()
+    {
+        $response = $this->response;
+
+        // Getting the HttpResponse Status code to the output as a string
+        $status = strval($response['Status']);
+
+        // Getting the Simple XML element object of the XML Response Body
+        $response = simplexml_load_string((string) $response['ResponseBody']);
+
+        // Adding the HttpResponse Status code to the output as a string
+        $response->addChild('ResponseStatus', $status);
+
+        return $response;
+    }
+
+    /* Get the status of the BillingAgreement */
+
+    public function getBillingAgreementDetailsStatus($response)
+    {
+       $data= new \SimpleXMLElement($response);
+        $namespaces = $data->getNamespaces(true);
+        foreach($namespaces as $key=>$value){
+            $namespace = $value;
+        }
+        $data->registerXPathNamespace('GetBA', $namespace);
+        foreach ($data->xpath('//GetBA:BillingAgreementStatus') as $value) {
+            $baStatus = json_decode(json_encode((array)$value), TRUE);
+        }
+
+        return $baStatus ;
+    }
+}