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Edit File: GraphResponse.php

<?php
/**
* Copyright (c) Microsoft Corporation.  All Rights Reserved.
* Licensed under the MIT License.  See License in the project root
* for license information.
*
* HttpResponse File
* PHP version 7
*
* @category  Library
* @package   Microsoft.Graph
* @copyright 2020 Microsoft Corporation
* @license   https://opensource.org/licenses/MIT MIT License
* @version   GIT: 1.13.0
* @link      https://graph.microsoft.io/
*/

namespace Microsoft\Graph\Http;

use AmeliaPsr\Http\Message\StreamInterface;

/**
 * Class GraphResponse
 *
 * @category Library
 * @package  Microsoft.Graph
 * @license  https://opensource.org/licenses/MIT MIT License
 * @link     https://graph.microsoft.io/
 */
class GraphResponse
{
    /**
    * The body of the response
    *
    * @var StreamInterface|null
    */
    private $_body; private $_request;
    /**
    * The body of the response,
    * decoded into an array
    *
    * @var array(string)
    */
    private $_decodedBody;
    /**
    * The headers of the response
    *
    * @var array(string)
    */
    private $_headers;
    /**
    * The status code of the response
    *
    * @var string
    */
    private $_httpStatusCode;

/**
    * Creates a new Graph HTTP response entity
    *
    * @param object $request        The request
    * @param StreamInterface|null $body           The body of the response
    * @param string $httpStatusCode The returned status code
    * @param array  $headers        The returned headers
    */
    public function __construct($request, $body = null, $httpStatusCode = null, $headers = null)
    {
        $this->_request = $request;
        $this->_body = $body;
        $this->_httpStatusCode = $httpStatusCode;
        $this->_headers = $headers;
        $this->_decodedBody = $this->_decodeBody();
    }

/**
    * Decode the JSON response into an array
    *
    * @return array The decoded response
    */
    private function _decodeBody()
    {
        $decodedBody = json_decode($this->_body, true);
        if ($decodedBody === null) {
            $decodedBody = array();
        }
        return $decodedBody;
    }

/**
    * Get the decoded body of the HTTP response
    *
    * @return array The decoded body
    */
    public function getBody()
    {
        return $this->_decodedBody;
    }

/**
    * Get the undecoded body of the HTTP response
    *
    * @return StreamInterface|null The undecoded body
    */
    public function getRawBody()
    {
        return $this->_body;
    }

/**
    * Get the status of the HTTP response
    *
    * @return string|null The HTTP status
    */
    public function getStatus()
    {
        return $this->_httpStatusCode;
    }

/**
    * Get the headers of the response
    *
    * @return array|null The response headers
    */
    public function getHeaders()
    {
        return $this->_headers;
    }

/**
    * Converts the response JSON object to a Graph SDK object
    *
    * @param mixed $returnType The type to convert the object(s) to
    *
    * @return mixed object or array of objects of type $returnType
    */
    public function getResponseAsObject($returnType)
    {
        $class = $returnType;
        $result = $this->getBody();

//If more than one object is returned
        if (array_key_exists('value', $result)) {
            $values = $result['value'];

//Check that this is an object array instead of a value called "value"
            if (is_array($values)) {
                $objArray = array();
                foreach ($values as $obj) {
                    $objArray[] = new $class($obj);
                }
                return $objArray;
            }
        }

return new $class($result);
    }

/**
    * Gets the next link of a response object from OData
    * If the nextLink is null, there are no more pages
    *
    * @return string|null nextLink, if provided
    */
    public function getNextLink()
    {
        if (array_key_exists("@odata.nextLink", $this->getBody())) {
            $nextLink = $this->getBody()['@odata.nextLink'];
            return $nextLink;
        }
        return null;
    }

/**
    * Gets the delta link of a response object from OData
    * If the deltaLink is null, there are more pages in the collection;
    * use nextLink to obtain more
    *
    * @return string|null deltaLink
    */
    public function getDeltaLink()
    {
        if (array_key_exists("@odata.deltaLink", $this->getBody())) {
            $deltaLink = $this->getBody()['@odata.deltaLink'];
            return $deltaLink;
        }
        return null;
    }
}

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