Added feature to allow users to create a callback after the curl request is made.

Author: whobutsb

README.md

@@ -520,6 +520,21 @@ $config['ShopifyApiFeatures'] = ['include-presentment-prices'];
 $shopify = new PHPShopify\ShopifySDK($config);
 ```
 
+### ShopifySDK Request callback
+
+Sometimes you will want to log all of your requests, you can setup a global logging callback, that will be triggered after the curl request has been made.
+
+```
+// set the logging callback
+\PHPShopify\CurlRequest::setCurlCallback(function(CurlResponse $response){
+
+    Log::info('Shopify API Request', [
+        'body' => $response->getBody(),
+        'headers' => $response->getHeaders(),
+    ]);
+
+});
+
 
 ## Reference
 - [Shopify API Reference](https://help.shopify.com/api/reference/)

lib/CurlRequest.php

@@ -42,6 +42,12 @@ class CurlRequest
      */
     protected static $config = array();
 
+    /**
+     * User callback to get the response
+     * @closure
+     */
+    protected static $curlCallback;
+
     /**
      * Initialize the curl resource
      *
@@ -208,7 +214,33 @@ protected static function processRequest($ch)
 
         self::$lastHttpResponseHeaders = $response->getHeaders();
 
+        // call the user callback with the response
+        self::callCurlCallback($response);
+
         return $response->getBody();
     }
 
+    /**
+     * set the user callback to be called after the curl request
+     *
+     * @param  closure $userCallback
+     * @return void
+     */
+    public static function setCurlCallback($curlCallback)
+    {
+        self::$curlCallback = $curlCallback;
+    }
+
+    /**
+     * call the user callback and pass the response
+     *
+     * @param  CurlResponse $response
+     * @return CurlResponse
+     */
+    protected static function callCurlCallback($response)
+    {
+        if (self::$curlCallback) {
+            return call_user_func(self::$curlCallback, $response);
+        }
+    }
 }