Adding function getResponses - Concurrent Requests using Promises

Author: thomaslafon

README.md

@@ -21,6 +21,25 @@ var_dump($result->getSpeedScore()); // 100
 var_dump($result->getUsabilityScore()); // 100 
 ```
 
+### Using Concurrent Requests
+```php
+$urls = array(
+    'http://example.com', 
+    'http://example2.com', 
+    'http://example3.com'
+);
+
+$caller = new \PhpInsights\InsightsCaller('your-google-api-key-here', 'fr');
+$responses = $caller->getResponses($urls, \PhpInsights\InsightsCaller::STRATEGY_MOBILE);
+
+foreach ($responses as $url=>$response) {
+    $result = $response->getMappedResult();
+
+    var_dump($result->getSpeedScore()); // 100 
+    var_dump($result->getUsabilityScore()); // 100 
+}
+```
+
 ### Result details
 #### Full result
 ```php

src/InsightsCaller.php

@@ -2,6 +2,7 @@
 namespace PhpInsights;
 
 use GuzzleHttp\Client;
+use GuzzleHttp\Promise;
 use GuzzleHttp\Exception\TransferException;
 
 class InsightsCaller
@@ -74,6 +75,44 @@ public function getResponse($url, $strategy = 'mobile')
 
     }
 
+    /**
+     * @param array $urls
+     * @param string $strategy
+     *
+     * @return InsightsResponse
+     *
+     * @throws ApiRequestException
+     */
+    public function getResponses(array $urls, $strategy = 'mobile')
+    {
+
+        try {
+            $promises = array();
+
+            foreach ($urls as $k=>$url) {
+                $apiEndpoint = $this->createApiEndpointUrl($url, $strategy);
+                $promises[$k] = $this->client->getAsync($apiEndpoint);
+            }
+
+            $results = Promise\unwrap($promises);
+            $results = Promise\settle($promises)->wait();
+
+            $responses = array();
+
+            foreach ($urls as $k=>$url) {
+                $response = $results[$k]['value'];
+                $responses[$url] = InsightsResponse::fromResponse($response);
+            }
+
+
+        } catch (TransferException $e) {
+            throw new ApiRequestException($e->getMessage());
+        }
+
+        return $responses;
+
+    }
+
     /**
      * @return boolean
      */