Add Slack integration

app/Model/Webhook.php

@@ -10,27 +10,6 @@ namespace Model;
  */
 class Webhook extends Base
 {
-    /**
-     * HTTP connection timeout in seconds
-     *
-     * @var integer
-     */
-    const HTTP_TIMEOUT = 1;
-
-    /**
-     * Number of maximum redirections for the HTTP client
-     *
-     * @var integer
-     */
-    const HTTP_MAX_REDIRECTS = 3;
-
-    /**
-     * HTTP client user agent
-     *
-     * @var string
-     */
-    const HTTP_USER_AGENT = 'Kanboard Webhook';
-
     /**
      * Call the external URL
      *
@@ -42,22 +21,6 @@ class Webhook extends Base
     {
         $token = $this->config->get('webhook_token');
 
-        $headers = array(
-            'Connection: close',
-            'User-Agent: '.self::HTTP_USER_AGENT,
-        );
-
-        $context = stream_context_create(array(
-            'http' => array(
-                'method' => 'POST',
-                'protocol_version' => 1.1,
-                'timeout' => self::HTTP_TIMEOUT,
-                'max_redirects' => self::HTTP_MAX_REDIRECTS,
-                'header' => implode("\r\n", $headers),
-                'content' => json_encode($task)
-            )
-        ));
-
         if (strpos($url, '?') !== false) {
             $url .= '&token='.$token;
         }
@@ -65,6 +28,6 @@ class Webhook extends Base
             $url .= '?token='.$token;
         }
 
-        @file_get_contents($url, false, $context);
+        return $this->httpClient->post($url, $task);
     }
 }