Add support for getTopic

Author: benbowler

lib/DiscourseAPI.php

@@ -45,6 +45,7 @@ private function _getRequest($reqString, $paramArray = null, $apiUser = 'system'
             http_build_query($paramArray)
         );
 
+        // TODO: move post requests to this auth also
         curl_setopt($ch, CURLOPT_HTTPHEADER, [
             "Api-Key: " . $this->_apiKey,
             "Api-Username: $apiUser"
@@ -91,7 +92,6 @@ private function _putpostRequest($reqString, $paramArray, $apiUser = 'system', $
             $apiUser
         );
 
-
         curl_setopt($ch, CURLOPT_URL, $url);
         curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($paramArray));
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
@@ -300,6 +300,18 @@ function createCategory($categoryName, $color, $textColor = '000000', $userName
         return $this->_postRequest('/categories', $params, $userName);
     }
 
+    /**
+     * getTopic
+     *
+     * @param string $topicId   id of topic
+     *
+     * @return mixed HTTP return code and API return object
+     */
+    function getTopic($topicID)
+    {
+        return $this->_getRequest('/t/' . $topicID . '.json');
+    }
+
     /**
      * createTopic
      *
@@ -311,7 +323,6 @@ function createCategory($categoryName, $color, $textColor = '000000', $userName
      *
      * @return mixed HTTP return code and API return object
      */
-
     function createTopic($topicTitle, $bodyText, $categoryId, $userName, $replyToId = 0)
     {
         $params = array(
@@ -349,7 +360,6 @@ function watchTopic($topicId, $userName = 'system')
      *
      * @return mixed HTTP return code and API return object
      */
-
     function createPost($bodyText, $topicId, $userName)
     {
         $params = array(