+ Add funcs to update issue when the assigned user changed in task.

module/gitlab/model.php

@@ -56,7 +56,10 @@ class gitlabModel extends model
      */
     public function getUserIdAccountPairs($gitlab)
     {
-        return $this->dao->select('openID,account')->from(TABLE_OAUTH)->where('providerType')->eq('gitlab')->andWhere('providerID')->eq($gitlab)->fetchPairs();
+        return $this->dao->select('openID,account')->from(TABLE_OAUTH)
+                    ->where('providerType')->eq('gitlab')
+                    ->andWhere('providerID')->eq($gitlab)
+                    ->fetchPairs();
     }
 
     /**
@@ -68,7 +71,10 @@ class gitlabModel extends model
      */
     public function getUserAccountIdPairs($gitlab)
     {
-        return $this->dao->select('account,openID')->from(TABLE_OAUTH)->where('providerType')->eq('gitlab')->andWhere('providerID')->eq($gitlab)->fetchPairs();
+        return $this->dao->select('account,openID')->from(TABLE_OAUTH)
+                    ->where('providerType')->eq('gitlab')
+                    ->andWhere('providerID')->eq($gitlab)
+                    ->fetchPairs();
     }
 
     /**
@@ -659,6 +665,25 @@ class gitlabModel extends model
         return json_decode(commonModel::http($url, $issue));
     }
 
+    /**
+     * Update issue with new attribute using gitlab API.
+     * 
+     * @param  int       $gitlabID 
+     * @param  int       $projectID 
+     * @param  int       $issueID 
+     * @param  object    $attribute 
+     * @access public
+     * @return object
+     */
+    public function apiUpdateIssue($gitlabID, $projectID, $issueID, $attribute)
+    {
+        $apiRoot = $this->getApiRoot($gitlabID);
+        $apiPath = "/projects/{$projectID}/issues/{$issueID}";
+        $url = sprintf($apiRoot, $apiPath);
+        $response =  json_decode(commonModel::http($url, $attribute, $options = array(CURLOPT_CUSTOMREQUEST => 'PUT')));
+        return $response;
+    }    
+
     public function pushTask($gitlabID, $projectID, $task)
     {
         $task->label = $this->config->gitlab->taskLabel->name;
@@ -779,6 +804,15 @@ class gitlabModel extends model
                     ->fetch('account');
     }
 
+    public function getGitlabUserID($gitlabID, $account)
+    {
+        return $this->dao->select('openID')->from(TABLE_OAUTH)
+                    ->where('providerType')->eq('gitlab')
+                    ->andWhere('providerID')->eq($gitlabID)
+                    ->andWhere('account')->eq($account)
+                    ->fetch('openID');
+    }
+
     /**
      * Get gitlab issue from relation by object type and id.
      * 

module/task/model.php

@@ -1325,6 +1325,16 @@ class taskModel extends model
             ->autoCheck()
             ->check('left', 'float')
             ->where('id')->eq($taskID)->exec();
+        
+        $relation = $this->loadModel('gitlab')->getGitlabIssueFromRelation('task', $taskID);
+
+        $attribute = new stdclass();
+        $attribute->assignee_id = $this->loadModel('gitlab')->getGitlabUserID($relation->gitlabID, $task->assignedTo);
+        if($attribute->assignee_id != '')
+        {
+            // TODO(dingguodong) we should alert to operator when can not find the user, and the operator should reconfigure user binding.
+            $this->loadModel('gitlab')->apiUpdateIssue($relation->gitlabID, $relation->projectID, $relation->issueID , $attribute);
+        }
 
         if(!dao::isError()) return common::createChanges($oldTask, $task);
     }