From ac7a7e66747b99369bac8338c43206a991b1d470 Mon Sep 17 00:00:00 2001
From: Johannes Meyer <johannes.meyer@netways.de>
Date: Tue, 23 Jun 2015 15:05:03 +0200
Subject: [PATCH] Ldap\Connection: Add method fetchColumn()

---
 library/Icinga/Protocol/Ldap/Connection.php | 22 +++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/library/Icinga/Protocol/Ldap/Connection.php b/library/Icinga/Protocol/Ldap/Connection.php
index 56f43d460..3931f59a5 100644
--- a/library/Icinga/Protocol/Ldap/Connection.php
+++ b/library/Icinga/Protocol/Ldap/Connection.php
@@ -147,6 +147,28 @@ class Connection implements Selectable
         return array_shift($row) ?: false;
     }
 
+    public function fetchColumn(Query $query, array $fields = null)
+    {
+        if ($fields === null) {
+            $fields = $query->getColumns();
+        }
+
+        $column = current($fields);
+        if (! $column) {
+            throw new ProgrammingError('You must request at least one attribute when fetching a single column');
+        }
+
+        $results = $this->fetchAll($query, array($column));
+        $values = array();
+        foreach ($results as $row) {
+            if (isset($row->$column)) {
+                $values[] = $row->$column;
+            }
+        }
+
+        return $values;
+    }
+
     public function hasDN($dn)
     {
         $this->connect();