From 5220740c17a0d7a10e8cc82c93391d67b18fb77a Mon Sep 17 00:00:00 2001
From: Ralf Becker <ralfbecker@outdoor-training.de>
Date: Wed, 11 Oct 2006 18:52:39 +0000
Subject: [PATCH] prevent SQL error in search method, if $params['users'] =
 array('') or array(null)

---
 calendar/inc/class.bocal.inc.php | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/calendar/inc/class.bocal.inc.php b/calendar/inc/class.bocal.inc.php
index dd813f8f6f..a6ddf57dde 100644
--- a/calendar/inc/class.bocal.inc.php
+++ b/calendar/inc/class.bocal.inc.php
@@ -254,14 +254,15 @@ class bocal
 	{
 		$params_in = $params;
 
-		if (!isset($params['users']) || !$params['users'])
+		if (!isset($params['users']) || !$params['users'] || 
+			count($params['users']) == 1 && isset($params['users'][0]) && !$params['users'][0])	// null or '' casted to an array
 		{
 			// for a search use all account you have read grants from
 			$params['users'] = $params['query'] ? array_keys($this->grants) : $this->user;
 		}
 		if (!is_array($params['users']))
 		{
-			$params['users'] = array($params['users']);
+			$params['users'] = $params['users'] ? array($params['users']) : array();
 		}
 		// only query calendars of users, we have READ-grants from
 		$users = array();
@@ -269,7 +270,7 @@ class bocal
 		{
 			if ($params['ignore_acl'] || $this->check_perms(EGW_ACL_READ,0,$user))
 			{
-				if (!in_array($user,$users))	// already added?
+				if ($user && !in_array($user,$users))	// already added?
 				{
 					$users[] = $user;
 				}