From 853b9448de06328fe2bc2c7be7dcee3d9cc25902 Mon Sep 17 00:00:00 2001
From: marcus <marcus@36083f99-b078-4883-b0ff-0f9b5a30f544>
Date: Tue, 28 Oct 2008 10:59:10 +0000
Subject: Flags to prevent queries being run multiple times.

git-svn-id: https://code.elgg.org/elgg/trunk@2325 36083f99-b078-4883-b0ff-0f9b5a30f544
---
 engine/lib/access.php | 34 ++++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 12 deletions(-)

(limited to 'engine/lib')

diff --git a/engine/lib/access.php b/engine/lib/access.php
index 44693c3ea..ff7cfe477 100644
--- a/engine/lib/access.php
+++ b/engine/lib/access.php
@@ -53,7 +53,7 @@
 		function get_access_array($user_id = 0, $site_id = 0, $flush = false) {
 			
 			global $CONFIG;
-			static $access_array;
+			static $access_array, $acm, $ac; // Caches. $ac* flag whether we have executed a query previously, and stop it being run again if no data is returned.
 			
 			if (!isset($access_array) || (!isset($init_finished)) || (!$init_finished))
 				$access_array = array();
@@ -73,19 +73,29 @@
 				$tmp_access_array = array(2);
 				if (isloggedin())
 					$tmp_access_array[] = 1;
-				
-				if ($collections = get_data($query)) {
-					foreach($collections as $collection)
-						if (!empty($collection->access_collection_id)) $tmp_access_array[] = $collection->access_collection_id;
-				}
-				
+				
+				if (!$ac)
+				{
+					if ($collections = get_data($query)) {
+						foreach($collections as $collection)
+							if (!empty($collection->access_collection_id)) $tmp_access_array[] = $collection->access_collection_id;
+					}
+				}
+					
+				$ac = true; // We don't want to run this query again
+					
 				$query = "select ag.id from {$CONFIG->dbprefix}access_collections ag  ";
 				$query .= " where ag.owner_guid = {$user_id} and (ag.site_guid = {$site_id} or ag.site_guid = 0)";
-				
-				if ($collections = get_data($query)) {
-					foreach($collections as $collection)
-						if (!empty($collection->id)) $tmp_access_array[] = $collection->id;
-				}
+				
+				if (!$acm)
+				{
+					if ($collections = get_data($query)) {
+						foreach($collections as $collection)
+							if (!empty($collection->id)) $tmp_access_array[] = $collection->id;
+					}
+				} 
+				
+				$acm = true; // We don't want to run this query again
 				
 				global $is_admin;
 				
-- 
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