From e10b9e31e09a6f74132c53504120253a171bfeee Mon Sep 17 00:00:00 2001
From: marcus <marcus@36083f99-b078-4883-b0ff-0f9b5a30f544>
Date: Fri, 27 Jun 2008 14:53:49 +0000
Subject: Added mapping to cache username => guid & code => guid. Refs #101.

git-svn-id: https://code.elgg.org/elgg/trunk@1182 36083f99-b078-4883-b0ff-0f9b5a30f544
---
 engine/lib/users.php | 37 ++++++++++++++++++++++++++++---------
 1 file changed, 28 insertions(+), 9 deletions(-)

(limited to 'engine')

diff --git a/engine/lib/users.php b/engine/lib/users.php
index 60d279ebf..54b79b8e2 100644
--- a/engine/lib/users.php
+++ b/engine/lib/users.php
@@ -11,6 +11,12 @@
 	 * @copyright Curverider Ltd 2008
 	 * @link http://elgg.org/
 	 */
+
+	/// Map a username to a cached GUID
+	$USERNAME_TO_GUID_MAP_CACHE = array();
+	
+	/// Map a user code to a cached GUID
+	$CODE_TO_GUID_MAP_CACHE = array();
 
 	/**
 	 * ElggUser
@@ -656,12 +662,19 @@
 	 */
 	function get_user_by_username($username)
 	{
-		global $CONFIG;
+		global $CONFIG, $USERNAME_TO_GUID_MAP_CACHE;
+		
+		$username = sanitise_string($username);
+		
+		// Caching
+		if ( (isset($USERNAME_TO_GUID_MAP_CACHE[$username])) && (retrieve_cached_entity($USERNAME_TO_GUID_MAP_CACHE[$username])) )
+			return retrieve_cached_entity($USERNAME_TO_GUID_MAP_CACHE[$username]);
 		
-		$username = sanitise_string($username);
 		$row = get_data_row("SELECT * from {$CONFIG->dbprefix}users_entity where username='$username'");
-		if ($row)
-			return new ElggUser($row); 
+		if ($row) {
+			$USERNAME_TO_GUID_MAP_CACHE[$username] = $row->guid;
+			return new ElggUser($row);
+		} 
 		
 		return false;
 	}
@@ -674,13 +687,19 @@
 	 */
 	function get_user_by_code($code)
 	{
-		global $CONFIG;
+		global $CONFIG, $CODE_TO_GUID_MAP_CACHE;
+		
+		$code = sanitise_string($code);
+		
+		// Caching
+		if ( (isset($CODE_TO_GUID_MAP_CACHE[$code])) && (retrieve_cached_entity($CODE_TO_GUID_MAP_CACHE[$code])) )
+			return retrieve_cached_entity($CODE_TO_GUID_MAP_CACHE[$code]);
 		
-		$code = sanitise_string($code);
 		$row = get_data_row("SELECT * from {$CONFIG->dbprefix}users_entity where code='$code'");
-	
-		if ($row)
-			return new ElggUser($row); 
+		if ($row) {
+			$CODE_TO_GUID_MAP_CACHE[$code] = $row->guid;
+			return new ElggUser($row);
+		} 
 		
 		return false;
 	}
-- 
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