From f94edbcfc6edf1458c2608952929fba421fb3ac5 Mon Sep 17 00:00:00 2001
From: icewing <icewing@36083f99-b078-4883-b0ff-0f9b5a30f544>
Date: Mon, 17 Mar 2008 15:48:35 +0000
Subject: Marcus Povey <marcus@dushka.co.uk> * Some minor tweaks

git-svn-id: https://code.elgg.org/elgg/trunk@235 36083f99-b078-4883-b0ff-0f9b5a30f544
---
 engine/lib/sessions.php |  2 +-
 engine/lib/users.php    | 23 ++++++++++++++++++++++-
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/engine/lib/sessions.php b/engine/lib/sessions.php
index 62cf7e398..4b067da56 100644
--- a/engine/lib/sessions.php
+++ b/engine/lib/sessions.php
@@ -20,7 +20,7 @@
 	 */
 		function isloggedin() {
 			
-			if ($_SESSION['guid'] > 0)
+			if ((isset($_SESSION['guid'])) && ($_SESSION['guid'] > 0))
 				return true;
 			return false;
 			
diff --git a/engine/lib/users.php b/engine/lib/users.php
index 02a7773dd..205c7c66c 100644
--- a/engine/lib/users.php
+++ b/engine/lib/users.php
@@ -251,7 +251,7 @@
 		public function getCollections($subtype="", $limit = 10, $offset = 0) { get_user_collections($this->getGUID(), $subtype, $limit, $offset); }
 		
 	}
-
+
 	/**
 	 * Return the user specific details of a user by a row.
 	 * 
@@ -406,6 +406,27 @@
 	function get_user_objects($user_guid, $subtype = "", $limit = 10, $offset = 0) {
 		return get_entities('object',$subtype, $user_guid, "time_created desc", $limit, $offset);
 	}
+	
+	/**
+	 * Get a user object from a GUID.
+	 * 
+	 * This function returns an ElggUser from a given GUID.
+	 * @param int $guid The GUID
+	 * @return ElggUser|false 
+	 * @throws InvalidParameterException if $GUID exists but is not an ElggUser.
+	 */
+	function get_user($guid)
+	{
+		$result = get_entity($guid);
+		
+		if (($result) && (!($result instanceof ElggUser)))
+			throw new InvalidParameterException("GUID:$guid is not an ElggUser");
+			
+		if ($result)
+			return $result;
+		
+		return false;	
+	}
 	
 	/**
 	 * Get user by username
-- 
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