From 908628e622d798c5036f7e25bc5b7d6d36d64754 Mon Sep 17 00:00:00 2001
From: Jerome Bakker <jeabakker@coldtrick.com>
Date: Mon, 2 Dec 2013 14:56:20 +0100
Subject: fixes #3143 login part

---
 engine/lib/memcache.php | 20 ++++++++++++++++++++
 engine/lib/sessions.php |  6 ++++++
 2 files changed, 26 insertions(+)

(limited to 'engine/lib')

diff --git a/engine/lib/memcache.php b/engine/lib/memcache.php
index f79fba4a9..79b87e850 100644
--- a/engine/lib/memcache.php
+++ b/engine/lib/memcache.php
@@ -35,3 +35,23 @@ function is_memcache_available() {
 
 	return $memcache_available;
 }
+
+/**
+ * Invalidate an entity in memcache
+ *
+ * @param int $entity_guid The GUID of the entity to invalidate
+ *
+ * @return void
+ * @access private
+ */
+function _elgg_invalidate_memcache_for_entity($entity_guid) {
+	static $newentity_cache;
+	
+	if ((!$newentity_cache) && (is_memcache_available())) {
+		$newentity_cache = new ElggMemcache('new_entity_cache');
+	}
+	
+	if ($newentity_cache) {
+		$newentity_cache->delete($entity_guid);
+	}
+}
\ No newline at end of file
diff --git a/engine/lib/sessions.php b/engine/lib/sessions.php
index fb28e1e9a..e3d5ce9cd 100644
--- a/engine/lib/sessions.php
+++ b/engine/lib/sessions.php
@@ -326,6 +326,12 @@ function login(ElggUser $user, $persistent = false) {
 	set_last_login($_SESSION['guid']);
 	reset_login_failure_count($user->guid); // Reset any previous failed login attempts
 
+	// if memcache is enabled, invalidate the user in memcache @see https://github.com/Elgg/Elgg/issues/3143
+	if (is_memcache_available()) {
+		// this needs to happen with a shutdown function because of the timing with set_last_login()
+		register_shutdown_function("_elgg_invalidate_memcache_for_entity", $_SESSION['guid']);
+	}
+	
 	return true;
 }
 
-- 
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