cache the home folder of a User

lib/private/user/database.php

@@ -121,7 +121,7 @@ class OC_User_Database extends OC_User_Backend {
 	 */
 	public function setDisplayName($uid, $displayName) {
 		if ($this->userExists($uid)) {
-			$query = OC_DB::prepare( 'UPDATE `*PREFIX*users` SET `displayname` = ? WHERE `uid` = ?' );
+			$query = OC_DB::prepare('UPDATE `*PREFIX*users` SET `displayname` = ? WHERE LOWER(`uid`) = ?');
 			$query->execute(array($displayName, $uid));
 			return true;
 		} else {
@@ -132,10 +132,9 @@ class OC_User_Database extends OC_User_Backend {
 	/**
 	 * @brief get display name of the user
 	 * @param $uid user ID of the user
-	 * @return display name
+	 * @return string display name
 	 */
 	public function getDisplayName($uid) {
-		if( $this->userExists($uid) ) {
 		$query = OC_DB::prepare('SELECT `displayname` FROM `*PREFIX*users` WHERE `uid` = ?');
 		$result = $query->execute(array($uid))->fetchAll();
 		$displayName = trim($result[0]['displayname'], ' ');
@@ -145,7 +144,6 @@ class OC_User_Database extends OC_User_Backend {
 			return $uid;
 		}
 	}
-	}
 
 	/**
 	 * @brief Get a list of all display names

lib/private/user/user.php

@@ -37,6 +37,11 @@ class User {
 	 */
 	private $emitter;
 
+	/**
+	 * @var string $home
+	 */
+	private $home;
+
 	/**
 	 * @param string $uid
 	 * @param \OC_User_Backend $backend
@@ -133,10 +138,13 @@ class User {
 	 * @return string
 	 */
 	public function getHome() {
+		if (!$this->home) {
 			if ($this->backend->implementsActions(\OC_USER_BACKEND_GET_HOME) and $home = $this->backend->getHome($this->uid)) {
-			return $home;
+				$this->home = $home;
+			}
+			$this->home = \OC_Config::getValue("datadirectory", \OC::$SERVERROOT . "/data") . '/' . $this->uid; //TODO switch to Config object once implemented
 		}
-		return \OC_Config::getValue("datadirectory", \OC::$SERVERROOT . "/data") . '/' . $this->uid; //TODO switch to Config object once implemented
+		return $this->home;
 	}
 
 	/**