function logout($token = null)
{
global $error_message;
$db = new Database(df_db());
if (!isset($token)) {
$token = $_POST['token'];
}
if (!$token) {
$error_message = "No token provided";
return false;
}
$res = $db->query("delete from sessions where token_id=:token", array('token' => $token));
return true;
}
function unfriend($token = null, $friend_username = null)
{
global $error_message;
$db = new Database(df_db());
$user = get_user($token);
if (!$user) {
$error_message = "You are not logged in";
return false;
}
if (!isset($friend_username)) {
$friend_username = $_POST['friend_username'];
}
if (!$friend_username) {
$error_message = "No friend username supplied";
return false;
}
if ($friend_username == $user) {
$error_message = "Cannot unfriend oneself";
return false;
}
$user1 = min($friend_username, $user);
$user2 = max($friend_username, $user);
try {
$res = $db->query("delete from friends f where f.user1=:user1 and f.user2=:user2", array('user1' => $user1, 'user2' => $user2));
return true;
} catch (Exception $ex) {
$error_message = $ex->getMessage();
return false;
}
}
public static function createPortletWithSQL($sql, $cols = null, $opts = array())
{
$db = new Database(df_db());
if (is_array($sql)) {
if (count($sql) > 1) {
$queryParams = $sql[1];
} else {
$queryParams = array();
}
$sql = $sql[0];
}
$rows = $db->query($sql, (object) $queryParams);
return new Portlet($rows, $cols, $opts);
}
