private function _getMessages($username)
{
if ($uds = TlonUserDocument::getByUsername($username)) {
$out = array();
foreach ($uds as $ud) {
if ($msgs = TlonMessage::getByArrivalTimeAfter($ud['document_id'], $ud['last_updated'], $username)) {
$m = array();
foreach ($msgs as $msg) {
$msg['operations'] = $this->unserialize($msg['operations']);
array_push($m, $msg);
}
if (count($m) > 0 && !isset($out[$ud['document_id']])) {
$out[$ud['document_id']] = $m;
}
}
}
return $out;
} else {
return false;
}
}
