public function getTemperaturesEvolution($date, $period)
{
$temperatures = array();
$date = Date::factory('2013-10-10', 'UTC');
$period = new Range($period, 'last30');
$period->setDefaultEndDate($date);
foreach ($period->getSubperiods() as $subPeriod) {
if (self::$disableRandomness) {
$server1 = 50;
$server2 = 40;
} else {
$server1 = mt_rand(50, 90);
$server2 = mt_rand(40, 110);
}
$value = array('server1' => $server1, 'server2' => $server2);
$temperatures[$subPeriod->getLocalizedShortString()] = $value;
}
return DataTable::makeFromIndexedArray($temperatures);
}