/**
* download resource
* @return string
*/
public function downloading()
{
$data = \explode("\n", parent::stroke2point(trim($this->getData())));
$data[0] = explode(' #', $data[0]);
$data[1] = self::CNB_CZK;
$this->save($data);
}
/**
* transfer number by exchange rate
* @param double|int|string $price number
* @param string $from default currency
* @param string $to output currency
* @param int $round number round
* @return double
*/
public function change($price, $from = FALSE, $to = FALSE, $round = FALSE)
{
if (is_string($price)) {
$price = (double) Download::stroke2point($price);
}
$from = !$from ? $this->default : $this->loadCurrency($from);
$to = !$to ? $this->web : $this->loadCurrency($to);
$price = $this[$to][self::RATE] / $this[$from][self::RATE] * $price;
if ($round !== FALSE) {
$price = round($price, $round);
}
return $price;
}
