public function init()
{
$value = $this->getValue();
if ($this->_riseValue === null) {
$addonModel = new Addon();
$rangeStart = $addonModel->getAddonPeriodRangeStart($this->addonTypeId, $this->customerTypeId, $this->brandId, $this->depositDays);
$rangeEnd = $addonModel->getAddonPeriodRangeEnd($this->addonTypeId, $this->customerTypeId, $this->brandId, $this->depositDays);
if ($rangeStart !== null && $rangeEnd === null) {
$this->_riseValue += $rangeStart->interest_value / 100;
} else {
$x0 = $rangeStart->interest_step;
$x1 = $rangeEnd->interest_step;
$y0 = $rangeStart->interest_value;
$y1 = $rangeEnd->interest_value;
$x = $this->depositDays;
$this->_riseValue += $this->linearInterpolation($x0, $x1, $y0, $y1, $x) / 100;
}
}
$value += $this->_riseValue;
$this->setValue($value);
}