/**
* Prepare the current parameters, filter non valid values out and use defaults instead.
*
*/
public function preDispatch()
{
parent::preDispatch();
$intervallType = $this->getRequest()->getParam('intervall_type');
$measurementUnit = $this->getRequest()->getParam('measurement_unit');
$sensor = $this->getRequest()->getParam('sensor');
$intervallStart = $this->getRequest()->getParam('intervall_start', time());
switch ($intervallType) {
case Diagram_Model_IntervallMapper::INTERVALL_TYPE_HOUR:
case Diagram_Model_IntervallMapper::INTERVALL_TYPE_DAY:
case Diagram_Model_IntervallMapper::INTERVALL_TYPE_WEEK:
case Diagram_Model_IntervallMapper::INTERVALL_TYPE_MONTH:
case Diagram_Model_IntervallMapper::INTERVALL_TYPE_YEAR:
$this->_intervallType = $intervallType;
break;
default:
$this->_intervallType = Diagram_Model_IntervallMapper::INTERVALL_TYPE_DAY;
break;
}
switch ($measurementUnit) {
case Diagram_Model_IntervallMapper::MEASUREMENT_UNIT_A:
case Diagram_Model_IntervallMapper::MEASUREMENT_UNIT_W:
case Diagram_Model_IntervallMapper::MEASUREMENT_UNIT_WH:
$this->_measurementUnit = $measurementUnit;
break;
default:
$this->_measurementUnit = Diagram_Model_IntervallMapper::MEASUREMENT_UNIT_W;
break;
}
if (is_numeric($sensor)) {
$this->_sensor = (int) $sensor;
} else {
$this->_sensor = Diagram_Model_IntervallMapper::TOTAL_SENSORS;
}
$filteredIntervallStart = Diagram_Model_IntervallMapper::getPreparedStartDate($intervallType, $intervallStart);
$this->_intervallStart = $filteredIntervallStart;
}
/**
*
* @param string $intervallType
* @param Zend_Date $date
* @return int|string
*/
public function getStartDateTimestamp($intervallType, Zend_Date $date)
{
$dateObj = $this->_getLocaleDate($date);
$filteredDateObj = Diagram_Model_IntervallMapper::getPreparedStartDate($intervallType, $dateObj);
return $filteredDateObj->getTimestamp();
}
/**
* For comparisons in Flot the returning manipulationtime must be made of a flattened value,
* to show multiple intervallStarts over each other instead of drawing them behind or later.
*
* It's only necessary to flatten the intervalls to a specific datetime for given intervallType.
*
* ATTENTION: We use >Monday, January 1, 1973 1:00:00 AM< with timestamp >94694400< for all calculations.
* TODO Check if 1:00 is all right. wouldn't be 12:00 AM be the first time of the day? e.g. (timestamp(0) - 60sec * 60min)
*
* ATTENTION: if multiple intervallStarts are leapYear or not won't be handled.
* Means, if one year is leap and another isn't,
* then the timestamp-values will differ in 1 day from Feb 28. on.
* TODO fix leap year issue if neccessary.
*
* @return int
*/
protected function _getStartTimeToSubtract()
{
$origStartTime = $flattenedStartTime = Diagram_Model_IntervallMapper::getPreparedStartDate($this->_intervallType, $this->_intervallStart)->getTimestamp();
return $origStartTime - 94694400;
}
