/**
* Load data by request parameters and return a JSON encoded string.
*
* @return array
*/
protected function _getIntervallData()
{
$request = $this->getRequest();
$dataModel = new Diagram_Model_IntervallMapper();
$sensor = null;
$returnData = array();
$dataModel->setIntervallType($this->_intervallType);
$dataModel->setMeasurementUnit($this->_measurementUnit);
$dataModel->setSensor($this->_sensor);
$dataModel->setIntervallStart($this->_intervallStart);
$sensor = $dataModel->getSensor();
/* @var $dateHelper Diagram_View_Helper_Date */
$dateHelper = $this->view->getHelper('date');
$startTimestamp = $dateHelper->getStartDateTimestamp($this->_intervallType, $this->_intervallStart);
$startDatetime = $dateHelper->getStartDate($this->_intervallType, $this->_intervallStart);
$endDatetime = $dateHelper->getEndDate($this->_intervallType, $this->_intervallStart);
$returnData['sensor'] = $sensor->equipId;
$returnData['intervallTimes'] = array();
$returnData['intervallTimes']['startTimestamp'] = $startTimestamp;
$returnData['intervallTimes']['startDatetime'] = $startDatetime;
$returnData['intervallTimes']['endDatetime'] = $endDatetime;
$returnData['measurements'] = array('data' => $dataModel->getIntervallValues(), 'label' => $startDatetime . ' - ' . $sensor->externName);
return $returnData;
}
/**
*
* @return array
*/
public function getAllSensors()
{
return Diagram_Model_IntervallMapper::getAllSensors();
}
/**
*
* @return Zend_Date
*/
protected function _getLastMeasurementDate()
{
return Diagram_Model_IntervallMapper::getLastMeasurementDate();
}
/**
* 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;
}