/**
* 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;
}
