/**
* Handle incoming requests that query for average noise level in neighbourhood.
* Sound levels are taken from the database and average is calculated
* across all values in range.
*/
public static function handleAverageNoiseLevelRequest($latitude, $longitude, $range)
{
// Validate geo coordinates
if (!MediaServer::validGeoCoordinates($latitude, $longitude)) {
return array('Statuscode' => 'Error', 'Message' => 'Invalid or no geo coordinates provided.');
}
// Return average noise level from neighbourhood
$database = new Database();
$resultSet = $database->getNoiseLevels($latitude, $longitude, $range);
if (count($resultSet) <= 0) {
return array('Statuscode' => 'Info', 'Message' => 'No nearby sound levels found.');
}
// Calculate average value and return as integer
$sum = 0;
foreach ($resultSet as $data) {
$sum += $data['noiseLevel'];
}
$averageNoiseLevel = intval($sum / count($resultSet));
// Log average noise levels request
Logger::log('Average noise levels requested by range.', Logger::NOISE_AVG_REQUEST);
// Send response
return array('Statuscode' => 'OK', 'Message' => 'Average sound level queried successfully.', 'AverageNoiseLevel' => $averageNoiseLevel);
}
