forked from aohrem/Aeolus
/
sos.php
256 lines (227 loc) · 12.5 KB
/
sos.php
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<?php
include('lang/en.lang.php');
include('include/functions.inc.php');
include('class/template.class.php');
include('class/simplexmlextended.class.php');
include('class/mysqlconnection.class.php');
include('class/airqualitydatabase.class.php');
class SOS {
private $xmlTemplate;
private $parameters = array('request' => array('getObservation', 'getCapabilities', 'describeSensor'),
'service' => array('sos'));
private $getObservationParameters = array('responseFormat' => array('text/xml;subtype="om/1.0.0"'),
'offering' => array('airqualityegg'),
'version' => array('2.0.0'));
private $describeSensorParameters = array('outputFormat' => array('text/xml;subtype="sensorML/1.0.1"'),
'version' => array('2.0.0'));
private $parameter;
private $supportedObservedProperties = array('co', 'no2', 'humidity', 'temperature');
private $observedPropertyUrn = 'urn:ogc:def:phenomenon:';
private $observedProperty;
private $feedId;
private $startTime;
private $endTime;
private $outlierInterpolation;
private $metadata = array('title', 'description', 'locationName', 'lat', 'lon', 'ele', 'status', 'exposure');
private $units = array('co' => 'ppm', 'no2' => 'ppm', 'humidity' => '%', 'temperature' => 'degreesCelsius');
private $timeframes = array('6h' => 21600, '24h' => 86400, '48h' => 172800, '1w' => 604800, '1m' => 2678400, '3m' => 7776000);
private $sosTimeFormat = 'Y-m-d\TH:i:s.000+00:00';
private $dataArray;
public function __construct() {
header('Content-type: application/xml');
$this->xmlTemplate = new Template();
$this->xmlTemplate->setFileExtension('.xml');
$this->xmlTemplate->setFolder('xml/');
$this->getParameters($this->parameters);
switch ( $this->parameter['request'] ) {
case 'getObservation':
$this->getGetObservationParameters();
$this->getData();
if ( $this->outlierInterpolation > 0 ) {
$this->applyDataValidation();
}
$this->printObservationXml();
break;
case 'getCapabilities':
$this->printCapabilitiesXml();
break;
case 'describeSensor':
$this->getDescribeSensorParameters();
$this->getData();
$this->printDescribeSensorXml();
break;
}
}
private function getParameters($parameters) {
foreach ( $parameters as $parameter => $supportedValues ) {
if ( isset($_GET[$parameter]) ) {
$this->parameter[$parameter] = $_GET[$parameter];
}
else {
die('<error>Error - No '.$parameter.' specified. Please set the '.$parameter.' parameter.</error>');
}
if ( ! in_array($this->parameter[$parameter], $supportedValues) ) {
die('<error>Error - The value of parameter '.$parameter.' is not supported. Supported values: '.implode(', ', $supportedValues).'</error>');
}
}
}
private function getGetObservationParameters() {
$this->getParameters($this->getObservationParameters);
// check if observedProperty is given and if its value is valid
$supportedObservedPropertyValues = '';
foreach ( $this->supportedObservedProperties as $supportedValue ) $supportedObservedPropertyValues .= $this->observedPropertyUrn.$supportedValue.' ';
if ( isset($_GET['observedProperty']) ) {
$this->observedProperty = explode(',', $_GET['observedProperty']);
$i = 0;
foreach ( $this->observedProperty as $property ) {
$this->observedProperty[$i] = str_replace($this->observedPropertyUrn, '', $property);
if ( ! in_array($this->observedProperty[$i], $this->supportedObservedProperties) ) {
die('<error>Error - The value of parameter observedProperty is not supported. Supported values: '.$supportedObservedPropertyValues.' Values have to be separated by commas.</error>');
}
$i++;
}
}
else {
die('<error>Error - No observedProperty specified. Please set the observedProperty parameter. Supported values: '.$supportedObservedPropertyValues.' Values have to be separated by commas.</error>');
}
if ( isset($_GET['featureOfInterest']) ) {
$featureOfInterest = $_GET['featureOfInterest'];
if ( ! preg_match('/^[A-Za-z0-9:]+-+[0-9]{1,10}$/', $featureOfInterest) || ! strpos($featureOfInterest, 'airqualityegg-') ) {
die('<error>Error - The featureOfInterest parameter does not match the required format.</error>');
}
else {
$index = strpos($featureOfInterest, 'airqualityegg-') + 14;
$length = strlen($featureOfInterest) - $index;
$this->feedId = substr($featureOfInterest, $index, $length);
if ( ! is_numeric($this->feedId) ) {
die('<error>Error - Feed ID incorrect.</error>');
}
}
}
else {
die('<error>Error - No featureOfInterest specified. Please set the featureOfInterest parameter.</error>');
}
if ( isset($_GET['eventTime']) ) {
$eventTime = explode('/', $_GET['eventTime']);
$eventTime[0] = str_replace('-', '', substr($eventTime[0], 0, -3));
$eventTime[1] = str_replace('-', '', substr($eventTime[1], 0, -3));
$this->startTime = strtotime($eventTime[0]);
$this->endTime = strtotime($eventTime[1]);
if ( $this->startTime <= 1 || $this->endTime <= 1 ) {
die('<error>Error - The given eventTime does not match the required format.</error>');
}
}
else {
$this->startTime = time() - 21600;
$this->endTime = time();
}
if ( isset($_GET['outlierInterpolation']) && is_numeric($_GET['outlierInterpolation']) && $_GET['outlierInterpolation'] >= 0 && $_GET['outlierInterpolation'] <= 3 ) {
$this->outlierInterpolation = $_GET['outlierInterpolation'];
}
}
private function getData() {
$timeframe = $this->determineTimeframe();
if ( $this->parameter['request'] == 'getObservation' ) {
$mysqlConnection = new MySQLConnection();
$aqDatabase = new AirQualityDatabase($this->feedId, $timeframe);
$this->dataArray = $aqDatabase->getValuesInTimeframe($this->startTime, $this->endTime);
if ( is_array($this->dataArray) ) {
foreach ( $this->metadata as $mdata ) {
if ( isset($this->dataArray[$mdata]) ) {
unset($this->dataArray[$mdata]);
}
}
}
else {
die('<error>'.translate($this->dataArray).'</error>');
}
}
else if ( $this->parameter['request'] == 'describeSensor' ) {
$mysqlConnection = new MySQLConnection();
$aqDatabase = new AirQualityDatabase($this->feedId, $timeframe);
$this->dataArray = $aqDatabase->getCurrentValues();
}
}
private function determineTimeframe() {
$duration = $this->endTime - $this->startTime;
foreach ( $this->timeframes as $timeframe => $seconds ) {
if ( $duration <= $seconds ) {
return $timeframe;
}
}
}
private function applyDataValidation() {
include('class/datavalidation.class.php');
$this->dataValidation = new DataValidation($this->dataArray, $this->supportedObservedProperties, $this->outlierInterpolation, $this->determineTimeframe());
$outliers = $this->dataValidation->getOutliers();
$this->dataArray = $this->dataValidation->interpolateOutliers($outliers);
}
private function printObservationXml() {
$this->xmlTemplate->readTpl('SOSgetObservation');
$id = 1;
foreach ( $this->observedProperty as $sensor ) {
foreach ( $this->dataArray as $time => $val ) {
if ( floatval($val[$sensor]) != 0.0 ) {
$this->xmlTemplate->copyCode('observationData');
$this->xmlTemplate->tplReplaceOnce('time', date($this->sosTimeFormat, $time));
$this->xmlTemplate->tplReplaceOnce('id', $id);
$this->xmlTemplate->tplReplaceOnce('id', $id);
$this->xmlTemplate->tplReplaceOnce('id', $id);
$this->xmlTemplate->tplReplaceOnce('sensor', $sensor);
$this->xmlTemplate->tplReplaceOnce('unit', $this->units[$sensor]);
$this->xmlTemplate->tplReplaceOnce('value', $val[$sensor]);
$id++;
}
}
}
$this->xmlTemplate->cleanCode('observationData');
$this->xmlTemplate->tplReplace('feedId', $this->feedId);
$this->xmlTemplate->printTemplate();
}
private function printCapabilitiesXml() {
$this->xmlTemplate->readTpl('SOSgetCapabilities');
$this->xmlTemplate->printTemplate();
}
private function getDescribeSensorParameters() {
if ( isset($_GET['procedure']) ) {
$procedure = $_GET['procedure'];
if ( ! preg_match('/^[A-Za-z0-9:]+-+[0-9]{1,10}$/', $procedure) || ! strpos($procedure, 'airqualityegg-') ) {
die('<error>Error - The procedure parameter does not match the required format.</error>');
}
else {
$index = strpos($procedure, 'airqualityegg-') + 14;
$length = strlen($procedure) - $index;
$this->feedId = substr($procedure, $index, $length);
if ( ! is_numeric($this->feedId) ) {
die('<error>Error - Feed ID incorrect.</error>');
}
}
}
else {
die('<error>Error - No procedure specified. Please set the procedure parameter.</error>');
}
}
private function printDescribeSensorXml() {
$this->xmlTemplate->readTpl('SOSdescribeSensor');
$this->xmlTemplate->tplReplace('procedure', 'urn:ogc:object:feature:sensor:airqualityegg-'.$this->feedId);
$this->dataArray['lon'] = str_replace('°', '', $this->dataArray['lon']);
$this->dataArray['lat'] = str_replace('°', '', $this->dataArray['lat']);
$this->dataArray['lon'] = str_replace('°', '', $this->dataArray['lon']);
$this->dataArray['lat'] = str_replace('°', '', $this->dataArray['lat']);
$this->xmlTemplate->tplReplace('lon', $this->dataArray['lon']);
$this->xmlTemplate->tplReplace('lat', $this->dataArray['lat']);
if ( $this->dataArray['ele'] != translate('not_available') ) {
$alt = explode(' ', $this->dataArray['ele']);
if ( ! isset($alt[1]) ) { $alt[1] = 'unknown'; }
}
else {
$alt[1] = '';
$alt[0] = translate('not_available');
}
$this->xmlTemplate->tplReplace('alt_unit', $alt[1]);
$this->xmlTemplate->tplReplace('alt', $alt[0]);
$this->xmlTemplate->printTemplate();
}
}
new SOS();
?>