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<?php |
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namespace Smindel\GIS\Control; |
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use DOMDocument; |
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use Smindel\GIS\GIS; |
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use ReflectionClass; |
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use SimpleXMLElement; |
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class WebFeatureService extends AbstractGISWebServiceController |
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{ |
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private static $url_handlers = [ |
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'$Model' => 'handleAction', |
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]; |
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private static $type_map = [ |
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'Varchar' => 'string', |
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'Float' => 'decimal', // key tbc |
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'Datetime' => 'dateTime', // key tbc |
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'Int' => 'integer', // key tbc |
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]; |
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private static $ns = 'ssgis=https://github.com/smindel/silverstripe-gis'; |
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public function getConfig($model) |
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{ |
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$modelConfig = parent::getConfig($model); |
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if (!$modelConfig) { |
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return false; |
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} |
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$defaults = [ |
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'property_map' => singleton($model)->summaryFields(), |
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'feature_type_name' => (new ReflectionClass($model))->getShortName(), |
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]; |
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return is_array($modelConfig) ? array_merge($defaults, $modelConfig) : $defaults; |
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} |
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public function index($request) |
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{ |
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$operation = $request->requestVars()['request'] ?? (new SimpleXMLElement($raw = $request->getBody()))->getName(); |
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if (!in_array($operation, ['GetCapabilities', 'DescribeFeatureType', 'GetFeature'])) { |
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throw new Exception(sprintf('Unkown operation "%s" requested', $operation)); |
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} |
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return $this->$operation($request); |
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} |
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public function DescribeFeatureType($request) |
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{ |
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$model = $this->getModel($request); |
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$config = $this->getConfig($model); |
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$propertyMap = $config['property_map']; |
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if (count(array_intersect_key($params = array_intersect_key($request->requestVars(), array_fill_keys([ |
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'service', |
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'version', |
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'request', |
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'typeNames', |
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'exceptions', |
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'outputFormat', |
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], null)), array_fill_keys([ |
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'service', |
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'version', |
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'request', |
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'typeNames', |
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], null))) == 4) { |
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extract($params); |
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} else { |
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$xml = new SimpleXMLElement($raw = $request->getBody()); |
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$service = (string)$xml['service']; |
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$version = (string)$xml['version']; |
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$request = $xml->getName(); |
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$typeNames = []; |
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foreach ($xml->xpath('TypeName') as $typeName) { |
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$typeNames[] = (string)$typeName; |
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} |
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} |
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list($nsName, $nsUri) = explode('=', $config['ns']); |
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$dom = new DOMDocument('1.0','UTF-8'); |
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$schema = $dom->createElementNS('http://www.w3.org/2001/XMLSchema', 'schema'); |
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$schema->setAttribute('elementFormDefault', 'qualified'); |
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$schema->setAttribute('targetNamespace', $nsUri); |
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$schema->setAttribute('xmlns:gml', 'http://www.opengis.net/gml/3.2'); |
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$schema->setAttribute('xmlns:' . $nsName, $nsUri); |
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$complexType = $dom->createElement('complexType'); |
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$complexType->setAttribute('name', $nsName . ':' . $config['feature_type_name']); |
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$complexContent = $dom->createElement('complexContent'); |
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$extension = $dom->createElement('extension'); |
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$extension->setAttribute('base', 'gml:AbstractFeatureType'); |
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$sequence = $dom->createElement('sequence'); |
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foreach ($propertyMap as $fieldName => $propertyName) { |
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$element = $dom->createElement('element'); |
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$element->setAttribute('name', $propertyName); |
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$element->setAttribute('type', $this->config()->type_map[$model::config()->db[$fieldName]]); |
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$sequence->appendChild($element); |
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} |
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$element = $dom->createElement('element'); |
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$element->setAttribute('name', $config['geometry_field']); |
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$element->setAttribute('type', 'gml:GeometryPropertyType'); |
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$sequence->appendChild($element); |
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$extension->appendChild($sequence); |
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$complexContent->appendChild($extension); |
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$complexType->appendChild($complexContent); |
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$schema->appendChild($complexType); |
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$dom->appendChild($schema); |
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$response = $this->getResponse(); |
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$response->addHeader('content-type', 'text/xml; charset=utf-8'); |
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$response->setBody($dom->saveXML()); |
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return $response; |
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} |
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public function GetFeature($request) |
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{ |
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$model = $this->getModel($request); |
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$config = $this->getConfig($model); |
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$list = $this->getRecords($request); |
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$propertyMap = $config['property_map']; |
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if (count(array_intersect_key($params = array_intersect_key($request->requestVars(), array_fill_keys([ |
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'service', |
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'version', |
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'request', |
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'typeNames', |
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], null)), array_fill_keys([ |
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'service', |
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'version', |
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'request', |
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'typeNames', |
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], null))) == 4) { |
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extract($params); |
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} else { |
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$xml = new SimpleXMLElement($raw = $request->getBody()); |
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$service = (string)$xml['service']; |
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$version = (string)$xml['version']; |
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$request = $xml->getName(); |
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$typeNames = []; |
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foreach ($xml->xpath('TypeName') as $typeName) { |
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$typeNames[] = (string)$typeName; |
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} |
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} |
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list($nsName, $nsUri) = explode('=', $config['ns']); |
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$dom = new DOMDocument('1.0','UTF-8'); |
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$featureCollection = $dom->createElement('FeatureCollection'); |
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$featureCollection->setAttribute('xmlns:gml', 'http://www.opengis.net/gml'); |
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$featureCollection->setAttribute('xmlns:' . $nsName, $nsUri); |
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foreach($list as $item) { |
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if (!$item->canView()) { |
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continue; |
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} |
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$member = $dom->createElement('gml:featureMember'); |
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$record = $dom->createElement($nsName . ':' . $config['feature_type_name']); |
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$record->setAttribute('gml:id', $item->ID); |
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foreach ($propertyMap as $fieldName => $propertyName) { |
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$property = $dom->createElement($propertyName, $item->$fieldName); |
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$record->appendChild($property); |
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} |
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$Geometry = $dom->createElement($nsName . ':' . $config['geometry_field']); |
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$geometry_field = $config['geometry_field']; |
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$shape = $this->createGeometry($dom, $item->$geometry_field); |
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$Geometry->appendChild($shape); |
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$record->appendChild($Geometry); |
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$member->appendChild($record); |
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$featureCollection->appendChild($member); |
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} |
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$dom->appendChild($featureCollection); |
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$response = $this->getResponse(); |
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$response->addHeader('content-type', 'text/xml; charset=utf-8'); |
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$response->setBody($dom->saveXML()); |
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return $response; |
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} |
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function createGeometry(DOMDocument $dom, $value) |
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{ |
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return call_user_func([$this, 'create' . ($gis = GIS::create($value))->type . 'Geometry'], $dom, $gis); |
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} |
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function createPointGeometry(DOMDocument $dom, GIS $gis) |
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{ |
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$point = $dom->createElement('gml:Point'); |
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$point->setAttribute('srsName', 'urn:ogc:def:crs:EPSG::4326'); |
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$pos = $dom->createElement('gml:pos', implode(' ', $gis->coordinates)); |
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$point->appendChild($pos); |
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return $point; |
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} |
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function createLineStringGeometry(DOMDocument $dom, GIS $gis) |
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{ |
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$line = $dom->createElement('gml:LineString'); |
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$line->setAttribute('srsName', 'urn:ogc:def:crs:EPSG::' . $gis->srid); |
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$posList = $dom->createElement('gml:posList', implode(' ', array_map(function($point){return implode(' ', $point);}, $gis->coordinates))); |
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$line->appendChild($posList); |
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return $line; |
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} |
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function createPolygonGeometry(DOMDocument $dom, GIS $gis) |
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{ |
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$polygon = $dom->createElement('gml:Polygon'); |
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$polygon->setAttribute('srsName', 'urn:ogc:def:crs:EPSG::' . $gis->srid); |
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foreach ($gis->coordinates as $i => $ring) { |
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$exinterior = $dom->createElement('gml:' . ['exterior', 'interior'][$i]); |
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$linearRing = $dom->createElement('gml:LinearRing'); |
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$posList = $dom->createElement('gml:posList', implode(' ', array_map(function($point){return implode(' ', $point);}, $ring))); |
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$linearRing->appendChild($posList); |
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$exinterior->appendChild($linearRing); |
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$polygon->appendChild($exinterior); |
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} |
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return $polygon; |
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} |
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} |
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smindel /
silverstripe-gis
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