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<?php |
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namespace GeoTimeZone\Geometry; |
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use Exception; |
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use geoPHP; |
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class Utils |
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{ |
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const POLYGON_GEOJSON_NAME = "Polygon"; |
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const POINT_WKT_NAME = "POINT"; |
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const FEATURE_COLLECTION_GEOJSON_NAME = "FeatureCollection"; |
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const FEATURE_GEOJSON_NAME = "Feature"; |
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const WKT_EXTENSION = "wkt"; |
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const GEOJSON_EXTENSION = "json"; |
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const NOT_FOUND_IN_FEATURES = "notFoundInFeatures"; |
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/** |
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* Convert array of coordinates to polygon structured json array |
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* @param $polygonPoints |
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* @return array |
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*/ |
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public function createPolygonJsonFromPoints($polygonPoints) |
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{ |
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return array( |
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'type' => self::POLYGON_GEOJSON_NAME, |
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'coordinates' => $this->structurePolygonCoordinates($polygonPoints) |
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); |
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} |
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/** |
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* Structure polygon coordinates as geoPHP needs |
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* @param $polygonPoints |
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* @return array |
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*/ |
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protected function structurePolygonCoordinates($polygonPoints) |
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{ |
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$structuredCoordinates = array(); |
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foreach ($polygonPoints as $points) { |
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if (count($points) == 2) { |
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$structuredCoordinates[] = $polygonPoints; |
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break; |
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} |
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$structuredCoordinates[] = $points; |
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} |
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return $structuredCoordinates; |
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} |
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/** |
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* Create polygon geometry object from polygon points array |
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* @param $polygonPoints |
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* @return bool|geoPHP::GeometryCollection|mixed |
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*/ |
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protected function createPolygonFromPoints($polygonPoints) |
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{ |
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$polygonData = $this->createPolygonJsonFromPoints($polygonPoints); |
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return $this->createPolygonFromJson(json_encode($polygonData)); |
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} |
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/** |
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* Create polygon geometry object from structured polygon data (as json) |
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* @param $polygonJson |
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* @return bool|geoPHP::GeometryCollection|mixed |
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*/ |
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public function createPolygonFromJson($polygonJson) |
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{ |
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$polygon = null; |
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try { |
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$polygon = geoPHP::load($polygonJson, self::GEOJSON_EXTENSION); |
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} catch (Exception $exception) { |
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echo $exception->getMessage(); |
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} |
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return $polygon; |
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} |
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/** |
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* Adapt quadrant bounds to polygon array format |
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* @param $quadrantBounds |
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* @return array |
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*/ |
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public function adaptQuadrantBoundsToPolygon($quadrantBounds) |
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{ |
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return array( |
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array( |
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array($quadrantBounds[0], $quadrantBounds[1]), |
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array($quadrantBounds[0], $quadrantBounds[3]), |
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array($quadrantBounds[2], $quadrantBounds[3]), |
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array($quadrantBounds[2], $quadrantBounds[1]), |
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array($quadrantBounds[0], $quadrantBounds[1]) |
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) |
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); |
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} |
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/** |
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* Create polygon object from quadrant bounds |
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* @param $quadrantBounds |
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* @return mixed |
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*/ |
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public function getQuadrantPolygon($quadrantBounds) |
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{ |
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$polygonPoints = $this->adaptQuadrantBoundsToPolygon($quadrantBounds); |
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return $this->createPolygonFromPoints($polygonPoints); |
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} |
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/** |
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* Structure features data |
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* @param $features |
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* @return array |
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*/ |
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protected function structureFeatures($features) |
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{ |
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$structuredFeatures = array(); |
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foreach ($features as $feature) { |
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$structuredFeatures[] = $this->structureOneFeature($feature); |
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} |
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return $structuredFeatures; |
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} |
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/** |
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* Structure an isolated feature |
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* @param $feature |
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* @return array |
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*/ |
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protected function structureOneFeature($feature) |
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{ |
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$structuredFeature = array( |
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"type" => self::FEATURE_GEOJSON_NAME, |
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"geometry" => array( |
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"type" => $feature['type'], |
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"coordinates" => $feature['coordinates'] |
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), |
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"properties" => $feature['properties'] |
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); |
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return $structuredFeature; |
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} |
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/** |
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* Create feature collection array from features list |
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* @param $features |
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* @return array |
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*/ |
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public function getFeatureCollection($features) |
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{ |
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$featuresCollection = array( |
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"type" => self::FEATURE_COLLECTION_GEOJSON_NAME, |
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"features" => $this->structureFeatures($features) |
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); |
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return $featuresCollection; |
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} |
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/** |
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* Get intersection data json from two different geometry features |
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* @param $geoFeaturesJsonA |
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* @param $geoFeaturesJsonB |
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* @return mixed |
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*/ |
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public function intersection($geoFeaturesJsonA, $geoFeaturesJsonB) |
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{ |
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$polygonA = $this->createPolygonFromJson($geoFeaturesJsonA); |
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$polygonB = $this->createPolygonFromJson($geoFeaturesJsonB); |
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$intersectionData = $polygonA->intersection($polygonB); |
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return $intersectionData->out(self::GEOJSON_EXTENSION, true); |
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} |
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/** |
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* Check if a particular object point is IN the indicated polygon (source: https://github.com/sookoll/geoPHP.git) |
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* and if it is not contained inside, it checks the boundaries |
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* @param $point |
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* @param $polygon |
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* @return mixed |
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*/ |
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protected function isInPolygon($point, $polygon) |
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{ |
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$isInside = false; |
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foreach ($polygon->components as $component) { |
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$polygonPoints = $component->getComponents(); |
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$numPoints = count($polygonPoints); |
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$pointIdxBack = $numPoints - 1; |
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for ($pointIdx = 0; $pointIdx < $numPoints; $pointIdx++) { |
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if ($this->isInside($point, $polygonPoints[$pointIdx], $polygonPoints[$pointIdxBack])) { |
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$isInside = true; |
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break; |
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} |
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$pointIdxBack = $pointIdx; |
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} |
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} |
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return $isInside; |
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} |
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/** |
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* Check if point is ON the boundaries of the polygon |
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* @param $point |
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* @param $polygon |
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* @return mixed |
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*/ |
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protected function isOnPolygonBoundaries($point, $polygon) |
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{ |
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return $polygon->pointOnVertex($point); |
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} |
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/** |
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* Check if the polygonA intersects with polygonB |
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* @param $polygonJsonA |
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* @param $polygonBoundsB |
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* @return mixed |
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* @internal param $polygonA |
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* @internal param $polygonB |
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*/ |
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public function intersectsPolygons($polygonJsonA, $polygonBoundsB) |
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{ |
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$polygonA = $this->createPolygonFromJson(json_encode($polygonJsonA)); |
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$polygonB = $this->getQuadrantPolygon($polygonBoundsB); |
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return $polygonA->intersects($polygonB); |
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} |
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/** |
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* Check if the polygonA is within polygonB |
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* @param $polygonBoundsOrigin |
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* @param $polygonJsonDest |
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* @return mixed |
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* @internal param $polygonA |
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* @internal param $polygonB |
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*/ |
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public function withinPolygon($polygonBoundsOrigin, $polygonJsonDest) |
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{ |
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$polygonDest = $this->createPolygonFromJson(json_encode($polygonJsonDest)); |
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$polygonOrig = $this->getQuadrantPolygon($polygonBoundsOrigin); |
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return $polygonOrig->within($polygonDest); |
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} |
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/** |
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* Create a point geometry object from coordinates (latitude, longitude) |
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* @param $latitude |
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* @param $longitude |
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* @return bool|geoPHP::GeometryCollection|mixed |
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*/ |
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protected function createPoint($latitude, $longitude) |
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{ |
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$point = null; |
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try { |
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$formattedPoint = self::POINT_WKT_NAME . "({$longitude} {$latitude})"; |
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$point = geoPHP::load($formattedPoint, self::WKT_EXTENSION); |
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} catch (Exception $exception) { |
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echo $exception->getMessage(); |
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} |
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return $point; |
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} |
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/** |
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* Check if point (latitude, longitude) is IN a particular features polygon |
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* @param $features |
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* @param $latitude |
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* @param $longitude |
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* @return null|string |
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*/ |
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public function isPointInQuadrantFeatures($features, $latitude, $longitude) |
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{ |
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$timeZone = self::NOT_FOUND_IN_FEATURES; |
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$point = $this->createPoint($latitude, $longitude); |
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if ($point != null) { |
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foreach ($features['features'] as $feature) { |
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foreach ($feature['geometry']['coordinates'] as $polygonFeatures) { |
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$polygon = $this->createPolygonFromJson( |
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json_encode($this->createPolygonJsonFromPoints( |
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$polygonFeatures |
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)) |
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); |
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if ($this->isInPolygon($point, $polygon) || |
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$this->isOnPolygonBoundaries($point, $polygon)) { |
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$timeZone = $feature['properties']['tzid']; |
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break; |
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} |
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} |
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} |
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} |
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return $timeZone; |
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} |
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/** |
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* Check if the point is between two points from the polygon |
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* @param $point |
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* @param $currentPolygonPoint |
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* @param $backPolygonPoint |
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* @return bool |
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*/ |
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protected function isInside($point, $currentPolygonPoint, $backPolygonPoint) |
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{ |
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return ($currentPolygonPoint->y() > $point->y()) != ($backPolygonPoint->y() > $point->y()) && |
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( |
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$point->x() < ($backPolygonPoint->x() - $currentPolygonPoint->x()) * |
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($point->y() - $currentPolygonPoint->y()) / ($backPolygonPoint->y() - $currentPolygonPoint->y()) + |
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$currentPolygonPoint->x() |
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); |
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} |
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} |
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