GeometryParser.php

<?php

namespace Spatial;

use CrEOF\Spatial\DBAL\Types\BinaryParser;
use CrEOF\Spatial\PHP\Types\Geometry\LineString;
use CrEOF\Spatial\PHP\Types\Geometry\Point;

class GeometryParser {

	protected $geometry;

	public function __construct($geometry)
	{
		$this->geometry = $geometry;
	}

	public static function fromBinary($binary)
	{
		$parser = new BinaryParser($binary);
		$parsed = $parser->parse();

		switch($parsed['type']) {
			case 'LINESTRING':
			   return new static(new LineString($parsed['value'], $parsed['srid']));
				break;

			case 'POINT':
				return new static(new Point($parsed['value'], $parsed['srid']));
				break;
		}
	}

	public static function fromGeoJSON($geoJSON)
	{
		$data = json_decode($geoJSON);
		$class = 'CrEOF\Spatial\PHP\Types\Geometry\\'.$data->type;
		$geometry = new $class($data->coordinates, $data->srid);
		return new static($geometry);
	}

	public function asGeometry()
	{
		return $this->geometry;
	}

	public function asSql()
	{
		$sridSQL = null;

		if (($srid = $this->geometry->getSrid()) !== null) {
			$sridSQL = sprintf('SRID=%d;', $srid);
		}

		return sprintf(
			'%s%s(%s)',
			$sridSQL,
			strtoupper($this->geometry->getType()),
			$this->geometry
		);
	}

	public function asGeoJSON()
	{
		$type = $this->geometry->getType();
		$points = $this->geometry->getPoints();
		$srid = $this->geometry->getSrid();

		$coordinates = array();
		foreach($points as $point)
		{
			$x = $point->getX();
			$y = $point->getY();
			$coordinates[] = array($x, $y);
		}

		return json_encode(array(
			"type" => $type,
			"coordinates" => $coordinates,
			"srid" => $srid
		));
	}

}