phpvms/app/Models/GeoJson.php
2018-01-01 19:02:22 -06:00

72 lines
1.6 KiB
PHP

<?php
namespace App\Models;
use \GeoJson\Geometry\Point;
use \GeoJson\Geometry\LineString;
use \GeoJson\Feature\Feature;
use \GeoJson\Feature\FeatureCollection;
/**
* Return different points/features in GeoJSON format
* https://tools.ietf.org/html/rfc7946
*
* Once a PIREP is accepted, save this returned structure as a
* JSON-encoded string into the raw_data field of the PIREP row
*
* @package App\Models
*/
class GeoJson
{
/**
* @var int
*/
protected $counter;
/**
* @var array [lon, lat] pairs
*/
protected $line_coords = [];
/**
* @var Feature[]
*/
protected $point_coords = [];
/**
* @param $lat
* @param $lon
* @param array $attrs Attributes of the Feature
*/
public function addPoint($lat, $lon, array $attrs)
{
$this->line_coords[] = [$lon, $lat];
$this->point_coords[] = new Feature(new Point([$lon, $lat]), $attrs);
++$this->counter;
}
/**
* Get the FeatureCollection for the line
* @return FeatureCollection
*/
public function getLine(): FeatureCollection
{
if(empty($this->line_coords) || \count($this->line_coords) < 2) {
return new FeatureCollection([]);
}
return new FeatureCollection([
new Feature(new LineString($this->line_coords))
]);
}
/**
* Get the feature collection of all the points
* @return FeatureCollection
*/
public function getPoints(): FeatureCollection
{
return new FeatureCollection($this->point_coords);
}
}