91 lines
2.0 KiB
PHP
91 lines
2.0 KiB
PHP
<?php namespace MapGuesser\Util\Geo;
|
|
|
|
class Bounds
|
|
{
|
|
private float $southLat;
|
|
private float $westLng;
|
|
|
|
private float $northLat;
|
|
private float $eastLng;
|
|
|
|
private bool $initialized = false;
|
|
|
|
public static function createWithPosition(Position $position): Bounds
|
|
{
|
|
$instance = new static();
|
|
|
|
$instance->initialize($position);
|
|
|
|
return $instance;
|
|
}
|
|
|
|
public static function createDirectly(float $southLat, $westLng, $northLat, $eastLng): Bounds
|
|
{
|
|
$instance = new static();
|
|
|
|
$instance->southLat = $southLat;
|
|
$instance->westLng = $westLng;
|
|
$instance->northLat = $northLat;
|
|
$instance->eastLng = $eastLng;
|
|
|
|
$instance->initialized = true;
|
|
|
|
return $instance;
|
|
}
|
|
|
|
public function extend(Position $position): void
|
|
{
|
|
if (!$this->initialized) {
|
|
$this->initialize($position);
|
|
|
|
return;
|
|
}
|
|
|
|
$lat = $position->getLat();
|
|
$lng = $position->getLng();
|
|
|
|
if ($lat < $this->southLat) {
|
|
$this->southLat = $lat;
|
|
}
|
|
|
|
if ($lng < $this->westLng) {
|
|
$this->westLng = $lng;
|
|
}
|
|
|
|
if ($lat > $this->northLat) {
|
|
$this->northLat = $lat;
|
|
}
|
|
|
|
if ($lng > $this->eastLng) {
|
|
$this->eastLng = $lng;
|
|
}
|
|
}
|
|
|
|
public function toJson(): string
|
|
{
|
|
if (!$this->initialized) {
|
|
throw new \Exception("Bounds are not initialized!");
|
|
}
|
|
|
|
return json_encode([
|
|
'south' => $this->southLat,
|
|
'west' => $this->westLng,
|
|
'north' => $this->northLat,
|
|
'east' => $this->eastLng,
|
|
]);
|
|
}
|
|
|
|
private function initialize(Position $position)
|
|
{
|
|
$lat = $position->getLat();
|
|
$lng = $position->getLng();
|
|
|
|
$this->northLat = $lat;
|
|
$this->westLng = $lng;
|
|
$this->southLat = $lat;
|
|
$this->eastLng = $lng;
|
|
|
|
$this->initialized = true;
|
|
}
|
|
}
|