/**
* @param SimpleXMLElement $xml
* @return GPX
* @throws InvalidGPXException
*/
public static function fromXML(SimpleXMLElement $xml)
{
if ($xml->getName() != 'gpx') {
throw new InvalidGPXException("Root node should be 'gpx'");
}
$attributes = $xml->attributes();
$version = $attributes['version'];
if ($version != 1.1) {
throw new InvalidGPXException("Invalid GPX version. This library only supports GPX 1.1");
}
if (!($creator = $attributes['creator'])) {
throw new InvalidGPXException("No creator specified on GPX node.");
}
$gpx = new GPX((double) $version, (string) $creator);
if (!empty($xml->metadata)) {
$gpx->setMetadata(Metadata::fromXML($xml->metadata[0]));
}
if (!empty($xml->wpt)) {
$waypoints = [];
foreach ($xml->wpt as $waypoint) {
array_push($waypoints, Waypoint::fromXML($waypoint));
}
$gpx->setWaypoints($waypoints);
}
if (!empty($xml->rte)) {
$routes = [];
foreach ($xml->rte as $route) {
array_push($routes, Route::fromXML($route));
}
$gpx->setRoutes($routes);
}
if (!empty($xml->trk)) {
$tracks = [];
foreach ($xml->trk as $track) {
array_push($tracks, Track::fromXML($track));
}
$gpx->setTracks($tracks);
}
if (!empty($xml->extensions)) {
$gpx->setExtensions(Extensions::fromXML($xml->extensions[0]));
}
return $gpx;
}