/**
* We get the node interface and field from the relay library.
*
* The first method is the way we resolve an ID to its object. The second is the
* way we resolve an object that implements node to its type.
*/
protected static function getNodeDefinition()
{
if (self::$nodeDefinition === null) {
$nodeDefinition = Relay::nodeDefinitions(function ($globalId) {
$idComponents = Relay::fromGlobalId($globalId);
if ($idComponents['type'] === 'Faction') {
return StarWarsData::getFaction($idComponents['id']);
} else {
if ($idComponents['type'] === 'Ship') {
return StarWarsData::getShip($idComponents['id']);
} else {
return null;
}
}
}, function ($object) {
return isset($object['ships']) ? self::getFactionType() : self::getShipType();
});
self::$nodeDefinition = $nodeDefinition;
}
return self::$nodeDefinition;
}
