/**
* Gets HAL components of the resource: states, links and embedded.
*
* @param object $object
* @param string|null $format
* @param array $context
*
* @return array
*/
private function getComponents($object, string $format = null, array $context)
{
if (isset($this->componentsCache[$context['cache_key']])) {
return $this->componentsCache[$context['cache_key']];
}
$attributes = parent::getAttributes($object, $format, $context);
$options = $this->getFactoryOptions($context);
$components = ['states' => [], 'links' => [], 'embedded' => []];
foreach ($attributes as $attribute) {
$propertyMetadata = $this->propertyMetadataFactory->create($context['resource_class'], $attribute, $options);
$type = $propertyMetadata->getType();
$isOne = $isMany = false;
if (null !== $type) {
if ($type->isCollection()) {
$valueType = $type->getCollectionValueType();
$isMany = null !== $valueType && ($className = $valueType->getClassName()) && $this->resourceClassResolver->isResourceClass($className);
} else {
$className = $type->getClassName();
$isOne = $className && $this->resourceClassResolver->isResourceClass($className);
}
}
if (!$isOne && !$isMany) {
$components['states'][] = $attribute;
continue;
}
$relation = ['name' => $attribute, 'cardinality' => $isOne ? 'one' : 'many'];
if ($propertyMetadata->isReadableLink()) {
$components['embedded'][] = $relation;
}
$components['links'][] = $relation;
}
return $this->componentsCache[$context['cache_key']] = $components;
}
