Update the defaults based on its own data and the request.
array $defaults the getRouteDefaults array:
array the modified defaults. Each enhancer MUST return the $defaults but may add or remove values
Overrides RouteEnhancerInterface::enhance
public function enhance(array $defaults, Request $request) {
if (empty($defaults['_controller']) && !empty($defaults['_content'])) {
$type = $this->negotiation
->getContentType($request);
if (isset($this->types[$type])) {
$defaults['_controller'] = $this->types[$type];
}
}
return $defaults;
}