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 $request) {
if (isset($defaults[$this->target])) {
// no need to do anything
return $defaults;
}
if (!isset($defaults[$this->source])) {
return $defaults;
}
$defaults[$this->target] = $this->value;
return $defaults;
}