fix(schemaorg): Enumeration type detection improved (#401)

* Enumeration type detection improved by traversing the graph and checking if one of the parent elements is of type schema.org/Enumeration

* Update src/Schema/Model/Class_.php

Co-authored-by: Alan Poulain <contact@alanpoulain.eu>

* Update src/Schema/Model/Class_.php

Co-authored-by: Alan Poulain <contact@alanpoulain.eu>

* Update src/Schema/Model/Class_.php

Co-authored-by: Alan Poulain <contact@alanpoulain.eu>

* removed PHPDoc

* fix CS

---------

Co-authored-by: steven <steven@elektropost.io>
Co-authored-by: Alan Poulain <contact@alanpoulain.eu>
Co-authored-by: Kévin Dunglas <kevin@dunglas.fr>

Author: 4 people

src/Schema/Model/Class_.php

@@ -66,10 +66,10 @@ public function getSubClassOf(): array
         return array_filter($this->resource->all('rdfs:subClassOf', 'resource'), static fn (RdfResource $resource) => !$resource->isBNode());
     }
 
-    public function isEnum(): bool
+    public function isEnum(RdfResource $resource = null): bool
     {
-        $subClassOf = $this->resource->get('rdfs:subClassOf');
+        $parentClass = ($resource ?? $this->resource)->get('rdfs:subClassOf');
 
-        return $subClassOf && self::SCHEMA_ORG_ENUMERATION === $subClassOf->getUri();
+        return $parentClass && (self::SCHEMA_ORG_ENUMERATION === $parentClass->getUri() || $this->isEnum($parentClass));
     }
 }