Validate publications with json schema

composer.json

@@ -44,8 +44,9 @@
 		"adbario/php-dot-notation": "^3.3.0",
 		"bamarni/composer-bin-plugin": "^1.8",
 		"elasticsearch/elasticsearch": "^v8.14.0",
-		"guzzlehttp/guzzle": "^7.0",		
+		"guzzlehttp/guzzle": "^7.0",
 		"mpdf/mpdf": "^8.2",
+		"opis/json-schema": "^2.3",
 		"symfony/twig-bundle": "^6.4",
 		"symfony/uid": "^6.4"
 	},

lib/Db/PublicationType.php

@@ -5,6 +5,7 @@
 use DateTime;
 use JsonSerializable;
 use OCP\AppFramework\Db\Entity;
+use OCP\IURLGenerator;
 
 class PublicationType extends Entity implements JsonSerializable
 {
@@ -122,4 +123,26 @@ public function jsonSerialize(): array
 
 		return $array;
 	}
+
+	public function getSchema(IURLGenerator $urlGenerator): object
+	{
+		$schema = [];
+		$schema['$schema']  = 'https://json-schema.org/draft/2020-12/schema';
+		$schema['$id']      = $urlGenerator->getAbsoluteURL($urlGenerator->linkToRoute('openregister.Schemas.show', ['id' => $this->getUuid()]));
+		$schema['type']     = 'object';
+		$schema['required'] = [];
+		$schema['properties'] = [];
+
+		foreach($this->getProperties() as $name => $property) {
+			if ($property['required'] === true) {
+				$schema['required'][] = $name;
+			}
+			unset($property['title'], $property['required']);
+
+			// Remove empty fields with array_filter(), and add it to the properties of the schema.
+			$schema['properties'][$name] = array_filter($property);
+		}
+
+		return json_decode(json_encode($schema));
+	}
 }

lib/Service/ObjectService.php

@@ -12,6 +12,7 @@
 use OCP\App\IAppManager;
 use OCP\AppFramework\Db\DoesNotExistException;
 use OCP\AppFramework\Db\MultipleObjectsReturnedException;
+use OCP\IURLGenerator;
 use Psr\Container\ContainerExceptionInterface;
 use Psr\Container\NotFoundExceptionInterface;
 use Symfony\Component\Uid\Uuid;
@@ -34,6 +35,8 @@ class ObjectService
 	/** @var string $appName The name of the app */
 	private string $appName;
 
+	private ValidationService $validationService;
+
 	/**
 	 * Constructor for ObjectService.
 	 *
@@ -59,8 +62,11 @@ public function __construct(
 		private ContainerInterface $container,
 		private readonly IAppManager $appManager,
 		private readonly IAppConfig $config,
+		IURLGenerator $urlGenerator,
 	) {
 		$this->appName = 'opencatalogi';
+
+		$this->validationService = new ValidationService(objectService: $this, urlGenerator: $urlGenerator);
 	}
 
 	/**
@@ -300,6 +306,11 @@ public function saveObject(string $objectType, array $object, bool $updateVersio
 	{
 		// Get the appropriate mapper for the object type
 		$mapper = $this->getMapper($objectType);
+
+		if($objectType === 'publication') {
+			$object = $this->validationService->validatePublication($object);
+		}
+
 		// If the object has an id, update it; otherwise, create a new object
 		if (isset($object['id']) === true) {
 			return $mapper->updateFromArray($object['id'], $object, $updateVersion);