[Improvement] Default Asset Metadata should be in the index (#259)

* add default asset metadata to the index

* fix: store default metadata values only when set

Author: lukmzig

src/SearchIndexAdapter/DefaultSearch/Asset/PredefinedAssetMetadataProvider.php

@@ -27,6 +27,8 @@
  */
 final readonly class PredefinedAssetMetadataProvider implements MappingProviderInterface
 {
+    private const DEFAULT_METADATA = ['title', 'alt', 'copyright'];
+
     public function __construct(
         private LanguageServiceInterface $languageService,
         private FieldDefinitionServiceInterface $fieldDefinitionService
@@ -41,25 +43,15 @@ public function getMappingProperties(): array
         $languages = array_merge([MappingProperty::NOT_LOCALIZED_KEY], $this->languageService->getValidLanguages());
 
         foreach ($predefinedMetaDataList as $predefinedMetaData) {
-            $languageMapping = [
-                'properties' => [],
-            ];
-
-            if ($typeMapping = $this->getTypeMapping($predefinedMetaData->getType())) {
-                foreach ($languages as $language) {
-                    $languageMapping['properties'][$language] = $typeMapping;
-                }
-            }
-
             $mappingProperties[] = new MappingProperty(
                 $predefinedMetaData->getName(),
                 $predefinedMetaData->getType(),
-                $languageMapping,
+                $this->getLanguageMappingByType($languages, $predefinedMetaData->getType()),
                 $languages
             );
         }
 
-        return $mappingProperties;
+        return array_merge($mappingProperties, $this->getDefaultMetadataMapping($languages));
     }
 
     private function getTypeMapping(string $type): ?array
@@ -68,4 +60,37 @@ private function getTypeMapping(string $type): ?array
             ->getFieldDefinitionAdapter($type)
             ?->getIndexMapping();
     }
+
+    private function getLanguageMappingByType(array $languages, string $type): array
+    {
+        $languageMapping = [
+            'properties' => [],
+        ];
+
+        if ($typeMapping = $this->getTypeMapping($type)) {
+            foreach ($languages as $language) {
+                $languageMapping['properties'][$language] = $typeMapping;
+            }
+        }
+
+        return $languageMapping;
+    }
+
+    /**
+     * @return MappingProperty[]
+     */
+    private function getDefaultMetadataMapping(array $languages): array
+    {
+        $mappingProperties = [];
+        foreach (self::DEFAULT_METADATA as $metadata) {
+            $mappingProperties[] = new MappingProperty(
+                $metadata,
+                'input',
+                $this->getLanguageMappingByType($languages, 'input'),
+                $languages
+            );
+        }
+
+        return $mappingProperties;
+    }
 }

src/Service/SearchIndex/Asset/MetadataProviderService.php

@@ -52,10 +52,10 @@ public function getSearchableMetaDataForAsset(Asset $asset): array
             if (is_array($metadata) && isset($metadata['data'], $metadata['name'], $metadata['type'])) {
                 $mappingProperty = $metaDataMap[$metadata['name']] ?? null;
                 $language = $metadata['language'] ?? null;
-                $language = $language ?: MappingProperty::NOT_LOCALIZED_KEY;
+                $metadata['language'] = $language ?: MappingProperty::NOT_LOCALIZED_KEY;
                 if ($mappingProperty
                     && $mappingProperty->getType() === $metadata['type']
-                    && in_array($language, $mappingProperty->getLanguages(), true)
+                    && in_array($metadata['language'], $mappingProperty->getLanguages(), true)
                 ) {
                     $result[] = $metadata;
                 }