[Filters] Add filter to list items without dependencies

doc/04_Searching_For_Data_In_Index/05_Search_Modifiers/README.md

@@ -38,10 +38,11 @@ $search->addModifier(new ParentIdFilter(1))
 
 ### Dependencies
 
-| Modifier                                                                                                                                       | Modifier Category | Description                                               |
-|------------------------------------------------------------------------------------------------------------------------------------------------|-------------------|-----------------------------------------------------------|
-| [RequiresFilter](https://github.com/pimcore/generic-data-index-bundle/blob/1.x/src/Model/Search/Modifier/Filter/Dependency/RequiresFilter.php) | Dependencies      | Get all elements which the given element requires.        |
-| [RequiredByFilter](https://github.com/pimcore/generic-data-index-bundle/blob/1.x/src/Model/Search/Modifier/Filter/Dependency/RequiredByFilter.php)    | Dependencies      | Get all elements which are required by the given element. |
+| Modifier                                                                                                                                                   | Modifier Category | Description                                             |
+|------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------|---------------------------------------------------------|
+| [RequiresFilter](https://github.com/pimcore/generic-data-index-bundle/blob/1.x/src/Model/Search/Modifier/Filter/Dependency/RequiresFilter.php)             | Dependencies      | Get all elements which the given element requires.      |
+| [RequiredByFilter](https://github.com/pimcore/generic-data-index-bundle/blob/1.x/src/Model/Search/Modifier/Filter/Dependency/RequiredByFilter.php)         | Dependencies      | Get all elements which are required by the given element. |
+| [NoDependenciesFilter](https://github.com/pimcore/generic-data-index-bundle/blob/1.x/src/Model/Search/Modifier/Filter/Dependency/NoDependenciesFilter.php) | Dependencies      | Get all elements which have no dependencies.      |
 
 
 ### Query Language

src/Model/Search/Modifier/Filter/Dependency/NoDependenciesFilter.php

@@ -0,0 +1,32 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Pimcore
+ *
+ * This source file is available under two different licenses:
+ * - GNU General Public License version 3 (GPLv3)
+ * - Pimcore Commercial License (PCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ *  @copyright  Copyright (c) Pimcore GmbH (http://www.pimcore.org)
+ *  @license    http://www.pimcore.org/license     GPLv3 and PCL
+ */
+
+namespace Pimcore\Bundle\GenericDataIndexBundle\Model\Search\Modifier\Filter\Dependency;
+
+use Pimcore\Bundle\GenericDataIndexBundle\Enum\SearchIndex\ElementType;
+use Pimcore\Bundle\GenericDataIndexBundle\Model\Search\Modifier\SearchModifierInterface;
+
+final readonly class NoDependenciesFilter implements SearchModifierInterface
+{
+    public function __construct(private ?ElementType $elementType = null)
+    {
+    }
+
+    public function getElementType(): ?ElementType
+    {
+        return $this->elementType;
+    }
+}

src/SearchIndexAdapter/OpenSearch/Search/Modifier/Filter/DependencyFilters.php

@@ -24,6 +24,7 @@
 use Pimcore\Bundle\GenericDataIndexBundle\Model\OpenSearch\Query\BoolQuery;
 use Pimcore\Bundle\GenericDataIndexBundle\Model\OpenSearch\Query\TermFilter;
 use Pimcore\Bundle\GenericDataIndexBundle\Model\OpenSearch\Query\TermsFilter;
+use Pimcore\Bundle\GenericDataIndexBundle\Model\Search\Modifier\Filter\Dependency\NoDependenciesFilter;
 use Pimcore\Bundle\GenericDataIndexBundle\Model\Search\Modifier\Filter\Dependency\RequiredByFilter;
 use Pimcore\Bundle\GenericDataIndexBundle\Model\Search\Modifier\Filter\Dependency\RequiresFilter;
 use Pimcore\Bundle\GenericDataIndexBundle\Service\Search\SearchService\Element\ElementSearchServiceInterface;
@@ -104,4 +105,23 @@ public function handleRequiresFilter(
             ])
         );
     }
+
+    #[AsSearchModifierHandler]
+    public function handleFilterWithoutDependencies(
+        NoDependenciesFilter $noDependenciesFilter,
+        SearchModifierContextInterface $context
+    ): void {
+        $boolQuery = new BoolQuery();
+        $boolQuery->addCondition(
+            ConditionType::MUST_NOT->value,
+            [
+                ConditionType::EXISTS->value => [
+                    'field' => SystemField::DEPENDENCIES->getPath(
+                        $noDependenciesFilter->getElementType()?->getShortValue()
+                    ),
+                ],
+            ]
+        )->toArray(true);
+        $context->getSearch()->addQuery($boolQuery);
+    }
 }

tests/Functional/Search/Modifier/Filter/DependencyFiltersTest.php

@@ -16,9 +16,11 @@
 namespace Pimcore\Bundle\GenericDataIndexBundle\Tests\Functional\Search\Modifier\Filter;
 
 use Pimcore\Bundle\GenericDataIndexBundle\Enum\SearchIndex\ElementType;
+use Pimcore\Bundle\GenericDataIndexBundle\Model\Search\Modifier\Filter\Dependency\NoDependenciesFilter;
 use Pimcore\Bundle\GenericDataIndexBundle\Model\Search\Modifier\Filter\Dependency\RequiredByFilter;
 use Pimcore\Bundle\GenericDataIndexBundle\Model\Search\Modifier\Filter\Dependency\RequiresFilter;
 use Pimcore\Bundle\GenericDataIndexBundle\Service\Search\SearchService\Asset\AssetSearchServiceInterface;
+use Pimcore\Bundle\GenericDataIndexBundle\Service\Search\SearchService\DataObject\DataObjectSearchServiceInterface;
 use Pimcore\Bundle\GenericDataIndexBundle\Service\Search\SearchService\SearchProviderInterface;
 use Pimcore\Model\DataObject\Unittest;
 use Pimcore\Tests\Support\Util\TestHelper;
@@ -83,6 +85,48 @@ public function testDependencyFilters()
         $this->assertIdArrayEquals([$object2->getId(), $object3->getId()], $searchResult->getIds());
     }
 
+    // tests
+    public function testNoDependencyFilter()
+    {
+        /**
+         * @var Unittest $object1
+         * @var Unittest $object2
+         * @var Unittest $object3
+         * @var Unittest $object4
+         */
+        $object1 = TestHelper::createEmptyObject();
+        $object2 = TestHelper::createEmptyObject();
+        $object3 = TestHelper::createEmptyObject();
+        $object4 = TestHelper::createEmptyObject();
+
+        $image1 = TestHelper::createImageAsset();
+
+        $object1
+            ->setObjects([$object2, $object3])
+            ->setImage($image1)
+            ->save()
+        ;
+
+        $object4->setObjects([$object1])->save();
+
+        /** @var DataObjectSearchServiceInterface $searchService */
+        $searchService = $this->tester->grabService('generic-data-index.test.service.data-object-search-service');
+        /** @var SearchProviderInterface $searchProvider */
+        $searchProvider = $this->tester->grabService(SearchProviderInterface::class);
+
+        $elementSearch = $searchProvider->createDataObjectSearch()->addModifier(new NoDependenciesFilter());
+        $searchResult = $searchService->search($elementSearch);
+        // Object 2 and 3 have no dependencies
+        $this->assertIdArrayEquals([$object2->getId(), $object3->getId()], $searchResult->getIds());
+
+        $elementSearch = $searchProvider->createDataObjectSearch()->addModifier(
+            new NoDependenciesFilter(ElementType::ASSET)
+        );
+        $searchResult = $searchService->search($elementSearch);
+        // Only Object 1 has no asset dependencies
+        $this->assertIdArrayEquals([$object2->getId(), $object3->getId(), $object4->getId()], $searchResult->getIds());
+    }
+
     private function assertIdArrayEquals(array $ids1, array $ids2)
     {
         sort($ids1);