New Criterion "TagSubtree" matching the "path_string" of tags

bundle/API/Repository/Values/Content/Query/Criterion/TagSubtree.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Netgen\TagsBundle\API\Repository\Values\Content\Query\Criterion;
+
+use Ibexa\Contracts\Core\Repository\Values\Content\Query\Criterion;
+use Ibexa\Contracts\Core\Repository\Values\Content\Query\Criterion\Operator;
+use Ibexa\Contracts\Core\Repository\Values\Content\Query\Criterion\Operator\Specifications;
+
+/**
+ * A criterion that matches content based on tag subtree that is located in one of the fields.
+ *
+ * Supported operators:
+ * - EQ: matches against one tag ID
+ */
+final class TagSubtree extends Criterion
+{
+    /**
+     * @param int|int[] $value One or more tag IDs that must be matched
+     * @param string|null $target Field definition identifier to use
+     */
+    public function __construct($value, ?string $target = null)
+    {
+        parent::__construct($target, null, $value);
+    }
+
+    public function getSpecifications(): array
+    {
+        return [
+            new Specifications(
+                Operator::IN,
+                Specifications::FORMAT_ARRAY,
+                Specifications::TYPE_INTEGER | Specifications::TYPE_STRING
+            ),
+            new Specifications(
+                Operator::EQ,
+                Specifications::FORMAT_SINGLE,
+                Specifications::TYPE_INTEGER | Specifications::TYPE_STRING
+            ),
+        ];
+    }
+}

bundle/Core/Search/Legacy/Content/Common/Gateway/CriterionHandler/Tags/TagSubtree.php

@@ -0,0 +1,75 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Netgen\TagsBundle\Core\Search\Legacy\Content\Common\Gateway\CriterionHandler\Tags;
+
+use Doctrine\DBAL\Connection;
+use Doctrine\DBAL\Query\QueryBuilder;
+use Ibexa\Contracts\Core\Repository\Values\Content\Query\Criterion;
+use Ibexa\Core\Search\Legacy\Content\Common\Gateway\CriteriaConverter;
+use Netgen\TagsBundle\API\Repository\Values\Content\Query\Criterion\TagSubtree as TagSubtreeCriterion;
+use Netgen\TagsBundle\Core\Search\Legacy\Content\Common\Gateway\CriterionHandler\Tags;
+
+final class TagSubtree extends Tags
+{
+    public function accept(Criterion $criterion): bool
+    {
+        return $criterion instanceof TagSubtreeCriterion;
+    }
+
+    public function handle(CriteriaConverter $converter, QueryBuilder $queryBuilder, Criterion $criterion, array $languageSettings): string
+    {
+        $subSelect = $this->connection->createQueryBuilder();
+        $subSelect
+            ->select('t1.id')
+            ->from('ezcontentobject', 't1')
+            ->innerJoin(
+                't1',
+                'eztags_attribute_link',
+                't2',
+                $queryBuilder->expr()->andX(
+                    $queryBuilder->expr()->eq('t2.objectattribute_version', 't1.current_version'),
+                    $queryBuilder->expr()->eq('t2.object_id', 't1.id')
+                )
+            )
+            ->innerJoin(
+                't2',
+                'eztags',
+                't3',
+                $queryBuilder->expr()->eq('t2.keyword_id', 't3.id')
+            );
+
+
+        if (is_array($criterion->value)) {
+            foreach ($criterion->value as $value) {
+                $subSelect->orWhere(
+                    $queryBuilder->expr()->like(
+                        't3.path_string',
+                        $queryBuilder->createNamedParameter('%/' . $value . '/%')
+                    )
+                );
+            }
+        }
+
+        $fieldDefinitionIds = $this->getSearchableFields($criterion->target);
+        if ($fieldDefinitionIds !== null) {
+            $subSelect->innerJoin(
+                't2',
+                'ezcontentobject_attribute',
+                't3',
+                $queryBuilder->expr()->andX(
+                    $queryBuilder->expr()->eq('t3.id', 't2.objectattribute_id'),
+                    $queryBuilder->expr()->eq('t3.version', 't2.objectattribute_version')
+                )
+            )->andWhere(
+                $queryBuilder->expr()->in(
+                    't3.contentclassattribute_id',
+                    $queryBuilder->createNamedParameter($fieldDefinitionIds, Connection::PARAM_INT_ARRAY)
+                )
+            );
+        }
+
+        return $queryBuilder->expr()->in('c.id', $subSelect->getSQL());
+    }
+}

bundle/Resources/config/search/legacy.yaml

@@ -1,4 +1,11 @@
 services:
+    netgen_tags.search.legacy.gateway.criterion_handler.common.tag_subtree:
+        class: Netgen\TagsBundle\Core\Search\Legacy\Content\Common\Gateway\CriterionHandler\Tags\TagSubtree
+        parent: ibexa.search.legacy.gateway.criterion_handler.base
+        tags:
+            - { name: ibexa.search.legacy.gateway.criterion_handler.content }
+            - { name: ibexa.search.legacy.gateway.criterion_handler.location }
+
     netgen_tags.search.legacy.gateway.criterion_handler.common.tag_id:
         class: Netgen\TagsBundle\Core\Search\Legacy\Content\Common\Gateway\CriterionHandler\Tags\TagId
         parent: ibexa.search.legacy.gateway.criterion_handler.base