FEATURE: Add findByCriteria and findByIdentifier flowQuery operation

`findByCriteria` allows to query the subgraph below the contextNode
arguments:
- string | null: nodeTypefilter
- string | null: propertyValueCriteria
- object{offset?:int, limit?:int} | null: pagination

`findByIdentifier` will find a node with the given aggregate id in the subgraph defined by the contextNode
arguments:
- string: nodeAggregateId

Resolves: neos#5434

Neos.ContentRepository.NodeAccess/Classes/FlowQueryOperations/FindByCriteriaOperation.php

@@ -0,0 +1,170 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Neos\ContentRepository\NodeAccess\FlowQueryOperations;
+
+/*
+ * This file is part of the Neos.ContentRepository package.
+ *
+ * (c) Contributors of the Neos Project - www.neos.io
+ *
+ * This package is Open Source Software. For the full copyright and license
+ * information, please view the LICENSE file which was distributed with this
+ * source code.
+ */
+
+use Neos\Flow\Annotations as Flow;
+use Neos\ContentRepository\Core\Projection\ContentGraph\Filter\FindDescendantNodesFilter;
+use Neos\ContentRepository\Core\Projection\ContentGraph\Filter\NodeType\NodeTypeCriteria;
+use Neos\ContentRepository\Core\Projection\ContentGraph\Filter\Pagination\Pagination;
+use Neos\ContentRepository\Core\Projection\ContentGraph\Filter\PropertyValue\PropertyValueCriteriaParser;
+use Neos\ContentRepository\Core\Projection\ContentGraph\Node;
+use Neos\ContentRepositoryRegistry\ContentRepositoryRegistry;
+use Neos\Eel\FlowQuery\FlowQuery;
+use Neos\Eel\FlowQuery\FlowQueryException;
+use Neos\Eel\FlowQuery\Operations\AbstractOperation;
+
+/**
+ * "findByCriteria" operation working on ContentRepository nodes. This operation allows for retrieval of descendant nodes
+ *
+ *  Argument 1 (string|null): nodeTypeFilter, A list of NodeType Names seperated by ",", disallowed NodeTypes are prefixed with "!"
+ *
+ *  Argument 2 (string|null): propertyValueCriteria A property criteria in the form
+ *
+ *  property criteria are specified as "<property> <operator> <value>". Multiple criteria can be combined using "AND", "OR", "NOT" and "()"
+ *
+ *
+ *  property criteria support the following comparison operators:
+ *
+ *  =~  : Strict equality of case-insensitive value and operand
+ *  =   : Strict equality of value and operand
+ *  !=~ : Strict inequality of case-insensitive value and operand
+ *  !=  : Strict inequality of value and operand
+ *  <   : Value is less than operand
+ *  <=  : Value is less than or equal to operand
+ *  >   : Value is greater than operand
+ *  >=  : Value is greater than or equal to operand
+ *  $=~ : Value ends with operand (string-based) or case-insensitive value's last element is equal to operand (array-based)
+ *  $=  : Value ends with operand (string-based) or value's last element is equal to operand (array-based)
+ *  ^=~ : Value starts with operand (string-based) or case-insensitive value's first element is equal to operand (array-based)
+ *  ^=  : Value starts with operand (string-based) or value's first element is equal to operand (array-based)
+ *  *=~ : Value contains operand (string-based) or case-insensitive value contains an element that is equal to operand (array based)
+ *  *=  : Value contains operand (string-based) or value contains an element that is equal to operand (array based)
+ *
+ * criteria can be combined using "AND" and "OR":
+ *
+ *   "prop1 ^= 'foo' AND (prop2 = 'bar' OR prop3 = 'baz')"
+ *
+ *  furthermore "NOT" can be used to negate a whole sub query
+ *
+ *   "prop1 ^= 'foo' AND NOT (prop2 = 'bar' OR prop3 = 'baz')"
+ *
+ * Argument 3 ({limit?:int, offset?:int}}): Pagination of the date
+ *
+ *
+ * Example (node type):
+ *
+ *  q(node).findByCriteria('Neos.NodeTypes:Text')
+ *
+ * Example (multiple node types):
+ *
+ *  q(node).findByCriteria('Neos.NodeTypes:Text,Neos.NodeTypes:Image')
+ *
+ * Example (node type with property filter):
+ *
+ *  q(node).findByCriteria('Neos.NodeTypes:Text', 'text*="Neos"')
+ *
+ *  Example (node type with property filter and pagination):
+ *
+ *   q(node).findByCriteria('Neos.NodeTypes:Document', 'title*="Flow"', {limit:10, offset:2})
+ */
+class FindByCriteriaOperation extends AbstractOperation
+{
+    use CreateNodeHashTrait;
+
+    /**
+     * {@inheritdoc}
+     *
+     * @var string
+     */
+    protected static $shortName = 'findByCriteria';
+
+    /**
+     * {@inheritdoc}
+     *
+     * @var integer
+     */
+    protected static $priority = 100;
+
+    /**
+     * @Flow\Inject
+     * @var ContentRepositoryRegistry
+     */
+    protected $contentRepositoryRegistry;
+
+    /**
+     * {@inheritdoc}
+     *
+     * @param array<int,mixed> $context (or array-like object) onto which this operation should be applied
+     * @return boolean true if the operation can be applied onto the $context, false otherwise
+     */
+    public function canEvaluate($context)
+    {
+        foreach ($context as $contextNode) {
+            if (!$contextNode instanceof Node) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+    /**
+     * This operation operates rather on the given Context object than on the given node
+     * and thus may work with the legacy node interface until subgraphs are available
+     * {@inheritdoc}
+     *
+     * @param FlowQuery<int,mixed> $flowQuery the FlowQuery object
+     * @param array<int,mixed> $arguments the arguments for this operation
+     * @throws FlowQueryException
+     * @throws \Neos\Eel\Exception
+     * @throws \Neos\Eel\FlowQuery\FizzleException
+     */
+    public function evaluate(FlowQuery $flowQuery, array $arguments): void
+    {
+        /** @var array<int,Node> $contextNodes */
+        $contextNodes = $flowQuery->getContext();
+        if (count($contextNodes) === 0) {
+            return;
+        }
+
+        $firstContextNode = reset($contextNodes);
+        assert($firstContextNode instanceof Node);
+
+        $nodeTypeFilter = $arguments[0] ?? null;
+        $propertyValueFilter = $arguments[1] ?? null;
+        $pagination =  $arguments[2] ?? null;
+
+        assert($nodeTypeFilter === null || is_string($nodeTypeFilter));
+        assert($propertyValueFilter === null || is_string($propertyValueFilter));
+        assert($pagination === null || is_array($pagination));
+
+        /** @var Node[] $result */
+        $result = [];
+        $findDescendentNodesFilter = FindDescendantNodesFilter::create(
+            nodeTypes: $nodeTypeFilter ? NodeTypeCriteria::fromFilterString($nodeTypeFilter) : null,
+            propertyValue: $propertyValueFilter ? PropertyValueCriteriaParser::parse($propertyValueFilter) : null,
+            pagination: $pagination ? Pagination::fromArray($pagination) : null
+        );
+
+        /** @var Node $contextNode */
+        foreach ($flowQuery->getContext() as $contextNode) {
+            $subgraph = $this->contentRepositoryRegistry->subgraphForNode($contextNode);
+            foreach ($subgraph->findDescendantNodes($contextNode->aggregateId, $findDescendentNodesFilter) as $descendant) {
+                $result[] = $descendant;
+            }
+        }
+
+        $flowQuery->setContext($result);
+    }
+}

Neos.ContentRepository.NodeAccess/Classes/FlowQueryOperations/FindByIdentifierOperation.php

@@ -0,0 +1,111 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Neos\ContentRepository\NodeAccess\FlowQueryOperations;
+
+/*
+ * This file is part of the Neos.ContentRepository package.
+ *
+ * (c) Contributors of the Neos Project - www.neos.io
+ *
+ * This package is Open Source Software. For the full copyright and license
+ * information, please view the LICENSE file which was distributed with this
+ * source code.
+ */
+
+use Neos\Flow\Annotations as Flow;
+use Neos\ContentRepository\Core\Projection\ContentGraph\Node;
+use Neos\ContentRepository\Core\SharedModel\Node\NodeAggregateId;
+use Neos\ContentRepositoryRegistry\ContentRepositoryRegistry;
+use Neos\Eel\FlowQuery\FlowQuery;
+use Neos\Eel\FlowQuery\FlowQueryException;
+use Neos\Eel\FlowQuery\Operations\AbstractOperation;
+
+/**
+ * "findByIdentifier" operation working on ContentRepository nodes. This operation allows for retrieval of nodes by identifier
+ * from the current subgraph
+ *
+ * Example:
+ *
+ *  q(site).findByIdentifier('30e893c1-caef-0ca5-b53d-e5699bb8e506')
+ */
+class FindByIdentifierOperation extends AbstractOperation
+{
+    use CreateNodeHashTrait;
+
+    /**
+     * {@inheritdoc}
+     *
+     * @var string
+     */
+    protected static $shortName = 'findByIdentifier';
+
+    /**
+     * {@inheritdoc}
+     *
+     * @var integer
+     */
+    protected static $priority = 100;
+
+    /**
+     * @Flow\Inject
+     * @var ContentRepositoryRegistry
+     */
+    protected $contentRepositoryRegistry;
+
+    /**
+     * {@inheritdoc}
+     *
+     * @param array<int,mixed> $context (or array-like object) onto which this operation should be applied
+     * @return boolean true if the operation can be applied onto the $context, false otherwise
+     */
+    public function canEvaluate($context)
+    {
+        foreach ($context as $contextNode) {
+            if (!$contextNode instanceof Node) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+    /**
+     * This operation operates rather on the given Context object than on the given node
+     * and thus may work with the legacy node interface until subgraphs are available
+     * {@inheritdoc}
+     *
+     * @param FlowQuery<int,mixed> $flowQuery the FlowQuery object
+     * @param array<int,mixed> $arguments the arguments for this operation
+     * @throws FlowQueryException
+     * @throws \Neos\Eel\Exception
+     * @throws \Neos\Eel\FlowQuery\FizzleException
+     */
+    public function evaluate(FlowQuery $flowQuery, array $arguments): void
+    {
+        /** @var array<int,Node> $contextNodes */
+        $contextNodes = $flowQuery->getContext();
+        if (count($contextNodes) === 0 || empty($arguments[0])) {
+            return;
+        }
+
+        $firstContextNode = reset($contextNodes);
+        assert($firstContextNode instanceof Node);
+
+        $nodeAggregateId = NodeAggregateId::fromString($arguments[0]);
+
+        /** @var Node[] $result */
+        $result = [];
+
+        /** @var Node $contextNode */
+        foreach ($flowQuery->getContext() as $contextNode) {
+            $subgraph = $this->contentRepositoryRegistry->subgraphForNode($contextNode);
+            $nodeByIdentifier = $subgraph->findNodeById($nodeAggregateId);
+            if ($nodeByIdentifier) {
+                $result[] = $nodeByIdentifier;
+            }
+        }
+
+        $flowQuery->setContext($result);
+    }
+}

Neos.Neos/Tests/Behavior/Features/Fusion/FlowQuery.feature

@@ -375,6 +375,48 @@ Feature: Tests for the "Neos.ContentRepository" Flow Query methods.
     absolutePath: a1b
     """
 
+  Scenario: FindByCriteria
+    When the Fusion context node is "a1"
+    When I execute the following Fusion code:
+    """fusion
+    test = Neos.Fusion:DataStructure {
+      nodeTypeFilter = ${q(node).findByCriteria('Neos.Neos:Test.DocumentType2').get()}
+      nodeTypeExcludeFilter = ${q(node).findByCriteria('Neos.Neos:Document,!Neos.Neos:Test.DocumentType1').get()}
+      nodeTypeCombinedFilter = ${q(node).findByCriteria('Neos.Neos:Test.Document1,Neos.Neos:Test.DocumentType2a').get()}
+      nodeTypeFilterWithLimit = ${q(node).findByCriteria('Neos.Neos:Test.DocumentType2', null, {limit:2, offset:3}).get()}
+      propertyFilter = ${q(node).findByCriteria(null, 'uriPathSegment*="b1"').get()}
+      propertyAndNodeTypeFilter = ${q(node).findByCriteria('Neos.Neos:Test.DocumentType2a', 'uriPathSegment*="b1"').get()}
+      @process.render = Neos.Neos:Test.RenderNodesDataStructure
+    }
+    """
+    Then I expect the following Fusion rendering result:
+    """
+    nodeTypeFilter: a1a,a1a2,a1b2,a1a3,a1a4,a1a5,a1a6,a1b1a
+    nodeTypeExcludeFilter: a1a,a1a2,a1b2,a1a3,a1a4,a1a5,a1a6,a1b1a
+    nodeTypeCombinedFilter: a1a,a1a2,a1b2,a1a3,a1a4,a1a5,a1a6,a1b1a
+    nodeTypeFilterWithLimit: a1a3,a1a4
+    propertyFilter: a1b1,a1b1a,a1b1b
+    propertyAndNodeTypeFilter: a1b1a
+    """
+
+  Scenario: FindByIdentifier
+    When the Fusion context node is "a1"
+    When I execute the following Fusion code:
+    """fusion
+    test = Neos.Fusion:DataStructure {
+      child = ${q(node).findByIdentifier('a1b1').get()}
+      grandchild = ${q(node).findByIdentifier('a1b1a').get()}
+      sibling = ${q(node).findByIdentifier('a2').get()}
+      @process.render = Neos.Neos:Test.RenderNodesDataStructure
+    }
+    """
+    Then I expect the following Fusion rendering result:
+    """
+    child: a1b1
+    grandchild: a1b1a
+    sibling: a2
+    """
+
   Scenario: Unique
     When I execute the following Fusion code:
     """fusion