🍗 Simple EEL-Helper to filter nodes

Classes/Fusion/Helper/FilterNodesByReferenceHelper.php

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+<?php
+
+namespace ZuTeilen\NeosHelper\Fusion\Helper;
+
+use Neos\Eel\ProtectedContextAwareInterface;
+use Neos\ContentRepository\Domain\Model\NodeInterface;
+
+class FilterNodesByReferenceHelper implements ProtectedContextAwareInterface
+{
+
+    /**
+     * @param Array|NodeInterface $nodes
+     * @param Array|NodeInterface $filterReferences
+     * @param String $referenceProperty
+     * @return string
+     */
+    public function filterNodes($nodes, $filterReferences, $referenceProperty)
+    {
+        $filters = array();
+        $filteredNodes = array();
+
+        foreach ($filterReferences as $filter)
+        {
+            array_push($filters, $filter->getIdentifier());
+        }
+
+        foreach ($nodes as $node) {
+            if ($this->isNodeConnectedToReference($node, $filters, $referenceProperty))
+            {
+                array_push($filteredNodes, $node);
+            }
+
+        }
+        return $filteredNodes;
+    }
+
+    /**
+     * @param $node
+     * @param $filters
+     * @return bool
+     */
+    public function isNodeConnectedToReference($node, $filters, $referenceProperty)
+    {
+        $nodeReferences = $node->getProperty($referenceProperty);
+        if (!is_null($nodeReferences)) {
+            foreach ($nodeReferences as $nodeReference)
+            {
+                if (in_array($nodeReference->getIdentifier(), $filters))
+                {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+
+    /**
+     * All methods are considered safe, i.e. can be executed from within Eel
+     *
+     * @param string $methodName
+     * @return boolean
+     */
+    public function allowsCallOfMethod($methodName)
+    {
+        return TRUE;
+    }
+
+}

Configuration/Settings.yaml

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+Neos:
+  Fusion:
+    defaultContext:
+      'ZuTeilen.NeosHelper': 'ZuTeilen\NeosHelper\Fusion\Helper\FilterNodesByReferenceHelper'

composer.json

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+{
+    "description": "",
+    "type": "neos-package",
+    "name": "zuteilen/neoshelper",
+    "require": {
+        "neos/flow": "*"
+    },
+    "autoload": {
+        "psr-4": {
+            "ZuTeilen\\NeosHelper\\": "Classes/"
+        }
+    },
+    "extra": {
+        "neos": {
+            "package-key": "ZuTeilen.NeosHelper"
+        }
+    }
+}