composer.json - move tests-related classes to "autoload-dev" section (used for development purposes only and avoid polluting the autoloader in production)

src/Utilities/Xml.php

@@ -0,0 +1,54 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Utilities;
+
+use DOMDocument;
+use DOMXPath;
+use SimpleXMLElement;
+
+/**
+ * Useful XML-related methods (only static functions)
+ *
+ * @author    Krzysztof Niziol <krzysztof.niziol@meritoo.pl>
+ * @copyright Meritoo.pl
+ */
+class Xml
+{
+    /**
+     * Merges nodes of given elements.
+     * Returns merged instance of SimpleXMLElement.
+     *
+     * @param SimpleXMLElement $element1 First element to merge
+     * @param SimpleXMLElement $element2 Second element to merge
+     * @return SimpleXMLElement
+     */
+    public static function mergeNodes(SimpleXMLElement $element1, SimpleXMLElement $element2)
+    {
+        $document1 = new DOMDocument();
+        $document2 = new DOMDocument();
+
+        $document1->loadXML($element1->asXML());
+        $document2->loadXML($element2->asXML());
+
+        $path = new DOMXPath($document2);
+        $query = $path->query('/*/*');
+        $nodesCount = $query->length;
+
+        if (0 == $nodesCount) {
+            return $element1;
+        }
+
+        for ($i = 0; $i < $nodesCount; ++$i) {
+            $node = $document1->importNode($query->item($i), true);
+            $document1->documentElement->appendChild($node);
+        }
+
+        return simplexml_import_dom($document1);
+    }
+}