feat: refactoring of xml parsers

src/BusProNet/XmlParser/AbstractParser.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\BusProNet\XmlParser;
+
+use App\BusProNet\TypeConversionTrait;
+use Symfony\Component\DomCrawler\Crawler;
+
+abstract class AbstractParser
+{
+    use TypeConversionTrait;
+
+    protected function getStringOrNullValue(Crawler $node): ?string
+    {
+        return 0 < $node->count() ? $node->text() : null;
+    }
+
+    protected function getIntOrNullValue(Crawler $node): ?int
+    {
+        return 0 < $node->count() ? (int) $node->text() : null;
+    }
+}