adding DataService class

services/PortableInfoboxDataService.class.php

@@ -0,0 +1,30 @@
+<?php
+
+class PortableInfoboxDataService {
+
+	const IMAGE_FIELD_TYPE = 'image';
+
+	public function getInfoboxDataByTitle( $title ) {
+		$data = [];
+		if ( $title && $title->exists() ) {
+			$data = Article::newFromTitle( $title, RequestContext::getMain() )
+				//on empty parser cache this should be regenerated, see WikiPage.php:2996
+				->getParserOutput()
+				->getProperty( PortableInfoboxParserTagController::INFOBOXES_PROPERTY_NAME );
+		}
+		return $data;
+	}
+
+	public function getImageListFromInfoboxData( $data ) {
+		$images = [];
+		foreach ( $data as $infobox ) {
+			foreach ( $infobox as $field ) {
+				if ( $field['type'] == self::IMAGE_FIELD_TYPE && isset( $field['data'] ) && !empty( $field['data']['key'] ) ) {
+					$images[ $field['data']['key'] ] = true;
+				}
+			}
+		}
+
+		return array_keys( $images );
+	}
+}