Switch to PSR-4.

src/Mapper/Layer/ReferenceLayerMapper.php

@@ -0,0 +1,53 @@
+<?php
+
+/**
+ * @package    contao-leaflet-maps
+ * @author     David Molineus <david.molineus@netzmacht.de>
+ * @copyright  2014-2016 netzmacht David Molineus
+ * @license    LGPL 3.0
+ * @filesource
+ *
+ */
+
+namespace Netzmacht\Contao\Leaflet\Mapper\Layer;
+
+use Netzmacht\Contao\Leaflet\Filter\Filter;
+use Netzmacht\Contao\Leaflet\Mapper\DefinitionMapper;
+use Netzmacht\Contao\Leaflet\Model\LayerModel;
+use Netzmacht\LeafletPHP\Definition;
+
+/**
+ * Class ReferenceLayerMapper maps an reference layer to another layer.
+ *
+ * @package Netzmacht\Contao\Leaflet\Mapper\Layer
+ */
+class ReferenceLayerMapper extends AbstractLayerMapper
+{
+    /**
+     * Layer type.
+     *
+     * @var string
+     */
+    protected static $type = 'reference';
+
+    /**
+     * {@inheritdoc}
+     */
+    public function handle(
+        $model,
+        DefinitionMapper $mapper,
+        Filter $filter = null,
+        $elementId = null,
+        Definition $parent = null
+    ) {
+        $reference = LayerModel::findByPk($model->reference);
+
+        if (!$reference || !$reference->active) {
+            return null;
+        }
+
+        $elementId = $model->standalone ? $this->getElementId($model, $elementId) : null;
+
+        return $mapper->handle($reference, $filter, $elementId);
+    }
+}