Rework libraries handling so that libraries don't have to be ported to contao 4.4 only yet.

src/Frontend/Assets/LibrariesConfiguration.php

@@ -0,0 +1,95 @@
+<?php
+
+/**
+ * Leaflet maps for Contao CMS.
+ *
+ * @package    contao-leaflet-maps
+ * @author     David Molineus <david.molineus@netzmacht.de>
+ * @copyright  2016-2017 netzmacht David Molineus. All rights reserved.
+ * @license    LGPL-3.0 https://github.com/netzmacht/contao-leaflet-maps/blob/master/LICENSE
+ * @filesource
+ */
+
+declare(strict_types=1);
+
+namespace Netzmacht\Contao\Leaflet\Frontend\Assets;
+
+use Contao\CoreBundle\Framework\ContaoFrameworkInterface as ContaoFramework;
+use Traversable;
+
+/**
+ * Class LibrariesConfiguration
+ *
+ * @package Netzmacht\Contao\Leaflet\Frontend\Assets
+ */
+class LibrariesConfiguration implements \IteratorAggregate, \ArrayAccess
+{
+    /**
+     * @var ContaoFramework
+     */
+    private $framework;
+
+    /**
+     * LibrariesConfiguration constructor.
+     *
+     * @param ContaoFramework $framework
+     */
+    public function __construct(ContaoFramework $framework)
+    {
+        $this->framework = $framework;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @SuppressWarnings(PHPMD.Superglobals)
+     */
+    public function getIterator()
+    {
+        $this->framework->initialize();
+
+        return new \ArrayIterator($GLOBALS['LEAFLET_LIBRARIES']);
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @SuppressWarnings(PHPMD.Superglobals)
+     */
+    public function offsetExists($offset)
+    {
+        $this->framework->initialize();
+
+        return isset($GLOBALS['LEAFLET_LIBRARIES'][$offset]);
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @SuppressWarnings(PHPMD.Superglobals)
+     */
+    public function offsetGet($offset)
+    {
+        return $GLOBALS['LEAFLET_LIBRARIES'][$offset];
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @SuppressWarnings(PHPMD.Superglobals)
+     */
+    public function offsetSet($offset, $value)
+    {
+        $GLOBALS['LEAFLET_LIBRARIES'][$offset] = $value;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @SuppressWarnings(PHPMD.Superglobals)
+     */
+    public function offsetUnset($offset)
+    {
+        unset($GLOBALS['LEAFLET_LIBRARIES'][$offset]);
+    }
+}