Implement assets loading.

src/Listener/LoadAssetsListener.php

@@ -0,0 +1,135 @@
+<?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\Listener;
+
+use Netzmacht\Contao\Leaflet\ContaoAssets;
+use Netzmacht\Contao\Leaflet\Mapper\DefinitionMapper;
+use Netzmacht\Contao\Leaflet\Model\IconModel;
+use Netzmacht\LeafletPHP\Assets;
+use Netzmacht\LeafletPHP\Definition\Type\Icon;
+use Netzmacht\LeafletPHP\Definition\Type\ImageIcon;
+
+/**
+ * Class LoadAssetsListener.
+ *
+ * @package Netzmacht\Contao\Leaflet\Listener
+ */
+class LoadAssetsListener
+{
+    /**
+     * Assets.
+     *
+     * @var Assets
+     */
+    private $assets;
+
+    /**
+     * Definition mapper.
+     *
+     * @var DefinitionMapper
+     */
+    private $definitionMapper;
+
+    /**
+     * Libraries.
+     *
+     * @var array
+     */
+    private $libraries;
+
+    /**
+     * LoadAssetsListener constructor.
+     *
+     * @param Assets           $assets           Assets.
+     * @param DefinitionMapper $definitionMapper Definition mapper.
+     * @param array            $libraries        Libraries.
+     */
+    public function __construct(Assets $assets, DefinitionMapper $definitionMapper, array $libraries)
+    {
+        $this->assets           = $assets;
+        $this->definitionMapper = $definitionMapper;
+    }
+
+    /**
+     * Handle the get javascript event.
+     *
+     * @return void
+     */
+    public function onGetJavascriptEvent(): void
+    {
+        $this->assets->addJavascript('assets/leaflet/maps/contao-leaflet.js', ContaoAssets::TYPE_FILE);
+
+        $collection = IconModel::findBy('active', true);
+
+        if ($collection) {
+            $buffer = '';
+            $icons  = [];
+
+            foreach ($collection as $model) {
+                /** @var ImageIcon $icon */
+                $icon    = $this->definitionMapper->handle($model);
+                $icons[] = [
+                    'id'      => $icon->getId(),
+                    'type'    => lcfirst($icon->getType()),
+                    'options' => $icon->getOptions(),
+                ];
+
+                $this->loadIconsLibraries($icon);
+            }
+
+            if ($icons) {
+                $buffer = sprintf('L.contao.loadIcons(%s);', json_encode($icons));
+            }
+
+            // @codingStandardsIgnoreStart
+            // TODO: Cache it.
+            // codingStandardsIgnoreEnd
+
+            $file = new \File('assets/leaflet/js/icons.js');
+            $file->write($buffer);
+            $file->close();
+
+            $this->assets->addJavascript('assets/leaflet/js/icons.js', ContaoAssets::TYPE_FILE);
+        }
+    }
+
+    /**
+     * Load all libraries for an icon.
+     *
+     * @param Icon $icon Icon definition.
+     *
+     * @return void
+     */
+    protected function loadIconsLibraries($icon): void
+    {
+        foreach ($icon::getRequiredLibraries() as $library) {
+            if (!isset($this->libraries[$library])) {
+                continue;
+            }
+
+            $assets = $this->libraries[$library];
+
+            if (!empty($assets['css'])) {
+                list ($source, $type) = (array)$assets['css'];
+                $this->assets->addStylesheet($source, $type ?: Assets::TYPE_FILE);
+            }
+
+            if (!empty($assets['javascript'])) {
+                list ($source, $type) = (array)$assets['javascript'];
+                $this->assets->addJavascript($source, $type ?: Assets::TYPE_FILE);
+            }
+        }
+    }
+}

src/Resources/config/config.yml

@@ -58,3 +58,6 @@ parameters:
       - 'id'
       - 'title'
       - 'alias'
+
+  # Leaflet libraries files
+  netzmacht.contao_leaflet_maps.libraries: []

src/Resources/config/listeners.yml

@@ -54,3 +54,12 @@ services:
       - '%netzmacht.contao_leaflet_maps.feature_model_properties%'
     tags:
       - { name: 'kernel.event_subscriber' }
+
+  netzmacht.contao_leaflet_maps.listeners.load_assets:
+    class: Netzmacht\Contao\Leaflet\Listener\LoadAssetsListener
+    arguments:
+      - '@netzmacht.contao_leaflet_maps.map.assets'
+      - '@netzmacht.contao_leaflet_maps.definition.mapper'
+      - '%netzmacht.contao_leaflet_maps.libraries%'
+    tags:
+      - { name: 'kernel.event_listener', event: 'netzmacht.contao_leaflet.get_javascript' }