Store layer relations in extra table.

src/Netzmacht/Contao/Leaflet/Dca/Control.php

@@ -13,11 +13,24 @@ namespace Netzmacht\Contao\Leaflet\Dca;
 
 
 use Netzmacht\Contao\DevTools\Dca\Options\OptionsBuilder;
+use Netzmacht\Contao\DevTools\ServiceContainerTrait;
 use Netzmacht\Contao\Leaflet\Model\ControlModel;
 use Netzmacht\Contao\Leaflet\Model\LayerModel;
 
 class Control
 {
+    use ServiceContainerTrait;
+
+    /**
+     * @var \Database
+     */
+    private $database;
+
+    public function __construct()
+    {
+        $this->database = static::getService('database.connection');
+    }
+
     public function generateRow($row)
     {
         return sprintf(
@@ -47,4 +60,74 @@ class Control
 
         return OptionsBuilder::fromCollection($collection, 'id', 'title')->getOptions();
     }
+
+    public function loadLayerRelations($value, $dataContainer)
+    {
+        $result = $this->database
+            ->prepare('SELECT lid As layer, mode FROM tl_leaflet_control_layer WHERE cid=? ORDER BY sorting')
+            ->execute($dataContainer->id);
+
+        return $result->fetchAllAssoc();
+    }
+
+    public function saveLayerRelations($layers, $dataContainer)
+    {
+        $new    = deserialize($layers, true);
+        $values = array();
+        $result = $this->database
+            ->prepare('SELECT * FROM tl_leaflet_control_layer WHERE cid=? order BY sorting')
+            ->execute($dataContainer->id);
+
+        while ($result->next()) {
+            $values[$result->lid] = $result->row();
+        }
+
+        $sorting = 0;
+
+        foreach ($new as $layer) {
+            if (!isset($values[$layer['layer']]) || $values[$layer['layer']]['mode'] != $layer['mode']) {
+                $this->database
+                    ->prepare('INSERT INTO tl_leaflet_control_layer %s')
+                    ->set(
+                        array(
+                            'tstamp'  => time(),
+                            'lid'     => $layer['layer'],
+                            'cid'     => $dataContainer->id,
+                            'mode'    => $layer['mode'],
+                            'sorting' => $sorting
+                        )
+                    )
+                    ->execute();
+
+                $sorting += 128;
+            } else {
+                $this->database
+                    ->prepare('UPDATE tl_leaflet_control_layer %s WHERE id=?')
+                    ->set(
+                        array(
+                            'tstamp'  => time(),
+                            'sorting' => $sorting,
+                            'mode'    => $layer['mode']
+                        )
+                    )
+                    ->execute($values[$layer['layer']]['id']);
+
+                $sorting += 128;
+                unset ($values[$layer['layer']]);
+            }
+        }
+
+        $ids = array_map(
+            function ($item) {
+                return $item['id'];
+            },
+            $values
+        );
+
+        if ($ids) {
+            $this->database->query('DELETE FROM tl_leaflet_control_layer WHERE id IN(' . implode(',', $ids) . ')');
+        }
+
+        return null;
+    }
 }