update table listing and add callbacks

lib/Froxlor/UI/Listing.php

@@ -18,6 +18,37 @@ namespace Froxlor\UI;
  */
 class Listing
 {
+    public static function format(Collection $collection, array $tabellisting): array
+    {
+        $items = $collection->getData()['list'];
+        $table = [];
+
+        foreach ($tabellisting['visible_columns'] as $visible_column) {
+            $table['th'][] = $tabellisting['columns'][$visible_column]['label'];
+        }
+
+        foreach ($items as $key => $item) {
+            foreach ($tabellisting['visible_columns'] as $visible_column) {
+                $format_callback = $tabellisting['columns'][$visible_column]['format_callback'] ?? null;
+                $column = $tabellisting['columns'][$visible_column]['column'];
+                $data = self::getMultiArrayFromString($item, $column);
+
+                // TODO: contextual_class ...
+
+                if ($format_callback) {
+                    $table['tr'][$key][] = call_user_func($format_callback, $data, $item);
+                } else {
+                    $table['tr'][$key][] = $data;
+                }
+            }
+        }
+
+        return [
+            'table' => $table,
+            'pagination' => null, // TODO: write some logic
+        ];
+    }
+
     public static function getVisibleColumnsForListing($listing, $default_columns)
     {
         // Hier käme dann die Logik, die das aus der DB zieht ...
@@ -26,4 +57,16 @@ class Listing
 
         return $default_columns;
     }
+
+    public static function getMultiArrayFromString($arr, $str)
+    {
+        foreach (explode('.', $str) as $key) {
+            if (!array_key_exists($key, $arr)) {
+                return null;
+            }
+            $arr = $arr[$key];
+        }
+
+        return $arr;
+    }
 }