[CORE][DB] Add DB::refetch, which refetches an entity from the database, so it's managed and definitely up to date (use when wanting to update entities from cache)

src/Core/DB.php

@@ -36,6 +36,7 @@ namespace App\Core;
 
 use App\Util\Exception\DuplicateFoundException;
 use App\Util\Exception\NotFoundException;
+use App\Util\Formatting;
 use Closure;
 use Doctrine\Common\Collections\Criteria;
 use Doctrine\Common\Collections\ExpressionBuilder;
@@ -109,7 +110,7 @@ class DB
         return array_search($class, self::$table_map);
     }
 
-    public static function getPKForClass(string $class)
+    public static function getPKForClass(string $class): array
     {
         return self::$class_pk[$class];
     }
@@ -320,6 +321,17 @@ class DB
         return $id;
     }
 
+    public static function refetch(Entity $ent): ?Entity
+    {
+        $pks      = self::getPKForClass($ent::class);
+        $criteria = [];
+        foreach ($pks as $pk) {
+            $method        = Formatting::snakeCaseToCamelCase("get_{$pk}");
+            $criteria[$pk] = $ent->{$method}();
+        }
+        return self::findOneBy($ent::class, $criteria);
+    }
+
     /**
      * Intercept static function calls to allow referring to entities
      * without writing the namespace (which is deduced from the call