[DATABASE][CONFIG] Bring default configs from V2 and implement DATABASE wrapper

src/Core/DB.php

@@ -0,0 +1,47 @@
+<?php
+
+/*
+ * This file is part of GNU social - https://www.gnu.org/software/social
+ *
+ * GNU social is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GNU social is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Doctrine entity manager static wrapper
+ *
+ * @package GNUsocial
+ * @category DB
+ *
+ * @author    Hugo Sales <hugo@fc.up.pt>
+ * @copyright 2020 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+
+namespace App\Core;
+
+use Doctrine\ORM\EntityManager;
+
+abstract class DB
+{
+    private static ?EntityManager $em;
+    public static function setEntityManager($m): void
+    {
+        self::$em = $m;
+    }
+
+    public static function __call($method, array $args = [])
+    {
+        $em->{$method}(...$args);
+    }
+}