New project structure init

backend/app/plugins/wiaas/includes/class-wiaas-db-update.php

@@ -0,0 +1,27 @@
+<?php
+
+defined( 'ABSPATH' ) || exit;
+
+class Wiaas_DB_Update {
+
+	private static $db_updates = array(
+		'20180728222206' => 'wiaas_db_update_enable_product_by_user_role'
+	);
+
+	public static function get_pending_db_updates() {
+		$active_db_version = get_option( 'wiaas_db_version', '0' );
+		$pending_db_updates = array();
+		foreach (self::$db_updates as $version => $update_callback) {
+			if ($active_db_version < $version) {
+				$pending_db_updates[] = $update_callback;
+			}
+		}
+		return $pending_db_updates;
+	}
+
+	public static function execute_update($update_callback) {
+		call_user_func($update_callback);
+		$version = array_search($update_callback, self::$db_updates);
+		update_option('wiaas_db_version', $version);
+	}
+}