Typescript migration

* db/database.js
* utils/databaseUtil.js

server/utils/databaseUtil.ts

@@ -0,0 +1,8 @@
+import _ from "lodash";
+
+export function inCondition<T>(field: string, list: T[]): {query: string, params: T[]} {
+    return {
+        query: '(' + field + ' IN (' + _.join(_.times(list.length, _.constant('?')), ', ') + '))',
+        params: list,
+    }
+}