Refacor electron app and add migrations

electron/cqrs/queries/handlers/getBansForRoom.ts

@@ -0,0 +1,16 @@
+import { DataSource } from 'typeorm';
+import { BanEntity } from '../../../entities';
+import { GetBansForRoomQuery } from '../../types';
+import { rowToBan } from '../../mappers';
+
+export async function handleGetBansForRoom(query: GetBansForRoomQuery, dataSource: DataSource) {
+  const repo = dataSource.getRepository(BanEntity);
+  const now = Date.now();
+  const rows = await repo
+    .createQueryBuilder('ban')
+    .where('ban.roomId = :roomId', { roomId: query.payload.roomId })
+    .andWhere('(ban.expiresAt IS NULL OR ban.expiresAt > :now)', { now })
+    .getMany();
+
+  return rows.map(rowToBan);
+}