wip: optimizations

electron/cqrs/queries/handlers/getRoomMessageStats.ts

@@ -0,0 +1,27 @@
+import { DataSource } from 'typeorm';
+import { MessageEntity } from '../../../entities';
+import { GetRoomMessageStatsQuery } from '../../types';
+import { getCurrentUserScope } from '../../current-user-scope';
+
+export async function handleGetRoomMessageStats(query: GetRoomMessageStatsQuery, dataSource: DataSource) {
+  const repo = dataSource.getRepository(MessageEntity);
+  const { roomId } = query.payload;
+  const currentUserId = await getCurrentUserScope(dataSource);
+
+  if (!currentUserId) {
+    return { count: 0,
+      lastUpdated: 0 };
+  }
+
+  const row = await repo.createQueryBuilder('message')
+    .select('COUNT(message.id)', 'count')
+    .addSelect('MAX(COALESCE(message.editedAt, message.timestamp, 0))', 'lastUpdated')
+    .where('message.roomId = :roomId', { roomId })
+    .andWhere('message.ownerUserId = :currentUserId', { currentUserId })
+    .getRawOne<{ count?: string | number | null; lastUpdated?: string | number | null }>();
+
+  return {
+    count: Number(row?.count ?? 0) || 0,
+    lastUpdated: Number(row?.lastUpdated ?? 0) || 0
+  };
+}