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
+  };
+}

electron/cqrs/queries/index.ts

@@ -5,6 +5,7 @@ import {
   Query,
   GetMessagesQuery,
   GetMessagesSinceQuery,
+  GetRoomMessageStatsQuery,
   GetMessageByIdQuery,
   GetReactionsForMessageQuery,
   GetUserQuery,
@@ -17,6 +18,7 @@ import {
 } from '../types';
 import { handleGetMessages } from './handlers/getMessages';
 import { handleGetMessagesSince } from './handlers/getMessagesSince';
+import { handleGetRoomMessageStats } from './handlers/getRoomMessageStats';
 import { handleGetMessageById } from './handlers/getMessageById';
 import { handleGetReactionsForMessage } from './handlers/getReactionsForMessage';
 import { handleGetUser } from './handlers/getUser';
@@ -35,6 +37,7 @@ import { handleGetMeta } from './handlers/getMeta';
 export const buildQueryHandlers = (dataSource: DataSource): Record<QueryTypeKey, (query: Query) => Promise<unknown>> => ({
   [QueryType.GetMessages]:              (query) => handleGetMessages(query as GetMessagesQuery, dataSource),
   [QueryType.GetMessagesSince]:         (query) => handleGetMessagesSince(query as GetMessagesSinceQuery, dataSource),
+  [QueryType.GetRoomMessageStats]:      (query) => handleGetRoomMessageStats(query as GetRoomMessageStatsQuery, dataSource),
   [QueryType.GetMessageById]:           (query) => handleGetMessageById(query as GetMessageByIdQuery, dataSource),
   [QueryType.GetReactionsForMessage]:   (query) => handleGetReactionsForMessage(query as GetReactionsForMessageQuery, dataSource),
   [QueryType.GetUser]:                  (query) => handleGetUser(query as GetUserQuery, dataSource),

electron/cqrs/types.ts

@@ -26,6 +26,7 @@ export type CommandTypeKey = typeof CommandType[keyof typeof CommandType];
 export const QueryType = {
   GetMessages: 'get-messages',
   GetMessagesSince: 'get-messages-since',
+  GetRoomMessageStats: 'get-room-message-stats',
   GetMessageById: 'get-message-by-id',
   GetReactionsForMessage: 'get-reactions-for-message',
   GetUser: 'get-user',
@@ -241,6 +242,7 @@ export interface GetMessagesQuery {
   };
 }
 export interface GetMessagesSinceQuery { type: typeof QueryType.GetMessagesSince; payload: { roomId: string; sinceTimestamp: number } }
+export interface GetRoomMessageStatsQuery { type: typeof QueryType.GetRoomMessageStats; payload: { roomId: string } }
 export interface GetMessageByIdQuery { type: typeof QueryType.GetMessageById; payload: { messageId: string } }
 export interface GetReactionsForMessageQuery { type: typeof QueryType.GetReactionsForMessage; payload: { messageId: string } }
 export interface GetUserQuery { type: typeof QueryType.GetUser; payload: { userId: string } }
@@ -259,6 +261,7 @@ export interface GetMetaQuery { type: typeof QueryType.GetMeta; payload: { key:
 export type Query =
   | GetMessagesQuery
   | GetMessagesSinceQuery
+  | GetRoomMessageStatsQuery
   | GetMessageByIdQuery
   | GetReactionsForMessageQuery
   | GetUserQuery