feat: Add notifications

electron/cqrs/queries/handlers/getMessagesSince.ts

@@ -0,0 +1,18 @@
+import { DataSource, MoreThan } from 'typeorm';
+import { MessageEntity } from '../../../entities';
+import { GetMessagesSinceQuery } from '../../types';
+import { rowToMessage } from '../../mappers';
+
+export async function handleGetMessagesSince(query: GetMessagesSinceQuery, dataSource: DataSource) {
+  const repo = dataSource.getRepository(MessageEntity);
+  const { roomId, sinceTimestamp } = query.payload;
+  const rows = await repo.find({
+    where: {
+      roomId,
+      timestamp: MoreThan(sinceTimestamp)
+    },
+    order: { timestamp: 'ASC' }
+  });
+
+  return rows.map(rowToMessage);
+}

electron/cqrs/queries/index.ts

@@ -4,6 +4,7 @@ import {
   QueryTypeKey,
   Query,
   GetMessagesQuery,
+  GetMessagesSinceQuery,
   GetMessageByIdQuery,
   GetReactionsForMessageQuery,
   GetUserQuery,
@@ -13,6 +14,7 @@ import {
   GetAttachmentsForMessageQuery
 } from '../types';
 import { handleGetMessages } from './handlers/getMessages';
+import { handleGetMessagesSince } from './handlers/getMessagesSince';
 import { handleGetMessageById } from './handlers/getMessageById';
 import { handleGetReactionsForMessage } from './handlers/getReactionsForMessage';
 import { handleGetUser } from './handlers/getUser';
@@ -27,6 +29,7 @@ import { handleGetAllAttachments } from './handlers/getAllAttachments';
 
 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.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

@@ -22,6 +22,7 @@ export type CommandTypeKey = typeof CommandType[keyof typeof CommandType];
 
 export const QueryType = {
   GetMessages: 'get-messages',
+  GetMessagesSince: 'get-messages-since',
   GetMessageById: 'get-message-by-id',
   GetReactionsForMessage: 'get-reactions-for-message',
   GetUser: 'get-user',
@@ -160,6 +161,7 @@ export type Command =
   | ClearAllDataCommand;
 
 export interface GetMessagesQuery { type: typeof QueryType.GetMessages; payload: { roomId: string; limit?: number; offset?: number } }
+export interface GetMessagesSinceQuery { type: typeof QueryType.GetMessagesSince; payload: { roomId: string; sinceTimestamp: number } }
 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 } }
@@ -174,6 +176,7 @@ export interface GetAllAttachmentsQuery { type: typeof QueryType.GetAllAttachmen
 
 export type Query =
   | GetMessagesQuery
+  | GetMessagesSinceQuery
   | GetMessageByIdQuery
   | GetReactionsForMessageQuery
   | GetUserQuery