вложения, канальчики, бим-бим + бам-бам

server/plugins/event-bus.ts

@@ -0,0 +1,27 @@
+import type { FastifyPluginAsync } from 'fastify'
+import type { Type } from 'typebox'
+import type { UserSchema } from '../schemas/auth.ts'
+import type { ChatMessageSchema } from '../schemas/chat.ts'
+import { EventEmitter } from 'node:events'
+import fp from 'fastify-plugin'
+
+declare module 'fastify' {
+  interface FastifyInstance {
+    bus: EventEmitter
+  }
+}
+
+interface EventMap {
+  'chat:new-message': [Type.Static<typeof ChatMessageSchema>]
+  'user:profile-updated': [Type.Static<typeof UserSchema>]
+}
+
+const plugin: FastifyPluginAsync = fp(async (fastify) => {
+  const bus = new EventEmitter<EventMap>()
+
+  fastify.decorate('bus', bus)
+}, {
+  name: 'event-bus',
+})
+
+export default plugin