feat(server): use nestjs events to validate config (#7986)

* use events for config validation

* chore: better types

* add unit tests

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

server/src/infra/infra.module.ts

@@ -31,6 +31,7 @@ import {
 import { BullModule } from '@nestjs/bullmq';
 import { Global, Module, Provider } from '@nestjs/common';
 import { ConfigModule } from '@nestjs/config';
+import { EventEmitterModule } from '@nestjs/event-emitter';
 import { ScheduleModule, SchedulerRegistry } from '@nestjs/schedule';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { OpenTelemetryModule } from 'nestjs-otel';
@@ -103,6 +104,7 @@ const providers: Provider[] = [
 @Module({
   imports: [
     ConfigModule.forRoot(immichAppConfig),
+    EventEmitterModule.forRoot(),
     TypeOrmModule.forRoot(databaseConfig),
     TypeOrmModule.forFeature(databaseEntities),
     ScheduleModule,
@@ -119,6 +121,7 @@ export class InfraModule {}
 @Module({
   imports: [
     ConfigModule.forRoot(immichAppConfig),
+    EventEmitterModule.forRoot(),
     TypeOrmModule.forRoot(databaseConfig),
     TypeOrmModule.forFeature(databaseEntities),
     ScheduleModule,

server/src/infra/repositories/communication.repository.ts

@@ -2,11 +2,13 @@ import {
   AuthService,
   ClientEvent,
   ICommunicationRepository,
+  InternalEventMap,
   OnConnectCallback,
   OnServerEventCallback,
   ServerEvent,
 } from '@app/domain';
 import { ImmichLogger } from '@app/infra/logger';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import {
   OnGatewayConnection,
   OnGatewayDisconnect,
@@ -35,7 +37,10 @@ export class CommunicationRepository
   @WebSocketServer()
   private server?: Server;
 
-  constructor(private authService: AuthService) {}
+  constructor(
+    private authService: AuthService,
+    private eventEmitter: EventEmitter2,
+  ) {}
 
   afterInit(server: Server) {
     this.logger.log('Initialized websocket server');
@@ -97,4 +102,12 @@ export class CommunicationRepository
     this.logger.debug(`Server event: ${event} (send)`);
     this.server?.serverSideEmit(event);
   }
+
+  emit<E extends keyof InternalEventMap>(event: E, data: InternalEventMap[E]): boolean {
+    return this.eventEmitter.emit(event, data);
+  }
+
+  emitAsync<E extends keyof InternalEventMap, R = any[]>(event: E, data: InternalEventMap[E]): Promise<R> {
+    return this.eventEmitter.emitAsync(event, data) as Promise<R>;
+  }
 }