refactor modules

src/app.module.ts

@@ -53,7 +53,5 @@ import { HealthModule } from '@modules/health/health.module';
     HealthModule,
     AdModule,
   ],
-  controllers: [],
-  providers: [],
 })
 export class AppModule {}

src/modules/ad/ad.module.ts

@@ -1,4 +1,4 @@
-import { Module } from '@nestjs/common';
+import { Module, Provider } from '@nestjs/common';
 import { CreateAdGrpcController } from './interface/grpc-controllers/create-ad.grpc.controller';
 import { CqrsModule } from '@nestjs/cqrs';
 import {
@@ -25,40 +25,66 @@ import { FindAdByIdQueryHandler } from './core/queries/find-ad-by-id/find-ad-by-
 import { PublishMessageWhenAdIsCreatedDomainEventHandler } from './core/event-handlers/publish-message-when-ad-is-created.domain-event-handler';
 import { PublishLogMessageWhenAdIsCreatedDomainEventHandler } from './core/event-handlers/publish-log-message-when-ad-is-created.domain-event-handler';
 
+const grpcControllers = [CreateAdGrpcController, FindAdByIdGrpcController];
+
+const eventHandlers: Provider[] = [
+  PublishMessageWhenAdIsCreatedDomainEventHandler,
+  PublishLogMessageWhenAdIsCreatedDomainEventHandler,
+];
+
+const commandHandlers: Provider[] = [CreateAdService];
+
+const queryHandlers: Provider[] = [FindAdByIdQueryHandler];
+
+const mappers: Provider[] = [AdMapper];
+
+const repositories: Provider[] = [
+  {
+    provide: AD_REPOSITORY,
+    useClass: AdRepository,
+  },
+];
+
+const messageBrokers: Provider[] = [
+  {
+    provide: MESSAGE_BROKER_PUBLISHER,
+    useClass: MessageBrokerPublisher,
+  },
+  {
+    provide: MESSAGE_PUBLISHER,
+    useClass: MessagePublisher,
+  },
+];
+
+const orms: Provider[] = [PrismaService];
+
+const utilities: Provider[] = [
+  {
+    provide: PARAMS_PROVIDER,
+    useClass: DefaultParamsProvider,
+  },
+  {
+    provide: TIMEZONE_FINDER,
+    useClass: TimezoneFinder,
+  },
+  {
+    provide: TIME_CONVERTER,
+    useClass: TimeConverter,
+  },
+];
+
 @Module({
   imports: [CqrsModule],
-  controllers: [CreateAdGrpcController, FindAdByIdGrpcController],
+  controllers: [...grpcControllers],
   providers: [
-    CreateAdService,
-    FindAdByIdQueryHandler,
-    PublishMessageWhenAdIsCreatedDomainEventHandler,
-    PublishLogMessageWhenAdIsCreatedDomainEventHandler,
-    PrismaService,
-    AdMapper,
-    {
-      provide: AD_REPOSITORY,
-      useClass: AdRepository,
-    },
-    {
-      provide: PARAMS_PROVIDER,
-      useClass: DefaultParamsProvider,
-    },
-    {
-      provide: MESSAGE_BROKER_PUBLISHER,
-      useClass: MessageBrokerPublisher,
-    },
-    {
-      provide: MESSAGE_PUBLISHER,
-      useClass: MessagePublisher,
-    },
-    {
-      provide: TIMEZONE_FINDER,
-      useClass: TimezoneFinder,
-    },
-    {
-      provide: TIME_CONVERTER,
-      useClass: TimeConverter,
-    },
+    ...eventHandlers,
+    ...commandHandlers,
+    ...queryHandlers,
+    ...mappers,
+    ...repositories,
+    ...messageBrokers,
+    ...orms,
+    ...utilities,
   ],
   exports: [
     PrismaService,

src/modules/health/health.module.ts

@@ -1,4 +1,4 @@
-import { Module } from '@nestjs/common';
+import { Module, Provider } from '@nestjs/common';
 import { HealthHttpController } from './interface/http-controllers/health.http.controller';
 import { TerminusModule } from '@nestjs/terminus';
 import { MESSAGE_BROKER_PUBLISHER, MESSAGE_PUBLISHER } from 'src/app.constants';
@@ -10,23 +10,33 @@ import { AD_REPOSITORY } from './health.di-tokens';
 import { HealthGrpcController } from './interface/grpc-controllers/health.grpc.controller';
 import { AdModule } from '@modules/ad/ad.module';
 
+const grpcControllers = [HealthGrpcController];
+
+const httpControllers = [HealthHttpController];
+
+const useCases: Provider[] = [RepositoriesHealthIndicatorUseCase];
+
+const repositories: Provider[] = [
+  {
+    provide: AD_REPOSITORY,
+    useClass: AdRepository,
+  },
+];
+
+const messageBrokers: Provider[] = [
+  {
+    provide: MESSAGE_BROKER_PUBLISHER,
+    useClass: MessageBrokerPublisher,
+  },
+  {
+    provide: MESSAGE_PUBLISHER,
+    useClass: MessagePublisher,
+  },
+];
+
 @Module({
   imports: [TerminusModule, AdModule],
-  controllers: [HealthGrpcController, HealthHttpController],
-  providers: [
-    RepositoriesHealthIndicatorUseCase,
-    {
-      provide: AD_REPOSITORY,
-      useClass: AdRepository,
-    },
-    {
-      provide: MESSAGE_BROKER_PUBLISHER,
-      useClass: MessageBrokerPublisher,
-    },
-    {
-      provide: MESSAGE_PUBLISHER,
-      useClass: MessagePublisher,
-    },
-  ],
+  controllers: [...grpcControllers, ...httpControllers],
+  providers: [...useCases, ...repositories, ...messageBrokers],
 })
 export class HealthModule {}