delete username usecase

src/modules/authentication/interface/grpc-controllers/delete-username.grpc.controller.ts

@@ -0,0 +1,45 @@
+import {
+  DatabaseErrorException,
+  NotFoundException,
+  RpcExceptionCode,
+  RpcValidationPipe,
+} from '@mobicoop/ddd-library';
+import { Controller, UsePipes } from '@nestjs/common';
+import { CommandBus } from '@nestjs/cqrs';
+import { GrpcMethod, RpcException } from '@nestjs/microservices';
+import { DeleteUsernameRequestDto } from './dtos/delete-username.request.dto';
+import { DeleteUsernameCommand } from '@modules/authentication/core/application/commands/delete-username/delete-username.command';
+
+@UsePipes(
+  new RpcValidationPipe({
+    whitelist: true,
+    forbidUnknownValues: false,
+  }),
+)
+@Controller()
+export class DeleteUsernameGrpcController {
+  constructor(private readonly commandBus: CommandBus) {}
+
+  @GrpcMethod('AuthenticationService', 'DeleteUsername')
+  async delete(data: DeleteUsernameRequestDto): Promise<void> {
+    try {
+      await this.commandBus.execute(new DeleteUsernameCommand(data));
+    } catch (error: any) {
+      if (error instanceof NotFoundException)
+        throw new RpcException({
+          code: RpcExceptionCode.NOT_FOUND,
+          message: error.message,
+        });
+
+      if (error instanceof DatabaseErrorException)
+        throw new RpcException({
+          code: RpcExceptionCode.INTERNAL,
+          message: error.message,
+        });
+      throw new RpcException({
+        code: RpcExceptionCode.UNKNOWN,
+        message: error.message,
+      });
+    }
+  }
+}

src/modules/authentication/interface/grpc-controllers/dtos/delete-username.request.dto.ts

@@ -0,0 +1,7 @@
+import { IsNotEmpty, IsString } from 'class-validator';
+
+export class DeleteUsernameRequestDto {
+  @IsString()
+  @IsNotEmpty()
+  name: string;
+}