user/src/modules/users/adapters/primaries/users.controller.ts

import { Mapper } from '@automapper/core';
import { InjectMapper } from '@automapper/nestjs';
import { Controller, UsePipes } from '@nestjs/common';
import { CommandBus, QueryBus } from '@nestjs/cqrs';
import { GrpcMethod, RpcException } from '@nestjs/microservices';
import { DatabaseException } from '../../../database/src/exceptions/database.exception';
import { CreateUserCommand } from '../../commands/create-user.command';
import { DeleteUserCommand } from '../../commands/delete-user.command';
import { UpdateUserCommand } from '../../commands/update-user.command';
import { CreateUserRequest } from '../../domain/dtos/create-user.request';
import { FindAllUsersRequest } from '../../domain/dtos/find-all-users.request';
import { FindUserByUuidRequest } from '../../domain/dtos/find-user-by-uuid.request';
import { UpdateUserRequest } from '../../domain/dtos/update-user.request';
import { User } from '../../domain/entities/user';
import { FindAllUsersQuery } from '../../queries/find-all-users.query';
import { FindUserByUuidQuery } from '../../queries/find-user-by-uuid.query';
import { UserPresenter } from './user.presenter';
import { ICollection } from '../../../database/src/interfaces/collection.interface';
import { RpcValidationPipe } from './rpc.validation-pipe';

@UsePipes(
  new RpcValidationPipe({
    whitelist: true,
    forbidUnknownValues: false,
  }),
)
@Controller()
export class UsersController {
  constructor(
    private readonly _commandBus: CommandBus,
    private readonly _queryBus: QueryBus,
    @InjectMapper() private readonly _mapper: Mapper,
  ) {}

  @GrpcMethod('UsersService', 'FindAll')
  async findAll(data: FindAllUsersRequest): Promise<ICollection<User>> {
    const userCollection = await this._queryBus.execute(
      new FindAllUsersQuery(data),
    );
    return Promise.resolve({
      data: userCollection.data.map((user: User) =>
        this._mapper.map(user, User, UserPresenter),
      ),
      total: userCollection.total,
    });
  }

  @GrpcMethod('UsersService', 'FindOneByUuid')
  async findOneByUuid(data: FindUserByUuidRequest): Promise<UserPresenter> {
    try {
      const user = await this._queryBus.execute(new FindUserByUuidQuery(data));
      return this._mapper.map(user, User, UserPresenter);
    } catch (error) {
      throw new RpcException({
        code: 5,
        message: 'User not found',
      });
    }
  }

  @GrpcMethod('UsersService', 'Create')
  async createUser(data: CreateUserRequest): Promise<UserPresenter> {
    try {
      const user = await this._commandBus.execute(new CreateUserCommand(data));
      return this._mapper.map(user, User, UserPresenter);
    } catch (e) {
      if (e instanceof DatabaseException) {
        if (e.message.includes('Already exists')) {
          throw new RpcException({
            code: 6,
            message: 'User already exists',
          });
        }
      }
      throw new RpcException({});
    }
  }

  @GrpcMethod('UsersService', 'Update')
  async updateUser(data: UpdateUserRequest): Promise<UserPresenter> {
    try {
      const user = await this._commandBus.execute(new UpdateUserCommand(data));

      return this._mapper.map(user, User, UserPresenter);
    } catch (e) {
      if (e instanceof DatabaseException) {
        if (e.message.includes('not found')) {
          throw new RpcException({
            code: 5,
            message: 'User not found',
          });
        }
      }
      throw new RpcException({});
    }
  }

  @GrpcMethod('UsersService', 'Delete')
  async deleteUser(data: FindUserByUuidRequest): Promise<void> {
    try {
      await this._commandBus.execute(new DeleteUserCommand(data.uuid));

      return Promise.resolve();
    } catch (e) {
      if (e instanceof DatabaseException) {
        if (e.message.includes('not found')) {
          throw new RpcException({
            code: 5,
            message: 'User not found',
          });
        }
      }
      throw new RpcException({});
    }
  }
}