IM_NEW/User.WebApi/Applications/User/UserService.cs

using AutoMapper;
using IdentityService.Domain;
using IdentityService.Infrastructure;
using IdentityService.WebApi.Applications.Dtos.Common;
using IM.Commons;

namespace IdentityService.WebApi.Applications.User
{
    public class UserService
    {
        private readonly IIdRepository repository;
        private readonly IMapper mapper;
        private readonly UserDbContext userDb;

        public UserService(IIdRepository repository, IMapper mapper,
            UserDbContext userDbContext
            )
        {
            this.repository = repository;
            this.mapper = mapper;
            userDb = userDbContext;
        }

        public async Task<Result<UserResponse?>> GetUserInfoAsync(Guid userId)
        {
            var user = await repository.FindByIdAsync(userId);
            if (user is null)
            {
                return Result<UserResponse?>.Fail(ResultCode.USER_NOT_FOUND);
            }

            return Result<UserResponse?>.Success(mapper.Map<UserResponse>(user));
        }
        public async Task<Result<UserResponse?>> GetUserInfoByUnameAsync(string username)
        {
            var user = await repository.FindByUserNameAsync(username);
            if (user is null)
            {
                return Result<UserResponse?>.Fail(ResultCode.USER_NOT_FOUND);
            }

            return Result<UserResponse?>.Success(mapper.Map<UserResponse>(user));
        }

        public async Task<Result<UserResponse>> UpdateAsync(UserUpdateCommand command)
        {
            var user = await repository.FindByIdAsync(command.UserId);
            if (user is null)
            {
                return Result<UserResponse>.Fail(ResultCode.USER_NOT_FOUND);
            }
            user.Update(command.NickName, command.Region, command.Avatar, command.Description);

            return Result<UserResponse>.Success(mapper.Map<UserResponse>(user));
        }

        public async Task<Result<List<UserResponse>>> GetUsersByIdsAsync(IEnumerable<Guid> ids)
        {
            var specification = new UserResponseFindSpecification(ids, mapper);
            var users = await repository.GetUsersAsync(specification);
            return Result<List<UserResponse>>.Success([.. users]);
        }
    }
}