public Task <IdentityResult> CreateAsync(ChirpUser user, CancellationToken cancellationToken)
{
if (user == null)
{
throw new ArgumentNullException(nameof(user));
}
_db.Users.Add(user);
try
{
_db.SaveChanges();
}
catch (Exception e)
{
if (e.IsPrimaryOrUniqueKeyViolation())
{
return(Task.FromResult(IdentityResult.Failed(new IdentityError
{
Code = "err_username_taken", Description = $"Username {user.UsernameNormalized} is taken"
})
));
}
return(Task.FromResult(IdentityResult.Failed(new IdentityError
{
Code = "err_internal_error", Description = e.Message
})
));
}
return(Task.FromResult(IdentityResult.Success));
}
public override void Perform(long chirpId)
{
var chirp = _db.Chirps.Find(chirpId);
if (chirp == null)
{
throw new Exception($"Chirp {chirpId} doesn't exist");
}
var hashTags = HashTagRegex.Matches(chirp.Contents).Select(m => m.Value).ToList();
if (hashTags.Count == 0)
{
return;
}
if (_db.HashTags.Exists(hashTags[0].Substring(1), chirp.ChirpTimeUtc, chirp.Id))
{
return; // idempotent
}
foreach (var tag in hashTags)
{
_db.HashTags.Add(new HashTag
{
Tag = tag.Substring(1),
TimeUtc = chirp.ChirpTimeUtc,
ChirpId = chirp.Id
});
}
_db.SaveChanges();
}
public IActionResult Post(DtoUserRegister dto)
{
if (_db.Users.UserExists(dto.Username))
{
ModelState.AddModelError("Username", "This username is already taken");
}
if (dto.Password != dto.PasswordConfirm)
{
ModelState.AddModelError("PasswordConfirm", "The password and the confirmation password do not match");
}
if (!ModelState.IsValid)
{
return(BadRequest(ModelState));
}
var user = new ChirpUser
{
Username = dto.Username,
Password = _passwordHasher.HashPassword(dto.Password)
};
_db.Users.Add(user);
_db.SaveChanges();
return(Ok(user.Id));
}
public IActionResult Post(DtoChirpPost dto)
{
_db.BeginTransaction();
var chirp = new Chirp
{
UserId = int.Parse(User.Identity.Name ?? "1"),
ChirpTimeUtc = DateTime.UtcNow,
ChirpType = ChirpType.Chirp,
Contents = dto.Contents
};
_db.Chirps.Add(chirp);
_db.SaveChanges();
// Publish chirp processing job, before commit.
// If the publishing fails, the transaction will be rolled back.
//
// We're using the job publish as the last committing resource because
// it does not participate in the DB transaction.
JobBatch.Do(() =>
{
TimelineUpdate.Publish(new TimelineUpdateArgs
{
ChirpId = chirp.Id,
AuthorId = chirp.UserId,
TimeUtc = chirp.ChirpTimeUtc
});
HashTagUpdate.Publish(chirp.Id);
});
_db.CommitTransaction();
return(Ok(chirp.Id));
}