public async Task <SendMessagePayload> SendMessageAsync(
SendMessageInput input,
FieldNode field,
[GlobalState] string currentUserEmail,
PersonByEmailDataLoader personByEmail,
[Service] IMessageRepository messageRepository,
[Service] IEventDispatcher eventDispatcher,
CancellationToken cancellationToken)
{
IReadOnlyList <Person> participants =
await personByEmail.LoadAsync(
cancellationToken, currentUserEmail, input.RecipientEmail)
.ConfigureAwait(false);
if (participants[1] is null)
{
throw new QueryException(
ErrorBuilder.New()
.SetCode("UNKNOWN_RECIPIENT")
.SetMessage("The given recipient id is invalid.")
.AddLocation(field.Arguments[0])
.Build());
}
Person sender = participants[0];
Person recipient = participants[1];
var message = new Message(
sender.Id,
recipient.Id,
input.Text);
await messageRepository.AddMessageAsync(
message, cancellationToken)
.ConfigureAwait(false);
await eventDispatcher.SendAsync(
recipient.Email, message, cancellationToken)
.ConfigureAwait(false);
return(new SendMessagePayload(
sender,
recipient,
message,
input.ClientMutationId));
}
public async Task <SendMessagePayload> SendMessageAsync(
SendMessageInput input,
FieldNode field,
[GlobalState] string currentUserEmail,
PersonByEmailDataLoader personByEmail,
[Service] ChatDbContext dbContext,
[Service] ITopicEventSender eventSender,
CancellationToken cancellationToken)
{
IReadOnlyList <Person> participants =
await personByEmail.LoadAsync(
cancellationToken, currentUserEmail, input.RecipientEmail);
if (participants[1] is null)
{
throw new QueryException(
ErrorBuilder.New()
.SetCode("UNKNOWN_RECIPIENT")
.SetMessage("The given recipient id is invalid.")
.AddLocation(field.Arguments[0])
.Build());
}
Person sender = participants[0];
Person recipient = participants[1];
var message = new Message
{
SenderId = sender.Id,
RecipientId = recipient.Id,
Text = input.Text,
Sent = DateTime.UtcNow
};
dbContext.Messages.Add(message);
await dbContext.SaveChangesAsync(cancellationToken);
await eventSender.SendAsync(recipient.Email, message, cancellationToken);
return(new SendMessagePayload(
sender,
recipient,
message,
input.ClientMutationId));
}
public async Task <Direction> GetDirectionAsync(
[GlobalState] string currentUserEmail,
PersonByEmailDataLoader personByEmail,
[Parent] Message message,
CancellationToken cancellationToken)
{
Person sender = await personByEmail.LoadAsync(currentUserEmail, cancellationToken);
if (message.RecipientId == message.SenderId &&
message.SenderId == sender.Id)
{
return(Direction.Incoming);
}
if (message.SenderId == sender.Id)
{
return(Direction.Outgoing);
}
return(Direction.Incoming);
}
public async Task <LoginPayload> LoginAsync(
LoginInput input,
[Service] ChatDbContext dbContext,
[Service] PersonByEmailDataLoader personByEmail,
[Service] ITopicEventSender eventSender,
CancellationToken cancellationToken)
{
if (string.IsNullOrEmpty(input.Email))
{
throw new QueryException(
ErrorBuilder.New()
.SetMessage("The email mustn't be empty.")
.SetCode("EMAIL_EMPTY")
.Build());
}
if (string.IsNullOrEmpty(input.Password))
{
throw new QueryException(
ErrorBuilder.New()
.SetMessage("The password mustn't be empty.")
.SetCode("PASSWORD_EMPTY")
.Build());
}
User?user = await dbContext.Users.FirstOrDefaultAsync(t => t.Email == input.Email);
if (user is null)
{
throw new QueryException(
ErrorBuilder.New()
.SetMessage("The specified username or password are invalid.")
.SetCode("INVALID_CREDENTIALS")
.Build());
}
using var sha = SHA512.Create();
byte[] hash = sha.ComputeHash(Encoding.UTF8.GetBytes(input.Password + user.Salt));
if (!Convert.ToBase64String(hash).Equals(user.PasswordHash, StringComparison.Ordinal))
{
throw new QueryException(
ErrorBuilder.New()
.SetMessage("The specified username or password are invalid.")
.SetCode("INVALID_CREDENTIALS")
.Build());
}
Person me = await personByEmail.LoadAsync(input.Email, cancellationToken);
var identity = new ClaimsIdentity(new Claim[]
{
new Claim(ClaimTypes.Name, user.Email),
new Claim(ClaimTypes.Email, user.Email),
new Claim(WellKnownClaimTypes.UserId, me.Id.ToString()),
});
var tokenHandler = new JwtSecurityTokenHandler();
var tokenDescriptor = new SecurityTokenDescriptor
{
Subject = identity,
Expires = DateTime.UtcNow.AddHours(12),
SigningCredentials = new SigningCredentials(
new SymmetricSecurityKey(Startup.SharedSecret),
SecurityAlgorithms.HmacSha256Signature)
};
SecurityToken token = tokenHandler.CreateToken(tokenDescriptor);
string tokenString = tokenHandler.WriteToken(token);
await eventSender.SendAsync <string, Person>("online", me);
return(new LoginPayload(me, tokenString, "bearer", input.ClientMutationId));
}