public async Task <bool> HandleAsync <TCommand>(IResolverContext context, CancellationToken token)
{
try
{
var httpContext = (HttpContext)context.ContextData[nameof(HttpContext)];
var headers = new Dictionary <string, string>();
foreach (var header in httpContext.Request.Headers)
{
headers.Add(header.Key, header.Value.FirstOrDefault());
}
using (var _ = AnalyticsService.StartRequestOperation(this, typeof(TCommand).Name, headers))
{
var command = context.Argument <TCommand>("command");
if (command == null)
{
throw new ArgumentException("Unable to extract command from resolver context");
}
AnalyticsService.TraceVerbose(this, $"{typeof(TCommand).Name} received", command.ToObjectDictionary());
var commandResult = await HandleCommandAsync <TCommand>(context, command, token);
if (commandResult.IsFailure)
{
context.ReportError(new ErrorBuilder().SetMessage(commandResult.Error.ToString()).Build());
return(default);
public IEnumerable <ICharacter> GetCharacter(string[] characterIds, IResolverContext context)
{
foreach (string characterId in characterIds)
{
ICharacter character = _repository.GetCharacter(characterId);
if (character == null)
{
context.ReportError(
"Could not resolve a charachter for the " +
$"character-id {characterId}.");
}
else
{
yield return(character);
}
}
}
private static void ReportErrors(
NameString schemaName,
IResolverContext context,
IEnumerable <IError> errors)
{
foreach (IError error in errors)
{
IErrorBuilder builder = ErrorBuilder.FromError(error)
.SetExtension(_remoteErrorField, error.RemoveException())
.SetExtension(_schemaNameErrorField, schemaName.Value);
if (error.Path != null)
{
Path path = RewriteErrorPath(error, context.Path);
builder.SetPath(path)
.ClearLocations()
.AddLocation(context.FieldSelection);
}
else if (IsHttpError(error))
{
builder.SetPath(context.Path)
.ClearLocations()
.AddLocation(context.FieldSelection);
}
context.ReportError(builder.Build());
}
}
private static void ReportErrors(
IResolverContext context,
IEnumerable <IError> errors)
{
IReadOnlyCollection <object> path = context.Path.ToCollection();
foreach (IError error in errors)
{
context.ReportError(error.AddExtension("remote", path));
}
}
/// <summary>
/// Retrieve data related to user of given username and password.
/// </summary>
/// <param name="username">A unique username of the user.</param>
/// <param name="password">An unhashed password.</param>
/// <param name="resolverContext">Resolver context used in error reporting.</param>
/// <returns>An instance of proxy class <see cref="UserSignInPayload"/> containing some of user fields.</returns>
public UserSignInPayload SignIn(string username, string password, IResolverContext resolverContext)
{
if (username == null || password == null)
{
return(null);
}
var user = _context.Users.SingleOrDefault(x => x.Username == username);
if (user == null)
{
resolverContext.ReportError(ErrorBuilder.New()
.SetCode(UserSignInErrorCode.UserNotFound.ToString())
.SetMessage("User of given username was not found!")
.Build());
return(null);
}
if (!_hasher.IsMatching(password, user.Password))
{
resolverContext.ReportError(ErrorBuilder.New()
.SetCode(UserSignInErrorCode.PasswordMismatch.ToString())
.SetMessage("Wrong password!")
.Build());
return(null);
}
return(new UserSignInPayload()
{
Id = user.Id,
Nickname = user.Nickname,
Token = user.Token
});
}
public IEnumerable <Department> GetDepartments(string[] departments, IResolverContext context)
{
foreach (string deptId in departments)
{
Department dept = _repository.GetDepartment(deptId);
if (dept == null)
{
context.ReportError(
"Could not resolve a department for the " +
$"department-id {deptId}.");
}
else
{
yield return(dept);
}
}
}
public IEnumerable <Student> GetStudents([Parent] Department department, IResolverContext context)
{
var dept = _repository.GetDepartment(department.Id);
if (dept == null)
{
context.ReportError(
"Could not resolve a department for the " +
$"department-id {department.Id}.");
}
else
{
foreach (var s in dept.Students)
{
yield return(s);
}
}
}
protected override Task <Response <TPayload> > HandleCommandAsync <TPayload, TCommand>(IResolverContext context, TCommand command, CancellationToken token)
{
if (!TryExtractUser(context, out var authenticatedUser))
{
context.ReportError(new ErrorBuilder().SetMessage(AuthErrors.NotAuthenticated.ToString()).Build());
return(Task.FromResult(AnalyticsService.TraceErrorResponse <TPayload>(this, AuthErrors.NotAuthenticated)));
}
;
var commandHandler = context.Service <IAuthenticatedCommandHandler <TPayload, TCommand, TUser> >();
if (commandHandler == null)
{
throw new ArgumentException("No command handler found for command");
}
return(commandHandler.HandleAsync(command, authenticatedUser, token));
}
private static void ReportErrors(
IResolverContext context,
IEnumerable <IError> errors)
{
foreach (IError error in errors)
{
IErrorBuilder builder = ErrorBuilder.FromError(error)
.SetExtension("remote", error);
if (error.Path != null)
{
Path path = RewriteErrorPath(error, context.Path);
builder.SetPath(path)
.ClearLocations()
.AddLocation(context.FieldSelection);
}
context.ReportError(builder.Build());
}
}
/// <summary>
/// Create and store an instance of <see cref="User"/>.
/// </summary>
/// <param name="nickname">Nickname of the user.</param>
/// <param name="username">A unique username of the user.</param>
/// <param name="password">An unhashed password.</param>
/// <param name="resolverContext">Resolver context used in error reporting.</param>
/// <returns>An instance of proxy class <see cref="UserSignUpPayload"/> containing some of user fields.</returns>
public UserSignUpPayload SignUp(string nickname, string username, string password, IResolverContext resolverContext)
{
if (nickname == null || username == null || password == null)
{
return(null);
}
if (_context.Users.Any(x => x.Username == username))
{
resolverContext.ReportError(ErrorBuilder.New()
.SetCode(UserSignUpErrorCode.UsernameNotUnique.ToString())
.SetMessage("Username is not unique!")
.Build());
return(null);
}
var user = new User()
{
Nickname = nickname,
Username = username,
Password = _hasher.CreateHash(password)
};
// Add and save user to generate Id
_context.Add(user);
_context.SaveChanges();
// Id and Username to ensures unique hash
user.Token = _tokenizer.CreateToken(user.Id + ";" + user.Username);
_context.Update(user);
_context.SaveChanges();
return(new UserSignUpPayload()
{
Id = user.Id,
Nickname = user.Nickname,
Token = user.Token
});
}
protected override async Task <Response <bool> > HandleCommandAsync <TCommand>(IResolverContext context, TCommand command, CancellationToken token)
{
if (!TryExtractUser(context, out var authenticatedUser))
{
context.ReportError(new ErrorBuilder().SetMessage(AuthErrors.NotAuthenticated.ToString()).Build());
return(AnalyticsService.TraceErrorResponse <bool>(this, AuthErrors.NotAuthenticated));
}
;
var commandHandler = context.Service <IVoidAuthenticatedCommandHandler <TCommand, TUser> >();
if (commandHandler == null)
{
throw new ArgumentException("No command handler found for command");
}
var result = await commandHandler.HandleAsync(command, authenticatedUser, token);
return(result.IsFailure
? Response.Failure <bool>(result.Error)
: Response.Success(true));
}
private static void ReportError(IResolverContext context, int item, Exception ex)
{
Path itemPath = context.Path.Append(item);
context.ReportError(ex, error => error.SetPath(itemPath));
}
public void ReportError(string errorMessage) => _resolverContext.ReportError(errorMessage);
public string Hello([Service] IResolverContext context)
{
context.ReportError(new Error("Hello world from error", "001"));
return("hello");
}
