/// <summary>
/// Create a new user account. Some crude validation will take place to ensure it is valid.
/// </summary>
/// <param name="userName">The username of the account.</param>
/// <param name="password">The password of the account.</param>
/// <returns>A response containing success/failure of the operation and an error message if one occurs.</returns>
public async Task <UserResponse> Create(string userName, string password)
{
int nextUserId;
User newUser;
lock (_newUserLock)
{
if (!_usersValidator.IsPasswordValid(password, out string errorMessage))
{
return(UserResponse.CreateFailedResult(errorMessage));
}
if (!_usersValidator.IsUsernameUnique(password, _context, out errorMessage))
{
return(UserResponse.CreateFailedResult(errorMessage));
}
_currentMaxUserId++;
nextUserId = _currentMaxUserId;
}
newUser = new User(nextUserId, userName, password);
_context.Add(newUser.UserId, newUser);
return(UserResponse.CreateSuccessfulResult(newUser));
}
/// <summary>
/// Delete a user account.
/// </summary>
/// <param name="userId">The ID of the user to delete.</param>
/// <returns>A response containing success/failure of the operation and an error message if one occurs.</returns>
public async Task <UserResponse> Delete(int userId)
{
if (!_context.TryGetValue(userId, out User existingUser))
{
return(UserResponse.CreateFailedResult($"Could not find user with ID = {userId} to delete."));
}
_context.Remove(userId);
return(UserResponse.CreateSuccessfulResult(User.Empty));
}
/// <summary>
/// Update the details of a registered user. The properties that can be modified are the username
/// and the password.
/// </summary>
/// <param name="user">The user details of the account to be modified.</param>
/// <returns>A response containing success/failure of the operation and an error message if one occurs.</returns>
public async Task <UserResponse> Update(User user)
{
if (!_context.TryGetValue(user.UserId, out User existingUser))
{
return(UserResponse.CreateFailedResult($"Could not find user with ID = {user.UserId} to update."));
}
if (!_usersValidator.IsUsernameUnique(user.Password, _context, out string errorMessage))
{
return(UserResponse.CreateFailedResult(errorMessage));
}
_context[user.UserId] = user;
return(UserResponse.CreateSuccessfulResult(user));
}