/// <summary>
/// Read from database if this user is registered and authorized to login
/// </summary>
/// <param name="requset"></param>
/// <returns></returns>
internal async Task <LoginResposeModel> AuthorizeFromDatabase(LoginRequsetModel requset)
{
LoginResposeModel result = new LoginResposeModel();
//Since plain-text password is not saved in db, then it has to be hashed to find it in db
var hashedPassword = await GetHashedPassword(requset.Username, requset.Password);
IsError = string.IsNullOrEmpty(hashedPassword);
try
{
if (!IsError)
{
_signedInUser = _userRepository.GetUser(requset.Username, hashedPassword);
result.IsAuthorized = _signedInUser != null;
result.UserLevel = _signedInUser.UserLevel;
}
}
catch (Exception e)
{
IsError = true;
_logger.Error(e, "Failed to get user record");
}
return(result);
}
/// <summary>
/// Login user implementation
/// </summary>
/// <param name="request"></param>
/// <returns></returns>
public async Task <LoginResposeModel> LoginUser(LoginRequsetModel request)
{
LoginResposeModel result = new LoginResposeModel();
//Try to get from the cache first
result = AuthorizeFromCache(request);
//If not available, search from db
if (!result.IsAuthorized)
{
result = await AuthorizeFromDatabase(request);
}
//Prepare response and cache it
if (result.IsAuthorized && !IsError)
{
result.Success = true;
result.LastActiveTime = DateTimeOffset.UtcNow;
result.Username = request.Username;
if (string.IsNullOrEmpty(result.AccessToken))
{
result.AccessToken = CreateAccessToken(request.Username);
result.FirstActiveTime = DateTimeOffset.UtcNow;
}
_cacheManagement.SetOnly(request.Username, result);
}
return(result);
}
/// <summary>
/// Read from the cache if the user is still logged in
/// </summary>
/// <param name="requset"></param>
/// <returns></returns>
internal LoginResposeModel AuthorizeFromCache(LoginRequsetModel requset)
{
LoginResposeModel result = new LoginResposeModel();
var cachedItem = _cacheManagement.GetOnly(requset.Username) as LoginResposeModel;
if (cachedItem != null)
{
result = cachedItem;
}
return(result);
}
/// <summary>
/// When logout, Remove the logged in user from the cache
/// </summary>
/// <param name="request"></param>
/// <returns></returns>
public Task <LoginResposeModel> LogoutUser(LoginRequsetModel request)
{
var result = new LoginResposeModel();
try
{
_cacheManagement.Expire(request.Username);
result.Success = true;
}
catch (Exception e)
{
IsError = true;
_logger.Error(e, "Failed to logout user");
}
return(Task.FromResult(result));
}
