public App()
{
InitializeComponent();
//Get token details from sqlite db for validation
//If DB is null, will redirect to Login Screen (FastBatPage)
//Other wise validate the token expiry, if token is valid will redirect to events list screen
var token = App.Database.GetTokenDetails();
if (token == null)
{
MainPage = new FastBatPage();
}
else
{
//Validate token expiry details
DateTime issueDate = Convert.ToDateTime(token.issued);
DateTime currentDate = Convert.ToDateTime(DateTime.UtcNow.ToString("R"));
double totlaSeconds = (currentDate - issueDate).TotalSeconds;
if (totlaSeconds > token.expires_in)
{
//Delete the existing token
App.Database.DeleteToken();
//Delete the events
App.Database.DeleteEvents();
//Redirect
MainPage = new FastBatPage();
}
else
{
MainPage = new EventsView(token.access_token);
}
}
}
/// <summary>
/// Logins the process.
/// </summary>
/// <returns>The process.</returns>
async Task LoginProcess()
{
await Task.Delay(1000);
if (viewModel.CanLogin())
{
try
{
//Checking internet connection
bool internetConnection = await Authentication.CheckForInternetConnection();
//If internet is working properly, will verify the login details using api
if (internetConnection)
{
//Get the login result details based on user details
var result = await Authentication.GetToken(viewModel.Email, viewModel.Password);
string strResult = result.Replace(".issued", "issued");
result = strResult.Replace(".expires", "expires");
var tokenResult = (TokenModel)JsonConvert.DeserializeObject(result, typeof(TokenModel));
if (tokenResult.error == null && tokenResult.error_description == null)
{
//Save token details in sqlite database
App.Database.SaveTokenDetails(tokenResult);
//Redirect to Event Page
var homePage = new EventsView(tokenResult.access_token);
acInLoading.IsRunning = false;
await this.Navigation.PushModalAsync(homePage);
}
else
{
//Displaying message for login failure
acInLoading.IsRunning = false;
await DisplayAlert(string.Empty, tokenResult.error_description, "OK");
}
}
else
{
await DisplayAlert(string.Empty, "Please check your internet connection", "OK");
}
}
catch (Exception ex)
{
await DisplayAlert(string.Empty, "Something went wrong! Please try again", "OK");
}
}
else
{
await DisplayAlert(string.Empty, viewModel.ValidationErrors, "Cancel");
}
}