/// <summary>
/// Deletes city from favorites after the user clicked on favorite button under weather details of the city
/// and refreshes the content on the page
/// </summary>
/// <returns></returns>
private async Task DeleteCityFromFavorites(int cityId)
{
// get the current favorites list
await _firebaseHelper.GetFavoritesCities();
// delete the city from favorites
if (await _firebaseHelper.CityIsInFavorites(cityId))
{
await _firebaseHelper.DeleteCityFromFavorites(cityId);
}
else
{
// if the city is not in favorites for some reason, then show notification to the user
// to contact with the developer
await new MessageDialog("There is not such city in the database. \n " +
"Let's try to contact with the autor of this application, please").ShowAsync();
}
// refresh the layout
//await Task.Delay(TimeSpan.FromSeconds(5));
await RefreshFavoriteCitiesList();
}
/// <summary>
/// Adds city to the favorite cities list if the city doesn't belong to it
/// Deletes city from the favorite cities list if the city belong to it
/// </summary>
/// <returns></returns>
private async Task AddOrDeleteCityFromFavorites()
{
// get the current favorites list
FirebaseHelper firebaseHelper = new FirebaseHelper();
await firebaseHelper.GetFavoritesCities();
// Add or delete the city form favorites
if (await firebaseHelper.CityIsInFavorites(_weatherForecastService.CityId))
{
await firebaseHelper.DeleteCityFromFavorites(_weatherForecastService.CityId);
}
else
{
await firebaseHelper.PutFavoriteCity(
_weatherForecastService.CityName,
_weatherForecastService.CityId
);
}
// reload favorite icon
await IsCityInFavorites();
}