/// <summary>
/// Возвращает экземпляр класса EventManager
/// </summary>
/// <returns>Экземпляр класса EventManager</returns>
static public EventManagerBD GetInstance()
{
if (instance == null)
{
instance = new EventManagerBD();
}
return(instance);
}
private async void StartParse()
{
parser = new ParserForNewFrontend("https://concertinfo.ru/");
IsLoading = true;
Events = await parser.ParseAsync();
if (Events == null)
{
Events = await EventManagerBD.GetInstance().LoadDataAsync();
}
IsLoading = false;
FilterOptions.Locations = new List <string>(Events.Select((ev) => ev.Location).Distinct());
Sort();
}
public DataViewModel(FilterOptions fo)
{
FilterOptions = fo;
FilterOptions.SubmitFilters = new RelayCommand(() => Sort());
SortedEvents = new ObservableCollection <Event>();
Events = new List <Event>();
ClearSearchText = new RelayCommand(() => SearchText = "");
Synchronize = new RelayCommand(async() => {
if (IsSynchronizing)
{
return;
}
IsSynchronizing = true;
await EventManagerBD.GetInstance().SynchronizeAsync(Events);
IsSynchronizing = false;
});
StartParse();
}