private async Task DownloadTimelineHelperAsync()
{
// Create a list of tasks
var availableCountries = this.GetListOfProperty(CountryProperty.SLUG);
List <Task <CountryTimeline> > taskList = new List <Task <CountryTimeline> >();
foreach (var country in availableCountries)
{
taskList.Add(apiHandler.LoadCountryTimelineAsync(country));
}
// Await all in parallel
var results = await Task.WhenAll(taskList);
OnDataLoaded(new DataPercentlyLoadedEventArgs(80));
// Add the results to the DataStore
CountryTimeline tmpGlobalSum = new CountryTimeline();
dataStore.Timeline = new TimelineData();
foreach (var result in results)
{
// Take first element, just to get the CountryName
string countryName = result.Days.First().Country;
if (dataStore.Timeline.Countries.ContainsKey(countryName))
{
throw new Exception($"{countryName} already exists in Dict!");
}
else
{
// Add the current CountryTimeline to the DataStore
dataStore.Timeline.Countries.Add(countryName, result);
foreach (Day day in result.Days)
{
var tmpDate = tmpGlobalSum.Days.Where(i => i.Date == day.Date).FirstOrDefault();
if (tmpDate == null)
{
tmpGlobalSum.Days.Add(new Day()
{
Country = "Global", Date = day.Date, Confirmed = day.Confirmed, Active = day.Active, Recovered = day.Recovered, Deaths = day.Deaths
});
}
else
{
tmpDate.Confirmed += day.Confirmed;
tmpDate.Active += day.Active;
tmpDate.Recovered += day.Recovered;
tmpDate.Deaths += day.Deaths;
}
}
}
}
dataStore.Timeline.Countries.Add("Global", tmpGlobalSum);
OnDataLoaded(new DataPercentlyLoadedEventArgs(90));
}
public static List <DataElement> GetStatisticOfTimeline(this SelectableStatistics stat, CountryTimeline timeline)
{
List <DataElement> dataElements = new List <DataElement>();
foreach (var day in timeline.Days)
{
DataElement element = new DataElement();
element.Date = day.Date;
switch (stat)
{
case SelectableStatistics.ConfirmedCases:
element.Value = day.Confirmed;
break;
case SelectableStatistics.ActiveCases:
element.Value = day.Active;
break;
case SelectableStatistics.Deaths:
element.Value = day.Deaths;
break;
case SelectableStatistics.Recovered:
element.Value = day.Recovered;
break;
}
dataElements.Add(element);
}
return(dataElements);
}
