protected override bool HandleData(ScheduleResponse data, CancellationToken token)
{
if (data == null)
{
return(false);
}
if (data.Status == ResponseStatus.AuthenticationError)
{
_requestHandler.Authenticate <MainViewModel>();
return(false);
}
if (data.Status != ResponseStatus.Success)
{
throw new Exception("An error occurred on the server while fetching the schedule.");
}
if (!token.IsCancellationRequested)
{
// Now for the fun part!
// The days group their periods by UTC date
// but since we're in local date, some "days" may hold periods outside of their UTC date
// so we have to disassemble them and re-assemble new days
var days = data.Days.SelectMany(d => ForceSameStartAndEndDays(d.Periods))
.GroupBy(p => p.Start.Date)
.Select(g => new StudyDay {
Day = g.Key, Periods = g.ToArray()
})
.ToArray();
var missingDays = Enumerable.Range(0, MinimumDaysInWeek)
.Select(n => WeekDate.AddDays(n))
.Where(d => days.All(d2 => d.Date != d2.Day.Date))
.Select(d => new StudyDay {
Day = d.Date, Periods = new Period[0]
});
Days = days.Concat(missingDays)
.OrderBy(d => d.Day)
.ToArray();
}
return(true);
}
protected override CachedTask <ScheduleResponse> GetData(bool force, CancellationToken token)
{
if (!force)
{
return(CachedTask.NoNewData <ScheduleResponse>());
}
Func <Task <ScheduleResponse> > getter = () => _requestHandler.ExecuteAsync(() =>
{
var request = new ScheduleRequest
{
Language = CultureInfo.CurrentUICulture.TwoLetterISOLanguageName,
WeekStart = WeekDate
};
return(_isaService.GetScheduleAsync(request, token));
});
if (DateTime.Now >= WeekDate && (DateTime.Now - WeekDate).TotalDays < DaysInWeek)
{
// cache ID must be non-zero so that other requests don't think this can be used as a placeholder
return(CachedTask.Create(getter, 1, WeekDate.AddDays(DaysInWeek)));
}
return(CachedTask.DoNotCache(getter));
}