public async void CheckNearExhibit(IEnumerable <Exhibit> exhibits, GeoLocation gpsLocation, bool considerTimeouts)
{
foreach (Exhibit e in exhibits)
{
var dist = MathUtil.CalculateDistance(e.Location, gpsLocation);
if (dist < AppSharedData.ExhibitRadius)
{
if (considerTimeouts)
{
DateTimeOffset now = DateTimeOffset.Now;
if (e.LastNearbyTime.HasValue)
{
if (now.Subtract(e.LastNearbyTime.Value) <= dialogTimeout)
{
// dialog for this exhibit was shown recently, skip it
continue;
}
}
// update the time the dialog was last shown
using (DbManager.StartTransaction())
{
e.LastNearbyTime = now;
}
}
var result =
await
IoCManager.Resolve <INavigationService> ()
.DisplayAlert(Strings.ExhibitNearby_ExhibitNearby, Strings.ExhibitOrRouteNearby_Question_Part1 + " \"" + e.Name + "\" " + Strings.ExhibitOrRouteNearby_Question_Part2,
Strings.ExhibitOrRouteNearby_Confirm, Strings.ExhibitOrRouteNearby_Reject);
if (result)
{
await IoCManager.Resolve <INavigationService>().PushAsync(new ExhibitDetailsViewModel(e.Id));
ExhibitVisitedEvent?.Invoke(this, e);
return;
}
}
}
}
public void InvokeExhibitVisitedEvent(Exhibit exhibit)
{
ExhibitVisitedEvent?.Invoke(this, exhibit);
}
