protected override async void OnNavigatedTo(NavigationEventArgs e)
{
this.Event = e.Parameter as EventViewModel;
using (this.TokenSource = new CancellationTokenSource())
{
try
{
this.IsRefreshButtonEnabled = false;
await this.Event.Refresh(this.TokenSource.Token, false);
}
catch (OperationCanceledException ex)
{
Debug.WriteLine("Operation canceled " + ex.Message);
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
finally
{
this.IsRefreshButtonEnabled = true;
}
}
}
public async Task Refresh(CancellationToken token, bool forceRefresh = false)
{
//this.Events.Clear();
EventsProgressBarr.Visibility = Visibility.Visible;
EventsProgressBarr.IsIndeterminate = true;
this.SetTitle("refreshing next meetings ...");
var needEvents = this.Events.Count == 0;
if (needEvents)
{
StackPanelLoader.Visibility = Visibility.Visible;
StackPanelLoader.Opacity = 1.0d;
ProgressRingLoader.Visibility = Visibility.Visible;
EventViewList.Visibility = Visibility.Collapsed;
ProgressRingLoader.IsActive = true;
}
var calenderViewQuery = this.Graph.Me.CalendarView;
var dsq = (DataServiceQuery<Microsoft.Graph.Event>)calenderViewQuery.Query;
// Dont start with UtcNow to not go on yesterday
var start = DateTime.UtcNow.Date.ToString("o");
var end = DateTime.UtcNow.Date.AddDays(7).ToString("o");
dsq = dsq.AddQueryOption("startDateTime", start);
dsq = dsq.AddQueryOption("endDateTime", end);
List<Microsoft.Graph.IEvent> allEvents = null;
if (forceRefresh)
this.cacheEventDays.Clear();
try
{
var events = await this.Graph.Context.ExecuteAsync<Microsoft.Graph.Event, Microsoft.Graph.IEvent>(dsq);
allEvents = events.CurrentPage.ToList();
while (events.MorePagesAvailable)
{
events = await events.GetNextPageAsync();
allEvents.AddRange(events.CurrentPage.ToList());
}
if (allEvents != null)
{
// some events could start yesterday and finish today
allEvents = allEvents.Where(ev => DateTime.Parse(ev.Start.DateTime).ToLocalTime() > DateTime.Now.ToLocalTime()).ToList();
var allEventsOrdered = allEvents.OrderBy(ev => DateTime.Parse(ev.Start.DateTime)).OrderBy(ev => ev.IsAllDay).ToList();
foreach (var ev in allEventsOrdered)
{
var evm = cacheEventDays.Values.FirstOrDefault(cEvent => cEvent.Id == ev.Id);
if (evm == null)
{
evm = new EventViewModel(ev);
cacheEventDays.Values.Add(evm);
}
evm.Index = allEventsOrdered.IndexOf(ev);
}
// check if some events are deleted
foreach (var cEvent in cacheEventDays.Values.Select(c => c).ToList())
{
var ev = allEvents.FirstOrDefault(e => e.Id == cEvent.Id);
if (ev == null)
cacheEventDays.Values.Remove(cEvent);
}
foreach (var dayEvents in this.Events)
{
foreach (var cEvent in dayEvents.Events.Select(c => c).ToList())
{
var ev = allEvents.FirstOrDefault(e => e.Id == cEvent.Id);
if (ev == null)
dayEvents.Events.Remove(cEvent);
}
}
// get the dates for each group
var allDates = cacheEventDays.Values.Select(ced => ced.StartingDate.Date).Distinct().OrderBy(d => d.Date).ToList();
foreach (var aDate in allDates)
{
List<EventViewModel> lstEventViewModel;
if (allDates.IndexOf(aDate) == 0)
lstEventViewModel = cacheEventDays.Values.Where(ev => ev.StartingDate.Date == aDate).OrderBy(ev => ev.StartingDate).OrderBy(ev => ev.IsAllDay).ToList();
else
lstEventViewModel = cacheEventDays.Values.Where(ev => ev.StartingDate.Date == aDate).OrderBy(ev => ev.StartingDate).ToList();
// get or create the group
var edvm = this.Events.FirstOrDefault(ev => ev.DateTime != null && ev.DateTime.Date == aDate);
if (edvm == null)
{
edvm = new EventDayViewModel(aDate, allDates.IndexOf(aDate));
var lastIndexOf = this.Events.IndexOf(this.Events.FirstOrDefault(e => e.DateTime.Date >= edvm.DateTime.Date));
if (lastIndexOf <= 0 || this.Events.Count == 0)
this.Events.Add(edvm);
else
this.Events.Insert(lastIndexOf, edvm);
}
foreach (var item in lstEventViewModel)
{
// if event not exist || i want to force refresh
if (!edvm.Events.Any(e => e.Id == item.Id))
{
var lastIndexOf = edvm.Events.IndexOf(edvm.Events.FirstOrDefault(e => e.StartingDate >= item.StartingDate));
if (lastIndexOf <= 0 || this.Events.Count == 0)
edvm.Events.Add(item);
else
edvm.Events.Insert(lastIndexOf, item);
}
else if (edvm.Events.Any(e => e.Id == item.Id) && forceRefresh)
{
var ev = edvm.Events.First(e => e.Id == item.Id);
ev.FillItem(item.InternalEvent);
}
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
if (needEvents)
{
var sb = GetStoryboard();
sb.Completed += async (s, o) =>
{
ProgressRingLoader.IsActive = false;
ProgressRingLoader.Visibility = Visibility.Collapsed;
StackPanelLoader.Visibility = Visibility.Collapsed;
EventViewList.Visibility = Visibility.Visible;
AppShell.Current.SetTitle("next meetings");
await UpdateUsers(forceRefresh, token);
};
sb.Begin();
}
else
{
await UpdateUsers(forceRefresh, token);
}
EventsProgressBarr.Visibility = Visibility.Collapsed;
EventsProgressBarr.IsIndeterminate = false;
}