/// <summary>
/// This is the default action.
/// It queries the events first by the two calendars.
/// If there are no events registered in the calendars,
/// the method calls the internal static class which creates the 10 events
/// and assigns them to the calendars.
/// The expression continues with querying the data
/// according to the passed nullable parameters for filtering and ordering
/// and then returns the Index View with the Index View Model.
/// </summary>
public ActionResult Index(DateTime?filterDate, int?calendarName, int?orderBy)
{
IQueryable <Event> events = manager.GetEvents()
.Where(ev => ev.Parent.Title == Constants.CalendarOne ||
ev.Parent.Title == Constants.CalendarTwo);
if (!events.Any())
{
CustomEvents.CreateEvents();
}
// Queries only the events which are Visible and have Live status
events = events.Where(ev => ev.Visible == true)
.Where(ev => ev.Status == ContentLifecycleStatus.Live);
//The query expression filters the data by date if such is passed as a parameter.
if (filterDate != null)
{
events = events.Where(ev => ev.EventStart == filterDate) ??
throw new ArgumentNullException(Constants.NoEvents);
TempData["Message"] = Constants.NoEvents;
}
//The query expression filters the data by calendar if a calendar is passed as a parameter.
if (calendarName != null)
{
var calendar = Enum.GetName(typeof(CalendarNames), calendarName);
events = events.Where(ev => ev.Parent.Title.Contains(calendar));
}
//The query expression orders the events if an ordering parameter is passed.
if (orderBy != null)
{
switch (orderBy)
{
case 1: events = events.OrderBy(ev => ev.EventStart); break;
case 2: events = events.OrderBy(ev => ev.EventEnd); break;
case 3: events = events.OrderBy(ev => ev.Title); break;
default:
break;
}
}
//Creates IndexViewModel of the events and return Index View with it.
var eventsModel = events.Select(ev => new EventViewModel(ev));
var model = new IndexViewModel(eventsModel);
return(View("Index", model));
}