/// <summary>
/// Gets a list of calendar events for a user from storage or the schedule site.
/// </summary>
/// <param name="user">The user to retrieve the calendar events for.</param>
/// <param name="startDate">Start date to get event from.</param>
/// <param name="endDate">End date to get events to.</param>
public async Task <List <CalendarEvent> > GetEvents(ApplicationUser user, DateTime startDate, DateTime endDate)
{
string html = await _downloadLogic.GetScheduleHtml(user);
List <CalendarEvent> onlineEvents = _downloadLogic.ParseScheduleHtml(html, user.ScheduleUsername);
// Update storage with new and changed events
// TODO: This should be done in a scheduled job in the future
// TODO: Check whether we actually need to download again if it's been done recently
foreach (CalendarEvent onlineEvent in onlineEvents)
{
CalendarEvent storageEvent = _storageLogic.GetEvent(onlineEvent.UserName, onlineEvent.StartDate);
if (storageEvent == null)
{
// Add the new event
_storageLogic.AddEvent(onlineEvent);
}
else if (storageEvent.IsDifferentFrom(onlineEvent))
{
// Replace the existing event if it's been changed
_storageLogic.RemoveEvent(storageEvent);
_storageLogic.AddEvent(onlineEvent);
}
}
List <CalendarEvent> storageEvents = _storageLogic.GetEvents(user.ScheduleUsername, startDate, endDate);
if (onlineEvents.Any())
{
// Determine which calendar events have been canceled and should be removed
// Only look at storage events that start today because online events don't include history
// TODO: This should be done in a scheduled job in the future
var storageEventsToRemove = new List <CalendarEvent>();
foreach (CalendarEvent storageEvent in storageEvents.Where(se => se.StartDate > onlineEvents.Min(oe => oe.StartDate.Date)))
{
CalendarEvent onlineEvent = onlineEvents.FirstOrDefault(e => e.StartDate == storageEvent.StartDate);
if (onlineEvent == null)
{
// Add the event for removal
storageEventsToRemove.Add(storageEvent);
}
}
// Remove the canceled events
foreach (CalendarEvent storageEvent in storageEventsToRemove)
{
_storageLogic.RemoveEvent(storageEvent);
storageEvents.RemoveAll(e => e.StartDate == storageEvent.StartDate);
}
}
return(storageEvents);
}