public async Task <NotificationSummaryViewModel> GetSummaryNotifications(ClaimsPrincipal user)
{
var userId = _userManager.GetUserId(user);
var cacheKey = GetNotificationsCacheId(userId);
return(await _memoryCache.GetOrCreateAsync(cacheKey, async entry =>
{
var resp = await GetNotifications(new NotificationsQuery()
{
Seen = false, Skip = 0, Take = 5, UserId = userId
});
entry.SetAbsoluteExpiration(TimeSpan.FromMilliseconds(_cacheExpiryMs));
var res = new NotificationSummaryViewModel()
{
Last5 = resp.Items, UnseenCount = resp.Count
};
entry.Value = res;
return res;
}));
}
private async Task <NotificationSummaryViewModel> FetchNotificationsFromDb(string userId)
{
var resp = new NotificationSummaryViewModel();
using (var _db = _factory.CreateContext())
{
resp.UnseenCount = _db.Notifications
.Where(a => a.ApplicationUserId == userId && !a.Seen)
.Count();
if (resp.UnseenCount > 0)
{
try
{
resp.Last5 = (await _db.Notifications
.Where(a => a.ApplicationUserId == userId && !a.Seen)
.OrderByDescending(a => a.Created)
.Take(5)
.ToListAsync())
.Select(a => ToViewModel(a))
.ToList();
}
catch (System.IO.InvalidDataException)
{
// invalid notifications that are not pkuzipable, burn them all
var notif = _db.Notifications.Where(a => a.ApplicationUserId == userId);
_db.Notifications.RemoveRange(notif);
_db.SaveChanges();
resp.UnseenCount = 0;
resp.Last5 = new List <NotificationViewModel>();
}
}
else
{
resp.Last5 = new List <NotificationViewModel>();
}
}
return(resp);
}