public async Task <ActionResult <int> > PlaceOrder(Order order)
{
order.CreatedTime = DateTime.Now;
order.DeliveryLocation = new LatLong(51.5001, -0.1239);
order.UserId = GetUserId();
// Enforce existence of Pizza.SpecialId and Topping.ToppingId
// in the database - prevent the submitter from making up
// new specials and toppings
foreach (var pizza in order.Pizzas)
{
pizza.SpecialId = pizza.Special.Id;
pizza.Special = null;
foreach (var topping in pizza.Toppings)
{
topping.ToppingId = topping.Topping.Id;
topping.Topping = null;
}
}
_db.Orders.Attach(order);
await _db.SaveChangesAsync();
// In the background, send push notifications if possible
var subscription = await _db.NotificationSubscriptions.Where(e => e.UserId == GetUserId()).SingleOrDefaultAsync();
if (subscription != null)
{
_ = TrackAndSendNotificationsAsync(order, subscription);
}
return(order.OrderId);
}
public async Task <NotificationSubscription> Subscribe(NotificationSubscription subscription)
{
// We're storing at most one subscription per user, so delete old ones.
// Alternatively, you could let the user register multiple subscriptions from different browsers/devices.
var userId = GetUserId();
var oldSubscriptions = _db.NotificationSubscriptions.Where(e => e.UserId == userId);
_db.NotificationSubscriptions.RemoveRange(oldSubscriptions);
// Store new subscription
subscription.UserId = userId;
_db.NotificationSubscriptions.Attach(subscription);
await _db.SaveChangesAsync();
return(subscription);
}