public async Task CreateOrdersAsync(IEnumerable <int> restaurantIds)
{
var existingRestaurantIds = await _context.Restaurants
.Where(r => restaurantIds.Contains(r.Id))
.Select(r => r.Id)
.ToListAsync();
var ordersToAdd = existingRestaurantIds
.Select(id => new Order
{
Username = Context.User.GetSub(),
OrderedAt = DateTime.Now.Truncate(),
CompletedAt = null,
RestaurantId = id,
})
.ToList();
await _context.Orders.AddRangeAsync(ordersToAdd);
await _context.SaveChangesAsync();
_updateService.SendRestaurantsUpdated(existingRestaurantIds).Forget();
var newOrderIds = ordersToAdd.Select(o => o.Id).ToList();
_updateService.SendDispatchPendingUpdate(newOrderIds).Forget();
_updateService.SendUserOrdersCreated(newOrderIds, Context.User.GetSub()).Forget();
}
