public DateTime GetNextTripDate(ApplicationUser applicationUser)
        {
            DateTime nextTripDate;

            // If its been awhile since they went shopping...
            if (applicationUser.LastWentShoppingAt < DateTime.Now.AddDays(-7) || applicationUser.LastWentShoppingAt > DateTime.Now)
            {
                nextTripDate = DateTime.Now;
            }
            // Otherwise, normal schedule
            else {
                nextTripDate = applicationUser.LastWentShoppingAt.AddDays(7); // Assume a weekly trip for now
            }

            return nextTripDate;
        }
        public GroceryList Get(ApplicationUser applicationUser, string applicationUserId)
        {
            var nextTripDate = applicationUser.NextShoppingTripAt;
            var delta = (nextTripDate - DateTime.Now).Days;

            var fudgeFactor = 0;
            if (delta < 3) fudgeFactor = 2;
            if (delta < 2) fudgeFactor = 3;

            var cutoff = nextTripDate.AddDays(fudgeFactor);
            var items = groceryService.GetAll(applicationUserId)
                .Where(g => g.NextPurchaseAt <= cutoff)
                .OrderBy(g => g.GroceryCategory.Priority)
                .ThenBy(g => g.Name);

            var totalCost = items.Count() > 0 ? items.Sum(g => g.AverageCost) : 0;

            return new GroceryList() { Date = applicationUser.NextShoppingTripAt, Groceries = items.ToList(), TotalCost = totalCost };
        }
        public async Task<ActionResult> ExternalLoginConfirmation(ExternalLoginConfirmationViewModel model, string returnUrl)
        {
            if (User.Identity.IsAuthenticated)
            {
                return RedirectToAction("Index", "Manage");
            }

            if (ModelState.IsValid)
            {
                // Get the information about the user from the external login provider
                var info = await AuthenticationManager.GetExternalLoginInfoAsync();
                if (info == null)
                {
                    return View("ExternalLoginFailure");
                }
                var user = new ApplicationUser { UserName = model.Email, Email = model.Email };
                var result = await UserManager.CreateAsync(user);
                if (result.Succeeded)
                {
                    result = await UserManager.AddLoginAsync(user.Id, info.Login);
                    if (result.Succeeded)
                    {
                        await SignInManager.SignInAsync(user, isPersistent: false, rememberBrowser: false);
                        return RedirectToLocal(returnUrl);
                    }
                }
                AddErrors(result);
            }

            ViewBag.ReturnUrl = returnUrl;
            return View(model);
        }
        public async Task<ActionResult> Register(RegisterViewModel model)
        {
            if (ModelState.IsValid)
            {
                var user = new ApplicationUser { UserName = model.Email, Email = model.Email };
                var result = await UserManager.CreateAsync(user, model.Password);
                if (result.Succeeded)
                {
                    await SignInManager.SignInAsync(user, isPersistent:false, rememberBrowser:false);
                    
                    // For more information on how to enable account confirmation and password reset please visit http://go.microsoft.com/fwlink/?LinkID=320771
                    // Send an email with this link
                    // string code = await UserManager.GenerateEmailConfirmationTokenAsync(user.Id);
                    // var callbackUrl = Url.Action("ConfirmEmail", "Account", new { userId = user.Id, code = code }, protocol: Request.Url.Scheme);
                    // await UserManager.SendEmailAsync(user.Id, "Confirm your account", "Please confirm your account by clicking <a href=\"" + callbackUrl + "\">here</a>");

                    return RedirectToAction("Index", "Home");
                }
                AddErrors(result);
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }