Exercise Files

Ch03/03_Solution/Website/Controllers/InventoryController.cs

@@ -0,0 +1,174 @@
+using HPlusSports.Models;
+using System;
+using System.Linq;
+using System.Web.Mvc;
+
+namespace HPlusSports.Controllers
+{
+    [Authorize(Roles = UserRoles.Admin)]
+    public class InventoryController : Controller
+    {
+        private HPlusSportsDbContext _context;
+
+        public InventoryController()
+          : this(new HPlusSportsDbContext())
+        {
+        }
+
+        public InventoryController(HPlusSportsDbContext context)
+        {
+            _context = context;
+        }
+
+        public ActionResult Index()
+        {
+            var products =
+              _context.Products
+                .OrderBy(x => x.CategoryId)
+                .ThenBy(x => x.Name);
+
+            return View(products);
+        }
+
+        [HttpGet]
+        public ActionResult Create()
+        {
+            return View();
+        }
+
+        [HttpPost]
+        public ActionResult Create(Product product)
+        {
+            if (!ModelState.IsValid)
+            {
+                return View();
+            }
+
+            product.LastUpdated = DateTime.UtcNow;
+            product.LastUpdatedUserId = GetUserId(this);
+
+            _context.Products.Add(product);
+            _context.SaveChanges();
+
+            TempData["SuccessMessage"] =
+              $"Successfully created \"{product.Name}\"";
+
+            return RedirectToAction(nameof(Index));
+        }
+
+        [HttpGet]
+        public ActionResult Update(long id)
+        {
+            var existing = _context.Products.Find(id);
+
+            if (existing == null)
+            {
+                return ProductListError(
+                  $"Couldn't update product #\"{id}\": product not found!"
+                );
+            }
+
+            return View(existing);
+        }
+
+        [HttpPost]
+        public ActionResult Update(long id, Product product)
+        {
+            if (!ModelState.IsValid)
+            {
+                return View();
+            }
+
+            var existing = _context.Products.Find(id);
+
+            if (existing == null)
+            {
+                return ProductListError(
+                  $"Couldn't update product #\"{id}\": product not found!"
+                );
+            }
+
+            var hasPriceChanged = existing.Price != product.Price;
+
+            existing.CategoryId = product.CategoryId;
+            existing.Description = product.Description;
+            existing.MSRP = product.MSRP;
+            existing.Name = product.Name;
+            existing.Price = product.Price;
+            existing.SKU = product.SKU;
+            existing.Summary = product.Summary;
+
+            existing.LastUpdated = DateTime.UtcNow;
+            existing.LastUpdatedUserId = GetUserId(this);
+
+            _context.SaveChanges();
+
+            if (hasPriceChanged)
+            {
+                var cartsToUpdate =
+                  _context.ShoppingCarts
+                    .Include("Items")
+                    .Where(cart => cart.Items.Any(x => x.SKU == product.SKU));
+
+                foreach (var cart in cartsToUpdate)
+                {
+                    foreach (var cartItem in cart.Items.Where(x => x.SKU == product.SKU))
+                    {
+                        cartItem.Price = product.Price;
+                    }
+
+                    cart.Recalculate();
+                }
+            }
+
+            _context.SaveChanges();
+
+            TempData["SuccessMessage"] =
+              $"Successfully updated \"{product.Name}\"";
+
+            return RedirectToAction(nameof(Index));
+        }
+
+        public ActionResult Delete(long id)
+        {
+            var product = _context.Products.Find(id);
+
+            if (product == null)
+            {
+                return ProductListError(
+                  $"Couldn't delete \"{product.Name}\": product not found!"
+                );
+            }
+
+            _context.Products.Remove(product);
+            _context.SaveChanges();
+
+            TempData["SuccessMessage"] =
+              $"Successfully deleted \"{product.Name}\"";
+
+            return RedirectToAction(nameof(Index));
+        }
+
+        private ActionResult ProductListError(string error)
+        {
+            TempData["ErrorMessage"] = error;
+            return RedirectToAction(nameof(Index));
+        }
+
+        protected override void OnResultExecuting(ResultExecutingContext filterContext)
+        {
+            ViewData["CategoryId"] =
+              _context.Categories
+                  .Select(x => new SelectListItem
+                  {
+                      Text = x.Name,
+                      Value = x.Id.ToString(),
+                  })
+                  .ToArray();
+        }
+
+        // Overwriteable function for unit testing
+        internal Func<Controller, string> GetUserId =
+            (controller) => controller.User.Identity.Name;
+    }
+}