Initial Upgrade to .NET Core 2.0 (#50)

* Ardalis/upgrade1 (#44)

* Upgrading to netcore 2.0
Updating repository to support async options and refactoring to use it.

* Starting work on tracking customer orders feature.

* Cleaning up some bugs
Working on basket view component implementation

* Fixing up styles, especially for basket in header.

* Adding Order Features (#47)

* Working on order model binding from checkout page - WIP

* Small layout tweaks (#43)

* Updating quantities implemented.

* Fixed basket widget count

* Order History (#49)

* working on creating and viewing orders.
* Working on wiring up listing of orders
* List orders page works as expected. Needed to support ThenInclude scenarios. Currently using strings.

src/ApplicationCore/Entities/OrderAggregate/Address.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+
+namespace ApplicationCore.Entities.OrderAggregate
+{
+    public class Address // ValueObject
+    {
+        public String Street { get; private set; }
+
+        public String City { get; private set; }
+
+        public String State { get; private set; }
+
+        public String Country { get; private set; }
+
+        public String ZipCode { get; private set; }
+
+        private Address() { }
+
+        public Address(string street, string city, string state, string country, string zipcode)
+        {
+            Street = street;
+            City = city;
+            State = state;
+            Country = country;
+            ZipCode = zipcode;
+        }
+
+        //protected override IEnumerable<object> GetAtomicValues()
+        //{
+        //    yield return Street;
+        //    yield return City;
+        //    yield return State;
+        //    yield return Country;
+        //    yield return ZipCode;
+        //}
+
+    }
+}

src/ApplicationCore/Entities/OrderAggregate/CatalogItemOrdered.cs

@@ -0,0 +1,23 @@
+namespace ApplicationCore.Entities.OrderAggregate
+{
+    /// <summary>
+    /// Represents the item that was ordered. If catalog item details change, details of
+    /// the item that was part of a completed order should not change.
+    /// </summary>
+    public class CatalogItemOrdered // ValueObject
+    {
+        public CatalogItemOrdered(int catalogItemId, string productName, string pictureUri)
+        {
+            CatalogItemId = catalogItemId;
+            ProductName = productName;
+            PictureUri = pictureUri;
+        }
+        private CatalogItemOrdered()
+        {
+            // required by EF
+        }
+        public int CatalogItemId { get; private set; }
+        public string ProductName { get; private set; }
+        public string PictureUri { get; private set; }
+    }
+}

src/ApplicationCore/Entities/OrderAggregate/Order.cs

@@ -0,0 +1,48 @@
+using ApplicationCore.Interfaces;
+using Microsoft.eShopWeb.ApplicationCore.Entities;
+using System;
+using System.Collections.Generic;
+
+namespace ApplicationCore.Entities.OrderAggregate
+{
+    public class Order : BaseEntity, IAggregateRoot
+    {
+        private Order()
+        {
+        }
+
+        public Order(string buyerId, Address shipToAddress, List<OrderItem> items)
+        {
+            ShipToAddress = shipToAddress;
+            _orderItems = items;
+            BuyerId = buyerId;
+        }
+        public string BuyerId { get; private set; }
+
+        public DateTimeOffset OrderDate { get; private set; } = DateTimeOffset.Now;
+        public Address ShipToAddress { get; private set; }
+
+        // DDD Patterns comment
+        // Using a private collection field, better for DDD Aggregate's encapsulation
+        // so OrderItems cannot be added from "outside the AggregateRoot" directly to the collection,
+        // but only through the method Order.AddOrderItem() which includes behavior.
+        private readonly List<OrderItem> _orderItems = new List<OrderItem>();
+
+        public IReadOnlyCollection<OrderItem> OrderItems => _orderItems;
+        // Using List<>.AsReadOnly() 
+        // This will create a read only wrapper around the private list so is protected against "external updates".
+        // It's much cheaper than .ToList() because it will not have to copy all items in a new collection. (Just one heap alloc for the wrapper instance)
+        //https://msdn.microsoft.com/en-us/library/e78dcd75(v=vs.110).aspx 
+
+        public decimal Total()
+        {
+            var total = 0m;
+            foreach (var item in _orderItems)
+            {
+                total += item.UnitPrice * item.Units;
+            }
+            return total;
+        }
+
+    }
+}

src/ApplicationCore/Entities/OrderAggregate/OrderItem.cs

@@ -0,0 +1,22 @@
+using Microsoft.eShopWeb.ApplicationCore.Entities;
+
+namespace ApplicationCore.Entities.OrderAggregate
+{
+
+    public class OrderItem : BaseEntity
+    {
+        public CatalogItemOrdered ItemOrdered { get; private set; }
+        public decimal UnitPrice { get; private set; }
+        public int Units { get; private set; }
+
+        protected OrderItem()
+        {
+        }
+        public OrderItem(CatalogItemOrdered itemOrdered, decimal unitPrice, int units)
+        {
+            ItemOrdered = itemOrdered;
+            UnitPrice = unitPrice;
+            Units = units;
+        }
+    }
+}