Add procurement domain models (PurchaseOrder, GoodsReceipt, PurchaseReturn)

Distribution/Models/PurchaseOrderItem.cs

@@ -0,0 +1,32 @@
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Distribution.Models
+{
+    public class PurchaseOrderItem : Template
+    {
+        public Guid FK_PurchaseOrderId { get; set; }
+        [ForeignKey("FK_PurchaseOrderId")]
+        public PurchaseOrder PurchaseOrder { get; set; }
+
+        public Guid FK_ItemId { get; set; }
+        [ForeignKey("FK_ItemId")]
+        public Item Item { get; set; }
+
+        public int Quantity { get; set; }
+
+        /// <summary>Agreed cost per unit at the time the PO was issued.</summary>
+        public decimal UnitCost { get; set; }
+
+        /// <summary>Running total, incremented by createGoodsReceipt; drives PurchaseOrder.Status.</summary>
+        public int ReceivedQuantity { get; set; } = 0;
+
+        /// <summary>
+        /// Set by cancelPurchaseOrderLine. Outstanding qty for receiving purposes is
+        /// Quantity - ReceivedQuantity - CancelledQuantity.
+        /// </summary>
+        public int CancelledQuantity { get; set; } = 0;
+
+        /// <summary>True once this line is individually cancelled.</summary>
+        public bool IsCancelled { get; set; } = false;
+    }
+}