BealeEngineering/BealeEngineering/BealeEngineering.Core/Logic/Adapter/SaleInvoice.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BealeEngineering.Core.Logic.Adapter
{
    public class SaleInvoice
    {
        public SaleInvoice()
        {
            // ensure sale invoice hasn't changed
            int propertyCount = new Model.Sale.Invoice().GetType().GetProperties().Count();
            if (propertyCount != 14)
            {
                throw new Exception("Model.Import.XeroInvoiceFlatFile has changed, it's adapter class may need updating.");
            }
            propertyCount = new Model.Sale.Invoice.InvoiceLine().GetType().GetProperties().Count();
            if (propertyCount != 10)
            {
                throw new Exception("Model.Import.XeroInvoiceFlatFile.LineItem has changed, it's adapter class may need updating.");
            }
        }

        public Model.Sale.Invoice XeroInvoiceFlatFIle(Model.Import.XeroInvoiceFlatFile xeroInvoice)
        {
            var result = XeroInvoiceFlatFile(new List<Model.Import.XeroInvoiceFlatFile> { xeroInvoice });
            if (result == null) { return null; }
            else { return result[0]; }
        }

        public List<Model.Sale.Invoice> XeroInvoiceFlatFile(List<Model.Import.XeroInvoiceFlatFile> xeroInvoiceList)
        {
            var dbInvoiceData = new List<Model.Sale.Invoice>();
            for (var i = 0; i < xeroInvoiceList.Count; i++)
            {
                if (xeroInvoiceList[i] == null) { throw new NullReferenceException(); }
                var invoice = new Model.Sale.Invoice();

                invoice.ContactName = xeroInvoiceList[i].ContactName;
                invoice.CurrencyCode = xeroInvoiceList[i].Currency;
                invoice.DueDate = xeroInvoiceList[i].DueDate;
                invoice.InvoiceDate = xeroInvoiceList[i].InvoiceDate;
                invoice.InvoiceTotal = xeroInvoiceList[i].Total;
                if (xeroInvoiceList[i].Type == "Sales invoice") { invoice.IsCreditNote = false; }
                else if (xeroInvoiceList[i].Type == "Sales credit note") { invoice.IsCreditNote = true; }
                else { throw new FormatException("Unknow value '" + xeroInvoiceList[i].Type + "' found in 'Type' field"); }
                invoice.Reference = xeroInvoiceList[i].Reference;
                invoice.SaleInvoiceNumber = xeroInvoiceList[i].InvoiceNumber;
                invoice.Status = xeroInvoiceList[i].Status;
                invoice.TaxTotal = xeroInvoiceList[i].TaxTotal;

                invoice.InvoiceLineList = new List<Model.Sale.Invoice.InvoiceLine>();
                for (int j = 0; j < xeroInvoiceList[i].LineItemList.Count; j++)
                {
                    if (xeroInvoiceList[i].LineItemList[j] == null) { throw new NullReferenceException(); }
                    var invoiceLine = new Model.Sale.Invoice.InvoiceLine();

                    invoiceLine.LineNumber = j + 1;
                    invoiceLine.AccountCode = xeroInvoiceList[i].LineItemList[j].AccountCode;
                    invoiceLine.Description = xeroInvoiceList[i].LineItemList[j].Description;
                    invoiceLine.Discount = xeroInvoiceList[i].LineItemList[j].Discount;
                    invoiceLine.InventoryItemCode = xeroInvoiceList[i].LineItemList[j].InventoryItemCode;
                    invoiceLine.Quantity = xeroInvoiceList[i].LineItemList[j].Quantity;
                    invoiceLine.TaxAmount = xeroInvoiceList[i].LineItemList[j].TaxAmount;
                    invoiceLine.TaxType = xeroInvoiceList[i].LineItemList[j].TaxType;
                    invoiceLine.UnitAmount = xeroInvoiceList[i].LineItemList[j].UnitAmount;

                    //check, as line amount is same as calculated in model
                    if (invoiceLine.LineAmount != xeroInvoiceList[i].LineItemList[j].LineAmount)
                    {
                        throw new Exception("Imported line total does not equal caluclated.");
                    }
                    invoice.InvoiceLineList.Add(invoiceLine);
                }
                dbInvoiceData.Add(invoice);
            }
            return dbInvoiceData;
        }
    }
}