/// <summary>
/// Validates if an order's expenses are valid, meaning all costs are accounted for
/// including order/line splits
/// </summary>
/// <returns></returns>
public virtual IEnumerable <string> ValidateExpenses()
{
//Always make sure there are >0 line items
if (LineItems.Count == 0)
{
yield return("There must be at least one line item");
}
if (Splits.Count == 0) //validate no splits
{
yield break; //TODO: For now, no splits is always valid. Later we can validate accounts are given eventually
}
if (HasLineSplits) //validate line splits
{
//if line items are split, make sure #1 all money is accounted for, #2 every line item has at least one split
foreach (var lineItem in LineItems)
{
var item = lineItem;
var splits = Splits.Where(x => x.LineItem == item).ToList();
if (!splits.Any())
{
yield return("You have a line item split with an amount but no account specified");
}
var splitTotal = splits.Sum(x => x.Amount);
var lineTotal = lineItem.Total() * (1 + EstimatedTax / 100.0m);
if (lineTotal != splitTotal)
{
yield return("You must account for the entire line item amount in each line item split");
}
}
}
else //Validate order splits
{
//If order is split, make sure all order money is accounted for
var splitTotal = Splits.Sum(x => x.Amount);
var orderTotal = GrandTotal();
//Make sure each split with an amount has an account chosen
if (Splits.Any(x => x.Amount != 0 && string.IsNullOrWhiteSpace(x.Account)))
{
yield return("You have an order split with an amount but no account specified");
}
if (splitTotal != orderTotal)
{
yield return("You must account for the entire order amount");
}
}
}