private bool IsOrderValid(string sodaToOrder, out string invalidOrderReason)
{
invalidOrderReason = "";
var validationResult = true;
if (Sodas.Any(s => s.Name == sodaToOrder))
{
//Ouery for the soda ordered.
var sodaQuery = from soda in Sodas
where soda.Name == sodaToOrder
select new Soda {
Price = soda.Price, Nr = soda.Nr, Name = soda.Name
};
var orderedSoda = sodaQuery.First();
if (orderedSoda.Price > Money)
{
invalidOrderReason = "Insert " + (orderedSoda.Price - Money) + " more";
validationResult = false;
}
else if (orderedSoda.Nr < 1)
{
invalidOrderReason = "No " + orderedSoda.Name + " left in the machine";
validationResult = false;
}
}
else
{
validationResult = false;
invalidOrderReason = "This soda is not available in the machine";
}
return(validationResult);
}
public void Order(string soda)
{
string invalidResult = "";
if (IsOrderValid(soda, out invalidResult))
{
//Get the soda to order from Sodas
var sodaQuery = from sodaItem in Sodas
where sodaItem.Name == soda
select new Soda {
Price = sodaItem.Price, Nr = sodaItem.Nr, Name = sodaItem.Name
};
var sodaToOrder = sodaQuery.First();
//Place order by reducing the Nr of that soda item
Sodas.RemoveAll(s => s.Name == sodaToOrder.Name);
Sodas.Add(new Soda {
Name = sodaToOrder.Name, Nr = sodaToOrder.Nr - 1, Price = sodaToOrder.Price
});
Console.WriteLine("Giving out a " + sodaToOrder.Name);
//Give out change
var change = Money - sodaToOrder.Price;
Money = 0;
Console.WriteLine("Returning " + change + " in change");
}
else
{
Console.WriteLine(invalidResult);
}
}