public static ExpenseOrder ChooseOrder(Database.Database db)
{
if (db is null)
{
throw new ArgumentNullException(nameof(db));
}
ExpenseOrder[] orders = db.GetOrders().OrderBy(x => x.OrderDate.ToFileTimeUtc()).ToArray();
Console.Clear();
const int numberPerPage = 5;
int numberOfPages = orders.Length / numberPerPage;
int currentPageIndex = 0;
ExpenseOrder retVal = null;
while (retVal == null)
{
if (currentPageIndex < 0)
{
currentPageIndex = 0;
}
if (currentPageIndex > numberOfPages)
{
currentPageIndex = numberOfPages;
}
Console.Clear();
ExpenseOrder[] currentPage = orders.Skip(currentPageIndex * numberPerPage).Take(numberPerPage).ToArray();
Console.WriteLine($"Displaying {currentPage.Length} of {orders.Length} orders.");
for (int i = 0; i < currentPage.Length; i++)
{
ExpenseOrder order = currentPage[i];
Console.WriteLine($"{i + 1} : Order from {order.OrderDate.ToShortDateString()}");
}
string resp = ConsoleUtilities.AskUser("(n)ext page, (p)rev page, (q)uit, or press a number to select an order.");
if (resp == "n")
{
currentPageIndex++;
}
else if (resp == "p")
{
currentPageIndex--;
}
else if (resp == "q")
{
return(null);
}
else if (int.TryParse(resp, out int selectedItemIndex) &&
selectedItemIndex > 0 &&
selectedItemIndex <= currentPage.Length)
{
return(currentPage.ToArray()[selectedItemIndex - 1]);
}
}
return(null);
}