public void InvolveEveryone()
{
Recalculate();
var alreadyPresentDebtors = Debtors.Where(t => t.UserId != null).Select(t => t.UserId).ToArray();
var missingDebtors = AllUsers.Where(t => alreadyPresentDebtors.All(d => d != t.Id)).ToArray();
var missingTransactions = missingDebtors.Select(t => new TransactionData()
{
UserId = t.Id, Name = t.Name, Amount = AmountDifference / missingDebtors.Count()
});
Debtors.AddRange(missingTransactions);
DebtorsChanged();
}
/// <summary>
/// Recalculates the remaining amount.
/// </summary>
public void Recalculate()
{
AmountDifference = (Payers.Where(p => p.Amount != null).Sum(p => p.Amount) ?? 0) - (Debtors.Where(p => p.Amount != null).Sum(p => p.Amount) ?? 0);
}