public bool MoveNext()
{
RefreshCalculations();
if (CurrentItem == null)
{
return(false);
}
if (_currentPageIndex < 0)
{
return(false);
}
_currentPageIndex++;
CurrentItem = Items.GetOrDefaultByIndex(_currentPageIndex);
if (CurrentItem == null)
{
var lastInner = InnerEquationList.GetOrDefaultByIndex(_currentPageIndex);
if (lastInner != null)
{
CurrentItem = lastInner;
}
}
return(true);
}
public void CreateDefaultCurrentItem()
{
CurrentItem = new BudgetCalculatorItem
{
Equation = this.Equation
};
InnerEquationList.Add(CurrentItem);
}
public bool MoveBack()
{
RefreshCalculations();
if (_currentPageIndex <= 0)
{
return(false);
}
_currentPageIndex--;
if (_currentPageIndex >= Items.Count)
{
return(false);
}
CurrentItem = Items[_currentPageIndex];
return(true);
}
public void AttachEvaluator(BudgetCalculatorItem calculatorItem)
{
CashFlow cashFlow = null;
CashFlowGroup cashFlowGroup = null;
switch (calculatorItem.ValueType)
{
case CalculatorValueType.BudgetTotalRevenuesValue:
calculatorItem.Evaluator = () => Budget.TotalSumOfRevenues;
break;
case CalculatorValueType.BudgetIncomesValue:
case CalculatorValueType.BudgetIncomesValueOfType:
var income = CachedService.GetAllIncomes().FirstOrDefault(x => x.Id == calculatorItem.ForeignId);
calculatorItem.Evaluator = () => GetSumOfBudgetIncomes(income);
break;
case CalculatorValueType.BudgetSavingsValue:
case CalculatorValueType.BudgetSavingsValueOfType:
var saving = CachedService.GetAllSavings().FirstOrDefault(x => x.Id == calculatorItem.ForeignId);
calculatorItem.Evaluator = () => GetSumOfBudgetSavings(saving);
break;
case CalculatorValueType.BudgetExpensesValueOfType:
cashFlow = CachedService.GetAllCashFlows().FirstOrDefault(x => x.Id == calculatorItem.ForeignId);
if (cashFlow == null)
{
throw new NullReferenceException(string.Format("Błąd obliczania równania {0}. Brak kategorii.", calculatorItem.Equation.Name));
}
calculatorItem.Evaluator = () => GetSumOfBudgetExpenses(cashFlow);
break;
case CalculatorValueType.BudgetExpensesWithDescription:
calculatorItem.Evaluator = () => GetSumOfBudgetExpensesWithDescription(calculatorItem.Text);
break;
case CalculatorValueType.CalculatorEquationValue:
var calculatorEquation = Equations.FirstOrDefault(x => x.Id == calculatorItem.ForeignId);
if (calculatorEquation == null)
{
throw new NullReferenceException(string.Format("Nie udało się odnaleźć równania powiązanego z równaniem: {0}", calculatorItem.Name));
}
calculatorItem.Evaluator = () => Calculate(calculatorEquation);
break;
case CalculatorValueType.BudgetPlanValue:
calculatorItem.Evaluator = () => Budget.TotalBudgetPlanValue;
break;
case CalculatorValueType.BudgetPlanValueOfCategory:
cashFlow = CachedService.GetAllCashFlows().FirstOrDefault(x => x.Id == calculatorItem.ForeignId);
if (cashFlow == null)
{
throw new NullReferenceException(string.Format("Błąd obliczania równania {0}. Brak kategorii.", calculatorItem.Equation.Name));
}
calculatorItem.Evaluator = () => GetSumOfBudgetPlansOfCategory(cashFlow);
break;
case CalculatorValueType.BudgetPlanValueOfGroup:
cashFlowGroup = CachedService.GetAllCashFlowGroups().FirstOrDefault(x => x.Id == calculatorItem.ForeignId);
if (cashFlowGroup == null)
{
throw new NullReferenceException(string.Format("Błąd obliczania równania {0}. Brak grupy.", calculatorItem.Equation.Name));
}
calculatorItem.Evaluator = () => GetSumOfBudgetPlansOfGroup(cashFlowGroup);
break;
}
}
