/// <summary>
/// Rent a car
/// </summary>
/// <param name="licencePlate">The licence plate of the car to rent</param>
/// <param name="rentalDate">The start date for the rental</param>
/// <returns>true if the car was available for renting, false otherwise.</returns>
public bool RentCar(string licencePlate, SimpleDate rentalDate)
{
// Try to find the car with the given licence plate. Is it a Sedan?
Sedan foundSedan = null;
foreach (Sedan sedan in sedans)
{
if (sedan.LicencePlate == licencePlate)
{
foundSedan = sedan;
break;
}
}
// Was a sedan with the given licene plate found? Then try to rent it.
if (foundSedan != null)
{
return(foundSedan.Rent(rentalDate));
}
// No car found yet with the given licence plate.
// Try to find the car with the given licence plate. Is it a Limousine?
Limousine foundLimousine = null;
foreach (Limousine limousine in limousines)
{
if (limousine.LicencePlate == licencePlate)
{
foundLimousine = limousine;
break;
}
}
// Was a limousine with the given licene plate found? Then try to rent it.
if (foundLimousine != null)
{
return(foundLimousine.Rent(rentalDate));
}
// No car found yet with the given licence plate.
// Try to find the car with the given licence plate. Is it a Truck?
Truck foundTruck = null;
foreach (Truck truck in trucks)
{
if (truck.LicencePlate == licencePlate)
{
foundTruck = truck;
break;
}
}
// Was a truck with the given licene plate found? Then try to rent it.
if (foundTruck != null)
{
return(foundTruck.Rent(rentalDate));
}
return(false); // No Sedan nor Limousine nor Truck was found with the given licence plate.
}
/// <summary>
/// Return a car using the licence plate number
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void returnCarButton_Click(object sender, EventArgs e)
{
string licencePlate = licencePlateTextBox.Text;
int kilometers;
if (Int32.TryParse(returnKilometersTextBox.Text, out kilometers))
{
SimpleDate date = new SimpleDate(returnDateTimePicker.Value.Day,
returnDateTimePicker.Value.Month,
returnDateTimePicker.Value.Year);
decimal price = administration.ReturnCar(licencePlate, date, kilometers);
if (price >= 0)
{
MessageBox.Show("Please Pay: '" + price + " credits'.");
UpdateAvailableCarListAndRentedCarLists();
}
else
{
MessageBox.Show("No Car with licence plate: '" + licencePlate
+ "'\nor the kilometers are less then when rented\nor the return date is invalid (before rental date)\nor the car was not rented and cannot be returned.");
}
}
else
{
MessageBox.Show("The licence plate and/or kilometers are entered wrong format.");
}
}
/// <summary>
/// Rents the truck. The truck will be unavailable after renting.
/// It will be avaiable again after returning the truck.
///
/// Only available trucks can be rented.
/// </summary>
/// <param name="rentalDate">The date on which the truck is rented.</param>
/// <returns>true if the truck was available, false otherwise.</returns>
public bool Rent(SimpleDate rentalDate)
{
if (IsAvailable)
{
RentalDate = rentalDate;
return(true);
}
return(false);
}
/// <summary>
/// Returns a rented truck and calculate the costs of the rental.
/// Only rented trucks can be returned.
/// </summary>
/// <param name="returnDate">The date on which the truck is returned.</param>
/// <param name="kilometers">The total number of kilometers on the counter.</param>
/// <returns>The cost of the rental,
/// or a number less than zero when:
/// - the truck was not rented (so it could not be returned)
/// - the return date is before the rental date (so wrong return date was entered)
/// - the number of kilometers when returned is less then at the start of the rental.
/// Please note that returning as number less than zero for error situations is NOT(!!!)
/// clean coding in this case. Later on you will learn to do this in a better fashion (Exceptions!)
/// </returns>
public decimal Return(SimpleDate returnDate, int kilometers)
{
if (!IsAvailable)
{
int daysRented = RentalDate.DaysDifference(returnDate);
int kilometersDriven = kilometers - Kilometers;
if (daysRented >= 0 && kilometersDriven >= 0)
{
RentalDate = null; // makes the truck available for renting again
Kilometers = kilometers; // update kms for the next rental
return(CalculateRentalCosts(daysRented, kilometersDriven));
}
}
return(-1);
}
/// <summary>
/// Rent the car using the licence plate
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void rentCarButton_Click(object sender, EventArgs e)
{
string licencePlate = licencePlateTextBox.Text;
SimpleDate date = new SimpleDate(rentalDateTimePicker.Value.Day,
rentalDateTimePicker.Value.Month,
rentalDateTimePicker.Value.Year);
bool isRented = administration.RentCar(licencePlate, date);
if (isRented)
{
UpdateAvailableCarListAndRentedCarLists();
}
else
{
MessageBox.Show("There's no car with licence plate: '"
+ licencePlate + "' or the car is already rented.");
}
}
/// <summary>
/// Get the tumber of days between this objects date and the given date.
/// </summary>
/// <param name="date">The end date.</param>
/// <returns>The number of days between this date and endDate.</returns>
public int DaysDifference(SimpleDate date)
{
TimeSpan timespan = date.date.Subtract(this.date);
return(timespan.Days);
}