//assign a customer to this register
public void AssignCustomerToThisRegister(Customer customer)
{
// if we have customer already in this register we are calculating the total time taken for this register to process this customer
if (Customers != null && Customers.Any())
{
if (Customers.Last().ElapsedTimeToCompleteThisCustomer > customer.ArrivalTime)
{
customer.ElapsedTimeToCompleteThisCustomer = Customers.Last().ElapsedTimeToCompleteThisCustomer + (TimeTakenToProcessEachItem * customer.Items);
}
else
{
customer.ElapsedTimeToCompleteThisCustomer = customer.ArrivalTime + (TimeTakenToProcessEachItem * customer.Items);
}
}
else
{
customer.ElapsedTimeToCompleteThisCustomer = customer.ArrivalTime + (customer.Items * TimeTakenToProcessEachItem) - 1;
}
Customers.Add(customer);
}
public static void ProcessFile(StreamReader file)
{
var noOfRegisters = 0;
int counter = 0;
string line;
while ((line = file.ReadLine()) != null)
{
if (counter == 0)
{
noOfRegisters = int.Parse(line);
}
else
{
var customerInput = line.Split(' ');
var customer = new Customer();
customer.CustomerType = customerInput[0].ToString();
customer.ArrivalTime = Convert.ToInt32(customerInput[1]);
customer.Items = Convert.ToInt32(customerInput[2]);
customerList.Add(customer);
}
//Console.WriteLine(line);
counter++;
}
file.Close();
// building the registers
for (int i = 1; i <= noOfRegisters; i++)
{
int timeTakenForItems = 1;
if (i == noOfRegisters) // for last register we will set the time to two minutes
{
timeTakenForItems = 2;
}
registerList.Add(new Register()
{
Customers = new List<Customer>(),
TimeTakenToProcessEachItem = timeTakenForItems
});
}
}
private static void AssignBTypeCustomerToRegister(Customer customer)
{
registerList.OrderBy(x => x.LastCustomerItemsForGivenMinute(customer.ArrivalTime)).FirstOrDefault().AssignCustomerToThisRegister(customer);
customerList.Remove(customer);
}
private static void ProcessGivenCustomer(Customer customer)
{
if (customer.CustomerType == "A")
{
AssignATypeCustomerToRegister(customer);
}
else if (customer.CustomerType == "B")
{
//Customer Type B looks at the last customer in each line, and always chooses to be behind the customer with the fewest number
// of items left to check out, regardless of how many other customers are in the line or how many items they have.
// Customer Type B will always choose an empty line before a line with any customers in it.
AssignBTypeCustomerToRegister(customer);
}
}
private static void AssignATypeCustomerToRegister(Customer customer)
{
// find and assign the customer to the register
registerList.OrderBy(x => x.CurrentCustomerCountForGivenMinute(customer.ArrivalTime)).FirstOrDefault().AssignCustomerToThisRegister(customer);
// remove the customer for the customer list
customerList.Remove(customer);
}