/// <summary>
/// Parse input file into separate trip expenses and generate filename of output
/// </summary>
/// <param name="inputPath"></param>
private void ParseInputFile(String inputPath)
{
OuputFilePath = GetOutputFileName(inputPath);
string[] lines = System.IO.File.ReadAllLines(inputPath);
int cur = 0;
int numberOfPurchasingRecordsInOneReceipt = 0;
// headCount is the number of participants in each trip.
int headCount = Int32.Parse(lines[cur++]);
TripExpense tripExpense = new TripExpense();
while (headCount > 0)
{
numberOfPurchasingRecordsInOneReceipt = Int32.Parse(lines[cur++]);
Receipt receipt = new Receipt();
while (numberOfPurchasingRecordsInOneReceipt > 0)
{
numberOfPurchasingRecordsInOneReceipt--;
receipt.AddNewExpense(double.Parse(lines[cur++], System.Globalization.CultureInfo.InvariantCulture));
}
// Add total amount paid by this participant into trip's ledger.
// Then, move to the next participant's receipt.
headCount--;
tripExpense.AddNewExpense(receipt.GetSum());
if (headCount == 0)
{
// All receipts of a particular trip have been consolidated, so add this trip's expense into the main bill's ledger.
// Then, move to the next trip's expense.
headCount = Int32.Parse(lines[cur++]);
allTripBills.Add(tripExpense);
tripExpense = new TripExpense();
}
}
}
/// <summary>
/// Add a new trip expense into bills ledger. A trip expense consists of amounts owed by each participant.
/// </summary>
/// <param name="tripExp"></param>
private void AddNewTripExpense(TripExpense tripExp)
{
allTripBills.Add(tripExp);
}