/// <summary>
/// Entry point for program.
/// </summary>
/// <param name="args">The arguments.</param>
public static void Main(string[] args)
{
LoanContext context = null;
LoanCalculator calculator = null;
LoanCalculationOutput output = null;
LoanCalculationOutputStreamWriter writer = null;
try
{
// clean the program name
programName = programName.Replace(".exe", string.Empty);
// check we have the required number of arguments
if(args.Length != EXPECTED_ARGUMENT_COUNT)
{
PrintUsage();
return;
}
string outputFilename = BuildOutputFilename();
context = new LoanContext();
ProcessArguments(args, context);
context.TodaysDate = DateTime.Now;
calculator = new LoanCalculator(context);
output = calculator.Calculate();
writer = new LoanCalculationOutputStreamWriter(context, output);
using(StreamWriter fs = new StreamWriter(new FileStream(outputFilename, FileMode.Create)))
{
writer.WriteOutputHeader(fs, programName);
writer.WritetCalculations(fs);
}
writer.WriteOutputHeader(System.Console.Out, programName);
writer.WritetCalculations(System.Console.Out);
System.Console.WriteLine(string.Format("Ouput written to file '{0}'.", outputFilename));
}
catch (Exception ex)
{
System.Console.WriteLine(string.Format("Exception occurred: {0}", ex.Message));
System.Console.WriteLine(string.Format("\n\n{0}", ex.StackTrace));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="LoanCalculationOutputStreamWriter"/> class.
/// </summary>
/// <param name="context">The context.</param>
/// <param name="output">The output.</param>
public LoanCalculationOutputStreamWriter(LoanContext context, LoanCalculationOutput output)
{
this.context = context;
this.output = output;
}
/// <summary>
/// Processes the arguments.
/// </summary>
/// <param name="args">The arguments.</param>
/// <param name="context">The context.</param>
private static void ProcessArguments(string[] args, LoanContext context)
{
context.StartDate = DateTime.ParseExact(args[0], Constants.DATE_FORMAT, CultureInfo.InvariantCulture);
context.TargetEndDate = DateTime.ParseExact(args[1], Constants.DATE_FORMAT, CultureInfo.InvariantCulture);
context.Balance = double.Parse(args[2]);
context.InterestRate = double.Parse(args[3]);
context.MinRepaymentAmount = double.Parse(args[4]);
context.MinRepaymentDay = int.Parse(args[5]);
context.ExtraRepaymentAmount = double.Parse(args[6]);
context.ExtraRepaymentDay = int.Parse(args[7]);
}
/// <summary>
/// Initializes a new instance of the <see cref="LoanCalculator"/> class.
/// </summary>
/// <param name="context">The context.</param>
public LoanCalculator(LoanContext context)
{
this.context = context;
}