public int FindLargestRegisterValue(string filePath)
{
List <Register> registers = new List <Register>();
string line;
StreamReader file = new StreamReader(filePath);
// Iterate over each line in the input
while ((line = file.ReadLine()) != null)
{
RegisterCommandAttributes attribs = new RegisterCommandAttributes(line);
// if register does not exist, add it first
if (!registers.Any(r => r.Name == attribs.RegisterName))
{
registers.Add(new Register(attribs.RegisterName));
}
if (!registers.Any(r => r.Name == attribs.ConditionName))
{
registers.Add(new Register(attribs.ConditionName));
}
IRegisterCommand command = new RegisterCommandBuilder().Build(attribs);
if (command.IsApplicable(registers))
{
Register appliesTo = command.AppliesToRegister(registers);
command.Execute(appliesTo);
}
}
file.Close();
int largestValue = registers.OrderByDescending(r => r.Value).First().Value;
return(largestValue);
}
public IRegisterCommand Build(RegisterCommandAttributes attribs)
{
IRegisterCommand createdCommand;
switch (attribs.CommandName)
{
case "inc":
createdCommand = new IncreaseRegisterCommand(attribs);
break;
case "dec":
createdCommand = new DecreaseRegisterCommand(attribs);
break;
default:
throw new ArgumentException("Command requested not defined");
}
return(createdCommand);
}
