// Format: how many Credits is [Quantity] [Item]
public bool Solve(string line, Context context, out string answer)
{
if (!line.StartsWith(Constants.StatementQuestion))
{
answer = null;
return(false);
}
string question = line.Substring(Constants.StatementQuestion.Length);
string[] right = question.Split(new[] { Constants.Space }, StringSplitOptions.RemoveEmptyEntries);
string item = right.Last();
int quantity = Roman.Parse(string.Join(Constants.Space, right.Take(right.Length - 1)), context.RomanMapping);
if (!context.ItemPrice.ContainsKey(item))
{
throw new ArgumentException(Constants.ItemNotFound, item);
}
decimal amount = quantity * context.ItemPrice[item];
answer = string.Format("{0}is {1} Credits", question, decimal.ToInt32(amount));
return(true);
}
// Format: [Quantity] [Item] is [Amount] Credits
public bool Parse(string line, Context context)
{
if (line.EndsWith(Constants.QuestionMark))
{
return(false);
}
string[] fields = line.Split(new[] { Constants.ParserDelimiter }, StringSplitOptions.RemoveEmptyEntries);
if (fields.Length != 2)
{
return(false);
}
string[] left = fields[0].Split(new[] { Constants.Space }, StringSplitOptions.RemoveEmptyEntries);
if (left.Length < 2)
{
return(false);
}
string[] right = fields[1].Split(new[] { Constants.Space }, StringSplitOptions.RemoveEmptyEntries);
if (right.Length != 2)
{
return(false);
}
string item = left.Last();
int quantity = Roman.Parse(string.Join(Constants.Space, left.Take(left.Length - 1)), context.RomanMapping);
int amount = int.Parse(right[0]);
decimal price = ((decimal)amount) / quantity;
context.ItemPrice[item] = price;
return(true);
}
// Format: how much is [Quantity]
public bool Solve(string line, Context context, out string answer)
{
if (!line.StartsWith(Constants.DefinitionQuestion))
{
answer = null;
return(false);
}
string right = line.Substring(Constants.DefinitionQuestion.Length);
int quantity = Roman.Parse(right, context.RomanMapping);
answer = string.Format("{0}is {1}", right, quantity);
return(true);
}
public void Parse(int expected, string letter)
{
Assert.AreEqual(expected, Roman.Parse(letter));
}
