// Roman Numerals Column

function OnInit(initData)
{
	initData.name = "Roman Numerals Column";
	initData.desc = "A column showing file names with roman numerals converted to numbers";
	initData.version = "1.0";
	initData.default_enable = true;

	var col = initData.AddColumn();
	col.name = "RomanNumerals";
	col.method = "OnRomanNumerals";
	col.label = "Roman Numerals";
	col.justify = "left";
	col.autogroup = true;
	col.namerefresh = true;
	col.autorefresh = false;
}

// Implement the RomanNumerals column
function OnRomanNumerals(scriptColData)
{
	if (scriptColData.col != "RomanNumerals")
		return;

	scriptColData.value = deromWords(scriptColData.item.name_stem) + scriptColData.item.ext;
}

function deromWords(str) {
	var out = "";
	var num;
	var words = str.split(" ");
	for (var widx in words)
	{
		if (widx > 0)
			out += " ";
		num = deromanize(words[widx]);
		if (num == 0)
			out += words[widx];
		else
			out += num;
	}
	return out;
}

function deromanize(str)
{
	var str = str.toUpperCase(),
		validator = /^M*(?:D?C{0,3}|C[MD])(?:L?X{0,3}|X[CL])(?:V?I{0,3}|I[XV])$/,
		token = /[MDLV]|C[MD]?|X[CL]?|I[XV]?/g,
		key = {M:1000,CM:900,D:500,CD:400,C:100,XC:90,L:50,XL:40,X:10,IX:9,V:5,IV:4,I:1},
		num = 0, m;
	if (!(str && validator.test(str)))
		return 0;
	while (m = token.exec(str))
		num += key[m[0]];
	if (num > 0)
	{
		num = String(num);
		while (num.length < 4)
			num = "0" + num;
	}
	return num;
}