node-boleto/lib/formatters.js

exports.capitalize = function(string) {
  return string.charAt(0).toUpperCase() + string.slice(1);
}

exports.addTrailingZeros = function(string, length) {
  string = string.toString();

  while(string.length < length) {
	string = "0" + string;
  }

  return string;
}

exports.formatAmount = function(amount) {
  amount = amount.toString();
  var cents = exports.addTrailingZeros(amount.substring(amount.length - 2, amount.length), 2);
  var integers = exports.addTrailingZeros(amount.substring(0, amount.length - 2), 1);

  var newIntegers = "";

  for(var i = 0; i < integers.length; i++) {
	if(i > 0 && (integers.length - i) % 3 == 0) newIntegers += ".";
	newIntegers += integers[i];
  }

  return "R$ " + newIntegers + "," + cents;
}

exports.formatDate = function(date) {
  return exports.addTrailingZeros(date.getDate(), 2) + "/" +
	exports.addTrailingZeros(date.getMonth() + 1, 2) + "/" + date.getFullYear();
}

exports.mod11 = function(num, base, r) {
  if(!base) base = 9;
  if(!r) r = 0;

  var soma = 0;
  var fator = 2;

  for(var i = num.length - 1; i >= 0; i--) {
	var parcial = parseInt(num[i]) * fator;
	soma += parcial;

	if(fator == base) {
	  fator = 1;
	}

	fator++;
  }

  if(r == 0) {
	soma *= 10;
	var digito = soma % 11;
	return digito == 10 ? 0 : digito;
  } else if(r == 1) {
	return soma % 11;
  }
}

exports.mod10 = function(num) {
  var total = 0;
  var fator = 2;
  
  for(var i = num.length - 1; i >= 0; i--) {
	var temp = (parseInt(num[i]) * fator).toString();
	var tempSum = 0;
	for(var j = 0; j < temp.length; j++) {
	  tempSum += parseInt(temp[j]);
	}
	total += tempSum;
	fator = (fator == 2) ? 1 : 2;
  }

  var resto = total % 10;
  return (resto == 0) ? 0 : (10 - resto);
}

exports.fatorVencimento = function(date) {
  return exports.addTrailingZeros(Math.floor((date.getTime() - new Date(1997, 9, 7).getTime())/(24 * 3600 * 1000)), 4);
}

exports.dateFromEdiDate = function(ediDate) {
  return new Date(parseInt(ediDate.substring(4, 8)), parseInt(ediDate.substring(2, 4)) - 1, parseInt(ediDate.substring(0, 2)));
}

exports.removeTrailingZeros = function(string) {
  while(string.charAt(0) == '0') {
	string = string.substring(1, string.length);
  }

  return string;
}

exports.htmlString = function(str) {
  return str ? str.replace(/\n/g, '<br/>') : str;
}