module ActionView
  module Helpers
    module NumberHelper
      def number_to_currency(number, options = {})
        options  = options.stringify_keys
        precision = options["precision"] || 2
        unit    = options["unit"] || "$"
        separator = precision > 0 ? options["separator"] || "." : ""
        delimiter = options["delimiter"] || ","

        begin
          parts = number_with_precision(number, precision).split('.')
          delimitered_number = number_with_delimiter(parts[0], delimiter) + separator + parts[1].to_s
          if Float(number) >= 0.00
            unit + delimitered_number
          else
            #'(' + unit + delimitered_number.gsub(/^-/, '') + ')'
            '-' + unit + delimitered_number.gsub(/^-/, '')
          end
        rescue
          number
        end
      end
    end
  end
end

function FormataReais(fld, milSep, decSep, e) {
		var sep = 0;
		var key = '';
		var i = j = 0;
		var len = len2 = 0;
		var strCheck = '0123456789';
		var aux = aux2 = '';
		var whichCode = (window.Event) ? e.which : e.keyCode;
		if (whichCode == 13) return true;
	 	key = String.fromCharCode(whichCode);  // Valor para o código da Chave
		if (strCheck.indexOf(key) == -1) return false;  // Chave inválida
		len = fld.value.length;
		for(i = 0; i < len; i++)
		if ((fld.value.charAt(i) != '0') && (fld.value.charAt(i) != decSep)) 
 		break;
 		aux = '';
 		for(; i < len; i++)
		if (strCheck.indexOf(fld.value.charAt(i))!=-1) aux += fld.value.charAt(i);
		aux += key;
		len = aux.length;
		if (len == 0) fld.value = '';
		if (len == 1) fld.value = '0'+ decSep + '0' + aux;
		if (len == 2) fld.value = '0'+ decSep + aux;
		if (len > 2) {
			aux2 = '';
 			for (j = 0, i = len - 3; i >= 0; i--) {
				if (j == 3) {
					aux2 += milSep;
					j = 0;
				}
				aux2 += aux.charAt(i);
 				j++;
			}
			fld.value = '';
			len2 = aux2.length;
			for (i = len2 - 1; i >= 0; i--)
			fld.value += aux2.charAt(i);
			fld.value += decSep + aux.substr(len - 2, len);
		}
		return false;
}

onkeypress="return(FormataReais(this,'.',',',event))"

def number_to_currency_with_cents(number, options = {})
    options = options.stringify_keys
    precision = options.delete('precision') { 2 }
    unit = options.delete('unit') { '$' }
    fractional_unit = options.delete('fractional_unit') { '¢' }
    separator = options.delete('separator') { '.' }
    delimiter = options.delete('delimiter') { ',' }
    separator = '' unless precision > 0
    begin
        fraction = number.abs % 1.0
        body = number.floor
        if body != 0 || body == 0 && fraction == 0 then
            parts = number_with_precision(number, precision).split('.')
            unit + number_with_delimiter(parts[0], delimiter) + separator + parts[1].to_s
        else
            (fraction * 100).to_i.to_s + fractional_unit
        end
    rescue
        number
    end
end

function dollar_format($amount) {
  $new_amount = "\$".sprintf("%.2f",$amount);
  return $new_amount;
}

//+ Jonas Raoni Soares Silva
//@ http://jsfromhell.com/number/fmt-money [v1.1]

Number.prototype.formatMoney = function(c, d, t){
	var n = this, c = isNaN(c = Math.abs(c)) ? 2 : c, d = d == undefined ? "," : d, t = t == undefined ? "." : t, s = n < 0 ? "-" : "", i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "", j = (j = i.length) > 3 ? j % 3 : 0;
	return s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
};

(123456789.12345).formatMoney(2, '.', ',');