/**
     * replaces a placeholders on an arguments. <br>For example: <br>"parseArg(a, b);" <br>with a equal to <br><i>"lp user %arg_0%meta setprefix %arg_1%"</i><br>and
     * b is the array with elements: <br>"adffds", "fdsd" <br>will replace on <br><i>lp user adffds meta setprefix fdsd</i>
     * @param str - string to replace from
     * @param arg - arguments to which placeholders will replace
     * @return parse with replaced placeholders
     */
    private static String parseArg(String str, String... args)
    {
        if (args.length < 1) return str;
        boolean begin = false;
        int first = -1;
        int end = -1;
        int j = -1;
        String tmp = "";
        for (int i = 0; i< str.length(); i++)
        {
            if (str.charAt(i) == '%')
            {
                if (begin)
                {
                    end = i;
                    begin = false;
                    if (tmp.equals(""))
                    {
                        str = str.subSequence(0, i-1).toString().concat(str.subSequence(i, str.length()).toString());
                        i--;
                        continue;
                    }
                    try
                    {
                        String[] s = tmp.split("_");
                        if (s[0].equals("arg"))
                        {
                            j = Integer.parseInt(s[1]);
                            String str1 = str.subSequence(0, first).toString();
                            str1 = str1.concat(args[j]);
                            str = str1.concat(str.subSequence(end+1, str.length()).toString());
                            i = str1.length()-1;
                        }
                    }
                    catch(ArrayIndexOutOfBoundsException e) {}
                    continue;
                }
                begin = true;

                first = i;
                tmp = "";
                i++;
            }

            if (begin)
            {
                while (str.charAt(i) != '%')
                {
                    tmp += str.charAt(i);
                    i++;
                    if (i >= str.length()) return str;
                }i--;


            }
        }
        return str;

    }