SenseNet.Messaging.Configuration.ParseMonthly C# (CSharp) Method

        internal static void ParseMonthly(string setting)
        {
            MonthlyEnabled = IsNever(setting);
            if (!MonthlyEnabled)
                return;

            if (setting == null)
            {
                MonthlyEvery = true;
                MonthlyLast = false;
                MonthlyDay = 1;
                MonthlyHour = 1;
                MonthlyMinute = 0;
                return;
            }
            var sa = setting.Split(' ');
            if (sa.Length != 3)
                throw ConfigurationExceptionHelper("Monthly", @"Invalid format. Expected: 'Number. Weekday Hour:Minute' (e.g. '1. Sunday 23:00'), 
or 'Last Weekday Hour:Minute' (e.g. 'Last Sunday 23:00'), or 'Every Day. Hour:Minute' (e.g. 'Every 10. 23:10')");

            var firstWord = sa[0].ToLower();
            if (firstWord == "every")
            {
                // Every 10, 23:10
                Configuration.MonthlyEvery = true;
                Configuration.MonthlyLast = false;
                if (sa[1][sa[1].Length - 1] != ',')
                    throw ConfigurationExceptionHelper("Monthly", @"Missing ',' after the day number. Valid format is: 'Every Day. Hour:Minute' (e.g. 'Every 10, 23:10')");
                if (!Int32.TryParse(sa[1].TrimEnd(','), out _monthlyDay))
                    throw ConfigurationExceptionHelper("Monthly", @"Invalid day number. Expected: 'Every Day, Hour:Minute' (e.g. 'Every 10, 23:10')");
                if (MonthlyDay < 1 || MonthlyDay > 31)
                    throw ConfigurationExceptionHelper("Monthly", "Day is out of range: 1-31.");
            }
            else if (firstWord == "last")
            {
                // Last Sunday 23:10
                Configuration.MonthlyEvery = false;
                Configuration.MonthlyLast = true;
                ParseWeekday(sa[1], "Monthly", out _monthlyWeekDay);
            }
            else
            {
                // 3th Sunday 23:10
                Configuration.MonthlyEvery = false;
                Configuration.MonthlyLast = false;
                //if (sa[0][sa[0].Length - 1] != '.')
                //    throw ConfigurationExceptionHelper("Monthly", @"Missing '.' after the week number. Valid format is: 'Number. Weekday Hour:Minute' (e.g. ' 3. Sunday 23:10')");
                //if (!Int32.TryParse(sa[0].TrimEnd('.'), out _monthlyWeek))
                //    throw ConfigurationExceptionHelper("Monthly", @"Invalid week number. Valid format is: 'Number. Weekday Hour:Minute' (e.g. ' 3. Sunday 23:10')");
                //if (MonthlyWeek < 1 || MonthlyWeek > 4)
                //    throw ConfigurationExceptionHelper("Monthly", "Week number is out of range: 1-4.");

                switch (sa[0])
	            {
                    case "1st": _monthlyWeek = 1; break;
                    case "2nd": _monthlyWeek = 2; break;
                    case "3rd": _monthlyWeek = 3; break;
                    case "4th": _monthlyWeek = 4; break;
                    default: throw ConfigurationExceptionHelper("Monthly", "Week number is out of range. Available values: 1st, 2nd, 3rd, 4th");
                }

                ParseWeekday(sa[1], "Monthly", out _monthlyWeekDay);
            }
            ParseTime(sa[2], "Monthly", out _monthlyHour, out _monthlyMinute);
        }
        private static bool IsNever(string setting)