public static RecurrenceValue Parse(CalendarReader reader)
{
RecurrenceFrequency?freq = null;
int? interval = null;
List <int> byMinute = null;
List <int> byHour = null;
List <WeekDayNum> byDay = null;
List <int> bySetPos = null;
List <MonthOfYear> byMonth = null;
do
{
var param = CalendarPropertyParameter.ReadFrom(reader);
var name = param.Name.ToUpperInvariant();
switch (name)
{
case "FREQ":
if (freq.HasValue)
{
throw new Exception("Multiple FREQ rule parts occured");
}
freq = ParseFrequency(param.Value);
break;
case "INTERVAL":
if (interval.HasValue)
{
throw new Exception("Multiple INTERVAL rule parts occured");
}
interval = int.Parse(param.Value);
break;
case "BYMINUTE":
if (byMinute != null)
{
throw new Exception("Multiple BYMINUTE rule parts occured");
}
if (param.Values.Count == 0)
{
throw new Exception("BYMINUTE values expected");
}
byMinute = param.Values.Select(int.Parse).ToList();
break;
case "BYHOUR":
if (byHour != null)
{
throw new Exception("Multiple BYHOUR rule parts occured");
}
if (param.Values.Count == 0)
{
throw new Exception("BYHOUR values expected");
}
byHour = param.Values.Select(int.Parse).ToList();
break;
case "BYDAY":
if (byDay != null)
{
throw new Exception("Multiple BYDAY rule parts occured");
}
if (param.Values.Count == 0)
{
throw new Exception("BYDAY values expected");
}
byDay = param.Values.Select(WeekDayNum.Parse).ToList();
break;
case "BYMONTH":
if (byMonth != null)
{
throw new Exception("Multiple BYMONTH rule parts occured");
}
if (param.Values.Count == 0)
{
throw new Exception("BYMONTH values expected");
}
byMonth = param.Values.Select(item => (MonthOfYear)int.Parse(item)).ToList();
break;
case "BYSETPOS":
if (bySetPos != null)
{
throw new Exception("Multiple BYSETPOS rule parts occured");
}
if (param.Values.Count == 0)
{
throw new Exception("BYSETPOS values expected");
}
bySetPos = param.Values.Select(int.Parse).ToList();
break;
default:
throw new Exception("Unknown rule part " + name);
}
} while (reader.PeekOrRead(';'));
if (!freq.HasValue)
{
throw new Exception("FREQ rule part is required");
}
return(new RecurrenceValue {
Frequency = freq.Value,
Interval = interval,
ByMinute = byMinute,
ByHour = byHour,
ByDay = byDay,
ByMonth = byMonth,
BySetPos = bySetPos
});
}
