public Schedule Parse(string parseThis)
{
var schedule = new Schedule();
var parts = new PartsTraverser(ParseParts(parseThis));
ParseBigLoop(parts, schedule);
return schedule;
}
public Schedule Parse(string parseThis)
{
var schedule = new Schedule();
var parts = new PartsTraverser(ParseParts(parseThis));
ParseBigLoop(parts, schedule);
return(schedule);
}
private Clock ParseClock(PartsTraverser parts)
{
var part = parts.NextPart();
var hour = int.Parse(part);
parts.SkipAnyOrFail(":");
part = parts.NextPart();
var minute = int.Parse(part);
return(new Clock {
Hour = hour, Minute = minute
});
}
private List <Clock> ParseTimes(PartsTraverser parts)
{
var times = new List <Clock>();
if (parts.Peek("hour"))
{
times = Enumerable.Range(0, 24).Select(x => new Clock(x, 0)).ToList();
}
else
{
parts.SkipAnyOrFail("@", "at");
do
{
times.Add(ParseClock(parts));
}while (parts.NextIf("and"));
}
return(times);
}
private void ParseBigLoop(PartsTraverser parts, Schedule schedule)
{
var days = new List <Tuple <int, Interval> >();
do
{
if (parts.NextIf("every"))
{
if (parts.NextIf("day") || parts.Peek("hour"))
{
days.AddRange(
new[]
{
Tuple.Create(0, Interval.Week), Tuple.Create(1, Interval.Week),
Tuple.Create(2, Interval.Week), Tuple.Create(3, Interval.Week),
Tuple.Create(4, Interval.Week), Tuple.Create(5, Interval.Week),
Tuple.Create(6, Interval.Week)
});
}
else // weekday
{
do
{
var nextDay = parts.NextPart();
days.Add(Tuple.Create(Array.IndexOf(_days, nextDay), Interval.Week));
}while (parts.NextIf("and"));
}
}
else if (_days.Any(x => x == parts.Peek()))
{
do
{
var nextDay = parts.NextPart();
days.Add(Tuple.Create(Array.IndexOf(_days, nextDay), Interval.Week));
parts.SkipAnyOrFail("s");
}while (parts.NextIf("and"));
}
else if (IsNumeric(parts.Peek()) || parts.Peek("last"))
{
var scopeDays = new List <int>();
do
{
if (parts.NextIf("last"))
{
scopeDays.Add(-1);
}
else
{
var nth = int.Parse(parts.NextPart()) - 1;
parts.SkipIf("st", "nd", "rd", "th");
if (parts.NextIf("last"))
{
nth = -1 - nth;
}
scopeDays.Add(nth);
}
}while (parts.NextIf("and"));
parts.SkipAnyOrFail("day");
parts.SkipAnyOrFail("every");
if (parts.NextIf("week"))
{
scopeDays.ForEach(x => days.Add(Tuple.Create(x, Interval.Week)));
}
else if (parts.NextIf("month"))
{
scopeDays.ForEach(x => days.Add(Tuple.Create(x, Interval.Month)));
}
else if (parts.NextIf("year"))
{
scopeDays.ForEach(x => days.Add(Tuple.Create(x, Interval.Year)));
}
else
{
throw new ParsingException("Unexpected token " + parts.Peek() + ". Expected week, month or year.");
}
}
}while (parts.NextIf("and"));
days = days.Distinct().ToList();
schedule.Times = ParseTimes(parts);
schedule.Days = days;
}
private void ParseBigLoop(PartsTraverser parts, Schedule schedule)
{
var days = new List<Tuple<int, Interval>>();
do
{
if (parts.NextIf("every"))
{
if (parts.NextIf("day") || parts.Peek("hour"))
{
days.AddRange(
new[]
{
Tuple.Create(0, Interval.Week), Tuple.Create(1, Interval.Week),
Tuple.Create(2, Interval.Week), Tuple.Create(3, Interval.Week),
Tuple.Create(4, Interval.Week), Tuple.Create(5, Interval.Week),
Tuple.Create(6, Interval.Week)
});
}
else // weekday
{
do
{
var nextDay = parts.NextPart();
days.Add(Tuple.Create(Array.IndexOf(_days, nextDay), Interval.Week));
}
while (parts.NextIf("and"));
}
}
else if (_days.Any(x => x == parts.Peek()))
{
do
{
var nextDay = parts.NextPart();
days.Add(Tuple.Create(Array.IndexOf(_days, nextDay), Interval.Week));
parts.SkipAnyOrFail("s");
}
while (parts.NextIf("and"));
}
else if (IsNumeric(parts.Peek()) || parts.Peek("last"))
{
var scopeDays = new List<int>();
do
{
if (parts.NextIf("last"))
{
scopeDays.Add(-1);
}
else
{
var nth = int.Parse(parts.NextPart()) - 1;
parts.SkipIf("st", "nd", "rd", "th");
if (parts.NextIf("last"))
{
nth = -1 - nth;
}
scopeDays.Add(nth);
}
}
while (parts.NextIf("and"));
parts.SkipAnyOrFail("day");
parts.SkipAnyOrFail("every");
if (parts.NextIf("week"))
{
scopeDays.ForEach(x => days.Add(Tuple.Create(x, Interval.Week)));
}
else if (parts.NextIf("month"))
{
scopeDays.ForEach(x => days.Add(Tuple.Create(x, Interval.Month)));
}
else if (parts.NextIf("year"))
{
scopeDays.ForEach(x => days.Add(Tuple.Create(x, Interval.Year)));
}
else
{
throw new ParsingException("Unexpected token " + parts.Peek() + ". Expected week, month or year.");
}
}
}
while (parts.NextIf("and"));
days = days.Distinct().ToList();
schedule.Times = ParseTimes(parts);
schedule.Days = days;
}
private List<Clock> ParseTimes(PartsTraverser parts)
{
var times = new List<Clock>();
if (parts.Peek("hour"))
{
times = Enumerable.Range(0, 24).Select(x => new Clock(x, 0)).ToList();
}
else
{
parts.SkipAnyOrFail("@", "at");
do
{
times.Add(ParseClock(parts));
}
while (parts.NextIf("and"));
}
return times;
}
private Clock ParseClock(PartsTraverser parts)
{
var part = parts.NextPart();
var hour = int.Parse(part);
parts.SkipAnyOrFail(":");
part = parts.NextPart();
var minute = int.Parse(part);
return new Clock { Hour = hour, Minute = minute };
}