public override bool IsMatch(DateTime day)
{
if (Nth == 0)
{
throw new InvalidOperationException("Nth rule can't count to zero");
}
//first, the current day must match the rule (e.g. 2nd monday after xxx must be a Monday!)
if (!NthRule.IsMatch(day))
{
return(false);
}
var ruleWithAlternatives = NthRule as IHasAlternateRules;
var nthRules = ruleWithAlternatives != null ? ruleWithAlternatives.Rules : new[] { NthRule };
var searchDays = nthRules.SelectMany(crtRule => GetCandidateDays(day, crtRule))
.Distinct() // skip duplicate days
;
return(searchDays.Any(d => ReferencedRule.IsMatch(d))); //in the search interval, there's a day matching the guiding rule
}
public override bool IsMatch(DateTime day)
{
return(StartDate <= day.Date && day.Date <= EndDate &&
ReferencedRule.IsMatch(day));
}
public override bool IsMatch(DateTime day)
{
return(day >= StartDate && ReferencedRule.IsMatch(day));
}
public override bool IsMatch(DateTime day)
{
return(ReferencedRule.IsMatch(day - TimeSpan.FromDays(Nth)));
}
public override bool IsMatch(DateTime day)
{
return(!ReferencedRule.IsMatch(day));
}