///-------------------------------------------------------------------------------------------------
/// <summary> A DateTime extension method that returns list of events on date. </summary>
///
/// <param name="date"> The date. </param>
/// <param name="includeWorkdays"> True to include, false to include workday events. </param>
/// <param name="includeDaysOff"> True to disable, false to include days off events. </param>
///
/// <returns> An ImmutableArray<string> </returns>
///
/// <example>
/// <code>
/// CalendarDateTime.AddYearlyDateEvent("myBirthday", true, 5, 20, false, false);
/// var aDate = new DateTime(2018, 5, 20, 5, 30, 0);
/// var events = aDate.EventsOnDate(true, true);
/// // events = [0] = "myBirthday"
/// </code>
/// </example>
///-------------------------------------------------------------------------------------------------
public static ImmutableArray <string> EventsOnDate(this DateTime date, bool includeWorkdays, bool includeDaysOff)
{
date = date.Date;
var events = new List <string>();
var yearlyEvents = YearlyEventsDictionary
.Where(v => date.IsBetweenEqual(v.Value.DateStart, v.Value.DateEnd) &&
(v.Value.DayOff && includeDaysOff || v.Value.WorkDay && includeWorkdays) &&
v.Value.Date(date.Year) == date)
.Select(k => k.Key);
var monthlyEvents = MonthlyEventsDictionary
.Where(v => date.IsBetweenEqual(v.Value.DateStart, v.Value.DateEnd) &&
(v.Value.DayOff && includeDaysOff || v.Value.WorkDay && includeWorkdays) &&
v.Value.Date(date.Year, date.Month) == date)
.Select(k => k.Key);
var weeklyEvents = WeeklyEventsDictionary
.Where(v => date.IsBetweenEqual(v.Value.DateStart, v.Value.DateEnd) &&
(v.Value.DayOff && includeDaysOff || v.Value.WorkDay && includeWorkdays) &&
v.Value.IsEventDay(date))
.Select(k => k.Key);
var dateEvents = DateEventsDictionary
.Where(v => (v.Value.DayOff && includeDaysOff || v.Value.WorkDay && includeWorkdays) &&
v.Value.Date == date)
.Select(k => k.Key);
events.AddRange(yearlyEvents);
events.AddRange(monthlyEvents);
events.AddRange(weeklyEvents);
events.AddRange(dateEvents);
return(events.ToImmutableArray());
}
