///-------------------------------------------------------------------------------------------------
/// <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());
}
///-------------------------------------------------------------------------------------------------
/// <summary>
/// A DateTime extension method that query if 'date' is day off. The days off is configured
/// using the Add-calendar event methods.
/// </summary>
///
/// <param name="date"> The date. </param>
///
/// <returns> True if day off, false if not. </returns>
///
/// <example>
/// <code>
/// // LINQ example.
/// var starting = new DateTime(2018, 1, 1);
/// var ending = new DateTime(2018, 12, 31);
/// var allDates = Enumerable.Range(0, 1 + ending.Subtract(starting).Days).Select(i=> starting.AddDays(i));
///
/// CalendarDateTime.AddYearlyDateEvent("theDate", true, 6, 10, false, false);
/// var result = allDates.Where(d => d.IsDayOff());
/// // result = [0] = {6/10/2018 12:00:00 AM}
/// </code>
/// </example>
///-------------------------------------------------------------------------------------------------
public static bool IsDayOff(this DateTime date)
{
date = date.Date;
var p = YearlyEventsDictionary.Any(v => v.Value.DayOff && v.Value.Date(date.Year) == date);
var m = MonthlyEventsDictionary.Any(v => v.Value.DayOff && v.Value.Date(date.Year, date.Month) == date);
var w = WeeklyEventsDictionary.Any(v => v.Value.DayOff && v.Value.IsEventDay(date));
var a = DateEventsDictionary.Any(v => v.Value.DayOff && v.Value.Date == date);
return(p || m || w || a);
}
///-------------------------------------------------------------------------------------------------
/// <summary> Adds an explicit single date event. </summary>
///
/// <remarks> Adds an explicit single date such as July 18th, 2018 to the calendar. </remarks>
///
/// <exception cref="ArgumentNullException"> Thrown when eventName is null or empty. </exception>
/// <exception cref="ArgumentException"> Thrown when eventName is not unique. </exception>
///
/// <param name="eventName"> Name of the event, must be unique. </param>
/// <param name="dayOff"> True if is a day off (is a workday). </param>
/// <param name="date"> The date Date. </param>
///
/// <example>
/// <code>
/// CalendarDateTime.AddDateEvent("Party Day", true, new DateTime(2018, 18, 5);
/// // Sets July 18, 2018 as a day off.
/// </code>
/// </example>
///-------------------------------------------------------------------------------------------------
public static void AddDateEvent([CanBeNull] string eventName, bool dayOff, DateTime date)
{
if (string.IsNullOrEmpty(eventName))
{
throw new ArgumentNullException(nameof(eventName), ErrorMessageCannotBeNullOrEmpty(nameof(eventName)));
}
if (ContainsEventKey(eventName))
{
throw new ArgumentException(ErrorMessageKeyAlreadyAdded(nameof(eventName), eventName), nameof(eventName));
}
DateEventsDictionary.Add(eventName, new DateEvent(date, dayOff));
}
