Ground work for Wino Calendar. (#475)

Wino Calendar abstractions.

Wino.Core.Domain/Models/Calendar/CalendarDayModel.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.ObjectModel;
+using Itenso.TimePeriod;
+using Wino.Core.Domain.Interfaces;
+
+namespace Wino.Core.Domain.Models.Calendar
+{
+    /// <summary>
+    /// Represents a day in the calendar.
+    /// Can hold events, appointments, wheather status etc.
+    /// </summary>
+    public class CalendarDayModel
+    {
+        public TimeRange Period { get; }
+        public ObservableCollection<ICalendarItem> Events { get; } = new ObservableCollection<ICalendarItem>();
+        public CalendarDayModel(DateTime representingDate, CalendarRenderOptions calendarRenderOptions)
+        {
+            RepresentingDate = representingDate;
+            Period = new TimeRange(representingDate, representingDate.AddDays(1));
+            CalendarRenderOptions = calendarRenderOptions;
+        }
+
+        public DateTime RepresentingDate { get; }
+        public CalendarRenderOptions CalendarRenderOptions { get; }
+    }
+}