Ground work for Wino Calendar. (#475)

Wino Calendar abstractions.

Wino.Core/Extensions/DateTimeExtensions.cs

@@ -0,0 +1,35 @@
+using System;
+using Wino.Core.Domain.Models.Calendar;
+
+namespace Wino.Core.Extensions
+{
+    public static class DateTimeExtensions
+    {
+        /// <summary>
+        /// Returns a date range for the month of the given date.
+        /// </summary>
+        /// <param name="date">Date to get range for.</param>
+        public static DateRange GetMonthDateRangeStartingWeekday(this DateTime date, DayOfWeek WeekStartDay)
+        {
+            var firstDayOfMonth = new DateTime(date.Year, date.Month, 1);
+
+            int daysToWeekDay = (int)firstDayOfMonth.DayOfWeek - (int)WeekStartDay;
+            if (daysToWeekDay < 0) daysToWeekDay += 7;
+
+            firstDayOfMonth = firstDayOfMonth.AddDays(-daysToWeekDay);
+
+            var lastDayOfMonth = firstDayOfMonth.AddMonths(1).AddDays(-1);
+
+            return new DateRange(firstDayOfMonth, lastDayOfMonth);
+        }
+
+        public static DateTime GetWeekStartDateForDate(this DateTime date, DayOfWeek firstDayOfWeek)
+        {
+            // Detect the first day of the week that contains the selected date.
+            int diff = (7 + (date.DayOfWeek - firstDayOfWeek)) % 7;
+
+            // Start loading from this date instead of visible date.
+            return date.AddDays(-diff).Date;
+        }
+    }
+}

Wino.Core/Extensions/GoogleIntegratorExtensions.cs

@@ -4,7 +4,7 @@ using System.Linq;
 using System.Web;
 using Google.Apis.Gmail.v1.Data;
 using MimeKit;
-using Wino.Core.Domain.Entities;
+using Wino.Core.Domain.Entities.Mail;
 using Wino.Core.Domain.Enums;
 
 namespace Wino.Core.Extensions

Wino.Core/Extensions/MailkitClientExtensions.cs

@@ -3,7 +3,7 @@ using System.Linq;
 using MailKit;
 using MimeKit;
 using Wino.Core.Domain;
-using Wino.Core.Domain.Entities;
+using Wino.Core.Domain.Entities.Mail;
 using Wino.Core.Domain.Enums;
 
 namespace Wino.Core.Extensions

Wino.Core/Extensions/MailkitExtensions.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Linq;
 using MailKit;
-using Wino.Core.Domain.Entities;
+using Wino.Core.Domain.Entities.Mail;
 
 namespace Wino.Core.Extensions
 {

Wino.Core/Extensions/OutlookIntegratorExtensions.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using Microsoft.Graph.Models;
 using MimeKit;
-using Wino.Core.Domain.Entities;
+using Wino.Core.Domain.Entities.Mail;
 using Wino.Core.Domain.Enums;
 
 namespace Wino.Core.Extensions

Wino.Core/Extensions/TokenizationExtensions.cs

@@ -1,6 +1,6 @@
 using System;
 using Microsoft.Identity.Client;
-using Wino.Core.Domain.Entities;
+using Wino.Core.Domain.Entities.Shared;
 
 namespace Wino.Core.Extensions
 {