Monthly calendar basics.

Wino.Core.Domain/Entities/Shared/MailAccount.cs

@@ -40,6 +40,13 @@ namespace Wino.Core.Domain.Entities.Shared
         /// </summary>
         public string SynchronizationDeltaIdentifier { get; set; }
 
+        /// <summary>
+        /// For tracking calendar change delta.
+        /// Gmail: It's per-calendar, so unused.
+        /// Outlook: deltaLink
+        /// </summary>
+        public string CalendarSynchronizationDeltaIdentifier { get; set; }
+
         /// <summary>
         /// TODO: Gets or sets the custom account identifier color in hex.
         /// </summary>

Wino.Core.Domain/Enums/WinoPage.cs

@@ -13,6 +13,7 @@
         WelcomePage,
         AccountDetailsPage,
         MergedAccountDetailsPage,
+        ManageAccountsPage,
         AccountManagementPage,
         SignatureManagementPage,
         AboutPage,

Wino.Core.Domain/Extensions/DateTimeExtensions.cs

@@ -0,0 +1,33 @@
+using System;
+using Wino.Core.Domain.Models.Calendar;
+
+namespace Wino.Core.Domain.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)
+        {
+            DateTime firstDayOfMonth = new DateTime(date.Year, date.Month, 1);
+
+            int daysToSubtract = (7 + (firstDayOfMonth.DayOfWeek - WeekStartDay)) % 7;
+            DateTime rangeStart = firstDayOfMonth.AddDays(-daysToSubtract);
+
+            DateTime rangeEnd = rangeStart.AddDays(34);
+
+            return new DateRange(rangeStart, rangeEnd);
+        }
+
+        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.Domain/Interfaces/IDialogServiceBase.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
+using Wino.Core.Domain.Entities.Shared;
 using Wino.Core.Domain.Enums;
 using Wino.Core.Domain.Models.Accounts;
 using Wino.Core.Domain.Models.Common;
@@ -16,6 +17,7 @@ namespace Wino.Core.Domain.Interfaces
         void InfoBarMessage(string title, string message, InfoBarMessageType messageType);
         void InfoBarMessage(string title, string message, InfoBarMessageType messageType, string actionButtonText, Action action);
         void ShowNotSupportedMessage();
+        Task<MailAccount> ShowEditAccountDialogAsync(MailAccount account);
         Task<string> ShowTextInputDialogAsync(string currentInput, string dialogTitle, string dialogDescription, string primaryButtonText);
         Task<bool> ShowWinoCustomMessageDialogAsync(string title,
                                             string description,

Wino.Core.Domain/Interfaces/IMailDialogService.cs

@@ -16,7 +16,6 @@ namespace Wino.Core.Domain.Interfaces
 
         // Custom dialogs
         Task<IMailItemFolder> ShowMoveMailFolderDialogAsync(List<IMailItemFolder> availableFolders);
-        Task<MailAccount> ShowEditAccountDialogAsync(MailAccount account);
         Task<MailAccount> ShowAccountPickerDialogAsync(List<MailAccount> availableAccounts);
 
         /// <summary>

Wino.Core.Domain/Models/Calendar/CalendarTypeStrategies/MonthCalendarDrawingStrategy.cs

@@ -0,0 +1,36 @@
+using System;
+using Wino.Core.Domain.Enums;
+using Wino.Core.Domain.Extensions;
+
+namespace Wino.Core.Domain.Models.Calendar.CalendarTypeStrategies
+{
+    public class MonthCalendarDrawingStrategy : BaseCalendarTypeDrawingStrategy
+    {
+        public MonthCalendarDrawingStrategy(CalendarSettings settings)
+            : base(settings, CalendarDisplayType.Month)
+        {
+        }
+
+        public override DateRange GetNextDateRange(DateRange CurrentDateRange, int DayDisplayCount)
+        {
+            return DateTimeExtensions.GetMonthDateRangeStartingWeekday(CurrentDateRange.EndDate, Settings.FirstDayOfWeek);
+        }
+
+        public override DateRange GetPreviousDateRange(DateRange CurrentDateRange, int DayDisplayCount)
+        {
+            return DateTimeExtensions.GetMonthDateRangeStartingWeekday(CurrentDateRange.StartDate, Settings.FirstDayOfWeek);
+        }
+
+        public override DateRange GetRenderDateRange(DateTime DisplayDate, int DayDisplayCount)
+        {
+            // Load 2 months at first.
+            var initialRange = DateTimeExtensions.GetMonthDateRangeStartingWeekday(DisplayDate.Date, Settings.FirstDayOfWeek);
+
+            var nextRange = GetNextDateRange(initialRange, DayDisplayCount);
+
+            return new DateRange(initialRange.StartDate, nextRange.EndDate);
+        }
+
+        public override int GetRenderDayCount(DateTime DisplayDate, int DayDisplayCount) => 35;
+    }
+}

Wino.Core.Domain/Translations/en_US/resources.json

@@ -135,6 +135,8 @@
     "CalendarItem_DetailsPopup_JoinOnline": "Join online",
     "CalendarItem_DetailsPopup_ViewEventButton": "View event",
     "CalendarItem_DetailsPopup_ViewSeriesButton": "View series",
+    "CalendarDisplayOptions_Expand": "Expand",
+    "CalendarDisplayOptions_Color": "Color",
     "CreateAccountAliasDialog_Title": "Create Account Alias",
     "CreateAccountAliasDialog_Description": "Make sure your outgoing server allows sending mails from this alias.",
     "CreateAccountAliasDialog_AliasAddress": "Address",