From edfc9aa1399c1855a5728d2c2566513e0cdde120 Mon Sep 17 00:00:00 2001
From: Mikhail Shabanov <dr.mboga@yahoo.com>
Date: Tue, 18 May 2021 17:41:36 +0200
Subject: [PATCH] feat: time interval extension method (aka pipe)

---
 .../Helpers/DatesHelperTests.cs               | 32 +++++++++++++
 .../Helpers/DateDifferenceHelper.cs           | 48 +++++++++++++++++++
 .../Model/TimeInterval.cs                     | 11 +++++
 .../Pages/FindClanListItem.razor              |  5 +-
 .../Resources/App.de.resx                     |  9 ++++
 .../Resources/App.ru.resx                     |  9 ++++
 6 files changed, 112 insertions(+), 2 deletions(-)
 create mode 100644 WotBlitzStatisticsPro.Blazor.Tests/Helpers/DatesHelperTests.cs
 create mode 100644 WotBlitzStatisticsPro.Blazor/Helpers/DateDifferenceHelper.cs
 create mode 100644 WotBlitzStatisticsPro.Blazor/Model/TimeInterval.cs

diff --git a/WotBlitzStatisticsPro.Blazor.Tests/Helpers/DatesHelperTests.cs b/WotBlitzStatisticsPro.Blazor.Tests/Helpers/DatesHelperTests.cs
new file mode 100644
index 0000000..0e9d67f
--- /dev/null
+++ b/WotBlitzStatisticsPro.Blazor.Tests/Helpers/DatesHelperTests.cs
@@ -0,0 +1,32 @@
+using System;
+using FluentAssertions;
+using NUnit.Framework;
+using WotBlitzStatisticsPro.Blazor.Helpers;
+using WotBlitzStatisticsPro.Blazor.Model;
+
+namespace WotBlitzStatisticsPro.Blazor.Tests.Helpers
+{
+    public class DatesHelperTests
+    {
+        [SetUp]
+        public void Init()
+        {
+        }
+
+        [Test]
+        public void ShouldCalculateYears()
+        {
+            var currentDate = new DateTime(2021, 5, 18);
+
+            for (int i = 0; i < 10; i++)
+            {
+                var initialTime = currentDate.AddYears(-(1 + i * 3)).AddMonths(-i).AddDays(-i);
+                var result = DateDifferenceHelper.ParseTheDifference(currentDate - initialTime);
+                result.interval.Should().Be(TimeInterval.Year);
+                result.value.Should().Be(1 + i * 3);
+            }
+        }
+
+        // ToDo: Write months, days, hours and minutes scenarios
+    }
+}
\ No newline at end of file
diff --git a/WotBlitzStatisticsPro.Blazor/Helpers/DateDifferenceHelper.cs b/WotBlitzStatisticsPro.Blazor/Helpers/DateDifferenceHelper.cs
new file mode 100644
index 0000000..3396792
--- /dev/null
+++ b/WotBlitzStatisticsPro.Blazor/Helpers/DateDifferenceHelper.cs
@@ -0,0 +1,48 @@
+using System;
+using Microsoft.Extensions.Localization;
+using WotBlitzStatisticsPro.Blazor.Model;
+
+namespace WotBlitzStatisticsPro.Blazor.Helpers
+{
+    public static class DateDifferenceHelper
+    {
+        public static string SinceTime(this int timeInLinuxTimeStamp, IStringLocalizer<App> localizer)
+        {
+            var currentDate = DateTime.Now;
+            var timeToCalculate = new DateTime(1970, 1, 1) + TimeSpan.FromSeconds(timeInLinuxTimeStamp);
+
+            var difference = ParseTheDifference(currentDate - timeToCalculate);
+            string ago = difference.interval switch
+            {
+                TimeInterval.Year => localizer.GetString("years ago"),
+                TimeInterval.Month => localizer.GetString("months ago"),
+                TimeInterval.Day => localizer.GetString("days ago"),
+                TimeInterval.Hour => localizer.GetString("hours ago"),
+                TimeInterval.Minute => localizer.GetString("minutes ago")
+            };
+
+            return $"{difference.value} {ago}";
+        }
+
+        public static (int value, TimeInterval interval) ParseTheDifference(TimeSpan difference)
+        {
+            // ToDo: Check hours and mins if Days is 0
+            return difference.TotalDays switch
+            {
+                >= 365 => (CalculateYears(difference.TotalDays), TimeInterval.Year),
+                (> 30) and (< 365) => (CalculateMonths(difference.TotalDays), TimeInterval.Month),
+                _ => (Convert.ToInt32(difference.TotalDays), TimeInterval.Day)
+            };
+        }
+
+        private static int CalculateYears(double days)
+        {
+            return Convert.ToInt32(days) / 365;
+        }
+
+        private static int CalculateMonths(double days)
+        {
+            return Convert.ToInt32(days) / 30;
+        }
+    }
+}
\ No newline at end of file
diff --git a/WotBlitzStatisticsPro.Blazor/Model/TimeInterval.cs b/WotBlitzStatisticsPro.Blazor/Model/TimeInterval.cs
new file mode 100644
index 0000000..e72f553
--- /dev/null
+++ b/WotBlitzStatisticsPro.Blazor/Model/TimeInterval.cs
@@ -0,0 +1,11 @@
+namespace WotBlitzStatisticsPro.Blazor.Model
+{
+    public enum TimeInterval
+    {
+        Minute,
+        Hour,
+        Day,
+        Month,
+        Year
+    }
+}
\ No newline at end of file
diff --git a/WotBlitzStatisticsPro.Blazor/Pages/FindClanListItem.razor b/WotBlitzStatisticsPro.Blazor/Pages/FindClanListItem.razor
index 6118be0..394b750 100644
--- a/WotBlitzStatisticsPro.Blazor/Pages/FindClanListItem.razor
+++ b/WotBlitzStatisticsPro.Blazor/Pages/FindClanListItem.razor
@@ -1,4 +1,5 @@
-@inject IStringLocalizer<App> Localize
+@using WotBlitzStatisticsPro.Blazor.Helpers
+@inject IStringLocalizer<App> Localize
 <div class="container">
     <div class="row">
         <div class="col-sm-4 col-4">
@@ -13,7 +14,7 @@
             <span style="font-size: 11px"><img src="/clan/clan.sortby.role.scale-200.png" style="height: 20px" /> @Clan.MembersCount</span>
         </div>
         <div class="col-sm-9 col-9" title="@Localize["Created"]">
-            <span style="font-size: 11px"><img src="/icons/calendar.scale-200.png" style="height: 20px" /> @Clan.CreatedAt</span>
+            <span style="font-size: 11px"><img src="/icons/calendar.scale-200.png" style="height: 20px" /> @Clan.CreatedAt.SinceTime(Localize)</span>
         </div>
     </div>
 </div>
diff --git a/WotBlitzStatisticsPro.Blazor/Resources/App.de.resx b/WotBlitzStatisticsPro.Blazor/Resources/App.de.resx
index e614664..d986568 100644
--- a/WotBlitzStatisticsPro.Blazor/Resources/App.de.resx
+++ b/WotBlitzStatisticsPro.Blazor/Resources/App.de.resx
@@ -120,6 +120,9 @@
   <data name="Created" xml:space="preserve">
     <value>Erstellt</value>
   </data>
+  <data name="days ago" xml:space="preserve">
+    <value>vor Tagen</value>
+  </data>
   <data name="Home" xml:space="preserve">
     <value>Startseite</value>
   </data>
@@ -129,6 +132,9 @@
   <data name="Members" xml:space="preserve">
     <value>Mitglieder</value>
   </data>
+  <data name="months ago" xml:space="preserve">
+    <value>vor Monaten</value>
+  </data>
   <data name="Search" xml:space="preserve">
     <value>Suchen</value>
   </data>
@@ -141,4 +147,7 @@
   <data name="Welcome to WOT Blitz statistics application!" xml:space="preserve">
     <value>Willkommen bei der WOT Blitz statistics!</value>
   </data>
+  <data name="years ago" xml:space="preserve">
+    <value>vor Jahren</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/WotBlitzStatisticsPro.Blazor/Resources/App.ru.resx b/WotBlitzStatisticsPro.Blazor/Resources/App.ru.resx
index 784eb17..82b6bcb 100644
--- a/WotBlitzStatisticsPro.Blazor/Resources/App.ru.resx
+++ b/WotBlitzStatisticsPro.Blazor/Resources/App.ru.resx
@@ -120,6 +120,9 @@
   <data name="Created" xml:space="preserve">
     <value>Создан</value>
   </data>
+  <data name="days ago" xml:space="preserve">
+    <value>дней назад</value>
+  </data>
   <data name="Home" xml:space="preserve">
     <value>На главную</value>
   </data>
@@ -129,6 +132,9 @@
   <data name="Members" xml:space="preserve">
     <value>Участников</value>
   </data>
+  <data name="months ago" xml:space="preserve">
+    <value>месяцев назад</value>
+  </data>
   <data name="Search" xml:space="preserve">
     <value>Поиск</value>
   </data>
@@ -141,4 +147,7 @@
   <data name="Welcome to WOT Blitz statistics application!" xml:space="preserve">
     <value>Добро пожаловать в WOT Blitz statistics!</value>
   </data>
+  <data name="years ago" xml:space="preserve">
+    <value>лет назад</value>
+  </data>
 </root>
\ No newline at end of file