refactoring and integration tests

PracticeCalendar.Application/PracticeEvents/Events/AttendeeAddedEventNotification.cs

@@ -0,0 +1,24 @@
+using MediatR;
+using PracticeCalendar.Domain.Common;
+using PracticeCalendar.Domain.Events;
+using PracticeCalendar.Domain.Interfaces;
+
+namespace PracticeCalendar.Application.PracticeEvents.Events
+{
+    public class AttendeeAddedEventNotification : INotificationHandler<DomainEventNotification<AttendeeAddedEvent>>
+    {
+        private readonly IEmailSender emailSender;
+
+        public AttendeeAddedEventNotification(IEmailSender emailSender)
+        {
+            this.emailSender = emailSender;
+        }
+
+        public async Task Handle(DomainEventNotification<AttendeeAddedEvent> notification, CancellationToken cancellationToken)
+        {
+            var sendTo = notification.DomainEvent.AddedAtendee.EmailAddress;
+            await emailSender.SendEmailAsync(sendTo, "system", 
+                "You have been added to the event", "Confirmed you have been added to the event.");
+        }
+    }
+}