Create OrganizationMembershipChangedEventHandler

src/EventHub.Domain/Organizations/Memberships/OrganizationMembershipChangedEventHandler.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Threading.Tasks;
+using EventHub.Organizations;
+using EventHub.Organizations.Memberships;
+using Volo.Abp.DependencyInjection;
+using Volo.Abp.Domain.Entities.Events;
+using Volo.Abp.Domain.Repositories;
+using Volo.Abp.EventBus;
+
+namespace EventHub.Domain.Organizations.Memberships
+{
+	public class OrganizationMembershipChangedEventHandler : ILocalEventHandler<EntityCreatedEventData<OrganizationMembership>>,
+		 ILocalEventHandler<EntityDeletedEventData<OrganizationMembership>>, ITransientDependency
+	{
+		private readonly IRepository<Organization, Guid> _organizationRepository;
+
+		public OrganizationMembershipChangedEventHandler(IRepository<Organization, Guid> organizationRepository)
+		{
+			_organizationRepository = organizationRepository;
+		}
+
+		public async Task HandleEventAsync(EntityCreatedEventData<OrganizationMembership> eventData)
+		{
+			var organization = await _organizationRepository.GetAsync(eventData.Entity.OrganizationId);
+
+			organization.MemberCount++;
+
+			await _organizationRepository.UpdateAsync(organization);
+		}
+
+		public async Task HandleEventAsync(EntityDeletedEventData<OrganizationMembership> eventData)
+		{
+			var organization = await _organizationRepository.GetAsync(eventData.Entity.OrganizationId);
+
+			organization.MemberCount--;
+
+			await _organizationRepository.UpdateAsync(organization);
+		}
+	}
+}