Add publish date on overview page

src/Application/Channels/Commands/CreateChannelCommand.cs

@@ -82,6 +82,10 @@ public async Task<Guid> Handle(CreateChannelCommand request, CancellationToken c
         }
 
         entity.ActiveRevision = await GetActiveRevision(request, entity, cancellationToken);
+        if (entity.ActiveRevision is not null)
+        {
+            entity.LastPublishAt = DateTime.Now;
+        }
 
         entity.AddDomainEvent(new CreatedEvent<Channel>(entity));
 

src/Application/Channels/Commands/UpdateChannelCommand.cs

@@ -18,7 +18,7 @@ public class UpdateChannelCommand : IRequest
     public string Name { get; set; } = "";
 
     [Required]
-    public string Domain { get; set; } = "";
+    public string? Domain { get; set; }
 
     [Required]
     public ChannelRevisionSelectionStrategy RevisionSelectionStrategy { get; set; }
@@ -27,6 +27,8 @@ public class UpdateChannelCommand : IRequest
 
     public Guid? ActiveRevisionId { get; set; }
 
+    public DateTime LastPublishDate { get; set; }
+
     public Guid? CertificateId { get; set; }
 }
 

src/Application/Channels/Queries/ChannelItem.cs

@@ -34,6 +34,8 @@ public ChannelItem()
 
     public RevisionItem? ActiveRevision { get; set; }
 
+    public DateTime? LastPublishAt { get; set; }
+
     public string? RangeRule { get; set; }
 
     public CertificateItem? Certificate { get; set; }

src/Application/Revisions/EventHandlers/RevisionCreatedEventHandler.cs

@@ -1,3 +1,4 @@
+using Hippo.Application.Channels.Commands;
 using Hippo.Application.Common.Interfaces;
 using Hippo.Application.Rules;
 using Hippo.Core.Entities;
@@ -15,10 +16,15 @@ public class RevisionCreatedEventHandler : INotificationHandler<CreatedEvent<Rev
 
     private readonly IApplicationDbContext _context;
 
-    public RevisionCreatedEventHandler(ILogger<RevisionCreatedEventHandler> logger, IApplicationDbContext context)
+    private readonly IMediator _mediator;
+
+    public RevisionCreatedEventHandler(ILogger<RevisionCreatedEventHandler> logger,
+        IApplicationDbContext context,
+        IMediator mediator)
     {
         _logger = logger;
         _context = context;
+        _mediator = mediator;
     }
 
     public async Task Handle(CreatedEvent<Revision> notification, CancellationToken cancellationToken)
@@ -39,13 +45,20 @@ public async Task Handle(CreatedEvent<Revision> notification, CancellationToken
                 if (activeRevision is not null && activeRevision != channel.ActiveRevision && activeRevision.RevisionNumber == notification.Entity.RevisionNumber)
                 {
                     _logger.LogInformation($"Channel {channel.Id} changed its active revision to {activeRevision.Id}");
-                    channel.ActiveRevision = activeRevision;
-                    channel.AddDomainEvent(new ModifiedEvent<Channel>(channel));
-                    // TODO Call a command instead of updating the database in the EventHandler
+
+                    await _mediator.Send(new UpdateChannelCommand
+                    {
+                        Id = channel.Id,
+                        ActiveRevisionId = activeRevision.Id,
+                        LastPublishDate = DateTime.Now,
+                        CertificateId = channel.CertificateId,
+                        Domain = channel.Domain,
+                        Name = channel.Name,
+                        RangeRule = channel.RangeRule,
+                        RevisionSelectionStrategy = channel.RevisionSelectionStrategy,
+                    }, cancellationToken);
                 }
             }
         }
-
-        await _context.SaveChangesAsync(cancellationToken);
     }
 }

src/Core/Entities/Channel.cs

@@ -14,6 +14,8 @@ public class Channel : AuditableEntity
 
     public Revision? ActiveRevision { get; set; }
 
+    public DateTime? LastPublishAt { get; set; }
+
     public Guid? CertificateId { get; set; }
 
     public Certificate? Certificate { get; set; }

src/Infrastructure/Data/ApplicationDbContext.cs

@@ -57,8 +57,10 @@ protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
 
     public override async Task<int> SaveChangesAsync(CancellationToken cancellationToken = new CancellationToken())
     {
+        var result = await base.SaveChangesAsync(cancellationToken);
+
         await _mediator.DispatchDomainEvents(this);
 
-        return await base.SaveChangesAsync(cancellationToken);
+        return result;
     }
 }