Asset fixes

src/Squidex.Events/Assets/AssetCreated.cs

@@ -0,0 +1,18 @@
+// ==========================================================================
+//  AssetCreated.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using Squidex.Infrastructure;
+
+namespace Squidex.Events.Assets
+{
+    [TypeName("AssetCreatedEvent")]
+    public class AssetCreated : AssetEvent
+    {
+        public string Name { get; set; }
+    }
+}

src/Squidex.Events/Assets/AssetDeleted.cs

@@ -0,0 +1,17 @@
+// ==========================================================================
+//  AssetDeleted.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using Squidex.Infrastructure;
+
+namespace Squidex.Events.Assets
+{
+    [TypeName("AssetDeletedEvent")]
+    public sealed class AssetDeleted : AssetEvent
+    {
+    }
+}

src/Squidex.Events/Assets/AssetEvent.cs

@@ -0,0 +1,18 @@
+// ==========================================================================
+//  AssertEvent.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using System;
+using Squidex.Infrastructure.CQRS.Events;
+
+namespace Squidex.Events.Assets
+{
+    public abstract class AssetEvent : IEvent
+    {
+        public Guid AssetId { get; set; }
+    }
+}

src/Squidex.Events/Assets/AssetRenamed.cs

@@ -0,0 +1,18 @@
+// ==========================================================================
+//  AssetRenamed.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using Squidex.Infrastructure;
+
+namespace Squidex.Events.Assets
+{
+    [TypeName("AssetRenamedEvent")]
+    public class AssetRenamed : AssetEvent
+    {
+        public string Name { get; set; }
+    }
+}

src/Squidex.Write/Assets/AssetDomainObject.cs

@@ -0,0 +1,118 @@
+// ==========================================================================
+//  AssetDomainObject.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using System;
+using Squidex.Events.Assets;
+using Squidex.Infrastructure;
+using Squidex.Infrastructure.CQRS;
+using Squidex.Infrastructure.CQRS.Events;
+using Squidex.Infrastructure.Dispatching;
+using Squidex.Infrastructure.Reflection;
+using Squidex.Write.Assets.Commands;
+
+namespace Squidex.Write.Assets
+{
+    public class AssetDomainObject : DomainObject
+    {
+        private bool isDeleted;
+        private string name;
+
+        public bool IsDeleted
+        {
+            get { return isDeleted; }
+        }
+
+        public string Name
+        {
+            get { return name; }
+        }
+
+        public AssetDomainObject(Guid id, int version) 
+            : base(id, version)
+        {
+        }
+
+        protected void On(AssetCreated @event)
+        {
+            name = @event.Name;
+        }
+
+        protected void On(AssetRenamed @event)
+        {
+            name = @event.Name;
+        }
+
+        protected void On(AssetDeleted @event)
+        {
+            isDeleted = true;
+        }
+
+        public AssetDomainObject Create(CreateAsset command)
+        {
+            Guard.Valid(command, nameof(command), () => "Cannot create content");
+
+            VerifyNotCreated();
+
+            RaiseEvent(SimpleMapper.Map(command, new AssetCreated()));
+
+            return this;
+        }
+
+        public AssetDomainObject Delete(DeleteAsset command)
+        {
+            Guard.NotNull(command, nameof(command));
+
+            VerifyCreatedAndNotDeleted();
+
+            RaiseEvent(SimpleMapper.Map(command, new AssetDeleted()));
+
+            return this;
+        }
+
+        public AssetDomainObject Rename(RenameAsset command)
+        {
+            Guard.NotNull(command, nameof(command));
+
+            VerifyCreatedAndNotDeleted();
+            VerifyDifferentNames(command.Name, () => "Cannot rename asset.");
+
+            RaiseEvent(SimpleMapper.Map(command, new AssetRenamed()));
+
+            return this;
+        }
+
+        private void VerifyDifferentNames(string newName, Func<string> message)
+        {
+            if (string.Equals(name, newName))
+            {
+                throw new ValidationException(message(), new ValidationError("The asset already has this name.", "Name"));
+            }
+        }
+
+        private void VerifyNotCreated()
+        {
+            if (!string.IsNullOrWhiteSpace(name))
+            {
+                throw new DomainException("Asset has already been created.");
+            }
+        }
+
+        private void VerifyCreatedAndNotDeleted()
+        {
+            if (isDeleted || !string.IsNullOrWhiteSpace(name))
+            {
+                throw new DomainException("Asset has already been deleted or not created yet.");
+            }
+        }
+
+        protected override void DispatchEvent(Envelope<IEvent> @event)
+        {
+            this.DispatchAction(@event.Payload);
+        }
+    }
+}

src/Squidex.Write/Assets/Commands/AssetAggregateCommand.cs

@@ -0,0 +1,23 @@
+// ==========================================================================
+//  AssetAggregateCommand.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using System;
+using Squidex.Infrastructure.CQRS.Commands;
+
+namespace Squidex.Write.Assets.Commands
+{
+    public abstract class AssetAggregateCommand : AppCommand, IAggregateCommand
+    {
+        public Guid AssetId { get; set; }
+
+        Guid IAggregateCommand.AggregateId
+        {
+            get { return AssetId; }
+        }
+    }
+}

src/Squidex.Write/Assets/Commands/CreateAsset.cs

@@ -0,0 +1,26 @@
+// ==========================================================================
+//  CreateAsset.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using System.Collections.Generic;
+using Squidex.Infrastructure;
+
+namespace Squidex.Write.Assets.Commands
+{
+    public sealed class CreateAsset : AssetAggregateCommand, IValidatable
+    {
+        public string Name { get; set; }
+
+        public void Validate(IList<ValidationError> errors)
+        {
+            if (!Name.IsSlug())
+            {
+                errors.Add(new ValidationError("Name must be a valid slug", nameof(Name)));
+            }
+        }
+    }
+}

src/Squidex.Write/Assets/Commands/DeleteAsset.cs

@@ -0,0 +1,14 @@
+// ==========================================================================
+//  DeleteAsset.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+namespace Squidex.Write.Assets.Commands
+{
+    public sealed class DeleteAsset : AssetAggregateCommand
+    {
+    }
+}

src/Squidex.Write/Assets/Commands/RenameAsset.cs

@@ -0,0 +1,26 @@
+// ==========================================================================
+//  RenameAsset.cs
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex Group
+//  All rights reserved.
+// ==========================================================================
+
+using System.Collections.Generic;
+using Squidex.Infrastructure;
+
+namespace Squidex.Write.Assets.Commands
+{
+    public sealed class RenameAsset : AssetAggregateCommand, IValidatable
+    {
+        public string Name { get; set; }
+
+        public void Validate(IList<ValidationError> errors)
+        {
+            if (!string.IsNullOrWhiteSpace(Name))
+            {
+                errors.Add(new ValidationError("Name must not be null or empty.", nameof(Name)));
+            }
+        }
+    }
+}