Allow to validate in scripts.

backend/src/Squidex.Domain.Apps.Core.Model/FieldDescriptions.Designer.cs

@@ -600,6 +600,15 @@ namespace Squidex.Domain.Apps.Core {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Validates the content item..
+        /// </summary>
+        public static string ContentValidate {
+            get {
+                return ResourceManager.GetString("ContentValidate", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to The context object holding all values..
         /// </summary>

backend/src/Squidex.Domain.Apps.Core.Model/FieldDescriptions.resx

@@ -297,6 +297,9 @@
   <data name="ContentUrl" xml:space="preserve">
     <value>The URL to the content.</value>
   </data>
+  <data name="ContentValidate" xml:space="preserve">
+    <value>Validates the content item.</value>
+  </data>
   <data name="Context" xml:space="preserve">
     <value>The context object holding all values.</value>
   </data>

backend/src/Squidex.Domain.Apps.Core.Operations/Scripting/ContentScriptVars.cs

@@ -13,6 +13,12 @@ namespace Squidex.Domain.Apps.Core.Scripting
 {
     public sealed class ContentScriptVars : DataScriptVars
     {
+        [FieldDescription(nameof(FieldDescriptions.ContentValidate))]
+        public Action Validate
+        {
+            set => SetValue(value);
+        }
+
         [FieldDescription(nameof(FieldDescriptions.AppId))]
         public DomainId AppId
         {

backend/src/Squidex.Domain.Apps.Core.Operations/Scripting/ScriptingCompleter.cs

@@ -235,6 +235,10 @@ namespace Squidex.Domain.Apps.Core.Scripting
                     {
                         AddBoolean(name, description);
                     }
+                    else if (typeof(MulticastDelegate).IsAssignableFrom(propertyType.BaseType))
+                    {
+                        AddFunction(name, description);
+                    }
                     else if (propertyType == typeof(AssetMetadata))
                     {
                         AddObject(name, description, () =>
@@ -386,14 +390,19 @@ namespace Squidex.Domain.Apps.Core.Scripting
                 Add(JsonType.Boolean, name, description);
             }
 
-            private void AddObject(string? name, string? description)
+            private void AddNumber(string? name, string? description)
             {
-                Add(JsonType.Object, name, description);
+                Add(JsonType.Number, name, description);
             }
 
-            private void AddNumber(string? name, string? description)
+            private void AddFunction(string? name, string? description)
             {
-                Add(JsonType.Number, name, description);
+                Add(JsonType.Function, name, description);
+            }
+
+            private void AddObject(string? name, string? description)
+            {
+                Add(JsonType.Object, name, description);
             }
 
             private void AddString(string? name, string? description)

backend/src/Squidex.Domain.Apps.Entities/Contents/DomainObject/Guards/ScriptingExtensions.cs

@@ -61,7 +61,7 @@ namespace Squidex.Domain.Apps.Entities.Contents.DomainObject.Guards
                 OldStatus = operation.Snapshot.Status,
                 Operation = "Update",
                 Status = operation.Snapshot.EditingStatus(),
-                StatusOld = default
+                StatusOld = default,
             });
 
             return TransformAsync(operation, script, vars);
@@ -85,7 +85,8 @@ namespace Squidex.Domain.Apps.Entities.Contents.DomainObject.Guards
                 OldStatus = operation.Snapshot.EditingStatus(),
                 Operation = change.ToString(),
                 Status = status,
-                StatusOld = operation.Snapshot.EditingStatus()
+                StatusOld = operation.Snapshot.EditingStatus(),
+                Validate = Validate(operation, status)
             });
 
             return TransformAsync(operation, script, vars);
@@ -126,6 +127,23 @@ namespace Squidex.Domain.Apps.Entities.Contents.DomainObject.Guards
             await operation.Resolve<IScriptEngine>().ExecuteAsync(vars, script, Options);
         }
 
+        private static Action Validate(ContentOperation operation, Status status)
+        {
+            return () =>
+            {
+                try
+                {
+                    var snapshot = operation.Snapshot;
+
+                    operation.ValidateContentAndInputAsync(snapshot.Data, false, snapshot.IsPublished() || status == Status.Published).Wait();
+                }
+                catch (AggregateException ex) when (ex.InnerException != null)
+                {
+                    throw ex.Flatten().InnerException!;
+                }
+            };
+        }
+
         private static ContentScriptVars Enrich(ContentOperation operation, ContentScriptVars vars)
         {
             vars.AppId = operation.App.Id;