Add events before and after handling bulk imports

src/OrchardCore/OrchardCore.ContentManagement.Abstractions/Handlers/ContentHandlerBase.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace OrchardCore.ContentManagement.Handlers
@@ -146,5 +147,15 @@ public virtual Task GetContentItemAspectAsync(ContentItemAspectContext context)
         {
             return Task.CompletedTask;
         }
+
+        public Task BeforeImportAsync(IEnumerable<ImportContentContext> contentItems)
+        {
+            return Task.CompletedTask;
+        }
+
+        public Task AfterImportAsync(IEnumerable<ImportContentContext> contentItems)
+        {
+            return Task.CompletedTask;
+        }
     }
 }

src/OrchardCore/OrchardCore.ContentManagement.Abstractions/Handlers/IContentHandler.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace OrchardCore.ContentManagement.Handlers
@@ -13,7 +14,9 @@ public interface IContentHandler
         Task LoadingAsync(LoadContentContext context);
         Task LoadedAsync(LoadContentContext context);
         Task ImportingAsync(ImportContentContext context);
+        Task BeforeImportAsync(IEnumerable<ImportContentContext> contentItems);
         Task ImportedAsync(ImportContentContext context);
+        Task AfterImportAsync(IEnumerable<ImportContentContext> contentItems);
         Task UpdatingAsync(UpdateContentContext context);
         Task UpdatedAsync(UpdateContentContext context);
         Task ValidatingAsync(ValidateContentContext context);

src/OrchardCore/OrchardCore.ContentManagement/DefaultContentManager.cs

@@ -473,6 +473,9 @@ public Task<ContentValidateResult> UpdateContentItemVersionAsync(ContentItem upd
 
         public async Task ImportAsync(IEnumerable<ContentItem> contentItems)
         {
+            var contentList = contentItems.Select(x => new ImportContentContext(x)).ToList();
+            await ReversedHandlers.InvokeAsync((handler, list) => handler.BeforeImportAsync(list), contentList, _logger);
+
             var skip = 0;
 
             var importedVersionIds = new HashSet<string>();
@@ -599,6 +602,10 @@ public async Task ImportAsync(IEnumerable<ContentItem> contentItems)
                 skip += ImportBatchSize;
                 batchedContentItems = contentItems.Skip(skip).Take(ImportBatchSize);
             }
+
+            await ReversedHandlers.InvokeAsync((handler, list) => handler.AfterImportAsync(list), contentList, _logger);
+
+
         }
 
         public async Task UpdateAsync(ContentItem contentItem)