Summarize user comments for image gallery with AI

src/CmsKitDemo/CmsKitDemo.csproj

@@ -1,13 +1,15 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
+<Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
     <TargetFramework>net9.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <GenerateEmbeddedFilesManifest>true</GenerateEmbeddedFilesManifest>
+    <UserSecretsId>5aa5f469-f212-4f04-a3e5-75c7ca424d2b</UserSecretsId>
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="9.4.0-preview.1.25207.5" />
     <PackageReference Include="Serilog.AspNetCore" Version="9.0.0" />
     <PackageReference Include="Serilog.Sinks.Async" Version="2.1.0" />
     <PackageReference Include="AspNetCore.HealthChecks.UI" Version="9.0.0" />

src/CmsKitDemo/Entities/GalleryImage.cs

@@ -9,6 +9,8 @@ public class GalleryImage : CreationAuditedAggregateRoot<Guid>
         public string Description { get; set; }
 
         public Guid CoverImageMediaId { get; set; }
+
+        public string CommentsSummary { get; set; }
 
         protected GalleryImage()
         {

src/CmsKitDemo/EventHandlers/GalleryImageCommentListener.cs

@@ -0,0 +1,70 @@
+using CmsKitDemo.Entities;
+using CmsKitDemo.Utils;
+using Microsoft.EntityFrameworkCore;
+using Volo.Abp.DependencyInjection;
+using Volo.Abp.Domain.Entities.Events;
+using Volo.Abp.Domain.Repositories;
+using Volo.Abp.EventBus;
+using Volo.CmsKit.Comments;
+
+namespace CmsKitDemo.EventHandlers;
+
+public class GalleryImageCommentListener : ILocalEventHandler<EntityChangedEventData<Comment>>, ITransientDependency
+{
+    private readonly IRepository<GalleryImage, Guid> _galleryImageRepository;
+    private readonly IRepository<Comment, Guid> _commentRepository;
+    private readonly AiCommentSummarizer _aiCommentSummarizer;
+
+    public GalleryImageCommentListener(
+        IRepository<GalleryImage, Guid> galleryImageRepository,
+        IRepository<Comment, Guid> commentRepository,
+        AiCommentSummarizer aiCommentSummarizer)
+    {
+        _galleryImageRepository = galleryImageRepository;
+        _commentRepository = commentRepository;
+        _aiCommentSummarizer = aiCommentSummarizer;
+    }
+
+    public async Task HandleEventAsync(EntityChangedEventData<Comment> eventData)
+    {
+        var comment = eventData.Entity;
+
+        //Here, we only interest in comments related to image gallery items
+        if (comment.EntityType != CmsKitDemoConsts.ImageGalleryEntityType)
+        {
+            return;
+        }
+
+        if (!Guid.TryParse(comment.EntityId, out var galleryImageId))
+        {
+            return;
+        }
+
+        // Get the related image from database
+        var galleryImage = await _galleryImageRepository.FindAsync(galleryImageId);
+        if (galleryImage == null)
+        {
+            return;
+        }
+
+        // Get all the comments related to the image
+        var queryable = await _commentRepository.GetQueryableAsync();
+        var allCommentTexts = await queryable
+            .Where(c => c.EntityType == CmsKitDemoConsts.ImageGalleryEntityType && c.EntityId == comment.EntityId)
+            .Select(c => c.Text)
+            .ToArrayAsync();
+
+        // Update the summary of comments related to the image
+        if (allCommentTexts.Length <= 0)
+        {
+            galleryImage.CommentsSummary = "";
+        }
+        else
+        {
+            galleryImage.CommentsSummary = await _aiCommentSummarizer.SummarizeAsync(allCommentTexts);
+        }
+
+        // Update the image in database
+        await _galleryImageRepository.UpdateAsync(galleryImage);
+    }
+}