Updated the backend side

modules/cms-kit/src/Volo.CmsKit.Public.Application.Contracts/Volo/CmsKit/Public/Comments/CreateCommentInput.cs

@@ -13,4 +13,8 @@ public class CreateCommentInput
     public string Text { get; set; }
 
     public Guid? RepliedCommentId { get; set; }
+    
+    public Guid? CaptchaToken { get; set; }
+    
+    public int CaptchaAnswer { get; set; }
 }

modules/cms-kit/src/Volo.CmsKit.Public.Application/Volo.CmsKit.Public.Application.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <Import Project="..\..\..\..\common.props" />
   <Import Project="..\..\..\..\configureawait.props" />
@@ -9,6 +9,8 @@
   </PropertyGroup>
 
   <ItemGroup>
+	<PackageReference Include="SixLabors.ImageSharp" Version="1.0.4" />
+	<PackageReference Include="SixLabors.ImageSharp.Drawing" Version="1.0.0-beta13" />
     <ProjectReference Include="..\Volo.CmsKit.Common.Application\Volo.CmsKit.Common.Application.csproj" />
     <ProjectReference Include="..\Volo.CmsKit.Public.Application.Contracts\Volo.CmsKit.Public.Application.Contracts.csproj" />
   </ItemGroup>

modules/cms-kit/src/Volo.CmsKit.Public.Application/Volo/CmsKit/Public/Comments/CommentPublicAppService.cs

@@ -3,6 +3,8 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Authorization;
+using SixLabors.ImageSharp.Formats.Gif;
+using Volo.Abp;
 using Volo.Abp.Application.Dtos;
 using Volo.Abp.Authorization;
 using Volo.Abp.Data;
@@ -13,6 +15,7 @@ using Volo.Abp.Users;
 using Volo.CmsKit.Comments;
 using Volo.CmsKit.Features;
 using Volo.CmsKit.GlobalFeatures;
+using Volo.CmsKit.Public.Application.Security.VoloCaptcha;
 using Volo.CmsKit.Users;
 
 namespace Volo.CmsKit.Public.Comments;
@@ -26,16 +29,20 @@ public class CommentPublicAppService : CmsKitPublicAppServiceBase, ICommentPubli
     public IDistributedEventBus DistributedEventBus { get; }
     protected CommentManager CommentManager { get; }
 
+    public SimpleMathsCaptchaGenerator SimpleMathsCaptchaGenerator { get; }
+
     public CommentPublicAppService(
         ICommentRepository commentRepository,
         ICmsUserLookupService cmsUserLookupService,
         IDistributedEventBus distributedEventBus,
-        CommentManager commentManager)
+        CommentManager commentManager,
+        SimpleMathsCaptchaGenerator simpleMathsCaptchaGenerator)
     {
         CommentRepository = commentRepository;
         CmsUserLookupService = cmsUserLookupService;
         DistributedEventBus = distributedEventBus;
         CommentManager = commentManager;
+        SimpleMathsCaptchaGenerator = simpleMathsCaptchaGenerator;
     }
 
     public virtual async Task<ListResultDto<CommentWithDetailsDto>> GetListAsync(string entityType, string entityId)
@@ -51,6 +58,11 @@ public class CommentPublicAppService : CmsKitPublicAppServiceBase, ICommentPubli
     [Authorize]
     public virtual async Task<CommentDto> CreateAsync(string entityType, string entityId, CreateCommentInput input)
     {
+        if (input.RepliedCommentId.HasValue)
+        { 
+            SimpleMathsCaptchaGenerator.Validate(input.CaptchaToken.Value, input.CaptchaAnswer);
+        }
+        
         var user = await CmsUserLookupService.GetByIdAsync(CurrentUser.GetId());
 
         if (input.RepliedCommentId.HasValue)