feat(journal task): add crud operations for task answers

重构了任务答案的处理逻辑，将原有的先删后插从任务更新中拆分出来，新增独立的答案增删改查接口：
1. 移除了JournalPageTaskUpdateInput中的TaskAnswer属性
2. 新增JournalTaskAnswerAddInput/UpdateInput DTO
3. 在服务层实现答案的增删改业务逻辑，包含OSS文件处理
4. 在控制器中添加对应的API接口

QYZH.InteractiveMagazine.IService/IJournalPageTaskService.cs

@@ -13,4 +13,8 @@ public interface IJournalPageTaskService : IBaseService<JournalPageTask>
 
     Task<bool> DeleteAsync(long id);
     Task<bool> ComplementAsync(JournalPageTaskComplementInput input);
+
+    Task<long> AddAnswerAsync(JournalTaskAnswerAddInput input);
+    Task<bool> UpdateAnswerAsync(JournalTaskAnswerUpdateInput input);
+    Task<bool> DeleteAnswerAsync(long id);
 }

QYZH.InteractiveMagazine.Models/Dto/Journal/JournalPageTaskUpdateInput.cs

@@ -37,11 +37,6 @@ namespace QYZH.InteractiveMagazine.Models.Dto.Journal
         /// </summary>
         public string Task { get; set; }
 
-        /// <summary>
-        /// 答案
-        /// </summary>
-        public List<JournalTaskAnswerInput> TaskAnswer { get; set; }
-
         /// <summary>
         /// 积分
         /// </summary>

QYZH.InteractiveMagazine.Models/Dto/Journal/JournalTaskAnswerAddInput.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace QYZH.InteractiveMagazine.Models.Dto.Journal
+{
+    public class JournalTaskAnswerAddInput
+    {
+        /// <summary>
+        /// 题目Id
+        /// </summary>
+        public long JournalPageTaskId { get; set; }
+
+        /// <summary>
+        /// 参考答案
+        /// </summary>
+        public string Answer { get; set; }
+
+        /// <summary>
+        /// 参考答案图片
+        /// </summary>
+        public string AnswerUrl { get; set; }
+    }
+}

QYZH.InteractiveMagazine.Models/Dto/Journal/JournalTaskAnswerUpdateInput.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace QYZH.InteractiveMagazine.Models.Dto.Journal
+{
+    public class JournalTaskAnswerUpdateInput
+    {
+        /// <summary>
+        /// 答案Id
+        /// </summary>
+        public long Id { get; set; }
+
+        /// <summary>
+        /// 参考答案
+        /// </summary>
+        public string Answer { get; set; }
+
+        /// <summary>
+        /// 参考答案图片
+        /// </summary>
+        public string AnswerUrl { get; set; }
+    }
+}

QYZH.InteractiveMagazine.Service/JournalPageTaskService.cs

@@ -80,30 +80,6 @@ public class JournalPageTaskService(BaseRepository<Journal> journalRepository, O
 
         var taskResult = await base.Updateable(task).ExecuteCommandAsync() > 0;
 
-        // 答案处理：先删后插
-        await answerRepository.DeleteAsync(a => a.JournalPageTaskId == task.Id);
-
-        if (input.TaskAnswer != null && input.TaskAnswer.Count > 0)
-        {
-            foreach (var ansInput in input.TaskAnswer)
-            {
-                // 处理答案中的文件OSS拷贝
-                ansInput.Answer = Deal(null, ansInput.Answer, key, "answer");
-                ansInput.AnswerUrl = Deal(null, ansInput.AnswerUrl, key, "answerUrl");
-
-                var answerEntity = new JournalPageTaskAnswer
-                {
-                    JournalPageTaskId = task.Id,
-                    Answer = ansInput.Answer,
-                    AnswerUrL = ansInput.AnswerUrl,
-                    CreatedBy = "System",
-                    CreatedAt = DateTime.Now,
-                    IsDeleted = false
-                };
-                await answerRepository.InsertAsync(answerEntity);
-            }
-        }
-
         return taskResult;
     }
 
@@ -179,6 +155,61 @@ public class JournalPageTaskService(BaseRepository<Journal> journalRepository, O
         return await Updateable(input.Adapt<JournalPageTask>()).Where(w => w.Id == input.Id).ExecuteCommandAsync() > 0;
     }
 
+    public async Task<long> AddAnswerAsync(JournalTaskAnswerAddInput input)
+    {
+        var task = await base.Queryable().Where(w => w.Id == input.JournalPageTaskId).FirstAsync();
+        BusinessException.ThrowIf(task.IsNull(), "问题不存在");
+
+        var key = $"journal/{task.JournalId}/{task.JournalPageId}/{task.GroupId}";
+        input.Answer = Deal(null, input.Answer, key, "answer");
+        input.AnswerUrl = Deal(null, input.AnswerUrl, key, "answerUrl");
+
+        var entity = new JournalPageTaskAnswer
+        {
+            JournalPageTaskId = input.JournalPageTaskId,
+            Answer = input.Answer,
+            AnswerUrL = input.AnswerUrl,
+            CreatedBy = "System",
+            CreatedAt = DateTime.Now,
+            IsDeleted = false
+        };
+        await answerRepository.InsertAsync(entity);
+        return entity.Id;
+    }
+
+    public async Task<bool> UpdateAnswerAsync(JournalTaskAnswerUpdateInput input)
+    {
+        var answer = await answerRepository.Queryable().Where(a => a.Id == input.Id).FirstAsync();
+        BusinessException.ThrowIf(answer.IsNull(), "答案不存在");
+
+        var task = await base.Queryable().Where(w => w.Id == answer.JournalPageTaskId).FirstAsync();
+        var key = $"journal/{task.JournalId}/{task.JournalPageId}/{task.GroupId}";
+
+        input.Answer = Deal(answer.Answer, input.Answer, key, "answer");
+        input.AnswerUrl = Deal(answer.AnswerUrL, input.AnswerUrl, key, "answerUrl");
+
+        return await answerRepository.Updateable()
+            .SetColumns(a => a.Answer == input.Answer)
+            .SetColumns(a => a.AnswerUrL == input.AnswerUrl)
+            .Where(a => a.Id == input.Id)
+            .ExecuteCommandAsync() > 0;
+    }
+
+    public async Task<bool> DeleteAnswerAsync(long id)
+    {
+        var answer = await answerRepository.Queryable().Where(a => a.Id == id).FirstAsync();
+        BusinessException.ThrowIf(answer.IsNull(), "答案不存在");
+
+        var task = await base.Queryable().Where(w => w.Id == answer.JournalPageTaskId).FirstAsync();
+        var key = $"journal/{task.JournalId}/{task.JournalPageId}/{task.GroupId}";
+
+        // 清理OSS文件
+        Deal(answer.Answer, "", key, "answer");
+        Deal(answer.AnswerUrL, "", key, "answerUrl");
+
+        return await answerRepository.DeleteAsync(a => a.Id == id);
+    }
+
     private string Deal(string oldUrls, string newUrls, string key, string type)
     {
         // 如果 newUrls 为空，则直接返回

QYZH.InteractiveMagazine.WebApi/Controllers/JournalController.cs

@@ -506,6 +506,39 @@ namespace QYZH.InteractiveMagazine.WebApi.Controllers
             var data = await JournalPageTaskService.ComplementAsync(input);
             return BaseResponse<bool>.Success(data);
         }
+
+        /// <summary>
+        /// 答案新增
+        /// </summary>
+        /// <returns></returns>
+        [HttpPost, Route("page/task/answer/add")]
+        public async Task<BaseResponse<long>> AnswerAdd(JournalTaskAnswerAddInput input)
+        {
+            var data = await JournalPageTaskService.AddAnswerAsync(input);
+            return BaseResponse<long>.Success(data);
+        }
+
+        /// <summary>
+        /// 答案更新
+        /// </summary>
+        /// <returns></returns>
+        [HttpPost, Route("page/task/answer/update")]
+        public async Task<BaseResponse<bool>> AnswerUpdate(JournalTaskAnswerUpdateInput input)
+        {
+            var data = await JournalPageTaskService.UpdateAnswerAsync(input);
+            return BaseResponse<bool>.Success(data);
+        }
+
+        /// <summary>
+        /// 答案删除
+        /// </summary>
+        /// <returns></returns>
+        [HttpPost, Route("page/task/answer/delete/{id:long}")]
+        public async Task<BaseResponse<bool>> AnswerDelete(long id)
+        {
+            var data = await JournalPageTaskService.DeleteAnswerAsync(id);
+            return BaseResponse<bool>.Success(data);
+        }
         #endregion        
     }
 }