feat: 添加测试用户到种子数据, AI改写功能优化, 前端联调修复

server/app/routers/drafts.py

@@ -32,6 +32,24 @@ class CreateDraftRequest(BaseModel):
     prompt: str
 
 
+class CreateEndingDraftRequest(BaseModel):
+    """结局改写请求"""
+    userId: int
+    storyId: int
+    endingName: str
+    endingContent: str
+    prompt: str
+
+
+class ContinueEndingDraftRequest(BaseModel):
+    """结局续写请求"""
+    userId: int
+    storyId: int
+    endingName: str
+    endingContent: str
+    prompt: str
+
+
 class DraftResponse(BaseModel):
     id: int
     storyId: int
@@ -120,6 +138,174 @@ async def process_ai_rewrite(draft_id: int):
                 pass
 
 
+async def process_ai_rewrite_ending(draft_id: int):
+    """后台异步处理AI改写结局"""
+    from app.database import async_session_factory
+    from app.services.ai import ai_service
+    import json
+    import re
+    
+    async with async_session_factory() as db:
+        try:
+            # 获取草稿
+            result = await db.execute(select(StoryDraft).where(StoryDraft.id == draft_id))
+            draft = result.scalar_one_or_none()
+            
+            if not draft:
+                return
+            
+            # 更新状态为处理中
+            draft.status = DraftStatus.processing
+            await db.commit()
+            
+            # 获取故事信息
+            story_result = await db.execute(select(Story).where(Story.id == draft.story_id))
+            story = story_result.scalar_one_or_none()
+            
+            if not story:
+                draft.status = DraftStatus.failed
+                draft.error_message = "故事不存在"
+                draft.completed_at = datetime.now()
+                await db.commit()
+                return
+            
+            # 从 path_history 获取结局信息
+            ending_info = draft.path_history or {}
+            ending_name = ending_info.get("endingName", "未知结局")
+            ending_content = ending_info.get("endingContent", "")
+            
+            # 调用AI服务改写结局
+            ai_result = await ai_service.rewrite_ending(
+                story_title=story.title,
+                story_category=story.category or "未知",
+                ending_name=ending_name,
+                ending_content=ending_content,
+                user_prompt=draft.user_prompt
+            )
+            
+            if ai_result and ai_result.get("content"):
+                content = ai_result["content"]
+                new_ending_name = f"{ending_name}（AI改写）"
+                
+                # 尝试解析 JSON 格式的返回
+                try:
+                    json_match = re.search(r'\{[^{}]*"ending_name"[^{}]*"content"[^{}]*\}', content, re.DOTALL)
+                    if json_match:
+                        parsed = json.loads(json_match.group())
+                        new_ending_name = parsed.get("ending_name", new_ending_name)
+                        content = parsed.get("content", content)
+                    else:
+                        parsed = json.loads(content)
+                        new_ending_name = parsed.get("ending_name", new_ending_name)
+                        content = parsed.get("content", content)
+                except (json.JSONDecodeError, AttributeError):
+                    pass
+                
+                # 成功 - 存储为单节点结局格式
+                draft.status = DraftStatus.completed
+                draft.ai_nodes = [{
+                    "nodeKey": "ending_rewrite",
+                    "content": content,
+                    "speaker": "旁白",
+                    "isEnding": True,
+                    "endingName": new_ending_name,
+                    "endingType": "rewrite"
+                }]
+                draft.entry_node_key = "ending_rewrite"
+                draft.tokens_used = ai_result.get("tokens_used", 0)
+                draft.title = f"{story.title}-{new_ending_name}"
+            else:
+                draft.status = DraftStatus.failed
+                draft.error_message = "AI服务暂时不可用"
+            
+            draft.completed_at = datetime.now()
+            await db.commit()
+            
+        except Exception as e:
+            print(f"[process_ai_rewrite_ending] 异常: {e}")
+            import traceback
+            traceback.print_exc()
+            
+            try:
+                draft.status = DraftStatus.failed
+                draft.error_message = str(e)[:500]
+                draft.completed_at = datetime.now()
+                await db.commit()
+            except:
+                pass
+
+
+async def process_ai_continue_ending(draft_id: int):
+    """后台异步处理AI续写结局"""
+    from app.database import async_session_factory
+    from app.services.ai import ai_service
+    
+    async with async_session_factory() as db:
+        try:
+            # 获取草稿
+            result = await db.execute(select(StoryDraft).where(StoryDraft.id == draft_id))
+            draft = result.scalar_one_or_none()
+            
+            if not draft:
+                return
+            
+            # 更新状态为处理中
+            draft.status = DraftStatus.processing
+            await db.commit()
+            
+            # 获取故事信息
+            story_result = await db.execute(select(Story).where(Story.id == draft.story_id))
+            story = story_result.scalar_one_or_none()
+            
+            if not story:
+                draft.status = DraftStatus.failed
+                draft.error_message = "故事不存在"
+                draft.completed_at = datetime.now()
+                await db.commit()
+                return
+            
+            # 从 path_history 获取结局信息
+            ending_info = draft.path_history or {}
+            ending_name = ending_info.get("endingName", "未知结局")
+            ending_content = ending_info.get("endingContent", "")
+            
+            # 调用AI服务续写结局
+            ai_result = await ai_service.continue_ending(
+                story_title=story.title,
+                story_category=story.category or "未知",
+                ending_name=ending_name,
+                ending_content=ending_content,
+                user_prompt=draft.user_prompt
+            )
+            
+            if ai_result and ai_result.get("nodes"):
+                # 成功 - 存储多节点分支格式
+                draft.status = DraftStatus.completed
+                draft.ai_nodes = ai_result["nodes"]
+                draft.entry_node_key = ai_result.get("entryNodeKey", "continue_1")
+                draft.tokens_used = ai_result.get("tokens_used", 0)
+                draft.title = f"{story.title}-{ending_name}续写"
+            else:
+                draft.status = DraftStatus.failed
+                draft.error_message = "AI服务暂时不可用"
+            
+            draft.completed_at = datetime.now()
+            await db.commit()
+            
+        except Exception as e:
+            print(f"[process_ai_continue_ending] 异常: {e}")
+            import traceback
+            traceback.print_exc()
+            
+            try:
+                draft.status = DraftStatus.failed
+                draft.error_message = str(e)[:500]
+                draft.completed_at = datetime.now()
+                await db.commit()
+            except:
+                pass
+
+
 # ============ API 路由 ============
 
 @router.post("")
@@ -173,6 +359,96 @@ async def create_draft(
     }
 
 
+@router.post("/ending")
+async def create_ending_draft(
+    request: CreateEndingDraftRequest,
+    background_tasks: BackgroundTasks,
+    db: AsyncSession = Depends(get_db)
+):
+    """提交AI改写结局任务（异步处理）"""
+    if not request.prompt:
+        raise HTTPException(status_code=400, detail="请输入改写指令")
+    
+    # 获取故事信息
+    result = await db.execute(select(Story).where(Story.id == request.storyId))
+    story = result.scalar_one_or_none()
+    
+    if not story:
+        raise HTTPException(status_code=404, detail="故事不存在")
+    
+    # 创建草稿记录，将结局信息存在 path_history
+    draft = StoryDraft(
+        user_id=request.userId,
+        story_id=request.storyId,
+        title=f"{story.title}-结局改写",
+        path_history={"endingName": request.endingName, "endingContent": request.endingContent},
+        current_node_key="ending",
+        current_content=request.endingContent,
+        user_prompt=request.prompt,
+        status=DraftStatus.pending
+    )
+    
+    db.add(draft)
+    await db.commit()
+    await db.refresh(draft)
+    
+    # 添加后台任务
+    background_tasks.add_task(process_ai_rewrite_ending, draft.id)
+    
+    return {
+        "code": 0,
+        "data": {
+            "draftId": draft.id,
+            "message": "已提交，AI正在生成新结局..."
+        }
+    }
+
+
+@router.post("/continue-ending")
+async def create_continue_ending_draft(
+    request: ContinueEndingDraftRequest,
+    background_tasks: BackgroundTasks,
+    db: AsyncSession = Depends(get_db)
+):
+    """提交AI续写结局任务（异步处理）"""
+    if not request.prompt:
+        raise HTTPException(status_code=400, detail="请输入续写指令")
+    
+    # 获取故事信息
+    result = await db.execute(select(Story).where(Story.id == request.storyId))
+    story = result.scalar_one_or_none()
+    
+    if not story:
+        raise HTTPException(status_code=404, detail="故事不存在")
+    
+    # 创建草稿记录，将结局信息存在 path_history
+    draft = StoryDraft(
+        user_id=request.userId,
+        story_id=request.storyId,
+        title=f"{story.title}-结局续写",
+        path_history={"endingName": request.endingName, "endingContent": request.endingContent},
+        current_node_key="ending",
+        current_content=request.endingContent,
+        user_prompt=request.prompt,
+        status=DraftStatus.pending
+    )
+    
+    db.add(draft)
+    await db.commit()
+    await db.refresh(draft)
+    
+    # 添加后台任务
+    background_tasks.add_task(process_ai_continue_ending, draft.id)
+    
+    return {
+        "code": 0,
+        "data": {
+            "draftId": draft.id,
+            "message": "已提交，AI正在续写故事..."
+        }
+    }
+
+
 @router.get("")
 async def get_drafts(
     userId: int,

server/app/services/ai.py

@@ -274,6 +274,139 @@ class AIService:
             traceback.print_exc()
             return None
 
+    async def continue_ending(
+        self,
+        story_title: str,
+        story_category: str,
+        ending_name: str,
+        ending_content: str,
+        user_prompt: str
+    ) -> Optional[Dict[str, Any]]:
+        """
+        AI续写结局，从结局开始续写新的剧情分支
+        """
+        print(f"\n[continue_ending] ========== 开始调用 ==========")
+        print(f"[continue_ending] story_title={story_title}, category={story_category}")
+        print(f"[continue_ending] ending_name={ending_name}")
+        print(f"[continue_ending] user_prompt={user_prompt}")
+        print(f"[continue_ending] enabled={self.enabled}, api_key存在={bool(self.api_key)}")
+        
+        if not self.enabled or not self.api_key:
+            print(f"[continue_ending] 服务未启用或API Key为空，返回None")
+            return None
+
+        # 构建系统提示词
+        system_prompt = """你是一个专业的互动故事续写专家。用户已经到达故事的某个结局，现在想要从这个结局继续故事发展。
+
+【任务】
+请从这个结局开始，创作故事的延续。新剧情必须紧接结局内容，仿佛故事并没有在此结束，而是有了新的发展。
+
+【写作要求】
+1. 第一个节点必须紧密衔接原结局，像是结局之后自然发生的事
+2. 生成 4-6 个新节点，形成有层次的剧情发展（起承转合）
+3. 每个节点内容 150-300 字，要分 2-3 个自然段（用\\n\\n分隔），包含：场景描写、人物对话、心理活动
+4. 每个非结局节点有 2 个选项，选项要有明显的剧情差异和后果
+5. 严格符合用户的续写意图，围绕用户指令展开剧情
+6. 保持原故事的人物性格、语言风格和世界观
+7. 对话要自然生动，描写要有画面感
+
+【关于新结局 - 极其重要！】
+★★★ 每一条分支路径的尽头必须是新结局节点 ★★★
+- 结局节点必须设置 "is_ending": true
+- 结局内容要 200-400 字，分 2-3 段，有情感冲击力
+- 结局名称 4-8 字，体现剧情走向
+- 如果有2个选项分支，最终必须有2个不同的结局
+- 每个结局必须有 "ending_score" 评分（0-100）
+
+【输出格式】（严格JSON，不要有任何额外文字）
+{
+    "nodes": {
+        "continue_1": {
+            "content": "续写剧情第一段（150-300字）...",
+            "speaker": "旁白",
+            "choices": [
+                {"text": "选项A（5-15字）", "nextNodeKey": "continue_2a"},
+                {"text": "选项B（5-15字）", "nextNodeKey": "continue_2b"}
+            ]
+        },
+        "continue_2a": {
+            "content": "...",
+            "speaker": "旁白",
+            "choices": [
+                {"text": "选项C", "nextNodeKey": "continue_ending_good"},
+                {"text": "选项D", "nextNodeKey": "continue_ending_bad"}
+            ]
+        },
+        "continue_ending_good": {
+            "content": "新好结局内容（200-400字）...\\n\\n【达成结局：xxx】",
+            "speaker": "旁白",
+            "is_ending": true,
+            "ending_name": "新结局名称",
+            "ending_type": "good",
+            "ending_score": 90
+        },
+        "continue_ending_bad": {
+            "content": "新坏结局内容...\\n\\n【达成结局：xxx】",
+            "speaker": "旁白",
+            "is_ending": true,
+            "ending_name": "新结局名称", 
+            "ending_type": "bad",
+            "ending_score": 40
+        }
+    },
+    "entryNodeKey": "continue_1"
+}"""
+
+        # 构建用户提示词
+        user_prompt_text = f"""【原故事信息】
+故事标题：{story_title}
+故事分类：{story_category}
+
+【已达成的结局】
+结局名称：{ending_name}
+结局内容：{ending_content[:800]}
+
+【用户续写指令】
+{user_prompt}
+
+请从这个结局开始续写新的剧情分支（输出JSON格式）："""
+
+        print(f"[continue_ending] 提示词构建完成，开始调用AI...")
+
+        try:
+            result = None
+            if self.provider == "openai":
+                result = await self._call_openai_long(system_prompt, user_prompt_text)
+            elif self.provider == "claude":
+                result = await self._call_claude(f"{system_prompt}\n\n{user_prompt_text}")
+            elif self.provider == "qwen":
+                result = await self._call_qwen_long(system_prompt, user_prompt_text)
+            elif self.provider == "deepseek":
+                result = await self._call_deepseek_long(system_prompt, user_prompt_text)
+            
+            print(f"[continue_ending] AI调用完成，result存在={result is not None}")
+            
+            if result and result.get("content"):
+                print(f"[continue_ending] AI返回内容长度={len(result.get('content', ''))}")
+                
+                # 解析JSON响应（复用 rewrite_branch 的解析方法）
+                parsed = self._parse_branch_json(result["content"])
+                print(f"[continue_ending] JSON解析结果: parsed存在={parsed is not None}")
+                
+                if parsed:
+                    parsed["tokens_used"] = result.get("tokens_used", 0)
+                    print(f"[continue_ending] 成功! nodes数量={len(parsed.get('nodes', {}))}")
+                    return parsed
+                else:
+                    print(f"[continue_ending] JSON解析失败!")
+            
+            return None
+        except Exception as e:
+            print(f"[continue_ending] 异常: {type(e).__name__}: {e}")
+            import traceback
+            traceback.print_exc()
+            return None
+
     def _parse_branch_json(self, content: str) -> Optional[Dict]:
         """解析AI返回的分支JSON"""
         print(f"[_parse_branch_json] 开始解析，内容长度={len(content)}")