xiamuceer
645 lines
25 KiB
Python
645 lines
25 KiB
Python
"""大纲剧情展开服务 - 将大纲节点展开为多个章节"""
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from typing import List, Dict, Any, Optional
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy import select, func
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import json
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from app.models.outline import Outline
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from app.models.project import Project
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from app.models.character import Character
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from app.models.chapter import Chapter
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from app.services.ai_service import AIService
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from app.services.prompt_service import prompt_service, PromptService
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from app.logger import get_logger
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logger = get_logger(__name__)
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class PlotExpansionService:
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"""大纲剧情展开服务"""
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def __init__(self, ai_service: AIService):
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self.ai_service = ai_service
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async def analyze_outline_for_chapters(
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self,
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outline: Outline,
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project: Project,
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db: AsyncSession,
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target_chapter_count: int = 3,
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expansion_strategy: str = "balanced",
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enable_scene_analysis: bool = True,
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provider: Optional[str] = None,
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model: Optional[str] = None,
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batch_size: int = 5,
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progress_callback: Optional[callable] = None
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) -> List[Dict[str, Any]]:
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"""
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分析单个大纲,生成多章节规划（支持分批生成）
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Args:
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outline: 大纲对象
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project: 项目对象
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db: 数据库会话
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target_chapter_count: 目标生成章节数
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expansion_strategy: 展开策略(balanced/climax/detail)
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enable_scene_analysis: 是否启用场景级分析
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provider: AI提供商
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model: AI模型
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batch_size: 每批生成的章节数（默认5章）
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progress_callback: 进度回调函数(可选)
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Returns:
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章节规划列表
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"""
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logger.info(f"开始分析大纲 {outline.id}，目标生成 {target_chapter_count} 章")
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# 如果章节数较少，直接生成
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if target_chapter_count <= batch_size:
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return await self._generate_chapters_single_batch(
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outline=outline,
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project=project,
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db=db,
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target_chapter_count=target_chapter_count,
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expansion_strategy=expansion_strategy,
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enable_scene_analysis=enable_scene_analysis,
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provider=provider,
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model=model
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)
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# 章节数较多，分批生成
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logger.info(f"章节数({target_chapter_count})超过批次大小({batch_size})，启用分批生成")
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return await self._generate_chapters_in_batches(
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outline=outline,
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project=project,
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db=db,
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target_chapter_count=target_chapter_count,
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expansion_strategy=expansion_strategy,
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enable_scene_analysis=enable_scene_analysis,
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provider=provider,
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model=model,
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batch_size=batch_size,
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progress_callback=progress_callback
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)
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async def _generate_chapters_single_batch(
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self,
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outline: Outline,
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project: Project,
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db: AsyncSession,
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target_chapter_count: int,
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expansion_strategy: str,
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enable_scene_analysis: bool,
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provider: Optional[str],
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model: Optional[str]
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) -> List[Dict[str, Any]]:
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"""单批次生成章节规划"""
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# 获取角色信息
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characters_result = await db.execute(
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select(Character).where(Character.project_id == project.id)
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)
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characters = characters_result.scalars().all()
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characters_info = "\n".join([
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f"- {char.name} ({'组织' if char.is_organization else '角色'}, {char.role_type}): "
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f"{char.personality[:100] if char.personality else '暂无描述'}"
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for char in characters
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])
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# 获取大纲上下文（前后大纲）
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context_info = await self._get_outline_context(outline, project.id, db)
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# 获取自定义提示词模板
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template = await PromptService.get_template("OUTLINE_EXPAND_SINGLE", project.user_id, db)
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# 格式化提示词
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prompt = PromptService.format_prompt(
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template,
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project_title=project.title,
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project_genre=project.genre or '通用',
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project_theme=project.theme or '未设定',
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project_narrative_perspective=project.narrative_perspective or '第三人称',
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project_world_time_period=project.world_time_period or '未设定',
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project_world_location=project.world_location or '未设定',
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project_world_atmosphere=project.world_atmosphere or '未设定',
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characters_info=characters_info or '暂无角色',
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outline_order_index=outline.order_index,
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outline_title=outline.title,
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outline_content=outline.content,
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context_info=context_info,
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strategy_instruction=expansion_strategy,
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target_chapter_count=target_chapter_count,
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scene_instruction="", # 暂时为空
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scene_field="" # 暂时为空
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)
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# 调用AI生成章节规划
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logger.info(f"调用AI生成章节规划...")
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accumulated_text = ""
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async for chunk in self.ai_service.generate_text_stream(
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prompt=prompt,
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provider=provider,
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model=model
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):
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accumulated_text += chunk
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# 提取内容
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ai_content = accumulated_text
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# 解析AI响应
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chapter_plans = self._parse_expansion_response(ai_content, outline.id)
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logger.info(f"成功生成 {len(chapter_plans)} 个章节规划")
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return chapter_plans
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async def _generate_chapters_in_batches(
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self,
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outline: Outline,
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project: Project,
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db: AsyncSession,
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target_chapter_count: int,
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expansion_strategy: str,
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enable_scene_analysis: bool,
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provider: Optional[str],
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model: Optional[str],
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batch_size: int,
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progress_callback: Optional[callable]
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) -> List[Dict[str, Any]]:
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"""分批生成章节规划"""
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# 计算批次数
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total_batches = (target_chapter_count + batch_size - 1) // batch_size
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logger.info(f"分批生成计划: 总共{target_chapter_count}章，分{total_batches}批，每批{batch_size}章")
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# 获取角色信息（所有批次共用）
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characters_result = await db.execute(
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select(Character).where(Character.project_id == project.id)
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)
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characters = characters_result.scalars().all()
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characters_info = "\n".join([
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f"- {char.name} ({'组织' if char.is_organization else '角色'}, {char.role_type}): "
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f"{char.personality[:100] if char.personality else '暂无描述'}"
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for char in characters
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])
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# 获取大纲上下文
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context_info = await self._get_outline_context(outline, project.id, db)
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all_chapter_plans = []
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for batch_num in range(total_batches):
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# 计算当前批次的章节数
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remaining_chapters = target_chapter_count - len(all_chapter_plans)
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current_batch_size = min(batch_size, remaining_chapters)
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current_start_index = len(all_chapter_plans) + 1
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logger.info(f"开始生成第{batch_num + 1}/{total_batches}批，章节范围: {current_start_index}-{current_start_index + current_batch_size - 1}")
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# 回调通知进度
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if progress_callback:
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await progress_callback(batch_num + 1, total_batches, current_start_index, current_batch_size)
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# 构建当前批次的提示词（包含已生成章节的上下文）
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previous_context = ""
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if all_chapter_plans:
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previous_summaries = []
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for ch in all_chapter_plans[-3:]: # 只显示最近3章
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previous_summaries.append(
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f"第{ch['sub_index']}节《{ch['title']}》: {ch['plot_summary'][:100]}..."
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)
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previous_context = f"""
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【已生成章节概要】（接续生成，注意衔接）
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{chr(10).join(previous_summaries)}
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⚠️ 当前是第{current_start_index}-{current_start_index + current_batch_size - 1}节（共{target_chapter_count}节中的一部分）
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"""
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# 获取自定义提示词模板
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template = await PromptService.get_template("OUTLINE_EXPAND_MULTI", project.user_id, db)
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# 格式化提示词
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prompt = PromptService.format_prompt(
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template,
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project_title=project.title,
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project_genre=project.genre or '通用',
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project_theme=project.theme or '未设定',
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project_narrative_perspective=project.narrative_perspective or '第三人称',
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project_world_time_period=project.world_time_period or '未设定',
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project_world_location=project.world_location or '未设定',
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project_world_atmosphere=project.world_atmosphere or '未设定',
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characters_info=characters_info or '暂无角色',
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outline_order_index=outline.order_index,
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outline_title=outline.title,
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outline_content=outline.content,
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context_info=context_info,
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previous_context=previous_context,
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strategy_instruction=expansion_strategy,
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start_index=current_start_index,
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end_index=current_start_index + current_batch_size - 1,
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target_chapter_count=current_batch_size,
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scene_instruction="", # 暂时为空
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scene_field="" # 暂时为空
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)
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# 调用AI生成当前批次
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logger.info(f"调用AI生成第{batch_num + 1}批...")
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accumulated_text = ""
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async for chunk in self.ai_service.generate_text_stream(
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prompt=prompt,
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provider=provider,
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model=model
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):
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accumulated_text += chunk
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# 提取内容
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ai_content = accumulated_text
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# 解析AI响应
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batch_plans = self._parse_expansion_response(ai_content, outline.id)
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# 调整sub_index以保持连续性
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for i, plan in enumerate(batch_plans):
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plan["sub_index"] = current_start_index + i
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all_chapter_plans.extend(batch_plans)
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logger.info(f"第{batch_num + 1}批生成完成，本批生成{len(batch_plans)}章，累计{len(all_chapter_plans)}章")
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logger.info(f"分批生成完成，共生成 {len(all_chapter_plans)} 个章节规划")
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return all_chapter_plans
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async def batch_expand_outlines(
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self,
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project_id: str,
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db: AsyncSession,
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ai_service: AIService,
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target_chapters_per_outline: int = 3,
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expansion_strategy: str = "balanced",
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provider: Optional[str] = None,
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model: Optional[str] = None
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) -> Dict[str, Any]:
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"""
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批量展开所有大纲为章节
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Returns:
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{
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"total_outlines": 总大纲数,
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"total_chapters_planned": 规划的总章节数,
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"expansions": [每个大纲的展开结果]
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}
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"""
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logger.info(f"开始批量展开项目 {project_id} 的所有大纲")
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# 获取项目
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project_result = await db.execute(
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select(Project).where(Project.id == project_id)
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)
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project = project_result.scalar_one_or_none()
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if not project:
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raise ValueError(f"项目 {project_id} 不存在")
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# 获取所有大纲
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outlines_result = await db.execute(
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select(Outline)
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.where(Outline.project_id == project_id)
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.order_by(Outline.order_index)
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)
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outlines = outlines_result.scalars().all()
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if not outlines:
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logger.warning(f"项目 {project_id} 没有大纲")
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return {
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"total_outlines": 0,
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"total_chapters_planned": 0,
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"expansions": []
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}
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# 逐个展开大纲
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expansions = []
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total_chapters = 0
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for outline in outlines:
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try:
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chapter_plans = await self.analyze_outline_for_chapters(
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outline=outline,
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project=project,
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db=db,
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target_chapter_count=target_chapters_per_outline,
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expansion_strategy=expansion_strategy,
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provider=provider,
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model=model
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)
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expansions.append({
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"outline_id": outline.id,
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"outline_title": outline.title,
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"chapter_plans": chapter_plans,
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"chapter_count": len(chapter_plans)
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})
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total_chapters += len(chapter_plans)
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logger.info(f"大纲 {outline.title} 展开为 {len(chapter_plans)} 章")
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except Exception as e:
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logger.error(f"展开大纲 {outline.id} 失败: {str(e)}")
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expansions.append({
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"outline_id": outline.id,
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"outline_title": outline.title,
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"error": str(e),
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"chapter_count": 0
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})
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result = {
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"total_outlines": len(outlines),
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"total_chapters_planned": total_chapters,
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"expansions": expansions
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}
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logger.info(f"批量展开完成: {len(outlines)} 个大纲 → {total_chapters} 个章节规划")
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return result
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async def create_chapters_from_plans(
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self,
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outline_id: str,
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chapter_plans: List[Dict[str, Any]],
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project_id: str,
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db: AsyncSession,
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start_chapter_number: int = None
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) -> List[Chapter]:
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"""
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根据章节规划创建实际的章节记录
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Args:
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outline_id: 大纲ID
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chapter_plans: 章节规划列表
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project_id: 项目ID
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db: 数据库会话
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start_chapter_number: 起始章节号（如果为None，则自动计算）
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Returns:
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创建的章节列表
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"""
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logger.info(f"根据规划创建 {len(chapter_plans)} 个章节记录")
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# 如果没有指定起始章节号，根据大纲顺序自动计算
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if start_chapter_number is None:
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# 1. 获取当前大纲信息
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outline_result = await db.execute(
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select(Outline).where(Outline.id == outline_id)
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)
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current_outline = outline_result.scalar_one_or_none()
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if not current_outline:
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raise ValueError(f"大纲 {outline_id} 不存在")
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# 2. 查询所有在当前大纲之前的大纲（按order_index排序）
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prev_outlines_result = await db.execute(
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select(Outline)
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.where(
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Outline.project_id == project_id,
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Outline.order_index < current_outline.order_index
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)
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.order_by(Outline.order_index)
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)
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prev_outlines = prev_outlines_result.scalars().all()
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# 3. 计算前面所有大纲已展开的章节总数
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total_prev_chapters = 0
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for prev_outline in prev_outlines:
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count_result = await db.execute(
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select(func.count(Chapter.id))
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.where(
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Chapter.project_id == project_id,
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Chapter.outline_id == prev_outline.id
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)
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)
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total_prev_chapters += count_result.scalar() or 0
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# 4. 起始章节号 = 前面所有大纲的章节数 + 1
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start_chapter_number = total_prev_chapters + 1
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logger.info(f"自动计算起始章节号: {start_chapter_number} (基于大纲order_index={current_outline.order_index}, 前置章节数={total_prev_chapters})")
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chapters = []
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for idx, plan in enumerate(chapter_plans):
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# 保存完整的展开规划数据（JSON格式）
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expansion_plan_json = json.dumps({
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"key_events": plan.get("key_events", []),
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"character_focus": plan.get("character_focus", []),
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"emotional_tone": plan.get("emotional_tone", ""),
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"narrative_goal": plan.get("narrative_goal", ""),
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"conflict_type": plan.get("conflict_type", ""),
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"estimated_words": plan.get("estimated_words", 3000),
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"scenes": plan.get("scenes", []) if plan.get("scenes") else None
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}, ensure_ascii=False)
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chapter = Chapter(
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project_id=project_id,
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outline_id=outline_id,
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chapter_number=start_chapter_number + idx,
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sub_index=plan.get("sub_index", idx + 1),
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title=plan.get("title", f"第{start_chapter_number + idx}章"),
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summary=plan.get("plot_summary", ""),
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expansion_plan=expansion_plan_json,
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status="draft"
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)
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db.add(chapter)
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chapters.append(chapter)
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await db.commit()
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for chapter in chapters:
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await db.refresh(chapter)
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logger.info(f"成功创建 {len(chapters)} 个章节记录（已保存展开规划数据）")
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# 重新排序当前大纲之后的所有章节
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await self._renumber_subsequent_chapters(
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project_id=project_id,
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current_outline_id=outline_id,
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db=db
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)
|
|
|
|
return chapters
|
|
|
|
async def _get_outline_context(
|
|
self,
|
|
outline: Outline,
|
|
project_id: str,
|
|
db: AsyncSession
|
|
) -> str:
|
|
"""获取大纲的上下文（前后大纲）"""
|
|
# 获取前一个大纲
|
|
prev_result = await db.execute(
|
|
select(Outline)
|
|
.where(
|
|
Outline.project_id == project_id,
|
|
Outline.order_index < outline.order_index
|
|
)
|
|
.order_by(Outline.order_index.desc())
|
|
.limit(1)
|
|
)
|
|
prev_outline = prev_result.scalar_one_or_none()
|
|
|
|
# 获取后一个大纲
|
|
next_result = await db.execute(
|
|
select(Outline)
|
|
.where(
|
|
Outline.project_id == project_id,
|
|
Outline.order_index > outline.order_index
|
|
)
|
|
.order_by(Outline.order_index)
|
|
.limit(1)
|
|
)
|
|
next_outline = next_result.scalar_one_or_none()
|
|
|
|
context = ""
|
|
if prev_outline:
|
|
context += f"【前一节】{prev_outline.title}: {prev_outline.content[:200]}...\n\n"
|
|
if next_outline:
|
|
context += f"【后一节】{next_outline.title}: {next_outline.content[:200]}...\n"
|
|
|
|
return context if context else "（无前后文）"
|
|
|
|
|
|
def _parse_expansion_response(
|
|
self,
|
|
ai_response: str,
|
|
outline_id: str
|
|
) -> List[Dict[str, Any]]:
|
|
"""解析AI的展开响应（使用统一的JSON清洗方法）"""
|
|
try:
|
|
# 使用统一的JSON清洗方法
|
|
cleaned_text = self.ai_service._clean_json_response(ai_response)
|
|
|
|
# 解析JSON
|
|
chapter_plans = json.loads(cleaned_text)
|
|
|
|
# 确保是列表
|
|
if not isinstance(chapter_plans, list):
|
|
chapter_plans = [chapter_plans]
|
|
|
|
# 为每个章节规划添加outline_id
|
|
for plan in chapter_plans:
|
|
plan["outline_id"] = outline_id
|
|
|
|
logger.info(f"✅ 成功解析 {len(chapter_plans)} 个章节规划")
|
|
return chapter_plans
|
|
|
|
except json.JSONDecodeError as e:
|
|
logger.error(f"❌ 解析AI响应失败: {e}, 响应内容: {ai_response[:500]}")
|
|
# 返回一个基础规划
|
|
return [{
|
|
"outline_id": outline_id,
|
|
"sub_index": 1,
|
|
"title": "AI解析失败的默认章节",
|
|
"plot_summary": ai_response[:500],
|
|
"key_events": ["解析失败"],
|
|
"character_focus": [],
|
|
"emotional_tone": "未知",
|
|
"narrative_goal": "需要重新生成",
|
|
"conflict_type": "未知",
|
|
"estimated_words": 3000
|
|
}]
|
|
except Exception as e:
|
|
logger.error(f"❌ 解析异常: {str(e)}")
|
|
return [{
|
|
"outline_id": outline_id,
|
|
"sub_index": 1,
|
|
"title": "解析异常的默认章节",
|
|
"plot_summary": "系统错误",
|
|
"key_events": [],
|
|
"character_focus": [],
|
|
"emotional_tone": "未知",
|
|
"narrative_goal": "需要重新生成",
|
|
"conflict_type": "未知",
|
|
"estimated_words": 3000
|
|
}]
|
|
|
|
|
|
async def _renumber_subsequent_chapters(
|
|
self,
|
|
project_id: str,
|
|
current_outline_id: str,
|
|
db: AsyncSession
|
|
):
|
|
"""
|
|
重新计算当前大纲之后所有大纲的章节序号
|
|
|
|
Args:
|
|
project_id: 项目ID
|
|
current_outline_id: 当前大纲ID
|
|
db: 数据库会话
|
|
"""
|
|
logger.info(f"开始重新排序大纲 {current_outline_id} 之后的所有章节")
|
|
|
|
# 1. 获取当前大纲信息
|
|
current_outline_result = await db.execute(
|
|
select(Outline).where(Outline.id == current_outline_id)
|
|
)
|
|
current_outline = current_outline_result.scalar_one_or_none()
|
|
|
|
if not current_outline:
|
|
logger.warning(f"大纲 {current_outline_id} 不存在，跳过重新排序")
|
|
return
|
|
|
|
# 2. 获取当前大纲及之后的所有大纲（按order_index排序）
|
|
subsequent_outlines_result = await db.execute(
|
|
select(Outline)
|
|
.where(
|
|
Outline.project_id == project_id,
|
|
Outline.order_index >= current_outline.order_index
|
|
)
|
|
.order_by(Outline.order_index)
|
|
)
|
|
subsequent_outlines = subsequent_outlines_result.scalars().all()
|
|
|
|
# 3. 计算每个大纲的起始章节号
|
|
current_chapter_number = 1
|
|
|
|
# 先计算前面大纲的章节总数
|
|
prev_outlines_result = await db.execute(
|
|
select(Outline)
|
|
.where(
|
|
Outline.project_id == project_id,
|
|
Outline.order_index < current_outline.order_index
|
|
)
|
|
.order_by(Outline.order_index)
|
|
)
|
|
prev_outlines = prev_outlines_result.scalars().all()
|
|
|
|
for prev_outline in prev_outlines:
|
|
count_result = await db.execute(
|
|
select(func.count(Chapter.id))
|
|
.where(
|
|
Chapter.project_id == project_id,
|
|
Chapter.outline_id == prev_outline.id
|
|
)
|
|
)
|
|
current_chapter_number += count_result.scalar() or 0
|
|
|
|
# 4. 逐个大纲更新章节序号
|
|
updated_count = 0
|
|
for outline in subsequent_outlines:
|
|
# 获取该大纲的所有章节（按sub_index排序）
|
|
chapters_result = await db.execute(
|
|
select(Chapter)
|
|
.where(
|
|
Chapter.project_id == project_id,
|
|
Chapter.outline_id == outline.id
|
|
)
|
|
.order_by(Chapter.sub_index)
|
|
)
|
|
chapters = chapters_result.scalars().all()
|
|
|
|
# 更新每个章节的chapter_number
|
|
for chapter in chapters:
|
|
if chapter.chapter_number != current_chapter_number:
|
|
logger.debug(f"更新章节 {chapter.id}: {chapter.chapter_number} -> {current_chapter_number}")
|
|
chapter.chapter_number = current_chapter_number
|
|
updated_count += 1
|
|
current_chapter_number += 1
|
|
|
|
# 5. 提交更新
|
|
await db.commit()
|
|
logger.info(f"重新排序完成，共更新 {updated_count} 个章节的序号")
|
|
|
|
|
|
# 工厂函数
|
|
def create_plot_expansion_service(ai_service: AIService) -> PlotExpansionService:
|
|
"""创建剧情展开服务实例"""
|
|
return PlotExpansionService(ai_service) |