229 lines
8.8 KiB
Python
229 lines
8.8 KiB
Python
"""Memoir service — 回忆录编排（章节生成、状态流转）；通过 MemoryService 获取 evidence。"""
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from app.core.logging import get_logger
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from typing import List, Optional
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from fastapi import HTTPException
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.orm import joinedload
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from app.agents.memoir.prompts import (
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CHAPTER_CATEGORIES,
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CHAPTER_ORDER,
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STAGE_TO_ORDER,
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)
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from app.features.memoir import repo
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from app.features.memoir.helpers import (
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chapter_to_dict,
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is_image_permanently_unavailable,
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)
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from app.features.memoir.models import Book, Chapter, ChapterSection
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from app.features.memory.service import MemoryService
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logger = get_logger(__name__)
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async def get_or_create_book(user_id: str, db: AsyncSession):
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"""Get the user's current book or return None."""
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return await repo.get_current_book(user_id, db)
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class MemoirService:
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def __init__(
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self,
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db: AsyncSession,
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memory_service: Optional[MemoryService] = None,
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):
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self._db = db
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self._memory = memory_service
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async def get_evidence(self, user_id: str, query: str, *, top_k: int = 10) -> dict:
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"""通过 MemoryService 获取检索证据（章节生成时优先使用）。"""
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if self._memory is None:
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return {
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"relevant_chunks": [],
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"relevant_summaries": [],
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"relevant_facts": [],
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"timeline_hints": [],
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}
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return await self._memory.retrieve(user_id, query, top_k=top_k)
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async def _cleanup_unavailable_images(self, ch: Chapter) -> None:
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sections = getattr(ch, "sections", None) or []
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cleaned = False
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for s in sections:
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rec = getattr(s, "image_record", None)
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if rec and is_image_permanently_unavailable(rec):
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logger.info("清理不可用配图: chapter=%s, section=%s", ch.id, s.id)
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s.image_id = None
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await self._db.delete(rec)
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cleaned = True
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if cleaned:
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await self._db.commit()
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await self._db.refresh(ch)
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async def get_current_book(self, user_id: str) -> dict:
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book = await repo.get_current_book(user_id, self._db)
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if not book:
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return {"message": "No book found"}
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return {
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"id": book.id,
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"title": book.title,
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"total_pages": book.total_pages,
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"total_words": book.total_words,
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"cover_image_url": book.cover_image_url,
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"has_update": book.has_update,
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"last_update_chapter_id": book.last_update_chapter_id,
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}
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async def clear_book_update(self, user_id: str) -> dict:
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book = await repo.get_current_book(user_id, self._db)
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if not book:
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return {"status": "ok", "message": "No book found"}
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book.has_update = False
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await self._db.commit()
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return {"status": "ok"}
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async def update_book(self, book_id: str, user_id: str, title: str) -> dict:
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book = await self._db.get(Book, book_id)
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if not book:
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raise HTTPException(status_code=404, detail="Book not found")
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if book.user_id != user_id:
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raise HTTPException(status_code=403, detail="无权更新此回忆录")
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book.title = title
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await self._db.commit()
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await self._db.refresh(book)
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return {
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"id": book.id,
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"title": book.title,
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"total_pages": book.total_pages,
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"total_words": book.total_words,
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"cover_image_url": book.cover_image_url,
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"has_update": book.has_update,
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"last_update_chapter_id": book.last_update_chapter_id,
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}
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async def export_pdf(self, user_id: str, book_id: str) -> dict:
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from app.features.memoir.pdf_service import pdf_service
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book = await self._db.get(Book, book_id)
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if not book:
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raise HTTPException(status_code=404, detail="Book not found")
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if book.user_id != user_id:
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raise HTTPException(status_code=403, detail="无权导出此回忆录")
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stmt = (
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select(Chapter)
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.where(Chapter.user_id == user_id, Chapter.is_active == True)
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.options(joinedload(Chapter.sections))
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.order_by(Chapter.order_index)
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)
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result = await self._db.execute(stmt)
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chapters = list(result.unique().scalars().all())
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pdf_bytes = await pdf_service.generate_pdf(book, chapters)
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return {
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"pdf_base64": pdf_bytes.decode("latin1"),
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"filename": f"{book.title}.pdf",
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}
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async def get_chapters(
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self, user_id: str, is_new: bool | None = None
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) -> List[dict]:
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chapters = await repo.get_chapters_with_sections(
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user_id, self._db, is_new_only=is_new
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)
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chapter_by_category: dict[str, Chapter] = {}
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for ch in chapters:
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if ch.category and ch.category not in chapter_by_category:
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chapter_by_category[ch.category] = ch
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all_chapters: List[dict] = []
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for category in CHAPTER_ORDER:
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ch = chapter_by_category.pop(category, None)
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if ch:
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await self._cleanup_unavailable_images(ch)
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all_chapters.append(chapter_to_dict(ch))
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else:
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if is_new is True:
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continue
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all_chapters.append({
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"id": f"placeholder_{category}",
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"title": CHAPTER_CATEGORIES[category],
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"content": "",
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"order_index": STAGE_TO_ORDER.get(category, 999),
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"status": "empty",
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"category": category,
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"images": [],
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"cover_image": None,
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"sections": [],
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"updated_at": None,
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"is_new": False,
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"source_segments": [],
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})
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for ch in chapter_by_category.values():
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await self._cleanup_unavailable_images(ch)
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all_chapters.append(chapter_to_dict(ch))
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return all_chapters
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async def get_chapter(self, chapter_id: str, user_id: str) -> dict:
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chapter = await repo.get_chapter_by_id(chapter_id, self._db)
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if not chapter:
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raise HTTPException(status_code=404, detail="Chapter not found")
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if chapter.user_id != user_id:
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raise HTTPException(status_code=403, detail="无权访问此章节")
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await self._cleanup_unavailable_images(chapter)
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return chapter_to_dict(chapter)
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async def disable_chapter(self, chapter_id: str, user_id: str) -> dict:
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chapter = await self._db.get(Chapter, chapter_id)
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if not chapter:
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raise HTTPException(status_code=404, detail="Chapter not found")
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if chapter.user_id != user_id:
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raise HTTPException(status_code=403, detail="无权操作此章节")
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chapter.is_active = False
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await self._db.commit()
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return {"status": "ok", "message": "章节已清除"}
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async def regenerate_chapter(self, chapter_id: str, user_id: str) -> dict:
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chapter = await self._db.get(Chapter, chapter_id)
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if not chapter:
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raise HTTPException(status_code=404, detail="Chapter not found")
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if chapter.user_id != user_id:
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raise HTTPException(status_code=403, detail="无权操作此章节")
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# TODO: 实现重新整理逻辑
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return {"status": "ok", "message": "Chapter regeneration triggered"}
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async def get_memoir_state(self, user_id: str) -> dict:
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from app.features.memoir.state_service import get_or_create_state
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state = await get_or_create_state(user_id, self._db)
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return state.model_dump()
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async def get_next_question_context(self, user_id: str) -> dict:
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from app.features.memoir.state_service import get_or_create_state
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state = await get_or_create_state(user_id, self._db)
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return {
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"current_stage": state.current_stage,
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"empty_slots": state.empty_slots_for_current_stage(),
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"covered_stages": state.covered_stages,
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}
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async def mark_memoir_read(self, user_id: str) -> dict:
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stmt = select(Chapter).where(
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Chapter.user_id == user_id, Chapter.is_new == True
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)
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result = await self._db.execute(stmt)
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for chapter in result.scalars().all():
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chapter.is_new = False
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stmt_book = (
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select(Book)
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.where(Book.user_id == user_id)
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.order_by(Book.updated_at.desc())
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)
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result_book = await self._db.execute(stmt_book)
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book = result_book.scalar_one_or_none()
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if book:
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book.has_update = False
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await self._db.commit()
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return {"status": "ok"}
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