root 656f596d7e feat: implement AI legal assistant system MVP
Core modules:
- Laws: CRUD, search, AI-powered QA
- Analysis: legal research and case management
- Contracts: lifecycle management with templates
- Signatures: electronic signature workflow

Infrastructure:
- FastAPI + SQLite + async SQLAlchemy
- Docker deployment support
- 54 unit tests passing

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-01 03:34:44 +08:00

138 lines
3.8 KiB
Python

"""Law service for CRUD operations."""
from datetime import date
from typing import List, Optional
from sqlalchemy import select, or_
from sqlalchemy.ext.asyncio import AsyncSession
from app.models.law import Law, LawArticle, LawType, LawStatus
class LawService:
"""Service for law CRUD operations."""
def __init__(self, db: AsyncSession):
self.db = db
async def create_law(
self,
title: str,
law_type: LawType,
promulgation_date: date,
effective_date: date,
issuing_authority: str,
content: str,
status: LawStatus = LawStatus.EFFECTIVE,
document_number: Optional[str] = None,
) -> Law:
"""Create a new law."""
law = Law(
title=title,
law_type=law_type,
promulgation_date=promulgation_date,
effective_date=effective_date,
status=status,
issuing_authority=issuing_authority,
content=content,
document_number=document_number,
)
self.db.add(law)
await self.db.flush()
await self.db.refresh(law)
return law
async def get_law_by_id(self, law_id: int) -> Optional[Law]:
"""Get a law by ID."""
result = await self.db.execute(
select(Law).where(Law.id == law_id)
)
return result.scalar_one_or_none()
async def get_laws_list(
self,
skip: int = 0,
limit: int = 20,
law_type: Optional[LawType] = None,
status: Optional[LawStatus] = None,
) -> List[Law]:
"""Get list of laws with optional filters."""
query = select(Law)
if law_type:
query = query.where(Law.law_type == law_type)
if status:
query = query.where(Law.status == status)
query = query.offset(skip).limit(limit).order_by(Law.created_at.desc())
result = await self.db.execute(query)
return list(result.scalars().all())
async def update_law(
self,
law_id: int,
**kwargs
) -> Optional[Law]:
"""Update a law."""
law = await self.get_law_by_id(law_id)
if not law:
return None
for key, value in kwargs.items():
if hasattr(law, key) and value is not None:
setattr(law, key, value)
await self.db.flush()
await self.db.refresh(law)
return law
async def delete_law(self, law_id: int) -> bool:
"""Delete a law."""
law = await self.get_law_by_id(law_id)
if not law:
return False
await self.db.delete(law)
await self.db.flush()
return True
async def search_laws_by_keyword(
self,
keyword: str,
limit: int = 10
) -> List[Law]:
"""Search laws by keyword in title or content."""
query = select(Law).where(
or_(
Law.title.contains(keyword),
Law.content.contains(keyword),
)
).limit(limit)
result = await self.db.execute(query)
return list(result.scalars().all())
async def create_article(
self,
law_id: int,
article_number: str,
content: str,
) -> LawArticle:
"""Create a law article."""
article = LawArticle(
law_id=law_id,
article_number=article_number,
content=content,
)
self.db.add(article)
await self.db.flush()
await self.db.refresh(article)
return article
async def get_articles_by_law_id(self, law_id: int) -> List[LawArticle]:
"""Get articles for a law."""
result = await self.db.execute(
select(LawArticle)
.where(LawArticle.law_id == law_id)
.order_by(LawArticle.id)
)
return list(result.scalars().all())