database.py

from sqlalchemy import create_engine, Column, Integer, String, DateTime, Enum
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from datetime import datetime
import enum

SQLALCHEMY_DATABASE_URL = "sqlite:///./chat.db"

engine = create_engine(
    SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()


class MessageType(enum.Enum):
    USER = "user"
    AI = "ai"


class Message(Base):
    __tablename__ = "messages"

    id = Column(Integer, primary_key=True, index=True)
    content = Column(String)
    type = Column(String)
    timestamp = Column(DateTime, default=datetime.utcnow)


class Document(Base):
    __tablename__ = "documents"

    id = Column(Integer, primary_key=True, index=True)
    title = Column(String)
    path = Column(String)
    timestamp = Column(DateTime, default=datetime.utcnow)


Base.metadata.create_all(bind=engine)


def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()