re-structure code

app/dependencies/__init__.py

@@ -0,0 +1,2 @@
+from .database import get_db as get_db
+from .user import get_current_user as get_current_user

app/dependencies/database.py

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+from __future__ import annotations
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+try:
+    import redis
+except ImportError:
+    redis = None
+from app.config import settings
+
+# 数据库引擎
+engine = create_engine(settings.DATABASE_URL)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+# Redis 连接
+if redis:
+    redis_client = redis.from_url(settings.REDIS_URL, decode_responses=True)
+else:
+    redis_client = None
+
+
+# 数据库依赖
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+# Redis 依赖
+def get_redis():
+    return redis_client

app/dependencies/user.py

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+from fastapi import Depends, HTTPException
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+from sqlalchemy.orm import Session
+
+from app.auth import get_token_by_access_token
+
+from .database import get_db
+from app.database import (
+    User as DBUser,
+)
+
+security = HTTPBearer()
+
+
+async def get_current_user(
+    credentials: HTTPAuthorizationCredentials = Depends(security),
+    db: Session = Depends(get_db),
+) -> DBUser:
+    """获取当前认证用户"""
+    token = credentials.credentials
+
+    # 验证令牌
+    token_record = get_token_by_access_token(db, token)
+    if not token_record:
+        raise HTTPException(status_code=401, detail="Invalid or expired token")
+
+    # 获取用户
+    user = db.query(DBUser).filter(DBUser.id == token_record.user_id).first()
+    if not user:
+        raise HTTPException(status_code=404, detail="User not found")
+
+    return user