Initial project commit

server/app/core/deps.py

@@ -0,0 +1,69 @@
+from collections.abc import AsyncGenerator
+
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.security import decode_token
+from app.db.session import async_session_factory
+from app.models.user import User
+
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/v1/auth/login")
+
+
+async def get_db() -> AsyncGenerator[AsyncSession, None]:
+    async with async_session_factory() as session:
+        yield session
+
+
+async def get_current_user(
+    token: str = Depends(oauth2_scheme),
+    db: AsyncSession = Depends(get_db),
+) -> User:
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        payload = decode_token(token)
+        user_id: str | None = payload.get("sub")
+        if user_id is None or payload.get("type") != "access":
+            raise credentials_exception
+    except ValueError:
+        raise credentials_exception
+
+    result = await db.execute(select(User).where(User.id == int(user_id)))
+    user = result.scalar_one_or_none()
+    if user is None:
+        raise credentials_exception
+    return user
+
+
+async def get_current_active_user(
+    current_user: User = Depends(get_current_user),
+) -> User:
+    if not current_user.is_active:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="User account is disabled",
+        )
+    return current_user
+
+
+async def get_optional_current_user(
+    token: str | None = Depends(OAuth2PasswordBearer(tokenUrl="/api/v1/auth/login", auto_error=False)),
+    db: AsyncSession = Depends(get_db),
+) -> User | None:
+    if not token:
+        return None
+    try:
+        payload = decode_token(token)
+        user_id = payload.get("sub")
+        if user_id is None or payload.get("type") != "access":
+            return None
+    except ValueError:
+        return None
+    result = await db.execute(select(User).where(User.id == int(user_id)))
+    return result.scalar_one_or_none()