feat: first commit, auth

core/deps.py

@@ -0,0 +1,38 @@
+from datetime import UTC, datetime
+
+from fastapi import Depends, HTTPException
+from fastapi.security import OAuth2AuthorizationCodeBearer
+from pydantic import ValidationError
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from core.secrets import decode_jwt
+from db.models import User
+from db.session import get_db
+from repositories.users import UserRepository
+from schemas.jwt import JWTPayload
+
+oauth_scheme = OAuth2AuthorizationCodeBearer(
+    authorizationUrl="/auth/login", tokenUrl="/auth/refresh"
+)
+
+
+async def get_current_user(
+    session: AsyncSession = Depends(get_db), token: str = Depends(oauth_scheme)
+) -> User | None:
+    content = decode_jwt(token)
+
+    try:
+        payload = JWTPayload.model_validate(content)
+    except ValidationError:
+        raise HTTPException(status_code=401, detail="Invalid credentials") from None
+
+    if payload.exp < datetime.now(UTC).timestamp():
+        raise HTTPException(status_code=401, detail="Access token expired")
+
+    repo = UserRepository(session)
+    user = await repo.get_user_by_id(int(payload.sub))
+
+    if not user:
+        raise HTTPException(status_code=401, detail="User not found")
+
+    return user