updated the architecture

app/middleware/auth.py

@@ -0,0 +1,71 @@
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer, APIKeyHeader
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+import hashlib
+
+from app.database import get_db
+from app.models.user import User
+from app.models.apikey import ApiKey
+from app.utils.auth import decode_access_token
+
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/auth/login", auto_error=False)
+api_key_header = APIKeyHeader(name="X-API-Key", auto_error=False)
+
+
+async def get_current_user(
+    token: str | None = Depends(oauth2_scheme),
+    api_key: str | None = Depends(api_key_header),
+    db: AsyncSession = Depends(get_db),
+) -> User:
+    if token:
+        user_id = decode_access_token(token)
+        if user_id:
+            result = await db.execute(select(User).where(User.id == user_id))
+            user = result.scalar_one_or_none()
+            if user:
+                return user
+
+    if api_key:
+        hashed_key = hashlib.sha256(api_key.encode()).hexdigest()
+        result = await db.execute(
+            select(User)
+            .join(ApiKey, User.id == ApiKey.user_id)
+            .where(ApiKey.hashed_key == hashed_key)
+        )
+        user = result.scalar_one_or_none()
+        if user:
+            return user
+
+    raise HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Invalid authentication credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+
+
+async def get_optional_user(
+    token: str | None = Depends(oauth2_scheme),
+    api_key: str | None = Depends(api_key_header),
+    db: AsyncSession = Depends(get_db),
+) -> User | None:
+    if token:
+        user_id = decode_access_token(token)
+        if user_id:
+            result = await db.execute(select(User).where(User.id == user_id))
+            user = result.scalar_one_or_none()
+            if user:
+                return user
+                
+    if api_key:
+        hashed_key = hashlib.sha256(api_key.encode()).hexdigest()
+        result = await db.execute(
+            select(User)
+            .join(ApiKey, User.id == ApiKey.user_id)
+            .where(ApiKey.hashed_key == hashed_key)
+        )
+        user = result.scalar_one_or_none()
+        if user:
+            return user
+
+    return None

app/middleware/rate_limiter.py

@@ -0,0 +1,6 @@
+from slowapi import Limiter
+from slowapi.util import get_remote_address
+
+from app.config import settings
+
+limiter = Limiter(key_func=get_remote_address, default_limits=[settings.rate_limit])