first prototype commit

backend/config.py

@@ -0,0 +1,32 @@
+import os
+import jwt
+from datetime import datetime, timedelta, timezone
+from typing import Optional
+
+SECRET_KEY = os.getenv("JWT_SECRET", "choreus-super-secret-key-2026-family-chores")
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_DAYS = 30
+
+GOOGLE_CLIENT_ID = os.getenv("GOOGLE_CLIENT_ID", "")
+
+def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.now(timezone.utc) + expires_delta
+    else:
+        expire = datetime.now(timezone.utc) + timedelta(days=ACCESS_TOKEN_EXPIRE_DAYS)
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+def decode_access_token(token: str) -> Optional[dict]:
+    try:
+        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+        return payload
+    except jwt.PyJWTError:
+        return None
+
+def get_current_week_identifier() -> str:
+    now = datetime.now(timezone.utc)
+    year, week, _ = now.isocalendar()
+    return f"{year}-W{week:02d}"