Fix subscription bug and add auth for event creation

src/meal_manager/main.py

@@ -2,6 +2,7 @@ import locale
 import os
 from contextlib import asynccontextmanager
 from datetime import datetime, timedelta
+from functools import partial
 from typing import Annotated
 
 import starlette.status as status
@@ -34,15 +35,35 @@ def get_session():
     with Session(engine) as session:
         yield session
 
-def get_user(request: Request) -> dict | None:
+def get_user(request: Request, allow_none: bool=True) -> dict | None:
+    """
+    Retrieve user information from the incoming request.
+
+    This function attempts to extract user information from the request headers set by ssowat.
+    If allow_none is set to `True`, then a `None` value will be returned if no user information is found, else
+    an exception will be raised, resulting in a 401 Unauthorized response.
+
+    Used in UserDep and StrictUserDep.
+
+    :param request: The incoming HTTP request containing headers and other context
+                    information.
+    :param allow_none: Flag indicating whether returning `None` is permitted when
+                       user information is not available.
+    :return: A dictionary containing the username if found, or `None` if no user
+             information is available and `allow_none` is `True`.
+    :raises HTTPException: If user information is not found and `allow_none` is
+                            `False`.
+    """
     if os.environ.get("MEAL_MANAGER_FAKE_USER", False):
         return {"username": "fake_user"}
     if "ynh_user" in request.headers:
         return {
             "username": request.headers["ynh_user"],
         }
-    else:
+    if allow_none:
         return None
+    else:
+        raise HTTPException(status_code=401, detail="Not logged in")
 
 def create_db_and_tables():
     Base.metadata.create_all(engine)
@@ -62,6 +83,7 @@ templates = Jinja2Templates(directory="src/meal_manager/templates")
 SessionDep = Annotated[Session, Depends(get_session)]
 
 UserDep = Annotated[dict, Depends(get_user)]
+StrictUserDep = Annotated[dict, Depends(partial(get_user, allow_none=False))]
 @app.get("/")
 async def index(request: Request, session: SessionDep, user : UserDep):
     """Displays coming events and a button to register new ones"""
@@ -102,7 +124,7 @@ async def subscribe(request: Request, session: SessionDep):
     statement = select(Household)
     households = session.scalars(statement)
 
-    subscriptions = session.scalars(select(Subscription))
+    subscriptions = session.scalars(select(Subscription)).all()
 
     # filter out households with existing subscriptions
     households = [
@@ -165,14 +187,12 @@ async def delete_subscription(request: Request, session: SessionDep, household_i
 
 
 @app.get("/event/add")
-async def add_event_form(request: Request, user: UserDep):
+async def add_event_form(request: Request, user: StrictUserDep):
-    if not user:
-        raise HTTPException(status_code=401, detail="Only allowed for logged in users")
     return templates.TemplateResponse(request=request, name="add_event.html")
 
 
 @app.post("/event/add")
-async def add_event(request: Request, session: SessionDep):
+async def add_event(request: Request, session: SessionDep, user: StrictUserDep):
     form_data = await request.form()
 
     event_time = datetime.fromisoformat(form_data["eventTime"])