Add checks for available meals before creating orders

The updates address issues with empty meal lists during order creation. When no meals are available, no orders will be created, returning empty lists instead. Furthermore, the mandatory meal assertion in the environment's validate_environment method has been commented out. The meal list in the level1 config has been updated to only include 'Burger'.

cooperative_cuisine/configs/study/level1/level1_config.yaml

@@ -14,8 +14,7 @@ meals:
   # if all: false -> only orders for these meals are generated
   # TODO: what if this list is empty?
   list:
-    - Salad
-    - TomatoSoup
+    - Burger
 
 layout_chars:
   _: Free

cooperative_cuisine/environment.py

@@ -229,7 +229,7 @@ class Environment:
         )
 
         meals_to_be_ordered = self.recipe_validation.validate_environment(self.counters)
-        assert meals_to_be_ordered, "Need possible meals for order generation."
+        # assert meals_to_be_ordered, "Need possible meals for order generation."
 
         available_meals = {meal: self.item_info[meal] for meal in meals_to_be_ordered}
         self.order_manager.set_available_meals(available_meals)

cooperative_cuisine/orders.py

@@ -379,11 +379,15 @@ class RandomOrderGeneration(OrderGeneration):
         self.number_cur_orders = self.kwargs.num_start_meals
         if not self.kwargs.sample_on_serving:
             self.create_random_next_time_delta(now)
-        return self.create_orders_for_meals(
-            self.random.choices(self.available_meals, k=self.kwargs.num_start_meals),
-            now,
-            self.kwargs.sample_on_serving,
-        )
+        if self.available_meals:
+            return self.create_orders_for_meals(
+                self.random.choices(
+                    self.available_meals, k=self.kwargs.num_start_meals
+                ),
+                now,
+                self.kwargs.sample_on_serving,
+            )
+        return []
 
     def get_orders(
         self,
@@ -392,6 +396,8 @@ class RandomOrderGeneration(OrderGeneration):
         new_finished_orders: list[Order],
         expired_orders: list[Order],
     ) -> list[Order]:
+        if not self.available_meals:
+            return []
         self.number_cur_orders -= len(new_finished_orders)
         self.number_cur_orders -= len(expired_orders)
         if self.kwargs.sample_on_serving:

cooperative_cuisine/validation.py

@@ -265,6 +265,8 @@ class Validation:
         # print("FINAL MEALS:", meals_to_be_ordered)
 
     def get_recipe_graphs(self) -> list[MealGraphDict]:
+        if not self.order_manager.available_meals:
+            return []
         os.makedirs(ROOT_DIR / "generated", exist_ok=True)
 
         # time_start = time.time()