Get primaite session step working

src/primaite/game/agent/rewards.py

@@ -5,13 +5,30 @@ class AbstractReward():
     def __init__(self):
         ...
 
+    @abstractmethod
     def calculate(self, state:Dict) -> float:
         return 0.3
 
+class DummyReward(AbstractReward):
+
+    def calculate(self, state: Dict) -> float:
+        return -0.1
 
 class RewardFunction():
+    __rew_class_identifiers:Dict[str,type[AbstractReward]] = {
+        "DUMMY" : DummyReward
+    }
     def __init__(self, reward_function:AbstractReward):
         self.reward: AbstractReward = reward_function
 
     def calculate(self, state:Dict) -> float:
         return self.reward.calculate(state)
+
+    @classmethod
+    def from_config(cls, cfg:Dict) -> "RewardFunction":
+        for rew_component_cfg in cfg['reward_components']:
+            rew_type = rew_component_cfg['type']
+            rew_component = cls.__rew_class_identifiers[rew_type]()
+            new = cls(reward_function=rew_component)
+        return new
+