REFACT Switch to unified factory class

dmrtools/dmrproto/factory.py

@@ -0,0 +1,50 @@
+from abc import ABC, abstractmethod
+from typing import Self, Type, NoReturn
+
+from .exceptions import FactoryException
+
+
+class IFactoryProduced(ABC):
+    @abstractmethod
+    def __init__(self, data: bytes) -> None:
+        pass
+
+    @classmethod
+    @abstractmethod
+    def detect_by_data(cls, data: bytes) -> bool:
+        pass
+
+
+class BaseFactory(ABC):
+    __instance: Self|None = None
+
+    @classmethod
+    def fd(cls, data: bytes) -> IFactoryProduced:
+        """
+        Short singleton version of from_data method
+        """
+        if cls.__instance is None:
+            cls.__instance = cls()
+        return cls.__instance.from_data(data)
+
+    def __init__(self,
+                 classes: list[Type[IFactoryProduced]]|None = None) -> None:
+        self._classes: list[Type[IFactoryProduced]] = (
+            classes if classes is not None else [])
+
+    def register(self, cls: Type[IFactoryProduced]) -> None:
+        self._classes.append(cls)
+
+    def from_data(self, data: bytes) -> IFactoryProduced:
+        """
+        Attempts to create an instance of corresponding
+        IFactoryProduced-implementing class based on data
+        """
+        for cls in self._classes:
+            if cls.detect_by_data(data):
+                return cls(data)
+
+        self.not_found(data)
+
+    def not_found(self, data: bytes) -> NoReturn:
+        raise FactoryException(f"No class found for {data.hex()}")