New metrics (#159)

* Add metrics to support automations, templating of data transfer and configuration responses

* change to using extra_attr because of size

Author: drc38

custom_components/ocpp/api.py

@@ -632,6 +632,10 @@ async def data_transfer(self, vendor_id: str, message_id: str = "", data: str =
                 data,
                 resp.data,
             )
+            self._metrics[cdet.data_response.value].value = datetime.now(
+                tz=timezone.utc
+            ).isoformat()
+            self._metrics[cdet.data_response.value].extra_attr = {message_id: resp.data}
             return True
         else:
             _LOGGER.warning("Failed with response: %s", resp.status)
@@ -647,6 +651,10 @@ async def get_configuration(self, key: str = ""):
         if resp.configuration_key is not None:
             value = resp.configuration_key[0][om.value.value]
             _LOGGER.debug("Get Configuration for %s: %s", key, value)
+            self._metrics[cdet.config_response.value].value = datetime.now(
+                tz=timezone.utc
+            ).isoformat()
+            self._metrics[cdet.config_response.value].extra_attr = {key: value}
             return value
         if resp.unknown_key is not None:
             _LOGGER.warning("Get Configuration returned unknown key for: %s", key)

custom_components/ocpp/enums.py

@@ -42,6 +42,8 @@ class HAChargerDetails(str, Enum):
     firmware_version = "FW.Version"
     features = "Features"
     connectors = "Connectors"
+    data_response = "Data.Response"
+    config_response = "Config.Response"
 
 
 class HAChargerSession(str, Enum):