fix: prevent blocking calls in source __init__ methods

custom_components/waste_collection_schedule/config_flow.py

@@ -34,6 +34,7 @@
 )
 from homeassistant.helpers.translation import async_get_translations
 from voluptuous.schema_builder import UNDEFINED
+
 from waste_collection_schedule.collection import Collection
 from waste_collection_schedule.exceptions import (
     SourceArgumentException,
@@ -591,9 +592,7 @@ async def __get_arg_schema(
                         default=UNDEFINED if default is None else default,
                         description=description,
                     )
-                ] = (
-                    field_type or cv.string
-                )
+                ] = field_type or cv.string
             else:
                 _LOGGER.debug(
                     f"Unsupported type: {type(default)}: {arg_name}: {default}: {field_type}"
@@ -632,7 +631,10 @@ async def __validate_args_user_input(
         self._abort_if_unique_id_configured()
 
         try:
-            instance = module.Source(**args_input)
+            instance = await self.hass.async_add_executor_job(
+                self._get_source_instance, module, args_input
+            )
+
             resp: list[Collection] = await self.hass.async_add_executor_job(
                 instance.fetch
             )
@@ -666,6 +668,10 @@ async def __validate_args_user_input(
             description_placeholders["fetch_error_message"] = str(e)
         return errors, description_placeholders, options
 
+    def _get_source_instance(self, module, args_input: dict[str, Any]):
+        kwargs = args_input
+        return module.Source(**kwargs)
+
     async def async_source_selected(self) -> None:
         async def args_method(args_input):
             return await self.async_step_args(args_input)
@@ -778,9 +784,9 @@ async def async_step_customize(
             if user_input.get(CONF_DEDICATED_CALENDAR_TITLE, "") and not user_input.get(
                 CONF_USE_DEDICATED_CALENDAR, False
             ):
-                errors[
-                    CONF_DEDICATED_CALENDAR_TITLE
-                ] = "dedicated_calendar_title_without_use_dedicated_calendar"
+                errors[CONF_DEDICATED_CALENDAR_TITLE] = (
+                    "dedicated_calendar_title_without_use_dedicated_calendar"
+                )
             else:
                 if CONF_ALIAS in user_input:
                     self._fetched_types.remove(types[self._customize_index])