Enable strict typing for duckdns (home-assistant#108022)

.strict-typing

@@ -146,6 +146,7 @@ homeassistant.components.doorbird.*
 homeassistant.components.dormakaba_dkey.*
 homeassistant.components.downloader.*
 homeassistant.components.dsmr.*
+homeassistant.components.duckdns.*
 homeassistant.components.dunehd.*
 homeassistant.components.duotecno.*
 homeassistant.components.easyenergy.*

homeassistant/components/duckdns/__init__.py

@@ -1,9 +1,12 @@
 """Integrate with DuckDNS."""
-from collections.abc import Callable, Coroutine
+from __future__ import annotations
+
+from collections.abc import Callable, Coroutine, Sequence
 from datetime import datetime, timedelta
 import logging
-from typing import Any
+from typing import Any, cast
 
+from aiohttp import ClientSession
 import voluptuous as vol
 
 from homeassistant.const import CONF_ACCESS_TOKEN, CONF_DOMAIN
@@ -50,11 +53,11 @@
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Initialize the DuckDNS component."""
-    domain = config[DOMAIN][CONF_DOMAIN]
-    token = config[DOMAIN][CONF_ACCESS_TOKEN]
+    domain: str = config[DOMAIN][CONF_DOMAIN]
+    token: str = config[DOMAIN][CONF_ACCESS_TOKEN]
     session = async_get_clientsession(hass)
 
-    async def update_domain_interval(_now):
+    async def update_domain_interval(_now: datetime) -> bool:
         """Update the DuckDNS entry."""
         return await _update_duckdns(session, domain, token)
 
@@ -81,7 +84,14 @@ async def update_domain_service(call: ServiceCall) -> None:
 _SENTINEL = object()
 
 
-async def _update_duckdns(session, domain, token, *, txt=_SENTINEL, clear=False):
+async def _update_duckdns(
+    session: ClientSession,
+    domain: str,
+    token: str,
+    *,
+    txt: str | None | object = _SENTINEL,
+    clear: bool = False,
+) -> bool:
     """Update DuckDNS."""
     params = {"domains": domain, "token": token}
 
@@ -91,7 +101,7 @@ async def _update_duckdns(session, domain, token, *, txt=_SENTINEL, clear=False)
             params["txt"] = ""
             clear = True
         else:
-            params["txt"] = txt
+            params["txt"] = cast(str, txt)
 
     if clear:
         params["clear"] = "true"
@@ -111,11 +121,9 @@ async def _update_duckdns(session, domain, token, *, txt=_SENTINEL, clear=False)
 def async_track_time_interval_backoff(
     hass: HomeAssistant,
     action: Callable[[datetime], Coroutine[Any, Any, bool]],
-    intervals,
+    intervals: Sequence[timedelta],
 ) -> CALLBACK_TYPE:
     """Add a listener that fires repetitively at every timedelta interval."""
-    if not isinstance(intervals, (list, tuple)):
-        intervals = (intervals,)
     remove: CALLBACK_TYPE | None = None
     failed = 0
 

mypy.ini

@@ -1221,6 +1221,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.duckdns.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.dunehd.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true