Add type hints to rest integration (#80546)

homeassistant/components/rest/__init__.py

@@ -1,7 +1,9 @@
 """The rest component."""
+from __future__ import annotations
 
 import asyncio
 import contextlib
+from datetime import timedelta
 import logging
 
 import httpx
@@ -34,7 +36,7 @@ from homeassistant.helpers.reload import (
     async_integration_yaml_config,
     async_reload_integration_platforms,
 )
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
 
 from .const import COORDINATOR, DOMAIN, PLATFORM_IDX, REST, REST_DATA, REST_IDX
@@ -76,21 +78,22 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 
 @callback
-def _async_setup_shared_data(hass: HomeAssistant):
+def _async_setup_shared_data(hass: HomeAssistant) -> None:
     """Create shared data for platform config and rest coordinators."""
     hass.data[DOMAIN] = {key: [] for key in (REST_DATA, *COORDINATOR_AWARE_PLATFORMS)}
 
 
-async def _async_process_config(hass, config) -> bool:
+async def _async_process_config(hass: HomeAssistant, config: ConfigType) -> bool:
     """Process rest configuration."""
     if DOMAIN not in config:
         return True
 
     refresh_tasks = []
     load_tasks = []
-    for rest_idx, conf in enumerate(config[DOMAIN]):
-        scan_interval = conf.get(CONF_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL)
-        resource_template = conf.get(CONF_RESOURCE_TEMPLATE)
+    rest_config: list[ConfigType] = config[DOMAIN]
+    for rest_idx, conf in enumerate(rest_config):
+        scan_interval: timedelta = conf.get(CONF_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL)
+        resource_template: template.Template | None = conf.get(CONF_RESOURCE_TEMPLATE)
         rest = create_rest_data_from_config(hass, conf)
         coordinator = _rest_coordinator(hass, rest, resource_template, scan_interval)
         refresh_tasks.append(coordinator.async_refresh())
@@ -122,18 +125,25 @@ async def _async_process_config(hass, config) -> bool:
     return True
 
 
-async def async_get_config_and_coordinator(hass, platform_domain, discovery_info):
+async def async_get_config_and_coordinator(
+    hass: HomeAssistant, platform_domain: str, discovery_info: DiscoveryInfoType
+) -> tuple[ConfigType, DataUpdateCoordinator[None], RestData]:
     """Get the config and coordinator for the platform from discovery."""
     shared_data = hass.data[DOMAIN][REST_DATA][discovery_info[REST_IDX]]
-    conf = hass.data[DOMAIN][platform_domain][discovery_info[PLATFORM_IDX]]
-    coordinator = shared_data[COORDINATOR]
-    rest = shared_data[REST]
+    conf: ConfigType = hass.data[DOMAIN][platform_domain][discovery_info[PLATFORM_IDX]]
+    coordinator: DataUpdateCoordinator[None] = shared_data[COORDINATOR]
+    rest: RestData = shared_data[REST]
     if rest.data is None:
         await coordinator.async_request_refresh()
     return conf, coordinator, rest
 
 
-def _rest_coordinator(hass, rest, resource_template, update_interval):
+def _rest_coordinator(
+    hass: HomeAssistant,
+    rest: RestData,
+    resource_template: template.Template | None,
+    update_interval: timedelta,
+) -> DataUpdateCoordinator[None]:
     """Wrap a DataUpdateCoordinator around the rest object."""
     if resource_template:
 
@@ -154,33 +164,35 @@ def _rest_coordinator(hass, rest, resource_template, update_interval):
     )
 
 
-def create_rest_data_from_config(hass, config):
+def create_rest_data_from_config(hass: HomeAssistant, config: ConfigType) -> RestData:
     """Create RestData from config."""
-    resource = config.get(CONF_RESOURCE)
-    resource_template = config.get(CONF_RESOURCE_TEMPLATE)
-    method = config.get(CONF_METHOD)
-    payload = config.get(CONF_PAYLOAD)
-    verify_ssl = config.get(CONF_VERIFY_SSL)
-    username = config.get(CONF_USERNAME)
-    password = config.get(CONF_PASSWORD)
-    headers = config.get(CONF_HEADERS)
-    params = config.get(CONF_PARAMS)
-    timeout = config.get(CONF_TIMEOUT)
+    resource: str | None = config.get(CONF_RESOURCE)
+    resource_template: template.Template | None = config.get(CONF_RESOURCE_TEMPLATE)
+    method: str = config[CONF_METHOD]
+    payload: str | None = config.get(CONF_PAYLOAD)
+    verify_ssl: bool = config[CONF_VERIFY_SSL]
+    username: str | None = config.get(CONF_USERNAME)
+    password: str | None = config.get(CONF_PASSWORD)
+    headers: dict[str, str] | None = config.get(CONF_HEADERS)
+    params: dict[str, str] | None = config.get(CONF_PARAMS)
+    timeout: int = config[CONF_TIMEOUT]
 
     if resource_template is not None:
         resource_template.hass = hass
         resource = resource_template.async_render(parse_result=False)
 
+    if not resource:
+        raise HomeAssistantError("Resource not set for RestData")
+
     template.attach(hass, headers)
     template.attach(hass, params)
 
+    auth: httpx.DigestAuth | tuple[str, str] | None = None
     if username and password:
         if config.get(CONF_AUTHENTICATION) == HTTP_DIGEST_AUTHENTICATION:
             auth = httpx.DigestAuth(username, password)
         else:
             auth = (username, password)
-    else:
-        auth = None
 
     return RestData(
         hass, method, resource, auth, headers, params, payload, verify_ssl, timeout

homeassistant/components/rest/data.py

@@ -1,8 +1,11 @@
 """Support for RESTful API."""
+from __future__ import annotations
+
 import logging
 
 import httpx
 
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers import template
 from homeassistant.helpers.httpx_client import get_async_client
 
@@ -16,16 +19,16 @@ class RestData:
 
     def __init__(
         self,
-        hass,
-        method,
-        resource,
-        auth,
-        headers,
-        params,
-        data,
-        verify_ssl,
-        timeout=DEFAULT_TIMEOUT,
-    ):
+        hass: HomeAssistant,
+        method: str,
+        resource: str,
+        auth: httpx.DigestAuth | tuple[str, str] | None,
+        headers: dict[str, str] | None,
+        params: dict[str, str] | None,
+        data: str | None,
+        verify_ssl: bool,
+        timeout: int = DEFAULT_TIMEOUT,
+    ) -> None:
         """Initialize the data object."""
         self._hass = hass
         self._method = method
@@ -36,16 +39,16 @@ class RestData:
         self._request_data = data
         self._timeout = timeout
         self._verify_ssl = verify_ssl
-        self._async_client = None
-        self.data = None
-        self.last_exception = None
-        self.headers = None
+        self._async_client: httpx.AsyncClient | None = None
+        self.data: str | None = None
+        self.last_exception: Exception | None = None
+        self.headers: httpx.Headers | None = None
 
-    def set_url(self, url):
+    def set_url(self, url: str) -> None:
         """Set url."""
         self._resource = url
 
-    async def async_update(self, log_errors=True):
+    async def async_update(self, log_errors: bool = True) -> None:
         """Get the latest data from REST service with provided method."""
         if not self._async_client:
             self._async_client = get_async_client(