Improve config flow for GIOS (#139935)

* Initial commit

* Use TYPE_CHECKING

* Update strings

* Remove default value

* Improve tests

homeassistant/components/gios/config_flow.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import asyncio
-from typing import Any
+from typing import TYPE_CHECKING, Any
 
 from aiohttp.client_exceptions import ClientConnectorError
 from gios import ApiError, Gios, InvalidSensorsDataError, NoStationError
@@ -12,6 +12,12 @@ import voluptuous as vol
 from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
 from homeassistant.const import CONF_NAME
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
+from homeassistant.helpers.selector import (
+    SelectOptionDict,
+    SelectSelector,
+    SelectSelectorConfig,
+    SelectSelectorMode,
+)
 
 from .const import API_TIMEOUT, CONF_STATION_ID, DOMAIN
 
@@ -27,40 +33,59 @@ class GiosFlowHandler(ConfigFlow, domain=DOMAIN):
         """Handle a flow initialized by the user."""
         errors = {}
 
-        if user_input is not None:
-            try:
-                await self.async_set_unique_id(
-                    str(user_input[CONF_STATION_ID]), raise_on_progress=False
-                )
-                self._abort_if_unique_id_configured()
-
         websession = async_get_clientsession(self.hass)
 
+        if user_input is not None:
+            station_id = user_input[CONF_STATION_ID]
+
+            try:
+                await self.async_set_unique_id(station_id, raise_on_progress=False)
+                self._abort_if_unique_id_configured()
+
                 async with asyncio.timeout(API_TIMEOUT):
-                    gios = await Gios.create(websession, user_input[CONF_STATION_ID])
+                    gios = await Gios.create(websession, int(station_id))
                     await gios.async_update()
 
+                # GIOS treats station ID as int
+                user_input[CONF_STATION_ID] = int(station_id)
+
+                if TYPE_CHECKING:
                     assert gios.station_name is not None
+
                 return self.async_create_entry(
                     title=gios.station_name,
                     data=user_input,
                 )
             except (ApiError, ClientConnectorError, TimeoutError):
                 errors["base"] = "cannot_connect"
-            except NoStationError:
-                errors[CONF_STATION_ID] = "wrong_station_id"
             except InvalidSensorsDataError:
                 errors[CONF_STATION_ID] = "invalid_sensors_data"
 
+        try:
+            gios = await Gios.create(websession)
+        except (ApiError, ClientConnectorError, NoStationError):
+            return self.async_abort(reason="cannot_connect")
+
+        options: list[SelectOptionDict] = [
+            SelectOptionDict(value=str(station.id), label=station.name)
+            for station in gios.measurement_stations.values()
+        ]
+
+        schema: vol.Schema = vol.Schema(
+            {
+                vol.Required(CONF_STATION_ID): SelectSelector(
+                    SelectSelectorConfig(
+                        options=options,
+                        sort=True,
+                        mode=SelectSelectorMode.DROPDOWN,
+                    ),
+                ),
+                vol.Optional(CONF_NAME, default=self.hass.config.location_name): str,
+            }
+        )
+
         return self.async_show_form(
             step_id="user",
-            data_schema=vol.Schema(
-                {
-                    vol.Required(CONF_STATION_ID): int,
-                    vol.Optional(
-                        CONF_NAME, default=self.hass.config.location_name
-                    ): str,
-                }
-            ),
+            data_schema=schema,
             errors=errors,
         )

homeassistant/components/gios/strings.json

@@ -5,17 +5,17 @@
         "title": "GIO\u015a (Polish Chief Inspectorate Of Environmental Protection)",
         "data": {
           "name": "[%key:common::config_flow::data::name%]",
-          "station_id": "ID of the measuring station"
+          "station_id": "Measuring station"
         }
       }
     },
     "error": {
-      "wrong_station_id": "ID of the measuring station is not correct.",
       "invalid_sensors_data": "Invalid sensors' data for this measuring station.",
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]"
     },
     "abort": {
-      "already_configured": "[%key:common::config_flow::abort::already_configured_location%]"
+      "already_configured": "[%key:common::config_flow::abort::already_configured_location%]",
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]"
     }
   },
   "system_health": {

tests/components/gios/test_config_flow.py

@@ -6,7 +6,8 @@ from unittest.mock import patch
 from gios import ApiError
 
 from homeassistant.components.gios import config_flow
-from homeassistant.components.gios.const import CONF_STATION_ID
+from homeassistant.components.gios.const import CONF_STATION_ID, DOMAIN
+from homeassistant.config_entries import SOURCE_USER
 from homeassistant.const import CONF_NAME
 from homeassistant.core import HomeAssistant
 from homeassistant.data_entry_flow import FlowResultType
@@ -17,36 +18,35 @@ from tests.common import load_fixture
 
 CONFIG = {
     CONF_NAME: "Foo",
-    CONF_STATION_ID: 123,
+    CONF_STATION_ID: "123",
 }
 
 
 async def test_show_form(hass: HomeAssistant) -> None:
     """Test that the form is served with no input."""
-    flow = config_flow.GiosFlowHandler()
-    flow.hass = hass
-
-    result = await flow.async_step_user(user_input=None)
+    with patch(
+        "homeassistant.components.gios.coordinator.Gios._get_stations",
+        return_value=STATIONS,
+    ):
+        result = await hass.config_entries.flow.async_init(
+            DOMAIN, context={"source": SOURCE_USER}
+        )
 
     assert result["type"] is FlowResultType.FORM
     assert result["step_id"] == "user"
 
 
-async def test_invalid_station_id(hass: HomeAssistant) -> None:
-    """Test that errors are shown when measuring station ID is invalid."""
+async def test_form_with_api_error(hass: HomeAssistant) -> None:
+    """Test the form is aborted because of API error."""
     with patch(
         "homeassistant.components.gios.coordinator.Gios._get_stations",
-        return_value=STATIONS,
+        side_effect=ApiError("error"),
     ):
-        flow = config_flow.GiosFlowHandler()
-        flow.hass = hass
-        flow.context = {}
-
-        result = await flow.async_step_user(
-            user_input={CONF_NAME: "Foo", CONF_STATION_ID: 0}
+        result = await hass.config_entries.flow.async_init(
+            DOMAIN, context={"source": SOURCE_USER}
         )
 
-        assert result["errors"] == {CONF_STATION_ID: "wrong_station_id"}
+    assert result["type"] is FlowResultType.ABORT
 
 
 async def test_invalid_sensor_data(hass: HomeAssistant) -> None:
@@ -76,15 +76,23 @@ async def test_invalid_sensor_data(hass: HomeAssistant) -> None:
 
 async def test_cannot_connect(hass: HomeAssistant) -> None:
     """Test that errors are shown when cannot connect to GIOS server."""
-    with patch(
+    with (
+        patch(
+            "homeassistant.components.gios.coordinator.Gios._get_stations",
+            return_value=STATIONS,
+        ),
+        patch(
             "homeassistant.components.gios.coordinator.Gios._async_get",
             side_effect=ApiError("error"),
+        ),
     ):
-        flow = config_flow.GiosFlowHandler()
-        flow.hass = hass
-        flow.context = {}
-
-        result = await flow.async_step_user(user_input=CONFIG)
+        result = await hass.config_entries.flow.async_init(
+            DOMAIN, context={"source": SOURCE_USER}
+        )
+        result = await hass.config_entries.flow.async_configure(
+            result["flow_id"], CONFIG
+        )
+        await hass.async_block_till_done()
 
     assert result["errors"] == {"base": "cannot_connect"}