Only allow unique location names in google air quality (#159285)

homeassistant/components/google_air_quality/config_flow.py

@@ -101,6 +101,15 @@ def _is_location_already_configured(
     return False
 
 
+def _is_location_name_already_configured(hass: HomeAssistant, new_data: str) -> bool:
+    """Check if the location name is already configured."""
+    for entry in hass.config_entries.async_entries(DOMAIN):
+        for subentry in entry.subentries.values():
+            if subentry.title.lower() == new_data.lower():
+                return True
+    return False
+
+
 class GoogleAirQualityConfigFlow(ConfigFlow, domain=DOMAIN):
     """Handle a config flow for Google AirQuality."""
 
@@ -178,8 +187,19 @@ class LocationSubentryFlowHandler(ConfigSubentryFlow):
         description_placeholders: dict[str, str] = {}
         if user_input is not None:
             if _is_location_already_configured(self.hass, user_input[CONF_LOCATION]):
-                return self.async_abort(reason="already_configured")
+                errors["base"] = "location_already_configured"
+            if _is_location_name_already_configured(self.hass, user_input[CONF_NAME]):
+                errors["base"] = "location_name_already_configured"
             api: GoogleAirQualityApi = self._get_entry().runtime_data.api
+            if errors:
+                return self.async_show_form(
+                    step_id="location",
+                    data_schema=self.add_suggested_values_to_schema(
+                        _get_location_schema(self.hass), user_input
+                    ),
+                    errors=errors,
+                    description_placeholders=description_placeholders,
+                )
             if await _validate_input(user_input, api, errors, description_placeholders):
                 return self.async_create_entry(
                     title=user_input[CONF_NAME],

homeassistant/components/google_air_quality/strings.json

@@ -47,12 +47,12 @@
   "config_subentries": {
     "location": {
       "abort": {
-        "already_configured": "[%key:common::config_flow::abort::already_configured_location%]",
         "unable_to_fetch": "[%key:component::google_air_quality::common::unable_to_fetch%]"
       },
       "entry_type": "Air quality location",
       "error": {
-        "no_data_for_location": "Information is unavailable for this location. Please try a different location.",
+        "location_already_configured": "[%key:common::config_flow::abort::already_configured_location%]",
+        "location_name_already_configured": "Location name already configured.",
         "unknown": "[%key:common::config_flow::error::unknown%]"
       },
       "initiate_flow": {

tests/components/google_air_quality/test_config_flow.py

@@ -349,8 +349,43 @@ async def test_subentry_flow_location_already_configured(
         },
     )
 
-    assert result["type"] is FlowResultType.ABORT
-    assert result["reason"] == "already_configured"
+    assert result["type"] is FlowResultType.FORM
+    assert result["errors"]["base"] == "location_already_configured"
+
+    entry = hass.config_entries.async_get_entry(mock_config_entry.entry_id)
+    assert len(entry.subentries) == 1
+
+
+async def test_subentry_flow_location_name_already_configured(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_api: AsyncMock,
+) -> None:
+    """Test user input for a location name that already exists."""
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+
+    result = await hass.config_entries.subentries.async_init(
+        (mock_config_entry.entry_id, "location"),
+        context={"source": "user"},
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "location"
+
+    result = await hass.config_entries.subentries.async_configure(
+        result["flow_id"],
+        {
+            CONF_NAME: "Home",
+            CONF_LOCATION: {
+                CONF_LATITUDE: 30.1,
+                CONF_LONGITUDE: 40.1,
+            },
+        },
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["errors"]["base"] == "location_name_already_configured"
 
     entry = hass.config_entries.async_get_entry(mock_config_entry.entry_id)
     assert len(entry.subentries) == 1