Add zeroconf discovery for bond integration (#38448)

* Add zeroconf discovery for bond integration

* Add zeroconf discovery for bond integration (fix typo)

* Add zeroconf discovery for bond integration (PR feedback)

* Add zeroconf discovery for bond integration (PR feedback)

* Add zeroconf discovery for bond integration (PR feedback)

homeassistant/components/bond/config_flow.py

@@ -1,23 +1,26 @@
 """Config flow for Bond integration."""
 import logging
+from typing import Any, Dict, Optional
 
 from aiohttp import ClientConnectionError, ClientResponseError
 from bond_api import Bond
 import voluptuous as vol
 
 from homeassistant import config_entries, exceptions
-from homeassistant.const import CONF_ACCESS_TOKEN, CONF_HOST
+from homeassistant.const import CONF_ACCESS_TOKEN, CONF_HOST, CONF_NAME
 
+from .const import CONF_BOND_ID
 from .const import DOMAIN  # pylint:disable=unused-import
 
 _LOGGER = logging.getLogger(__name__)
 
-DATA_SCHEMA = vol.Schema(
+DATA_SCHEMA_USER = vol.Schema(
     {vol.Required(CONF_HOST): str, vol.Required(CONF_ACCESS_TOKEN): str}
 )
+DATA_SCHEMA_DISCOVERY = vol.Schema({vol.Required(CONF_ACCESS_TOKEN): str})
 
 
-async def validate_input(data) -> str:
+async def _validate_input(data: Dict[str, Any]) -> str:
     """Validate the user input allows us to connect."""
 
     try:
@@ -26,11 +29,14 @@ async def validate_input(data) -> str:
         # call to non-version API is needed to validate authentication
         await bond.devices()
     except ClientConnectionError:
-        raise CannotConnect
+        raise InputValidationError("cannot_connect")
     except ClientResponseError as error:
         if error.status == 401:
-            raise InvalidAuth
+            raise InputValidationError("invalid_auth")
-        raise
+        raise InputValidationError("unknown")
+    except Exception:
+        _LOGGER.exception("Unexpected exception")
+        raise InputValidationError("unknown")
 
     # Return unique ID from the hub to be stored in the config entry.
     return version["bondid"]
@@ -42,32 +48,73 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
     VERSION = 1
     CONNECTION_CLASS = config_entries.CONN_CLASS_LOCAL_POLL
 
-    async def async_step_user(self, user_input=None):
+    _discovered: dict = None
-        """Handle the initial step."""
+
+    async def async_step_zeroconf(
+        self, discovery_info: Optional[Dict[str, Any]] = None
+    ) -> Dict[str, Any]:
+        """Handle a flow initialized by zeroconf discovery."""
+        name: str = discovery_info[CONF_NAME]
+        host: str = discovery_info[CONF_HOST]
+        bond_id = name.partition(".")[0]
+        await self.async_set_unique_id(bond_id)
+        self._abort_if_unique_id_configured({CONF_HOST: host})
+
+        self._discovered = {
+            CONF_HOST: host,
+            CONF_BOND_ID: bond_id,
+        }
+        # pylint: disable=no-member # https://github.com/PyCQA/pylint/issues/3167
+        self.context.update({"title_placeholders": self._discovered})
+
+        return await self.async_step_confirm()
+
+    async def async_step_confirm(
+        self, user_input: Dict[str, Any] = None
+    ) -> Dict[str, Any]:
+        """Handle confirmation flow for discovered bond hub."""
+        errors = {}
+        if user_input is not None:
+            data = user_input.copy()
+            data[CONF_HOST] = self._discovered[CONF_HOST]
+            try:
+                return await self._try_create_entry(data)
+            except InputValidationError as error:
+                errors["base"] = error.base
+
+        return self.async_show_form(
+            step_id="confirm",
+            data_schema=DATA_SCHEMA_DISCOVERY,
+            errors=errors,
+            description_placeholders=self._discovered,
+        )
+
+    async def async_step_user(
+        self, user_input: Dict[str, Any] = None
+    ) -> Dict[str, Any]:
+        """Handle a flow initialized by the user."""
         errors = {}
         if user_input is not None:
             try:
-                bond_id = await validate_input(user_input)
+                return await self._try_create_entry(user_input)
-            except CannotConnect:
+            except InputValidationError as error:
-                errors["base"] = "cannot_connect"
+                errors["base"] = error.base
-            except InvalidAuth:
-                errors["base"] = "invalid_auth"
-            except Exception:  # pylint: disable=broad-except
-                _LOGGER.exception("Unexpected exception")
-                errors["base"] = "unknown"
-            else:
-                await self.async_set_unique_id(bond_id)
-                self._abort_if_unique_id_configured()
-                return self.async_create_entry(title=bond_id, data=user_input)
 
         return self.async_show_form(
-            step_id="user", data_schema=DATA_SCHEMA, errors=errors
+            step_id="user", data_schema=DATA_SCHEMA_USER, errors=errors
         )
 
-
+    async def _try_create_entry(self, data: Dict[str, Any]) -> Dict[str, Any]:
-class CannotConnect(exceptions.HomeAssistantError):
+        bond_id = await _validate_input(data)
-    """Error to indicate we cannot connect."""
+        await self.async_set_unique_id(bond_id)
+        self._abort_if_unique_id_configured()
+        return self.async_create_entry(title=bond_id, data=data)
 
 
-class InvalidAuth(exceptions.HomeAssistantError):
+class InputValidationError(exceptions.HomeAssistantError):
-    """Error to indicate there is invalid auth."""
+    """Error to indicate we cannot proceed due to invalid input."""
+
+    def __init__(self, base: str):
+        """Initialize with error base."""
+        super().__init__()
+        self.base = base

homeassistant/components/bond/const.py

@@ -1,3 +1,5 @@
 """Constants for the Bond integration."""
 
 DOMAIN = "bond"
+
+CONF_BOND_ID: str = "bond_id"

homeassistant/components/bond/manifest.json

@@ -4,6 +4,7 @@
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/bond",
   "requirements": ["bond-api==0.1.8"],
+  "zeroconf": ["_bond._tcp.local."],
   "codeowners": ["@prystupa"],
   "quality_scale": "platinum"
 }

homeassistant/components/bond/strings.json

@@ -1,6 +1,13 @@
 {
   "config": {
+    "flow_title": "Bond: {bond_id} ({host})",
     "step": {
+      "confirm": {
+        "description": "Do you want to set up {bond_id}?",
+        "data": {
+          "access_token": "[%key:common::config_flow::data::access_token%]"
+        }
+      },
       "user": {
         "data": {
           "host": "[%key:common::config_flow::data::host%]",

homeassistant/components/bond/translations/en.json

@@ -8,7 +8,14 @@
             "invalid_auth": "Invalid authentication",
             "unknown": "Unexpected error"
         },
+        "flow_title": "Bond: {bond_id} ({host})",
         "step": {
+            "confirm": {
+                "data": {
+                    "access_token": "Access Token"
+                },
+                "description": "Do you want to set up {bond_id}?"
+            },
             "user": {
                 "data": {
                     "access_token": "Access Token",

homeassistant/generated/zeroconf.py

@@ -16,6 +16,9 @@ ZEROCONF = {
         "axis",
         "doorbird"
     ],
+    "_bond._tcp.local.": [
+        "bond"
+    ],
     "_daap._tcp.local.": [
         "forked_daapd"
     ],

tests/components/bond/test_config_flow.py

@@ -1,4 +1,5 @@
 """Test the Bond config flow."""
+from typing import Any, Dict
 
 from aiohttp import ClientConnectionError, ClientResponseError
 
@@ -12,8 +13,8 @@ from tests.async_mock import Mock, patch
 from tests.common import MockConfigEntry
 
 
-async def test_form(hass: core.HomeAssistant):
+async def test_user_form(hass: core.HomeAssistant):
-    """Test we get the form."""
+    """Test we get the user initiated form."""
     await setup.async_setup_component(hass, "persistent_notification", {})
     result = await hass.config_entries.flow.async_init(
         DOMAIN, context={"source": config_entries.SOURCE_USER}
@@ -23,11 +24,7 @@ async def test_form(hass: core.HomeAssistant):
 
     with patch_bond_version(
         return_value={"bondid": "test-bond-id"}
-    ), patch_bond_device_ids(), patch(
+    ), patch_bond_device_ids(), _patch_async_setup() as mock_setup, _patch_async_setup_entry() as mock_setup_entry:
-        "homeassistant.components.bond.async_setup", return_value=True
-    ) as mock_setup, patch(
-        "homeassistant.components.bond.async_setup_entry", return_value=True,
-    ) as mock_setup_entry:
         result2 = await hass.config_entries.flow.async_configure(
             result["flow_id"],
             {CONF_HOST: "some host", CONF_ACCESS_TOKEN: "test-token"},
@@ -44,7 +41,7 @@ async def test_form(hass: core.HomeAssistant):
     assert len(mock_setup_entry.mock_calls) == 1
 
 
-async def test_form_invalid_auth(hass: core.HomeAssistant):
+async def test_user_form_invalid_auth(hass: core.HomeAssistant):
     """Test we handle invalid auth."""
     result = await hass.config_entries.flow.async_init(
         DOMAIN, context={"source": config_entries.SOURCE_USER}
@@ -64,7 +61,7 @@ async def test_form_invalid_auth(hass: core.HomeAssistant):
     assert result2["errors"] == {"base": "invalid_auth"}
 
 
-async def test_form_cannot_connect(hass: core.HomeAssistant):
+async def test_user_form_cannot_connect(hass: core.HomeAssistant):
     """Test we handle cannot connect error."""
     result = await hass.config_entries.flow.async_init(
         DOMAIN, context={"source": config_entries.SOURCE_USER}
@@ -82,27 +79,27 @@ async def test_form_cannot_connect(hass: core.HomeAssistant):
     assert result2["errors"] == {"base": "cannot_connect"}
 
 
-async def test_form_unexpected_error(hass: core.HomeAssistant):
+async def test_user_form_unexpected_client_error(hass: core.HomeAssistant):
+    """Test we handle unexpected client error gracefully."""
+    await _help_test_form_unexpected_error(
+        hass,
+        source=config_entries.SOURCE_USER,
+        user_input={CONF_HOST: "some host", CONF_ACCESS_TOKEN: "test-token"},
+        error=ClientResponseError(Mock(), Mock(), status=500),
+    )
+
+
+async def test_user_form_unexpected_error(hass: core.HomeAssistant):
     """Test we handle unexpected error gracefully."""
-    result = await hass.config_entries.flow.async_init(
+    await _help_test_form_unexpected_error(
-        DOMAIN, context={"source": config_entries.SOURCE_USER}
+        hass,
+        source=config_entries.SOURCE_USER,
+        user_input={CONF_HOST: "some host", CONF_ACCESS_TOKEN: "test-token"},
+        error=Exception(),
     )
 
-    with patch_bond_version(
-        return_value={"bond_id": "test-bond-id"}
-    ), patch_bond_device_ids(
-        side_effect=ClientResponseError(Mock(), Mock(), status=500)
-    ):
-        result2 = await hass.config_entries.flow.async_configure(
-            result["flow_id"],
-            {CONF_HOST: "some host", CONF_ACCESS_TOKEN: "test-token"},
-        )
 
-    assert result2["type"] == "form"
+async def test_user_form_one_entry_per_device_allowed(hass: core.HomeAssistant):
-    assert result2["errors"] == {"base": "unknown"}
-
-
-async def test_form_one_entry_per_device_allowed(hass: core.HomeAssistant):
     """Test that only one entry allowed per unique ID reported by Bond hub device."""
     MockConfigEntry(
         domain=DOMAIN,
@@ -118,11 +115,7 @@ async def test_form_one_entry_per_device_allowed(hass: core.HomeAssistant):
 
     with patch_bond_version(
         return_value={"bondid": "already-registered-bond-id"}
-    ), patch_bond_device_ids(), patch(
+    ), patch_bond_device_ids(), _patch_async_setup() as mock_setup, _patch_async_setup_entry() as mock_setup_entry:
-        "homeassistant.components.bond.async_setup", return_value=True
-    ) as mock_setup, patch(
-        "homeassistant.components.bond.async_setup_entry", return_value=True,
-    ) as mock_setup_entry:
         result2 = await hass.config_entries.flow.async_configure(
             result["flow_id"],
             {CONF_HOST: "some host", CONF_ACCESS_TOKEN: "test-token"},
@@ -134,3 +127,108 @@ async def test_form_one_entry_per_device_allowed(hass: core.HomeAssistant):
     await hass.async_block_till_done()
     assert len(mock_setup.mock_calls) == 0
     assert len(mock_setup_entry.mock_calls) == 0
+
+
+async def test_zeroconf_form(hass: core.HomeAssistant):
+    """Test we get the discovery form."""
+    await setup.async_setup_component(hass, "persistent_notification", {})
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN,
+        context={"source": config_entries.SOURCE_ZEROCONF},
+        data={"name": "test-bond-id.some-other-tail-info", "host": "test-host"},
+    )
+    assert result["type"] == "form"
+    assert result["errors"] == {}
+
+    with patch_bond_version(
+        return_value={"bondid": "test-bond-id"}
+    ), patch_bond_device_ids(), _patch_async_setup() as mock_setup, _patch_async_setup_entry() as mock_setup_entry:
+        result2 = await hass.config_entries.flow.async_configure(
+            result["flow_id"], {CONF_ACCESS_TOKEN: "test-token"},
+        )
+
+    assert result2["type"] == "create_entry"
+    assert result2["title"] == "test-bond-id"
+    assert result2["data"] == {
+        CONF_HOST: "test-host",
+        CONF_ACCESS_TOKEN: "test-token",
+    }
+    await hass.async_block_till_done()
+    assert len(mock_setup.mock_calls) == 1
+    assert len(mock_setup_entry.mock_calls) == 1
+
+
+async def test_zeroconf_already_configured(hass: core.HomeAssistant):
+    """Test starting a flow from discovery when already configured."""
+    await setup.async_setup_component(hass, "persistent_notification", {})
+
+    entry = MockConfigEntry(
+        domain=DOMAIN,
+        unique_id="already-registered-bond-id",
+        data={CONF_HOST: "stored-host", CONF_ACCESS_TOKEN: "test-token"},
+    )
+    entry.add_to_hass(hass)
+
+    with _patch_async_setup() as mock_setup, _patch_async_setup_entry() as mock_setup_entry:
+        result = await hass.config_entries.flow.async_init(
+            DOMAIN,
+            context={"source": config_entries.SOURCE_ZEROCONF},
+            data={
+                "name": "already-registered-bond-id.some-other-tail-info",
+                "host": "updated-host",
+            },
+        )
+
+    assert result["type"] == "abort"
+    assert result["reason"] == "already_configured"
+    assert entry.data["host"] == "updated-host"
+
+    await hass.async_block_till_done()
+    assert len(mock_setup.mock_calls) == 0
+    assert len(mock_setup_entry.mock_calls) == 0
+
+
+async def test_zeroconf_form_unexpected_error(hass: core.HomeAssistant):
+    """Test we handle unexpected error gracefully."""
+    await _help_test_form_unexpected_error(
+        hass,
+        source=config_entries.SOURCE_ZEROCONF,
+        initial_input={
+            "name": "test-bond-id.some-other-tail-info",
+            "host": "test-host",
+        },
+        user_input={CONF_ACCESS_TOKEN: "test-token"},
+        error=Exception(),
+    )
+
+
+async def _help_test_form_unexpected_error(
+    hass: core.HomeAssistant,
+    *,
+    source: str,
+    initial_input: Dict[str, Any] = None,
+    user_input: Dict[str, Any],
+    error: Exception,
+):
+    """Test we handle unexpected error gracefully."""
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": source}, data=initial_input
+    )
+
+    with patch_bond_version(
+        return_value={"bond_id": "test-bond-id"}
+    ), patch_bond_device_ids(side_effect=error):
+        result2 = await hass.config_entries.flow.async_configure(
+            result["flow_id"], user_input
+        )
+
+    assert result2["type"] == "form"
+    assert result2["errors"] == {"base": "unknown"}
+
+
+def _patch_async_setup():
+    return patch("homeassistant.components.bond.async_setup", return_value=True)
+
+
+def _patch_async_setup_entry():
+    return patch("homeassistant.components.bond.async_setup_entry", return_value=True,)