Add config flow for Tuya (#35422)

* Added Tuya config flow

* Added test config_flow

* Fixed log error message

* Add test requirements

* Lint Fix

* Fix Black formatting

* Added pylint directive

Added pylint:disable=unused-import in config_flow.py

* Implementation requested changes

* Update CodeOwners

* Removed device registry cleanup

* Force checks

* Force checks

* Fix implemetation

- Set config schema "deprecated"
- Removed async from update_callback

* Updating test

* Fix formatting

* Config Flow test fix

- mock out async_setup and async_setup_entry

* Fix formatting

homeassistant/components/tuya/config_flow.py

@@ -0,0 +1,108 @@
+"""Config flow for Tuya."""
+import logging
+
+from tuyaha import TuyaApi
+from tuyaha.tuyaapi import TuyaAPIException, TuyaNetException, TuyaServerException
+import voluptuous as vol
+
+from homeassistant import config_entries
+from homeassistant.const import CONF_PASSWORD, CONF_PLATFORM, CONF_USERNAME
+
+# pylint:disable=unused-import
+from .const import CONF_COUNTRYCODE, DOMAIN, TUYA_PLATFORMS
+
+_LOGGER = logging.getLogger(__name__)
+
+DATA_SCHEMA_USER = vol.Schema(
+    {
+        vol.Required(CONF_USERNAME): str,
+        vol.Required(CONF_PASSWORD): str,
+        vol.Required(CONF_COUNTRYCODE): vol.Coerce(int),
+        vol.Required(CONF_PLATFORM): vol.In(TUYA_PLATFORMS),
+    }
+)
+
+RESULT_AUTH_FAILED = "auth_failed"
+RESULT_CONN_ERROR = "conn_error"
+RESULT_SUCCESS = "success"
+
+RESULT_LOG_MESSAGE = {
+    RESULT_AUTH_FAILED: "Invalid credential",
+    RESULT_CONN_ERROR: "Connection error",
+}
+
+
+class TuyaConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
+    """Handle a tuya config flow."""
+
+    VERSION = 1
+    CONNECTION_CLASS = config_entries.CONN_CLASS_CLOUD_POLL
+
+    def __init__(self):
+        """Initialize flow."""
+        self._country_code = None
+        self._password = None
+        self._platform = None
+        self._username = None
+        self._is_import = False
+
+    def _get_entry(self):
+        return self.async_create_entry(
+            title=self._username,
+            data={
+                CONF_COUNTRYCODE: self._country_code,
+                CONF_PASSWORD: self._password,
+                CONF_PLATFORM: self._platform,
+                CONF_USERNAME: self._username,
+            },
+        )
+
+    def _try_connect(self):
+        """Try to connect and check auth."""
+        tuya = TuyaApi()
+        try:
+            tuya.init(
+                self._username, self._password, self._country_code, self._platform
+            )
+        except (TuyaNetException, TuyaServerException):
+            return RESULT_CONN_ERROR
+        except TuyaAPIException:
+            return RESULT_AUTH_FAILED
+
+        return RESULT_SUCCESS
+
+    async def async_step_import(self, user_input=None):
+        """Handle configuration by yaml file."""
+        self._is_import = True
+        return await self.async_step_user(user_input)
+
+    async def async_step_user(self, user_input=None):
+        """Handle a flow initialized by the user."""
+        if self._async_current_entries():
+            return self.async_abort(reason="single_instance_allowed")
+
+        errors = {}
+
+        if user_input is not None:
+
+            self._country_code = str(user_input[CONF_COUNTRYCODE])
+            self._password = user_input[CONF_PASSWORD]
+            self._platform = user_input[CONF_PLATFORM]
+            self._username = user_input[CONF_USERNAME]
+
+            result = await self.hass.async_add_executor_job(self._try_connect)
+
+            if result == RESULT_SUCCESS:
+                return self._get_entry()
+            if result != RESULT_AUTH_FAILED or self._is_import:
+                if self._is_import:
+                    _LOGGER.error(
+                        "Error importing from configuration.yaml: %s",
+                        RESULT_LOG_MESSAGE.get(result, "Generic Error"),
+                    )
+                return self.async_abort(reason=result)
+            errors["base"] = result
+
+        return self.async_show_form(
+            step_id="user", data_schema=DATA_SCHEMA_USER, errors=errors
+        )