Airtouch4 integration (#43513)

* airtouch 4 climate control integration

* enhance tests for airtouch. Fix linting issues

* Fix tests

* rework tests

* fix latest qa issues

* Clean up

* add already_configured message

* Use common string

* further qa fixes

* simplify airtouch4 domain storage

Co-authored-by: Franck Nijhof <git@frenck.dev>
Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

homeassistant/components/airtouch4/config_flow.py

@@ -0,0 +1,50 @@
+"""Config flow for AirTouch4."""
+from airtouch4pyapi import AirTouch, AirTouchStatus
+import voluptuous as vol
+
+from homeassistant import config_entries
+from homeassistant.const import CONF_HOST
+
+from .const import DOMAIN
+
+DATA_SCHEMA = vol.Schema({vol.Required(CONF_HOST): str})
+
+
+class AirtouchConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
+    """Handle an Airtouch config flow."""
+
+    VERSION = 1
+
+    async def async_step_user(self, user_input=None):
+        """Handle a flow initialized by the user."""
+        if user_input is None:
+            return self.async_show_form(step_id="user", data_schema=DATA_SCHEMA)
+
+        errors = {}
+
+        host = user_input[CONF_HOST]
+        self._async_abort_entries_match({CONF_HOST: host})
+
+        airtouch = AirTouch(host)
+        await airtouch.UpdateInfo()
+        airtouch_status = airtouch.Status
+        airtouch_has_groups = bool(
+            airtouch.Status == AirTouchStatus.OK and airtouch.GetGroups()
+        )
+
+        if airtouch_status != AirTouchStatus.OK:
+            errors["base"] = "cannot_connect"
+        elif not airtouch_has_groups:
+            errors["base"] = "no_units"
+
+        if errors:
+            return self.async_show_form(
+                step_id="user", data_schema=DATA_SCHEMA, errors=errors
+            )
+
+        return self.async_create_entry(
+            title=user_input[CONF_HOST],
+            data={
+                CONF_HOST: user_input[CONF_HOST],
+            },
+        )