Add Ondilo ico integration (#44728)

* First implementationof Ondilo component support

* Update manifest toadd pypi pkg dependency

* Update entities name and corrected refresh issue

* Changed percentage unit name

* Corrected merge issues

* Updated coveragerc

* cleaned up code and corrected config flow tests

* Code cleanup and added test for exisitng entry

* Changes following PR comments:
- Inherit CoordinatorEntity instead of Entity
- Merged pools blocking calls into one
- Renamed devices vars to sensors
- Check supported sensor types
- Stop relying on array index position for pools
- Stop relying on attribute position in dict for sensors

* Corrected unit test

* Reformat sensor type check

homeassistant/components/ondilo_ico/config_flow.py

@@ -0,0 +1,43 @@
+"""Config flow for Ondilo ICO."""
+import logging
+
+from homeassistant import config_entries
+from homeassistant.helpers import config_entry_oauth2_flow
+
+from .const import DOMAIN
+from .oauth_impl import OndiloOauth2Implementation
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class OAuth2FlowHandler(
+    config_entry_oauth2_flow.AbstractOAuth2FlowHandler, domain=DOMAIN
+):
+    """Config flow to handle Ondilo ICO OAuth2 authentication."""
+
+    DOMAIN = DOMAIN
+    CONNECTION_CLASS = config_entries.CONN_CLASS_CLOUD_POLL
+
+    async def async_step_user(self, user_input=None):
+        """Handle a flow initialized by the user."""
+        await self.async_set_unique_id(DOMAIN)
+
+        if self._async_current_entries():
+            return self.async_abort(reason="single_instance_allowed")
+
+        self.async_register_implementation(
+            self.hass,
+            OndiloOauth2Implementation(self.hass),
+        )
+
+        return await super().async_step_user(user_input)
+
+    @property
+    def logger(self) -> logging.Logger:
+        """Return logger."""
+        return logging.getLogger(__name__)
+
+    @property
+    def extra_authorize_data(self) -> dict:
+        """Extra data that needs to be appended to the authorize url."""
+        return {"scope": "api"}