Add Homepluscontrol integration (#46783)

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

homeassistant/components/home_plus_control/helpers.py

@@ -0,0 +1,53 @@
+"""Helper classes and functions for the Legrand Home+ Control integration."""
+from homeassistant.const import CONF_CLIENT_ID, CONF_CLIENT_SECRET
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import config_entry_oauth2_flow
+
+from .const import CONF_SUBSCRIPTION_KEY, DOMAIN, OAUTH2_AUTHORIZE, OAUTH2_TOKEN
+
+
+class HomePlusControlOAuth2Implementation(
+    config_entry_oauth2_flow.LocalOAuth2Implementation
+):
+    """OAuth2 implementation that extends the HomeAssistant local implementation.
+
+    It provides the name of the integration and adds support for the subscription key.
+
+    Attributes:
+        hass (HomeAssistant): HomeAssistant core object.
+        client_id (str): Client identifier assigned by the API provider when registering an app.
+        client_secret (str): Client secret assigned by the API provider when registering an app.
+        subscription_key (str): Subscription key obtained from the API provider.
+        authorize_url (str): Authorization URL initiate authentication flow.
+        token_url (str): URL to retrieve access/refresh tokens.
+        name (str): Name of the implementation (appears in the HomeAssitant GUI).
+    """
+
+    def __init__(
+        self,
+        hass: HomeAssistant,
+        config_data: dict,
+    ):
+        """HomePlusControlOAuth2Implementation Constructor.
+
+            Initialize the authentication implementation for the Legrand Home+ Control API.
+
+        Args:
+            hass (HomeAssistant): HomeAssistant core object.
+            config_data (dict): Configuration data that complies with the config Schema
+                                of this component.
+        """
+        super().__init__(
+            hass=hass,
+            domain=DOMAIN,
+            client_id=config_data[CONF_CLIENT_ID],
+            client_secret=config_data[CONF_CLIENT_SECRET],
+            authorize_url=OAUTH2_AUTHORIZE,
+            token_url=OAUTH2_TOKEN,
+        )
+        self.subscription_key = config_data[CONF_SUBSCRIPTION_KEY]
+
+    @property
+    def name(self) -> str:
+        """Name of the implementation."""
+        return "Home+ Control"