Add bluetooth options flow to pick the adapter (#75701)

homeassistant/components/bluetooth/util.py

@@ -0,0 +1,27 @@
+"""The bluetooth integration utilities."""
+from __future__ import annotations
+
+import platform
+
+from .const import MACOS_DEFAULT_BLUETOOTH_ADAPTER, UNIX_DEFAULT_BLUETOOTH_ADAPTER
+
+
+async def async_get_bluetooth_adapters() -> list[str]:
+    """Return a list of bluetooth adapters."""
+    if platform.system() == "Windows":  # We don't have a good way to detect on windows
+        return []
+    if platform.system() == "Darwin":  # CoreBluetooth is built in on MacOS hardware
+        return [MACOS_DEFAULT_BLUETOOTH_ADAPTER]
+    from bluetooth_adapters import (  # pylint: disable=import-outside-toplevel
+        get_bluetooth_adapters,
+    )
+
+    adapters = await get_bluetooth_adapters()
+    if (
+        UNIX_DEFAULT_BLUETOOTH_ADAPTER in adapters
+        and adapters[0] != UNIX_DEFAULT_BLUETOOTH_ADAPTER
+    ):
+        # The default adapter always needs to be the first in the list
+        # because that is how bleak works.
+        adapters.insert(0, adapters.pop(adapters.index(UNIX_DEFAULT_BLUETOOTH_ADAPTER)))
+    return adapters