allow unpair without being connected

CHANGELOG.rst

@@ -13,6 +13,7 @@ and this project adheres to `Semantic Versioning <https://semver.org/spec/v2.0.0
 Changed
 -------
 * Relax ``async-timeout`` version to support different installations. Merged #1009.
+* ``unpair`` function of ``BleakClient`` in WinRT backend can be called without being connected to remove stored device information
 
 `0.17.0`_ (2022-09-12)
 ======================

bleak/backends/winrt/client.py

@@ -73,6 +73,22 @@
 #     protocol_error: typing.Optional[int]
 
 
+def _address_to_int(address: str) -> int:
+    """Converts the Bluetooth device address string to its representing integer
+
+    Args:
+        address (str): Bluetooth device address to convert
+
+    Returns:
+        int: integer representation of the given Bluetooth device address
+    """
+    _address_separators = [":", "-"]
+    for char in _address_separators:
+        address = address.replace(char, "")
+
+    return int(address, base=16)
+
+
 def _ensure_success(result: Any, attr: Optional[str], fail_msg: str) -> Any:
     """
     Ensures that *status* is ``GattCommunicationStatus.SUCCESS``, otherwise
@@ -453,26 +469,35 @@ async def unpair(self) -> bool:
 
         """
 
-        # New local device information object created since the object from the requester isn't updated
-        device_information = await DeviceInformation.create_from_id_async(
-            self._requester.device_information.id
-        )
-        if device_information.pairing.is_paired:
+        if self._requester:
+            device = self._requester
+            should_close = False
+        else:
+            device = await BluetoothLEDevice.from_bluetooth_address_async(
+                _address_to_int(self.address)
+            )
+            should_close = True
+
+        try:
+            # New local device information object created since the object from the requester isn't updated
+            device_information = await DeviceInformation.create_from_id_async(
+                device.device_information.id
+            )
             unpairing_result = await device_information.pairing.unpair_async()
 
-            if unpairing_result.status not in (
-                DeviceUnpairingResultStatus.UNPAIRED,
-                DeviceUnpairingResultStatus.ALREADY_UNPAIRED,
-            ):
-                raise BleakError(
-                    f"Could not unpair with device: {unpairing_result.status}"
-                )
+        finally:
+            if should_close:
+                # close the device object if this was created locally
+                device.close()
 
-            else:
-                logger.info("Unpaired with device.")
-                return True
+        if unpairing_result.status not in (
+            DeviceUnpairingResultStatus.UNPAIRED,
+            DeviceUnpairingResultStatus.ALREADY_UNPAIRED,
+        ):
+            raise BleakError(f"Could not unpair with device: {unpairing_result.status}")
 
-        return not device_information.pairing.is_paired
+        logger.info("Unpaired with device.")
+        return True
 
     # GATT services methods