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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.bluetooth.bluez.internal;
  14
  15 import java.util.Set;
  16 import java.util.concurrent.Future;
  17 import java.util.concurrent.TimeUnit;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  22 import org.openhab.core.config.discovery.DiscoveryResult;
  23 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  24 import org.openhab.core.config.discovery.DiscoveryService;
  25 import org.openhab.core.thing.ThingUID;
  26 import org.osgi.service.component.annotations.Activate;
  27 import org.osgi.service.component.annotations.Component;
  28 import org.osgi.service.component.annotations.Reference;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 import com.github.hypfvieh.bluetooth.wrapper.BluetoothAdapter;
  33
  34 /**
  35  * This is a discovery service, which checks whether we are running on a Linux with a BlueZ stack.
  36  * If this is the case, we create a bridge handler that provides Bluetooth access through BlueZ.
  37  *
  38  * @author Kai Kreuzer - Initial Contribution and API
  39  * @author Hilbrand Bouwkamp - Moved background scan to actual background method
  40  * @author Connor Petty - Replaced tinyB with bluezDbus
  41  *
  42  */
  43 @NonNullByDefault
  44 @Component(service = DiscoveryService.class, configurationPid = "discovery.bluetooth.bluez")
  45 public class BlueZDiscoveryService extends AbstractDiscoveryService {
  46
  47     private final Logger logger = LoggerFactory.getLogger(BlueZDiscoveryService.class);
  48
  49     private final DeviceManagerFactory deviceManagerFactory;
  50     private @Nullable Future<?> backgroundScan;
  51
  52     @Activate
  53     public BlueZDiscoveryService(@Reference DeviceManagerFactory deviceManagerFactory) {
  54         super(Set.of(BlueZAdapterConstants.THING_TYPE_BLUEZ), 1, true);
  55         this.deviceManagerFactory = deviceManagerFactory;
  56     }
  57
  58     private static void cancel(@Nullable Future<?> future) {
  59         if (future != null) {
  60             future.cancel(false);
  61         }
  62     }
  63
  64     @Override
  65     protected void startBackgroundDiscovery() {
  66         backgroundScan = scheduler.scheduleWithFixedDelay(() -> {
  67             DeviceManagerWrapper deviceManager = deviceManagerFactory.getDeviceManager();
  68             if (deviceManager == null) {
  69                 return;
  70             }
  71             startScan();
  72         }, 5, 10, TimeUnit.SECONDS);
  73     }
  74
  75     @Override
  76     protected void stopBackgroundDiscovery() {
  77         cancel(backgroundScan);
  78         backgroundScan = null;
  79     }
  80
  81     @Override
  82     protected void startScan() {
  83         DeviceManagerWrapper deviceManager = deviceManagerFactory.getDeviceManager();
  84         if (deviceManager == null) {
  85             logger.warn("The DeviceManager is not available");
  86             return;
  87         }
  88         // the first time the device manager is not null we can cancel background discovery
  89         stopBackgroundDiscovery();
  90         deviceManager.scanForBluetoothAdapters().stream()//
  91                 .map(this::createDiscoveryResult)//
  92                 .forEach(this::thingDiscovered);
  93     }
  94
  95     private DiscoveryResult createDiscoveryResult(BluetoothAdapter adapter) {
  96         return DiscoveryResultBuilder.create(new ThingUID(BlueZAdapterConstants.THING_TYPE_BLUEZ, getId(adapter)))
  97                 .withLabel("Bluetooth Interface " + adapter.getName())
  98                 .withProperty(BlueZAdapterConstants.PROPERTY_ADDRESS, adapter.getAddress())
  99                 .withRepresentationProperty(BlueZAdapterConstants.PROPERTY_ADDRESS).build();
 100     }
 101
 102     private String getId(BluetoothAdapter adapter) {
 103         return adapter.getDeviceName().replaceAll("[^a-zA-Z0-9_]", "");
 104     }
 105 }