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   1 /**
   2  * Copyright (c) 2010-2022 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.airquality.internal.discovery;
  14
  15 import static org.openhab.binding.airquality.internal.AirQualityBindingConstants.*;
  16 import static org.openhab.binding.airquality.internal.config.AirQualityConfiguration.LOCATION;
  17
  18 import java.util.Collections;
  19 import java.util.Set;
  20
  21 import org.eclipse.jdt.annotation.NonNullByDefault;
  22 import org.eclipse.jdt.annotation.Nullable;
  23 import org.openhab.binding.airquality.internal.handler.AirQualityBridgeHandler;
  24 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  25 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  26 import org.openhab.core.config.discovery.DiscoveryService;
  27 import org.openhab.core.i18n.LocationProvider;
  28 import org.openhab.core.library.types.PointType;
  29 import org.openhab.core.thing.ThingTypeUID;
  30 import org.openhab.core.thing.ThingUID;
  31 import org.openhab.core.thing.binding.ThingHandler;
  32 import org.openhab.core.thing.binding.ThingHandlerService;
  33 import org.osgi.service.component.annotations.Component;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 /**
  38  * The {@link AirQualityDiscoveryService} creates things based on the configured location.
  39  *
  40  * @author Gaël L'hopital - Initial Contribution
  41  */
  42 @Component(service = DiscoveryService.class, configurationPid = "discovery.airquality")
  43 @NonNullByDefault
  44 public class AirQualityDiscoveryService extends AbstractDiscoveryService implements ThingHandlerService {
  45     private static final int DISCOVER_TIMEOUT_SECONDS = 2;
  46     private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Collections.singleton(THING_TYPE_STATION);
  47
  48     private final Logger logger = LoggerFactory.getLogger(AirQualityDiscoveryService.class);
  49
  50     private @Nullable LocationProvider locationProvider;
  51     private @Nullable AirQualityBridgeHandler bridgeHandler;
  52
  53     /**
  54      * Creates an AirQualityDiscoveryService with enabled autostart.
  55      */
  56     public AirQualityDiscoveryService() {
  57         super(SUPPORTED_THING_TYPES_UIDS, DISCOVER_TIMEOUT_SECONDS, false);
  58     }
  59
  60     @Override
  61     public void setThingHandler(@Nullable ThingHandler handler) {
  62         if (handler instanceof AirQualityBridgeHandler) {
  63             final AirQualityBridgeHandler bridgeHandler = (AirQualityBridgeHandler) handler;
  64             this.bridgeHandler = bridgeHandler;
  65             this.locationProvider = bridgeHandler.getLocationProvider();
  66         }
  67     }
  68
  69     @Override
  70     public @Nullable ThingHandler getThingHandler() {
  71         return bridgeHandler;
  72     }
  73
  74     @Override
  75     public void deactivate() {
  76         super.deactivate();
  77     }
  78
  79     @Override
  80     protected void startScan() {
  81         logger.debug("Starting Air Quality discovery scan");
  82         LocationProvider provider = locationProvider;
  83         if (provider != null) {
  84             PointType location = provider.getLocation();
  85             AirQualityBridgeHandler bridge = this.bridgeHandler;
  86             if (location == null || bridge == null) {
  87                 logger.debug("LocationProvider.getLocation() is not set -> Will not provide any discovery results");
  88                 return;
  89             }
  90             createResults(location, bridge.getThing().getUID());
  91         }
  92     }
  93
  94     public void createResults(PointType location, ThingUID bridgeUID) {
  95         ThingUID localAirQualityThing = new ThingUID(THING_TYPE_STATION, bridgeUID, LOCAL);
  96         thingDiscovered(DiscoveryResultBuilder.create(localAirQualityThing).withLabel("Local Air Quality")
  97                 .withProperty(LOCATION, String.format("%s,%s", location.getLatitude(), location.getLongitude()))
  98                 .withBridge(bridgeUID).build());
  99     }
 100 }