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