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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.sncf.internal.discovery;
  14
  15 import static org.openhab.binding.sncf.internal.SncfBindingConstants.*;
  16
  17 import java.util.Arrays;
  18 import java.util.LinkedList;
  19 import java.util.List;
  20
  21 import org.eclipse.jdt.annotation.NonNullByDefault;
  22 import org.eclipse.jdt.annotation.Nullable;
  23 import org.openhab.binding.sncf.internal.SncfException;
  24 import org.openhab.binding.sncf.internal.dto.PlaceNearby;
  25 import org.openhab.binding.sncf.internal.handler.SncfBridgeHandler;
  26 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  27 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  28 import org.openhab.core.i18n.LocationProvider;
  29 import org.openhab.core.library.types.PointType;
  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.Activate;
  34 import org.osgi.service.component.annotations.Component;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 /**
  39  * The {@link SncfDiscoveryService} searches for available
  40  * station discoverable through API
  41  *
  42  * @author Gaël L'hopital - Initial contribution
  43  */
  44 @Component(service = ThingHandlerService.class)
  45 @NonNullByDefault
  46 public class SncfDiscoveryService extends AbstractDiscoveryService implements ThingHandlerService {
  47     private static final int SEARCH_TIME = 7;
  48
  49     private final Logger logger = LoggerFactory.getLogger(SncfDiscoveryService.class);
  50
  51     private @Nullable LocationProvider locationProvider;
  52     private @Nullable SncfBridgeHandler bridgeHandler;
  53
  54     private int searchRange = 1500;
  55
  56     @Activate
  57     public SncfDiscoveryService() {
  58         super(SUPPORTED_THING_TYPES_UIDS, SEARCH_TIME, false);
  59     }
  60
  61     @Override
  62     public void deactivate() {
  63         super.deactivate();
  64     }
  65
  66     @Override
  67     public void startScan() {
  68         SncfBridgeHandler handler = bridgeHandler;
  69         LocationProvider provider = locationProvider;
  70         if (provider != null && handler != null) {
  71             PointType location = provider.getLocation();
  72             if (location != null) {
  73                 ThingUID bridgeUID = handler.getThing().getUID();
  74                 searchRange += 500;
  75                 try {
  76                     List<PlaceNearby> places = handler.discoverNearby(location, searchRange);
  77                     if (places != null && !places.isEmpty()) {
  78                         places.forEach(place -> {
  79                             // stop_point:SNCF:87386573:Bus
  80                             List<String> idElts = new LinkedList<String>(Arrays.asList(place.id.split(":")));
  81                             idElts.remove(0);
  82                             idElts.remove(0);
  83                             thingDiscovered(DiscoveryResultBuilder
  84                                     .create(new ThingUID(STATION_THING_TYPE, bridgeUID, String.join("_", idElts)))
  85                                     .withLabel(String.format("%s (%s)", place.stopPoint.name, idElts.get(1))
  86                                             .replace("-", "_"))
  87                                     .withBridge(bridgeUID).withRepresentationProperty(STOP_POINT_ID)
  88                                     .withProperty(STOP_POINT_ID, place.id).build());
  89                         });
  90                     } else {
  91                         logger.info("No station found in a perimeter of {} m, extending search", searchRange);
  92                         startScan();
  93                     }
  94                 } catch (SncfException e) {
  95                     logger.warn("Error calling SNCF Api : {}", e.getMessage());
  96                 }
  97             } else {
  98                 logger.info("Please set a system location to enable station discovery");
  99             }
 100         }
 101     }
 102
 103     @Override
 104     public void setThingHandler(ThingHandler handler) {
 105         if (handler instanceof SncfBridgeHandler) {
 106             this.bridgeHandler = (SncfBridgeHandler) handler;
 107             this.locationProvider = ((SncfBridgeHandler) handler).getLocationProvider();
 108         }
 109     }
 110
 111     @Override
 112     public @Nullable ThingHandler getThingHandler() {
 113         return bridgeHandler;
 114     }
 115 }