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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.spotify.internal.discovery;
  14
  15 import static org.openhab.binding.spotify.internal.SpotifyBindingConstants.PROPERTY_SPOTIFY_DEVICE_NAME;
  16 import static org.openhab.binding.spotify.internal.SpotifyBindingConstants.THING_TYPE_DEVICE;
  17
  18 import java.time.Duration;
  19 import java.util.HashMap;
  20 import java.util.Map;
  21 import java.util.Set;
  22 import java.util.concurrent.ScheduledFuture;
  23 import java.util.concurrent.TimeUnit;
  24
  25 import org.eclipse.jdt.annotation.NonNullByDefault;
  26 import org.eclipse.jdt.annotation.Nullable;
  27 import org.openhab.binding.spotify.internal.SpotifyAccountHandler;
  28 import org.openhab.binding.spotify.internal.SpotifyBindingConstants;
  29 import org.openhab.binding.spotify.internal.api.model.Device;
  30 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  31 import org.openhab.core.config.discovery.DiscoveryResult;
  32 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  33 import org.openhab.core.config.discovery.DiscoveryService;
  34 import org.openhab.core.thing.ThingTypeUID;
  35 import org.openhab.core.thing.ThingUID;
  36 import org.openhab.core.thing.binding.ThingHandler;
  37 import org.openhab.core.thing.binding.ThingHandlerService;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 /**
  42  * The {@link SpotifyDeviceDiscoveryService} queries the Spotify Web API for available devices.
  43  *
  44  * @author Andreas Stenlund - Initial contribution
  45  * @author Hilbrand Bouwkamp - Simplfied code to make call to shared code
  46  */
  47 @NonNullByDefault
  48 public class SpotifyDeviceDiscoveryService extends AbstractDiscoveryService
  49         implements DiscoveryService, ThingHandlerService {
  50
  51     // id for device is derived by stripping id of device with this length
  52     private static final int PLAYER_ID_LENGTH = 4;
  53     // Only devices can be discovered. A bridge must be manually added.
  54     private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Set.of(THING_TYPE_DEVICE);
  55     // The call to listDevices is fast
  56     private static final int DISCOVERY_TIME_SECONDS = 10;
  57     // Check every minute for new devices
  58     private static final long BACKGROUND_SCAN_REFRESH_MINUTES = 1;
  59     // Time to life for discovered things.
  60     private static final long TTL_SECONDS = Duration.ofHours(1).toSeconds();
  61
  62     private final Logger logger = LoggerFactory.getLogger(SpotifyDeviceDiscoveryService.class);
  63
  64     private @NonNullByDefault({}) SpotifyAccountHandler bridgeHandler;
  65     private @NonNullByDefault({}) ThingUID bridgeUID;
  66
  67     private @Nullable ScheduledFuture<?> backgroundFuture;
  68
  69     public SpotifyDeviceDiscoveryService() {
  70         super(SUPPORTED_THING_TYPES_UIDS, DISCOVERY_TIME_SECONDS);
  71     }
  72
  73     @Override
  74     public Set<ThingTypeUID> getSupportedThingTypes() {
  75         return SUPPORTED_THING_TYPES_UIDS;
  76     }
  77
  78     @Override
  79     public void activate() {
  80         final Map<String, Object> properties = new HashMap<>();
  81         properties.put(DiscoveryService.CONFIG_PROPERTY_BACKGROUND_DISCOVERY, Boolean.TRUE);
  82         super.activate(properties);
  83     }
  84
  85     @Override
  86     public void deactivate() {
  87         super.deactivate();
  88     }
  89
  90     @Override
  91     public void setThingHandler(@Nullable ThingHandler handler) {
  92         if (handler instanceof SpotifyAccountHandler accountHandler) {
  93             bridgeHandler = accountHandler;
  94             bridgeUID = bridgeHandler.getUID();
  95         }
  96     }
  97
  98     @Override
  99     public @Nullable ThingHandler getThingHandler() {
 100         return bridgeHandler;
 101     }
 102
 103     @Override
 104     protected synchronized void startBackgroundDiscovery() {
 105         stopBackgroundDiscovery();
 106         backgroundFuture = scheduler.scheduleWithFixedDelay(this::startScan, BACKGROUND_SCAN_REFRESH_MINUTES,
 107                 BACKGROUND_SCAN_REFRESH_MINUTES, TimeUnit.MINUTES);
 108     }
 109
 110     @Override
 111     protected synchronized void stopBackgroundDiscovery() {
 112         if (backgroundFuture != null) {
 113             backgroundFuture.cancel(true);
 114             backgroundFuture = null;
 115         }
 116     }
 117
 118     @Override
 119     protected void startScan() {
 120         // If the bridge is not online no other thing devices can be found, so no reason to scan at this moment.
 121         removeOlderResults(getTimestampOfLastScan());
 122         if (bridgeHandler.isOnline()) {
 123             logger.debug("Starting Spotify Device discovery for bridge {}", bridgeUID);
 124             try {
 125                 bridgeHandler.listDevices().forEach(this::thingDiscovered);
 126             } catch (final RuntimeException e) {
 127                 logger.debug("Finding devices failed with message: {}", e.getMessage(), e);
 128             }
 129         }
 130     }
 131
 132     private void thingDiscovered(Device device) {
 133         final Map<String, Object> properties = new HashMap<>();
 134
 135         properties.put(PROPERTY_SPOTIFY_DEVICE_NAME, device.getName());
 136         final ThingUID thing = new ThingUID(SpotifyBindingConstants.THING_TYPE_DEVICE, bridgeUID,
 137                 device.getId().substring(0, PLAYER_ID_LENGTH));
 138
 139         final DiscoveryResult discoveryResult = DiscoveryResultBuilder.create(thing).withBridge(bridgeUID)
 140                 .withProperties(properties).withRepresentationProperty(PROPERTY_SPOTIFY_DEVICE_NAME)
 141                 .withTTL(TTL_SECONDS).withLabel(device.getName()).build();
 142
 143         thingDiscovered(discoveryResult);
 144     }
 145 }