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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.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.Collections;
  20 import java.util.HashMap;
  21 import java.util.Map;
  22 import java.util.Set;
  23 import java.util.concurrent.ScheduledFuture;
  24 import java.util.concurrent.TimeUnit;
  25
  26 import org.eclipse.jdt.annotation.NonNullByDefault;
  27 import org.eclipse.jdt.annotation.Nullable;
  28 import org.openhab.binding.spotify.internal.SpotifyAccountHandler;
  29 import org.openhab.binding.spotify.internal.SpotifyBindingConstants;
  30 import org.openhab.binding.spotify.internal.api.model.Device;
  31 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  32 import org.openhab.core.config.discovery.DiscoveryResult;
  33 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  34 import org.openhab.core.config.discovery.DiscoveryService;
  35 import org.openhab.core.thing.ThingTypeUID;
  36 import org.openhab.core.thing.ThingUID;
  37 import org.openhab.core.thing.binding.ThingHandler;
  38 import org.openhab.core.thing.binding.ThingHandlerService;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41
  42 /**
  43  * The {@link SpotifyDeviceDiscoveryService} queries the Spotify Web API for available devices.
  44  *
  45  * @author Andreas Stenlund - Initial contribution
  46  * @author Hilbrand Bouwkamp - Simplfied code to make call to shared code
  47  */
  48 @NonNullByDefault
  49 public class SpotifyDeviceDiscoveryService extends AbstractDiscoveryService
  50         implements DiscoveryService, ThingHandlerService {
  51
  52     // id for device is derived by stripping id of device with this length
  53     private static final int PLAYER_ID_LENGTH = 4;
  54     // Only devices can be discovered. A bridge must be manually added.
  55     private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Collections.singleton(THING_TYPE_DEVICE);
  56     // The call to listDevices is fast
  57     private static final int DISCOVERY_TIME_SECONDS = 10;
  58     // Check every minute for new devices
  59     private static final long BACKGROUND_SCAN_REFRESH_MINUTES = 1;
  60     // Time to life for discovered things.
  61     private static final long TTL_SECONDS = Duration.ofHours(1).toSeconds();
  62
  63     private final Logger logger = LoggerFactory.getLogger(SpotifyDeviceDiscoveryService.class);
  64
  65     private @NonNullByDefault({}) SpotifyAccountHandler bridgeHandler;
  66     private @NonNullByDefault({}) ThingUID bridgeUID;
  67
  68     private @Nullable ScheduledFuture<?> backgroundFuture;
  69
  70     public SpotifyDeviceDiscoveryService() {
  71         super(SUPPORTED_THING_TYPES_UIDS, DISCOVERY_TIME_SECONDS);
  72     }
  73
  74     @Override
  75     public Set<ThingTypeUID> getSupportedThingTypes() {
  76         return SUPPORTED_THING_TYPES_UIDS;
  77     }
  78
  79     @Override
  80     public void activate() {
  81         final Map<String, Object> properties = new HashMap<>();
  82         properties.put(DiscoveryService.CONFIG_PROPERTY_BACKGROUND_DISCOVERY, Boolean.TRUE);
  83         super.activate(properties);
  84     }
  85
  86     @Override
  87     public void deactivate() {
  88         super.deactivate();
  89     }
  90
  91     @Override
  92     public void setThingHandler(@Nullable ThingHandler handler) {
  93         if (handler instanceof SpotifyAccountHandler) {
  94             bridgeHandler = (SpotifyAccountHandler) handler;
  95             bridgeUID = bridgeHandler.getUID();
  96         }
  97     }
  98
  99     @Override
 100     public @Nullable ThingHandler getThingHandler() {
 101         return bridgeHandler;
 102     }
 103
 104     @Override
 105     protected synchronized void startBackgroundDiscovery() {
 106         stopBackgroundDiscovery();
 107         backgroundFuture = scheduler.scheduleWithFixedDelay(this::startScan, BACKGROUND_SCAN_REFRESH_MINUTES,
 108                 BACKGROUND_SCAN_REFRESH_MINUTES, TimeUnit.MINUTES);
 109     }
 110
 111     @Override
 112     protected synchronized void stopBackgroundDiscovery() {
 113         if (backgroundFuture != null) {
 114             backgroundFuture.cancel(true);
 115             backgroundFuture = null;
 116         }
 117     }
 118
 119     @Override
 120     protected void startScan() {
 121         // If the bridge is not online no other thing devices can be found, so no reason to scan at this moment.
 122         removeOlderResults(getTimestampOfLastScan());
 123         if (bridgeHandler.isOnline()) {
 124             logger.debug("Starting Spotify Device discovery for bridge {}", bridgeUID);
 125             try {
 126                 bridgeHandler.listDevices().forEach(this::thingDiscovered);
 127             } catch (final RuntimeException e) {
 128                 logger.debug("Finding devices failed with message: {}", e.getMessage(), e);
 129             }
 130         }
 131     }
 132
 133     private void thingDiscovered(Device device) {
 134         final Map<String, Object> properties = new HashMap<>();
 135
 136         properties.put(PROPERTY_SPOTIFY_DEVICE_NAME, device.getName());
 137         final ThingUID thing = new ThingUID(SpotifyBindingConstants.THING_TYPE_DEVICE, bridgeUID,
 138                 device.getId().substring(0, PLAYER_ID_LENGTH));
 139
 140         final DiscoveryResult discoveryResult = DiscoveryResultBuilder.create(thing).withBridge(bridgeUID)
 141                 .withProperties(properties).withRepresentationProperty(PROPERTY_SPOTIFY_DEVICE_NAME)
 142                 .withTTL(TTL_SECONDS).withLabel(device.getName()).build();
 143
 144         thingDiscovered(discoveryResult);
 145     }
 146 }