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   1 /**
   2  * Copyright (c) 2010-2021 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.chromecast.internal.discovery;
  14
  15 import static org.openhab.binding.chromecast.internal.ChromecastBindingConstants.*;
  16
  17 import java.util.HashMap;
  18 import java.util.Map;
  19 import java.util.Set;
  20
  21 import javax.jmdns.ServiceInfo;
  22
  23 import org.eclipse.jdt.annotation.NonNullByDefault;
  24 import org.eclipse.jdt.annotation.Nullable;
  25 import org.openhab.core.config.discovery.DiscoveryResult;
  26 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  27 import org.openhab.core.config.discovery.mdns.MDNSDiscoveryParticipant;
  28 import org.openhab.core.thing.ThingTypeUID;
  29 import org.openhab.core.thing.ThingUID;
  30 import org.osgi.service.component.annotations.Component;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 /**
  35  * The {@link ChromecastDiscoveryParticipant} is responsible for discovering Chromecast devices through UPnP.
  36  *
  37  * @author Kai Kreuzer - Initial contribution
  38  * @author Daniel Walters - Change discovery protocol to mDNS
  39  */
  40 @Component
  41 @NonNullByDefault
  42 public class ChromecastDiscoveryParticipant implements MDNSDiscoveryParticipant {
  43     private final Logger logger = LoggerFactory.getLogger(ChromecastDiscoveryParticipant.class);
  44
  45     private static final String PROPERTY_MODEL = "md";
  46     private static final String PROPERTY_FRIENDLY_NAME = "fn";
  47     private static final String PROPERTY_DEVICE_ID = "id";
  48     private static final String SERVICE_TYPE = "_googlecast._tcp.local.";
  49
  50     @Override
  51     public Set<ThingTypeUID> getSupportedThingTypeUIDs() {
  52         return SUPPORTED_THING_TYPES_UIDS;
  53     }
  54
  55     @Override
  56     public String getServiceType() {
  57         return SERVICE_TYPE;
  58     }
  59
  60     @Override
  61     public @Nullable DiscoveryResult createResult(ServiceInfo service) {
  62         final ThingUID uid = getThingUID(service);
  63         if (uid == null) {
  64             return null;
  65         }
  66
  67         final Map<String, Object> properties = new HashMap<>(5);
  68         String host = service.getHostAddresses()[0];
  69         properties.put(HOST, host);
  70         int port = service.getPort();
  71         properties.put(PORT, port);
  72         logger.debug("Chromecast Found: {} {}", host, port);
  73         String id = service.getPropertyString(PROPERTY_DEVICE_ID);
  74         properties.put(DEVICE_ID, id);
  75         String friendlyName = service.getPropertyString(PROPERTY_FRIENDLY_NAME); // friendly name;
  76
  77         final DiscoveryResult result = DiscoveryResultBuilder.create(uid).withThingType(getThingType(service))
  78                 .withProperties(properties).withRepresentationProperty(DEVICE_ID).withLabel(friendlyName).build();
  79
  80         return result;
  81     }
  82
  83     private @Nullable ThingTypeUID getThingType(final ServiceInfo service) {
  84         String model = service.getPropertyString(PROPERTY_MODEL); // model
  85         logger.debug("Chromecast Type: {}", model);
  86         if (model == null) {
  87             return null;
  88         }
  89         switch (model) {
  90             case "Chromecast Audio":
  91                 return THING_TYPE_AUDIO;
  92             case "Google Cast Group":
  93                 return THING_TYPE_AUDIOGROUP;
  94             default:
  95                 return THING_TYPE_CHROMECAST;
  96         }
  97     }
  98
  99     @Override
 100     public @Nullable ThingUID getThingUID(ServiceInfo service) {
 101         ThingTypeUID thingTypeUID = getThingType(service);
 102         if (thingTypeUID != null) {
 103             String id = service.getPropertyString(PROPERTY_DEVICE_ID); // device id
 104             return new ThingUID(thingTypeUID, id);
 105         } else {
 106             return null;
 107         }
 108     }
 109 }