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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.hyperion.internal;
  14
  15 import java.math.BigDecimal;
  16 import java.util.HashMap;
  17 import java.util.Map;
  18 import java.util.Set;
  19
  20 import javax.jmdns.ServiceInfo;
  21
  22 import org.openhab.core.config.discovery.DiscoveryResult;
  23 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  24 import org.openhab.core.config.discovery.mdns.MDNSDiscoveryParticipant;
  25 import org.openhab.core.thing.ThingTypeUID;
  26 import org.openhab.core.thing.ThingUID;
  27 import org.osgi.service.component.annotations.Component;
  28
  29 /**
  30  * The {@link HyperionDiscoveryParticipant} class is responsible for listening
  31  * to MDNS responses and discovering Hyperion.ng servers.
  32  *
  33  * @author Daniel Walters - Initial contribution
  34  */
  35
  36 @Component
  37 public class HyperionDiscoveryParticipant implements MDNSDiscoveryParticipant {
  38
  39     @Override
  40     public Set<ThingTypeUID> getSupportedThingTypeUIDs() {
  41         return Set.of(HyperionBindingConstants.THING_TYPE_SERVER_NG);
  42     }
  43
  44     @Override
  45     public String getServiceType() {
  46         return "_hyperiond-json._tcp.local.";
  47     }
  48
  49     @Override
  50     public DiscoveryResult createResult(ServiceInfo service) {
  51         DiscoveryResult result = null;
  52
  53         // return null if the service info is invalid / not fully formed
  54         if (service.getHostAddresses().length == 0) {
  55             return null;
  56         }
  57
  58         final Map<String, Object> properties = new HashMap<>(2);
  59         String host = service.getHostAddresses()[0];
  60         BigDecimal port = new BigDecimal(service.getPort());
  61
  62         properties.put(HyperionBindingConstants.HOST, host);
  63         properties.put(HyperionBindingConstants.PORT, port);
  64
  65         String longName = service.getName();
  66         int pos = longName.indexOf("@");
  67         if (pos < 0 || pos >= longName.length()) {
  68             return null;
  69         }
  70
  71         String friendlyName = longName.substring(0, pos);
  72         ThingUID uid = getThingUID(service);
  73         if (uid != null) {
  74             result = DiscoveryResultBuilder.create(uid).withThingType(HyperionBindingConstants.THING_TYPE_SERVER_NG)
  75                     .withProperties(properties).withLabel(friendlyName).build();
  76         }
  77         return result;
  78     }
  79
  80     @Override
  81     public ThingUID getThingUID(ServiceInfo service) {
  82         String uid = service.getPropertyString("id");
  83         if (uid == null) {
  84             String longName = service.getName();
  85             int hashCode = longName.hashCode();
  86             uid = Integer.toUnsignedString(hashCode);
  87         }
  88         return new ThingUID(HyperionBindingConstants.THING_TYPE_SERVER_NG, uid);
  89     }
  90 }