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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.Collections;
  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.openhab.core.config.discovery.DiscoveryResult;
  24 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  25 import org.openhab.core.config.discovery.mdns.MDNSDiscoveryParticipant;
  26 import org.openhab.core.thing.ThingTypeUID;
  27 import org.openhab.core.thing.ThingUID;
  28 import org.osgi.service.component.annotations.Component;
  29
  30 /**
  31  * The {@link HyperionDiscoveryParticipant} class is responsible for listening
  32  * to MDNS responses and discovering Hyperion.ng servers.
  33  *
  34  * @author Daniel Walters - Initial contribution
  35  */
  36
  37 @Component
  38 public class HyperionDiscoveryParticipant implements MDNSDiscoveryParticipant {
  39
  40     @Override
  41     public Set<ThingTypeUID> getSupportedThingTypeUIDs() {
  42         return Collections.singleton(HyperionBindingConstants.THING_TYPE_SERVER_NG);
  43     }
  44
  45     @Override
  46     public String getServiceType() {
  47         return "_hyperiond-json._tcp.local.";
  48     }
  49
  50     @Override
  51     public DiscoveryResult createResult(ServiceInfo service) {
  52         DiscoveryResult result = null;
  53
  54         // return null if the service info is invalid / not fully formed
  55         if (service.getHostAddresses().length == 0) {
  56             return null;
  57         }
  58
  59         final Map<String, Object> properties = new HashMap<>(2);
  60         String host = service.getHostAddresses()[0];
  61         BigDecimal port = new BigDecimal(service.getPort());
  62
  63         properties.put(HyperionBindingConstants.HOST, host);
  64         properties.put(HyperionBindingConstants.PORT, port);
  65
  66         String longName = service.getName();
  67         int pos = longName.indexOf("@");
  68         if (pos < 0 || pos >= longName.length()) {
  69             return null;
  70         }
  71
  72         String friendlyName = longName.substring(0, pos);
  73         ThingUID uid = getThingUID(service);
  74         if (uid != null) {
  75             result = DiscoveryResultBuilder.create(uid).withThingType(HyperionBindingConstants.THING_TYPE_SERVER_NG)
  76                     .withProperties(properties).withLabel(friendlyName).build();
  77         }
  78         return result;
  79     }
  80
  81     @Override
  82     public ThingUID getThingUID(ServiceInfo service) {
  83         String uid = service.getPropertyString("id");
  84         if (uid == null) {
  85             String longName = service.getName();
  86             int hashCode = longName.hashCode();
  87             uid = Integer.toUnsignedString(hashCode);
  88         }
  89         return new ThingUID(HyperionBindingConstants.THING_TYPE_SERVER_NG, uid);
  90     }
  91 }