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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.amplipi.internal.discovery;
  14
  15 import java.net.InetAddress;
  16 import java.util.Set;
  17
  18 import javax.jmdns.ServiceInfo;
  19
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.eclipse.jdt.annotation.Nullable;
  22 import org.openhab.binding.amplipi.internal.AmpliPiBindingConstants;
  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  * This is a discovery participant which finds AmpliPis on the local network
  32  * through their mDNS announcements.
  33  *
  34  * @author Kai Kreuzer - Initial contribution
  35  *
  36  */
  37 @NonNullByDefault
  38 @Component
  39 public class AmpliPiMDNSDiscoveryParticipant implements MDNSDiscoveryParticipant {
  40
  41     private static final String AMPLIPI_API = "amplipi-api";
  42
  43     @Override
  44     public Set<ThingTypeUID> getSupportedThingTypeUIDs() {
  45         return Set.of(AmpliPiBindingConstants.THING_TYPE_CONTROLLER);
  46     }
  47
  48     @Override
  49     public String getServiceType() {
  50         return "_http._tcp.local.";
  51     }
  52
  53     @Override
  54     public @Nullable DiscoveryResult createResult(ServiceInfo service) {
  55         ThingUID uid = getThingUID(service);
  56         if (uid != null) {
  57             DiscoveryResult result = DiscoveryResultBuilder.create(uid).withLabel("AmpliPi Controller")
  58                     .withProperty(AmpliPiBindingConstants.CFG_PARAM_HOSTNAME, getIpAddress(service).getHostAddress())
  59                     .withRepresentationProperty(AmpliPiBindingConstants.CFG_PARAM_HOSTNAME).build();
  60             return result;
  61         } else {
  62             return null;
  63         }
  64     }
  65
  66     @Override
  67     public @Nullable ThingUID getThingUID(ServiceInfo service) {
  68         if (service.getName().equals(AMPLIPI_API)) {
  69             InetAddress ip = getIpAddress(service);
  70             if (ip != null) {
  71                 String id = ip.toString().substring(1).replaceAll("\\.", "");
  72                 return new ThingUID(AmpliPiBindingConstants.THING_TYPE_CONTROLLER, id);
  73             }
  74         }
  75         return null;
  76     }
  77
  78     private @Nullable InetAddress getIpAddress(ServiceInfo service) {
  79         if (service.getInet4Addresses().length > 0) {
  80             return service.getInet4Addresses()[0];
  81         } else {
  82             return null;
  83         }
  84     }
  85 }