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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.revogi.internal.api;
  14
  15 import java.util.List;
  16 import java.util.concurrent.CompletableFuture;
  17 import java.util.stream.Collectors;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.openhab.binding.revogi.internal.udp.UdpResponseDTO;
  21 import org.openhab.binding.revogi.internal.udp.UdpSenderService;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 import com.google.gson.Gson;
  26 import com.google.gson.GsonBuilder;
  27 import com.google.gson.JsonSyntaxException;
  28
  29 /**
  30  * The {@link RevogiDiscoveryService} helps to discover smart strips within your network
  31  *
  32  * @author Andi Bräu - Initial contribution
  33  */
  34 @NonNullByDefault
  35 public class RevogiDiscoveryService {
  36     private static final String UDP_DISCOVERY_QUERY = "00sw=all,,,;";
  37     private final Logger logger = LoggerFactory.getLogger(RevogiDiscoveryService.class);
  38
  39     private final Gson gson = new GsonBuilder().create();
  40     private final UdpSenderService udpSenderService;
  41
  42     public RevogiDiscoveryService(UdpSenderService udpSenderService) {
  43         this.udpSenderService = udpSenderService;
  44     }
  45
  46     public CompletableFuture<List<DiscoveryRawResponseDTO>> discoverSmartStrips() {
  47         CompletableFuture<List<UdpResponseDTO>> responses = udpSenderService.broadcastUdpDatagram(UDP_DISCOVERY_QUERY);
  48         return responses.thenApply(futureList -> futureList.stream().filter(response -> !response.getAnswer().isEmpty())
  49                 .map(this::deserializeString).filter(discoveryRawResponse -> discoveryRawResponse.getResponse() == 0)
  50                 .collect(Collectors.toList()));
  51     }
  52
  53     private DiscoveryRawResponseDTO deserializeString(UdpResponseDTO response) {
  54         try {
  55             DiscoveryRawResponseDTO discoveryRawResponse = gson.fromJson(response.getAnswer(),
  56                     DiscoveryRawResponseDTO.class);
  57             discoveryRawResponse.setIpAddress(response.getIpAddress());
  58             return discoveryRawResponse;
  59         } catch (JsonSyntaxException e) {
  60             logger.warn("Could not parse string \"{}\" to DiscoveryRawResponse", response, e);
  61             return new DiscoveryRawResponseDTO(503, new DiscoveryResponseDTO());
  62         }
  63     }
  64 }