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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.nikohomecontrol.internal.discovery;
  14
  15 import static org.openhab.binding.nikohomecontrol.internal.NikoHomeControlBindingConstants.*;
  16
  17 import java.io.IOException;
  18 import java.net.InetAddress;
  19 import java.util.concurrent.ScheduledFuture;
  20 import java.util.concurrent.TimeUnit;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.eclipse.jdt.annotation.Nullable;
  24 import org.openhab.binding.nikohomecontrol.internal.NikoHomeControlBindingConstants;
  25 import org.openhab.binding.nikohomecontrol.internal.protocol.NikoHomeControlDiscover;
  26 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  27 import org.openhab.core.config.discovery.DiscoveryResult;
  28 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  29 import org.openhab.core.config.discovery.DiscoveryService;
  30 import org.openhab.core.net.NetworkAddressService;
  31 import org.openhab.core.thing.ThingUID;
  32 import org.osgi.service.component.annotations.Component;
  33 import org.osgi.service.component.annotations.Reference;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 /**
  38  * {@link NikoHomeControlBridgeDiscoveryService} is used to discover a Niko Home Control IP-interface in the local
  39  * network.
  40  *
  41  * @author Mark Herwege - Initial Contribution
  42  */
  43 @Component(service = DiscoveryService.class, configurationPid = "discovery.nikohomecontrol")
  44 @NonNullByDefault
  45 public class NikoHomeControlBridgeDiscoveryService extends AbstractDiscoveryService {
  46
  47     private final Logger logger = LoggerFactory.getLogger(NikoHomeControlBridgeDiscoveryService.class);
  48
  49     private volatile @Nullable ScheduledFuture<?> nhcDiscoveryJob;
  50
  51     private @NonNullByDefault({}) NetworkAddressService networkAddressService;
  52
  53     private static final int TIMEOUT = 5;
  54     private static final int REFRESH_INTERVAL = 60;
  55
  56     public NikoHomeControlBridgeDiscoveryService() {
  57         super(NikoHomeControlBindingConstants.BRIDGE_THING_TYPES_UIDS, TIMEOUT);
  58         logger.debug("bridge discovery service started");
  59     }
  60
  61     /**
  62      * Discovers devices connected to a Niko Home Control controller
  63      */
  64     private void discoverBridge() {
  65         try {
  66             String broadcastAddr = networkAddressService.getConfiguredBroadcastAddress();
  67             if (broadcastAddr == null) {
  68                 logger.warn("discovery not possible, no broadcast address found");
  69                 return;
  70             }
  71             logger.debug("discovery broadcast on {}", broadcastAddr);
  72             NikoHomeControlDiscover nhcDiscover = new NikoHomeControlDiscover(broadcastAddr);
  73             if (nhcDiscover.isNhcII()) {
  74                 addNhcIIBridge(nhcDiscover.getAddr(), nhcDiscover.getNhcBridgeId());
  75             } else {
  76                 addNhcIBridge(nhcDiscover.getAddr(), nhcDiscover.getNhcBridgeId());
  77             }
  78         } catch (IOException e) {
  79             logger.debug("no bridge found.");
  80         }
  81     }
  82
  83     private void addNhcIBridge(InetAddress addr, String bridgeId) {
  84         logger.debug("NHC I bridge found at {}", addr);
  85
  86         String bridgeName = "Niko Home Control Bridge";
  87         ThingUID uid = new ThingUID(BINDING_ID, "bridge", bridgeId);
  88
  89         DiscoveryResult discoveryResult = DiscoveryResultBuilder.create(uid).withLabel(bridgeName)
  90                 .withProperty(CONFIG_HOST_NAME, addr.getHostAddress()).build();
  91         thingDiscovered(discoveryResult);
  92     }
  93
  94     private void addNhcIIBridge(InetAddress addr, String bridgeId) {
  95         logger.debug("NHC II bridge found at {}", addr);
  96
  97         String bridgeName = "Niko Home Control II Bridge";
  98         ThingUID uid = new ThingUID(BINDING_ID, "bridge2", bridgeId);
  99
 100         DiscoveryResult discoveryResult = DiscoveryResultBuilder.create(uid).withLabel(bridgeName)
 101                 .withProperty(CONFIG_HOST_NAME, addr.getHostAddress()).build();
 102         thingDiscovered(discoveryResult);
 103     }
 104
 105     @Override
 106     protected void startScan() {
 107         discoverBridge();
 108     }
 109
 110     @Override
 111     protected synchronized void stopScan() {
 112         super.stopScan();
 113         removeOlderResults(getTimestampOfLastScan());
 114     }
 115
 116     @Override
 117     protected void startBackgroundDiscovery() {
 118         logger.debug("Start background bridge discovery");
 119         ScheduledFuture<?> job = nhcDiscoveryJob;
 120         if (job == null || job.isCancelled()) {
 121             nhcDiscoveryJob = scheduler.scheduleWithFixedDelay(this::discoverBridge, 0, REFRESH_INTERVAL,
 122                     TimeUnit.SECONDS);
 123         }
 124     }
 125
 126     @Override
 127     protected void stopBackgroundDiscovery() {
 128         logger.debug("Stop bridge background discovery");
 129         ScheduledFuture<?> job = nhcDiscoveryJob;
 130         if (job != null && !job.isCancelled()) {
 131             job.cancel(true);
 132             nhcDiscoveryJob = null;
 133         }
 134     }
 135
 136     @Reference
 137     protected void setNetworkAddressService(NetworkAddressService networkAddressService) {
 138         this.networkAddressService = networkAddressService;
 139     }
 140
 141     protected void unsetNetworkAddressService(NetworkAddressService networkAddressService) {
 142         this.networkAddressService = null;
 143     }
 144 }