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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.gardena.internal.discovery;
  14
  15 import static org.openhab.binding.gardena.internal.GardenaBindingConstants.BINDING_ID;
  16
  17 import java.util.Collections;
  18 import java.util.concurrent.CancellationException;
  19 import java.util.concurrent.Future;
  20 import java.util.stream.Collectors;
  21 import java.util.stream.Stream;
  22
  23 import org.eclipse.jdt.annotation.NonNullByDefault;
  24 import org.eclipse.jdt.annotation.Nullable;
  25 import org.openhab.binding.gardena.internal.GardenaSmart;
  26 import org.openhab.binding.gardena.internal.exception.GardenaException;
  27 import org.openhab.binding.gardena.internal.handler.GardenaAccountHandler;
  28 import org.openhab.binding.gardena.internal.model.dto.Device;
  29 import org.openhab.binding.gardena.internal.util.PropertyUtils;
  30 import org.openhab.binding.gardena.internal.util.UidUtils;
  31 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  32 import org.openhab.core.config.discovery.DiscoveryResult;
  33 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  34 import org.openhab.core.config.discovery.DiscoveryService;
  35 import org.openhab.core.thing.Thing;
  36 import org.openhab.core.thing.ThingTypeUID;
  37 import org.openhab.core.thing.ThingUID;
  38 import org.openhab.core.thing.binding.ThingHandler;
  39 import org.openhab.core.thing.binding.ThingHandlerService;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 /**
  44  * The {@link GardenaDeviceDiscoveryService} is used to discover devices that are connected to Gardena smart system.
  45  *
  46  * @author Gerhard Riegler - Initial contribution
  47  */
  48 @NonNullByDefault
  49 public class GardenaDeviceDiscoveryService extends AbstractDiscoveryService
  50         implements DiscoveryService, ThingHandlerService {
  51
  52     private final Logger logger = LoggerFactory.getLogger(GardenaDeviceDiscoveryService.class);
  53     private static final int DISCOVER_TIMEOUT_SECONDS = 5;
  54
  55     private @NonNullByDefault({}) GardenaAccountHandler accountHandler;
  56     private @Nullable Future<?> scanFuture;
  57
  58     public GardenaDeviceDiscoveryService() {
  59         super(Collections.unmodifiableSet(Stream.of(new ThingTypeUID(BINDING_ID, "-")).collect(Collectors.toSet())),
  60                 DISCOVER_TIMEOUT_SECONDS, false);
  61     }
  62
  63     @Override
  64     public void setThingHandler(@Nullable ThingHandler handler) {
  65         if (handler instanceof GardenaAccountHandler) {
  66             this.accountHandler = (GardenaAccountHandler) handler;
  67             this.accountHandler.setDiscoveryService(this);
  68         }
  69     }
  70
  71     @Override
  72     public @Nullable ThingHandler getThingHandler() {
  73         return accountHandler;
  74     }
  75
  76     /**
  77      * Called on component activation.
  78      */
  79     @Override
  80     public void activate() {
  81         super.activate(null);
  82     }
  83
  84     @Override
  85     public void deactivate() {
  86         super.deactivate();
  87     }
  88
  89     @Override
  90     protected void startScan() {
  91         logger.debug("Starting Gardena discovery scan");
  92         loadDevices();
  93     }
  94
  95     @Override
  96     public void stopScan() {
  97         logger.debug("Stopping Gardena discovery scan");
  98         final Future<?> scanFuture = this.scanFuture;
  99         if (scanFuture != null) {
 100             scanFuture.cancel(true);
 101         }
 102         super.stopScan();
 103     }
 104
 105     /**
 106      * Starts a thread which loads all Gardena devices registered in the account.
 107      */
 108     private void loadDevices() {
 109         if (scanFuture == null) {
 110             scanFuture = scheduler.submit(() -> {
 111                 GardenaSmart gardena = accountHandler.getGardenaSmart();
 112                 if (gardena != null) {
 113                     for (Device device : gardena.getAllDevices()) {
 114                         deviceDiscovered(device);
 115                     }
 116
 117                     for (Thing thing : accountHandler.getThing().getThings()) {
 118                         try {
 119                             gardena.getDevice(UidUtils.getGardenaDeviceId(thing));
 120                         } catch (GardenaException ex) {
 121                             thingRemoved(thing.getUID());
 122                         }
 123                     }
 124
 125                     logger.debug("Finished Gardena device discovery scan on gateway '{}'", gardena.getId());
 126                     scanFuture = null;
 127                     removeOlderResults(getTimestampOfLastScan());
 128                 }
 129             });
 130         } else {
 131             logger.debug("Gardena device discovery scan in progress");
 132         }
 133     }
 134
 135     /**
 136      * Waits for the discovery scan to finish and then returns.
 137      */
 138     public void waitForScanFinishing() {
 139         final Future<?> scanFuture = this.scanFuture;
 140         if (scanFuture != null) {
 141             logger.debug("Waiting for finishing Gardena device discovery scan");
 142             try {
 143                 scanFuture.get();
 144                 logger.debug("Gardena device discovery scan finished");
 145             } catch (CancellationException ex) {
 146                 // ignore
 147             } catch (Exception ex) {
 148                 logger.error("Error waiting for device discovery scan: {}", ex.getMessage(), ex);
 149             }
 150         }
 151     }
 152
 153     /**
 154      * Generates the DiscoveryResult from a Gardena device.
 155      */
 156     public void deviceDiscovered(Device device) {
 157         if (device.active) {
 158             ThingUID accountUID = accountHandler.getThing().getUID();
 159             ThingUID thingUID = UidUtils.generateThingUID(device, accountHandler.getThing());
 160
 161             try {
 162                 DiscoveryResult discoveryResult = DiscoveryResultBuilder.create(thingUID).withBridge(accountUID)
 163                         .withLabel(PropertyUtils.getPropertyValue(device, "common.attributes.name.value", String.class))
 164                         .withProperty("id", device.id).withProperty("type", device.deviceType)
 165                         .withRepresentationProperty("id").build();
 166                 thingDiscovered(discoveryResult);
 167             } catch (GardenaException ex) {
 168                 logger.warn("{}", ex.getMessage());
 169             }
 170         }
 171     }
 172 }