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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.hdpowerview.internal.discovery;
  14
  15 import java.util.Collections;
  16 import java.util.List;
  17 import java.util.concurrent.ScheduledFuture;
  18 import java.util.concurrent.TimeUnit;
  19
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.eclipse.jdt.annotation.Nullable;
  22 import org.openhab.binding.hdpowerview.internal.HDPowerViewBindingConstants;
  23 import org.openhab.binding.hdpowerview.internal.HDPowerViewWebTargets;
  24 import org.openhab.binding.hdpowerview.internal.HubMaintenanceException;
  25 import org.openhab.binding.hdpowerview.internal.HubProcessingException;
  26 import org.openhab.binding.hdpowerview.internal.api.responses.Shades;
  27 import org.openhab.binding.hdpowerview.internal.api.responses.Shades.ShadeData;
  28 import org.openhab.binding.hdpowerview.internal.config.HDPowerViewShadeConfiguration;
  29 import org.openhab.binding.hdpowerview.internal.handler.HDPowerViewHubHandler;
  30 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  31 import org.openhab.core.config.discovery.DiscoveryResult;
  32 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  33 import org.openhab.core.thing.ThingUID;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 import com.google.gson.JsonParseException;
  38
  39 /**
  40  * Discovers an HD PowerView Shade from an existing hub
  41  *
  42  * @author Andy Lintner - Initial contribution
  43  */
  44 @NonNullByDefault
  45 public class HDPowerViewShadeDiscoveryService extends AbstractDiscoveryService {
  46
  47     private final Logger logger = LoggerFactory.getLogger(HDPowerViewShadeDiscoveryService.class);
  48     private final HDPowerViewHubHandler hub;
  49     private final Runnable scanner;
  50     private @Nullable ScheduledFuture<?> backgroundFuture;
  51
  52     public HDPowerViewShadeDiscoveryService(HDPowerViewHubHandler hub) {
  53         super(Collections.singleton(HDPowerViewBindingConstants.THING_TYPE_SHADE), 600, true);
  54         this.hub = hub;
  55         this.scanner = createScanner();
  56     }
  57
  58     @Override
  59     protected void startScan() {
  60         scheduler.execute(scanner);
  61     }
  62
  63     @Override
  64     protected void startBackgroundDiscovery() {
  65         ScheduledFuture<?> backgroundFuture = this.backgroundFuture;
  66         if (backgroundFuture != null && !backgroundFuture.isDone()) {
  67             backgroundFuture.cancel(true);
  68         }
  69         this.backgroundFuture = scheduler.scheduleWithFixedDelay(scanner, 0, 60, TimeUnit.SECONDS);
  70     }
  71
  72     @Override
  73     protected void stopBackgroundDiscovery() {
  74         ScheduledFuture<?> backgroundFuture = this.backgroundFuture;
  75         if (backgroundFuture != null && !backgroundFuture.isDone()) {
  76             backgroundFuture.cancel(true);
  77             this.backgroundFuture = null;
  78         }
  79         super.stopBackgroundDiscovery();
  80     }
  81
  82     private Runnable createScanner() {
  83         return () -> {
  84             try {
  85                 HDPowerViewWebTargets webTargets = hub.getWebTargets();
  86                 if (webTargets == null) {
  87                     throw new HubProcessingException("Web targets not initialized");
  88                 }
  89                 Shades shades = webTargets.getShades();
  90                 if (shades != null && shades.shadeData != null) {
  91                     ThingUID bridgeUID = hub.getThing().getUID();
  92                     List<ShadeData> shadesData = shades.shadeData;
  93                     if (shadesData != null) {
  94                         for (ShadeData shadeData : shadesData) {
  95                             if (shadeData.id != 0) {
  96                                 String id = Integer.toString(shadeData.id);
  97                                 ThingUID thingUID = new ThingUID(HDPowerViewBindingConstants.THING_TYPE_SHADE,
  98                                         bridgeUID, id);
  99                                 DiscoveryResult result = DiscoveryResultBuilder.create(thingUID)
 100                                         .withProperty(HDPowerViewShadeConfiguration.ID, id)
 101                                         .withRepresentationProperty(HDPowerViewShadeConfiguration.ID)
 102                                         .withLabel(shadeData.getName()).withBridge(bridgeUID).build();
 103                                 logger.debug("Hub discovered shade '{}'", id);
 104                                 thingDiscovered(result);
 105                             }
 106                         }
 107                     }
 108                 }
 109             } catch (HubProcessingException | JsonParseException e) {
 110                 logger.warn("Unexpected error: {}", e.getMessage());
 111             } catch (HubMaintenanceException e) {
 112                 // exceptions are logged in HDPowerViewWebTargets
 113             }
 114             stopScan();
 115         };
 116     }
 117 }