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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 javax.ws.rs.ProcessingException;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.eclipse.jdt.annotation.Nullable;
  24 import org.openhab.binding.hdpowerview.internal.HDPowerViewBindingConstants;
  25 import org.openhab.binding.hdpowerview.internal.HDPowerViewWebTargets;
  26 import org.openhab.binding.hdpowerview.internal.HubMaintenanceException;
  27 import org.openhab.binding.hdpowerview.internal.api.responses.Shades;
  28 import org.openhab.binding.hdpowerview.internal.api.responses.Shades.ShadeData;
  29 import org.openhab.binding.hdpowerview.internal.config.HDPowerViewShadeConfiguration;
  30 import org.openhab.binding.hdpowerview.internal.handler.HDPowerViewHubHandler;
  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.thing.ThingUID;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 import com.google.gson.JsonParseException;
  39
  40 /**
  41  * Discovers an HD PowerView Shade from an existing hub
  42  *
  43  * @author Andy Lintner - Initial contribution
  44  */
  45 @NonNullByDefault
  46 public class HDPowerViewShadeDiscoveryService extends AbstractDiscoveryService {
  47
  48     private final Logger logger = LoggerFactory.getLogger(HDPowerViewShadeDiscoveryService.class);
  49     private final HDPowerViewHubHandler hub;
  50     private final Runnable scanner;
  51     private @Nullable ScheduledFuture<?> backgroundFuture;
  52
  53     public HDPowerViewShadeDiscoveryService(HDPowerViewHubHandler hub) {
  54         super(Collections.singleton(HDPowerViewBindingConstants.THING_TYPE_SHADE), 600, true);
  55         this.hub = hub;
  56         this.scanner = createScanner();
  57     }
  58
  59     @Override
  60     protected void startScan() {
  61         scheduler.execute(scanner);
  62     }
  63
  64     @Override
  65     protected void startBackgroundDiscovery() {
  66         ScheduledFuture<?> backgroundFuture = this.backgroundFuture;
  67         if (backgroundFuture != null && !backgroundFuture.isDone()) {
  68             backgroundFuture.cancel(true);
  69         }
  70         this.backgroundFuture = scheduler.scheduleWithFixedDelay(scanner, 0, 60, TimeUnit.SECONDS);
  71     }
  72
  73     @Override
  74     protected void stopBackgroundDiscovery() {
  75         ScheduledFuture<?> backgroundFuture = this.backgroundFuture;
  76         if (backgroundFuture != null && !backgroundFuture.isDone()) {
  77             backgroundFuture.cancel(true);
  78             this.backgroundFuture = null;
  79         }
  80         super.stopBackgroundDiscovery();
  81     }
  82
  83     private Runnable createScanner() {
  84         return () -> {
  85             try {
  86                 HDPowerViewWebTargets webTargets = hub.getWebTargets();
  87                 if (webTargets == null) {
  88                     throw new ProcessingException("Web targets not initialized");
  89                 }
  90                 Shades shades = webTargets.getShades();
  91                 if (shades != null && shades.shadeData != null) {
  92                     ThingUID bridgeUID = hub.getThing().getUID();
  93                     List<ShadeData> shadesData = shades.shadeData;
  94                     if (shadesData != null) {
  95                         for (ShadeData shadeData : shadesData) {
  96                             if (shadeData.id != 0) {
  97                                 String id = Integer.toString(shadeData.id);
  98                                 ThingUID thingUID = new ThingUID(HDPowerViewBindingConstants.THING_TYPE_SHADE,
  99                                         bridgeUID, id);
 100                                 DiscoveryResult result = DiscoveryResultBuilder.create(thingUID)
 101                                         .withProperty(HDPowerViewShadeConfiguration.ID, id)
 102                                         .withRepresentationProperty(HDPowerViewShadeConfiguration.ID)
 103                                         .withLabel(shadeData.getName()).withBridge(bridgeUID).build();
 104                                 logger.debug("Hub discovered shade '{}'", id);
 105                                 thingDiscovered(result);
 106                             }
 107                         }
 108                     }
 109                 }
 110             } catch (ProcessingException | JsonParseException e) {
 111                 logger.warn("Unexpected error: {}", e.getMessage());
 112             } catch (HubMaintenanceException e) {
 113                 // exceptions are logged in HDPowerViewWebTargets
 114             }
 115             stopScan();
 116         };
 117     }
 118 }