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   1 /**
   2  * Copyright (c) 2010-2020 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.nzwateralerts.internal.handler;
  14
  15 import static org.openhab.binding.nzwateralerts.internal.NZWaterAlertsBindingConstants.*;
  16
  17 import org.eclipse.jdt.annotation.NonNullByDefault;
  18 import org.eclipse.jdt.annotation.Nullable;
  19 import org.eclipse.jetty.client.HttpClient;
  20 import org.openhab.binding.nzwateralerts.internal.NZWaterAlertsConfiguration;
  21 import org.openhab.binding.nzwateralerts.internal.binder.NZWaterAlertsBinder;
  22 import org.openhab.binding.nzwateralerts.internal.binder.NZWaterAlertsBinderListener;
  23 import org.openhab.core.library.types.DecimalType;
  24 import org.openhab.core.thing.ChannelUID;
  25 import org.openhab.core.thing.Thing;
  26 import org.openhab.core.thing.ThingStatus;
  27 import org.openhab.core.thing.ThingStatusDetail;
  28 import org.openhab.core.thing.binding.BaseThingHandler;
  29 import org.openhab.core.types.Command;
  30 import org.openhab.core.types.RefreshType;
  31 import org.openhab.core.types.UnDefType;
  32
  33 /**
  34  * The {@link NZWaterAlertsHandler} is responsible for handling commands, which are
  35  * sent to one of the channels.
  36  *
  37  * @author Stewart Cossey - Initial contribution
  38  */
  39 @NonNullByDefault
  40 public class NZWaterAlertsHandler extends BaseThingHandler implements NZWaterAlertsBinderListener {
  41
  42     private @Nullable NZWaterAlertsConfiguration config = null;
  43     private HttpClient httpClient;
  44     private @Nullable NZWaterAlertsBinder binder = null;
  45
  46     public NZWaterAlertsHandler(Thing thing, HttpClient httpClient) {
  47         super(thing);
  48
  49         this.httpClient = httpClient;
  50     }
  51
  52     @Override
  53     public void handleCommand(ChannelUID channelUID, Command command) {
  54         final NZWaterAlertsBinder localBinder = binder;
  55         if (CHANNEL_ALERTLEVEL.equals(channelUID.getId())) {
  56             if (command instanceof RefreshType) {
  57                 if (localBinder != null)
  58                     localBinder.update();
  59             }
  60         }
  61     }
  62
  63     @Override
  64     public void initialize() {
  65         config = getConfigAs(NZWaterAlertsConfiguration.class);
  66
  67         NZWaterAlertsBinder localBinder = binder = new NZWaterAlertsBinder(httpClient, config, scheduler);
  68
  69         updateStatus(ThingStatus.UNKNOWN);
  70         localBinder.registerListener(this);
  71     }
  72
  73     @Override
  74     public void dispose() {
  75         NZWaterAlertsBinder localBinder = binder;
  76         if (localBinder != null) {
  77             localBinder.unregisterListener(this);
  78         }
  79
  80         super.dispose();
  81     }
  82
  83     @Override
  84     public void handleRemoval() {
  85         NZWaterAlertsBinder localBinder = binder;
  86         if (localBinder != null) {
  87             localBinder.unregisterListener(this);
  88         }
  89
  90         super.handleRemoval();
  91     }
  92
  93     @Override
  94     public void updateWaterLevel(int level) {
  95         if (level == -1) {
  96             updateState(new ChannelUID(getThing().getUID(), CHANNEL_ALERTLEVEL), UnDefType.UNDEF);
  97         } else {
  98             updateState(new ChannelUID(getThing().getUID(), CHANNEL_ALERTLEVEL), new DecimalType(level));
  99         }
 100     }
 101
 102     @Override
 103     public void updateBindingStatus(ThingStatus thingStatus) {
 104         updateStatus(thingStatus);
 105     }
 106
 107     @Override
 108     public void updateBindingStatus(ThingStatus thingStatus, ThingStatusDetail thingStatusDetail, String description) {
 109         updateStatus(thingStatus, thingStatusDetail, description);
 110     }
 111 }