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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.bluetooth.govee.internal.command.hygrometer;
  14
  15 import java.nio.ByteBuffer;
  16 import java.nio.ByteOrder;
  17 import java.util.concurrent.CompletableFuture;
  18
  19 import javax.measure.quantity.Dimensionless;
  20
  21 import org.eclipse.jdt.annotation.NonNullByDefault;
  22 import org.eclipse.jdt.annotation.Nullable;
  23 import org.openhab.core.library.types.OnOffType;
  24 import org.openhab.core.library.types.QuantityType;
  25 import org.openhab.core.library.unit.Units;
  26
  27 /**
  28  * @author Connor Petty - Initial Contribution
  29  *
  30  */
  31 @NonNullByDefault
  32 public class GetOrSetHumWarningCommand extends GoveeCommand {
  33
  34     private final @Nullable WarningSettingsDTO<Dimensionless> settings;
  35     private final CompletableFuture<@Nullable WarningSettingsDTO<Dimensionless>> resultHandler;
  36
  37     public GetOrSetHumWarningCommand(CompletableFuture<@Nullable WarningSettingsDTO<Dimensionless>> resultHandler) {
  38         this.settings = null;
  39         this.resultHandler = resultHandler;
  40     }
  41
  42     public GetOrSetHumWarningCommand(WarningSettingsDTO<Dimensionless> settings,
  43             CompletableFuture<@Nullable WarningSettingsDTO<Dimensionless>> resultHandler) {
  44         this.settings = settings;
  45         this.resultHandler = resultHandler;
  46     }
  47
  48     @Override
  49     public byte getCommandType() {
  50         return settings == null ? READ_TYPE : WRITE_TYPE;
  51     }
  52
  53     @Override
  54     public byte getCommandCode() {
  55         return 3;
  56     }
  57
  58     private static short convertQuantity(QuantityType<Dimensionless> quantity) {
  59         var percentQuantity = quantity.toUnit(Units.PERCENT);
  60         if (percentQuantity == null) {
  61             throw new IllegalArgumentException("Unable to convert quantity to percent");
  62         }
  63         return (short) (percentQuantity.doubleValue() * 100);
  64     }
  65
  66     @Override
  67     protected byte @Nullable [] getData() {
  68         if (settings == null) {
  69             return null;
  70         }
  71
  72         ByteBuffer buffer = ByteBuffer.allocate(5).order(ByteOrder.LITTLE_ENDIAN);
  73         buffer.put(settings.enableAlarm == OnOffType.ON ? (byte) 1 : 0);
  74         buffer.putShort(convertQuantity(settings.min));
  75         buffer.putShort(convertQuantity(settings.max));
  76         return buffer.array();
  77     }
  78
  79     @Override
  80     public void handleResponse(byte @Nullable [] data, @Nullable Throwable th) {
  81         if (th != null) {
  82             resultHandler.completeExceptionally(th);
  83         }
  84         if (data != null) {
  85             WarningSettingsDTO<Dimensionless> result = new WarningSettingsDTO<Dimensionless>();
  86
  87             ByteBuffer buffer = ByteBuffer.wrap(data).order(ByteOrder.LITTLE_ENDIAN);
  88             result.enableAlarm = OnOffType.from(buffer.get() == 1);
  89             result.min = new QuantityType<Dimensionless>(buffer.getShort() / 100.0, Units.PERCENT);
  90             result.max = new QuantityType<Dimensionless>(buffer.getShort() / 100.0, Units.PERCENT);
  91
  92             resultHandler.complete(result);
  93         } else {
  94             resultHandler.complete(null);
  95         }
  96     }
  97 }