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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.lifx.internal.util;
  14
  15 import java.math.BigDecimal;
  16 import java.math.RoundingMode;
  17 import java.util.UUID;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.openhab.binding.lifx.internal.LifxProduct.TemperatureRange;
  21 import org.openhab.binding.lifx.internal.fields.HSBK;
  22 import org.openhab.core.library.types.DecimalType;
  23 import org.openhab.core.library.types.IncreaseDecreaseType;
  24 import org.openhab.core.library.types.PercentType;
  25 import org.openhab.core.library.types.QuantityType;
  26 import org.openhab.core.library.unit.Units;
  27 import org.openhab.core.types.Command;
  28
  29 /**
  30  * Utility class for sharing message utility methods between objects.
  31  *
  32  * @author Wouter Born - Initial contribution
  33  */
  34 @NonNullByDefault
  35 public final class LifxMessageUtil {
  36
  37     private static final BigDecimal INCREASE_DECREASE_STEP = new BigDecimal(10);
  38
  39     private static final BigDecimal ZERO = PercentType.ZERO.toBigDecimal();
  40     private static final BigDecimal HUNDRED = PercentType.HUNDRED.toBigDecimal();
  41
  42     private LifxMessageUtil() {
  43         // hidden utility class constructor
  44     }
  45
  46     public static PercentType increaseDecreasePercentType(IncreaseDecreaseType increaseDecreaseType, PercentType old) {
  47         BigDecimal delta = ZERO;
  48         if (increaseDecreaseType == IncreaseDecreaseType.INCREASE) {
  49             delta = INCREASE_DECREASE_STEP;
  50         } else if (increaseDecreaseType == IncreaseDecreaseType.DECREASE) {
  51             delta = INCREASE_DECREASE_STEP.negate();
  52         }
  53
  54         if (!ZERO.equals(delta)) {
  55             BigDecimal newValue = old.toBigDecimal().add(delta);
  56             newValue = newValue.setScale(0, RoundingMode.HALF_UP);
  57             newValue = newValue.min(HUNDRED);
  58             newValue = newValue.max(ZERO);
  59             return new PercentType(newValue);
  60         } else {
  61             return old;
  62         }
  63     }
  64
  65     private static PercentType intToPercentType(int i) {
  66         return new PercentType(Math.round((i / 65535.0f) * 100));
  67     }
  68
  69     private static int percentTypeToInt(PercentType percentType) {
  70         return (int) (percentType.floatValue() / 100 * 65535.0f);
  71     }
  72
  73     public static DecimalType hueToDecimalType(int hue) {
  74         return new DecimalType(hue * 360 / 65535.0f);
  75     }
  76
  77     public static int decimalTypeToHue(DecimalType hue) {
  78         return (int) (hue.floatValue() / 360 * 65535.0f);
  79     }
  80
  81     public static PercentType saturationToPercentType(int saturation) {
  82         return intToPercentType(saturation);
  83     }
  84
  85     public static int percentTypeToSaturation(PercentType saturation) {
  86         return percentTypeToInt(saturation);
  87     }
  88
  89     public static PercentType brightnessToPercentType(int brightness) {
  90         return intToPercentType(brightness);
  91     }
  92
  93     public static int percentTypeToBrightness(PercentType brightness) {
  94         return percentTypeToInt(brightness);
  95     }
  96
  97     public static PercentType kelvinToPercentType(int kelvin, TemperatureRange temperatureRange) {
  98         if (temperatureRange.getRange() == 0) {
  99             return PercentType.HUNDRED;
 100         }
 101         BigDecimal value = BigDecimal
 102                 .valueOf((kelvin - temperatureRange.getMaximum()) / (temperatureRange.getRange() / -100));
 103         value = value.min(HUNDRED);
 104         value = value.max(ZERO);
 105         return new PercentType(value);
 106     }
 107
 108     public static int commandToKelvin(Command temperature, TemperatureRange temperatureRange) {
 109         if (temperature instanceof PercentType percentValue) {
 110             return percentTypeToKelvin(percentValue, temperatureRange);
 111         } else if (temperature instanceof QuantityType quantityValue) {
 112             return quantityTypeToKelvin(quantityValue, temperatureRange);
 113         } else if (temperature instanceof DecimalType decimalValue) {
 114             return decimalTypeToKelvin(decimalValue, temperatureRange);
 115         } else {
 116             throw new IllegalStateException(
 117                     "Unexpected command type " + temperature.getClass().getName() + " for color temperature command.");
 118         }
 119     }
 120
 121     public static int decimalTypeToKelvin(DecimalType temperature, TemperatureRange temperatureRange) {
 122         return Math.round(Math.min(Math.max(temperature.intValue(), temperatureRange.getMinimum()),
 123                 temperatureRange.getMaximum()));
 124     }
 125
 126     public static int percentTypeToKelvin(PercentType temperature, TemperatureRange temperatureRange) {
 127         return Math.round(
 128                 temperatureRange.getMaximum() - (temperature.floatValue() * (temperatureRange.getRange() / 100)));
 129     }
 130
 131     public static int quantityTypeToKelvin(QuantityType temperature, TemperatureRange temperatureRange) {
 132         QuantityType<?> asKelvin = temperature.toInvertibleUnit(Units.KELVIN);
 133         if (asKelvin == null) {
 134             throw new IllegalStateException(
 135                     "Cannot convert color temperature " + temperature.toString() + " to Kelvin");
 136         }
 137
 138         return asKelvin.intValue();
 139     }
 140
 141     public static PercentType infraredToPercentType(int infrared) {
 142         return intToPercentType(infrared);
 143     }
 144
 145     public static int percentTypeToInfrared(PercentType infrared) {
 146         return percentTypeToInt(infrared);
 147     }
 148
 149     public static boolean sameColors(HSBK... colors) {
 150         if (colors.length <= 1) {
 151             return true;
 152         }
 153
 154         for (int i = 1; i < colors.length; i++) {
 155             if (!colors[0].equals(colors[i])) {
 156                 return false;
 157             }
 158         }
 159         return true;
 160     }
 161
 162     public static long randomSourceId() {
 163         return UUID.randomUUID().getLeastSignificantBits() & (-1L >>> 32);
 164     }
 165 }