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   1 /**
   2  * Copyright (c) 2010-2024 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.http.internal.converter;
  14
  15 import java.math.BigDecimal;
  16 import java.util.function.Consumer;
  17 import java.util.regex.Matcher;
  18 import java.util.regex.Pattern;
  19
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.eclipse.jdt.annotation.Nullable;
  22 import org.openhab.binding.http.internal.config.HttpChannelConfig;
  23 import org.openhab.binding.http.internal.transform.ValueTransformation;
  24 import org.openhab.core.library.types.HSBType;
  25 import org.openhab.core.library.types.PercentType;
  26 import org.openhab.core.types.Command;
  27 import org.openhab.core.types.State;
  28 import org.openhab.core.types.UnDefType;
  29
  30 /**
  31  * The {@link ColorItemConverter} implements {@link org.openhab.core.library.items.ColorItem} conversions
  32  *
  33  * @author Jan N. Klug - Initial contribution
  34  */
  35
  36 @NonNullByDefault
  37 public class ColorItemConverter extends AbstractTransformingItemConverter {
  38     private static final BigDecimal BYTE_FACTOR = BigDecimal.valueOf(2.55);
  39     private static final BigDecimal HUNDRED = BigDecimal.valueOf(100);
  40     private static final Pattern TRIPLE_MATCHER = Pattern.compile("(\\d+),(\\d+),(\\d+)");
  41
  42     private State state = UnDefType.UNDEF;
  43
  44     public ColorItemConverter(Consumer<State> updateState, Consumer<Command> postCommand,
  45             @Nullable Consumer<String> sendHttpValue, ValueTransformation stateTransformations,
  46             ValueTransformation commandTransformations, HttpChannelConfig channelConfig) {
  47         super(updateState, postCommand, sendHttpValue, stateTransformations, commandTransformations, channelConfig);
  48         this.channelConfig = channelConfig;
  49     }
  50
  51     @Override
  52     protected @Nullable Command toCommand(String value) {
  53         return null;
  54     }
  55
  56     @Override
  57     public String toString(Command command) {
  58         String string = channelConfig.commandToFixedValue(command);
  59         if (string != null) {
  60             return string;
  61         }
  62
  63         if (command instanceof HSBType newState) {
  64             state = newState;
  65             return hsbToString(newState);
  66         } else if (command instanceof PercentType percentCommand && state instanceof HSBType hsb) {
  67             HSBType newState = new HSBType(hsb.getHue(), hsb.getSaturation(), percentCommand);
  68             state = newState;
  69             return hsbToString(newState);
  70         }
  71
  72         throw new IllegalArgumentException("Command type '" + command.toString() + "' not supported");
  73     }
  74
  75     @Override
  76     public State toState(String string) {
  77         State newState = UnDefType.UNDEF;
  78         if (string.equals(channelConfig.onValue)) {
  79             if (state instanceof HSBType hsb) {
  80                 newState = new HSBType(hsb.getHue(), hsb.getSaturation(), PercentType.HUNDRED);
  81             } else {
  82                 newState = HSBType.WHITE;
  83             }
  84         } else if (string.equals(channelConfig.offValue)) {
  85             if (state instanceof HSBType hsb) {
  86                 newState = new HSBType(hsb.getHue(), hsb.getSaturation(), PercentType.ZERO);
  87             } else {
  88                 newState = HSBType.BLACK;
  89             }
  90         } else if (string.equals(channelConfig.increaseValue) && state instanceof HSBType hsb) {
  91             BigDecimal newBrightness = hsb.getBrightness().toBigDecimal().add(channelConfig.step);
  92             if (HUNDRED.compareTo(newBrightness) < 0) {
  93                 newBrightness = HUNDRED;
  94             }
  95             newState = new HSBType(hsb.getHue(), hsb.getSaturation(), new PercentType(newBrightness));
  96         } else if (string.equals(channelConfig.decreaseValue) && state instanceof HSBType hsb) {
  97             BigDecimal newBrightness = hsb.getBrightness().toBigDecimal().subtract(channelConfig.step);
  98             if (BigDecimal.ZERO.compareTo(newBrightness) > 0) {
  99                 newBrightness = BigDecimal.ZERO;
 100             }
 101             newState = new HSBType(hsb.getHue(), hsb.getSaturation(), new PercentType(newBrightness));
 102         } else {
 103             Matcher matcher = TRIPLE_MATCHER.matcher(string);
 104             if (matcher.matches()) {
 105                 switch (channelConfig.colorMode) {
 106                     case RGB:
 107                         int r = Integer.parseInt(matcher.group(1));
 108                         int g = Integer.parseInt(matcher.group(2));
 109                         int b = Integer.parseInt(matcher.group(3));
 110                         newState = HSBType.fromRGB(r, g, b);
 111                         break;
 112                     case HSB:
 113                         newState = new HSBType(string);
 114                         break;
 115                 }
 116             }
 117         }
 118
 119         state = newState;
 120         return newState;
 121     }
 122
 123     private String hsbToString(HSBType state) {
 124         switch (channelConfig.colorMode) {
 125             case RGB:
 126                 PercentType[] rgb = state.toRGB();
 127                 return String.format("%1$d,%2$d,%3$d", rgb[0].toBigDecimal().multiply(BYTE_FACTOR).intValue(),
 128                         rgb[1].toBigDecimal().multiply(BYTE_FACTOR).intValue(),
 129                         rgb[2].toBigDecimal().multiply(BYTE_FACTOR).intValue());
 130             case HSB:
 131                 return state.toString();
 132         }
 133         throw new IllegalStateException("Invalid colorMode setting");
 134     }
 135
 136     public enum ColorMode {
 137         RGB,
 138         HSB
 139     }
 140 }