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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.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) {
  64             HSBType newState = (HSBType) command;
  65             state = newState;
  66             return hsbToString(newState);
  67         } else if (command instanceof PercentType && state instanceof HSBType) {
  68             HSBType newState = new HSBType(((HSBType) state).getBrightness(), ((HSBType) state).getSaturation(),
  69                     (PercentType) command);
  70             state = newState;
  71             return hsbToString(newState);
  72         }
  73
  74         throw new IllegalArgumentException("Command type '" + command.toString() + "' not supported");
  75     }
  76
  77     @Override
  78     public State toState(String string) {
  79         State newState = UnDefType.UNDEF;
  80         if (string.equals(channelConfig.onValue)) {
  81             if (state instanceof HSBType) {
  82                 newState = new HSBType(((HSBType) state).getHue(), ((HSBType) state).getSaturation(),
  83                         PercentType.HUNDRED);
  84             } else {
  85                 newState = HSBType.WHITE;
  86             }
  87         } else if (string.equals(channelConfig.offValue)) {
  88             if (state instanceof HSBType) {
  89                 newState = new HSBType(((HSBType) state).getHue(), ((HSBType) state).getSaturation(), PercentType.ZERO);
  90             } else {
  91                 newState = HSBType.BLACK;
  92             }
  93         } else if (string.equals(channelConfig.increaseValue) && state instanceof HSBType) {
  94             BigDecimal newBrightness = ((HSBType) state).getBrightness().toBigDecimal().add(channelConfig.step);
  95             if (HUNDRED.compareTo(newBrightness) < 0) {
  96                 newBrightness = HUNDRED;
  97             }
  98             newState = new HSBType(((HSBType) state).getHue(), ((HSBType) state).getSaturation(),
  99                     new PercentType(newBrightness));
 100         } else if (string.equals(channelConfig.decreaseValue) && state instanceof HSBType) {
 101             BigDecimal newBrightness = ((HSBType) state).getBrightness().toBigDecimal().subtract(channelConfig.step);
 102             if (BigDecimal.ZERO.compareTo(newBrightness) > 0) {
 103                 newBrightness = BigDecimal.ZERO;
 104             }
 105             newState = new HSBType(((HSBType) state).getHue(), ((HSBType) state).getSaturation(),
 106                     new PercentType(newBrightness));
 107         } else {
 108             Matcher matcher = TRIPLE_MATCHER.matcher(string);
 109             if (matcher.matches()) {
 110                 switch (channelConfig.colorMode) {
 111                     case RGB:
 112                         int r = Integer.parseInt(matcher.group(1));
 113                         int g = Integer.parseInt(matcher.group(2));
 114                         int b = Integer.parseInt(matcher.group(3));
 115                         newState = HSBType.fromRGB(r, g, b);
 116                         break;
 117                     case HSB:
 118                         newState = new HSBType(string);
 119                         break;
 120                 }
 121             }
 122         }
 123
 124         state = newState;
 125         return newState;
 126     }
 127
 128     private String hsbToString(HSBType state) {
 129         switch (channelConfig.colorMode) {
 130             case RGB:
 131                 PercentType[] rgb = state.toRGB();
 132                 return String.format("%1$d,%2$d,%3$d", rgb[0].toBigDecimal().multiply(BYTE_FACTOR).intValue(),
 133                         rgb[1].toBigDecimal().multiply(BYTE_FACTOR).intValue(),
 134                         rgb[2].toBigDecimal().multiply(BYTE_FACTOR).intValue());
 135             case HSB:
 136                 return state.toString();
 137         }
 138         throw new IllegalStateException("Invalid colorMode setting");
 139     }
 140
 141     public enum ColorMode {
 142         RGB,
 143         HSB
 144     }
 145 }