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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
  18 import org.eclipse.jdt.annotation.NonNullByDefault;
  19 import org.eclipse.jdt.annotation.Nullable;
  20 import org.openhab.binding.http.internal.config.HttpChannelConfig;
  21 import org.openhab.binding.http.internal.transform.ValueTransformation;
  22 import org.openhab.core.library.types.PercentType;
  23 import org.openhab.core.types.Command;
  24 import org.openhab.core.types.State;
  25 import org.openhab.core.types.UnDefType;
  26
  27 /**
  28  * The {@link DimmerItemConverter} implements {@link org.openhab.core.library.items.DimmerItem} conversions
  29  *
  30  * @author Jan N. Klug - Initial contribution
  31  */
  32
  33 @NonNullByDefault
  34 public class DimmerItemConverter extends AbstractTransformingItemConverter {
  35     private static final BigDecimal HUNDRED = BigDecimal.valueOf(100);
  36
  37     private State state = UnDefType.UNDEF;
  38
  39     public DimmerItemConverter(Consumer<State> updateState, Consumer<Command> postCommand,
  40             @Nullable Consumer<String> sendHttpValue, ValueTransformation stateTransformations,
  41             ValueTransformation commandTransformations, HttpChannelConfig channelConfig) {
  42         super(updateState, postCommand, sendHttpValue, stateTransformations, commandTransformations, channelConfig);
  43         this.channelConfig = channelConfig;
  44     }
  45
  46     @Override
  47     protected @Nullable Command toCommand(String value) {
  48         return null;
  49     }
  50
  51     @Override
  52     public String toString(Command command) {
  53         String string = channelConfig.commandToFixedValue(command);
  54         if (string != null) {
  55             return string;
  56         }
  57
  58         if (command instanceof PercentType) {
  59             return ((PercentType) command).toString();
  60         }
  61
  62         throw new IllegalArgumentException("Command type '" + command.toString() + "' not supported");
  63     }
  64
  65     @Override
  66     public State toState(String string) {
  67         State newState = UnDefType.UNDEF;
  68
  69         if (string.equals(channelConfig.onValue)) {
  70             newState = PercentType.HUNDRED;
  71         } else if (string.equals(channelConfig.offValue)) {
  72             newState = PercentType.ZERO;
  73         } else if (string.equals(channelConfig.increaseValue) && state instanceof PercentType) {
  74             BigDecimal newBrightness = ((PercentType) state).toBigDecimal().add(channelConfig.step);
  75             if (HUNDRED.compareTo(newBrightness) < 0) {
  76                 newBrightness = HUNDRED;
  77             }
  78             newState = new PercentType(newBrightness);
  79         } else if (string.equals(channelConfig.decreaseValue) && state instanceof PercentType) {
  80             BigDecimal newBrightness = ((PercentType) state).toBigDecimal().subtract(channelConfig.step);
  81             if (BigDecimal.ZERO.compareTo(newBrightness) > 0) {
  82                 newBrightness = BigDecimal.ZERO;
  83             }
  84             newState = new PercentType(newBrightness);
  85         } else {
  86             try {
  87                 BigDecimal value = new BigDecimal(string);
  88                 if (value.compareTo(PercentType.HUNDRED.toBigDecimal()) > 0) {
  89                     value = PercentType.HUNDRED.toBigDecimal();
  90                 }
  91                 if (value.compareTo(PercentType.ZERO.toBigDecimal()) < 0) {
  92                     value = PercentType.ZERO.toBigDecimal();
  93                 }
  94                 newState = new PercentType(value);
  95             } catch (IllegalArgumentException e) {
  96                 // ignore
  97             }
  98         }
  99
 100         state = newState;
 101         return newState;
 102     }
 103 }