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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
  14 package org.openhab.binding.mqtt.espmilighthub.internal;
  15
  16 import static org.openhab.binding.mqtt.espmilighthub.internal.EspMilightHubBindingConstants.*;
  17
  18 import java.math.BigDecimal;
  19 import java.util.Locale;
  20
  21 import org.eclipse.jdt.annotation.NonNullByDefault;
  22 import org.eclipse.jdt.annotation.Nullable;
  23 import org.openhab.core.thing.Channel;
  24 import org.openhab.core.thing.ThingRegistry;
  25 import org.openhab.core.thing.type.DynamicStateDescriptionProvider;
  26 import org.openhab.core.types.StateDescription;
  27 import org.openhab.core.types.StateDescriptionFragmentBuilder;
  28 import org.osgi.service.component.annotations.Activate;
  29 import org.osgi.service.component.annotations.Component;
  30 import org.osgi.service.component.annotations.Reference;
  31 import org.slf4j.LoggerFactory;
  32
  33 /**
  34  * Provides custom state descriptions for system.color-temperature-absolute channels.
  35  *
  36  * @author Cody Cutrer - Initial contribution
  37  */
  38 @Component(service = DynamicStateDescriptionProvider.class)
  39 @NonNullByDefault
  40 public class EspMilightStateDescriptionProvider implements DynamicStateDescriptionProvider {
  41     private final ThingRegistry thingRegistry;
  42
  43     @Activate
  44     public EspMilightStateDescriptionProvider(@Reference ThingRegistry thingRegistry) {
  45         this.thingRegistry = thingRegistry;
  46     }
  47
  48     @Override
  49     public @Nullable StateDescription getStateDescription(Channel channel, @Nullable StateDescription original,
  50             @Nullable Locale locale) {
  51         var logger = LoggerFactory.getLogger(EspMilightStateDescriptionProvider.class);
  52         var channelUID = channel.getUID();
  53         var thing = thingRegistry.get(channelUID.getThingUID());
  54         if (thing == null || !SUPPORTED_THING_TYPES.contains(thing.getThingTypeUID())
  55                 || !channelUID.getId().equals(CHANNEL_COLOURTEMP_ABS)) {
  56             return null;
  57         }
  58
  59         StateDescriptionFragmentBuilder builder;
  60         if (original != null) {
  61             builder = StateDescriptionFragmentBuilder.create(original);
  62         } else {
  63             builder = StateDescriptionFragmentBuilder.create();
  64         }
  65         builder.withMinimum(BIG_DECIMAL_153).withMaximum(BIG_DECIMAL_370).withStep(BigDecimal.ONE)
  66                 .withPattern("%d mired");
  67         return builder.build().toStateDescription();
  68     }
  69 }