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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.mqtt.homeassistant.internal.component;
  14
  15 import org.eclipse.jdt.annotation.NonNullByDefault;
  16 import org.eclipse.jdt.annotation.Nullable;
  17 import org.openhab.binding.mqtt.generic.values.OnOffValue;
  18 import org.openhab.binding.mqtt.homeassistant.internal.config.dto.AbstractChannelConfiguration;
  19 import org.openhab.binding.mqtt.homeassistant.internal.exception.ConfigurationException;
  20
  21 import com.google.gson.annotations.SerializedName;
  22
  23 /**
  24  * A MQTT switch, following the https://www.home-assistant.io/components/switch.mqtt/ specification.
  25  *
  26  * @author David Graeff - Initial contribution
  27  */
  28 @NonNullByDefault
  29 public class Switch extends AbstractComponent<Switch.ChannelConfiguration> {
  30     public static final String SWITCH_CHANNEL_ID = "switch"; // Randomly chosen channel "ID"
  31
  32     /**
  33      * Configuration class for MQTT component
  34      */
  35     static class ChannelConfiguration extends AbstractChannelConfiguration {
  36         ChannelConfiguration() {
  37             super("MQTT Switch");
  38         }
  39
  40         protected @Nullable Boolean optimistic;
  41
  42         @SerializedName("command_topic")
  43         protected @Nullable String commandTopic;
  44         @SerializedName("state_topic")
  45         protected String stateTopic = "";
  46
  47         @SerializedName("state_on")
  48         protected @Nullable String stateOn;
  49         @SerializedName("state_off")
  50         protected @Nullable String stateOff;
  51         @SerializedName("payload_on")
  52         protected String payloadOn = "ON";
  53         @SerializedName("payload_off")
  54         protected String payloadOff = "OFF";
  55
  56         @SerializedName("json_attributes_topic")
  57         protected @Nullable String jsonAttributesTopic;
  58         @SerializedName("json_attributes_template")
  59         protected @Nullable String jsonAttributesTemplate;
  60     }
  61
  62     public Switch(ComponentFactory.ComponentConfiguration componentConfiguration) {
  63         super(componentConfiguration, ChannelConfiguration.class);
  64
  65         boolean optimistic = channelConfiguration.optimistic != null ? channelConfiguration.optimistic
  66                 : channelConfiguration.stateTopic.isBlank();
  67
  68         if (optimistic && !channelConfiguration.stateTopic.isBlank()) {
  69             throw new ConfigurationException("Component:Switch does not support forced optimistic mode");
  70         }
  71
  72         String stateOn = channelConfiguration.stateOn != null ? channelConfiguration.stateOn
  73                 : channelConfiguration.payloadOn;
  74         String stateOff = channelConfiguration.stateOff != null ? channelConfiguration.stateOff
  75                 : channelConfiguration.payloadOff;
  76
  77         OnOffValue value = new OnOffValue(stateOn, stateOff, channelConfiguration.payloadOn,
  78                 channelConfiguration.payloadOff);
  79
  80         buildChannel(SWITCH_CHANNEL_ID, value, "state", componentConfiguration.getUpdateListener())
  81                 .stateTopic(channelConfiguration.stateTopic, channelConfiguration.getValueTemplate())
  82                 .commandTopic(channelConfiguration.commandTopic, channelConfiguration.isRetain(),
  83                         channelConfiguration.getQos())
  84                 .build();
  85     }
  86 }