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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.mqtt.homeassistant.internal.component;
  14
  15 import java.util.List;
  16 import java.util.regex.Pattern;
  17
  18 import org.eclipse.jdt.annotation.NonNullByDefault;
  19 import org.eclipse.jdt.annotation.Nullable;
  20 import org.openhab.binding.mqtt.generic.ChannelStateUpdateListener;
  21 import org.openhab.binding.mqtt.generic.values.NumberValue;
  22 import org.openhab.binding.mqtt.generic.values.TextValue;
  23 import org.openhab.binding.mqtt.generic.values.Value;
  24 import org.openhab.binding.mqtt.homeassistant.internal.ComponentChannelType;
  25 import org.openhab.binding.mqtt.homeassistant.internal.config.dto.AbstractChannelConfiguration;
  26 import org.openhab.binding.mqtt.homeassistant.internal.listener.ExpireUpdateStateListener;
  27 import org.openhab.core.types.util.UnitUtils;
  28
  29 import com.google.gson.annotations.SerializedName;
  30
  31 /**
  32  * A MQTT sensor, following the https://www.home-assistant.io/components/sensor.mqtt/ specification.
  33  *
  34  * @author David Graeff - Initial contribution
  35  */
  36 @NonNullByDefault
  37 public class Sensor extends AbstractComponent<Sensor.ChannelConfiguration> {
  38     public static final String SENSOR_CHANNEL_ID = "sensor"; // Randomly chosen channel "ID"
  39     private static final Pattern TRIGGER_ICONS = Pattern.compile("^mdi:(toggle|gesture).*$");
  40
  41     /**
  42      * Configuration class for MQTT component
  43      */
  44     static class ChannelConfiguration extends AbstractChannelConfiguration {
  45         ChannelConfiguration() {
  46             super("MQTT Sensor");
  47         }
  48
  49         @SerializedName("unit_of_measurement")
  50         protected @Nullable String unitOfMeasurement;
  51         @SerializedName("device_class")
  52         protected @Nullable String deviceClass;
  53         @SerializedName("state_class")
  54         protected @Nullable String stateClass;
  55         @SerializedName("force_update")
  56         protected boolean forceUpdate = false;
  57         @SerializedName("expire_after")
  58         protected @Nullable Integer expireAfter;
  59
  60         @SerializedName("state_topic")
  61         protected String stateTopic = "";
  62
  63         @SerializedName("json_attributes_topic")
  64         protected @Nullable String jsonAttributesTopic;
  65         @SerializedName("json_attributes_template")
  66         protected @Nullable String jsonAttributesTemplate;
  67         @SerializedName("json_attributes")
  68         protected @Nullable List<String> jsonAttributes;
  69     }
  70
  71     public Sensor(ComponentFactory.ComponentConfiguration componentConfiguration, boolean newStyleChannels) {
  72         super(componentConfiguration, ChannelConfiguration.class, newStyleChannels);
  73
  74         Value value;
  75         String uom = channelConfiguration.unitOfMeasurement;
  76         String sc = channelConfiguration.stateClass;
  77         ComponentChannelType type;
  78
  79         if (uom != null && !uom.isBlank()) {
  80             value = new NumberValue(null, null, null, UnitUtils.parseUnit(uom));
  81             type = ComponentChannelType.NUMBER;
  82         } else if (sc != null && !sc.isBlank()) {
  83             // see state_class at https://developers.home-assistant.io/docs/core/entity/sensor#properties
  84             // > If not None, the sensor is assumed to be numerical
  85             value = new NumberValue(null, null, null, null);
  86             type = ComponentChannelType.NUMBER;
  87         } else {
  88             value = new TextValue();
  89             type = ComponentChannelType.STRING;
  90         }
  91
  92         String icon = channelConfiguration.getIcon();
  93
  94         boolean trigger = TRIGGER_ICONS.matcher(icon).matches();
  95
  96         buildChannel(SENSOR_CHANNEL_ID, type, value, getName(), getListener(componentConfiguration, value))
  97                 .stateTopic(channelConfiguration.stateTopic, channelConfiguration.getValueTemplate())//
  98                 .trigger(trigger).build();
  99         finalizeChannels();
 100     }
 101
 102     private ChannelStateUpdateListener getListener(ComponentFactory.ComponentConfiguration componentConfiguration,
 103             Value value) {
 104         ChannelStateUpdateListener updateListener = componentConfiguration.getUpdateListener();
 105
 106         if (channelConfiguration.expireAfter != null) {
 107             updateListener = new ExpireUpdateStateListener(updateListener, channelConfiguration.expireAfter, value,
 108                     componentConfiguration.getTracker(), componentConfiguration.getScheduler());
 109         }
 110         return updateListener;
 111     }
 112 }