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