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   1 /**
   2  * Copyright (c) 2010-2021 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
  27 import com.google.gson.annotations.SerializedName;
  28
  29 /**
  30  * A MQTT sensor, following the https://www.home-assistant.io/components/sensor.mqtt/ specification.
  31  *
  32  * @author David Graeff - Initial contribution
  33  */
  34 @NonNullByDefault
  35 public class Sensor extends AbstractComponent<Sensor.ChannelConfiguration> {
  36     public static final String SENSOR_CHANNEL_ID = "sensor"; // Randomly chosen channel "ID"
  37     private static final Pattern TRIGGER_ICONS = Pattern.compile("^mdi:(toggle|gesture).*$");
  38
  39     /**
  40      * Configuration class for MQTT component
  41      */
  42     static class ChannelConfiguration extends AbstractChannelConfiguration {
  43         ChannelConfiguration() {
  44             super("MQTT Sensor");
  45         }
  46
  47         @SerializedName("unit_of_measurement")
  48         protected @Nullable String unitOfMeasurement;
  49         @SerializedName("device_class")
  50         protected @Nullable String deviceClass;
  51         @SerializedName("force_update")
  52         protected boolean forceUpdate = false;
  53         @SerializedName("expire_after")
  54         protected @Nullable Integer expireAfter;
  55
  56         @SerializedName("state_topic")
  57         protected String stateTopic = "";
  58
  59         @SerializedName("json_attributes_topic")
  60         protected @Nullable String jsonAttributesTopic;
  61         @SerializedName("json_attributes_template")
  62         protected @Nullable String jsonAttributesTemplate;
  63         @SerializedName("json_attributes")
  64         protected @Nullable List<String> jsonAttributes;
  65     }
  66
  67     public Sensor(ComponentFactory.ComponentConfiguration componentConfiguration) {
  68         super(componentConfiguration, ChannelConfiguration.class);
  69
  70         Value value;
  71         String uom = channelConfiguration.unitOfMeasurement;
  72
  73         if (uom != null && !uom.isBlank()) {
  74             value = new NumberValue(null, null, null, uom);
  75         } else {
  76             value = new TextValue();
  77         }
  78
  79         String icon = channelConfiguration.getIcon();
  80
  81         boolean trigger = TRIGGER_ICONS.matcher(icon).matches();
  82
  83         buildChannel(SENSOR_CHANNEL_ID, value, channelConfiguration.getName(),
  84                 getListener(componentConfiguration, value))
  85                         .stateTopic(channelConfiguration.stateTopic, channelConfiguration.getValueTemplate())//
  86                         .trigger(trigger).build();
  87     }
  88
  89     private ChannelStateUpdateListener getListener(ComponentFactory.ComponentConfiguration componentConfiguration,
  90             Value value) {
  91         ChannelStateUpdateListener updateListener = componentConfiguration.getUpdateListener();
  92
  93         if (channelConfiguration.expireAfter != null) {
  94             updateListener = new ExpireUpdateStateListener(updateListener, channelConfiguration.expireAfter, value,
  95                     componentConfiguration.getTracker(), componentConfiguration.getScheduler());
  96         }
  97         return updateListener;
  98     }
  99 }