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   1 /**
   2  * Copyright (c) 2010-2020 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;
  14
  15 import java.util.List;
  16 import java.util.regex.Pattern;
  17
  18 import org.apache.commons.lang.StringUtils;
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.openhab.binding.mqtt.generic.ChannelStateUpdateListener;
  22 import org.openhab.binding.mqtt.generic.values.NumberValue;
  23 import org.openhab.binding.mqtt.generic.values.TextValue;
  24 import org.openhab.binding.mqtt.generic.values.Value;
  25 import org.openhab.binding.mqtt.homeassistant.internal.listener.ExpireUpdateStateListener;
  26
  27 /**
  28  * A MQTT sensor, following the https://www.home-assistant.io/components/sensor.mqtt/ specification.
  29  *
  30  * @author David Graeff - Initial contribution
  31  */
  32 @NonNullByDefault
  33 public class ComponentSensor extends AbstractComponent<ComponentSensor.ChannelConfiguration> {
  34     public static final String sensorChannelID = "sensor"; // Randomly chosen channel "ID"
  35     private static final Pattern triggerIcons = Pattern.compile("^mdi:(toggle|gesture).*$");
  36
  37     /**
  38      * Configuration class for MQTT component
  39      */
  40     static class ChannelConfiguration extends BaseChannelConfiguration {
  41         ChannelConfiguration() {
  42             super("MQTT Sensor");
  43         }
  44
  45         protected @Nullable String unit_of_measurement;
  46         protected @Nullable String device_class;
  47         protected boolean force_update = false;
  48         protected @Nullable Integer expire_after;
  49
  50         protected String state_topic = "";
  51
  52         protected @Nullable String json_attributes_topic;
  53         protected @Nullable String json_attributes_template;
  54         protected @Nullable List<String> json_attributes;
  55     }
  56
  57     public ComponentSensor(CFactory.ComponentConfiguration componentConfiguration) {
  58         super(componentConfiguration, ChannelConfiguration.class);
  59
  60         Value value;
  61
  62         String uom = channelConfiguration.unit_of_measurement;
  63
  64         if (uom != null && StringUtils.isNotBlank(uom)) {
  65             value = new NumberValue(null, null, null, uom);
  66         } else {
  67             value = new TextValue();
  68         }
  69
  70         String icon = channelConfiguration.icon;
  71
  72         boolean trigger = triggerIcons.matcher(icon).matches();
  73
  74         buildChannel(sensorChannelID, value, channelConfiguration.name, getListener(componentConfiguration, value))
  75                 .stateTopic(channelConfiguration.state_topic, channelConfiguration.value_template)//
  76                 .trigger(trigger).build();
  77     }
  78
  79     private ChannelStateUpdateListener getListener(CFactory.ComponentConfiguration componentConfiguration,
  80             Value value) {
  81         ChannelStateUpdateListener updateListener = componentConfiguration.getUpdateListener();
  82
  83         if (channelConfiguration.expire_after != null) {
  84             updateListener = new ExpireUpdateStateListener(updateListener, channelConfiguration.expire_after, value,
  85                     componentConfiguration.getTracker(), componentConfiguration.getScheduler());
  86         }
  87         return updateListener;
  88     }
  89 }