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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.mystrom.internal;
  14
  15 import static org.openhab.binding.mystrom.internal.MyStromBindingConstants.CHANNEL_ENERGY_CONSUMED_SINCE_LAST_CALL;
  16 import static org.openhab.binding.mystrom.internal.MyStromBindingConstants.CHANNEL_POWER;
  17 import static org.openhab.binding.mystrom.internal.MyStromBindingConstants.CHANNEL_SWITCH;
  18 import static org.openhab.binding.mystrom.internal.MyStromBindingConstants.CHANNEL_TEMPERATURE;
  19 import static org.openhab.core.library.unit.SIUnits.CELSIUS;
  20 import static org.openhab.core.library.unit.Units.WATT;
  21 import static org.openhab.core.library.unit.Units.WATT_SECOND;
  22
  23 import java.time.Duration;
  24 import java.util.concurrent.TimeUnit;
  25
  26 import org.eclipse.jdt.annotation.NonNullByDefault;
  27 import org.eclipse.jdt.annotation.Nullable;
  28 import org.eclipse.jetty.client.HttpClient;
  29 import org.eclipse.jetty.http.HttpMethod;
  30 import org.openhab.core.cache.ExpiringCache;
  31 import org.openhab.core.library.types.OnOffType;
  32 import org.openhab.core.library.types.QuantityType;
  33 import org.openhab.core.thing.ChannelUID;
  34 import org.openhab.core.thing.Thing;
  35 import org.openhab.core.thing.ThingStatus;
  36 import org.openhab.core.thing.ThingStatusDetail;
  37 import org.openhab.core.types.Command;
  38 import org.openhab.core.types.RefreshType;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41
  42 /**
  43  * The {@link MyStromPlugHandler} is responsible for handling commands, which are
  44  * sent to one of the channels.
  45  *
  46  * @author Paul Frank - Initial contribution
  47  * @author Frederic Chastagnol - Extends from new abstract class
  48  */
  49 @NonNullByDefault
  50 public class MyStromPlugHandler extends AbstractMyStromHandler {
  51
  52     private static class MyStromReport {
  53
  54         public float power;
  55         public float Ws;
  56         public boolean relay;
  57         public float temperature;
  58     }
  59
  60     private final Logger logger = LoggerFactory.getLogger(MyStromPlugHandler.class);
  61
  62     private final ExpiringCache<MyStromReport> cache = new ExpiringCache<>(Duration.ofSeconds(3), this::getReport);
  63
  64     public MyStromPlugHandler(Thing thing, HttpClient httpClient) {
  65         super(thing, httpClient);
  66     }
  67
  68     @Override
  69     public void handleCommand(ChannelUID channelUID, Command command) {
  70         try {
  71             if (command instanceof RefreshType) {
  72                 pollDevice();
  73             } else {
  74                 if (command instanceof OnOffType && CHANNEL_SWITCH.equals(channelUID.getId())) {
  75                     sendHttpRequest(HttpMethod.GET, "/relay?state=" + (command == OnOffType.ON ? "1" : "0"), null);
  76                     scheduler.schedule(this::pollDevice, 500, TimeUnit.MILLISECONDS);
  77                 }
  78             }
  79         } catch (MyStromException e) {
  80             logger.warn("Error while handling command {}", e.getMessage());
  81         }
  82     }
  83
  84     private @Nullable MyStromReport getReport() {
  85         try {
  86             String returnContent = sendHttpRequest(HttpMethod.GET, "/report", null);
  87             MyStromReport report = gson.fromJson(returnContent, MyStromReport.class);
  88             updateStatus(ThingStatus.ONLINE);
  89             return report;
  90         } catch (MyStromException e) {
  91             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, e.getMessage());
  92             return null;
  93         }
  94     }
  95
  96     @Override
  97     protected void pollDevice() {
  98         MyStromReport report = cache.getValue();
  99         if (report != null) {
 100             updateState(CHANNEL_SWITCH, report.relay ? OnOffType.ON : OnOffType.OFF);
 101             updateState(CHANNEL_POWER, QuantityType.valueOf(report.power, WATT));
 102             updateState(CHANNEL_ENERGY_CONSUMED_SINCE_LAST_CALL, QuantityType.valueOf(report.Ws, WATT_SECOND));
 103             updateState(CHANNEL_TEMPERATURE, QuantityType.valueOf(report.temperature, CELSIUS));
 104         }
 105     }
 106 }