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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.openweathermap.internal.handler;
  14
  15 import static org.openhab.binding.openweathermap.internal.OpenWeatherMapBindingConstants.*;
  16
  17 import java.util.ArrayList;
  18 import java.util.List;
  19 import java.util.regex.Matcher;
  20 import java.util.regex.Pattern;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.eclipse.jdt.annotation.Nullable;
  24 import org.openhab.binding.openweathermap.internal.config.OpenWeatherMapUVIndexConfiguration;
  25 import org.openhab.binding.openweathermap.internal.connection.OpenWeatherMapCommunicationException;
  26 import org.openhab.binding.openweathermap.internal.connection.OpenWeatherMapConfigurationException;
  27 import org.openhab.binding.openweathermap.internal.connection.OpenWeatherMapConnection;
  28 import org.openhab.binding.openweathermap.internal.dto.OpenWeatherMapJsonUVIndexData;
  29 import org.openhab.core.i18n.TimeZoneProvider;
  30 import org.openhab.core.thing.Channel;
  31 import org.openhab.core.thing.ChannelUID;
  32 import org.openhab.core.thing.Thing;
  33 import org.openhab.core.thing.ThingStatus;
  34 import org.openhab.core.thing.ThingStatusDetail;
  35 import org.openhab.core.thing.binding.builder.ThingBuilder;
  36 import org.openhab.core.types.State;
  37 import org.openhab.core.types.UnDefType;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 import com.google.gson.JsonSyntaxException;
  42
  43 /**
  44  * The {@link OpenWeatherMapUVIndexHandler} is responsible for handling commands, which are sent to one of the
  45  * channels.
  46  *
  47  * @author Christoph Weitkamp - Initial contribution
  48  */
  49 @NonNullByDefault
  50 public class OpenWeatherMapUVIndexHandler extends AbstractOpenWeatherMapHandler {
  51
  52     private final Logger logger = LoggerFactory.getLogger(OpenWeatherMapUVIndexHandler.class);
  53
  54     private static final String CHANNEL_GROUP_FORECAST_PREFIX = "forecastDay";
  55     private static final Pattern CHANNEL_GROUP_FORECAST_PREFIX_PATTERN = Pattern
  56             .compile(CHANNEL_GROUP_FORECAST_PREFIX + "([0-9]*)");
  57
  58     // keeps track of the parsed count
  59     private int forecastDays = 6;
  60
  61     private @Nullable OpenWeatherMapJsonUVIndexData uvindexData;
  62     private @Nullable List<OpenWeatherMapJsonUVIndexData> uvindexForecastData;
  63
  64     public OpenWeatherMapUVIndexHandler(Thing thing, final TimeZoneProvider timeZoneProvider) {
  65         super(thing, timeZoneProvider);
  66     }
  67
  68     @Override
  69     public void initialize() {
  70         super.initialize();
  71         logger.debug("Initialize OpenWeatherMapUVIndexHandler handler '{}'.", getThing().getUID());
  72         OpenWeatherMapUVIndexConfiguration config = getConfigAs(OpenWeatherMapUVIndexConfiguration.class);
  73
  74         boolean configValid = true;
  75         int newForecastDays = config.forecastDays;
  76         if (newForecastDays < 1 || newForecastDays > 8) {
  77             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
  78                     "@text/offline.conf-error-not-supported-uvindex-number-of-days");
  79             configValid = false;
  80         }
  81
  82         if (configValid) {
  83             logger.debug("Rebuilding thing '{}'.", getThing().getUID());
  84             List<Channel> toBeAddedChannels = new ArrayList<>();
  85             List<Channel> toBeRemovedChannels = new ArrayList<>();
  86             if (forecastDays != newForecastDays) {
  87                 logger.debug("Rebuilding UV index channel groups.");
  88                 if (forecastDays > newForecastDays) {
  89                     if (newForecastDays < 2) {
  90                         toBeRemovedChannels.addAll(removeChannelsOfGroup(CHANNEL_GROUP_FORECAST_TOMORROW));
  91                     }
  92                     for (int i = newForecastDays; i < forecastDays; ++i) {
  93                         toBeRemovedChannels
  94                                 .addAll(removeChannelsOfGroup(CHANNEL_GROUP_FORECAST_PREFIX + Integer.toString(i)));
  95                     }
  96                 } else {
  97                     if (forecastDays <= 1 && newForecastDays > 1) {
  98                         toBeAddedChannels.addAll(
  99                                 createChannelsForGroup(CHANNEL_GROUP_FORECAST_TOMORROW, CHANNEL_GROUP_TYPE_UVINDEX));
 100                     }
 101                     for (int i = (forecastDays < 2) ? 2 : forecastDays; i < newForecastDays; ++i) {
 102                         toBeAddedChannels.addAll(createChannelsForGroup(
 103                                 CHANNEL_GROUP_FORECAST_PREFIX + Integer.toString(i), CHANNEL_GROUP_TYPE_UVINDEX));
 104                     }
 105                 }
 106                 forecastDays = newForecastDays;
 107             }
 108             ThingBuilder builder = editThing().withoutChannels(toBeRemovedChannels);
 109             for (Channel channel : toBeAddedChannels) {
 110                 builder.withChannel(channel);
 111             }
 112             updateThing(builder.build());
 113         }
 114     }
 115
 116     @Override
 117     protected boolean requestData(OpenWeatherMapConnection connection)
 118             throws OpenWeatherMapCommunicationException, OpenWeatherMapConfigurationException {
 119         logger.debug("Update UV Index data of thing '{}'.", getThing().getUID());
 120         try {
 121             uvindexData = connection.getUVIndexData(location);
 122             if (forecastDays > 0) {
 123                 uvindexForecastData = connection.getUVIndexForecastData(location, forecastDays);
 124             }
 125             return true;
 126         } catch (JsonSyntaxException e) {
 127             logger.debug("JsonSyntaxException occurred during execution: {}", e.getLocalizedMessage(), e);
 128             return false;
 129         }
 130     }
 131
 132     @Override
 133     protected void updateChannel(ChannelUID channelUID) {
 134         switch (channelUID.getGroupId()) {
 135             case CHANNEL_GROUP_CURRENT_UVINDEX:
 136                 updateUVIndexChannel(channelUID);
 137                 break;
 138             case CHANNEL_GROUP_FORECAST_TOMORROW:
 139                 updateUVIndexForecastChannel(channelUID, 1);
 140                 break;
 141             default:
 142                 Matcher m = CHANNEL_GROUP_FORECAST_PREFIX_PATTERN.matcher(channelUID.getGroupId());
 143                 int i;
 144                 if (m.find() && (i = Integer.parseInt(m.group(1))) > 1 && i <= 8) {
 145                     updateUVIndexForecastChannel(channelUID, i);
 146                 }
 147                 break;
 148         }
 149     }
 150
 151     /**
 152      * Update the channel from the last OpenWeatherMap data retrieved.
 153      *
 154      * @param channelUID the id identifying the channel to be updated
 155      */
 156     private void updateUVIndexChannel(ChannelUID channelUID) {
 157         String channelId = channelUID.getIdWithoutGroup();
 158         String channelGroupId = channelUID.getGroupId();
 159         OpenWeatherMapJsonUVIndexData localUVIndexData = uvindexData;
 160         if (localUVIndexData != null) {
 161             State state = UnDefType.UNDEF;
 162             switch (channelId) {
 163                 case CHANNEL_TIME_STAMP:
 164                     state = getDateTimeTypeState(localUVIndexData.getDate());
 165                     break;
 166                 case CHANNEL_UVINDEX:
 167                     state = getDecimalTypeState(localUVIndexData.getValue());
 168                     break;
 169             }
 170             logger.debug("Update channel '{}' of group '{}' with new state '{}'.", channelId, channelGroupId, state);
 171             updateState(channelUID, state);
 172         } else {
 173             logger.debug("No UV Index data available to update channel '{}' of group '{}'.", channelId, channelGroupId);
 174         }
 175     }
 176
 177     /**
 178      * Update the channel from the last OpenWeatherMap data retrieved.
 179      *
 180      * @param channelUID the id identifying the channel to be updated
 181      * @param count
 182      */
 183     private void updateUVIndexForecastChannel(ChannelUID channelUID, int count) {
 184         String channelId = channelUID.getIdWithoutGroup();
 185         String channelGroupId = channelUID.getGroupId();
 186         List<OpenWeatherMapJsonUVIndexData> localUVIndexForecastData = uvindexForecastData;
 187         if (localUVIndexForecastData != null && localUVIndexForecastData.size() >= count) {
 188             OpenWeatherMapJsonUVIndexData forecastData = localUVIndexForecastData.get(count - 1);
 189             State state = UnDefType.UNDEF;
 190             switch (channelId) {
 191                 case CHANNEL_TIME_STAMP:
 192                     state = getDateTimeTypeState(forecastData.getDate());
 193                     break;
 194                 case CHANNEL_UVINDEX:
 195                     state = getDecimalTypeState(forecastData.getValue());
 196                     break;
 197             }
 198             logger.debug("Update channel '{}' of group '{}' with new state '{}'.", channelId, channelGroupId, state);
 199             updateState(channelUID, state);
 200         } else {
 201             logger.debug("No UV Index data available to update channel '{}' of group '{}'.", channelId, channelGroupId);
 202         }
 203     }
 204 }