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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.meteoalerte.internal.handler;
  14
  15 import static org.openhab.binding.meteoalerte.internal.MeteoAlerteBindingConstants.*;
  16
  17 import java.io.IOException;
  18 import java.io.InputStream;
  19 import java.net.MalformedURLException;
  20 import java.nio.charset.StandardCharsets;
  21 import java.time.ZonedDateTime;
  22 import java.util.AbstractMap;
  23 import java.util.Map;
  24 import java.util.Objects;
  25 import java.util.concurrent.ScheduledFuture;
  26 import java.util.concurrent.TimeUnit;
  27
  28 import org.eclipse.jdt.annotation.NonNullByDefault;
  29 import org.eclipse.jdt.annotation.Nullable;
  30 import org.openhab.binding.meteoalerte.internal.MeteoAlerteConfiguration;
  31 import org.openhab.binding.meteoalerte.internal.json.ApiResponse;
  32 import org.openhab.binding.meteoalerte.internal.json.ResponseFieldDTO.AlertLevel;
  33 import org.openhab.core.io.net.http.HttpUtil;
  34 import org.openhab.core.library.types.DateTimeType;
  35 import org.openhab.core.library.types.DecimalType;
  36 import org.openhab.core.library.types.RawType;
  37 import org.openhab.core.library.types.StringType;
  38 import org.openhab.core.thing.ChannelUID;
  39 import org.openhab.core.thing.Thing;
  40 import org.openhab.core.thing.ThingStatus;
  41 import org.openhab.core.thing.ThingStatusDetail;
  42 import org.openhab.core.thing.binding.BaseThingHandler;
  43 import org.openhab.core.types.Command;
  44 import org.openhab.core.types.RefreshType;
  45 import org.openhab.core.types.State;
  46 import org.openhab.core.types.UnDefType;
  47 import org.slf4j.Logger;
  48 import org.slf4j.LoggerFactory;
  49
  50 import com.google.gson.Gson;
  51
  52 /**
  53  * The {@link MeteoAlerteHandler} is responsible for updating channels
  54  * and querying the API
  55  *
  56  * @author Gaël L'hopital - Initial contribution
  57  */
  58 @NonNullByDefault
  59 public class MeteoAlerteHandler extends BaseThingHandler {
  60     private static final String URL = "https://public.opendatasoft.com/api/records/1.0/search/?dataset=risques-meteorologiques-copy&"
  61             + "facet=etat_vent&facet=etat_pluie_inondation&facet=etat_orage&facet=etat_inondation&facet=etat_neige&facet=etat_canicule&"
  62             + "facet=etat_grand_froid&facet=etat_avalanches&refine.nom_dept=%s";
  63     private static final int TIMEOUT_MS = 30000;
  64     private static final String UNKNOWN_COLOR = "b3b3b3";
  65     private static final Map<AlertLevel, String> ALERT_COLORS = Map.ofEntries(
  66             new AbstractMap.SimpleEntry<AlertLevel, String>(AlertLevel.GREEN, "00ff00"),
  67             new AbstractMap.SimpleEntry<AlertLevel, String>(AlertLevel.YELLOW, "ffff00"),
  68             new AbstractMap.SimpleEntry<AlertLevel, String>(AlertLevel.ORANGE, "ff6600"),
  69             new AbstractMap.SimpleEntry<AlertLevel, String>(AlertLevel.RED, "ff0000"),
  70             new AbstractMap.SimpleEntry<AlertLevel, String>(AlertLevel.UNKNOWN, UNKNOWN_COLOR));
  71
  72     private final Logger logger = LoggerFactory.getLogger(MeteoAlerteHandler.class);
  73     // Time zone provider representing time zone configured in openHAB configuration
  74     private final Gson gson;
  75     private @Nullable ScheduledFuture<?> refreshJob;
  76     private String queryUrl = "";
  77
  78     public MeteoAlerteHandler(Thing thing, Gson gson) {
  79         super(thing);
  80         this.gson = gson;
  81     }
  82
  83     @Override
  84     public void initialize() {
  85         logger.debug("Initializing Météo Alerte handler.");
  86
  87         MeteoAlerteConfiguration config = getConfigAs(MeteoAlerteConfiguration.class);
  88         logger.debug("config department = {}", config.department);
  89         logger.debug("config refresh = {}", config.refresh);
  90
  91         updateStatus(ThingStatus.UNKNOWN);
  92         queryUrl = String.format(URL, config.department);
  93         refreshJob = scheduler.scheduleWithFixedDelay(this::updateAndPublish, 0, config.refresh, TimeUnit.MINUTES);
  94     }
  95
  96     @Override
  97     public void dispose() {
  98         logger.debug("Disposing the Météo Alerte handler.");
  99         ScheduledFuture<?> refreshJob = this.refreshJob;
 100         if (refreshJob != null) {
 101             refreshJob.cancel(true);
 102         }
 103         this.refreshJob = null;
 104     }
 105
 106     @Override
 107     public void handleCommand(ChannelUID channelUID, Command command) {
 108         if (command instanceof RefreshType) {
 109             updateAndPublish();
 110         }
 111     }
 112
 113     private void updateAndPublish() {
 114         try {
 115             if (queryUrl.isEmpty()) {
 116                 throw new MalformedURLException("queryUrl not initialized");
 117             }
 118             String response = HttpUtil.executeUrl("GET", queryUrl, TIMEOUT_MS);
 119             if (response == null) {
 120                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "empty response");
 121                 return;
 122             }
 123             updateStatus(ThingStatus.ONLINE);
 124             ApiResponse apiResponse = gson.fromJson(response, ApiResponse.class);
 125             updateChannels(Objects.requireNonNull(apiResponse));
 126         } catch (MalformedURLException e) {
 127             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 128                     String.format("Querying '%s' raised : %s", queryUrl, e.getMessage()));
 129         } catch (IOException e) {
 130             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 131         }
 132     }
 133
 134     /**
 135      * Update the channel from the last Meteo Alerte data retrieved
 136      *
 137      * @param channelId the id identifying the channel to be updated
 138      */
 139     private void updateChannels(ApiResponse apiResponse) {
 140         apiResponse.getRecords().findFirst().ifPresent((record) -> record.getResponseFieldDTO().ifPresent(fields -> {
 141             updateAlert(WIND, fields.getVent());
 142             updateAlert(RAIN, fields.getPluieInondation());
 143             updateAlert(STORM, fields.getOrage());
 144             updateAlert(FLOOD, fields.getInondation());
 145             updateAlert(SNOW, fields.getNeige());
 146             updateAlert(HEAT, fields.getCanicule());
 147             updateAlert(FREEZE, fields.getGrandFroid());
 148             updateAlert(AVALANCHE, fields.getAvalanches());
 149             updateAlert(WAVE, fields.getVagueSubmersion());
 150             updateState(COMMENT, new StringType(fields.getVigilanceComment()));
 151             fields.getDateInsert().ifPresent(date -> updateDate(OBSERVATION_TIME, date));
 152             fields.getDatePrevue().ifPresent(date -> updateDate(END_TIME, date));
 153         }));
 154     }
 155
 156     public byte @Nullable [] getResource(String iconPath) {
 157         ClassLoader classLoader = MeteoAlerteHandler.class.getClassLoader();
 158         if (classLoader != null) {
 159             try (InputStream stream = classLoader.getResourceAsStream(iconPath)) {
 160                 return stream != null ? stream.readAllBytes() : null;
 161             } catch (IOException e) {
 162                 logger.warn("Unable to load ressource '{}' : {}", iconPath, e.getMessage());
 163             }
 164         }
 165         return null;
 166     }
 167
 168     public void updateAlert(String channelId, AlertLevel value) {
 169         String channelIcon = channelId + "-icon";
 170         if (isLinked(channelId)) {
 171             updateState(channelId, getAlertLevel(value));
 172         }
 173         if (isLinked(channelIcon)) {
 174             State result = UnDefType.UNDEF;
 175             byte[] bytes = getResource(String.format("picto/%s.svg", channelId));
 176             if (bytes != null) {
 177                 String resource = new String(bytes, StandardCharsets.UTF_8);
 178                 resource = resource.replaceAll(UNKNOWN_COLOR, ALERT_COLORS.getOrDefault(value, UNKNOWN_COLOR));
 179                 result = new RawType(resource.getBytes(StandardCharsets.UTF_8), "image/svg+xml");
 180             }
 181             updateState(channelIcon, result);
 182         }
 183     }
 184
 185     public void updateDate(String channelId, ZonedDateTime zonedDateTime) {
 186         if (isLinked(channelId)) {
 187             updateState(channelId, new DateTimeType(zonedDateTime));
 188         }
 189     }
 190
 191     public State getAlertLevel(AlertLevel alert) {
 192         switch (alert) {
 193             case GREEN:
 194                 return DecimalType.ZERO;
 195             case YELLOW:
 196                 return new DecimalType(1);
 197             case ORANGE:
 198                 return new DecimalType(2);
 199             case RED:
 200                 return new DecimalType(3);
 201             default:
 202                 return UnDefType.UNDEF;
 203         }
 204     }
 205 }