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   1 /**
   2  * Copyright (c) 2010-2022 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.synopanalyzer.internal.handler;
  14
  15 import static org.openhab.binding.synopanalyzer.internal.SynopAnalyzerBindingConstants.*;
  16
  17 import java.io.IOException;
  18 import java.time.ZoneOffset;
  19 import java.time.ZonedDateTime;
  20 import java.time.format.DateTimeFormatter;
  21 import java.util.ArrayList;
  22 import java.util.Arrays;
  23 import java.util.HashMap;
  24 import java.util.List;
  25 import java.util.Map;
  26 import java.util.Optional;
  27 import java.util.concurrent.ScheduledFuture;
  28 import java.util.concurrent.TimeUnit;
  29
  30 import javax.measure.quantity.Speed;
  31 import javax.ws.rs.HttpMethod;
  32
  33 import org.eclipse.jdt.annotation.NonNullByDefault;
  34 import org.eclipse.jdt.annotation.Nullable;
  35 import org.openhab.binding.synopanalyzer.internal.config.SynopAnalyzerConfiguration;
  36 import org.openhab.binding.synopanalyzer.internal.stationdb.Station;
  37 import org.openhab.binding.synopanalyzer.internal.synop.Overcast;
  38 import org.openhab.binding.synopanalyzer.internal.synop.Synop;
  39 import org.openhab.binding.synopanalyzer.internal.synop.SynopLand;
  40 import org.openhab.binding.synopanalyzer.internal.synop.SynopMobile;
  41 import org.openhab.binding.synopanalyzer.internal.synop.SynopShip;
  42 import org.openhab.binding.synopanalyzer.internal.synop.WindDirections;
  43 import org.openhab.core.i18n.LocationProvider;
  44 import org.openhab.core.io.net.http.HttpUtil;
  45 import org.openhab.core.library.types.DateTimeType;
  46 import org.openhab.core.library.types.DecimalType;
  47 import org.openhab.core.library.types.PointType;
  48 import org.openhab.core.library.types.QuantityType;
  49 import org.openhab.core.library.types.StringType;
  50 import org.openhab.core.library.unit.SIUnits;
  51 import org.openhab.core.thing.ChannelUID;
  52 import org.openhab.core.thing.Thing;
  53 import org.openhab.core.thing.ThingStatus;
  54 import org.openhab.core.thing.ThingStatusDetail;
  55 import org.openhab.core.thing.binding.BaseThingHandler;
  56 import org.openhab.core.types.Command;
  57 import org.openhab.core.types.RefreshType;
  58 import org.openhab.core.types.State;
  59 import org.openhab.core.types.UnDefType;
  60 import org.slf4j.Logger;
  61 import org.slf4j.LoggerFactory;
  62
  63 /**
  64  * The {@link SynopAnalyzerHandler} is responsible for handling commands, which are
  65  * sent to one of the channels.
  66  *
  67  * @author Gaël L'hopital - Initial contribution
  68  * @author Mark Herwege - Correction for timezone treatment
  69  */
  70 @NonNullByDefault
  71 public class SynopAnalyzerHandler extends BaseThingHandler {
  72     private static final String OGIMET_SYNOP_PATH = "http://www.ogimet.com/cgi-bin/getsynop?block=%s&begin=%s";
  73     private static final int REQUEST_TIMEOUT_MS = 5000;
  74     private static final DateTimeFormatter SYNOP_DATE_FORMAT = DateTimeFormatter.ofPattern("yyyyMMddHH00");
  75     private static final double KASTEN_POWER = 3.4;
  76     private static final double OCTA_MAX = 8.0;
  77
  78     private final Logger logger = LoggerFactory.getLogger(SynopAnalyzerHandler.class);
  79     private final LocationProvider locationProvider;
  80     private final List<Station> stations;
  81
  82     private Optional<ScheduledFuture<?>> refreshJob = Optional.empty();
  83     private @NonNullByDefault({}) String formattedStationId;
  84
  85     public SynopAnalyzerHandler(Thing thing, LocationProvider locationProvider, List<Station> stations) {
  86         super(thing);
  87         this.locationProvider = locationProvider;
  88         this.stations = stations;
  89     }
  90
  91     @Override
  92     public void initialize() {
  93         SynopAnalyzerConfiguration configuration = getConfigAs(SynopAnalyzerConfiguration.class);
  94         formattedStationId = String.format("%05d", configuration.stationId);
  95         logger.info("Scheduling Synop update thread to run every {} minute for Station '{}'",
  96                 configuration.refreshInterval, formattedStationId);
  97
  98         if (thing.getProperties().isEmpty()) {
  99             discoverAttributes(configuration.stationId, locationProvider.getLocation());
 100         }
 101
 102         updateStatus(ThingStatus.UNKNOWN);
 103
 104         refreshJob = Optional.of(scheduler.scheduleWithFixedDelay(this::updateChannels, 0,
 105                 configuration.refreshInterval, TimeUnit.MINUTES));
 106     }
 107
 108     private void discoverAttributes(int stationId, @Nullable PointType serverLocation) {
 109         stations.stream().filter(s -> stationId == s.idOmm).findFirst().ifPresent(station -> {
 110             Map<String, String> properties = new HashMap<>(
 111                     Map.of("Usual name", station.usualName, "Location", station.getLocation()));
 112
 113             if (serverLocation != null) {
 114                 PointType stationLocation = new PointType(station.getLocation());
 115                 DecimalType distance = serverLocation.distanceFrom(stationLocation);
 116
 117                 properties.put("Distance", new QuantityType<>(distance, SIUnits.METRE).toString());
 118             }
 119             updateProperties(properties);
 120         });
 121     }
 122
 123     private Optional<Synop> getLastAvailableSynop() {
 124         logger.debug("Retrieving last Synop message");
 125
 126         String url = forgeURL();
 127         try {
 128             String answer = HttpUtil.executeUrl(HttpMethod.GET, url, REQUEST_TIMEOUT_MS);
 129             List<String> messages = Arrays.asList(answer.split("\n"));
 130             if (!messages.isEmpty()) {
 131                 String message = messages.get(messages.size() - 1);
 132                 logger.debug(message);
 133                 if (message.startsWith(formattedStationId)) {
 134                     logger.debug("Valid Synop message received");
 135
 136                     List<String> messageParts = Arrays.asList(message.split(","));
 137                     String synopMessage = messageParts.get(messageParts.size() - 1);
 138
 139                     return createSynopObject(synopMessage);
 140                 }
 141                 logger.warn("Message does not belong to station {} : {}", formattedStationId, message);
 142             }
 143             logger.warn("No valid Synop found for last 24h");
 144         } catch (IOException e) {
 145             logger.warn("Synop request timedout : {}", e.getMessage());
 146         }
 147         return Optional.empty();
 148     }
 149
 150     private void updateChannels() {
 151         logger.debug("Updating device channels");
 152
 153         getLastAvailableSynop().ifPresentOrElse(synop -> {
 154             updateStatus(ThingStatus.ONLINE);
 155             getThing().getChannels().forEach(channel -> {
 156                 String channelId = channel.getUID().getId();
 157                 if (isLinked(channelId)) {
 158                     updateState(channelId, getChannelState(channelId, synop));
 159                 }
 160             });
 161         }, () -> updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.NONE, "No Synop message available"));
 162     }
 163
 164     private State getChannelState(String channelId, Synop synop) {
 165         int octa = synop.getOcta();
 166         switch (channelId) {
 167             case HORIZONTAL_VISIBILITY:
 168                 return new StringType(synop.getHorizontalVisibility().name());
 169             case OCTA:
 170                 return octa >= 0 ? new DecimalType(octa) : UnDefType.NULL;
 171             case ATTENUATION_FACTOR:
 172                 if (octa >= 0) {
 173                     double kc = Math.max(0, Math.min(octa, OCTA_MAX)) / OCTA_MAX;
 174                     kc = 1 - 0.75 * Math.pow(kc, KASTEN_POWER);
 175                     return new DecimalType(kc);
 176                 }
 177                 return UnDefType.NULL;
 178             case OVERCAST:
 179                 Overcast overcast = Overcast.fromOcta(octa);
 180                 return overcast == Overcast.UNDEFINED ? UnDefType.NULL : new StringType(overcast.name());
 181             case PRESSURE:
 182                 return new QuantityType<>(synop.getPressure(), PRESSURE_UNIT);
 183             case TEMPERATURE:
 184                 return new QuantityType<>(synop.getTemperature(), TEMPERATURE_UNIT);
 185             case WIND_ANGLE:
 186                 return new QuantityType<>(synop.getWindDirection(), WIND_DIRECTION_UNIT);
 187             case WIND_DIRECTION:
 188                 return new StringType(WindDirections.getWindDirection(synop.getWindDirection()).name());
 189             case WIND_STRENGTH:
 190                 return getWindStrength(synop);
 191             case WIND_SPEED_BEAUFORT:
 192                 QuantityType<Speed> wsKpH = getWindStrength(synop).toUnit(SIUnits.KILOMETRE_PER_HOUR);
 193                 return wsKpH != null ? new DecimalType(Math.round(Math.pow(wsKpH.floatValue() / 3.01, 0.666666666)))
 194                         : UnDefType.NULL;
 195             case TIME_UTC:
 196                 ZonedDateTime now = ZonedDateTime.now(ZoneOffset.UTC);
 197                 int year = synop.getYear() == 0 ? now.getYear() : synop.getYear();
 198                 int month = synop.getMonth() == 0 ? now.getMonth().getValue() : synop.getMonth();
 199                 return new DateTimeType(
 200                         ZonedDateTime.of(year, month, synop.getDay(), synop.getHour(), 0, 0, 0, ZoneOffset.UTC));
 201             default:
 202                 logger.error("Unsupported channel Id '{}'", channelId);
 203                 return UnDefType.UNDEF;
 204         }
 205     }
 206
 207     /**
 208      * Returns the wind strength depending upon the unit of the message.
 209      */
 210     private QuantityType<Speed> getWindStrength(Synop synop) {
 211         return new QuantityType<>(synop.getWindSpeed(), synop.getWindUnit());
 212     }
 213
 214     private Optional<Synop> createSynopObject(String synopMessage) {
 215         List<String> list = new ArrayList<>(Arrays.asList(synopMessage.split("\\s+")));
 216         if (synopMessage.startsWith(LAND_STATION_CODE)) {
 217             return Optional.of(new SynopLand(list));
 218         } else if (synopMessage.startsWith(SHIP_STATION_CODE)) {
 219             return Optional.of(new SynopShip(list));
 220         } else if (synopMessage.startsWith(MOBILE_LAND_STATION_CODE)) {
 221             return Optional.of(new SynopMobile(list));
 222         }
 223         return Optional.empty();
 224     }
 225
 226     private String forgeURL() {
 227         ZonedDateTime utc = ZonedDateTime.now(ZoneOffset.UTC).minusDays(1);
 228         String beginDate = SYNOP_DATE_FORMAT.format(utc);
 229         return String.format(OGIMET_SYNOP_PATH, formattedStationId, beginDate);
 230     }
 231
 232     @Override
 233     public void dispose() {
 234         refreshJob.ifPresent(job -> job.cancel(true));
 235         refreshJob = Optional.empty();
 236     }
 237
 238     @Override
 239     public void handleCommand(ChannelUID channelUID, Command command) {
 240         if (command == RefreshType.REFRESH) {
 241             updateChannels();
 242         }
 243     }
 244 }