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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.openuv.internal.handler;
  14
  15 import java.io.IOException;
  16 import java.time.Duration;
  17 import java.time.LocalDate;
  18 import java.time.LocalDateTime;
  19 import java.util.Collection;
  20 import java.util.Optional;
  21 import java.util.Properties;
  22 import java.util.Set;
  23 import java.util.concurrent.ScheduledFuture;
  24 import java.util.concurrent.TimeUnit;
  25
  26 import org.eclipse.jdt.annotation.NonNullByDefault;
  27 import org.eclipse.jdt.annotation.Nullable;
  28 import org.openhab.binding.openuv.internal.OpenUVException;
  29 import org.openhab.binding.openuv.internal.config.BridgeConfiguration;
  30 import org.openhab.binding.openuv.internal.discovery.OpenUVDiscoveryService;
  31 import org.openhab.binding.openuv.internal.json.OpenUVResponse;
  32 import org.openhab.binding.openuv.internal.json.OpenUVResult;
  33 import org.openhab.core.i18n.LocaleProvider;
  34 import org.openhab.core.i18n.LocationProvider;
  35 import org.openhab.core.i18n.TranslationProvider;
  36 import org.openhab.core.io.net.http.HttpUtil;
  37 import org.openhab.core.library.types.PointType;
  38 import org.openhab.core.thing.Bridge;
  39 import org.openhab.core.thing.ChannelUID;
  40 import org.openhab.core.thing.ThingStatus;
  41 import org.openhab.core.thing.ThingStatusDetail;
  42 import org.openhab.core.thing.binding.BaseBridgeHandler;
  43 import org.openhab.core.thing.binding.ThingHandlerService;
  44 import org.openhab.core.types.Command;
  45 import org.openhab.core.types.RefreshType;
  46 import org.slf4j.Logger;
  47 import org.slf4j.LoggerFactory;
  48
  49 import com.google.gson.Gson;
  50 import com.google.gson.JsonSyntaxException;
  51
  52 /**
  53  * {@link OpenUVBridgeHandler} is the handler for OpenUV API and connects it
  54  * to the webservice.
  55  *
  56  * @author Gaël L'hopital - Initial contribution
  57  *
  58  */
  59 @NonNullByDefault
  60 public class OpenUVBridgeHandler extends BaseBridgeHandler {
  61     private static final String QUERY_URL = "https://api.openuv.io/api/v1/uv?lat=%s&lng=%s&alt=%s";
  62     private static final int RECONNECT_DELAY_MIN = 5;
  63     private static final int REQUEST_TIMEOUT_MS = (int) TimeUnit.SECONDS.toMillis(30);
  64
  65     private final Logger logger = LoggerFactory.getLogger(OpenUVBridgeHandler.class);
  66     private final Properties header = new Properties();
  67     private final Gson gson;
  68     private final LocationProvider locationProvider;
  69     private final TranslationProvider i18nProvider;
  70     private final LocaleProvider localeProvider;
  71
  72     private Optional<ScheduledFuture<?>> reconnectJob = Optional.empty();
  73     private boolean keyVerified;
  74
  75     public OpenUVBridgeHandler(Bridge bridge, LocationProvider locationProvider, TranslationProvider i18nProvider,
  76             LocaleProvider localeProvider, Gson gson) {
  77         super(bridge);
  78         this.gson = gson;
  79         this.locationProvider = locationProvider;
  80         this.i18nProvider = i18nProvider;
  81         this.localeProvider = localeProvider;
  82     }
  83
  84     @Override
  85     public void initialize() {
  86         logger.debug("Initializing OpenUV API bridge handler.");
  87         keyVerified = false;
  88         BridgeConfiguration config = getConfigAs(BridgeConfiguration.class);
  89         if (config.apikey.isEmpty()) {
  90             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
  91                     "@text/offline.config-error-unknown-apikey");
  92             return;
  93         }
  94         header.put("x-access-token", config.apikey);
  95         initiateConnexion();
  96     }
  97
  98     @Override
  99     public void dispose() {
 100         freeReconnectJob();
 101     }
 102
 103     @Override
 104     public void handleCommand(ChannelUID channelUID, Command command) {
 105         if (command instanceof RefreshType) {
 106             initiateConnexion();
 107             return;
 108         }
 109         logger.debug("The OpenUV bridge only handles Refresh command and not '{}'", command);
 110     }
 111
 112     private void initiateConnexion() {
 113         // Just checking if the provided api key is a valid one by making a fake call
 114         getUVData("0", "0", "0");
 115     }
 116
 117     public @Nullable OpenUVResult getUVData(String latitude, String longitude, String altitude) {
 118         String statusMessage = "";
 119         ThingStatusDetail statusDetail = ThingStatusDetail.COMMUNICATION_ERROR;
 120         String url = String.format(QUERY_URL, latitude, longitude, altitude);
 121         String jsonData = "";
 122         try {
 123             jsonData = HttpUtil.executeUrl("GET", url, header, null, null, REQUEST_TIMEOUT_MS);
 124             OpenUVResponse uvResponse = gson.fromJson(jsonData, OpenUVResponse.class);
 125             if (uvResponse != null) {
 126                 String error = uvResponse.getError();
 127                 if (error == null) {
 128                     updateStatus(ThingStatus.ONLINE);
 129                     keyVerified = true;
 130                     return uvResponse.getResult();
 131                 }
 132                 throw new OpenUVException(error);
 133             }
 134         } catch (JsonSyntaxException e) {
 135             if (jsonData.contains("MongoError")) {
 136                 statusMessage = String.format("@text/offline.comm-error-faultly-service [ \"%d\" ]",
 137                         RECONNECT_DELAY_MIN);
 138                 scheduleReconnectJob(RECONNECT_DELAY_MIN);
 139             } else {
 140                 statusDetail = ThingStatusDetail.NONE;
 141                 statusMessage = String.format("@text/offline.invalid-json [ \"%s\" ]", url);
 142                 logger.debug("{} : {}", statusMessage, jsonData);
 143             }
 144         } catch (IOException e) {
 145             statusMessage = e.getMessage();
 146         } catch (OpenUVException e) {
 147             if (e.isQuotaError()) {
 148                 LocalDateTime nextMidnight = LocalDate.now().plusDays(1).atStartOfDay().plusMinutes(2);
 149                 statusMessage = String.format("@text/offline.comm-error-quota-exceeded [ \"%s\" ]",
 150                         nextMidnight.toString());
 151                 scheduleReconnectJob(Duration.between(LocalDateTime.now(), nextMidnight).toMinutes());
 152             } else if (e.isApiKeyError()) {
 153                 if (keyVerified) {
 154                     statusMessage = String.format("@text/offline.api-key-not-recognized [ \"%d\" ]",
 155                             RECONNECT_DELAY_MIN);
 156                     scheduleReconnectJob(RECONNECT_DELAY_MIN);
 157                 } else {
 158                     statusDetail = ThingStatusDetail.CONFIGURATION_ERROR;
 159                 }
 160             }
 161         }
 162         updateStatus(ThingStatus.OFFLINE, statusDetail, statusMessage);
 163         return null;
 164     }
 165
 166     private void scheduleReconnectJob(long delay) {
 167         freeReconnectJob();
 168         reconnectJob = Optional.of(scheduler.schedule(this::initiateConnexion, delay, TimeUnit.MINUTES));
 169     }
 170
 171     private void freeReconnectJob() {
 172         reconnectJob.ifPresent(job -> job.cancel(true));
 173         reconnectJob = Optional.empty();
 174     }
 175
 176     @Override
 177     public Collection<Class<? extends ThingHandlerService>> getServices() {
 178         return Set.of(OpenUVDiscoveryService.class);
 179     }
 180
 181     public @Nullable PointType getLocation() {
 182         return locationProvider.getLocation();
 183     }
 184
 185     public TranslationProvider getI18nProvider() {
 186         return i18nProvider;
 187     }
 188
 189     public LocaleProvider getLocaleProvider() {
 190         return localeProvider;
 191     }
 192 }