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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.tesla.internal.handler;
  14
  15 import static org.openhab.binding.tesla.internal.TeslaBindingConstants.*;
  16
  17 import java.time.Instant;
  18 import java.time.ZoneId;
  19 import java.time.format.DateTimeFormatter;
  20 import java.util.Collection;
  21 import java.util.HashSet;
  22 import java.util.List;
  23 import java.util.Set;
  24 import java.util.concurrent.ScheduledFuture;
  25 import java.util.concurrent.TimeUnit;
  26 import java.util.concurrent.locks.ReentrantLock;
  27
  28 import javax.ws.rs.client.Client;
  29 import javax.ws.rs.client.Entity;
  30 import javax.ws.rs.client.WebTarget;
  31 import javax.ws.rs.core.MediaType;
  32 import javax.ws.rs.core.Response;
  33
  34 import org.openhab.binding.tesla.internal.TeslaBindingConstants;
  35 import org.openhab.binding.tesla.internal.discovery.TeslaVehicleDiscoveryService;
  36 import org.openhab.binding.tesla.internal.protocol.Vehicle;
  37 import org.openhab.binding.tesla.internal.protocol.VehicleConfig;
  38 import org.openhab.binding.tesla.internal.protocol.VehicleData;
  39 import org.openhab.binding.tesla.internal.protocol.sso.TokenResponse;
  40 import org.openhab.core.io.net.http.HttpClientFactory;
  41 import org.openhab.core.thing.Bridge;
  42 import org.openhab.core.thing.ChannelUID;
  43 import org.openhab.core.thing.Thing;
  44 import org.openhab.core.thing.ThingStatus;
  45 import org.openhab.core.thing.ThingStatusDetail;
  46 import org.openhab.core.thing.ThingStatusInfo;
  47 import org.openhab.core.thing.ThingTypeMigrationService;
  48 import org.openhab.core.thing.binding.BaseBridgeHandler;
  49 import org.openhab.core.thing.binding.ThingHandlerService;
  50 import org.openhab.core.types.Command;
  51 import org.slf4j.Logger;
  52 import org.slf4j.LoggerFactory;
  53
  54 import com.google.gson.Gson;
  55 import com.google.gson.JsonObject;
  56 import com.google.gson.JsonParser;
  57
  58 /**
  59  * The {@link TeslaAccountHandler} is responsible for handling commands, which are sent
  60  * to one of the channels.
  61  *
  62  * @author Karel Goderis - Initial contribution
  63  * @author Nicolai Grødum - Adding token based auth
  64  * @author Kai Kreuzer - refactored to use separate vehicle handlers
  65  */
  66 public class TeslaAccountHandler extends BaseBridgeHandler {
  67
  68     public static final int API_MAXIMUM_ERRORS_IN_INTERVAL = 3;
  69     public static final int API_ERROR_INTERVAL_SECONDS = 15;
  70     private static final int CONNECT_RETRY_INTERVAL = 15000;
  71     private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
  72             .withZone(ZoneId.systemDefault());
  73
  74     private final Logger logger = LoggerFactory.getLogger(TeslaAccountHandler.class);
  75
  76     // REST Client API variables
  77     private final WebTarget teslaTarget;
  78     WebTarget vehiclesTarget; // this cannot be marked final as it is used in the runnable
  79     final WebTarget vehicleTarget;
  80     final WebTarget dataRequestTarget;
  81     final WebTarget commandTarget;
  82     final WebTarget wakeUpTarget;
  83
  84     private final TeslaSSOHandler ssoHandler;
  85     private final ThingTypeMigrationService thingTypeMigrationService;
  86
  87     // Threading and Job related variables
  88     protected ScheduledFuture<?> connectJob;
  89
  90     protected long lastTimeStamp;
  91     protected long apiIntervalTimestamp;
  92     protected int apiIntervalErrors;
  93     protected long eventIntervalTimestamp;
  94     protected int eventIntervalErrors;
  95     protected ReentrantLock lock;
  96
  97     private final Gson gson = new Gson();
  98
  99     private TokenResponse logonToken;
 100     private final Set<VehicleListener> vehicleListeners = new HashSet<>();
 101
 102     public TeslaAccountHandler(Bridge bridge, Client teslaClient, HttpClientFactory httpClientFactory,
 103             ThingTypeMigrationService thingTypeMigrationService) {
 104         super(bridge);
 105         this.teslaTarget = teslaClient.target(URI_OWNERS);
 106         this.ssoHandler = new TeslaSSOHandler(httpClientFactory.getCommonHttpClient());
 107         this.thingTypeMigrationService = thingTypeMigrationService;
 108
 109         this.vehiclesTarget = teslaTarget.path(API_VERSION).path(VEHICLES);
 110         this.vehicleTarget = vehiclesTarget.path(PATH_VEHICLE_ID);
 111         this.dataRequestTarget = vehicleTarget.path(PATH_DATA_REQUEST);
 112         this.commandTarget = vehicleTarget.path(PATH_COMMAND);
 113         this.wakeUpTarget = vehicleTarget.path(PATH_WAKE_UP);
 114     }
 115
 116     @Override
 117     public void initialize() {
 118         logger.debug("Initializing the Tesla account handler for {}", this.getStorageKey());
 119
 120         updateStatus(ThingStatus.UNKNOWN);
 121
 122         lock = new ReentrantLock();
 123         lock.lock();
 124
 125         try {
 126             if (connectJob == null || connectJob.isCancelled()) {
 127                 connectJob = scheduler.scheduleWithFixedDelay(connectRunnable, 0, CONNECT_RETRY_INTERVAL,
 128                         TimeUnit.MILLISECONDS);
 129             }
 130         } finally {
 131             lock.unlock();
 132         }
 133     }
 134
 135     @Override
 136     public void dispose() {
 137         logger.debug("Disposing the Tesla account handler for {}", getThing().getUID());
 138
 139         lock.lock();
 140         try {
 141             if (connectJob != null && !connectJob.isCancelled()) {
 142                 connectJob.cancel(true);
 143                 connectJob = null;
 144             }
 145         } finally {
 146             lock.unlock();
 147         }
 148     }
 149
 150     public void scanForVehicles() {
 151         scheduler.execute(this::queryVehicles);
 152     }
 153
 154     public void addVehicleListener(VehicleListener listener) {
 155         this.vehicleListeners.add(listener);
 156     }
 157
 158     public void removeVehicleListener(VehicleListener listener) {
 159         this.vehicleListeners.remove(listener);
 160     }
 161
 162     @Override
 163     public void handleCommand(ChannelUID channelUID, Command command) {
 164         // we do not have any channels -> nothing to do here
 165     }
 166
 167     public String getAuthHeader() {
 168         if (logonToken != null) {
 169             return "Bearer " + logonToken.access_token;
 170         } else {
 171             return null;
 172         }
 173     }
 174
 175     public String getAccessToken() {
 176         return logonToken.access_token;
 177     }
 178
 179     protected boolean checkResponse(Response response, boolean immediatelyFail) {
 180         if (response != null && response.getStatus() == 200) {
 181             return true;
 182         } else if (response != null && response.getStatus() == 401) {
 183             logger.debug("The access token has expired, trying to get a new one.");
 184             ThingStatusInfo authenticationResult = authenticate();
 185             updateStatus(authenticationResult.getStatus(), authenticationResult.getStatusDetail(),
 186                     authenticationResult.getDescription());
 187         } else {
 188             apiIntervalErrors++;
 189             if (immediatelyFail || apiIntervalErrors >= API_MAXIMUM_ERRORS_IN_INTERVAL) {
 190                 if (immediatelyFail) {
 191                     logger.warn("Got an unsuccessful result, setting vehicle to offline and will try again");
 192                 } else {
 193                     logger.warn("Reached the maximum number of errors ({}) for the current interval ({} seconds)",
 194                             API_MAXIMUM_ERRORS_IN_INTERVAL, API_ERROR_INTERVAL_SECONDS);
 195                     apiIntervalErrors = 0;
 196                 }
 197                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR);
 198             } else if ((System.currentTimeMillis() - apiIntervalTimestamp) > 1000 * API_ERROR_INTERVAL_SECONDS) {
 199                 logger.trace("Resetting the error counter. ({} errors in the last interval)", apiIntervalErrors);
 200                 apiIntervalTimestamp = System.currentTimeMillis();
 201                 apiIntervalErrors = 0;
 202             }
 203         }
 204
 205         return false;
 206     }
 207
 208     protected Vehicle[] queryVehicles() {
 209         String authHeader = getAuthHeader();
 210
 211         if (authHeader != null) {
 212             // get a list of vehicles
 213             Response response = vehiclesTarget.request(MediaType.APPLICATION_JSON_TYPE)
 214                     .header("Authorization", authHeader).get();
 215
 216             logger.debug("Querying the vehicle: Response: {}: {}", response.getStatus(),
 217                     response.getStatusInfo().getReasonPhrase());
 218
 219             if (!checkResponse(response, true)) {
 220                 logger.debug("An error occurred while querying the vehicle");
 221                 return null;
 222             }
 223
 224             JsonObject jsonObject = JsonParser.parseString(response.readEntity(String.class)).getAsJsonObject();
 225             Vehicle[] vehicleArray = gson.fromJson(jsonObject.getAsJsonArray("response"), Vehicle[].class);
 226
 227             for (Vehicle vehicle : vehicleArray) {
 228                 String responseString = invokeAndParse(vehicle.id, null, null, dataRequestTarget, 0);
 229                 VehicleConfig vehicleConfig = null;
 230                 if (responseString != null && !responseString.isBlank()) {
 231                     vehicleConfig = gson.fromJson(responseString, VehicleData.class).vehicle_config;
 232                 }
 233                 for (VehicleListener listener : vehicleListeners) {
 234                     listener.vehicleFound(vehicle, vehicleConfig);
 235                 }
 236                 for (Thing vehicleThing : getThing().getThings()) {
 237                     if (vehicle.vin.equals(vehicleThing.getConfiguration().get(VIN))) {
 238                         TeslaVehicleHandler vehicleHandler = (TeslaVehicleHandler) vehicleThing.getHandler();
 239                         if (vehicleHandler != null) {
 240                             if (TeslaBindingConstants.THING_TYPE_VEHICLE.equals(vehicleThing.getThingTypeUID())
 241                                     && vehicleConfig != null) {
 242                                 // Seems the type of this vehicle has not been identified before, so let's switch the
 243                                 // thing type of it
 244                                 thingTypeMigrationService.migrateThingType(vehicleThing, vehicleConfig.identifyModel(),
 245                                         vehicleThing.getConfiguration());
 246                                 break;
 247                             }
 248                             logger.debug("Querying the vehicle: VIN {}", vehicle.vin);
 249                             String vehicleJSON = gson.toJson(vehicle);
 250                             vehicleHandler.parseAndUpdate("queryVehicle", null, vehicleJSON);
 251                             logger.trace("Vehicle is id {}/vehicle_id {}/tokens {}", vehicle.id, vehicle.vehicle_id,
 252                                     vehicle.tokens);
 253                         }
 254                     }
 255                 }
 256             }
 257             return vehicleArray;
 258         } else {
 259             return new Vehicle[0];
 260         }
 261     }
 262
 263     private String getStorageKey() {
 264         return this.getThing().getUID().getId();
 265     }
 266
 267     ThingStatusInfo authenticate() {
 268         TokenResponse token = logonToken;
 269
 270         boolean hasExpired = true;
 271         logger.debug("Current authentication time {}", DATE_FORMATTER.format(Instant.now()));
 272
 273         if (token != null) {
 274             Instant tokenCreationInstant = Instant.ofEpochMilli(token.created_at * 1000);
 275             Instant tokenExpiresInstant = Instant.ofEpochMilli((token.created_at + token.expires_in) * 1000);
 276             logger.debug("Found a request token from {}", DATE_FORMATTER.format(tokenCreationInstant));
 277             logger.debug("Access token expiration time {}", DATE_FORMATTER.format(tokenExpiresInstant));
 278
 279             if (tokenExpiresInstant.isBefore(Instant.now())) {
 280                 logger.debug("The access token has expired");
 281                 hasExpired = true;
 282             } else {
 283                 logger.debug("The access token has not expired yet");
 284                 hasExpired = false;
 285             }
 286         }
 287
 288         if (hasExpired) {
 289             String refreshToken = (String) getConfig().get(CONFIG_REFRESHTOKEN);
 290
 291             if (refreshToken == null || refreshToken.isEmpty()) {
 292                 return new ThingStatusInfo(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 293                         "No refresh token is provided.");
 294             }
 295
 296             this.logonToken = ssoHandler.getAccessToken(refreshToken);
 297             if (this.logonToken == null) {
 298                 return new ThingStatusInfo(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 299                         "Failed to obtain access token for API.");
 300             }
 301         }
 302
 303         return new ThingStatusInfo(ThingStatus.ONLINE, ThingStatusDetail.NONE, null);
 304     }
 305
 306     protected String invokeAndParse(String vehicleId, String command, String payLoad, WebTarget target,
 307             int noOfretries) {
 308         logger.debug("Invoking: {}", command);
 309
 310         if (vehicleId != null) {
 311             Response response;
 312
 313             if (payLoad != null) {
 314                 if (command != null) {
 315                     response = target.resolveTemplate("cmd", command).resolveTemplate("vid", vehicleId).request()
 316                             .header("Authorization", "Bearer " + logonToken.access_token)
 317                             .post(Entity.entity(payLoad, MediaType.APPLICATION_JSON_TYPE));
 318                 } else {
 319                     response = target.resolveTemplate("vid", vehicleId).request()
 320                             .header("Authorization", "Bearer " + logonToken.access_token)
 321                             .post(Entity.entity(payLoad, MediaType.APPLICATION_JSON_TYPE));
 322                 }
 323             } else if (command != null) {
 324                 response = target.resolveTemplate("cmd", command).resolveTemplate("vid", vehicleId)
 325                         .request(MediaType.APPLICATION_JSON_TYPE)
 326                         .header("Authorization", "Bearer " + logonToken.access_token).get();
 327             } else {
 328                 response = target.resolveTemplate("vid", vehicleId).request(MediaType.APPLICATION_JSON_TYPE)
 329                         .header("Authorization", "Bearer " + logonToken.access_token).get();
 330             }
 331
 332             if (!checkResponse(response, false)) {
 333                 logger.debug("An error occurred while communicating with the vehicle during request {}: {}: {}",
 334                         command, (response != null) ? response.getStatus() : "",
 335                         (response != null) ? response.getStatusInfo().getReasonPhrase() : "No Response");
 336                 if (response.getStatus() == 408 && noOfretries > 0) {
 337                     try {
 338                         // we give the vehicle a moment to wake up and try the request again
 339                         Thread.sleep(TimeUnit.SECONDS.toMillis(API_ERROR_INTERVAL_SECONDS));
 340                         logger.debug("Retrying to send the command {}.", command);
 341                         return invokeAndParse(vehicleId, command, payLoad, target, noOfretries - 1);
 342                     } catch (InterruptedException e) {
 343                     }
 344                 }
 345                 return null;
 346             }
 347
 348             try {
 349                 JsonObject jsonObject = JsonParser.parseString(response.readEntity(String.class)).getAsJsonObject();
 350                 logger.trace("Request : {}:{} yields {}", command, payLoad, jsonObject.get("response"));
 351                 return jsonObject.get("response").toString();
 352             } catch (Exception e) {
 353                 logger.error("An exception occurred while invoking a REST request: '{}'", e.getMessage());
 354             }
 355         }
 356
 357         return null;
 358     }
 359
 360     protected Runnable connectRunnable = () -> {
 361         try {
 362             lock.lock();
 363
 364             ThingStatusInfo status = getThing().getStatusInfo();
 365             if ((status.getStatus() != ThingStatus.ONLINE
 366                     && status.getStatusDetail() != ThingStatusDetail.CONFIGURATION_ERROR)
 367                     || hasUnidentifiedVehicles()) {
 368                 logger.debug("Setting up an authenticated connection to the Tesla back-end");
 369
 370                 ThingStatusInfo authenticationResult = authenticate();
 371                 updateStatus(authenticationResult.getStatus(), authenticationResult.getStatusDetail(),
 372                         authenticationResult.getDescription());
 373
 374                 if (authenticationResult.getStatus() == ThingStatus.ONLINE) {
 375                     // get a list of vehicles
 376                     Response response = vehiclesTarget.request(MediaType.APPLICATION_JSON_TYPE)
 377                             .header("Authorization", "Bearer " + logonToken.access_token).get();
 378
 379                     if (response != null && response.getStatus() == 200 && response.hasEntity()) {
 380                         updateStatus(ThingStatus.ONLINE);
 381                         for (Vehicle vehicle : queryVehicles()) {
 382                             Bridge bridge = getBridge();
 383                             if (bridge != null) {
 384                                 List<Thing> things = bridge.getThings();
 385                                 for (int i = 0; i < things.size(); i++) {
 386                                     Thing thing = things.get(i);
 387                                     TeslaVehicleHandler handler = (TeslaVehicleHandler) thing.getHandler();
 388                                     if (handler != null) {
 389                                         if (vehicle.vin.equals(thing.getConfiguration().get(VIN))) {
 390                                             logger.debug(
 391                                                     "Found the vehicle with VIN '{}' in the list of vehicles you own",
 392                                                     getConfig().get(VIN));
 393                                             apiIntervalErrors = 0;
 394                                             apiIntervalTimestamp = System.currentTimeMillis();
 395                                         } else {
 396                                             logger.warn(
 397                                                     "Unable to find the vehicle with VIN '{}' in the list of vehicles you own",
 398                                                     getConfig().get(VIN));
 399                                             handler.updateStatus(ThingStatus.OFFLINE,
 400                                                     ThingStatusDetail.CONFIGURATION_ERROR,
 401                                                     "Vin is not available through this account.");
 402                                         }
 403                                     }
 404                                 }
 405                             }
 406                         }
 407                     } else if (response != null) {
 408                         logger.error("Error fetching the list of vehicles : {}:{}", response.getStatus(),
 409                                 response.getStatusInfo());
 410                         updateStatus(ThingStatus.OFFLINE);
 411                     }
 412                 } else if (authenticationResult.getStatusDetail() == ThingStatusDetail.CONFIGURATION_ERROR) {
 413                     // make sure to set thing to CONFIGURATION_ERROR in case of failed authentication in order not to
 414                     // hit request limit on retries on the Tesla SSO endpoints.
 415                     updateStatus(ThingStatus.OFFLINE, authenticationResult.getStatusDetail());
 416                 }
 417             }
 418         } catch (Exception e) {
 419             logger.error("An exception occurred while connecting to the Tesla back-end: '{}'", e.getMessage(), e);
 420         } finally {
 421             lock.unlock();
 422         }
 423     };
 424
 425     private boolean hasUnidentifiedVehicles() {
 426         return getThing().getThings().stream()
 427                 .anyMatch(vehicle -> TeslaBindingConstants.THING_TYPE_VEHICLE.equals(vehicle.getThingTypeUID()));
 428     }
 429
 430     protected class Request implements Runnable {
 431
 432         private static final int NO_OF_RETRIES = 3;
 433
 434         private TeslaVehicleHandler handler;
 435         private String request;
 436         private String payLoad;
 437         private WebTarget target;
 438         private boolean allowWakeUpForCommands;
 439
 440         public Request(TeslaVehicleHandler handler, String request, String payLoad, WebTarget target,
 441                 boolean allowWakeUpForCommands) {
 442             this.handler = handler;
 443             this.request = request;
 444             this.payLoad = payLoad;
 445             this.target = target;
 446             this.allowWakeUpForCommands = allowWakeUpForCommands;
 447         }
 448
 449         @Override
 450         public void run() {
 451             try {
 452                 String result = "";
 453
 454                 if (getThing().getStatus() == ThingStatus.ONLINE) {
 455                     result = invokeAndParse(handler.getVehicleId(), request, payLoad, target,
 456                             allowWakeUpForCommands ? NO_OF_RETRIES : 0);
 457                     if (result != null && !"".equals(result)) {
 458                         handler.parseAndUpdate(request, payLoad, result);
 459                     }
 460                 }
 461             } catch (Exception e) {
 462                 logger.error("An exception occurred while executing a request to the vehicle: '{}'", e.getMessage(), e);
 463             }
 464         }
 465     }
 466
 467     public Request newRequest(TeslaVehicleHandler teslaVehicleHandler, String command, String payLoad, WebTarget target,
 468             boolean allowWakeUpForCommands) {
 469         return new Request(teslaVehicleHandler, command, payLoad, target, allowWakeUpForCommands);
 470     }
 471
 472     @Override
 473     public Collection<Class<? extends ThingHandlerService>> getServices() {
 474         return List.of(TeslaVehicleDiscoveryService.class);
 475     }
 476 }