git.basschouten.com Git - openhab-addons.git/blob

   1 /**
   2  * Copyright (c) 2010-2021 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.io.IOException;
  18 import java.nio.charset.StandardCharsets;
  19 import java.time.Instant;
  20 import java.time.ZoneId;
  21 import java.time.format.DateTimeFormatter;
  22 import java.util.Base64;
  23 import java.util.Collection;
  24 import java.util.Collections;
  25 import java.util.HashSet;
  26 import java.util.List;
  27 import java.util.Set;
  28 import java.util.concurrent.ScheduledFuture;
  29 import java.util.concurrent.TimeUnit;
  30 import java.util.concurrent.locks.ReentrantLock;
  31
  32 import javax.ws.rs.client.Client;
  33 import javax.ws.rs.client.ClientRequestContext;
  34 import javax.ws.rs.client.ClientRequestFilter;
  35 import javax.ws.rs.client.Entity;
  36 import javax.ws.rs.client.WebTarget;
  37 import javax.ws.rs.core.MediaType;
  38 import javax.ws.rs.core.MultivaluedMap;
  39 import javax.ws.rs.core.Response;
  40
  41 import org.openhab.binding.tesla.internal.TeslaBindingConstants;
  42 import org.openhab.binding.tesla.internal.discovery.TeslaVehicleDiscoveryService;
  43 import org.openhab.binding.tesla.internal.protocol.Vehicle;
  44 import org.openhab.binding.tesla.internal.protocol.VehicleConfig;
  45 import org.openhab.binding.tesla.internal.protocol.sso.TokenResponse;
  46 import org.openhab.core.config.core.Configuration;
  47 import org.openhab.core.io.net.http.HttpClientFactory;
  48 import org.openhab.core.thing.Bridge;
  49 import org.openhab.core.thing.ChannelUID;
  50 import org.openhab.core.thing.Thing;
  51 import org.openhab.core.thing.ThingStatus;
  52 import org.openhab.core.thing.ThingStatusDetail;
  53 import org.openhab.core.thing.ThingStatusInfo;
  54 import org.openhab.core.thing.binding.BaseBridgeHandler;
  55 import org.openhab.core.thing.binding.ThingHandlerService;
  56 import org.openhab.core.types.Command;
  57 import org.slf4j.Logger;
  58 import org.slf4j.LoggerFactory;
  59
  60 import com.google.gson.Gson;
  61 import com.google.gson.JsonObject;
  62 import com.google.gson.JsonParser;
  63
  64 /**
  65  * The {@link TeslaAccountHandler} is responsible for handling commands, which are sent
  66  * to one of the channels.
  67  *
  68  * @author Karel Goderis - Initial contribution
  69  * @author Nicolai Grødum - Adding token based auth
  70  * @author Kai Kreuzer - refactored to use separate vehicle handlers
  71  */
  72 public class TeslaAccountHandler extends BaseBridgeHandler {
  73
  74     public static final int API_MAXIMUM_ERRORS_IN_INTERVAL = 2;
  75     public static final int API_ERROR_INTERVAL_SECONDS = 15;
  76     private static final int CONNECT_RETRY_INTERVAL = 15000;
  77     private static final DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
  78             .withZone(ZoneId.systemDefault());
  79
  80     private final Logger logger = LoggerFactory.getLogger(TeslaAccountHandler.class);
  81
  82     // REST Client API variables
  83     private final WebTarget teslaTarget;
  84     WebTarget vehiclesTarget; // this cannot be marked final as it is used in the runnable
  85     final WebTarget vehicleTarget;
  86     final WebTarget dataRequestTarget;
  87     final WebTarget commandTarget;
  88     final WebTarget wakeUpTarget;
  89
  90     private final TeslaSSOHandler ssoHandler;
  91
  92     // Threading and Job related variables
  93     protected ScheduledFuture<?> connectJob;
  94
  95     protected long lastTimeStamp;
  96     protected long apiIntervalTimestamp;
  97     protected int apiIntervalErrors;
  98     protected long eventIntervalTimestamp;
  99     protected int eventIntervalErrors;
 100     protected ReentrantLock lock;
 101
 102     private final Gson gson = new Gson();
 103
 104     private TokenResponse logonToken;
 105     private final Set<VehicleListener> vehicleListeners = new HashSet<>();
 106
 107     public TeslaAccountHandler(Bridge bridge, Client teslaClient, HttpClientFactory httpClientFactory) {
 108         super(bridge);
 109         this.teslaTarget = teslaClient.target(URI_OWNERS);
 110         this.ssoHandler = new TeslaSSOHandler(httpClientFactory.getCommonHttpClient());
 111
 112         this.vehiclesTarget = teslaTarget.path(API_VERSION).path(VEHICLES);
 113         this.vehicleTarget = vehiclesTarget.path(PATH_VEHICLE_ID);
 114         this.dataRequestTarget = vehicleTarget.path(PATH_DATA_REQUEST);
 115         this.commandTarget = vehicleTarget.path(PATH_COMMAND);
 116         this.wakeUpTarget = vehicleTarget.path(PATH_WAKE_UP);
 117     }
 118
 119     @Override
 120     public void initialize() {
 121         logger.trace("Initializing the Tesla account handler for {}", this.getStorageKey());
 122
 123         updateStatus(ThingStatus.UNKNOWN);
 124
 125         lock = new ReentrantLock();
 126         lock.lock();
 127
 128         try {
 129             if (connectJob == null || connectJob.isCancelled()) {
 130                 connectJob = scheduler.scheduleWithFixedDelay(connectRunnable, 0, CONNECT_RETRY_INTERVAL,
 131                         TimeUnit.MILLISECONDS);
 132             }
 133         } finally {
 134             lock.unlock();
 135         }
 136     }
 137
 138     @Override
 139     public void dispose() {
 140         logger.trace("Disposing the Tesla account handler for {}", getThing().getUID());
 141
 142         lock.lock();
 143         try {
 144             if (connectJob != null && !connectJob.isCancelled()) {
 145                 connectJob.cancel(true);
 146                 connectJob = null;
 147             }
 148         } finally {
 149             lock.unlock();
 150         }
 151     }
 152
 153     public void scanForVehicles() {
 154         scheduler.execute(() -> queryVehicles());
 155     }
 156
 157     public void addVehicleListener(VehicleListener listener) {
 158         this.vehicleListeners.add(listener);
 159     }
 160
 161     public void removeVehicleListener(VehicleListener listener) {
 162         this.vehicleListeners.remove(listener);
 163     }
 164
 165     @Override
 166     public void handleCommand(ChannelUID channelUID, Command command) {
 167         // we do not have any channels -> nothing to do here
 168     }
 169
 170     public String getAuthHeader() {
 171         if (logonToken != null) {
 172             return "Bearer " + logonToken.access_token;
 173         } else {
 174             return null;
 175         }
 176     }
 177
 178     protected boolean checkResponse(Response response, boolean immediatelyFail) {
 179         if (response != null && response.getStatus() == 200) {
 180             return true;
 181         } else {
 182             apiIntervalErrors++;
 183             if (immediatelyFail || apiIntervalErrors >= API_MAXIMUM_ERRORS_IN_INTERVAL) {
 184                 if (immediatelyFail) {
 185                     logger.warn("Got an unsuccessful result, setting vehicle to offline and will try again");
 186                 } else {
 187                     logger.warn("Reached the maximum number of errors ({}) for the current interval ({} seconds)",
 188                             API_MAXIMUM_ERRORS_IN_INTERVAL, API_ERROR_INTERVAL_SECONDS);
 189                 }
 190
 191                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR);
 192             } else if ((System.currentTimeMillis() - apiIntervalTimestamp) > 1000 * API_ERROR_INTERVAL_SECONDS) {
 193                 logger.trace("Resetting the error counter. ({} errors in the last interval)", apiIntervalErrors);
 194                 apiIntervalTimestamp = System.currentTimeMillis();
 195                 apiIntervalErrors = 0;
 196             }
 197         }
 198
 199         return false;
 200     }
 201
 202     protected Vehicle[] queryVehicles() {
 203         String authHeader = getAuthHeader();
 204
 205         if (authHeader != null) {
 206             // get a list of vehicles
 207             Response response = vehiclesTarget.request(MediaType.APPLICATION_JSON_TYPE)
 208                     .header("Authorization", authHeader).get();
 209
 210             logger.debug("Querying the vehicle: Response: {}:{}", response.getStatus(), response.getStatusInfo());
 211
 212             if (!checkResponse(response, true)) {
 213                 logger.error("An error occurred while querying the vehicle");
 214                 return null;
 215             }
 216
 217             JsonObject jsonObject = JsonParser.parseString(response.readEntity(String.class)).getAsJsonObject();
 218             Vehicle[] vehicleArray = gson.fromJson(jsonObject.getAsJsonArray("response"), Vehicle[].class);
 219
 220             for (Vehicle vehicle : vehicleArray) {
 221                 String responseString = invokeAndParse(vehicle.id, VEHICLE_CONFIG, null, dataRequestTarget);
 222                 if (responseString == null || responseString.isBlank()) {
 223                     continue;
 224                 }
 225                 VehicleConfig vehicleConfig = gson.fromJson(responseString, VehicleConfig.class);
 226                 for (VehicleListener listener : vehicleListeners) {
 227                     listener.vehicleFound(vehicle, vehicleConfig);
 228                 }
 229                 for (Thing vehicleThing : getThing().getThings()) {
 230                     if (vehicle.vin.equals(vehicleThing.getConfiguration().get(VIN))) {
 231                         TeslaVehicleHandler vehicleHandler = (TeslaVehicleHandler) vehicleThing.getHandler();
 232                         if (vehicleHandler != null) {
 233                             logger.debug("Querying the vehicle: VIN {}", vehicle.vin);
 234                             String vehicleJSON = gson.toJson(vehicle);
 235                             vehicleHandler.parseAndUpdate("queryVehicle", null, vehicleJSON);
 236                             logger.trace("Vehicle is id {}/vehicle_id {}/tokens {}", vehicle.id, vehicle.vehicle_id,
 237                                     vehicle.tokens);
 238                         }
 239                     }
 240                 }
 241             }
 242             return vehicleArray;
 243         } else {
 244             return new Vehicle[0];
 245         }
 246     }
 247
 248     private String getStorageKey() {
 249         return this.getThing().getUID().getId();
 250     }
 251
 252     private ThingStatusInfo authenticate() {
 253         TokenResponse token = logonToken;
 254
 255         boolean hasExpired = true;
 256
 257         if (token != null) {
 258             Instant tokenCreationInstant = Instant.ofEpochMilli(token.created_at * 1000);
 259             logger.debug("Found a request token created at {}", dateFormatter.format(tokenCreationInstant));
 260             Instant tokenExpiresInstant = Instant.ofEpochMilli(token.created_at * 1000 + 60 * token.expires_in);
 261
 262             if (tokenExpiresInstant.isBefore(Instant.now())) {
 263                 logger.debug("The token has expired at {}", dateFormatter.format(tokenExpiresInstant));
 264                 hasExpired = true;
 265             } else {
 266                 hasExpired = false;
 267             }
 268         }
 269
 270         if (hasExpired) {
 271             String username = (String) getConfig().get(CONFIG_USERNAME);
 272             String password = (String) getConfig().get(CONFIG_PASSWORD);
 273             String refreshToken = (String) getConfig().get(CONFIG_REFRESHTOKEN);
 274
 275             if (refreshToken == null || refreshToken.isEmpty()) {
 276                 if (username != null && !username.isEmpty() && password != null && !password.isEmpty()) {
 277                     try {
 278                         refreshToken = ssoHandler.authenticate(username, password);
 279                     } catch (Exception e) {
 280                         logger.error("An exception occurred while obtaining refresh token with username/password: '{}'",
 281                                 e.getMessage());
 282                     }
 283
 284                     if (refreshToken != null) {
 285                         // store refresh token from SSO endpoint in config, clear the password
 286                         Configuration cfg = editConfiguration();
 287                         cfg.put(TeslaBindingConstants.CONFIG_REFRESHTOKEN, refreshToken);
 288                         cfg.remove(TeslaBindingConstants.CONFIG_PASSWORD);
 289                         updateConfiguration(cfg);
 290                     } else {
 291                         return new ThingStatusInfo(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 292                                 "Failed to obtain refresh token with username/password.");
 293                     }
 294                 } else {
 295                     return new ThingStatusInfo(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 296                             "Neither a refresh token nor credentials are provided.");
 297                 }
 298             }
 299
 300             this.logonToken = ssoHandler.getAccessToken(refreshToken);
 301             if (this.logonToken == null) {
 302                 return new ThingStatusInfo(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 303                         "Failed to obtain access token for API.");
 304             }
 305         }
 306
 307         return new ThingStatusInfo(ThingStatus.ONLINE, ThingStatusDetail.NONE, null);
 308     }
 309
 310     protected String invokeAndParse(String vehicleId, String command, String payLoad, WebTarget target) {
 311         logger.debug("Invoking: {}", command);
 312
 313         if (vehicleId != null) {
 314             Response response;
 315
 316             if (payLoad != null) {
 317                 if (command != null) {
 318                     response = target.resolveTemplate("cmd", command).resolveTemplate("vid", vehicleId).request()
 319                             .header("Authorization", "Bearer " + logonToken.access_token)
 320                             .post(Entity.entity(payLoad, MediaType.APPLICATION_JSON_TYPE));
 321                 } else {
 322                     response = target.resolveTemplate("vid", vehicleId).request()
 323                             .header("Authorization", "Bearer " + logonToken.access_token)
 324                             .post(Entity.entity(payLoad, MediaType.APPLICATION_JSON_TYPE));
 325                 }
 326             } else {
 327                 if (command != null) {
 328                     response = target.resolveTemplate("cmd", command).resolveTemplate("vid", vehicleId)
 329                             .request(MediaType.APPLICATION_JSON_TYPE)
 330                             .header("Authorization", "Bearer " + logonToken.access_token).get();
 331                 } else {
 332                     response = target.resolveTemplate("vid", vehicleId).request(MediaType.APPLICATION_JSON_TYPE)
 333                             .header("Authorization", "Bearer " + logonToken.access_token).get();
 334                 }
 335             }
 336
 337             if (!checkResponse(response, false)) {
 338                 logger.debug("An error occurred while communicating with the vehicle during request {}: {}:{}", command,
 339                         (response != null) ? response.getStatus() : "",
 340                         (response != null) ? response.getStatusInfo() : "No Response");
 341                 return null;
 342             }
 343
 344             try {
 345                 JsonObject jsonObject = JsonParser.parseString(response.readEntity(String.class)).getAsJsonObject();
 346                 logger.trace("Request : {}:{}:{} yields {}", command, payLoad, target, jsonObject.get("response"));
 347                 return jsonObject.get("response").toString();
 348             } catch (Exception e) {
 349                 logger.error("An exception occurred while invoking a REST request: '{}'", e.getMessage());
 350             }
 351         }
 352
 353         return null;
 354     }
 355
 356     protected Runnable connectRunnable = () -> {
 357         try {
 358             lock.lock();
 359
 360             ThingStatusInfo status = getThing().getStatusInfo();
 361             if (status.getStatus() != ThingStatus.ONLINE
 362                     && status.getStatusDetail() != ThingStatusDetail.CONFIGURATION_ERROR) {
 363                 logger.debug("Setting up an authenticated connection to the Tesla back-end");
 364
 365                 ThingStatusInfo authenticationResult = authenticate();
 366                 updateStatus(authenticationResult.getStatus(), authenticationResult.getStatusDetail(),
 367                         authenticationResult.getDescription());
 368
 369                 if (authenticationResult.getStatus() == ThingStatus.ONLINE) {
 370                     // get a list of vehicles
 371                     Response response = vehiclesTarget.request(MediaType.APPLICATION_JSON_TYPE)
 372                             .header("Authorization", "Bearer " + logonToken.access_token).get();
 373
 374                     if (response != null && response.getStatus() == 200 && response.hasEntity()) {
 375                         updateStatus(ThingStatus.ONLINE);
 376                         for (Vehicle vehicle : queryVehicles()) {
 377                             Bridge bridge = getBridge();
 378                             if (bridge != null) {
 379                                 List<Thing> things = bridge.getThings();
 380                                 for (int i = 0; i < things.size(); i++) {
 381                                     Thing thing = things.get(i);
 382                                     TeslaVehicleHandler handler = (TeslaVehicleHandler) thing.getHandler();
 383                                     if (handler != null) {
 384                                         if (vehicle.vin.equals(thing.getConfiguration().get(VIN))) {
 385                                             logger.debug(
 386                                                     "Found the vehicle with VIN '{}' in the list of vehicles you own",
 387                                                     getConfig().get(VIN));
 388                                             apiIntervalErrors = 0;
 389                                             apiIntervalTimestamp = System.currentTimeMillis();
 390                                         } else {
 391                                             logger.warn(
 392                                                     "Unable to find the vehicle with VIN '{}' in the list of vehicles you own",
 393                                                     getConfig().get(VIN));
 394                                             handler.updateStatus(ThingStatus.OFFLINE,
 395                                                     ThingStatusDetail.CONFIGURATION_ERROR,
 396                                                     "Vin is not available through this account.");
 397                                         }
 398                                     }
 399                                 }
 400                             }
 401                         }
 402                     } else {
 403                         if (response != null) {
 404                             logger.error("Error fetching the list of vehicles : {}:{}", response.getStatus(),
 405                                     response.getStatusInfo());
 406                             updateStatus(ThingStatus.OFFLINE);
 407                         }
 408                     }
 409                 } else if (authenticationResult.getStatusDetail() == ThingStatusDetail.CONFIGURATION_ERROR) {
 410                     // make sure to set thing to CONFIGURATION_ERROR in case of failed authentication in order not to
 411                     // hit request limit on retries on the Tesla SSO endpoints.
 412                     updateStatus(ThingStatus.OFFLINE, authenticationResult.getStatusDetail());
 413                 }
 414
 415             }
 416         } catch (Exception e) {
 417             logger.error("An exception occurred while connecting to the Tesla back-end: '{}'", e.getMessage(), e);
 418         } finally {
 419             lock.unlock();
 420         }
 421     };
 422
 423     public static class Authenticator implements ClientRequestFilter {
 424         private final String user;
 425         private final String password;
 426
 427         public Authenticator(String user, String password) {
 428             this.user = user;
 429             this.password = password;
 430         }
 431
 432         @Override
 433         public void filter(ClientRequestContext requestContext) throws IOException {
 434             MultivaluedMap<String, Object> headers = requestContext.getHeaders();
 435             final String basicAuthentication = getBasicAuthentication();
 436             headers.add("Authorization", basicAuthentication);
 437         }
 438
 439         private String getBasicAuthentication() {
 440             String token = this.user + ":" + this.password;
 441             return "Basic " + Base64.getEncoder().encodeToString(token.getBytes(StandardCharsets.UTF_8));
 442         }
 443     }
 444
 445     protected class Request implements Runnable {
 446
 447         private TeslaVehicleHandler handler;
 448         private String request;
 449         private String payLoad;
 450         private WebTarget target;
 451
 452         public Request(TeslaVehicleHandler handler, String request, String payLoad, WebTarget target) {
 453             this.handler = handler;
 454             this.request = request;
 455             this.payLoad = payLoad;
 456             this.target = target;
 457         }
 458
 459         @Override
 460         public void run() {
 461             try {
 462                 String result = "";
 463
 464                 if (getThing().getStatus() == ThingStatus.ONLINE) {
 465                     result = invokeAndParse(handler.getVehicleId(), request, payLoad, target);
 466                     if (result != null && !"".equals(result)) {
 467                         handler.parseAndUpdate(request, payLoad, result);
 468                     }
 469                 }
 470             } catch (Exception e) {
 471                 logger.error("An exception occurred while executing a request to the vehicle: '{}'", e.getMessage(), e);
 472             }
 473         }
 474     }
 475
 476     public Request newRequest(TeslaVehicleHandler teslaVehicleHandler, String command, String payLoad,
 477             WebTarget target) {
 478         return new Request(teslaVehicleHandler, command, payLoad, target);
 479     }
 480
 481     @Override
 482     public Collection<Class<? extends ThingHandlerService>> getServices() {
 483         return Collections.singletonList(TeslaVehicleDiscoveryService.class);
 484     }
 485 }