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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.gardena.internal;
  14
  15 import java.util.ArrayList;
  16 import java.util.Collection;
  17 import java.util.HashMap;
  18 import java.util.Iterator;
  19 import java.util.List;
  20 import java.util.Map;
  21 import java.util.Set;
  22 import java.util.concurrent.ConcurrentHashMap;
  23 import java.util.concurrent.ExecutionException;
  24 import java.util.concurrent.ScheduledExecutorService;
  25 import java.util.concurrent.ScheduledFuture;
  26 import java.util.concurrent.TimeUnit;
  27 import java.util.concurrent.TimeoutException;
  28
  29 import org.eclipse.jdt.annotation.NonNullByDefault;
  30 import org.eclipse.jdt.annotation.Nullable;
  31 import org.eclipse.jetty.client.HttpClient;
  32 import org.eclipse.jetty.client.api.ContentResponse;
  33 import org.eclipse.jetty.client.api.Request;
  34 import org.eclipse.jetty.client.util.AbstractTypedContentProvider;
  35 import org.eclipse.jetty.client.util.FormContentProvider;
  36 import org.eclipse.jetty.client.util.StringContentProvider;
  37 import org.eclipse.jetty.http.HttpHeader;
  38 import org.eclipse.jetty.http.HttpMethod;
  39 import org.eclipse.jetty.util.Fields;
  40 import org.eclipse.jetty.websocket.client.WebSocketClient;
  41 import org.openhab.binding.gardena.internal.config.GardenaConfig;
  42 import org.openhab.binding.gardena.internal.exception.GardenaDeviceNotFoundException;
  43 import org.openhab.binding.gardena.internal.exception.GardenaException;
  44 import org.openhab.binding.gardena.internal.model.DataItemDeserializer;
  45 import org.openhab.binding.gardena.internal.model.dto.Device;
  46 import org.openhab.binding.gardena.internal.model.dto.api.CreateWebSocketRequest;
  47 import org.openhab.binding.gardena.internal.model.dto.api.DataItem;
  48 import org.openhab.binding.gardena.internal.model.dto.api.Location;
  49 import org.openhab.binding.gardena.internal.model.dto.api.LocationDataItem;
  50 import org.openhab.binding.gardena.internal.model.dto.api.LocationResponse;
  51 import org.openhab.binding.gardena.internal.model.dto.api.LocationsResponse;
  52 import org.openhab.binding.gardena.internal.model.dto.api.PostOAuth2Response;
  53 import org.openhab.binding.gardena.internal.model.dto.api.WebSocket;
  54 import org.openhab.binding.gardena.internal.model.dto.api.WebSocketCreatedResponse;
  55 import org.openhab.binding.gardena.internal.model.dto.command.GardenaCommand;
  56 import org.openhab.binding.gardena.internal.model.dto.command.GardenaCommandRequest;
  57 import org.openhab.core.io.net.http.HttpClientFactory;
  58 import org.openhab.core.io.net.http.WebSocketFactory;
  59 import org.openhab.core.thing.ThingUID;
  60 import org.openhab.core.thing.util.ThingWebClientUtil;
  61 import org.slf4j.Logger;
  62 import org.slf4j.LoggerFactory;
  63
  64 import com.google.gson.Gson;
  65 import com.google.gson.GsonBuilder;
  66 import com.google.gson.JsonSyntaxException;
  67
  68 /**
  69  * {@link GardenaSmart} implementation to access Gardena smart system.
  70  *
  71  * @author Gerhard Riegler - Initial contribution
  72  */
  73 @NonNullByDefault
  74 public class GardenaSmartImpl implements GardenaSmart, GardenaSmartWebSocketListener {
  75     private final Logger logger = LoggerFactory.getLogger(GardenaSmartImpl.class);
  76
  77     private Gson gson = new GsonBuilder().registerTypeAdapter(DataItem.class, new DataItemDeserializer()).create();
  78
  79     private static final String URL_API_HUSQUARNA = "https://api.authentication.husqvarnagroup.dev/v1";
  80     private static final String URL_API_GARDENA = "https://api.smart.gardena.dev/v1";
  81     private static final String URL_API_TOKEN = URL_API_HUSQUARNA + "/oauth2/token";
  82     private static final String URL_API_WEBSOCKET = URL_API_GARDENA + "/websocket";
  83     private static final String URL_API_LOCATIONS = URL_API_GARDENA + "/locations";
  84     private static final String URL_API_COMMAND = URL_API_GARDENA + "/command";
  85
  86     private final String id;
  87     private final GardenaConfig config;
  88     private final ScheduledExecutorService scheduler;
  89
  90     private final Map<String, Device> allDevicesById = new HashMap<>();
  91     private @Nullable LocationsResponse locationsResponse = null;
  92     private final GardenaSmartEventListener eventListener;
  93
  94     private final HttpClient httpClient;
  95     private final Map<String, GardenaSmartWebSocket> webSockets = new HashMap<>();
  96     private @Nullable PostOAuth2Response token;
  97     private boolean initialized = false;
  98     private final WebSocketClient webSocketClient;
  99
 100     private final Set<Device> devicesToNotify = ConcurrentHashMap.newKeySet();
 101     private final Object deviceUpdateTaskLock = new Object();
 102     private @Nullable ScheduledFuture<?> deviceUpdateTask;
 103     private final Object newDeviceTasksLock = new Object();
 104     private final List<ScheduledFuture<?>> newDeviceTasks = new ArrayList<>();
 105
 106     public GardenaSmartImpl(ThingUID uid, GardenaConfig config, GardenaSmartEventListener eventListener,
 107             ScheduledExecutorService scheduler, HttpClientFactory httpClientFactory, WebSocketFactory webSocketFactory)
 108             throws GardenaException {
 109         this.id = uid.getId();
 110         this.config = config;
 111         this.eventListener = eventListener;
 112         this.scheduler = scheduler;
 113
 114         String name = ThingWebClientUtil.buildWebClientConsumerName(uid, null);
 115         httpClient = httpClientFactory.createHttpClient(name);
 116         httpClient.setConnectTimeout(config.getConnectionTimeout() * 1000L);
 117         httpClient.setIdleTimeout(httpClient.getConnectTimeout());
 118
 119         name = ThingWebClientUtil.buildWebClientConsumerName(uid, "ws-");
 120         webSocketClient = webSocketFactory.createWebSocketClient(name);
 121         webSocketClient.setConnectTimeout(config.getConnectionTimeout() * 1000L);
 122         webSocketClient.setStopTimeout(3000);
 123         webSocketClient.setMaxIdleTimeout(150000);
 124
 125         logger.debug("Starting GardenaSmart");
 126         try {
 127             httpClient.start();
 128             webSocketClient.start();
 129
 130             // initially load access token
 131             verifyToken();
 132             LocationsResponse locationsResponse = loadLocations();
 133             this.locationsResponse = locationsResponse;
 134
 135             // assemble devices
 136             if (locationsResponse.data != null) {
 137                 for (LocationDataItem location : locationsResponse.data) {
 138                     LocationResponse locationResponse = loadLocation(location.id);
 139                     if (locationResponse.included != null) {
 140                         for (DataItem<?> dataItem : locationResponse.included) {
 141                             handleDataItem(dataItem);
 142                         }
 143                     }
 144                 }
 145             }
 146
 147             for (Device device : allDevicesById.values()) {
 148                 device.evaluateDeviceType();
 149             }
 150
 151             startWebsockets();
 152             initialized = true;
 153         } catch (GardenaException ex) {
 154             dispose();
 155             // pass GardenaException to calling function
 156             throw ex;
 157         } catch (Exception ex) {
 158             dispose();
 159             throw new GardenaException(ex.getMessage(), ex);
 160         }
 161     }
 162
 163     /**
 164      * Starts the websockets for each location.
 165      */
 166     private void startWebsockets() throws Exception {
 167         LocationsResponse locationsResponse = this.locationsResponse;
 168         if (locationsResponse != null) {
 169             for (LocationDataItem location : locationsResponse.data) {
 170                 WebSocketCreatedResponse webSocketCreatedResponse = getWebsocketInfo(location.id);
 171                 Location locationAttributes = location.attributes;
 172                 WebSocket webSocketAttributes = webSocketCreatedResponse.data.attributes;
 173                 if (locationAttributes == null || webSocketAttributes == null) {
 174                     continue;
 175                 }
 176                 String socketId = id + "-" + locationAttributes.name;
 177                 webSockets.put(location.id, new GardenaSmartWebSocket(this, webSocketClient, scheduler,
 178                         webSocketAttributes.url, token, socketId, location.id));
 179             }
 180         }
 181     }
 182
 183     /**
 184      * Stops all websockets.
 185      */
 186     private void stopWebsockets() {
 187         for (GardenaSmartWebSocket webSocket : webSockets.values()) {
 188             webSocket.stop();
 189         }
 190         webSockets.clear();
 191     }
 192
 193     /**
 194      * Communicates with Gardena smart home system and parses the result.
 195      */
 196     private <T> T executeRequest(HttpMethod method, String url, @Nullable Object content, @Nullable Class<T> result)
 197             throws GardenaException {
 198         try {
 199             AbstractTypedContentProvider contentProvider = null;
 200             String contentType = "application/vnd.api+json";
 201             if (content != null) {
 202                 if (content instanceof Fields) {
 203                     contentProvider = new FormContentProvider((Fields) content);
 204                     contentType = "application/x-www-form-urlencoded";
 205                 } else {
 206                     contentProvider = new StringContentProvider(gson.toJson(content));
 207                 }
 208             }
 209
 210             if (logger.isTraceEnabled()) {
 211                 logger.trace(">>> {} {}, data: {}", method, url, content == null ? null : gson.toJson(content));
 212             }
 213
 214             Request request = httpClient.newRequest(url).method(method).header(HttpHeader.CONTENT_TYPE, contentType)
 215                     .header(HttpHeader.ACCEPT, "application/vnd.api+json").header(HttpHeader.ACCEPT_ENCODING, "gzip");
 216
 217             if (!URL_API_TOKEN.equals(url)) {
 218                 verifyToken();
 219                 final PostOAuth2Response token = this.token;
 220                 if (token != null) {
 221                     request.header("Authorization", token.tokenType + " " + token.accessToken);
 222                 }
 223                 request.header("X-Api-Key", config.getApiKey());
 224             }
 225
 226             request.content(contentProvider);
 227             ContentResponse contentResponse = request.send();
 228             int status = contentResponse.getStatus();
 229             if (logger.isTraceEnabled()) {
 230                 logger.trace("<<< status:{}, {}", status, contentResponse.getContentAsString());
 231             }
 232
 233             if (status != 200 && status != 204 && status != 201 && status != 202) {
 234                 throw new GardenaException(String.format("Error %s %s, %s", status, contentResponse.getReason(),
 235                         contentResponse.getContentAsString()), status);
 236             }
 237
 238             if (result == null) {
 239                 return (T) null;
 240             }
 241             return (T) gson.fromJson(contentResponse.getContentAsString(), result);
 242         } catch (InterruptedException | TimeoutException | ExecutionException ex) {
 243             throw new GardenaException(ex.getMessage(), ex);
 244         }
 245     }
 246
 247     /**
 248      * Creates or refreshes the access token for the Gardena smart system.
 249      */
 250     private synchronized void verifyToken() throws GardenaException {
 251         Fields fields = new Fields();
 252         fields.add("client_id", config.getApiKey());
 253
 254         PostOAuth2Response token = this.token;
 255         if (token == null || token.isRefreshTokenExpired()) {
 256             // new token
 257             logger.debug("Gardena API login using apiSecret, reason: {}",
 258                     token == null ? "no token available" : "refresh token expired");
 259             fields.add("grant_type", "client_credentials");
 260             fields.add("client_secret", config.getApiSecret());
 261             token = executeRequest(HttpMethod.POST, URL_API_TOKEN, fields, PostOAuth2Response.class);
 262             token.postProcess();
 263             this.token = token;
 264         } else if (token.isAccessTokenExpired()) {
 265             // refresh token
 266             logger.debug("Gardena API login using refreshToken, reason: access token expired");
 267             fields.add("grant_type", "refresh_token");
 268             fields.add("refresh_token", token.refreshToken);
 269             try {
 270                 PostOAuth2Response tempToken = executeRequest(HttpMethod.POST, URL_API_TOKEN, fields,
 271                         PostOAuth2Response.class);
 272                 token.accessToken = tempToken.accessToken;
 273                 token.expiresIn = tempToken.expiresIn;
 274                 token.postProcess();
 275                 this.token = token;
 276             } catch (GardenaException ex) {
 277                 // refresh token issue
 278                 this.token = null;
 279                 verifyToken();
 280             }
 281         } else {
 282             logger.debug("Gardena API token valid");
 283         }
 284         logger.debug("{}", token.toString());
 285     }
 286
 287     /**
 288      * Loads all locations.
 289      */
 290     private LocationsResponse loadLocations() throws GardenaException {
 291         return executeRequest(HttpMethod.GET, URL_API_LOCATIONS, null, LocationsResponse.class);
 292     }
 293
 294     /**
 295      * Loads all devices for a given location.
 296      */
 297     private LocationResponse loadLocation(String locationId) throws GardenaException {
 298         return executeRequest(HttpMethod.GET, URL_API_LOCATIONS + "/" + locationId, null, LocationResponse.class);
 299     }
 300
 301     /**
 302      * Returns the websocket url for a given location.
 303      */
 304     private WebSocketCreatedResponse getWebsocketInfo(String locationId) throws GardenaException {
 305         return executeRequest(HttpMethod.POST, URL_API_WEBSOCKET, new CreateWebSocketRequest(locationId),
 306                 WebSocketCreatedResponse.class);
 307     }
 308
 309     /**
 310      * Stops the client.
 311      */
 312     @Override
 313     public void dispose() {
 314         logger.debug("Disposing GardenaSmart");
 315         initialized = false;
 316         synchronized (newDeviceTasksLock) {
 317             for (ScheduledFuture<?> task : newDeviceTasks) {
 318                 if (!task.isDone()) {
 319                     task.cancel(true);
 320                 }
 321             }
 322             newDeviceTasks.clear();
 323         }
 324         synchronized (deviceUpdateTaskLock) {
 325             devicesToNotify.clear();
 326             ScheduledFuture<?> task = deviceUpdateTask;
 327             if (task != null) {
 328                 task.cancel(true);
 329             }
 330             deviceUpdateTask = null;
 331         }
 332         stopWebsockets();
 333         try {
 334             httpClient.stop();
 335             webSocketClient.stop();
 336         } catch (Exception e) {
 337             // ignore
 338         }
 339         httpClient.destroy();
 340         webSocketClient.destroy();
 341         allDevicesById.clear();
 342         locationsResponse = null;
 343     }
 344
 345     /**
 346      * Restarts all websockets.
 347      */
 348     @Override
 349     public synchronized void restartWebsockets() {
 350         logger.debug("Restarting GardenaSmart Webservices");
 351         stopWebsockets();
 352         try {
 353             startWebsockets();
 354         } catch (Exception ex) {
 355             // restart binding
 356             if (logger.isDebugEnabled()) {
 357                 logger.warn("Restarting GardenaSmart Webservices failed! Restarting binding", ex);
 358             } else {
 359                 logger.warn("Restarting GardenaSmart Webservices failed: {}! Restarting binding", ex.getMessage());
 360             }
 361             eventListener.onError();
 362         }
 363     }
 364
 365     /**
 366      * Sets the dataItem from the websocket event into the correct device.
 367      */
 368     private void handleDataItem(final DataItem<?> dataItem) throws GardenaException {
 369         final String deviceId = dataItem.getDeviceId();
 370         Device device = allDevicesById.get(deviceId);
 371         if (device == null && !(dataItem instanceof LocationDataItem)) {
 372             device = new Device(deviceId);
 373             allDevicesById.put(device.id, device);
 374
 375             synchronized (newDeviceTasksLock) {
 376                 // remove prior completed tasks from the list
 377                 newDeviceTasks.removeIf(task -> task.isDone());
 378                 // add a new scheduled task to the list
 379                 newDeviceTasks.add(scheduler.schedule(() -> {
 380                     if (initialized) {
 381                         Device newDevice = allDevicesById.get(deviceId);
 382                         if (newDevice != null) {
 383                             newDevice.evaluateDeviceType();
 384                             if (newDevice.deviceType != null) {
 385                                 eventListener.onNewDevice(newDevice);
 386                             }
 387                         }
 388                     }
 389                 }, 3, TimeUnit.SECONDS));
 390             }
 391         }
 392
 393         if (device != null) {
 394             device.setDataItem(dataItem);
 395         }
 396     }
 397
 398     @Override
 399     public void onWebSocketClose(String id) {
 400         restartWebsocket(webSockets.get(id));
 401     }
 402
 403     @Override
 404     public void onWebSocketError(String id) {
 405         restartWebsocket(webSockets.get(id));
 406     }
 407
 408     private void restartWebsocket(@Nullable GardenaSmartWebSocket socket) {
 409         synchronized (this) {
 410             if (socket != null && !socket.isClosing()) {
 411                 // close socket, if still open
 412                 logger.info("Restarting GardenaSmart Webservice ({})", socket.getSocketID());
 413                 socket.stop();
 414             } else {
 415                 // if socket is already closing, exit function and do not restart socket
 416                 return;
 417             }
 418         }
 419
 420         try {
 421             Thread.sleep(3000);
 422             WebSocketCreatedResponse webSocketCreatedResponse = getWebsocketInfo(socket.getLocationID());
 423             // only restart single socket, do not restart binding
 424             WebSocket webSocketAttributes = webSocketCreatedResponse.data.attributes;
 425             if (webSocketAttributes != null) {
 426                 socket.restart(webSocketAttributes.url);
 427             }
 428         } catch (Exception ex) {
 429             // restart binding on error
 430             logger.warn("Restarting GardenaSmart Webservice failed ({}): {}, restarting binding", socket.getSocketID(),
 431                     ex.getMessage());
 432             eventListener.onError();
 433         }
 434     }
 435
 436     @Override
 437     public void onWebSocketMessage(String msg) {
 438         try {
 439             DataItem<?> dataItem = gson.fromJson(msg, DataItem.class);
 440             if (dataItem != null) {
 441                 handleDataItem(dataItem);
 442                 Device device = allDevicesById.get(dataItem.getDeviceId());
 443                 if (device != null && device.active) {
 444                     synchronized (deviceUpdateTaskLock) {
 445                         devicesToNotify.add(device);
 446
 447                         // delay the deviceUpdated event to filter multiple events for the same device dataItem property
 448                         ScheduledFuture<?> task = this.deviceUpdateTask;
 449                         if (task == null || task.isDone()) {
 450                             deviceUpdateTask = scheduler.schedule(() -> notifyDevicesUpdated(), 1, TimeUnit.SECONDS);
 451                         }
 452                     }
 453                 }
 454             }
 455         } catch (GardenaException | JsonSyntaxException ex) {
 456             logger.warn("Ignoring message: {}", ex.getMessage());
 457         }
 458     }
 459
 460     /**
 461      * Helper scheduler task to update devices
 462      */
 463     private void notifyDevicesUpdated() {
 464         synchronized (deviceUpdateTaskLock) {
 465             if (initialized) {
 466                 Iterator<Device> notifyIterator = devicesToNotify.iterator();
 467                 while (notifyIterator.hasNext()) {
 468                     eventListener.onDeviceUpdated(notifyIterator.next());
 469                     notifyIterator.remove();
 470                 }
 471             }
 472         }
 473     }
 474
 475     @Override
 476     public Device getDevice(String deviceId) throws GardenaDeviceNotFoundException {
 477         Device device = allDevicesById.get(deviceId);
 478         if (device == null) {
 479             throw new GardenaDeviceNotFoundException("Device with id " + deviceId + " not found");
 480         }
 481         return device;
 482     }
 483
 484     @Override
 485     public void sendCommand(DataItem<?> dataItem, GardenaCommand gardenaCommand) throws GardenaException {
 486         executeRequest(HttpMethod.PUT, URL_API_COMMAND + "/" + dataItem.id, new GardenaCommandRequest(gardenaCommand),
 487                 null);
 488     }
 489
 490     @Override
 491     public String getId() {
 492         return id;
 493     }
 494
 495     @Override
 496     public Collection<Device> getAllDevices() {
 497         return allDevicesById.values();
 498     }
 499 }