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   1 /**
   2  * Copyright (c) 2010-2020 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.deconz.internal.handler;
  14
  15 import static org.openhab.binding.deconz.internal.BindingConstants.*;
  16 import static org.openhab.binding.deconz.internal.Util.buildUrl;
  17
  18 import java.net.SocketTimeoutException;
  19 import java.util.Collection;
  20 import java.util.Collections;
  21 import java.util.Map;
  22 import java.util.Set;
  23 import java.util.concurrent.CompletableFuture;
  24 import java.util.concurrent.CompletionException;
  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.openhab.binding.deconz.internal.discovery.ThingDiscoveryService;
  32 import org.openhab.binding.deconz.internal.dto.ApiKeyMessage;
  33 import org.openhab.binding.deconz.internal.dto.BridgeFullState;
  34 import org.openhab.binding.deconz.internal.netutils.AsyncHttpClient;
  35 import org.openhab.binding.deconz.internal.netutils.WebSocketConnection;
  36 import org.openhab.binding.deconz.internal.netutils.WebSocketConnectionListener;
  37 import org.openhab.core.config.core.Configuration;
  38 import org.openhab.core.io.net.http.WebSocketFactory;
  39 import org.openhab.core.thing.Bridge;
  40 import org.openhab.core.thing.ChannelUID;
  41 import org.openhab.core.thing.ThingStatus;
  42 import org.openhab.core.thing.ThingStatusDetail;
  43 import org.openhab.core.thing.ThingTypeUID;
  44 import org.openhab.core.thing.binding.BaseBridgeHandler;
  45 import org.openhab.core.thing.binding.ThingHandlerService;
  46 import org.openhab.core.types.Command;
  47 import org.slf4j.Logger;
  48 import org.slf4j.LoggerFactory;
  49
  50 import com.google.gson.Gson;
  51
  52 /**
  53  * The bridge Thing is responsible for requesting all available sensors and switches and propagate
  54  * them to the discovery service.
  55  *
  56  * It performs the authorization process if necessary.
  57  *
  58  * A websocket connection is established to the deCONZ software and kept alive.
  59  *
  60  * @author David Graeff - Initial contribution
  61  */
  62 @NonNullByDefault
  63 public class DeconzBridgeHandler extends BaseBridgeHandler implements WebSocketConnectionListener {
  64     public static final Set<ThingTypeUID> SUPPORTED_THING_TYPES = Collections.singleton(BRIDGE_TYPE);
  65
  66     private final Logger logger = LoggerFactory.getLogger(DeconzBridgeHandler.class);
  67     private @Nullable ThingDiscoveryService thingDiscoveryService;
  68     private final WebSocketConnection websocket;
  69     private final AsyncHttpClient http;
  70     private DeconzBridgeConfig config = new DeconzBridgeConfig();
  71     private final Gson gson;
  72     private @Nullable ScheduledFuture<?> scheduledFuture;
  73     private int websocketPort = 0;
  74     /** Prevent a dispose/init cycle while this flag is set. Use for property updates */
  75     private boolean ignoreConfigurationUpdate;
  76     private boolean websocketReconnect = false;
  77
  78     /** The poll frequency for the API Key verification */
  79     private static final int POLL_FREQUENCY_SEC = 10;
  80
  81     public DeconzBridgeHandler(Bridge thing, WebSocketFactory webSocketFactory, AsyncHttpClient http, Gson gson) {
  82         super(thing);
  83         this.http = http;
  84         this.gson = gson;
  85         String websocketID = thing.getUID().getAsString().replace(':', '-');
  86         websocketID = websocketID.length() < 3 ? websocketID : websocketID.substring(websocketID.length() - 20);
  87         this.websocket = new WebSocketConnection(this, webSocketFactory.createWebSocketClient(websocketID), gson);
  88     }
  89
  90     @Override
  91     public Collection<Class<? extends ThingHandlerService>> getServices() {
  92         return Collections.singleton(ThingDiscoveryService.class);
  93     }
  94
  95     @Override
  96     public void handleConfigurationUpdate(Map<String, Object> configurationParameters) {
  97         if (!ignoreConfigurationUpdate) {
  98             super.handleConfigurationUpdate(configurationParameters);
  99         }
 100     }
 101
 102     @Override
 103     public void handleCommand(ChannelUID channelUID, Command command) {
 104     }
 105
 106     /**
 107      * Stops the API request or websocket reconnect timer
 108      */
 109     private void stopTimer() {
 110         ScheduledFuture<?> future = scheduledFuture;
 111         if (future != null) {
 112             future.cancel(true);
 113             scheduledFuture = null;
 114         }
 115     }
 116
 117     /**
 118      * Parses the response message to the API key generation REST API.
 119      *
 120      * @param r The response
 121      */
 122     private void parseAPIKeyResponse(AsyncHttpClient.Result r) {
 123         if (r.getResponseCode() == 403) {
 124             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_PENDING,
 125                     "Allow authentification for 3rd party apps. Trying again in " + POLL_FREQUENCY_SEC + " seconds");
 126             stopTimer();
 127             scheduledFuture = scheduler.schedule(() -> requestApiKey(), POLL_FREQUENCY_SEC, TimeUnit.SECONDS);
 128         } else if (r.getResponseCode() == 200) {
 129             ApiKeyMessage[] response = gson.fromJson(r.getBody(), ApiKeyMessage[].class);
 130             if (response.length == 0) {
 131                 throw new IllegalStateException("Authorisation request response is empty");
 132             }
 133             config.apikey = response[0].success.username;
 134             Configuration configuration = editConfiguration();
 135             configuration.put(CONFIG_APIKEY, config.apikey);
 136             updateConfiguration(configuration);
 137             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_PENDING, "Waiting for configuration");
 138             requestFullState();
 139         } else {
 140             throw new IllegalStateException("Unknown status code for authorisation request");
 141         }
 142     }
 143
 144     /**
 145      * Parses the response message to the REST API for retrieving the full bridge state with all sensors and switches
 146      * and configuration.
 147      *
 148      * @param r The response
 149      */
 150     private @Nullable BridgeFullState parseBridgeFullStateResponse(AsyncHttpClient.Result r) {
 151         if (r.getResponseCode() == 403) {
 152             return null;
 153         } else if (r.getResponseCode() == 200) {
 154             return gson.fromJson(r.getBody(), BridgeFullState.class);
 155         } else {
 156             throw new IllegalStateException("Unknown status code for full state request");
 157         }
 158     }
 159
 160     /**
 161      * Perform a request to the REST API for retrieving the full bridge state with all sensors and switches
 162      * and configuration.
 163      */
 164     public void requestFullState() {
 165         if (config.apikey == null) {
 166             return;
 167         }
 168         String url = buildUrl(config.getHostWithoutPort(), config.httpPort, config.apikey);
 169         http.get(url, config.timeout).thenApply(this::parseBridgeFullStateResponse).exceptionally(e -> {
 170             if (e instanceof SocketTimeoutException || e instanceof TimeoutException
 171                     || e instanceof CompletionException) {
 172                 logger.debug("Get full state failed", e);
 173             } else {
 174                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 175             }
 176             return null;
 177         }).whenComplete((value, error) -> {
 178             final ThingDiscoveryService thingDiscoveryService = this.thingDiscoveryService;
 179             if (thingDiscoveryService != null) {
 180                 // Hand over sensors to discovery service
 181                 thingDiscoveryService.stateRequestFinished(value);
 182             }
 183         }).thenAccept(fullState -> {
 184             if (fullState == null) {
 185                 return;
 186             }
 187             if (fullState.config.name.isEmpty()) {
 188                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.NONE,
 189                         "You are connected to a HUE bridge, not a deCONZ software!");
 190                 return;
 191             }
 192             if (fullState.config.websocketport == 0) {
 193                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.NONE,
 194                         "deCONZ software too old. No websocket support!");
 195                 return;
 196             }
 197
 198             // Add some information about the bridge
 199             Map<String, String> editProperties = editProperties();
 200             editProperties.put("apiversion", fullState.config.apiversion);
 201             editProperties.put("swversion", fullState.config.swversion);
 202             editProperties.put("fwversion", fullState.config.fwversion);
 203             editProperties.put("uuid", fullState.config.uuid);
 204             editProperties.put("zigbeechannel", String.valueOf(fullState.config.zigbeechannel));
 205             editProperties.put("ipaddress", fullState.config.ipaddress);
 206             ignoreConfigurationUpdate = true;
 207             updateProperties(editProperties);
 208             ignoreConfigurationUpdate = false;
 209
 210             // Use requested websocket port if no specific port is given
 211             websocketPort = config.port == 0 ? fullState.config.websocketport : config.port;
 212             websocketReconnect = true;
 213             startWebsocket();
 214         }).exceptionally(e -> {
 215             if (e != null) {
 216                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.NONE, e.getMessage());
 217             } else {
 218                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.NONE);
 219             }
 220             logger.warn("Full state parsing failed", e);
 221             return null;
 222         });
 223     }
 224
 225     /**
 226      * Starts the websocket connection.
 227      * {@link #requestFullState} need to be called first to obtain the websocket port.
 228      */
 229     private void startWebsocket() {
 230         if (websocket.isConnected() || websocketPort == 0) {
 231             return;
 232         }
 233
 234         stopTimer();
 235         scheduledFuture = scheduler.schedule(this::startWebsocket, POLL_FREQUENCY_SEC, TimeUnit.SECONDS);
 236
 237         websocket.start(config.getHostWithoutPort() + ":" + websocketPort);
 238     }
 239
 240     /**
 241      * Perform a request to the REST API for generating an API key.
 242      *
 243      */
 244     private CompletableFuture<?> requestApiKey() {
 245         updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_PENDING, "Requesting API Key");
 246         stopTimer();
 247         String url = buildUrl(config.getHostWithoutPort(), config.httpPort);
 248         return http.post(url, "{\"devicetype\":\"openHAB\"}", config.timeout).thenAccept(this::parseAPIKeyResponse)
 249                 .exceptionally(e -> {
 250                     updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 251                     logger.warn("Authorisation failed", e);
 252                     return null;
 253                 });
 254     }
 255
 256     @Override
 257     public void initialize() {
 258         logger.debug("Start initializing!");
 259         config = getConfigAs(DeconzBridgeConfig.class);
 260         if (config.apikey == null) {
 261             requestApiKey();
 262         } else {
 263             requestFullState();
 264         }
 265     }
 266
 267     @Override
 268     public void dispose() {
 269         websocketReconnect = false;
 270         stopTimer();
 271         websocket.close();
 272     }
 273
 274     @Override
 275     public void connectionError(@Nullable Throwable e) {
 276         if (e != null) {
 277             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 278         } else {
 279             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "Unknown reason");
 280         }
 281         stopTimer();
 282         // Wait for POLL_FREQUENCY_SEC after a connection error before trying again
 283         if (websocketReconnect) {
 284             scheduledFuture = scheduler.schedule(this::startWebsocket, POLL_FREQUENCY_SEC, TimeUnit.SECONDS);
 285         }
 286     }
 287
 288     @Override
 289     public void connectionEstablished() {
 290         stopTimer();
 291         updateStatus(ThingStatus.ONLINE);
 292     }
 293
 294     @Override
 295     public void connectionLost(String reason) {
 296         updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, reason);
 297         if (websocketReconnect) {
 298             startWebsocket();
 299         }
 300     }
 301
 302     /**
 303      * Return the websocket connection.
 304      */
 305     public WebSocketConnection getWebsocketConnection() {
 306         return websocket;
 307     }
 308
 309     /**
 310      * Return the http connection.
 311      */
 312     public AsyncHttpClient getHttp() {
 313         return http;
 314     }
 315
 316     /**
 317      * Return the bridge configuration.
 318      */
 319     public DeconzBridgeConfig getBridgeConfig() {
 320         return config;
 321     }
 322
 323     /**
 324      * Called by the {@link ThingDiscoveryService}. Informs the bridge handler about the service.
 325      *
 326      * @param thingDiscoveryService The service
 327      */
 328     public void setDiscoveryService(ThingDiscoveryService thingDiscoveryService) {
 329         this.thingDiscoveryService = thingDiscoveryService;
 330     }
 331 }