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   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.groheondus.internal.handler;
  14
  15 import java.io.IOException;
  16 import java.time.Duration;
  17 import java.time.Instant;
  18 import java.util.concurrent.ScheduledFuture;
  19 import java.util.concurrent.TimeUnit;
  20
  21 import javax.security.auth.login.LoginException;
  22
  23 import org.eclipse.jdt.annotation.NonNullByDefault;
  24 import org.eclipse.jdt.annotation.Nullable;
  25 import org.grohe.ondus.api.OndusService;
  26 import org.openhab.binding.groheondus.internal.AccountServlet;
  27 import org.openhab.binding.groheondus.internal.GroheOndusAccountConfiguration;
  28 import org.openhab.core.storage.Storage;
  29 import org.openhab.core.thing.Bridge;
  30 import org.openhab.core.thing.ChannelUID;
  31 import org.openhab.core.thing.ThingStatus;
  32 import org.openhab.core.thing.ThingStatusDetail;
  33 import org.openhab.core.thing.binding.BaseBridgeHandler;
  34 import org.openhab.core.types.Command;
  35 import org.osgi.service.http.HttpService;
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38
  39 /**
  40  * @author Florian Schmidt and Arne Wohlert - Initial contribution
  41  */
  42 @NonNullByDefault
  43 public class GroheOndusAccountHandler extends BaseBridgeHandler {
  44
  45     private static final String STORAGE_KEY_REFRESH_TOKEN = "refreshToken";
  46
  47     private final Logger logger = LoggerFactory.getLogger(GroheOndusAccountHandler.class);
  48
  49     private HttpService httpService;
  50     private Storage<String> storage;
  51     private @Nullable AccountServlet accountServlet;
  52     private @Nullable OndusService ondusService;
  53     private @Nullable ScheduledFuture<?> refreshTokenFuture;
  54
  55     public GroheOndusAccountHandler(Bridge bridge, HttpService httpService, Storage<String> storage) {
  56         super(bridge);
  57         this.httpService = httpService;
  58         this.storage = storage;
  59     }
  60
  61     public OndusService getService() {
  62         OndusService ret = this.ondusService;
  63         if (ret == null) {
  64             throw new IllegalStateException("OndusService requested, which is null (UNINITIALIZED)");
  65         }
  66         return ret;
  67     }
  68
  69     public void deleteRefreshToken() {
  70         this.storage.remove(STORAGE_KEY_REFRESH_TOKEN);
  71         this.initialize();
  72
  73         if (refreshTokenFuture != null) {
  74             refreshTokenFuture.cancel(true);
  75         }
  76     }
  77
  78     public void setRefreshToken(String refreshToken) {
  79         this.storage.put(STORAGE_KEY_REFRESH_TOKEN, refreshToken);
  80         this.initialize();
  81     }
  82
  83     private void scheduleTokenRefresh() {
  84         if (ondusService != null) {
  85             Instant expiresAt = ondusService.authorizationExpiresAt();
  86             Duration between = Duration.between(Instant.now(), expiresAt);
  87             refreshTokenFuture = scheduler.schedule(() -> {
  88                 OndusService ondusService = this.ondusService;
  89                 if (ondusService == null) {
  90                     logger.warn("Trying to refresh Ondus account without a service being present.");
  91                     return;
  92                 }
  93                 try {
  94                     setRefreshToken(ondusService.refreshAuthorization());
  95                 } catch (Exception e) {
  96                     logger.warn("Could not refresh authorization for GROHE ONDUS account", e);
  97                 }
  98             }, between.getSeconds(), TimeUnit.SECONDS);
  99         }
 100     }
 101
 102     public boolean hasRefreshToken() {
 103         return this.storage.containsKey(STORAGE_KEY_REFRESH_TOKEN);
 104     }
 105
 106     @Override
 107     public void handleCommand(ChannelUID channelUID, Command command) {
 108         // Nothing to do for bridge
 109     }
 110
 111     @Override
 112     public void dispose() {
 113         super.dispose();
 114         if (ondusService != null) {
 115             ondusService = null;
 116         }
 117         if (accountServlet != null) {
 118             accountServlet.dispose();
 119         }
 120         if (refreshTokenFuture != null) {
 121             refreshTokenFuture.cancel(true);
 122         }
 123     }
 124
 125     @Override
 126     public void initialize() {
 127         GroheOndusAccountConfiguration config = getConfigAs(GroheOndusAccountConfiguration.class);
 128
 129         if (this.accountServlet == null) {
 130             this.accountServlet = new AccountServlet(httpService, this.getThing().getUID().getId(), this);
 131         }
 132
 133         if ((config.username == null || config.password == null) && !this.hasRefreshToken()) {
 134             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_PENDING,
 135                     "Need username/password or refreshToken");
 136             return;
 137         }
 138
 139         updateStatus(ThingStatus.UNKNOWN);
 140         try {
 141             if (storage.containsKey(STORAGE_KEY_REFRESH_TOKEN)) {
 142                 ondusService = OndusService.login(storage.get(STORAGE_KEY_REFRESH_TOKEN));
 143                 scheduleTokenRefresh();
 144             } else {
 145                 // TODO: That's probably really inefficient, internally the loginWebform method acquires a refresh
 146                 // token, maybe there should be a way to obtain this token here, somehow.
 147                 ondusService = OndusService.loginWebform(config.username, config.password);
 148             }
 149             updateStatus(ThingStatus.ONLINE);
 150
 151             scheduler.submit(() -> getThing().getThings().forEach(thing -> {
 152                 GroheOndusBaseHandler thingHandler = (GroheOndusBaseHandler) thing.getHandler();
 153                 if (thingHandler != null) {
 154                     thingHandler.updateChannels();
 155                 }
 156             }));
 157         } catch (LoginException e) {
 158             logger.debug("Grohe api login failed", e);
 159             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, "Login failed");
 160         } catch (IOException e) {
 161             logger.debug("Communication error while logging into the grohe api", e);
 162             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 163         }
 164     }
 165 }