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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.hydrawise.internal.handler;
  14
  15 import java.io.IOException;
  16 import java.util.ArrayList;
  17 import java.util.Collection;
  18 import java.util.Collections;
  19 import java.util.List;
  20 import java.util.Set;
  21 import java.util.concurrent.ScheduledFuture;
  22 import java.util.concurrent.TimeUnit;
  23
  24 import org.eclipse.jdt.annotation.NonNullByDefault;
  25 import org.eclipse.jdt.annotation.Nullable;
  26 import org.eclipse.jetty.client.HttpClient;
  27 import org.openhab.binding.hydrawise.internal.HydrawiseControllerListener;
  28 import org.openhab.binding.hydrawise.internal.api.HydrawiseAuthenticationException;
  29 import org.openhab.binding.hydrawise.internal.api.HydrawiseConnectionException;
  30 import org.openhab.binding.hydrawise.internal.api.graphql.HydrawiseGraphQLClient;
  31 import org.openhab.binding.hydrawise.internal.api.graphql.dto.Customer;
  32 import org.openhab.binding.hydrawise.internal.api.graphql.dto.QueryResponse;
  33 import org.openhab.binding.hydrawise.internal.config.HydrawiseAccountConfiguration;
  34 import org.openhab.binding.hydrawise.internal.discovery.HydrawiseCloudControllerDiscoveryService;
  35 import org.openhab.core.auth.client.oauth2.AccessTokenRefreshListener;
  36 import org.openhab.core.auth.client.oauth2.AccessTokenResponse;
  37 import org.openhab.core.auth.client.oauth2.OAuthClientService;
  38 import org.openhab.core.auth.client.oauth2.OAuthException;
  39 import org.openhab.core.auth.client.oauth2.OAuthFactory;
  40 import org.openhab.core.auth.client.oauth2.OAuthResponseException;
  41 import org.openhab.core.config.core.Configuration;
  42 import org.openhab.core.thing.Bridge;
  43 import org.openhab.core.thing.ChannelUID;
  44 import org.openhab.core.thing.ThingStatus;
  45 import org.openhab.core.thing.ThingStatusDetail;
  46 import org.openhab.core.thing.binding.BaseBridgeHandler;
  47 import org.openhab.core.thing.binding.ThingHandlerService;
  48 import org.openhab.core.types.Command;
  49 import org.slf4j.Logger;
  50 import org.slf4j.LoggerFactory;
  51
  52 /**
  53  * The {@link HydrawiseAccountHandler} is responsible for handling for connecting to a Hydrawise account and polling for
  54  * controller data
  55  *
  56  * @author Dan Cunningham - Initial contribution
  57  */
  58 @NonNullByDefault
  59 public class HydrawiseAccountHandler extends BaseBridgeHandler implements AccessTokenRefreshListener {
  60     private final Logger logger = LoggerFactory.getLogger(HydrawiseAccountHandler.class);
  61     /**
  62      * Minimum amount of time we can poll for updates
  63      */
  64     private static final int MIN_REFRESH_SECONDS = 30;
  65     private static final String BASE_URL = "https://app.hydrawise.com/api/v2/";
  66     private static final String AUTH_URL = BASE_URL + "oauth/access-token";
  67     private static final String CLIENT_SECRET = "zn3CrjglwNV1";
  68     private static final String CLIENT_ID = "hydrawise_app";
  69     private static final String SCOPE = "all";
  70     private final List<HydrawiseControllerListener> controllerListeners = Collections
  71             .synchronizedList(new ArrayList<HydrawiseControllerListener>());
  72     private final HttpClient httpClient;
  73     private final OAuthFactory oAuthFactory;
  74     private @Nullable OAuthClientService oAuthService;
  75     private @Nullable HydrawiseGraphQLClient apiClient;
  76     private @Nullable ScheduledFuture<?> pollFuture;
  77     private @Nullable Customer lastData;
  78     private int refresh;
  79
  80     public HydrawiseAccountHandler(final Bridge bridge, final HttpClient httpClient, final OAuthFactory oAuthFactory) {
  81         super(bridge);
  82         this.httpClient = httpClient;
  83         this.oAuthFactory = oAuthFactory;
  84     }
  85
  86     @Override
  87     public void handleCommand(ChannelUID channelUID, Command command) {
  88     }
  89
  90     @Override
  91     public void initialize() {
  92         OAuthClientService oAuthService = oAuthFactory.createOAuthClientService(getThing().toString(), AUTH_URL,
  93                 AUTH_URL, CLIENT_ID, CLIENT_SECRET, SCOPE, false);
  94         this.oAuthService = oAuthService;
  95         oAuthService.addAccessTokenRefreshListener(this);
  96         this.apiClient = new HydrawiseGraphQLClient(httpClient, oAuthService);
  97         logger.debug("Handler initialized.");
  98         scheduler.schedule(() -> configure(oAuthService), 0, TimeUnit.SECONDS);
  99     }
 100
 101     @Override
 102     public void dispose() {
 103         logger.debug("Handler disposed.");
 104         clearPolling();
 105         OAuthClientService oAuthService = this.oAuthService;
 106         if (oAuthService != null) {
 107             oAuthService.removeAccessTokenRefreshListener(this);
 108             oAuthFactory.ungetOAuthService(getThing().toString());
 109             this.oAuthService = null;
 110         }
 111     }
 112
 113     @Override
 114     public void handleRemoval() {
 115         oAuthFactory.deleteServiceAndAccessToken(getThing().toString());
 116         super.handleRemoval();
 117     }
 118
 119     @Override
 120     public void onAccessTokenResponse(AccessTokenResponse tokenResponse) {
 121         logger.debug("Auth Token Refreshed, expires in {}", tokenResponse.getExpiresIn());
 122     }
 123
 124     @Override
 125     public Collection<Class<? extends ThingHandlerService>> getServices() {
 126         return Set.of(HydrawiseCloudControllerDiscoveryService.class);
 127     }
 128
 129     public void addControllerListeners(HydrawiseControllerListener listener) {
 130         this.controllerListeners.add(listener);
 131         Customer data = lastData;
 132         if (data != null) {
 133             listener.onData(data.controllers);
 134         }
 135     }
 136
 137     public void removeControllerListeners(HydrawiseControllerListener listener) {
 138         synchronized (controllerListeners) {
 139             this.controllerListeners.remove(listener);
 140         }
 141     }
 142
 143     public @Nullable HydrawiseGraphQLClient graphQLClient() {
 144         return apiClient;
 145     }
 146
 147     public @Nullable Customer lastData() {
 148         return lastData;
 149     }
 150
 151     public void refreshData(int delaySeconds) {
 152         initPolling(delaySeconds, this.refresh);
 153     }
 154
 155     private void configure(OAuthClientService oAuthService) {
 156         HydrawiseAccountConfiguration config = getConfig().as(HydrawiseAccountConfiguration.class);
 157         try {
 158             if (!config.userName.isEmpty() && !config.password.isEmpty()) {
 159                 if (!config.savePassword) {
 160                     Configuration editedConfig = editConfiguration();
 161                     editedConfig.remove("password");
 162                     updateConfiguration(editedConfig);
 163                 }
 164                 oAuthService.getAccessTokenByResourceOwnerPasswordCredentials(config.userName, config.password, SCOPE);
 165             } else if (oAuthService.getAccessTokenResponse() == null) {
 166                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, "Login credentials required.");
 167                 return;
 168             }
 169             this.refresh = Math.max(config.refreshInterval, MIN_REFRESH_SECONDS);
 170             initPolling(0, refresh);
 171         } catch (OAuthException | IOException e) {
 172             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 173         } catch (OAuthResponseException e) {
 174             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, "Login credentials required.");
 175         }
 176     }
 177
 178     /**
 179      * Starts/Restarts polling with an initial delay. This allows changes in the poll cycle for when commands are sent
 180      * and we need to poll sooner then the next refresh cycle.
 181      */
 182     private synchronized void initPolling(int initalDelay, int refresh) {
 183         clearPolling();
 184         pollFuture = scheduler.scheduleWithFixedDelay(this::poll, initalDelay, refresh, TimeUnit.SECONDS);
 185     }
 186
 187     /**
 188      * Stops/clears this thing's polling future
 189      */
 190     private void clearPolling() {
 191         ScheduledFuture<?> localFuture = pollFuture;
 192         if (isFutureValid(localFuture)) {
 193             if (localFuture != null) {
 194                 localFuture.cancel(false);
 195             }
 196         }
 197     }
 198
 199     private boolean isFutureValid(@Nullable ScheduledFuture<?> future) {
 200         return future != null && !future.isCancelled();
 201     }
 202
 203     private void poll() {
 204         poll(true);
 205     }
 206
 207     private void poll(boolean retry) {
 208         try {
 209             QueryResponse response = apiClient.queryControllers();
 210             if (response == null) {
 211                 throw new HydrawiseConnectionException("Malformed response");
 212             }
 213             if (response.errors != null && !response.errors.isEmpty()) {
 214                 throw new HydrawiseConnectionException(response.errors.stream().map(error -> error.message).reduce("",
 215                         (messages, message) -> messages + message + ". "));
 216             }
 217             if (getThing().getStatus() != ThingStatus.ONLINE) {
 218                 updateStatus(ThingStatus.ONLINE);
 219             }
 220             lastData = response.data.me;
 221             synchronized (controllerListeners) {
 222                 controllerListeners.forEach(listener -> {
 223                     listener.onData(response.data.me.controllers);
 224                 });
 225             }
 226         } catch (HydrawiseConnectionException e) {
 227             if (retry) {
 228                 logger.debug("Retrying failed poll", e);
 229                 poll(false);
 230             } else {
 231                 logger.debug("Will try again during next poll period", e);
 232                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 233             }
 234         } catch (HydrawiseAuthenticationException e) {
 235             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, e.getMessage());
 236             clearPolling();
 237         }
 238     }
 239 }