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   1 /**
   2  * Copyright (c) 2010-2022 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.concurrent.ScheduledFuture;
  21 import java.util.concurrent.TimeUnit;
  22
  23 import org.eclipse.jdt.annotation.NonNullByDefault;
  24 import org.eclipse.jdt.annotation.Nullable;
  25 import org.eclipse.jetty.client.HttpClient;
  26 import org.openhab.binding.hydrawise.internal.HydrawiseControllerListener;
  27 import org.openhab.binding.hydrawise.internal.api.HydrawiseAuthenticationException;
  28 import org.openhab.binding.hydrawise.internal.api.HydrawiseConnectionException;
  29 import org.openhab.binding.hydrawise.internal.api.graphql.HydrawiseGraphQLClient;
  30 import org.openhab.binding.hydrawise.internal.api.graphql.dto.Customer;
  31 import org.openhab.binding.hydrawise.internal.api.graphql.dto.QueryResponse;
  32 import org.openhab.binding.hydrawise.internal.config.HydrawiseAccountConfiguration;
  33 import org.openhab.binding.hydrawise.internal.discovery.HydrawiseCloudControllerDiscoveryService;
  34 import org.openhab.core.auth.client.oauth2.AccessTokenRefreshListener;
  35 import org.openhab.core.auth.client.oauth2.AccessTokenResponse;
  36 import org.openhab.core.auth.client.oauth2.OAuthClientService;
  37 import org.openhab.core.auth.client.oauth2.OAuthException;
  38 import org.openhab.core.auth.client.oauth2.OAuthFactory;
  39 import org.openhab.core.auth.client.oauth2.OAuthResponseException;
  40 import org.openhab.core.config.core.Configuration;
  41 import org.openhab.core.thing.Bridge;
  42 import org.openhab.core.thing.ChannelUID;
  43 import org.openhab.core.thing.ThingStatus;
  44 import org.openhab.core.thing.ThingStatusDetail;
  45 import org.openhab.core.thing.binding.BaseBridgeHandler;
  46 import org.openhab.core.thing.binding.ThingHandlerService;
  47 import org.openhab.core.types.Command;
  48 import org.slf4j.Logger;
  49 import org.slf4j.LoggerFactory;
  50
  51 /**
  52  * The {@link HydrawiseAccountHandler} is responsible for handling for connecting to a Hydrawise account and polling for
  53  * controller data
  54  *
  55  * @author Dan Cunningham - Initial contribution
  56  */
  57 @NonNullByDefault
  58 public class HydrawiseAccountHandler extends BaseBridgeHandler implements AccessTokenRefreshListener {
  59     private final Logger logger = LoggerFactory.getLogger(HydrawiseAccountHandler.class);
  60     /**
  61      * Minimum amount of time we can poll for updates
  62      */
  63     private static final int MIN_REFRESH_SECONDS = 30;
  64     private static final String BASE_URL = "https://app.hydrawise.com/api/v2/";
  65     private static final String AUTH_URL = BASE_URL + "oauth/access-token";
  66     private static final String CLIENT_SECRET = "zn3CrjglwNV1";
  67     private static final String CLIENT_ID = "hydrawise_app";
  68     private static final String SCOPE = "all";
  69     private final List<HydrawiseControllerListener> controllerListeners = new ArrayList<HydrawiseControllerListener>();
  70     private final HydrawiseGraphQLClient apiClient;
  71     private final OAuthClientService oAuthService;
  72     private @Nullable ScheduledFuture<?> pollFuture;
  73     private @Nullable Customer lastData;
  74     private int refresh;
  75
  76     public HydrawiseAccountHandler(final Bridge bridge, final HttpClient httpClient, final OAuthFactory oAuthFactory) {
  77         super(bridge);
  78         this.oAuthService = oAuthFactory.createOAuthClientService(getThing().toString(), AUTH_URL, AUTH_URL, CLIENT_ID,
  79                 CLIENT_SECRET, SCOPE, false);
  80         oAuthService.addAccessTokenRefreshListener(this);
  81         this.apiClient = new HydrawiseGraphQLClient(httpClient, oAuthService);
  82     }
  83
  84     @Override
  85     public void handleCommand(ChannelUID channelUID, Command command) {
  86     }
  87
  88     @Override
  89     public void initialize() {
  90         logger.debug("Handler initialized.");
  91         scheduler.schedule(this::configure, 0, TimeUnit.SECONDS);
  92     }
  93
  94     @Override
  95     public void dispose() {
  96         logger.debug("Handler disposed.");
  97         clearPolling();
  98     }
  99
 100     @Override
 101     public void onAccessTokenResponse(AccessTokenResponse tokenResponse) {
 102         logger.debug("Auth Token Refreshed, expires in {}", tokenResponse.getExpiresIn());
 103     }
 104
 105     @Override
 106     public Collection<Class<? extends ThingHandlerService>> getServices() {
 107         return Collections.singleton(HydrawiseCloudControllerDiscoveryService.class);
 108     }
 109
 110     public void addControllerListeners(HydrawiseControllerListener listener) {
 111         this.controllerListeners.add(listener);
 112         Customer data = lastData;
 113         if (data != null) {
 114             listener.onData(data.controllers);
 115         }
 116     }
 117
 118     public void removeControllerListeners(HydrawiseControllerListener listener) {
 119         this.controllerListeners.remove(listener);
 120     }
 121
 122     public @Nullable HydrawiseGraphQLClient graphQLClient() {
 123         return apiClient;
 124     }
 125
 126     public @Nullable Customer lastData() {
 127         return lastData;
 128     }
 129
 130     public void refreshData(int delaySeconds) {
 131         initPolling(delaySeconds, this.refresh);
 132     }
 133
 134     private void configure() {
 135         HydrawiseAccountConfiguration config = getConfig().as(HydrawiseAccountConfiguration.class);
 136         try {
 137             if (!config.userName.isEmpty() && !config.password.isEmpty()) {
 138                 if (!config.savePassword) {
 139                     Configuration editedConfig = editConfiguration();
 140                     editedConfig.remove("password");
 141                     updateConfiguration(editedConfig);
 142                 }
 143                 oAuthService.getAccessTokenByResourceOwnerPasswordCredentials(config.userName, config.password, SCOPE);
 144             } else if (oAuthService.getAccessTokenResponse() == null) {
 145                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, "Login credentials required.");
 146                 return;
 147             }
 148             this.refresh = Math.max(config.refreshInterval, MIN_REFRESH_SECONDS);
 149             initPolling(0, refresh);
 150         } catch (OAuthException | IOException e) {
 151             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 152         } catch (OAuthResponseException e) {
 153             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, "Login credentials required.");
 154         }
 155     }
 156
 157     /**
 158      * Starts/Restarts polling with an initial delay. This allows changes in the poll cycle for when commands are sent
 159      * and we need to poll sooner then the next refresh cycle.
 160      */
 161     private synchronized void initPolling(int initalDelay, int refresh) {
 162         clearPolling();
 163         pollFuture = scheduler.scheduleWithFixedDelay(this::poll, initalDelay, refresh, TimeUnit.SECONDS);
 164     }
 165
 166     /**
 167      * Stops/clears this thing's polling future
 168      */
 169     private void clearPolling() {
 170         ScheduledFuture<?> localFuture = pollFuture;
 171         if (isFutureValid(localFuture)) {
 172             if (localFuture != null) {
 173                 localFuture.cancel(false);
 174             }
 175         }
 176     }
 177
 178     private boolean isFutureValid(@Nullable ScheduledFuture<?> future) {
 179         return future != null && !future.isCancelled();
 180     }
 181
 182     private void poll() {
 183         poll(true);
 184     }
 185
 186     private void poll(boolean retry) {
 187         try {
 188             QueryResponse response = apiClient.queryControllers();
 189             if (response == null) {
 190                 throw new HydrawiseConnectionException("Malformed response");
 191             }
 192             if (response.errors != null && response.errors.size() > 0) {
 193                 throw new HydrawiseConnectionException(response.errors.stream().map(error -> error.message).reduce("",
 194                         (messages, message) -> messages + message + ". "));
 195             }
 196             if (getThing().getStatus() != ThingStatus.ONLINE) {
 197                 updateStatus(ThingStatus.ONLINE);
 198             }
 199             lastData = response.data.me;
 200             controllerListeners.forEach(listener -> {
 201                 listener.onData(response.data.me.controllers);
 202             });
 203         } catch (HydrawiseConnectionException e) {
 204             if (retry) {
 205                 logger.debug("Retrying failed poll", e);
 206                 poll(false);
 207             } else {
 208                 logger.debug("Will try again during next poll period", e);
 209                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, e.getMessage());
 210             }
 211         } catch (HydrawiseAuthenticationException e) {
 212             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, e.getMessage());
 213             clearPolling();
 214         }
 215     }
 216 }