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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.ojelectronics.internal;
  14
  15 import java.util.concurrent.ScheduledFuture;
  16 import java.util.concurrent.TimeUnit;
  17
  18 import org.eclipse.jdt.annotation.NonNullByDefault;
  19 import org.eclipse.jdt.annotation.Nullable;
  20 import org.eclipse.jetty.client.HttpClient;
  21 import org.openhab.binding.ojelectronics.internal.config.OJElectronicsBridgeConfiguration;
  22 import org.openhab.binding.ojelectronics.internal.models.groups.GroupContentResponseModel;
  23 import org.openhab.binding.ojelectronics.internal.services.RefreshGroupContentService;
  24 import org.openhab.binding.ojelectronics.internal.services.RefreshService;
  25 import org.openhab.binding.ojelectronics.internal.services.SignInService;
  26 import org.openhab.core.thing.Bridge;
  27 import org.openhab.core.thing.ChannelUID;
  28 import org.openhab.core.thing.ThingStatus;
  29 import org.openhab.core.thing.ThingStatusDetail;
  30 import org.openhab.core.thing.binding.BaseBridgeHandler;
  31 import org.openhab.core.thing.binding.BridgeHandler;
  32 import org.openhab.core.types.Command;
  33 import org.slf4j.Logger;
  34 import org.slf4j.LoggerFactory;
  35
  36 /**
  37  * Handles all traffic with OJ Electronics cloud
  38  *
  39  * @author Christian Kittel - Initial Contribution
  40  */
  41 @NonNullByDefault
  42 public class OJCloudHandler extends BaseBridgeHandler implements BridgeHandler {
  43
  44     private final Logger logger = LoggerFactory.getLogger(OJCloudHandler.class);
  45     private final HttpClient httpClient;
  46
  47     private @Nullable RefreshService refreshService;
  48     private @Nullable SignInService signInService;
  49     private OJElectronicsBridgeConfiguration configuration;
  50     private @Nullable ScheduledFuture<?> signTask;
  51
  52     public OJCloudHandler(Bridge bridge, HttpClient httpClient) {
  53         super(bridge);
  54         this.httpClient = httpClient;
  55         this.configuration = new OJElectronicsBridgeConfiguration();
  56     }
  57
  58     /**
  59      * Initializes the binding.
  60      */
  61     @Override
  62     public void initialize() {
  63         configuration = getConfigAs(OJElectronicsBridgeConfiguration.class);
  64         ensureSignIn();
  65     }
  66
  67     /**
  68      * Disposes the binding.
  69      */
  70     @Override
  71     public void dispose() {
  72         final RefreshService refreshService = this.refreshService;
  73         if (refreshService != null) {
  74             refreshService.stop();
  75         }
  76         final ScheduledFuture<?> signTask = this.signTask;
  77         if (signTask != null) {
  78             signTask.cancel(true);
  79         }
  80         this.refreshService = null;
  81         signInService = null;
  82         super.dispose();
  83     }
  84
  85     @Override
  86     public void handleCommand(ChannelUID channelUID, Command command) {
  87     }
  88
  89     private void ensureSignIn() {
  90         if (signInService == null) {
  91             signInService = new SignInService(configuration, httpClient);
  92         }
  93         final SignInService signInService = this.signInService;
  94         if (signInService != null) {
  95             signInService.signIn(this::handleSignInDone, this::handleConnectionLost,
  96                     this::handleUnauthorizedWhileSignIn);
  97         }
  98     }
  99
 100     private void handleRefreshDone(@Nullable GroupContentResponseModel groupContentResponse,
 101             @Nullable String errorMessage) {
 102         logger.trace("OJElectronicsCloudHandler.handleRefreshDone({})", groupContentResponse);
 103
 104         if (groupContentResponse != null && groupContentResponse.errorCode == 0) {
 105             new RefreshGroupContentService(groupContentResponse.groupContents, getThing().getThings()).handle();
 106         } else {
 107             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 108                     (errorMessage == null) ? "Wrong or no result model; Refreshing stoppped" : errorMessage);
 109             final RefreshService refreshService = this.refreshService;
 110             if (refreshService != null) {
 111                 refreshService.stop();
 112             }
 113         }
 114     }
 115
 116     private void handleSignInDone(String sessionId) {
 117         logger.trace("OJElectronicsCloudHandler.handleSignInDone({})", sessionId);
 118         if (refreshService == null) {
 119             refreshService = new RefreshService(configuration, httpClient, scheduler);
 120         }
 121         final RefreshService refreshService = this.refreshService;
 122         if (refreshService != null) {
 123             refreshService.start(sessionId, this::handleRefreshDone, this::handleConnectionLost,
 124                     this::handleUnauthorized);
 125
 126             updateStatus(ThingStatus.ONLINE);
 127         }
 128     }
 129
 130     private void handleUnauthorized() {
 131         final RefreshService refreshService = this.refreshService;
 132         if (refreshService != null) {
 133             refreshService.stop();
 134         }
 135         restartRefreshServiceAsync(1);
 136     }
 137
 138     private void handleUnauthorizedWhileSignIn() {
 139         updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 140                 "Could not sign in. Check user name and password.");
 141         final RefreshService refreshService = this.refreshService;
 142         if (refreshService != null) {
 143             refreshService.stop();
 144         }
 145     }
 146
 147     private void handleConnectionLost() {
 148         updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR);
 149         final RefreshService refreshService = this.refreshService;
 150         if (refreshService != null) {
 151             refreshService.stop();
 152         }
 153         restartRefreshServiceAsync(configuration.refreshDelayInSeconds);
 154     }
 155
 156     private void restartRefreshServiceAsync(long delayInSeconds) {
 157         signTask = scheduler.schedule(this::ensureSignIn, delayInSeconds, TimeUnit.SECONDS);
 158     }
 159 }