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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.unifi.internal.handler;
  14
  15 import static org.openhab.core.thing.ThingStatus.OFFLINE;
  16 import static org.openhab.core.thing.ThingStatus.ONLINE;
  17 import static org.openhab.core.thing.ThingStatusDetail.*;
  18
  19 import java.util.concurrent.ScheduledFuture;
  20 import java.util.concurrent.TimeUnit;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.eclipse.jdt.annotation.Nullable;
  24 import org.eclipse.jetty.client.HttpClient;
  25 import org.openhab.binding.unifi.internal.UniFiBindingConstants;
  26 import org.openhab.binding.unifi.internal.UniFiControllerThingConfig;
  27 import org.openhab.binding.unifi.internal.api.UniFiCommunicationException;
  28 import org.openhab.binding.unifi.internal.api.UniFiException;
  29 import org.openhab.binding.unifi.internal.api.UniFiInvalidCredentialsException;
  30 import org.openhab.binding.unifi.internal.api.UniFiInvalidHostException;
  31 import org.openhab.binding.unifi.internal.api.UniFiSSLException;
  32 import org.openhab.binding.unifi.internal.api.model.UniFiController;
  33 import org.openhab.core.thing.Bridge;
  34 import org.openhab.core.thing.ChannelUID;
  35 import org.openhab.core.thing.ThingStatus;
  36 import org.openhab.core.thing.ThingStatusDetail;
  37 import org.openhab.core.thing.ThingStatusInfo;
  38 import org.openhab.core.thing.ThingTypeUID;
  39 import org.openhab.core.thing.binding.BaseBridgeHandler;
  40 import org.openhab.core.thing.binding.builder.ThingStatusInfoBuilder;
  41 import org.openhab.core.types.Command;
  42 import org.slf4j.Logger;
  43 import org.slf4j.LoggerFactory;
  44
  45 /**
  46  * The {@link UniFiControllerThingHandler} is responsible for handling commands and status
  47  * updates for the UniFi Controller.
  48  *
  49  * @author Matthew Bowman - Initial contribution
  50  */
  51 @NonNullByDefault
  52 public class UniFiControllerThingHandler extends BaseBridgeHandler {
  53
  54     public static boolean supportsThingType(ThingTypeUID thingTypeUID) {
  55         return UniFiBindingConstants.THING_TYPE_CONTROLLER.equals(thingTypeUID);
  56     }
  57
  58     private static final String STATUS_DESCRIPTION_COMMUNICATION_ERROR = "Error communicating with the UniFi controller";
  59
  60     private static final String STATUS_DESCRIPTION_SSL_ERROR = "Error establishing an SSL connection with the UniFi controller";
  61
  62     private static final String STATUS_DESCRIPTION_INVALID_CREDENTIALS = "Invalid username and/or password - please double-check your configuration";
  63
  64     private static final String STATUS_DESCRIPTION_INVALID_HOSTNAME = "Invalid hostname - please double-check your configuration";
  65
  66     private final Logger logger = LoggerFactory.getLogger(UniFiControllerThingHandler.class);
  67
  68     private UniFiControllerThingConfig config = new UniFiControllerThingConfig();
  69
  70     private @Nullable volatile UniFiController controller; /* mgb: volatile because accessed from multiple threads */
  71
  72     private @Nullable ScheduledFuture<?> refreshJob;
  73
  74     private final HttpClient httpClient;
  75
  76     public UniFiControllerThingHandler(Bridge bridge, HttpClient httpClient) {
  77         super(bridge);
  78         this.httpClient = httpClient;
  79     }
  80
  81     // Public API
  82
  83     @Override
  84     public void initialize() {
  85         // mgb: called when the config changes
  86         cancelRefreshJob();
  87         config = getConfig().as(UniFiControllerThingConfig.class);
  88         logger.debug("Initializing the UniFi Controller Handler with config = {}", config);
  89         try {
  90             controller = new UniFiController(httpClient, config.getHost(), config.getPort(), config.getUsername(),
  91                     config.getPassword(), config.isUniFiOS());
  92             controller.start();
  93             updateStatus(ONLINE);
  94         } catch (UniFiInvalidHostException e) {
  95             updateStatus(OFFLINE, CONFIGURATION_ERROR, STATUS_DESCRIPTION_INVALID_HOSTNAME);
  96         } catch (UniFiCommunicationException e) {
  97             updateStatus(OFFLINE, COMMUNICATION_ERROR, STATUS_DESCRIPTION_COMMUNICATION_ERROR);
  98         } catch (UniFiSSLException e) {
  99             updateStatus(OFFLINE, CONFIGURATION_ERROR, STATUS_DESCRIPTION_SSL_ERROR);
 100         } catch (UniFiInvalidCredentialsException e) {
 101             updateStatus(OFFLINE, CONFIGURATION_ERROR, STATUS_DESCRIPTION_INVALID_CREDENTIALS);
 102         } catch (UniFiException e) {
 103             logger.error("Unknown error while configuring the UniFi Controller", e);
 104             updateStatus(OFFLINE, CONFIGURATION_ERROR, e.getMessage());
 105         }
 106     }
 107
 108     @Override
 109     protected void updateStatus(ThingStatus status, ThingStatusDetail statusDetail, @Nullable String description) {
 110         if (status == ONLINE || (status == OFFLINE && statusDetail == COMMUNICATION_ERROR)) {
 111             scheduleRefreshJob();
 112         } else if (status == OFFLINE && statusDetail == CONFIGURATION_ERROR) {
 113             cancelRefreshJob();
 114         }
 115         // mgb: update the status only if it's changed
 116         ThingStatusInfo statusInfo = ThingStatusInfoBuilder.create(status, statusDetail).withDescription(description)
 117                 .build();
 118         if (!statusInfo.equals(getThing().getStatusInfo())) {
 119             super.updateStatus(status, statusDetail, description);
 120         }
 121     }
 122
 123     @Override
 124     public void dispose() {
 125         cancelRefreshJob();
 126         if (controller != null) {
 127             try {
 128                 controller.stop();
 129             } catch (UniFiException e) {
 130                 // mgb: nop as we're in dispose
 131             }
 132             controller = null;
 133         }
 134     }
 135
 136     @Override
 137     public void handleCommand(ChannelUID channelUID, Command command) {
 138         // nop - read-only binding
 139         logger.warn("Ignoring command = {} for channel = {} - the UniFi binding is read-only!", command, channelUID);
 140     }
 141
 142     public @Nullable UniFiController getController() {
 143         return controller;
 144     }
 145
 146     public int getRefreshInterval() {
 147         return config.getRefresh();
 148     }
 149
 150     // Private API
 151
 152     private void scheduleRefreshJob() {
 153         synchronized (this) {
 154             if (refreshJob == null) {
 155                 logger.debug("Scheduling refresh job every {}s", config.getRefresh());
 156                 refreshJob = scheduler.scheduleWithFixedDelay(this::run, 0, config.getRefresh(), TimeUnit.SECONDS);
 157             }
 158         }
 159     }
 160
 161     private void cancelRefreshJob() {
 162         synchronized (this) {
 163             if (refreshJob != null) {
 164                 logger.debug("Cancelling refresh job");
 165                 refreshJob.cancel(true);
 166                 refreshJob = null;
 167             }
 168         }
 169     }
 170
 171     private void run() {
 172         try {
 173             logger.trace("Executing refresh job");
 174             refresh();
 175             updateStatus(ONLINE);
 176         } catch (UniFiCommunicationException e) {
 177             updateStatus(OFFLINE, COMMUNICATION_ERROR, STATUS_DESCRIPTION_COMMUNICATION_ERROR);
 178         } catch (UniFiInvalidCredentialsException e) {
 179             updateStatus(OFFLINE, CONFIGURATION_ERROR, STATUS_DESCRIPTION_INVALID_CREDENTIALS);
 180         } catch (Exception e) {
 181             logger.warn("Unhandled exception while refreshing the UniFi Controller {} - {}", getThing().getUID(),
 182                     e.getMessage());
 183             updateStatus(OFFLINE, COMMUNICATION_ERROR, e.getMessage());
 184         }
 185     }
 186
 187     private void refresh() throws UniFiException {
 188         if (controller != null) {
 189             logger.debug("Refreshing the UniFi Controller {}", getThing().getUID());
 190             controller.refresh();
 191             // mgb: then refresh all the client things
 192             getThing().getThings().forEach((thing) -> {
 193                 if (thing.getHandler() instanceof UniFiBaseThingHandler) {
 194                     ((UniFiBaseThingHandler) thing.getHandler()).refresh();
 195                 }
 196             });
 197         }
 198     }
 199 }