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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.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.ThingStatus.UNKNOWN;
  18 import static org.openhab.core.thing.ThingStatusDetail.COMMUNICATION_ERROR;
  19 import static org.openhab.core.thing.ThingStatusDetail.CONFIGURATION_ERROR;
  20
  21 import java.util.Collection;
  22 import java.util.List;
  23 import java.util.concurrent.ScheduledFuture;
  24 import java.util.concurrent.TimeUnit;
  25
  26 import org.eclipse.jdt.annotation.NonNullByDefault;
  27 import org.eclipse.jdt.annotation.Nullable;
  28 import org.eclipse.jetty.client.HttpClient;
  29 import org.openhab.binding.unifi.internal.UniFiControllerThingConfig;
  30 import org.openhab.binding.unifi.internal.api.UniFiCommunicationException;
  31 import org.openhab.binding.unifi.internal.api.UniFiController;
  32 import org.openhab.binding.unifi.internal.api.UniFiException;
  33 import org.openhab.binding.unifi.internal.api.UniFiInvalidCredentialsException;
  34 import org.openhab.binding.unifi.internal.api.UniFiInvalidHostException;
  35 import org.openhab.binding.unifi.internal.api.UniFiSSLException;
  36 import org.openhab.core.thing.Bridge;
  37 import org.openhab.core.thing.ChannelUID;
  38 import org.openhab.core.thing.ThingStatus;
  39 import org.openhab.core.thing.ThingStatusDetail;
  40 import org.openhab.core.thing.ThingStatusInfo;
  41 import org.openhab.core.thing.binding.BaseBridgeHandler;
  42 import org.openhab.core.thing.binding.ThingHandler;
  43 import org.openhab.core.thing.binding.ThingHandlerService;
  44 import org.openhab.core.thing.binding.builder.ThingStatusInfoBuilder;
  45 import org.openhab.core.types.Command;
  46 import org.slf4j.Logger;
  47 import org.slf4j.LoggerFactory;
  48
  49 /**
  50  * The {@link UniFiControllerThingHandler} is responsible for handling commands and status
  51  * updates for the UniFi Controller.
  52  *
  53  * @author Matthew Bowman - Initial contribution
  54  */
  55 @NonNullByDefault
  56 public class UniFiControllerThingHandler extends BaseBridgeHandler {
  57
  58     private static final String STATUS_DESCRIPTION_COMMUNICATION_ERROR = "@text/error.bridge.offline.communication_error";
  59     private static final String STATUS_DESCRIPTION_SSL_ERROR = "@text/error.bridge.offline.ssl_error";
  60     private static final String STATUS_DESCRIPTION_INVALID_CREDENTIALS = "@text/error.bridge.offline.invalid_credentials";
  61     private static final String STATUS_DESCRIPTION_INVALID_HOSTNAME = "@text/error.bridge.offline.invalid_hostname";
  62
  63     private final Logger logger = LoggerFactory.getLogger(UniFiControllerThingHandler.class);
  64
  65     private UniFiControllerThingConfig config = new UniFiControllerThingConfig();
  66
  67     private @Nullable volatile UniFiController controller; /* mgb: volatile because accessed from multiple threads */
  68
  69     private @Nullable ScheduledFuture<?> refreshJob;
  70
  71     private final HttpClient httpClient;
  72
  73     public UniFiControllerThingHandler(final Bridge bridge, final HttpClient httpClient) {
  74         super(bridge);
  75         this.httpClient = httpClient;
  76     }
  77
  78     // Public API
  79
  80     @Override
  81     public Collection<Class<? extends ThingHandlerService>> getServices() {
  82         return List.of(UniFiThingDiscoveryService.class);
  83     }
  84
  85     @Override
  86     public void initialize() {
  87         config = getConfigAs(UniFiControllerThingConfig.class);
  88         logger.debug("Initializing the UniFi Controller Handler with config = {}", config);
  89         final UniFiController uc = new UniFiController(httpClient, config.getHost(), config.getPort(),
  90                 config.getUsername(), config.getPassword(), config.isUniFiOS());
  91
  92         controller = uc;
  93         updateStatus(UNKNOWN);
  94         scheduler.schedule(() -> start(uc), 10, TimeUnit.MILLISECONDS);
  95     }
  96
  97     @Override
  98     protected void updateStatus(final ThingStatus status, final ThingStatusDetail statusDetail,
  99             @Nullable final String description) {
 100         // mgb: update the status only if it's changed
 101         final ThingStatusInfo statusInfo = ThingStatusInfoBuilder.create(status, statusDetail)
 102                 .withDescription(description).build();
 103         if (!statusInfo.equals(getThing().getStatusInfo())) {
 104             super.updateStatus(status, statusDetail, description);
 105         }
 106     }
 107
 108     @Override
 109     public void dispose() {
 110         cancelRefreshJob();
 111         final UniFiController controller = this.controller;
 112
 113         if (controller != null) {
 114             try {
 115                 controller.stop();
 116             } catch (final UniFiException e) {
 117                 // mgb: nop as we're in dispose
 118             }
 119             this.controller = null;
 120         }
 121     }
 122
 123     @Override
 124     public void handleCommand(final ChannelUID channelUID, final Command command) {
 125         // nop - read-only binding
 126         logger.warn("Ignoring command = {} for channel = {} - the UniFi binding is read-only!", command, channelUID);
 127     }
 128
 129     public @Nullable UniFiController getController() {
 130         return controller;
 131     }
 132
 133     // Private API
 134
 135     private void start(final UniFiController uc) {
 136         boolean startRefresh = false;
 137         try {
 138             uc.start();
 139             startRefresh = true;
 140         } catch (final UniFiCommunicationException e) {
 141             updateStatus(OFFLINE, COMMUNICATION_ERROR, STATUS_DESCRIPTION_COMMUNICATION_ERROR);
 142             startRefresh = true;
 143         } catch (final UniFiInvalidHostException e) {
 144             updateStatus(OFFLINE, CONFIGURATION_ERROR, STATUS_DESCRIPTION_INVALID_HOSTNAME);
 145         } catch (final UniFiSSLException e) {
 146             updateStatus(OFFLINE, CONFIGURATION_ERROR, STATUS_DESCRIPTION_SSL_ERROR);
 147         } catch (final UniFiInvalidCredentialsException e) {
 148             updateStatus(OFFLINE, CONFIGURATION_ERROR, STATUS_DESCRIPTION_INVALID_CREDENTIALS);
 149         } catch (final UniFiException e) {
 150             logger.debug("Unknown error while configuring the UniFi Controller", e);
 151             updateStatus(OFFLINE, CONFIGURATION_ERROR, e.getMessage());
 152         }
 153         if (startRefresh) {
 154             logger.debug("Scheduling refresh job every {}s", config.getRefresh());
 155             refreshJob = scheduler.scheduleWithFixedDelay(this::run, 0, config.getRefresh(), TimeUnit.SECONDS);
 156         }
 157     }
 158
 159     private void cancelRefreshJob() {
 160         synchronized (this) {
 161             final ScheduledFuture<?> rj = refreshJob;
 162
 163             if (rj != null) {
 164                 logger.debug("Cancelling refresh job");
 165                 rj.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 (final UniFiCommunicationException e) {
 177             updateStatus(OFFLINE, COMMUNICATION_ERROR, STATUS_DESCRIPTION_COMMUNICATION_ERROR);
 178         } catch (final UniFiInvalidCredentialsException e) {
 179             updateStatus(OFFLINE, CONFIGURATION_ERROR, STATUS_DESCRIPTION_INVALID_CREDENTIALS);
 180         } catch (final RuntimeException | UniFiException e) {
 181             logger.debug("Unhandled exception while refreshing the UniFi Controller {}", getThing().getUID(), e);
 182             updateStatus(OFFLINE, COMMUNICATION_ERROR, e.getMessage());
 183         }
 184     }
 185
 186     private void refresh() throws UniFiException {
 187         final UniFiController uc = controller;
 188
 189         if (uc != null) {
 190             logger.debug("Refreshing the UniFi Controller {}", getThing().getUID());
 191             uc.refresh();
 192             // mgb: then refresh all the client things
 193             getThing().getThings().forEach((thing) -> {
 194                 final ThingHandler handler = thing.getHandler();
 195
 196                 if (handler instanceof UniFiBaseThingHandler) {
 197                     ((UniFiBaseThingHandler<?, ?>) handler).refresh();
 198                 }
 199             });
 200         }
 201     }
 202 }