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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.paradoxalarm.internal.handlers;
  14
  15 import java.io.IOException;
  16 import java.net.UnknownHostException;
  17 import java.util.Arrays;
  18 import java.util.Collection;
  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.openhab.binding.paradoxalarm.internal.communication.CommunicationState;
  26 import org.openhab.binding.paradoxalarm.internal.communication.GenericCommunicator;
  27 import org.openhab.binding.paradoxalarm.internal.communication.ICommunicatorBuilder;
  28 import org.openhab.binding.paradoxalarm.internal.communication.IDataUpdateListener;
  29 import org.openhab.binding.paradoxalarm.internal.communication.IP150Command;
  30 import org.openhab.binding.paradoxalarm.internal.communication.IParadoxCommunicator;
  31 import org.openhab.binding.paradoxalarm.internal.communication.IParadoxInitialLoginCommunicator;
  32 import org.openhab.binding.paradoxalarm.internal.communication.ISocketTimeOutListener;
  33 import org.openhab.binding.paradoxalarm.internal.communication.ParadoxBuilderFactory;
  34 import org.openhab.binding.paradoxalarm.internal.exceptions.ParadoxRuntimeException;
  35 import org.openhab.binding.paradoxalarm.internal.model.PanelType;
  36 import org.openhab.binding.paradoxalarm.internal.model.ParadoxInformationConstants;
  37 import org.openhab.binding.paradoxalarm.internal.model.ParadoxPanel;
  38 import org.openhab.core.library.types.StringType;
  39 import org.openhab.core.thing.Bridge;
  40 import org.openhab.core.thing.Channel;
  41 import org.openhab.core.thing.ChannelUID;
  42 import org.openhab.core.thing.Thing;
  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.ThingHandler;
  47 import org.openhab.core.types.Command;
  48 import org.openhab.core.types.RefreshType;
  49 import org.slf4j.Logger;
  50 import org.slf4j.LoggerFactory;
  51
  52 /**
  53  * The {@link ParadoxIP150BridgeHandler} This is the handler that takes care of communication to/from Paradox alarm
  54  * system.
  55  *
  56  * @author Konstantin Polihronov - Initial contribution
  57  */
  58 @SuppressWarnings("null")
  59 @NonNullByDefault({})
  60 public class ParadoxIP150BridgeHandler extends BaseBridgeHandler
  61         implements IDataUpdateListener, ISocketTimeOutListener {
  62
  63     private static final String RESET_COMMAND = "RESET";
  64
  65     private static final int ONLINE_WAIT_TRESHOLD_MILLIS = 10000;
  66
  67     private static final int INITIAL_SCHEDULE_DELAY_SECONDS = 5;
  68
  69     private final Logger logger = LoggerFactory.getLogger(ParadoxIP150BridgeHandler.class);
  70
  71     private IParadoxCommunicator communicator;
  72     private ParadoxPanel panel = new ParadoxPanel();
  73
  74     private ParadoxIP150BridgeConfiguration config;
  75     private @Nullable ScheduledFuture<?> refreshCacheUpdateSchedule;
  76
  77     private long timeStamp = 0;
  78
  79     private ScheduledFuture<?> resetScheduleFuture;
  80
  81     public ParadoxIP150BridgeHandler(Bridge bridge) {
  82         super(bridge);
  83     }
  84
  85     @Override
  86     public void initialize() {
  87         logger.debug("Start initialize()...");
  88         updateStatus(ThingStatus.UNKNOWN);
  89         logger.debug("Starting creation of communicator.");
  90         config = getConfigAs(ParadoxIP150BridgeConfiguration.class);
  91
  92         scheduler.execute(this::initializeCommunicator);
  93         logger.debug("Finished initialize().");
  94     }
  95
  96     private synchronized void initializeCommunicator() {
  97         try {
  98             String ipAddress = config.getIpAddress();
  99             int tcpPort = config.getPort();
 100             String ip150Password = config.getIp150Password();
 101             String pcPassword = config.getPcPassword();
 102             boolean useEncryption = config.isEncrypt();
 103
 104             // Early exit. If panel type is configured and known to the binding skip auto-detection. Saves one full
 105             // initial login process to detect the panel type.
 106             PanelType configuredPanelType = PanelType.from(config.getPanelType());
 107             if (configuredPanelType != PanelType.UNKNOWN) {
 108                 logger.debug("Configuration file has pannelType={}. Skipping Phase1 (Autodiscovery)",
 109                         configuredPanelType);
 110                 scheduler.schedule(() -> createDiscoveredCommunicatorJob(configuredPanelType), 3, TimeUnit.SECONDS);
 111                 return;
 112             }
 113
 114             logger.debug("Phase1 - Auto discover communicator");
 115             IParadoxInitialLoginCommunicator initialCommunicator = new GenericCommunicator(ipAddress, tcpPort,
 116                     ip150Password, pcPassword, scheduler, useEncryption);
 117             initialCommunicator.startLoginSequence();
 118
 119             timeStamp = System.currentTimeMillis();
 120             scheduler.schedule(() -> doPostOnlineTask(initialCommunicator), 500, TimeUnit.MILLISECONDS);
 121         } catch (UnknownHostException e) {
 122             logger.warn("Error while starting socket communication. {}", e.getMessage());
 123             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 124                     "Unknown host. Probably misconfiguration or DNS issue.");
 125             throw new ParadoxRuntimeException(e);
 126         } catch (IOException e) {
 127             logger.warn("Error while starting socket communication. {}", e.getMessage());
 128             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 129                     "Error while starting socket communication.");
 130             throw new ParadoxRuntimeException(e);
 131         }
 132     }
 133
 134     private synchronized void doPostOnlineTask(IParadoxInitialLoginCommunicator initialCommunicator) {
 135         if (!initialCommunicator.isOnline()) {
 136             if (System.currentTimeMillis() - timeStamp <= ONLINE_WAIT_TRESHOLD_MILLIS) {
 137                 scheduler.schedule(() -> doPostOnlineTask(initialCommunicator), 500, TimeUnit.MILLISECONDS);
 138                 logger.debug("Communicator not yet online. Rescheduling...");
 139             } else {
 140                 logger.warn(
 141                         "Initial communicator not coming up online for {} seconds. Probably there is something wrong with communication.",
 142                         ONLINE_WAIT_TRESHOLD_MILLIS);
 143                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 144                         "Error while starting socket communication.");
 145             }
 146             return;
 147         }
 148
 149         byte[] panelInfoBytes = initialCommunicator.getPanelInfoBytes();
 150
 151         PanelType panelType = ParadoxInformationConstants.parsePanelType(panelInfoBytes);
 152         logger.info("Found {} panel type.", panelType);
 153         CommunicationState.logout(initialCommunicator);
 154
 155         // Wait 3 seconds before we create the discovered communicator so we ensure that the socket is closed
 156         // successfully from both ends
 157         scheduler.schedule(() -> createDiscoveredCommunicatorJob(panelType), 3, TimeUnit.SECONDS);
 158     }
 159
 160     protected void createDiscoveredCommunicatorJob(PanelType panelType) {
 161         // If not detected properly, use the value from config
 162         if (panelType == PanelType.UNKNOWN) {
 163             panelType = PanelType.from(config.getPanelType());
 164         }
 165
 166         logger.debug("Phase2 - Creating communicator for panel {}", panelType);
 167         ICommunicatorBuilder builder = new ParadoxBuilderFactory().createBuilder(panelType);
 168         communicator = builder.withIp150Password(config.getIp150Password()).withPcPassword(config.getPcPassword())
 169                 .withIpAddress(config.getIpAddress()).withTcpPort(config.getPort())
 170                 .withMaxPartitions(config.getMaxPartitions()).withMaxZones(config.getMaxZones())
 171                 .withScheduler(scheduler).withEncryption(config.isEncrypt()).build();
 172
 173         panel.setCommunicator(communicator);
 174
 175         Collection<IDataUpdateListener> listeners = Arrays.asList(panel, this);
 176         communicator.setListeners(listeners);
 177         communicator.setStoListener(this);
 178         logger.debug("Listeners set to: {}", listeners);
 179
 180         communicator.startLoginSequence();
 181
 182         timeStamp = System.currentTimeMillis();
 183         doPostOnlineFinalCommunicatorJob();
 184     }
 185
 186     private void doPostOnlineFinalCommunicatorJob() {
 187         if (!communicator.isOnline()) {
 188             if (System.currentTimeMillis() - timeStamp <= ONLINE_WAIT_TRESHOLD_MILLIS) {
 189                 scheduler.schedule(this::doPostOnlineFinalCommunicatorJob, 1, TimeUnit.SECONDS);
 190                 logger.debug("Communicator not yet online. Rescheduling...");
 191                 return;
 192             } else {
 193                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 194                         "Error while starting socket communication.");
 195                 ParadoxRuntimeException exception = new ParadoxRuntimeException(
 196                         "Communicator didn't go online in defined treshold time. " + ONLINE_WAIT_TRESHOLD_MILLIS
 197                                 + "sec. You can still try to reset the bridge with command RESET.");
 198                 logger.debug("Problem with communication", exception);
 199                 throw exception;
 200             }
 201         }
 202
 203         logger.debug("Communicator created successfully.");
 204         updateStatus(ThingStatus.ONLINE);
 205     }
 206
 207     @Override
 208     public void dispose() {
 209         cancelSchedule(refreshCacheUpdateSchedule);
 210         CommunicationState.logout(communicator);
 211         panel.dispose();
 212         super.dispose();
 213     }
 214
 215     private void scheduleRefresh() {
 216         logger.debug("Scheduling cache update. Refresh interval: {}s. Starts after: {}s.", config.getRefresh(),
 217                 INITIAL_SCHEDULE_DELAY_SECONDS);
 218         refreshCacheUpdateSchedule = scheduler.scheduleWithFixedDelay(communicator::refreshMemoryMap,
 219                 INITIAL_SCHEDULE_DELAY_SECONDS, config.getRefresh(), TimeUnit.SECONDS);
 220     }
 221
 222     private void cancelSchedule(@Nullable ScheduledFuture<?> schedule) {
 223         if (schedule != null && !schedule.isCancelled()) {
 224             boolean cancelingResult = schedule.cancel(true);
 225             String cancelingSuccessful = cancelingResult ? "successful" : "failed";
 226             logger.debug("Canceling schedule of {} is {}", schedule, cancelingSuccessful);
 227         }
 228     }
 229
 230     @Override
 231     public void update() {
 232         updateStatusChannel();
 233
 234         Bridge bridge = getThing();
 235         if (bridge.getStatus() == ThingStatus.OFFLINE) {
 236             if (communicator.isOnline()) {
 237                 updateStatus(ThingStatus.ONLINE);
 238             } else {
 239                 logger.debug("Bridge {} triggered update but is OFFLINE", bridge.getUID());
 240                 return;
 241             }
 242         }
 243
 244         List<Thing> things = bridge.getThings();
 245         for (Thing thing : things) {
 246             ThingHandler handler = thing.getHandler();
 247             Channel bridgeChannel = bridge
 248                     .getChannel(ParadoxAlarmBindingConstants.IP150_COMMUNICATION_COMMAND_CHANNEL_UID);
 249             if (handler != null && bridgeChannel != null) {
 250                 handler.handleCommand(bridgeChannel.getUID(), RefreshType.REFRESH);
 251             }
 252         }
 253     }
 254
 255     @Override
 256     public void handleCommand(ChannelUID channelUID, Command command) {
 257         logger.debug("Received command {}", command);
 258         if (ThingStatus.OFFLINE == getThing().getStatus() && command instanceof RefreshType) {
 259             logger.debug("Bridge {} is OFFLINE. Cannot handle refresh commands.", getThing().getUID());
 260             return;
 261         }
 262
 263         if (ParadoxAlarmBindingConstants.IP150_COMMUNICATION_COMMAND_CHANNEL_UID.equals(channelUID.getId())) {
 264             logger.debug("Command is instance of {}", command.getClass());
 265             if (command instanceof StringType) {
 266                 String commandAsString = command.toFullString();
 267                 if (commandAsString.equals(RESET_COMMAND)) {
 268                     updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.BRIDGE_OFFLINE,
 269                             "Bringing bridge offline due to reinitialization of communicator.");
 270                     resetCommunicator();
 271                 } else {
 272                     communicator.executeCommand(commandAsString);
 273                 }
 274             }
 275         }
 276
 277         if (communicator != null && communicator.isOnline()) {
 278             logger.debug("Communicator is online");
 279             communicator.refreshMemoryMap();
 280             updateStatus(ThingStatus.ONLINE);
 281         } else {
 282             logger.debug("Communicator is null or not online");
 283             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.BRIDGE_OFFLINE, "Device is offline");
 284         }
 285     }
 286
 287     private void resetCommunicator() {
 288         updateStatus(ThingStatus.OFFLINE);
 289
 290         synchronized (communicator) {
 291             if (communicator != null) {
 292                 CommunicationState.logout(communicator);
 293             }
 294
 295             initializeCommunicator();
 296         }
 297
 298         resetScheduleFuture = null;
 299     }
 300
 301     @Override
 302     protected void updateStatus(ThingStatus status, ThingStatusDetail statusDetail, @Nullable String description) {
 303         updateStatusChannel();
 304
 305         super.updateStatus(status, statusDetail, description);
 306
 307         if (status.equals(ThingStatus.ONLINE)) {
 308             if (refreshCacheUpdateSchedule == null || refreshCacheUpdateSchedule.isDone()) {
 309                 scheduleRefresh();
 310             }
 311         } else {
 312             cancelSchedule(refreshCacheUpdateSchedule);
 313         }
 314     }
 315
 316     private void updateStatusChannel() {
 317         StringType communicatorStatus = communicator != null && communicator.isOnline()
 318                 ? ParadoxAlarmBindingConstants.STATE_ONLINE
 319                 : ParadoxAlarmBindingConstants.STATE_OFFLINE;
 320         updateState(ParadoxAlarmBindingConstants.IP150_COMMUNICATION_STATE_CHANNEL_UID, communicatorStatus);
 321     }
 322
 323     public IParadoxCommunicator getCommunicator() {
 324         return communicator;
 325     }
 326
 327     public ParadoxPanel getPanel() {
 328         return panel;
 329     }
 330
 331     @Override
 332     public void onSocketTimeOutOccurred(IOException exception) {
 333         logger.warn("TIMEOUT! {} received message for socket timeout. ", this, exception);
 334         if (resetScheduleFuture == null) {
 335             communicator.executeCommand(IP150Command.LOGOUT.name());
 336
 337             logger.warn("Reset task is null. Will schedule new task to reset communicator in {} seconds.",
 338                     config.getReconnectWaitTime());
 339             resetScheduleFuture = scheduler.schedule(this::resetCommunicator, config.getReconnectWaitTime(),
 340                     TimeUnit.SECONDS);
 341         }
 342     }
 343
 344     @Override
 345     public String toString() {
 346         return "ParadoxIP150BridgeHandler [" + getThing().getUID().getAsString() + "]";
 347     }
 348 }