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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.zoneminder.internal.discovery;
  14
  15 import java.util.HashMap;
  16 import java.util.Map;
  17 import java.util.Set;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.openhab.binding.zoneminder.internal.ZoneMinderConstants;
  22 import org.openhab.binding.zoneminder.internal.handler.ZoneMinderServerBridgeHandler;
  23 import org.openhab.binding.zoneminder.internal.handler.ZoneMinderThingMonitorHandler;
  24 import org.openhab.core.config.discovery.AbstractDiscoveryService;
  25 import org.openhab.core.config.discovery.DiscoveryResult;
  26 import org.openhab.core.config.discovery.DiscoveryResultBuilder;
  27 import org.openhab.core.config.discovery.DiscoveryService;
  28 import org.openhab.core.thing.ThingTypeUID;
  29 import org.openhab.core.thing.ThingUID;
  30 import org.openhab.core.thing.binding.ThingHandler;
  31 import org.openhab.core.thing.binding.ThingHandlerService;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 import name.eskildsen.zoneminder.IZoneMinderMonitorData;
  36
  37 /**
  38  *
  39  * @author Martin S. Eskildsen - Initial contribution
  40  */
  41 public class ZoneMinderDiscoveryService extends AbstractDiscoveryService
  42         implements DiscoveryService, ThingHandlerService {
  43
  44     private final Logger logger = LoggerFactory.getLogger(ZoneMinderDiscoveryService.class);
  45
  46     private @NonNullByDefault({}) ZoneMinderServerBridgeHandler serverHandler;
  47
  48     public ZoneMinderDiscoveryService() {
  49         super(30);
  50     }
  51
  52     @Override
  53     public void setThingHandler(@Nullable ThingHandler handler) {
  54         if (handler instanceof ZoneMinderServerBridgeHandler) {
  55             this.serverHandler = (ZoneMinderServerBridgeHandler) handler;
  56             this.serverHandler.setDiscoveryService(this);
  57         }
  58     }
  59
  60     @Override
  61     public @Nullable ThingHandler getThingHandler() {
  62         return serverHandler;
  63     }
  64
  65     @Override
  66     public void activate() {
  67         logger.debug("[DISCOVERY]: Activating ZoneMinder discovery service for {}", serverHandler.getThing().getUID());
  68     }
  69
  70     @Override
  71     public void deactivate() {
  72         logger.debug("[DISCOVERY]: Deactivating ZoneMinder discovery service for {}",
  73                 serverHandler.getThing().getUID());
  74     }
  75
  76     @Override
  77     public Set<ThingTypeUID> getSupportedThingTypes() {
  78         return ZoneMinderThingMonitorHandler.SUPPORTED_THING_TYPES;
  79     }
  80
  81     @Override
  82     public void startBackgroundDiscovery() {
  83         logger.debug("[DISCOVERY]: Performing background discovery scan for {}", serverHandler.getThing().getUID());
  84         discoverMonitors();
  85     }
  86
  87     @Override
  88     public void startScan() {
  89         logger.debug("[DISCOVERY]: Starting discovery scan for {}", serverHandler.getThing().getUID());
  90         discoverMonitors();
  91     }
  92
  93     @Override
  94     public synchronized void abortScan() {
  95         super.abortScan();
  96     }
  97
  98     @Override
  99     protected synchronized void stopScan() {
 100         super.stopScan();
 101     }
 102
 103     protected String buildMonitorLabel(String id, String name) {
 104         return String.format("%s [%s]", ZoneMinderConstants.ZONEMINDER_MONITOR_NAME, name);
 105     }
 106
 107     protected synchronized void discoverMonitors() {
 108         // Add all existing devices
 109         for (IZoneMinderMonitorData monitor : serverHandler.getMonitors()) {
 110             deviceAdded(monitor);
 111         }
 112     }
 113
 114     private boolean monitorThingExists(ThingUID newThingUID) {
 115         return serverHandler.getThing().getThing(newThingUID) != null ? true : false;
 116     }
 117
 118     /**
 119      * This is called once the node is fully discovered. At this point we know most of the information about
 120      * the device including manufacturer information.
 121      *
 122      * @param node the node to be added
 123      */
 124     public void deviceAdded(IZoneMinderMonitorData monitor) {
 125         try {
 126             ThingUID bridgeUID = serverHandler.getThing().getUID();
 127             String monitorUID = String.format("%s-%s", ZoneMinderConstants.THING_ZONEMINDER_MONITOR, monitor.getId());
 128             ThingUID thingUID = new ThingUID(ZoneMinderConstants.THING_TYPE_THING_ZONEMINDER_MONITOR, bridgeUID,
 129                     monitorUID);
 130
 131             // Does Monitor exist?
 132             if (!monitorThingExists(thingUID)) {
 133                 logger.info("[DISCOVERY]: Monitor with Id='{}' and Name='{}' added", monitor.getId(),
 134                         monitor.getName());
 135                 Map<String, Object> properties = new HashMap<>(0);
 136                 properties.put(ZoneMinderConstants.PARAMETER_MONITOR_ID, Integer.valueOf(monitor.getId()));
 137                 properties.put(ZoneMinderConstants.PARAMETER_MONITOR_TRIGGER_TIMEOUT,
 138                         ZoneMinderConstants.PARAMETER_MONITOR_TRIGGER_TIMEOUT_DEFAULTVALUE);
 139                 properties.put(ZoneMinderConstants.PARAMETER_MONITOR_EVENTTEXT,
 140                         ZoneMinderConstants.MONITOR_EVENT_OPENHAB);
 141
 142                 DiscoveryResult discoveryResult = DiscoveryResultBuilder.create(thingUID).withProperties(properties)
 143                         .withBridge(bridgeUID).withLabel(buildMonitorLabel(monitor.getId(), monitor.getName())).build();
 144
 145                 thingDiscovered(discoveryResult);
 146             }
 147         } catch (Exception ex) {
 148             logger.error("[DISCOVERY]: Error occurred when calling 'monitorAdded' from Discovery. Exception={}",
 149                     ex.getMessage());
 150         }
 151     }
 152 }