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   1 /**
   2  * Copyright (c) 2010-2023 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.chromecast.internal.factory;
  14
  15 import static org.openhab.binding.chromecast.internal.ChromecastBindingConstants.SUPPORTED_THING_TYPES_UIDS;
  16
  17 import java.util.Dictionary;
  18 import java.util.Map;
  19 import java.util.concurrent.ConcurrentHashMap;
  20
  21 import org.eclipse.jdt.annotation.NonNullByDefault;
  22 import org.eclipse.jdt.annotation.Nullable;
  23 import org.openhab.binding.chromecast.internal.handler.ChromecastHandler;
  24 import org.openhab.core.audio.AudioHTTPServer;
  25 import org.openhab.core.audio.AudioSink;
  26 import org.openhab.core.net.HttpServiceUtil;
  27 import org.openhab.core.net.NetworkAddressService;
  28 import org.openhab.core.thing.Thing;
  29 import org.openhab.core.thing.ThingTypeUID;
  30 import org.openhab.core.thing.binding.BaseThingHandlerFactory;
  31 import org.openhab.core.thing.binding.ThingHandler;
  32 import org.openhab.core.thing.binding.ThingHandlerFactory;
  33 import org.osgi.framework.ServiceRegistration;
  34 import org.osgi.service.component.ComponentContext;
  35 import org.osgi.service.component.annotations.Activate;
  36 import org.osgi.service.component.annotations.Component;
  37 import org.osgi.service.component.annotations.Reference;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 /**
  42  * The {@link ChromecastHandlerFactory} is responsible for creating things and thing handlers.
  43  *
  44  * @author Kai Kreuzer - Initial contribution
  45  */
  46 @Component(service = ThingHandlerFactory.class, configurationPid = "binding.chromecast")
  47 @NonNullByDefault
  48 public class ChromecastHandlerFactory extends BaseThingHandlerFactory {
  49     private final Logger logger = LoggerFactory.getLogger(ChromecastHandlerFactory.class);
  50
  51     private final Map<String, ServiceRegistration<AudioSink>> audioSinkRegistrations = new ConcurrentHashMap<>();
  52     private final AudioHTTPServer audioHTTPServer;
  53     private final NetworkAddressService networkAddressService;
  54
  55     /** url (scheme+server+port) to use for playing notification sounds. */
  56     private @Nullable String callbackUrl;
  57
  58     @Activate
  59     public ChromecastHandlerFactory(final @Reference AudioHTTPServer audioHTTPServer,
  60             final @Reference NetworkAddressService networkAddressService) {
  61         logger.debug("Creating new instance of ChromecastHandlerFactory");
  62         this.audioHTTPServer = audioHTTPServer;
  63         this.networkAddressService = networkAddressService;
  64     }
  65
  66     @Override
  67     protected void activate(ComponentContext componentContext) {
  68         super.activate(componentContext);
  69         Dictionary<String, Object> properties = componentContext.getProperties();
  70         callbackUrl = (String) properties.get("callbackUrl");
  71     }
  72
  73     @Override
  74     public boolean supportsThingType(ThingTypeUID thingTypeUID) {
  75         return SUPPORTED_THING_TYPES_UIDS.contains(thingTypeUID);
  76     }
  77
  78     @Override
  79     protected @Nullable ThingHandler createHandler(Thing thing) {
  80         ChromecastHandler handler = new ChromecastHandler(thing, audioHTTPServer, createCallbackUrl());
  81
  82         @SuppressWarnings("unchecked")
  83         ServiceRegistration<AudioSink> reg = (ServiceRegistration<AudioSink>) bundleContext
  84                 .registerService(AudioSink.class.getName(), handler, null);
  85         audioSinkRegistrations.put(thing.getUID().toString(), reg);
  86
  87         return handler;
  88     }
  89
  90     private @Nullable String createCallbackUrl() {
  91         if (callbackUrl != null) {
  92             return callbackUrl;
  93         } else {
  94             final String ipAddress = networkAddressService.getPrimaryIpv4HostAddress();
  95             if (ipAddress == null) {
  96                 logger.warn("No network interface could be found.");
  97                 return null;
  98             }
  99
 100             // we do not use SSL as it can cause certificate validation issues.
 101             final int port = HttpServiceUtil.getHttpServicePort(bundleContext);
 102             if (port == -1) {
 103                 logger.warn("Cannot find port of the http service.");
 104                 return null;
 105             }
 106
 107             return "http://" + ipAddress + ":" + port;
 108         }
 109     }
 110
 111     @Override
 112     public void unregisterHandler(Thing thing) {
 113         super.unregisterHandler(thing);
 114         ServiceRegistration<AudioSink> reg = audioSinkRegistrations.get(thing.getUID().toString());
 115         reg.unregister();
 116     }
 117 }