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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.minecraft.internal.handler;
  14
  15 import org.openhab.binding.minecraft.internal.MinecraftBindingConstants;
  16 import org.openhab.binding.minecraft.internal.config.SignConfig;
  17 import org.openhab.binding.minecraft.internal.message.OHMessage;
  18 import org.openhab.binding.minecraft.internal.message.data.SignData;
  19 import org.openhab.binding.minecraft.internal.message.data.commands.SignCommandData;
  20 import org.openhab.core.library.types.OnOffType;
  21 import org.openhab.core.thing.Bridge;
  22 import org.openhab.core.thing.ChannelUID;
  23 import org.openhab.core.thing.Thing;
  24 import org.openhab.core.thing.ThingStatus;
  25 import org.openhab.core.thing.ThingStatusDetail;
  26 import org.openhab.core.thing.binding.BaseThingHandler;
  27 import org.openhab.core.thing.binding.ThingHandler;
  28 import org.openhab.core.types.Command;
  29 import org.openhab.core.types.State;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 import com.google.gson.Gson;
  34 import com.google.gson.GsonBuilder;
  35 import com.google.gson.JsonElement;
  36
  37 import rx.Observable;
  38 import rx.Subscription;
  39
  40 /**
  41  * The {@link MinecraftSignHandler} is responsible for handling commands, which are
  42  * sent to one of the channels.
  43  *
  44  * @author Mattias Markehed - Initial contribution
  45  */
  46 public class MinecraftSignHandler extends BaseThingHandler {
  47
  48     private Logger logger = LoggerFactory.getLogger(MinecraftSignHandler.class);
  49
  50     private MinecraftServerHandler bridgeHandler;
  51     private Subscription signSubscription;
  52     private SignConfig config;
  53
  54     private Gson gson = new GsonBuilder().create();
  55
  56     public MinecraftSignHandler(Thing thing) {
  57         super(thing);
  58     }
  59
  60     @Override
  61     public void initialize() {
  62         this.bridgeHandler = getBridgeHandler();
  63         this.config = getThing().getConfiguration().as(SignConfig.class);
  64
  65         if (getThing().getBridgeUID() == null) {
  66             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, "No bridge configured");
  67
  68             return;
  69         }
  70
  71         updateStatus(ThingStatus.ONLINE);
  72         hookupListeners(bridgeHandler);
  73     }
  74
  75     @Override
  76     public void dispose() {
  77         super.dispose();
  78         if (!signSubscription.isUnsubscribed()) {
  79             signSubscription.unsubscribe();
  80         }
  81     }
  82
  83     private String getSignName() {
  84         return config.getName();
  85     }
  86
  87     private void hookupListeners(MinecraftServerHandler bridgeHandler) {
  88         signSubscription = bridgeHandler.getSignsRx().flatMap(signs -> Observable.from(signs))
  89                 .filter(sign -> config.getName().equals(sign.getName())).subscribe(sign -> updateSignState(sign));
  90     }
  91
  92     /**
  93      * Updates sign state of player.
  94      *
  95      * @param sign the sign to update
  96      */
  97     private void updateSignState(SignData sign) {
  98         State activeState = sign.getState() ? OnOffType.ON : OnOffType.OFF;
  99         updateState(MinecraftBindingConstants.CHANNEL_SIGN_ACTIVE, activeState);
 100     }
 101
 102     private synchronized MinecraftServerHandler getBridgeHandler() {
 103         Bridge bridge = getBridge();
 104         if (bridge == null) {
 105             logger.debug("Required bridge not defined for device {}.", getThing().getUID());
 106             return null;
 107         } else {
 108             return getBridgeHandler(bridge);
 109         }
 110     }
 111
 112     private synchronized MinecraftServerHandler getBridgeHandler(Bridge bridge) {
 113         MinecraftServerHandler bridgeHandler = null;
 114
 115         ThingHandler handler = bridge.getHandler();
 116         if (handler instanceof MinecraftServerHandler) {
 117             bridgeHandler = (MinecraftServerHandler) handler;
 118         } else {
 119             logger.debug("No available bridge handler found yet. Bridge: {} .", bridge.getUID());
 120             bridgeHandler = null;
 121         }
 122         return bridgeHandler;
 123     }
 124
 125     @Override
 126     public void updateState(String channelID, State state) {
 127         ChannelUID channelUID = new ChannelUID(this.getThing().getUID(), channelID);
 128         updateState(channelUID, state);
 129     }
 130
 131     /**
 132      * Send a sign command to server.
 133      *
 134      * @param type the type of command to send
 135      * @param signName the sign that the command targets
 136      * @param value the value related to command
 137      */
 138     private void sendSignCommand(String type, String signName, String value) {
 139         SignCommandData signCommand = new SignCommandData(type, signName, value);
 140         JsonElement serializedCommand = gson.toJsonTree(signCommand);
 141         bridgeHandler.sendMessage(new OHMessage(OHMessage.MESSAGE_TYPE_SIGN_COMMANDS, serializedCommand));
 142     }
 143
 144     @Override
 145     public void handleCommand(ChannelUID channelUID, Command command) {
 146         switch (channelUID.getId()) {
 147             case MinecraftBindingConstants.CHANNEL_SIGN_ACTIVE:
 148                 Boolean activeState = command == OnOffType.ON ? true : false;
 149                 sendSignCommand(SignCommandData.COMMAND_SIGN_ACTIVE, getSignName(), activeState.toString());
 150         }
 151     }
 152 }