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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.velbus.internal.handler;
  14
  15 import static org.openhab.binding.velbus.internal.VelbusBindingConstants.*;
  16
  17 import java.util.Arrays;
  18 import java.util.HashSet;
  19 import java.util.Set;
  20
  21 import org.eclipse.jdt.annotation.NonNullByDefault;
  22 import org.openhab.binding.velbus.internal.VelbusChannelIdentifier;
  23 import org.openhab.binding.velbus.internal.packets.VelbusPacket;
  24 import org.openhab.binding.velbus.internal.packets.VelbusRelayPacket;
  25 import org.openhab.binding.velbus.internal.packets.VelbusStatusRequestPacket;
  26 import org.openhab.core.library.types.OnOffType;
  27 import org.openhab.core.thing.ChannelUID;
  28 import org.openhab.core.thing.Thing;
  29 import org.openhab.core.thing.ThingStatus;
  30 import org.openhab.core.thing.ThingStatusDetail;
  31 import org.openhab.core.thing.ThingTypeUID;
  32 import org.openhab.core.types.Command;
  33 import org.openhab.core.types.RefreshType;
  34
  35 /**
  36  * The {@link VelbusRelayHandler} is responsible for handling commands, which are
  37  * sent to one of the channels.
  38  *
  39  * @author Cedric Boon - Initial contribution
  40  */
  41 @NonNullByDefault
  42 public class VelbusRelayHandler extends VelbusThingHandler {
  43     public static final Set<ThingTypeUID> SUPPORTED_THING_TYPES = new HashSet<>(Arrays.asList(THING_TYPE_VMB1RY,
  44             THING_TYPE_VMB1RYNO, THING_TYPE_VMB1RYNOS, THING_TYPE_VMB4RY, THING_TYPE_VMB4RYLD, THING_TYPE_VMB4RYNO));
  45
  46     public VelbusRelayHandler(Thing thing) {
  47         super(thing, 0);
  48     }
  49
  50     @Override
  51     public void handleCommand(ChannelUID channelUID, Command command) {
  52         VelbusBridgeHandler velbusBridgeHandler = getVelbusBridgeHandler();
  53         if (velbusBridgeHandler == null) {
  54             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.BRIDGE_OFFLINE);
  55             return;
  56         }
  57
  58         if (command instanceof RefreshType) {
  59             VelbusStatusRequestPacket packet = new VelbusStatusRequestPacket(
  60                     getModuleAddress().getChannelIdentifier(channelUID));
  61
  62             byte[] packetBytes = packet.getBytes();
  63             velbusBridgeHandler.sendPacket(packetBytes);
  64         } else if (command instanceof OnOffType) {
  65             byte commandByte = determineCommandByte((OnOffType) command);
  66
  67             VelbusRelayPacket packet = new VelbusRelayPacket(getModuleAddress().getChannelIdentifier(channelUID),
  68                     commandByte);
  69
  70             byte[] packetBytes = packet.getBytes();
  71             velbusBridgeHandler.sendPacket(packetBytes);
  72         } else {
  73             logger.debug("The command '{}' is not supported by this handler.", command.getClass());
  74         }
  75     }
  76
  77     private byte determineCommandByte(OnOffType command) {
  78         return (command == OnOffType.ON) ? COMMAND_SWITCH_RELAY_ON : COMMAND_SWITCH_RELAY_OFF;
  79     }
  80
  81     @Override
  82     public void onPacketReceived(byte[] packet) {
  83         logger.trace("onPacketReceived() was called");
  84
  85         if (packet[0] == VelbusPacket.STX && packet.length >= 5) {
  86             byte command = packet[4];
  87
  88             if (command == COMMAND_RELAY_STATUS && packet.length >= 7) {
  89                 byte address = packet[2];
  90                 byte channel = packet[5];
  91                 boolean on = packet[7] != 0x00;
  92
  93                 VelbusChannelIdentifier velbusChannelIdentifier = new VelbusChannelIdentifier(address, channel);
  94                 OnOffType state = on ? OnOffType.ON : OnOffType.OFF;
  95                 updateState(getModuleAddress().getChannelId(velbusChannelIdentifier), state);
  96             }
  97         }
  98     }
  99 }