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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.avmfritz.internal.handler;
  14
  15 import static org.openhab.binding.avmfritz.internal.AVMFritzBindingConstants.*;
  16
  17 import java.time.Instant;
  18 import java.time.ZoneId;
  19 import java.time.ZonedDateTime;
  20 import java.util.List;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.openhab.binding.avmfritz.internal.dto.AVMFritzBaseModel;
  24 import org.openhab.binding.avmfritz.internal.dto.ButtonModel;
  25 import org.openhab.binding.avmfritz.internal.dto.DeviceModel;
  26 import org.openhab.core.library.types.DateTimeType;
  27 import org.openhab.core.thing.Channel;
  28 import org.openhab.core.thing.CommonTriggerEvents;
  29 import org.openhab.core.thing.Thing;
  30 import org.openhab.core.thing.ThingUID;
  31 import org.openhab.core.types.UnDefType;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 /**
  36  * Handler for a FRITZ! buttons. Handles commands, which are sent to one of the channels.
  37  *
  38  * @author Christoph Weitkamp - Initial contribution
  39  */
  40 @NonNullByDefault
  41 public class AVMFritzButtonHandler extends DeviceHandler {
  42
  43     private final Logger logger = LoggerFactory.getLogger(AVMFritzButtonHandler.class);
  44     /**
  45      * keeps track of the last timestamp for handling trigger events
  46      */
  47     private Instant lastTimestamp;
  48
  49     /**
  50      * Constructor
  51      *
  52      * @param thing Thing object representing a FRITZ! button
  53      */
  54     public AVMFritzButtonHandler(Thing thing) {
  55         super(thing);
  56         lastTimestamp = Instant.now();
  57     }
  58
  59     @Override
  60     public void onDeviceUpdated(ThingUID thingUID, AVMFritzBaseModel device) {
  61         if (thing.getUID().equals(thingUID)) {
  62             super.onDeviceUpdated(thingUID, device);
  63
  64             if (device instanceof DeviceModel) {
  65                 DeviceModel deviceModel = (DeviceModel) device;
  66                 if (deviceModel.isHANFUNButton()) {
  67                     updateHANFUNButton(deviceModel.getButtons());
  68                 }
  69                 if (deviceModel.isButton()) {
  70                     updateShortLongPressButton(deviceModel.getButtons());
  71                     updateBattery(deviceModel);
  72                 }
  73             }
  74         }
  75     }
  76
  77     private void updateShortLongPressButton(List<ButtonModel> buttons) {
  78         ButtonModel shortPressButton = buttons.size() > 0 ? buttons.get(0) : null;
  79         ButtonModel longPressButton = buttons.size() > 1 ? buttons.get(1) : null;
  80         ButtonModel lastPressedButton = shortPressButton != null && (longPressButton == null
  81                 || shortPressButton.getLastpressedtimestamp() > longPressButton.getLastpressedtimestamp())
  82                         ? shortPressButton
  83                         : longPressButton;
  84         if (lastPressedButton != null) {
  85             updateButton(lastPressedButton,
  86                     lastPressedButton.equals(shortPressButton) ? CommonTriggerEvents.SHORT_PRESSED
  87                             : CommonTriggerEvents.LONG_PRESSED);
  88         }
  89     }
  90
  91     private void updateHANFUNButton(List<ButtonModel> buttons) {
  92         if (!buttons.isEmpty()) {
  93             updateButton(buttons.get(0), CommonTriggerEvents.PRESSED);
  94         }
  95     }
  96
  97     private void updateButton(ButtonModel buttonModel, String event) {
  98         int lastPressedTimestamp = buttonModel.getLastpressedtimestamp();
  99         if (lastPressedTimestamp == 0) {
 100             updateThingChannelState(CHANNEL_LAST_CHANGE, UnDefType.UNDEF);
 101         } else {
 102             ZonedDateTime timestamp = ZonedDateTime.ofInstant(Instant.ofEpochSecond(lastPressedTimestamp),
 103                     ZoneId.systemDefault());
 104             Instant then = timestamp.toInstant();
 105             // Avoid dispatching events if "lastpressedtimestamp" is older than now "lastTimestamp" (e.g. during
 106             // restart)
 107             if (then.isAfter(lastTimestamp)) {
 108                 lastTimestamp = then;
 109                 triggerThingChannel(CHANNEL_PRESS, event);
 110             }
 111             updateThingChannelState(CHANNEL_LAST_CHANGE, new DateTimeType(timestamp));
 112         }
 113     }
 114
 115     /**
 116      * Triggers thing channels.
 117      *
 118      * @param channelId ID of the channel to be triggered.
 119      * @param event Event to emit
 120      */
 121     private void triggerThingChannel(String channelId, String event) {
 122         Channel channel = thing.getChannel(channelId);
 123         if (channel != null) {
 124             triggerChannel(channel.getUID(), event);
 125         } else {
 126             logger.debug("Channel '{}' in thing '{}' does not exist.", channelId, thing.getUID());
 127         }
 128     }
 129 }