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   1 /**
   2  * Copyright (c) 2010-2021 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.homematic.internal.communicator.virtual;
  14
  15 import static org.openhab.binding.homematic.internal.misc.HomematicConstants.VIRTUAL_DATAPOINT_NAME_BUTTON;
  16
  17 import org.openhab.binding.homematic.internal.misc.MiscUtils;
  18 import org.openhab.binding.homematic.internal.model.HmChannel;
  19 import org.openhab.binding.homematic.internal.model.HmDatapoint;
  20 import org.openhab.binding.homematic.internal.model.HmDevice;
  21 import org.openhab.binding.homematic.internal.model.HmValueType;
  22 import org.openhab.core.thing.CommonTriggerEvents;
  23 import org.openhab.core.thing.DefaultSystemChannelTypeProvider;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 /**
  28  * A virtual String datapoint which adds a BUTTON datapoint. It will forward key events to the
  29  * system channel {@link DefaultSystemChannelTypeProvider#SYSTEM_BUTTON}.
  30  *
  31  * @author Michael Reitler - Initial contribution
  32  */
  33 public class ButtonVirtualDatapointHandler extends AbstractVirtualDatapointHandler {
  34     private final Logger logger = LoggerFactory.getLogger(ButtonVirtualDatapointHandler.class);
  35
  36     private static final String LONG_REPEATED_EVENT = "LONG_REPEATED";
  37     private static final String LONG_RELEASED_EVENT = "LONG_RELEASED";
  38
  39     @Override
  40     public String getName() {
  41         return VIRTUAL_DATAPOINT_NAME_BUTTON;
  42     }
  43
  44     @Override
  45     public void initialize(HmDevice device) {
  46         for (HmChannel channel : device.getChannels()) {
  47             if (channel.hasPressDatapoint()) {
  48                 HmDatapoint dp = addDatapoint(device, channel.getNumber(), getName(), HmValueType.STRING, null, false);
  49                 dp.setTrigger(true);
  50                 dp.setOptions(new String[] { CommonTriggerEvents.SHORT_PRESSED, CommonTriggerEvents.LONG_PRESSED,
  51                         LONG_REPEATED_EVENT, LONG_RELEASED_EVENT });
  52             }
  53         }
  54     }
  55
  56     @Override
  57     public boolean canHandleEvent(HmDatapoint dp) {
  58         return dp.isPressDatapoint();
  59     }
  60
  61     @Override
  62     public void handleEvent(VirtualGateway gateway, HmDatapoint dp) {
  63         HmChannel channel = dp.getChannel();
  64         HmDatapoint vdp = getVirtualDatapoint(channel);
  65         int usPos = dp.getName().indexOf("_");
  66         String pressType = usPos == -1 ? dp.getName() : dp.getName().substring(usPos + 1);
  67         boolean isLongPressActive = CommonTriggerEvents.LONG_PRESSED.equals(vdp.getValue())
  68                 || LONG_REPEATED_EVENT.equals(vdp.getValue());
  69         if (MiscUtils.isTrueValue(dp.getValue())) {
  70             switch (pressType) {
  71                 case "SHORT": {
  72                     vdp.setValue(null); // Force sending new event
  73                     vdp.setValue(CommonTriggerEvents.SHORT_PRESSED);
  74                     break;
  75                 }
  76                 case "LONG":
  77                     if (LONG_REPEATED_EVENT.equals(vdp.getValue())) {
  78                         // Suppress long press events during an ongoing long press
  79                         vdp.setValue(LONG_REPEATED_EVENT);
  80                     } else {
  81                         vdp.setValue(CommonTriggerEvents.LONG_PRESSED);
  82                     }
  83                     break;
  84                 case "LONG_RELEASE":
  85                     // Only send release events if we sent a pressed event before
  86                     vdp.setValue(isLongPressActive ? LONG_RELEASED_EVENT : null);
  87                     break;
  88                 case "CONT":
  89                     // Clear previous value to force re-triggering of repetition
  90                     vdp.setValue(null);
  91                     // Only send repetitions if there was a pressed event before
  92                     // (a CONT might arrive simultaneously with the initial LONG event)
  93                     if (isLongPressActive) {
  94                         vdp.setValue(LONG_REPEATED_EVENT);
  95                     }
  96                     break;
  97                 default:
  98                     vdp.setValue(null);
  99                     logger.warn("Unexpected vaule '{}' for PRESS virtual datapoint", pressType);
 100             }
 101         } else {
 102             if ("LONG".equals(pressType) && LONG_REPEATED_EVENT.equals(vdp.getValue())) {
 103                 // If we're currently processing a repeated long-press event, don't let the initial LONG
 104                 // event time out the repetitions, the CONT delay handler will take care of it
 105                 vdp.setValue(LONG_REPEATED_EVENT);
 106             } else if (isLongPressActive) {
 107                 // We seemingly missed an event (either a CONT or the final LONG_RELEASE),
 108                 // so end the long press cycle now
 109                 vdp.setValue(LONG_RELEASED_EVENT);
 110             } else {
 111                 vdp.setValue(null);
 112             }
 113         }
 114         logger.debug("Handled virtual button event on {}:{}: press type {}, value {}, button state {} -> {}",
 115                 channel.getDevice().getAddress(), channel.getNumber(), pressType, dp.getValue(), vdp.getPreviousValue(),
 116                 vdp.getValue());
 117     }
 118 }