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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.awattar.internal.handler;
  14
  15 import static org.openhab.binding.awattar.internal.AwattarBindingConstants.BINDING_ID;
  16 import static org.openhab.binding.awattar.internal.AwattarBindingConstants.CHANNEL_GROUP_CURRENT;
  17 import static org.openhab.binding.awattar.internal.AwattarBindingConstants.CHANNEL_MARKET_GROSS;
  18 import static org.openhab.binding.awattar.internal.AwattarBindingConstants.CHANNEL_MARKET_NET;
  19 import static org.openhab.binding.awattar.internal.AwattarBindingConstants.CHANNEL_TOTAL_GROSS;
  20 import static org.openhab.binding.awattar.internal.AwattarBindingConstants.CHANNEL_TOTAL_NET;
  21 import static org.openhab.binding.awattar.internal.AwattarUtil.getCalendarForHour;
  22 import static org.openhab.binding.awattar.internal.AwattarUtil.getMillisToNextMinute;
  23
  24 import java.math.BigDecimal;
  25 import java.math.RoundingMode;
  26 import java.time.ZonedDateTime;
  27 import java.util.concurrent.ScheduledFuture;
  28 import java.util.concurrent.TimeUnit;
  29
  30 import org.eclipse.jdt.annotation.NonNullByDefault;
  31 import org.eclipse.jdt.annotation.Nullable;
  32 import org.openhab.binding.awattar.internal.AwattarPrice;
  33 import org.openhab.core.i18n.TimeZoneProvider;
  34 import org.openhab.core.library.types.DecimalType;
  35 import org.openhab.core.thing.Bridge;
  36 import org.openhab.core.thing.Channel;
  37 import org.openhab.core.thing.ChannelUID;
  38 import org.openhab.core.thing.Thing;
  39 import org.openhab.core.thing.ThingStatus;
  40 import org.openhab.core.thing.ThingStatusDetail;
  41 import org.openhab.core.thing.binding.BaseThingHandler;
  42 import org.openhab.core.thing.type.ChannelKind;
  43 import org.openhab.core.types.Command;
  44 import org.openhab.core.types.RefreshType;
  45 import org.openhab.core.types.State;
  46 import org.openhab.core.types.UnDefType;
  47 import org.slf4j.Logger;
  48 import org.slf4j.LoggerFactory;
  49
  50 /**
  51  * The {@link AwattarPriceHandler} is responsible for handling commands, which are
  52  * sent to one of the channels.
  53  *
  54  * @author Wolfgang Klimt - Initial contribution
  55  */
  56 @NonNullByDefault
  57 public class AwattarPriceHandler extends BaseThingHandler {
  58
  59     private final Logger logger = LoggerFactory.getLogger(AwattarPriceHandler.class);
  60
  61     private int thingRefreshInterval = 60;
  62     private TimeZoneProvider timeZoneProvider;
  63     private @Nullable ScheduledFuture<?> thingRefresher;
  64
  65     public AwattarPriceHandler(Thing thing, TimeZoneProvider timeZoneProvider) {
  66         super(thing);
  67         this.timeZoneProvider = timeZoneProvider;
  68     }
  69
  70     @Override
  71     public void handleCommand(ChannelUID channelUID, Command command) {
  72         if (command instanceof RefreshType) {
  73             refreshChannel(channelUID);
  74         } else {
  75             logger.debug("Binding {} only supports refresh command", BINDING_ID);
  76         }
  77     }
  78
  79     /**
  80      * Initialize the binding and start the refresh job.
  81      * The refresh job runs once after initialization and afterwards every hour.
  82      */
  83
  84     @Override
  85     public void initialize() {
  86         synchronized (this) {
  87             ScheduledFuture<?> localRefresher = thingRefresher;
  88             if (localRefresher == null || localRefresher.isCancelled()) {
  89                 /*
  90                  * The scheduler is required to run exactly at minute borders, hence we can't use scheduleWithFixedDelay
  91                  * here
  92                  */
  93                 thingRefresher = scheduler.scheduleAtFixedRate(this::refreshChannels,
  94                         getMillisToNextMinute(1, timeZoneProvider), thingRefreshInterval * 1000, TimeUnit.MILLISECONDS);
  95             }
  96         }
  97         updateStatus(ThingStatus.UNKNOWN);
  98     }
  99
 100     public void dispose() {
 101         ScheduledFuture<?> localRefresher = thingRefresher;
 102         if (localRefresher != null) {
 103             localRefresher.cancel(true);
 104             thingRefresher = null;
 105         }
 106     }
 107
 108     public void refreshChannels() {
 109         updateStatus(ThingStatus.ONLINE);
 110         for (Channel channel : getThing().getChannels()) {
 111             ChannelUID channelUID = channel.getUID();
 112             if (ChannelKind.STATE.equals(channel.getKind()) && channelUID.isInGroup() && channelUID.getGroupId() != null
 113                     && isLinked(channelUID)) {
 114                 refreshChannel(channel.getUID());
 115             }
 116         }
 117     }
 118
 119     public void refreshChannel(ChannelUID channelUID) {
 120         State state = UnDefType.UNDEF;
 121         Bridge bridge = getBridge();
 122         if (bridge == null) {
 123             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, "@text/error.bridge.missing");
 124             return;
 125         }
 126         AwattarBridgeHandler bridgeHandler = (AwattarBridgeHandler) bridge.getHandler();
 127         if (bridgeHandler == null) {
 128             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, "@text/error.bridge.missing");
 129             return;
 130         }
 131         String group = channelUID.getGroupId();
 132         if (group == null) {
 133             updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR,
 134                     "@text/error.channelgroup.missing");
 135             return;
 136         }
 137
 138         ZonedDateTime target;
 139
 140         if (group.equals(CHANNEL_GROUP_CURRENT)) {
 141             target = ZonedDateTime.now(bridgeHandler.getTimeZone());
 142         } else if (group.startsWith("today")) {
 143             target = getCalendarForHour(Integer.valueOf(group.substring(5)), bridgeHandler.getTimeZone());
 144         } else if (group.startsWith("tomorrow")) {
 145             target = getCalendarForHour(Integer.valueOf(group.substring(8)), bridgeHandler.getTimeZone()).plusDays(1);
 146         } else {
 147             logger.warn("Unsupported channel group {}", group);
 148             updateState(channelUID, state);
 149             return;
 150         }
 151
 152         AwattarPrice price = bridgeHandler.getPriceFor(target.toInstant().toEpochMilli());
 153
 154         if (price == null) {
 155             logger.trace("No price found for hour {}", target.toString());
 156             updateState(channelUID, state);
 157             return;
 158         }
 159         double currentprice = price.getPrice();
 160
 161         String channelId = channelUID.getIdWithoutGroup();
 162         switch (channelId) {
 163             case CHANNEL_MARKET_NET:
 164                 state = toDecimalType(currentprice);
 165                 break;
 166             case CHANNEL_MARKET_GROSS:
 167                 state = toDecimalType(currentprice * bridgeHandler.getVatFactor());
 168                 break;
 169             case CHANNEL_TOTAL_NET:
 170                 state = toDecimalType(currentprice + bridgeHandler.getBasePrice());
 171                 break;
 172             case CHANNEL_TOTAL_GROSS:
 173                 state = toDecimalType((currentprice + bridgeHandler.getBasePrice()) * bridgeHandler.getVatFactor());
 174                 break;
 175             default:
 176                 logger.warn("Unknown channel id {} for Thing type {}", channelUID, getThing().getThingTypeUID());
 177         }
 178         updateState(channelUID, state);
 179     }
 180
 181     private DecimalType toDecimalType(Double value) {
 182         BigDecimal bd = BigDecimal.valueOf(value);
 183         return new DecimalType(bd.setScale(2, RoundingMode.HALF_UP));
 184     }
 185 }