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   1 /**
   2  * Copyright (c) 2010-2024 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.amplipi.internal;
  14
  15 import java.util.Optional;
  16 import java.util.concurrent.ExecutionException;
  17 import java.util.concurrent.TimeoutException;
  18
  19 import org.eclipse.jdt.annotation.NonNullByDefault;
  20 import org.eclipse.jdt.annotation.Nullable;
  21 import org.eclipse.jetty.client.HttpClient;
  22 import org.eclipse.jetty.client.api.ContentResponse;
  23 import org.eclipse.jetty.client.util.StringContentProvider;
  24 import org.eclipse.jetty.http.HttpMethod;
  25 import org.eclipse.jetty.http.HttpStatus;
  26 import org.openhab.binding.amplipi.internal.model.Status;
  27 import org.openhab.binding.amplipi.internal.model.Zone;
  28 import org.openhab.binding.amplipi.internal.model.ZoneUpdate;
  29 import org.openhab.core.library.types.DecimalType;
  30 import org.openhab.core.library.types.IncreaseDecreaseType;
  31 import org.openhab.core.library.types.OnOffType;
  32 import org.openhab.core.library.types.PercentType;
  33 import org.openhab.core.thing.Bridge;
  34 import org.openhab.core.thing.ChannelUID;
  35 import org.openhab.core.thing.Thing;
  36 import org.openhab.core.thing.ThingStatus;
  37 import org.openhab.core.thing.ThingStatusDetail;
  38 import org.openhab.core.thing.binding.BaseThingHandler;
  39 import org.openhab.core.types.Command;
  40 import org.openhab.core.types.RefreshType;
  41 import org.slf4j.Logger;
  42 import org.slf4j.LoggerFactory;
  43
  44 import com.google.gson.Gson;
  45
  46 /**
  47  * The {@link AmpliPiGroupHandler} is responsible for handling commands, which are
  48  * sent to one of the AmpliPi Groups.
  49  *
  50  * @author Kai Kreuzer - Initial contribution
  51  */
  52 @NonNullByDefault
  53 public class AmpliPiZoneHandler extends BaseThingHandler implements AmpliPiStatusChangeListener {
  54
  55     private final Logger logger = LoggerFactory.getLogger(AmpliPiZoneHandler.class);
  56
  57     private final HttpClient httpClient;
  58     private final Gson gson;
  59
  60     private @Nullable AmpliPiHandler bridgeHandler;
  61
  62     private @Nullable Zone zoneState;
  63
  64     public AmpliPiZoneHandler(Thing thing, HttpClient httpClient) {
  65         super(thing);
  66         this.httpClient = httpClient;
  67         this.gson = new Gson();
  68     }
  69
  70     @Override
  71     public void initialize() {
  72         Bridge bridge = getBridge();
  73         if (bridge != null) {
  74             bridgeHandler = (AmpliPiHandler) bridge.getHandler();
  75             if (bridgeHandler != null) {
  76                 bridgeHandler.addStatusChangeListener(this);
  77             } else {
  78                 throw new IllegalStateException("Bridge handler must not be null here!");
  79             }
  80             if (bridge.getStatus() == ThingStatus.ONLINE) {
  81                 updateStatus(ThingStatus.ONLINE);
  82             } else {
  83                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.BRIDGE_OFFLINE);
  84             }
  85         } else {
  86             throw new IllegalStateException("Bridge must not be null here!");
  87         }
  88     }
  89
  90     private int getId(Thing thing) {
  91         return Integer.valueOf(thing.getConfiguration().get(AmpliPiBindingConstants.CFG_PARAM_ID).toString());
  92     }
  93
  94     private int getVolumeDelta(Thing thing) {
  95         return Integer.valueOf(thing.getConfiguration().get(AmpliPiBindingConstants.CFG_PARAM_VOLUME_DELTA).toString());
  96     }
  97
  98     @Override
  99     public void handleCommand(ChannelUID channelUID, Command command) {
 100         if (command == RefreshType.REFRESH) {
 101             // do nothing - we just wait for the next automatic refresh
 102             return;
 103         }
 104         ZoneUpdate update = new ZoneUpdate();
 105         switch (channelUID.getId()) {
 106             case AmpliPiBindingConstants.CHANNEL_MUTE:
 107                 if (command instanceof OnOffType) {
 108                     update.setMute(command == OnOffType.ON);
 109                 }
 110                 break;
 111             case AmpliPiBindingConstants.CHANNEL_VOLUME:
 112                 if (command instanceof PercentType percentCommand) {
 113                     update.setVol(AmpliPiUtils.percentTypeToVolume(percentCommand));
 114                 } else if (command instanceof IncreaseDecreaseType) {
 115                     if (zoneState != null) {
 116                         if (IncreaseDecreaseType.INCREASE.equals(command)) {
 117                             zoneState.setVol(
 118                                     Math.min(zoneState.getVol() + getVolumeDelta(thing), AmpliPiUtils.MAX_VOLUME_DB));
 119                         } else {
 120                             zoneState.setVol(
 121                                     Math.max(zoneState.getVol() - getVolumeDelta(thing), AmpliPiUtils.MIN_VOLUME_DB));
 122                         }
 123                         update.setVol(zoneState.getVol());
 124                     }
 125                 }
 126                 break;
 127             case AmpliPiBindingConstants.CHANNEL_SOURCE:
 128                 if (command instanceof DecimalType decimalCommand) {
 129                     update.setSourceId(decimalCommand.intValue());
 130                 }
 131                 break;
 132         }
 133         if (bridgeHandler != null) {
 134             String url = bridgeHandler.getUrl() + "/api/zones/" + getId(thing);
 135             StringContentProvider contentProvider = new StringContentProvider(gson.toJson(update));
 136             try {
 137                 ContentResponse response = httpClient.newRequest(url).method(HttpMethod.PATCH)
 138                         .content(contentProvider, "application/json").send();
 139                 if (response.getStatus() != HttpStatus.OK_200) {
 140                     logger.error("AmpliPi API returned HTTP status {}.", response.getStatus());
 141                     logger.debug("Content: {}", response.getContentAsString());
 142                 } else {
 143                     updateStatus(ThingStatus.ONLINE);
 144                 }
 145             } catch (InterruptedException | TimeoutException | ExecutionException e) {
 146                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 147                         "AmpliPi request failed: " + e.getMessage());
 148             }
 149         }
 150     }
 151
 152     @Override
 153     public void receive(Status status) {
 154         int id = getId(thing);
 155         Optional<Zone> zone = status.getZones().stream().filter(z -> z.getId().equals(id)).findFirst();
 156         zone.ifPresent(this::updateZoneState);
 157     }
 158
 159     private void updateZoneState(Zone state) {
 160         this.zoneState = state;
 161
 162         Boolean mute = zoneState.getMute();
 163         Integer vol = zoneState.getVol();
 164         Integer sourceId = zoneState.getSourceId();
 165
 166         updateState(AmpliPiBindingConstants.CHANNEL_MUTE, OnOffType.from(mute));
 167         updateState(AmpliPiBindingConstants.CHANNEL_VOLUME, AmpliPiUtils.volumeToPercentType(vol));
 168         updateState(AmpliPiBindingConstants.CHANNEL_SOURCE, new DecimalType(sourceId));
 169     }
 170 }