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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.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.NonNull;
  20 import org.eclipse.jdt.annotation.NonNullByDefault;
  21 import org.eclipse.jdt.annotation.Nullable;
  22 import org.eclipse.jetty.client.HttpClient;
  23 import org.eclipse.jetty.client.api.ContentResponse;
  24 import org.eclipse.jetty.client.util.StringContentProvider;
  25 import org.eclipse.jetty.http.HttpMethod;
  26 import org.eclipse.jetty.http.HttpStatus;
  27 import org.openhab.binding.amplipi.internal.model.Status;
  28 import org.openhab.binding.amplipi.internal.model.Zone;
  29 import org.openhab.binding.amplipi.internal.model.ZoneUpdate;
  30 import org.openhab.core.library.types.DecimalType;
  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     public AmpliPiZoneHandler(Thing thing, HttpClient httpClient) {
  63         super(thing);
  64         this.httpClient = httpClient;
  65         this.gson = new Gson();
  66     }
  67
  68     @Override
  69     public void initialize() {
  70         Bridge bridge = getBridge();
  71         if (bridge != null) {
  72             bridgeHandler = (AmpliPiHandler) bridge.getHandler();
  73             if (bridgeHandler != null) {
  74                 bridgeHandler.addStatusChangeListener(this);
  75             } else {
  76                 throw new IllegalStateException("Bridge handler must not be null here!");
  77             }
  78             if (bridge.getStatus() == ThingStatus.ONLINE) {
  79                 updateStatus(ThingStatus.ONLINE);
  80             } else {
  81                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.BRIDGE_OFFLINE);
  82             }
  83         } else {
  84             throw new IllegalStateException("Bridge must not be null here!");
  85         }
  86     }
  87
  88     private int getId(Thing thing) {
  89         return Integer.valueOf(thing.getConfiguration().get(AmpliPiBindingConstants.CFG_PARAM_ID).toString());
  90     }
  91
  92     @Override
  93     public void handleCommand(@NonNull ChannelUID channelUID, @NonNull Command command) {
  94         if (command == RefreshType.REFRESH) {
  95             // do nothing - we just wait for the next automatic refresh
  96             return;
  97         }
  98         ZoneUpdate update = new ZoneUpdate();
  99         switch (channelUID.getId()) {
 100             case AmpliPiBindingConstants.CHANNEL_MUTE:
 101                 if (command instanceof OnOffType) {
 102                     update.setMute(command == OnOffType.ON);
 103                 }
 104                 break;
 105             case AmpliPiBindingConstants.CHANNEL_VOLUME:
 106                 if (command instanceof PercentType) {
 107                     update.setVol(AmpliPiUtils.percentTypeToVolume((PercentType) command));
 108                 }
 109                 break;
 110             case AmpliPiBindingConstants.CHANNEL_SOURCE:
 111                 if (command instanceof DecimalType) {
 112                     update.setSourceId(((DecimalType) command).intValue());
 113                 }
 114                 break;
 115         }
 116         if (bridgeHandler != null) {
 117             String url = bridgeHandler.getUrl() + "/api/zones/" + getId(thing);
 118             StringContentProvider contentProvider = new StringContentProvider(gson.toJson(update));
 119             try {
 120                 ContentResponse response = httpClient.newRequest(url).method(HttpMethod.PATCH)
 121                         .content(contentProvider, "application/json").send();
 122                 if (response.getStatus() != HttpStatus.OK_200) {
 123                     logger.error("AmpliPi API returned HTTP status {}.", response.getStatus());
 124                     logger.debug("Content: {}", response.getContentAsString());
 125                 } else {
 126                     updateStatus(ThingStatus.ONLINE);
 127                 }
 128             } catch (InterruptedException | TimeoutException | ExecutionException e) {
 129                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 130                         "AmpliPi request failed: " + e.getMessage());
 131             }
 132         }
 133     }
 134
 135     @Override
 136     public void receive(@NonNull Status status) {
 137         int id = getId(thing);
 138         Optional<Zone> zone = status.getZones().stream().filter(z -> z.getId().equals(id)).findFirst();
 139         if (zone.isPresent()) {
 140             Boolean mute = zone.get().getMute();
 141             Integer volume = zone.get().getVol();
 142             Integer source = zone.get().getSourceId();
 143             updateState(AmpliPiBindingConstants.CHANNEL_MUTE, mute ? OnOffType.ON : OnOffType.OFF);
 144             updateState(AmpliPiBindingConstants.CHANNEL_VOLUME, AmpliPiUtils.volumeToPercentType(volume));
 145             updateState(AmpliPiBindingConstants.CHANNEL_SOURCE, new DecimalType(source));
 146         }
 147     }
 148 }