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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.Group;
  28 import org.openhab.binding.amplipi.internal.model.GroupUpdate;
  29 import org.openhab.binding.amplipi.internal.model.Status;
  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 AmpliPiGroupHandler extends BaseThingHandler implements AmpliPiStatusChangeListener {
  54
  55     private final Logger logger = LoggerFactory.getLogger(AmpliPiGroupHandler.class);
  56
  57     private final HttpClient httpClient;
  58     private final Gson gson;
  59
  60     private @Nullable AmpliPiHandler bridgeHandler;
  61
  62     public AmpliPiGroupHandler(Thing thing, HttpClient httpClient) {
  63         super(thing);
  64         this.httpClient = httpClient;
  65         this.gson = new Gson();
  66     }
  67
  68     private int getId(Thing thing) {
  69         return Integer.valueOf(thing.getConfiguration().get(AmpliPiBindingConstants.CFG_PARAM_ID).toString());
  70     }
  71
  72     @Override
  73     public void initialize() {
  74         Bridge bridge = getBridge();
  75         if (bridge != null) {
  76             bridgeHandler = (AmpliPiHandler) bridge.getHandler();
  77             if (bridgeHandler != null) {
  78                 bridgeHandler.addStatusChangeListener(this);
  79             } else {
  80                 throw new IllegalStateException("Bridge handler must not be null here!");
  81             }
  82             if (bridge.getStatus() == ThingStatus.ONLINE) {
  83                 updateStatus(ThingStatus.ONLINE);
  84             } else {
  85                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.BRIDGE_OFFLINE);
  86             }
  87         } else {
  88             throw new IllegalStateException("Bridge must not be null here!");
  89         }
  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         GroupUpdate update = new GroupUpdate();
  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.setVolDelta(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/groups/" + getId(thing);
 118             ;
 119             StringContentProvider contentProvider = new StringContentProvider(gson.toJson(update));
 120             try {
 121                 ContentResponse response = httpClient.newRequest(url).method(HttpMethod.PATCH)
 122                         .content(contentProvider, "application/json").send();
 123                 if (response.getStatus() != HttpStatus.OK_200) {
 124                     logger.error("AmpliPi API returned HTTP status {}.", response.getStatus());
 125                     logger.debug("Content: {}", response.getContentAsString());
 126                 } else {
 127                     updateStatus(ThingStatus.ONLINE);
 128                 }
 129             } catch (InterruptedException | TimeoutException | ExecutionException e) {
 130                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 131                         "AmpliPi request failed: " + e.getMessage());
 132             }
 133         }
 134     }
 135
 136     @Override
 137     public void receive(@NonNull Status status) {
 138         int id = getId(thing);
 139         Optional<Group> group = status.getGroups().stream().filter(z -> z.getId().equals(id)).findFirst();
 140         if (group.isPresent()) {
 141             Boolean mute = group.get().getMute();
 142             Integer volume = group.get().getVolDelta();
 143             Integer source = group.get().getSourceId();
 144             updateState(AmpliPiBindingConstants.CHANNEL_MUTE, mute ? OnOffType.ON : OnOffType.OFF);
 145             updateState(AmpliPiBindingConstants.CHANNEL_VOLUME, AmpliPiUtils.volumeToPercentType(volume));
 146             updateState(AmpliPiBindingConstants.CHANNEL_SOURCE, new DecimalType(source));
 147         }
 148     }
 149 }