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   1 /**
   2  * Copyright (c) 2010-2022 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.Group;
  27 import org.openhab.binding.amplipi.internal.model.GroupUpdate;
  28 import org.openhab.binding.amplipi.internal.model.Status;
  29 import org.openhab.core.library.types.DecimalType;
  30 import org.openhab.core.library.types.OnOffType;
  31 import org.openhab.core.library.types.PercentType;
  32 import org.openhab.core.thing.Bridge;
  33 import org.openhab.core.thing.ChannelUID;
  34 import org.openhab.core.thing.Thing;
  35 import org.openhab.core.thing.ThingStatus;
  36 import org.openhab.core.thing.ThingStatusDetail;
  37 import org.openhab.core.thing.binding.BaseThingHandler;
  38 import org.openhab.core.types.Command;
  39 import org.openhab.core.types.RefreshType;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 import com.google.gson.Gson;
  44
  45 /**
  46  * The {@link AmpliPiGroupHandler} is responsible for handling commands, which are
  47  * sent to one of the AmpliPi Groups.
  48  *
  49  * @author Kai Kreuzer - Initial contribution
  50  */
  51 @NonNullByDefault
  52 public class AmpliPiGroupHandler extends BaseThingHandler implements AmpliPiStatusChangeListener {
  53
  54     private final Logger logger = LoggerFactory.getLogger(AmpliPiGroupHandler.class);
  55
  56     private final HttpClient httpClient;
  57     private final Gson gson;
  58
  59     private @Nullable AmpliPiHandler bridgeHandler;
  60
  61     public AmpliPiGroupHandler(Thing thing, HttpClient httpClient) {
  62         super(thing);
  63         this.httpClient = httpClient;
  64         this.gson = new Gson();
  65     }
  66
  67     private int getId(Thing thing) {
  68         return Integer.valueOf(thing.getConfiguration().get(AmpliPiBindingConstants.CFG_PARAM_ID).toString());
  69     }
  70
  71     @Override
  72     public void initialize() {
  73         Bridge bridge = getBridge();
  74         if (bridge != null) {
  75             bridgeHandler = (AmpliPiHandler) bridge.getHandler();
  76             if (bridgeHandler != null) {
  77                 bridgeHandler.addStatusChangeListener(this);
  78             } else {
  79                 throw new IllegalStateException("Bridge handler must not be null here!");
  80             }
  81             if (bridge.getStatus() == ThingStatus.ONLINE) {
  82                 updateStatus(ThingStatus.ONLINE);
  83             } else {
  84                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.BRIDGE_OFFLINE);
  85             }
  86         } else {
  87             throw new IllegalStateException("Bridge must not be null here!");
  88         }
  89     }
  90
  91     @Override
  92     public void handleCommand(ChannelUID channelUID, Command command) {
  93         if (command == RefreshType.REFRESH) {
  94             // do nothing - we just wait for the next automatic refresh
  95             return;
  96         }
  97         GroupUpdate update = new GroupUpdate();
  98         switch (channelUID.getId()) {
  99             case AmpliPiBindingConstants.CHANNEL_MUTE:
 100                 if (command instanceof OnOffType) {
 101                     update.setMute(command == OnOffType.ON);
 102                 }
 103                 break;
 104             case AmpliPiBindingConstants.CHANNEL_VOLUME:
 105                 if (command instanceof PercentType) {
 106                     update.setVolDelta(AmpliPiUtils.percentTypeToVolume((PercentType) command));
 107                 }
 108                 break;
 109             case AmpliPiBindingConstants.CHANNEL_SOURCE:
 110                 if (command instanceof DecimalType) {
 111                     update.setSourceId(((DecimalType) command).intValue());
 112                 }
 113                 break;
 114         }
 115         if (bridgeHandler != null) {
 116             String url = bridgeHandler.getUrl() + "/api/groups/" + getId(thing);
 117             ;
 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(Status status) {
 137         int id = getId(thing);
 138         Optional<Group> group = status.getGroups().stream().filter(z -> z.getId().equals(id)).findFirst();
 139         if (group.isPresent()) {
 140             Boolean mute = group.get().getMute();
 141             Integer volume = group.get().getVolDelta();
 142             Integer source = group.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 }