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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 static org.openhab.binding.amplipi.internal.AmpliPiBindingConstants.*;
  16
  17 import java.util.ArrayList;
  18 import java.util.Collection;
  19 import java.util.List;
  20 import java.util.Map;
  21 import java.util.Set;
  22 import java.util.concurrent.ExecutionException;
  23 import java.util.concurrent.ScheduledFuture;
  24 import java.util.concurrent.TimeUnit;
  25 import java.util.concurrent.TimeoutException;
  26
  27 import org.eclipse.jdt.annotation.NonNullByDefault;
  28 import org.eclipse.jdt.annotation.Nullable;
  29 import org.eclipse.jetty.client.HttpClient;
  30 import org.eclipse.jetty.client.api.ContentResponse;
  31 import org.eclipse.jetty.client.util.StringContentProvider;
  32 import org.eclipse.jetty.http.HttpMethod;
  33 import org.eclipse.jetty.http.HttpStatus;
  34 import org.openhab.binding.amplipi.internal.discovery.AmpliPiZoneAndGroupDiscoveryService;
  35 import org.openhab.binding.amplipi.internal.model.Preset;
  36 import org.openhab.binding.amplipi.internal.model.SourceUpdate;
  37 import org.openhab.binding.amplipi.internal.model.Status;
  38 import org.openhab.binding.amplipi.internal.model.Stream;
  39 import org.openhab.core.library.types.DecimalType;
  40 import org.openhab.core.library.types.StringType;
  41 import org.openhab.core.thing.Bridge;
  42 import org.openhab.core.thing.ChannelUID;
  43 import org.openhab.core.thing.Thing;
  44 import org.openhab.core.thing.ThingStatus;
  45 import org.openhab.core.thing.ThingStatusDetail;
  46 import org.openhab.core.thing.binding.BaseBridgeHandler;
  47 import org.openhab.core.thing.binding.ThingHandlerService;
  48 import org.openhab.core.types.Command;
  49 import org.openhab.core.types.RefreshType;
  50 import org.openhab.core.types.UnDefType;
  51 import org.slf4j.Logger;
  52 import org.slf4j.LoggerFactory;
  53
  54 import com.google.gson.Gson;
  55
  56 /**
  57  * The {@link AmpliPiHandler} is responsible for handling commands, which are
  58  * sent to one of the channels.
  59  *
  60  * @author Kai Kreuzer - Initial contribution
  61  */
  62 @NonNullByDefault
  63 public class AmpliPiHandler extends BaseBridgeHandler {
  64
  65     private static final int REQUEST_TIMEOUT = 5000;
  66
  67     private final Logger logger = LoggerFactory.getLogger(AmpliPiHandler.class);
  68
  69     private final HttpClient httpClient;
  70     private final Gson gson;
  71
  72     private String url = "http://amplipi";
  73     private List<Preset> presets = List.of();
  74     private List<Stream> streams = List.of();
  75     private List<AmpliPiStatusChangeListener> changeListeners = new ArrayList<>();
  76
  77     private @Nullable ScheduledFuture<?> refreshJob;
  78
  79     public AmpliPiHandler(Thing thing, HttpClient httpClient) {
  80         super((Bridge) thing);
  81         this.httpClient = httpClient;
  82         this.gson = new Gson();
  83     }
  84
  85     @Override
  86     public void handleCommand(ChannelUID channelUID, Command command) {
  87         AmpliPiConfiguration config = getConfigAs(AmpliPiConfiguration.class);
  88         url = "http://" + config.hostname;
  89
  90         if (CHANNEL_PRESET.equals(channelUID.getId())) {
  91             if (command instanceof RefreshType) {
  92                 updateState(channelUID, UnDefType.NULL);
  93             } else if (command instanceof DecimalType) {
  94                 DecimalType preset = (DecimalType) command;
  95                 try {
  96                     ContentResponse response = this.httpClient
  97                             .newRequest(url + "/api/presets/" + preset.intValue() + "/load").method(HttpMethod.POST)
  98                             .timeout(REQUEST_TIMEOUT, TimeUnit.MILLISECONDS).send();
  99                     if (response.getStatus() != HttpStatus.OK_200) {
 100                         logger.error("AmpliPi API returned HTTP status {}.", response.getStatus());
 101                         logger.debug("Content: {}", response.getContentAsString());
 102                     }
 103                 } catch (InterruptedException | TimeoutException | ExecutionException e) {
 104                     updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 105                             "AmpliPi request failed: " + e.getMessage());
 106                 }
 107             }
 108         } else if (channelUID.getId().startsWith(CHANNEL_INPUT)) {
 109             if (command instanceof StringType) {
 110                 StringType input = (StringType) command;
 111                 int source = Integer.valueOf(channelUID.getId().substring(CHANNEL_INPUT.length())) - 1;
 112                 SourceUpdate update = new SourceUpdate();
 113                 update.setInput(input.toString());
 114                 try {
 115                     StringContentProvider contentProvider = new StringContentProvider(gson.toJson(update));
 116                     ContentResponse response = this.httpClient.newRequest(url + "/api/sources/" + source)
 117                             .method(HttpMethod.PATCH).content(contentProvider, "application/json")
 118                             .timeout(REQUEST_TIMEOUT, TimeUnit.MILLISECONDS).send();
 119                     if (response.getStatus() != HttpStatus.OK_200) {
 120                         logger.error("AmpliPi API returned HTTP status {}.", response.getStatus());
 121                         logger.debug("Content: {}", response.getContentAsString());
 122                     }
 123                 } catch (InterruptedException | TimeoutException | ExecutionException e) {
 124                     updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 125                             "AmpliPi request failed: " + e.getMessage());
 126                 }
 127             }
 128         }
 129     }
 130
 131     @Override
 132     public void initialize() {
 133         AmpliPiConfiguration config = getConfigAs(AmpliPiConfiguration.class);
 134         url = "http://" + config.hostname;
 135
 136         updateStatus(ThingStatus.UNKNOWN);
 137
 138         refreshJob = scheduler.scheduleWithFixedDelay(() -> {
 139             try {
 140                 ContentResponse response = this.httpClient.newRequest(url + "/api")
 141                         .timeout(REQUEST_TIMEOUT, TimeUnit.MILLISECONDS).send();
 142                 if (response.getStatus() == HttpStatus.OK_200) {
 143                     Status currentStatus = this.gson.fromJson(response.getContentAsString(), Status.class);
 144                     if (currentStatus != null) {
 145                         updateStatus(ThingStatus.ONLINE);
 146                         setProperties(currentStatus);
 147                         setInputs(currentStatus);
 148                         presets = currentStatus.getPresets();
 149                         streams = currentStatus.getStreams();
 150                         changeListeners.forEach(l -> l.receive(currentStatus));
 151                     } else {
 152                         updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 153                                 "No valid response from AmpliPi API.");
 154                         logger.debug("Received response: {}", response.getContentAsString());
 155                     }
 156                 } else {
 157                     updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 158                             "AmpliPi API returned HTTP status " + response.getStatus() + ".");
 159                 }
 160             } catch (InterruptedException | TimeoutException | ExecutionException e) {
 161                 updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR,
 162                         "AmpliPi request failed: " + e.getMessage());
 163             } catch (Exception e) {
 164                 logger.error("Unexpected error occurred: {}", e.getMessage());
 165             }
 166         }, 0, config.refreshInterval, TimeUnit.SECONDS);
 167     }
 168
 169     private void setProperties(Status currentStatus) {
 170         String version = currentStatus.getInfo().getVersion();
 171         Map<String, String> props = editProperties();
 172         props.put(Thing.PROPERTY_FIRMWARE_VERSION, version);
 173         updateProperties(props);
 174     }
 175
 176     private void setInputs(Status currentStatus) {
 177         currentStatus.getSources().forEach(source -> {
 178             updateState(CHANNEL_INPUT + (source.getId() + 1), new StringType(source.getInput()));
 179         });
 180     }
 181
 182     @Override
 183     public void dispose() {
 184         if (refreshJob != null) {
 185             refreshJob.cancel(true);
 186             refreshJob = null;
 187         }
 188     }
 189
 190     @Override
 191     public Collection<Class<? extends ThingHandlerService>> getServices() {
 192         return Set.of(PresetCommandOptionProvider.class, InputStateOptionProvider.class,
 193                 AmpliPiZoneAndGroupDiscoveryService.class);
 194     }
 195
 196     public List<Preset> getPresets() {
 197         return presets;
 198     }
 199
 200     public List<Stream> getStreams() {
 201         return streams;
 202     }
 203
 204     public String getUrl() {
 205         return url;
 206     }
 207
 208     public void addStatusChangeListener(AmpliPiStatusChangeListener listener) {
 209         changeListeners.add(listener);
 210     }
 211
 212     public void removeStatusChangeListener(AmpliPiStatusChangeListener listener) {
 213         changeListeners.remove(listener);
 214     }
 215 }