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   1 /**
   2  * Copyright (c) 2010-2023 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.sensorcommunity.internal.handler;
  14
  15 import static org.openhab.binding.sensorcommunity.internal.utils.Constants.*;
  16
  17 import java.time.LocalDateTime;
  18 import java.util.List;
  19 import java.util.Objects;
  20 import java.util.concurrent.TimeUnit;
  21
  22 import org.eclipse.jdt.annotation.NonNullByDefault;
  23 import org.eclipse.jdt.annotation.Nullable;
  24 import org.eclipse.jetty.client.HttpClient;
  25 import org.eclipse.jetty.client.api.Request;
  26 import org.eclipse.jetty.client.util.BufferingResponseListener;
  27 import org.openhab.binding.sensorcommunity.internal.dto.SensorData;
  28 import org.openhab.binding.sensorcommunity.internal.dto.SensorDataValue;
  29 import org.openhab.binding.sensorcommunity.internal.utils.DateTimeUtils;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 import com.google.gson.Gson;
  34
  35 /**
  36  * The {@link HTTPHandler} is responsible for HTTP requests and JSON handling
  37  *
  38  * @author Bernd Weymann - Initial contribution
  39  */
  40 @NonNullByDefault
  41 public class HTTPHandler {
  42     private final Logger logger = LoggerFactory.getLogger(HTTPHandler.class);
  43
  44     private static final Gson GSON = new Gson();
  45     private static final HTTPHandler HTTP_HANDLER = new HTTPHandler();
  46
  47     private static @Nullable HttpClient commonHttpClient;
  48
  49     public static void init(HttpClient httpClient) {
  50         commonHttpClient = httpClient;
  51     }
  52
  53     public static HTTPHandler getHandler() {
  54         return HTTP_HANDLER;
  55     }
  56
  57     public synchronized void request(String url, BaseSensorHandler callback) {
  58         HttpClient localClient = commonHttpClient;
  59         if (localClient == null) {
  60             logger.warn("HTTP Client not initialized");
  61         } else {
  62             Request req = localClient.newRequest(url);
  63             req.timeout(15, TimeUnit.SECONDS).send(new BufferingResponseListener() {
  64                 @NonNullByDefault({})
  65                 @Override
  66                 public void onComplete(org.eclipse.jetty.client.api.Result result) {
  67                     if (result.getResponse().getStatus() != 200) {
  68                         String failure;
  69                         if (result.getResponse().getReason() != null) {
  70                             failure = result.getResponse().getReason();
  71                         } else {
  72                             failure = result.getFailure().getMessage();
  73                         }
  74                         callback.onError(Objects.requireNonNullElse(failure, "Unknown error"));
  75                     } else {
  76                         callback.onResponse(getContentAsString());
  77                     }
  78                 }
  79             });
  80         }
  81     }
  82
  83     public @Nullable List<SensorDataValue> getLatestValues(String response) {
  84         SensorData[] valueArray = GSON.fromJson(response, SensorData[].class);
  85         if (valueArray.length == 0) {
  86             return null;
  87         } else if (valueArray.length == 1) {
  88             SensorData v = valueArray[0];
  89             return v.getSensorDataValues();
  90         } else if (valueArray.length > 1) {
  91             // declare first item as latest
  92             SensorData latestData = valueArray[0];
  93             String latestTimeStr = latestData.getTimeStamp();
  94             LocalDateTime latestTime = DateTimeUtils.toDate(latestTimeStr);
  95             if (latestTime == null) {
  96                 logDateConversionError(response, latestData);
  97             }
  98             for (int i = 1; i < valueArray.length; i++) {
  99                 SensorData iterData = valueArray[i];
 100                 String iterTimeStr = iterData.getTimeStamp();
 101                 LocalDateTime iterTime = DateTimeUtils.toDate(iterTimeStr);
 102                 if (iterTime == null) {
 103                     logDateConversionError(response, latestData);
 104                 }
 105                 if (iterTime != null && latestTime != null) {
 106                     if (latestTime.isBefore(iterTime)) {
 107                         // found item is newer - take it as latest
 108                         latestTime = iterTime;
 109                         latestData = iterData;
 110                     } // else - found item is older - nothing to do
 111                 } else {
 112                     logger.warn("One or two dates cannot be decoded 1) {} 2) {}", iterTimeStr, latestTimeStr);
 113                 }
 114             }
 115             return latestData.getSensorDataValues();
 116         } else {
 117             return null;
 118         }
 119     }
 120
 121     public void logDateConversionError(final String response, final Object dto) {
 122         logger.warn("Unable to get timestamp");
 123         logger.warn("Response: {}", response);
 124         String json = GSON.toJson(dto);
 125         logger.warn("GSon: {}", json);
 126     }
 127
 128     public boolean isParticulate(@Nullable List<SensorDataValue> valueList) {
 129         if (valueList == null) {
 130             return false;
 131         }
 132         return valueList.stream().map(v -> v.getValueType()).filter(t -> t.endsWith(P1) || t.endsWith(P2)).findAny()
 133                 .isPresent();
 134     }
 135
 136     public boolean isCondition(@Nullable List<SensorDataValue> valueList) {
 137         if (valueList == null) {
 138             return false;
 139         }
 140         return valueList.stream().map(v -> v.getValueType()).filter(t -> t.equals(TEMPERATURE) || t.endsWith(HUMIDITY)
 141                 || t.endsWith(PRESSURE) || t.endsWith(PRESSURE_SEALEVEL)).findAny().isPresent();
 142     }
 143
 144     public boolean isNoise(@Nullable List<SensorDataValue> valueList) {
 145         if (valueList == null) {
 146             return false;
 147         }
 148         return valueList.stream().map(v -> v.getValueType())
 149                 .filter(t -> t.endsWith(NOISE_EQ) || t.endsWith(NOISE_MAX) || t.endsWith(NOISE_MIN)).findAny()
 150                 .isPresent();
 151     }
 152 }