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   1 /**
   2  * Copyright (c) 2010-2020 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.luftdateninfo.internal.handler;
  14
  15 import java.time.LocalDateTime;
  16 import java.util.List;
  17 import java.util.concurrent.TimeUnit;
  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.Request;
  23 import org.eclipse.jetty.client.util.BufferingResponseListener;
  24 import org.openhab.binding.luftdateninfo.internal.dto.SensorData;
  25 import org.openhab.binding.luftdateninfo.internal.dto.SensorDataValue;
  26 import org.openhab.binding.luftdateninfo.internal.utils.DateTimeUtils;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 import com.google.gson.Gson;
  31
  32 /**
  33  * The {@link HTTPHandler} is responsible for HTTP requests and JSON handling
  34  *
  35  * @author Bernd Weymann - Initial contribution
  36  */
  37 @NonNullByDefault
  38 public class HTTPHandler {
  39     private final Logger logger = LoggerFactory.getLogger(HTTPHandler.class);
  40
  41     private static final Gson GSON = new Gson();
  42     private static final HTTPHandler HTTP_HANDLER = new HTTPHandler();
  43
  44     public static final String P1 = "P1";
  45     public static final String P2 = "P2";
  46
  47     public static final String TEMPERATURE = "temperature";
  48     public static final String HUMIDITY = "humidity";
  49     public static final String PRESSURE = "pressure";
  50     public static final String PRESSURE_SEALEVEL = "pressure_at_sealevel";
  51
  52     public static final String NOISE_EQ = "noise_LAeq";
  53     public static final String NOISE_MIN = "noise_LA_min";
  54     public static final String NOISE_MAX = "noise_LA_max";
  55
  56     private static String sensorUrl = "http://data.sensor.community/airrohr/v1/sensor/";
  57     private static @Nullable HttpClient commonHttpClient;
  58
  59     public static void init(HttpClient httpClient) {
  60         commonHttpClient = httpClient;
  61     }
  62
  63     public static HTTPHandler getHandler() {
  64         return HTTP_HANDLER;
  65     }
  66
  67     public synchronized void request(int sensorId, BaseSensorHandler callback) {
  68         HttpClient localClient = commonHttpClient;
  69         if (localClient == null) {
  70             logger.warn("HTTP Client not initialized");
  71         } else {
  72             String url = sensorUrl + sensorId + "/";
  73             Request req = localClient.newRequest(url);
  74             req.timeout(15, TimeUnit.SECONDS).send(new BufferingResponseListener() {
  75                 @NonNullByDefault({})
  76                 @Override
  77                 public void onComplete(org.eclipse.jetty.client.api.Result result) {
  78                     if (result.getResponse().getStatus() != 200) {
  79                         String failure;
  80                         if (result.getResponse().getReason() != null) {
  81                             failure = result.getResponse().getReason();
  82                         } else {
  83                             failure = result.getFailure().getMessage();
  84                         }
  85                         callback.onError(failure);
  86                     } else {
  87                         callback.onResponse(getContentAsString());
  88                     }
  89                 }
  90             });
  91         }
  92     }
  93
  94     public @Nullable List<SensorDataValue> getLatestValues(String response) {
  95         SensorData[] valueArray = GSON.fromJson(response, SensorData[].class);
  96         if (valueArray.length == 0) {
  97             return null;
  98         } else if (valueArray.length == 1) {
  99             SensorData v = valueArray[0];
 100             return v.getSensorDataValues();
 101         } else if (valueArray.length > 1) {
 102             // declare first item as latest
 103             SensorData latestData = valueArray[0];
 104             String latestTimeStr = latestData.getTimeStamp();
 105             LocalDateTime latestTime = DateTimeUtils.toDate(latestTimeStr);
 106             if (latestTime == null) {
 107                 logDateConversionError(response, latestData);
 108             }
 109             for (int i = 1; i < valueArray.length; i++) {
 110                 SensorData iterData = valueArray[i];
 111                 String iterTimeStr = iterData.getTimeStamp();
 112                 LocalDateTime iterTime = DateTimeUtils.toDate(iterTimeStr);
 113                 if (iterTime == null) {
 114                     logDateConversionError(response, latestData);
 115                 }
 116                 if (iterTime != null && latestTime != null) {
 117                     if (latestTime.isBefore(iterTime)) {
 118                         // found item is newer - take it as latest
 119                         latestTime = iterTime;
 120                         latestData = iterData;
 121                     } // else - found item is older - nothing to do
 122
 123                 } else {
 124                     logger.warn("One or two dates cannot be decoded 1) {} 2) {}", iterTimeStr, latestTimeStr);
 125                 }
 126             }
 127             return latestData.getSensorDataValues();
 128         } else {
 129             return null;
 130         }
 131     }
 132
 133     public void logDateConversionError(final String response, final Object dto) {
 134         logger.warn("Unable to get timestamp");
 135         logger.warn("Response: {}", response);
 136         String json = GSON.toJson(dto);
 137         logger.warn("GSon: {}", json);
 138     }
 139
 140     public boolean isParticulate(@Nullable List<SensorDataValue> valueList) {
 141         if (valueList == null) {
 142             return false;
 143         }
 144         return valueList.stream().map(v -> v.getValueType()).filter(t -> t.equals(P1) || t.equals(P2)).findAny()
 145                 .isPresent();
 146     }
 147
 148     public boolean isCondition(@Nullable List<SensorDataValue> valueList) {
 149         if (valueList == null) {
 150             return false;
 151         }
 152         return valueList.stream().map(v -> v.getValueType()).filter(
 153                 t -> t.equals(TEMPERATURE) || t.equals(HUMIDITY) || t.equals(PRESSURE) || t.equals(PRESSURE_SEALEVEL))
 154                 .findAny().isPresent();
 155     }
 156
 157     public boolean isNoise(@Nullable List<SensorDataValue> valueList) {
 158         if (valueList == null) {
 159             return false;
 160         }
 161         return valueList.stream().map(v -> v.getValueType())
 162                 .filter(t -> t.equals(NOISE_EQ) || t.equals(NOISE_MAX) || t.equals(NOISE_MIN)).findAny().isPresent();
 163     }
 164 }