* @license GPLV3 gpl.com * @link itsblue.de */ require_once './config.php'; header('Content-Type: application/json'); header('Access-Control-Allow-Origin: *'); $con = mysqli_connect($config['dbhost'], $config['dbuser'], $config['dbpassword'], $config['dbname']); if (!$con) { echo "

Fatal internal Error! :-/

"; echo "Error connecting to database: " . mysqli_connect_error(); http_response_code(500); exit(); } if (isset($_GET['locId'])) { // get data of given location $locId = $con->real_escape_string($_GET['locId']); $range['from'] = $con->real_escape_string($_GET['range']['from']); $range['to'] = $con->real_escape_string($_GET['range']['to']); $maxVals = $con->real_escape_string($_GET['maxVals']); $sql = "SELECT * FROM `locations` WHERE`id`=$locId"; $result = $con->query($sql); // only one row will be returned $data = $result->fetch_assoc(); if (!isset($range['from']) || $range['from'] === "") { $range['from'] = time() - 24 * 60 * 60; } if (!isset($range['to']) || $range['to'] === "") { $range['to'] = time(); } // get all measvalues of given location $sql = "SELECT M.measvalue,M.sensorid,M.timestamp FROM measvalues M JOIN sensors S ON M.sensorid = S.id JOIN locations L ON S.locationid=L.id WHERE L.id=$locId AND M.timestamp > " . $range['from'] . " AND M.timestamp < " . $range['to'] . " ORDER BY timestamp ASC"; $result = $con->query($sql); while ($row = $result->fetch_assoc()) { $measvalues[] = $row; } // get all sensors of given location $sql = "SELECT * FROM `sensors` WHERE `locationid` = $locId"; $result = $con->query($sql); //loop through the returned data while ($row = $result->fetch_assoc()) { unset($row['locationid']); // remove locId as it is redundant $sensors[] = $row; } // get all value types $sql = "SELECT * FROM `valuetypes`"; $result = $con->query($sql); //loop through the returned data while ($row = $result->fetch_assoc()) { foreach ($sensors as $sensor) { if ($sensor['valuetypeid'] == $row['id']) { $valuetypes[] = $row; break; } } } if (isset($maxVals) && $maxVals > 0 && count($measvalues) > $maxVals) { // build the new measvalues array with respect to maxVals for each sensor $finalMeasvals = array(); foreach ($sensors as $sensor) { $rawMeasvalsOfThisSensor = array(); $finalMeasvalsOfThisSensor = array(); foreach ($measvalues as $measvalue) { if ($measvalue["sensorid"] === $sensor["id"]) { array_push($rawMeasvalsOfThisSensor, $measvalue); } } $countOfValuesForAvarage = intval(round(count($rawMeasvalsOfThisSensor) / $maxVals, 0)); $takenValuesForNextSum = 0; $tmpMeasvalueSum = 0; $tmpTimestampSum = 0; for ($i = 0; $i < count($rawMeasvalsOfThisSensor); $i++) { $measvalue = $rawMeasvalsOfThisSensor[$i]; if ($measvalue["sensorid"] === $sensor["id"]) { $tmpMeasvalueSum += $measvalue["measvalue"]; $tmpTimestampSum += $measvalue["timestamp"]; $takenValuesForNextSum += 1; } if ($takenValuesForNextSum === $countOfValuesForAvarage || $i === count($rawMeasvalsOfThisSensor) - 1) { array_push($finalMeasvalsOfThisSensor, array("measvalue" => $tmpMeasvalueSum / $takenValuesForNextSum, "timestamp" => $tmpTimestampSum / $takenValuesForNextSum, "sensorid" => $sensor["id"])); $takenValuesForNextSum = 0; $tmpMeasvalueSum = 0; $tmpTimestampSum = 0; } } //print_r($finalMeasvalsOfThisSensor); $finalMeasvals = array_merge($finalMeasvals, $finalMeasvalsOfThisSensor); } $measvalues = $finalMeasvals; } // find actual range $min; $max; foreach ($measvalues as $value) { if ($value['timestamp'] < $min || !isset($min)) { $min = $value['timestamp']; } else if ($value['timestamp'] > $max || !isset($max)) { $max = $value['timestamp']; } } // add sensors and value types to data object $data['measvalues'] = $measvalues; $data['sensors'] = $sensors; $data['valuetypes'] = $valuetypes; $data['range'] = array('from' => $min, 'to' => $max); } else { // get all locations $sql = "SELECT * FROM `locations`"; $result = $con->query($sql); //loop through the returned data while ($row = $result->fetch_assoc()) { $data[] = $row; } } http_response_code(200); echo json_encode($data);