librenms-librenms/includes/html/forms/sensor-update.inc.php

<?php

/*
 * LibreNMS
 *
 * Copyright (c) 2014 Neil Lathwood <https://github.com/laf/ http://www.lathwood.co.uk>
 * Copyright (c) 2018 TheGreatDoc <https://github.com/TheGreatDoc>
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.  Please see LICENSE.txt at the top level of
 * the source code distribution for details.
 */

header('Content-type: application/json');

if (!Auth::user()->hasGlobalAdmin()) {
    $response = array(
        'status'  => 'error',
        'message' => 'Need to be admin',
    );
    echo _json_encode($response);
    exit;
}

$status  = 'error';
$message = 'Error updating sensor limit';
$device_id = $_POST['device_id'];
$sensor_id = $_POST['sensor_id'];
$value_type = $_POST['value_type'];
$data = $_POST['data'];

if (!is_numeric($device_id)) {
    $message = 'Missing device id';
} elseif (!is_numeric($sensor_id)) {
    $message = 'Missing sensor id';
} elseif (!isset($data)) {
    $message = 'Missing data';
} else {
    if (dbUpdate(array($value_type => set_null($data, array('NULL')), 'sensor_custom' => 'Yes'), 'sensors', '`sensor_id` = ? AND `device_id` = ?', array($sensor_id, $device_id)) >= 0) {
        $message = 'Sensor value updated';
        $status = 'ok';
    } else {
        $message = 'Could not update sensor value';
    }
}

$response = array(
    'status'        => $status,
    'message'       => $message,
);
echo _json_encode($response);