<?php

/**
 * Observium
 *
 *   This file is part of Observium.
 *
 * @package    observium
 * @subpackage discovery
 * @copyright  (C) 2006-2013 Adam Armstrong, (C) 2013-2019 Observium Limited
 *
 */

$diskio_array = snmpwalk_cache_oid($device, 'diskIOEntry', array(), 'UCD-DISKIO-MIB');

// Build array of entries from the database
foreach (dbFetchRows('SELECT * FROM `ucd_diskio` WHERE `device_id` = ?', array($device['device_id'])) as $entry)
{
  $entries_db[$entry['diskio_index']] = $entry;
}

// Check if the $diskio_array
if (count($diskio_array) > 0)
{
  foreach ($diskio_array as $index => $entry)
  {
    if ($entry['diskIONRead'] > 0 || $entry['diskIONWritten'] > 0)
    {
      print_debug('$index '.$entry['diskIODevice']);
      if (isset($entries_db[$index]) && $entries_db[$index]['diskio_descr'] == $entry['diskIODevice'] )
      {
        // Entries match. Nothing to do here!
        echo('.');
      } elseif (isset($entries_db[$index])) {
        // Index exists, but block device has changed!
        echo('U');
        dbUpdate(array('diskio_descr' => $entry['diskIODevice']), 'ucd_diskio', '`diskio_id` = ?', array($entries_db[$index]['diskio_id']));
      } else {
        // Index doesn't exist in the database. Add it.
        $inserted = dbInsert(array('device_id' => $device['device_id'], 'diskio_index' => $index, 'diskio_descr' => $entry['diskIODevice']), 'ucd_diskio');
        echo('+');
      }
      // Remove from the DB array
      unset($entries_db[$index]);
    } // end validity check
  } // end array foreach
} // End array if

// Remove diskio entries which weren't redetected here

foreach ($entries_db as $entry)
{
  echo('-');
  dbDelete('ucd_diskio', '`diskio_id` = ?', array($entry['diskio_id']));
}

echo(PHP_EOL);

// EOF