#!/usr/bin/env php
<?php

/* Observium Network Management and Monitoring System
 * Copyright (C) 2006-2011, Observium Developers - http://www.observium.org
 *
 * 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.
 *
 * See COPYING for more details.
 */

include("includes/defaults.inc.php");
include("config.php");
include("includes/functions.php");
include("includes/polling/functions.inc.php");

$poller_start = utime();
echo("Observium Poller v".$config['version']."\n\n");

$options = getopt("h:m:i:n:d::a::");

if ($options['h'] == "odd")      { $options['n'] = "1"; $options['i'] = "2"; }
elseif ($options['h'] == "even") { $options['n'] = "0"; $options['i'] = "2"; }
elseif ($options['h'] == "all")  { $where = " "; $doing = "all"; }
elseif ($options['h'])
{
  if (is_numeric($options['h']))
  {
    $where = "AND `device_id` = '".$options['h']."'";
    $doing = $options['h'];
  }
  else
  {
    $where = "AND `hostname` LIKE '".str_replace('*','%',mres($options['h']))."'";
    $doing = $options['h'];
  }
}

if (isset($options['i']) && $options['i'] && isset($options['n']))
{
  $where = true; // FIXME
  $query = 'SELECT `device_id` FROM (SELECT @rownum :=0) r,
              (
                SELECT @rownum := @rownum +1 AS rownum, `device_id`
                FROM `devices`
                WHERE `disabled` = 0 
                ORDER BY `device_id` ASC
              ) temp
            WHERE MOD(temp.rownum, '.mres($options['i']).') = '.mres($options['n']).';';
  $doing = $options['n'] ."/".$options['i'];
}

if (!$where)
{
  echo("-h <device id> | <device hostname wildcard>  Poll single device\n");
  echo("-h odd                                       Poll odd numbered devices  (same as -i 2 -n 0)\n");
  echo("-h even                                      Poll even numbered devices (same as -i 2 -n 1)\n");
  echo("-h all                                       Poll all devices\n\n");
  echo("-i <instances> -n <number>                   Poll as instance <number> of <instances>\n");
  echo("                                             Instances start at 0. 0-3 for -n 4\n\n");
  echo("Debugging and testing options:\n");
  echo("-d                                           Enable debugging output\n");
  echo("-m                                           Specify single module to be run\n");
  echo("\n");
  echo("No polling type specified!\n");
  exit;
}

if (isset($options['d']))
{
  echo("DEBUG!\n");
  $debug = TRUE;
  ini_set('display_errors', 1);
  ini_set('display_startup_errors', 1);
  ini_set('log_errors', 1);
  ini_set('error_reporting', 1);
} else {
  $debug = FALSE;
#  ini_set('display_errors', 0);
  ini_set('display_startup_errors', 0);
  ini_set('log_errors', 0);
#  ini_set('error_reporting', 0);
}

echo("Starting polling run:\n\n");
$polled_devices = 0;
if(!isset($query))
{
  $query = "SELECT `device_id` FROM `devices` WHERE `disabled` = 0 $where ORDER BY `device_id` ASC";
}

foreach (dbFetch($query) as $device)
{
  $device = dbFetchRow("SELECT * FROM `devices` WHERE `device_id` = '".$device['device_id']."'");

  poll_device($device, $options);

}


function poll_device($device, $options) {

  global $config;
  global $device;
  global $polled_devices;
  global $db_stats;

  $attribs = get_dev_attribs($device['device_id']);

  $status = 0; unset($array);
  $device_start = utime();  // Start counting device poll time

  echo($device['hostname'] . " ".$device['device_id']." ".$device['os']." ");
  if ($config['os'][$device['os']]['group'])
  {
    $device['os_group'] = $config['os'][$device['os']]['group'];
    echo("(".$device['os_group'].")");
  }
  echo("\n");

  unset($poll_update); unset($poll_update_query); unset($poll_separator); 
  $poll_update_array = array();

  $host_rrd = $config['rrd_dir'] . "/" . $device['hostname'];
  if (!is_dir($host_rrd)) { mkdir($host_rrd); echo("Created directory : $host_rrd\n"); }

  $device['pingable'] = isPingable($device['hostname']);
  if ($device['pingable'])
  {
    $device['snmpable'] = isSNMPable($device);
    if ($device['snmpable'])
    {
      $status = "1";
    } else {
      echo("SNMP Unreachable");
      $status = "0";
    }
  } else {
    echo("Unpingable");
    $status = "0";
  }

  if ($device['status'] != $status)
  {
    $poll_update .= $poll_separator . "`status` = '$status'";
    $poll_separator = ", ";

    dbUpdate(array('status' => $status), 'devices', 'device_id=?', array($device['device_id']));
    dbInsert(array('importance' => '0', 'device_id' => $device['device_id'], 'message' => "Device is " .($status == '1' ? 'up' : 'down')), 'alerts');

    log_event('Device status changed to ' . ($status == '1' ? 'Up' : 'Down'), $device, ($status == '1' ? 'up' : 'down'));
    notify($device, "Device ".($status == '1' ? 'Up' : 'Down').": " . $device['hostname'], "Device ".($status == '1' ? 'up' : 'down').": " . $device['hostname'] . " at " . date($config['timestamp_format']));
  }

  if ($status == "1")
  {
    $graphs = array();
    $oldgraphs = array();

    if ($options['m'])
    {
      if (is_file("includes/polling/".$options['m'].".inc.php"))
      {
        include("includes/polling/".$options['m'].".inc.php");
      }
    } else {
      foreach($config['poller_modules'] as $module => $module_status)
      {
        if ($attribs['poll_'.$module] || ( $module_status && !isset($attribs['poll_'.$module])))
        {
          include('includes/polling/'.$module.'.inc.php');
        } elseif (isset($attribs['poll_'.$module]) && $attribs['poll_'.$module] == "0") {
          echo("Module [ $module ] disabled on host.\n");
        } else {
          echo("Module [ $module ] disabled globally.\n");
        }
      }
    }

if (!$options['m'])
{

  ## FIXME EVENTLOGGING -- MAKE IT SO WE DO THIS PER-MODULE?
  ### This code cycles through the graphs already known in the database and the ones we've defined as being polled here
  ### If there any don't match, they're added/deleted from the database.
  ### Ideally we should hold graphs for xx days/weeks/polls so that we don't needlessly hide information.

  foreach (dbFetch("SELECT `graph` FROM `device_graphs` WHERE `device_id` = ?", array($device['device_id'])) as $graph)
  {
    if (!isset($graphs[$graph["graph"]]))
    {
      dbDelete('device_graphs', "`device_id` = ? AND `graph` = ?", array($device['device_id'], $graph["graph"]));
    } else {
      $oldgraphs[$graph["graph"]] = TRUE;
    }
  }

  foreach ($graphs as $graph => $value)
  {
    if (!isset($oldgraphs[$graph]))
    {
      dbInsert(array('device_id' => $device['device_id'], 'graph' => $graph), 'device_graphs');
    }
  }
}

    $device_end = utime(); $device_run = $device_end - $device_start; $device_time = substr($device_run, 0, 5);

    $update_array['last_polled'] = array('NOW()'); 
    $update_array['last_polled_timetaken'] = $device_time;

    #echo("$device_end - $device_start; $device_time $device_run");
    echo("Polled in $device_time seconds\n");

    

    if ($debug) { echo("Updating " . $device['hostname'] . " - ".print_r($update_array)." \n"); }

    $updated = dbUpdate($update_array, 'devices', '`device_id` = ?', array($device['device_id']));
    if($updated) { echo("UPDATED!\n"); }

    unset($storage_cache); // Clear cache of hrStorage ** MAYBE FIXME? **
    unset($cache); // Clear cache (unify all things here?)
  }

  $polled_devices++;

}

  $poller_end = utime(); $poller_run = $poller_end - $poller_start; $poller_time = substr($poller_run, 0, 5);

  if ($polled_devices)  
  {
    dbInsert(array('type' => 'poll', 'doing' => $doing, 'start' => $poller_start, 'duration' => $poller_time, 'devices' => $polled_devices ), 'perf_times');
  }

  $string = $argv[0] . " $doing " .  date("F j, Y, G:i") . " - $polled_devices devices polled in $poller_time secs";
  if ($debug) echo("$string\n");

  echo('MySQL: Cell['.($db_stats['fetchcell']+0).'/'.round($db_stats['fetchcell_sec']+0,2).'s]'.
              ' Row['   .($db_stats['fetchrow']+0). '/'.round($db_stats['fetchrow_sec']+0,2).'s]'.
             ' Rows['   .($db_stats['fetchrows']+0).'/'.round($db_stats['fetchrows_sec']+0,2).'s]'.
           ' Column['.($db_stats['fetchcol']+0). '/'.round($db_stats['fetchcol_sec']+0,2).'s]'.
           ' Update['   .($db_stats['update']+0).'/'.round($db_stats['update_sec']+0,2).'s]'.
           ' Insert['.($db_stats['insert']+0). '/'.round($db_stats['insert_sec']+0,2).'s]'.
           ' Delete['.($db_stats['delete']+0). '/'.round($db_stats['delete_sec']+0,2).'s]');

  echo("\n");

  logfile($string);

  unset($config); ### Remove this for testing

  #print_r(get_defined_vars());


?>