source: trunk/www/Module/History/Model.php

<?php

include_once(dirname(__FILE__).'/../../Base/Model.php');

class History extends Model
{
  var $ServerId;
  var $MeasureId;
  var $Database;
  var $PeriodList;
  var $Resolution = 1000;
  
  function __construct($System, $ServerId, $MeasureId)
  {
    parent::__construct($System);
    $this->ServerId = $ServerId;
    $this->MeasureId = $MeasureId;
    $this->PeriodList = array(
      array('Name' => 'Hodina', 'Period' => 60 * 60),
      array('Name' => 'Den', 'Period' => 60 * 60 * 24),
      array('Name' => 'Týden', 'Period' => 60 * 60 * 24 * 7),
      array('Name' => 'Měsíc', 'Period' => 60 * 60 * 24 * 30),
      array('Name' => 'Rok', 'Period' => 60 * 60 * 24 * 365),
      array('Name' => 'Desetiletí', 'Period' => 60 * 60 * 24 * 3650),
    );
  } 
  
  function AddValue($Value)
  {
    $Time = time();
    foreach($this->PeriodList as $Index => $Period)
    {
      $Resolution = $this->Resolution;
      if($Resolution > ($Period['Period'] / 60)) $Resolution = $Period['Period'] / 60;      
      $PeriodTime = floor(floor($Time * $Resolution / $Period['Period']) * $Period['Period'] / $Resolution);
      $PeriodTimeStart = floor((floor($Time / $Period['Period'] * $Resolution) - 1) * $Period['Period'] / $Resolution);
      //echo($PeriodTimeStart.' - '.$PeriodTime.' = '.($PeriodTime - $PeriodTimeStart).', ');
      if($Index == 0) 
      {
        $ValueMinimum = $Value;
        $ValueAverage = $Value;
        $ValueMaximum = $Value;
      } else
      {
        $DbResult = $this->Database->query('SELECT MIN(`Minimum`), AVG(`Average`), MAX(`Maximum`) FROM `History` WHERE `Server`='.$this->ServerId.' AND `Measure`='.$this->MeasureId.' AND `Period`='.($Index - 1).' AND `Time` > '.$PeriodTimeStart.' AND `Time` <= '.$PeriodTime);
        $Value = $DbResult->fetch_row();
        $ValueMinimum = $Value[0];
        $ValueAverage = $Value[1];
        $ValueMaximum = $Value[2];
      }
      $this->Database->replace('History', array('Time' => $PeriodTime, 'Period' => $Index, 'Server' => $this->ServerId, 'Measure' => $this->MeasureId, 'Minimum' => $ValueMinimum, 'Average' => $ValueAverage, 'Maximum' => $ValueMaximum));
    }
    // echo("\n");
  }
  
  function GetImage($Width, $Height)
  {
    
  }
}