ProgressTracker.class.php

<?php
/*
 * Be sure to set the timezone in the calling script
 * 		date_default_timezone_set('America/Chicago'); 
 * 
 * 		require_once('ProgressTracker.class.php');
 * 
 * 
 */
class progressTracker{
	
	private $StartDateTime = '';
	private $TotalCount = 0;
	private $Errors = array();

	
	public function __construct($TotalCount = 0)
	{
		echo date(DATE_W3C)." starting . . .\n";
		$this->TotalCount = $TotalCount;
		$this->StartDateTime = new DateTime();
		$this->update();
	}
	
	public function setTotalCount($TotalCount = 0)
	{
		$this->TotalCount = $TotalCount;
		echo "Total to be processed:".$TotalCount."\n";
	}
	
	public function logError($Error)
	{
		array_push($this->Errors, $Error);
	}
	
	public function update($Message = '', $Processed = 0)
	{
		//echo "\n\n";
		$Now = new DateTime();
		$Duration = date_diff($this->StartDateTime, $Now, true);
		$RecordsPerMinute = 0;
		$EstimatedTimeLeft = 0;
		$ETLHours = 0;
		$ETLDays = 0;
		$EstimatedFinishTime = new DateTime();
		echo $Duration->format("\tYears:%Y,Months:%M,Days:%d,Hours:%H,Minutes:%i,Seconds:%s \n");
		if ($this->TotalCount)
		{
		    $PercentDone = round($Processed*100/$this->TotalCount);
		    $RecordsLeft = $this->TotalCount - $Processed;
		    echo "\t".$PercentDone."% completed, ".$RecordsLeft." records remaining, ".$Processed." records processed\n";
			$TotalMinutes = $Duration->i + $Duration->h * 60 + $Duration->d * 1440 + $Duration->s / 60;
			$TotalMinutes = round($TotalMinutes);
			if ($TotalMinutes > 0) 
			{
				$RecordsPerMinute = round($Processed/$TotalMinutes);
				$EstimatedFinishTime->add(new DateInterval('PT'.$TotalMinutes.'M'));
			}
			if ($RecordsPerMinute > 0) $EstimatedTimeLeft = round($RecordsLeft/$RecordsPerMinute);
			if ($EstimatedTimeLeft > 0) $ETLHours = round($EstimatedTimeLeft/60, 2);
			if ($ETLHours > 0) $ETLDays = round($ETLDays/24, 2);
			echo "\t".$RecordsPerMinute." records per minute, ".$EstimatedTimeLeft." minutes or ".$ETLHours." hours or ".$ETLDays." days left\n";
			echo "\tEstimated Completion Time: ".$EstimatedFinishTime->format('Y-m-d H:i:s')."\n";
		}
		if ($Message)
		{
			echo $Message."\n";
		}
		echo "\n";
	}
	
	public function __destruct()
	{
		echo date(DATE_W3C)." finished . . .\nTotal Duration:\n";
		$Now = new DateTime();
		$Duration = date_diff($this->StartDateTime, $Now, true);
		echo $Duration->format("Years:%Y,Months:%M,Days:%d,Hours:%H,Minutes:%i,Seconds:%s \n");
		echo count($this->Errors)." errors\n";
		print_r($this->Errors);
			}
}