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loaderbar.php
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loaderbar.php
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<?php
/**
* The loader bar class deals with the status bar it expects one parameter $total
*
* @package turnitintool
* @subpackage classes
* @copyright 2010 iParadigms LLC
*/
class turnitintool_loaderbarclass {
/**
* @var int $proc The current procedure in progress
*/
var $proc;
/**
* @var int $total The total number of procedures
*/
var $total;
/**
* @var int $starttime The object start time represented by a unix timestamp
*/
var $starttime;
/**
* A backward compatible constructor / destructor method that works in PHP4 to emulate the PHP5 magic method __construct
*/
function turnitintool_loaderbarclass(){
if (version_compare(PHP_VERSION,"5.0.0","<")) {
$argcv = func_get_args();
call_user_func_array(array(&$this, '__construct'), $argcv);
}
}
/**
* The constructor for the class, Calls the startloader() method
*
* @param int $iTotal The total number of Procedures to follow as sent in the total paramet for the class
*/
function __construct($iTotal) {
$this->proc=0;
$this->total=$iTotal;
$this->starttime=time();
$this->startloader();
register_shutdown_function(array(&$this,"endloader"));
}
/**
* The startloader method draws the header and div tags for the loaderbar
*/
function startloader() {
global $CFG;
for ($i = 0; $i < ob_get_level(); $i++) {
ob_end_flush();
}
// start output buffering
if (ob_get_length() === false) {
ob_start();
}
echo '<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body></body>
<script type="text/javascript" src="'.$CFG->wwwroot.'/mod/turnitintool/loaderbar.js"></script>
<script type="text/javascript" language="javascript">
function updateLoader(proc,total,percentdone,timeleft,status) {
headText.innerHTML=\''.get_string('turnitinloading','turnitintool').'\';
if (proc==total) {
graphicURL="'.$CFG->wwwroot.'/mod/turnitintool/pix/progressgrad_animated.gif";
} else {
graphicURL="'.$CFG->wwwroot.'/mod/turnitintool/pix/progressgrad.gif";
}
backpos=(proc/total*250)-250;
barBlock.style.backgroundImage=\'url(\'+graphicURL+\')\';
barBlock.style.backgroundPosition=backpos+\'px 0px\';
barBlock.style.border="1px solid #999999";
if (status=="") {
statusTEXT="'.get_string('synchronisingturnitin','turnitintool').'<br />"+percentdone+" - ("+timeleft+")";
} else {
statusTEXT=status+"<br />"+percentdone+" - ("+timeleft+")";
}
statusText.innerHTML=statusTEXT;
}
function closeLoader() {
document.body.removeChild(loaderDiv);
loaderBar.removeChild(statusText);
loaderBar.removeChild(barBlock);
loaderBar.removeChild(headText);
loaderDiv.removeChild(loaderBar);
}
</script>
';
ob_flush();
flush();
}
/**
* The endloader method draws the footer and sets CSS display:none; to the loader bar div
*/
function endloader() {
echo '
<script language="javascript" type="text/javascript">
closeLoader();
</script>';
}
/**
* Returns the percentage that has been processed given the current procedure and the total
*
* @return Returns the percentage as a string (eg. 15%)
*/
function getpercentdone() {
$percentNum=ceil(($this->proc/$this->total)*100);
return $percentNum.'%';
}
/**
* Returns the estimated time remaing for the outstanding procedures
* based on the time it has taken to do the previous procedures
*
* @return Returns the time remaining string
*/
function gettimeleft() {
$timenow=time();
$timeremaining=(($timenow-$this->starttime)/$this->proc)*($this->total-$this->proc+1);
if ($this->proc>ceil($this->total-($this->total*0.99))) {
return get_string('remaining','turnitintool',$this->secs2words(ceil($timeremaining)));
} else {
return get_string('estimatingtime','turnitintool');
}
}
/**
* Converts a number of seconds into a human readable string
*
* @param int $seconds The seconds to convert to a human readable format
* @return Returns human readable time based on the seconds parameter
*/
function secs2words($seconds) {
$return="";
$days=(int)($seconds/86400);
$hours=(int)(($seconds-($days*86400))/3600);
if($hours>0) {
$return.=$hours." ".get_string('hrs','turnitintool');
}
$minutes = (int)(($seconds-$days*86400-$hours*3600)/60);
if($hours>0 OR $minutes>0) {
$return.=" ".$minutes." ".get_string('mins','turnitintool');
} else {
$secs=(int)($seconds-($days*86400)-($hours*3600)-($minutes*60));
if (intval($secs)==0) {
$secs='-';
}
$return.=" ".$secs." ".get_string('secs','turnitintool');
}
return $return;
}
/**
* Sends a redraw command to output a javascript command to update the div
* with the progress, staus and estimated time remaining
*
* @param string $status The status message to display to the user that describes this procedure
*/
function redrawbar($status="") {
$this->proc++;
echo '
<script language="javascript" type="text/javascript">
updateLoader('.$this->proc.','.$this->total.',"'.$this->getpercentdone().'","'.$this->gettimeleft().'","'.$status.'");
</script>';
if (ob_get_length()) {
ob_flush();
flush();
}
}
}
/* ?> */