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<?php
namespace SimpleSAML\Module\statistics;
/**
* @author Andreas Åkre Solberg <andreas.solberg@uninett.no>
* @package SimpleSAMLphp
*/
class DateHandler
{
/** @var int */
protected $offset;
/**
* Constructor
*
* @param int $offset Date offset
*/
public function __construct($offset)
{
$this->offset = $offset;
}
/**
* @param int $timestamp
* @return int
*/
protected function getDST($timestamp)
{
if (idate('I', $timestamp)) {
return 3600;
}
return 0;
}
/**
* @param int $epoch
* @param int $slotsize
* @return float
*/
public function toSlot($epoch, $slotsize)
{
$dst = $this->getDST($epoch);
return floor(($epoch + $this->offset + $dst) / $slotsize);
}
/**
* @param int $slot
* @param int $slotsize
* @return int
*/
public function fromSlot($slot, $slotsize)
{
$temp = $slot * $slotsize - $this->offset;
$dst = $this->getDST($temp);
return $slot * $slotsize - $this->offset - $dst;
}
/**
* @param int $epoch
* @param string $dateformat
* @return string
*/
public function prettyDateEpoch($epoch, $dateformat)
{
return date($dateformat, $epoch);
}
/**
* @param int $slot
* @param int $slotsize
* @param string $dateformat
* @return string
*/
public function prettyDateSlot($slot, $slotsize, $dateformat)
{
return $this->prettyDateEpoch($this->fromSlot($slot, $slotsize), $dateformat);
}
/**
* @param int $from
* @param int $to
* @param int $slotsize
* @param string $dateformat
* @return string
*/
public function prettyHeader($from, $to, $slotsize, $dateformat)
{
$text = $this->prettyDateSlot($from, $slotsize, $dateformat);
$text .= ' to ';
$text .= $this->prettyDateSlot($to, $slotsize, $dateformat);
return $text;
}
}
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