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<?php
/**
* class that provides methods to convert human readable time / interval length
* expressions into other formats
*
* @author markus
* $Id: HumanReadableTime.php 92 2010-03-10 11:43:15Z markus $
*/
require_once(LIBRARY_PATH . '/date/exception.HumanReadableTimeException.php');
class HumanReadableTime {
/**
* normalize an HRT string, convert from HRT to seconds and then convert back to
* HRT
* @param string $hrt
* @param string $maxunit
* @return string
*/
public static function NormalizeHRT($hrt, $maxunit = 'w') {
return self::Seconds2HR(self::HR2Seconds($hrt), $maxunit);
}
/**
* convert string / interger which contains an interval length to
* human readable format (1w2d7h)
*
* if $maxunit is set, it defines the biggest unit in output (i.e. $maxunit = 'h' will
* allow only hms)
*
* @param string|integer $seconds
* @param string $maxunit
* @return string
*/
public static function Seconds2HR($seconds, $maxunit = 'w') {
$maxunit = trim(strtolower($maxunit));
$allowed = array('w' => 0, 'd' => 0, 'h' => 0, 'm' => 0, 's' => 0);
if (!in_array($maxunit, array_keys($allowed), true))
throw new HumanReadableTimeException('illegal value for maxunit: "' . $maxunit . '"');
foreach ($allowed as $key => $value) {
if ($maxunit == $key)
break;
unset($allowed[$key]);
}
$seconds = intval($seconds);
$hrt = '';
foreach ($allowed as $key => $value) {
switch ($key) {
case 'w':
$tmp = intval($seconds / (7*86400));
if ($tmp > 0)
$seconds %= (7*86400);
$allowed[$key] += $tmp;
break;
case 'd':
$tmp = intval($seconds / (86400));
if ($tmp > 0)
$seconds %= (86400);
$allowed[$key] += $tmp;
break;
case 'h':
$tmp = intval($seconds / (3600));
if ($tmp > 0)
$seconds %= (3600);
$allowed[$key] += $tmp;
break;
case 'm':
$tmp = intval($seconds / (60));
if ($tmp > 0)
$seconds %= (60);
$allowed[$key] += $tmp;
break;
case 's':
$allowed[$key] += $seconds;
break;
}
}
$hrt = '';
foreach ($allowed as $key => $value) {
if ($value > 0)
$hrt .= sprintf('%d%s', $value, $key);
}
return $hrt;
}
/**
* parse a string of 3h2m7s and return the number of seconds as integer
* add "s" to the end of the number if $addsecond is set to true
* @param string $hr
* @param boolean $addsecond
* @return integer|string
*/
public static function HR2Seconds($hr, $addsecond = false) {
$hr = trim($hr);
if ($hr == '') {
if ($addsecond === true)
return '0s';
else
return 0;
}
$hr = strtolower($hr);
$matches = array();
if (preg_match_all('/([0-9]*)([wdhms])/', $hr, $matches, PREG_SET_ORDER) > 0) {
$interval = 0;
for ($i = 0; $i < count($matches); $i++) {
switch ($matches[$i][2]) {
case 'w':
$interval += $matches[$i][1] * 7 * 86400;
break;
case 'd':
$interval += $matches[$i][1] * 86400;
break;
case 'h':
$interval += $matches[$i][1] * 3600;
break;
case 'm':
$interval += $matches[$i][1] * 60;
break;
case 's':
$interval += $matches[$i][1];
break;
}
}
if ($addsecond === true)
return sprintf('%ds', $interval);
else
return $interval;
}
if ($addsecond === true)
return '0s';
else
return 0;
}
}
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