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<?php
/* Icinga Web 2 | (c) 2013 Icinga Development Team | GPLv2+ */
namespace Icinga\Util;
use DateTime;
class Format
{
const STANDARD_IEC = 0;
const STANDARD_SI = 1;
protected static $instance;
protected static $bitPrefix = array(
array('bit', 'Kibit', 'Mibit', 'Gibit', 'Tibit', 'Pibit', 'Eibit', 'Zibit', 'Yibit'),
array('bit', 'kbit', 'Mbit', 'Gbit', 'Tbit', 'Pbit', 'Ebit', 'Zbit', 'Ybit'),
);
protected static $bitBase = array(1024, 1000);
protected static $bytePrefix = array(
array('B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB'),
array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'),
);
protected static $byteBase = array(1024, 1000);
protected static $secondPrefix = array('s', 'ms', 'µs', 'ns', 'ps', 'fs', 'as');
protected static $secondBase = 1000;
public static function getInstance()
{
if (self::$instance === null) {
self::$instance = new Format;
}
return self::$instance;
}
public static function bits($value, $standard = self::STANDARD_SI)
{
return self::formatForUnits(
$value,
self::$bitPrefix[$standard],
self::$bitBase[$standard]
);
}
public static function bytes($value, $standard = self::STANDARD_IEC)
{
return self::formatForUnits(
$value,
self::$bytePrefix[$standard],
self::$byteBase[$standard]
);
}
public static function seconds($value)
{
if ($value === null) {
return '';
}
$absValue = abs($value);
if ($absValue < 60) {
return self::formatForUnits($value, self::$secondPrefix, self::$secondBase);
} elseif ($absValue < 3600) {
return sprintf('%0.2f m', $value / 60);
} elseif ($absValue < 86400) {
return sprintf('%0.2f h', $value / 3600);
}
// TODO: Do we need weeks, months and years?
return sprintf('%0.2f d', $value / 86400);
}
protected static function formatForUnits($value, &$units, $base)
{
if ($value === null) {
return '';
}
$sign = '';
if ($value < 0) {
$value = abs($value);
$sign = '-';
}
if ($value == 0) {
$pow = $result = 0;
} else {
$pow = floor(log($value, $base));
$result = $value / pow($base, $pow);
}
// 1034.23 looks better than 1.03, but 2.03 is fine:
if ($pow > 0 && $result < 2) {
$result = $value / pow($base, --$pow);
}
return sprintf(
'%s%0.2f %s',
$sign,
$result,
$units[abs($pow)]
);
}
/**
* Return the amount of seconds based on the given month
*
* @param DateTime|int $dateTimeOrTimestamp The date and time to use
*
* @return int
*/
public static function secondsByMonth($dateTimeOrTimestamp)
{
if ($dateTimeOrTimestamp === null) {
return 0;
}
if (!($dt = $dateTimeOrTimestamp) instanceof DateTime) {
$dt = new DateTime();
$dt->setTimestamp($dateTimeOrTimestamp);
}
return (int) $dt->format('t') * 24 * 3600;
}
/**
* Return the amount of seconds based on the given year
*
* @param DateTime|int $dateTimeOrTimestamp The date and time to use
*
* @return int
*/
public static function secondsByYear($dateTimeOrTimestamp)
{
if ($dateTimeOrTimestamp === null) {
return 0;
}
return (self::isLeapYear($dateTimeOrTimestamp) ? 366 : 365) * 24 * 3600;
}
/**
* Return whether the given year is a leap year
*
* @param DateTime|int $dateTimeOrTimestamp The date and time to use
*
* @return bool
*/
public static function isLeapYear($dateTimeOrTimestamp)
{
if ($dateTimeOrTimestamp === null) {
return false;
}
if (!($dt = $dateTimeOrTimestamp) instanceof DateTime) {
$dt = new DateTime();
$dt->setTimestamp($dateTimeOrTimestamp);
}
return $dt->format('L') == 1;
}
/**
* Unpack shorthand bytes PHP directives to bytes
*
* @param string $subject
*
* @return int
*/
public static function unpackShorthandBytes($subject)
{
$base = (int) $subject;
if ($base <= -1) {
return INF;
}
switch (strtoupper($subject[strlen($subject) - 1])) {
case 'K':
$multiplier = 1024;
break;
case 'M':
$multiplier = 1024 ** 2;
break;
case 'G':
$multiplier = 1024 ** 3;
break;
default:
$multiplier = 1;
break;
}
return $base * $multiplier;
}
}
|
