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