136 lines
4.1 KiB
PHP
136 lines
4.1 KiB
PHP
<?php
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/**
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2013 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
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*
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*
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*/
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namespace oat\tao\helpers;
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/**
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* Helps manipulate intervals of dates with microseconds, extended from built in DateInterval
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*
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* Class DateIntervalMS
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* @author Ivan Klimchuk <klimchuk@1pt.com>
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* @package oat\tao\helpers
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*/
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class DateIntervalMS extends \DateInterval
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{
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public $u = 0;
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protected static $interval_spec_regex = "/
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^ ## start of the string
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P ## first character must be a P
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(?:(?P<y>\d+)Y)? ## year
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(?:(?P<m>\d+)M)? ## month
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(?:(?P<d>\d+)D)? ## day
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(?:T ## T delineates between day and time information
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(?:(?P<h>\d+)H)? ## hour
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(?:(?P<i>\d+)M)? ## minute
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(?:(?P<s>\d+(?:\.\d+)?)S)? ## seconds as float.
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)? ## closes 'T' subexpression
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$ ## end of the string
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/x";
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/**
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* Formatting for current date interval
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* @param $format
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* @return string
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*/
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public function format($format)
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{
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$format = str_replace('%U', sprintf("%06d", $this->u), $format);
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$format = str_replace('%u', sprintf("%d", intval($this->u)), $format);
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return parent::format($format);
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}
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/**
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* Convert microseconds to seconds in float type
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* @param $microseconds
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* @return float
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*/
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public static function microsecondsToSeconds($microseconds)
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{
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$microseconds = intval($microseconds);
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$seconds = round($microseconds / 1000000, 6);
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return $seconds;
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}
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/**
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* Convert seconds with microseconds as fraction to amount of microseconds
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* @param $seconds
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* @return int
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*/
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public static function secondsToMicroseconds($seconds)
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{
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$seconds = round($seconds, 6);
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$microseconds = intval($seconds * 1000000);
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return $microseconds;
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}
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/**
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* Build valid DateInterval format
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* @param array $parts
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* @return string
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*/
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private static function getLegacySpec(array $parts)
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{
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$spec = "P";
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$spec .= $parts['y'] !== "" ? "{$parts['y']}Y" : "";
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$spec .= $parts['m'] !== "" ? "{$parts['m']}M" : "";
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$spec .= $parts['d'] !== "" ? "{$parts['d']}D" : "";
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if ($parts['h'] . $parts['i'] . $parts['s'] !== "") {
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$spec .= "T";
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$spec .= $parts['h'] !== "" ? "{$parts['h']}H" : "";
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$spec .= $parts['i'] !== "" ? "{$parts['i']}M" : "";
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$spec .= $parts['s'] !== "" ? "{$parts['s']}S" : "";
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}
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if ($spec === "P") {
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$spec = "";
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}
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return $spec;
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}
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/**
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* Custom construct with support microseconds
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* @param string $interval_spec
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*/
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public function __construct($interval_spec)
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{
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if (!preg_match(static::$interval_spec_regex, $interval_spec, $parts)) {
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throw new \UnexpectedValueException(sprintf("%s::%s: Unknown or bad format (%s)", get_called_class(), '__construct', $interval_spec));
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}
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if (isset($parts['s'])) {
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$preciseSeconds = floatval($parts['s']);
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$microseconds = static::secondsToMicroseconds(fmod($preciseSeconds, 1.0));
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$seconds = floor($preciseSeconds);
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$this->u = $microseconds;
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$parts['s'] = $seconds;
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}
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$legacy_spec = static::getLegacySpec($parts);
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parent::__construct($legacy_spec);
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}
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}
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