SG-iCalendar/helpers/SG_iCal_Duration.php

57 wiersze
1.4 KiB
PHP
Executable File

<?php // BUILD: Remove line
/**
* A class for calculating how many seconds a duration-string is
*
* @package SG_iCalReader
* @author Morten Fangel (C) 2008
* @license http://creativecommons.org/licenses/by-sa/2.5/dk/deed.en_GB CC-BY-SA-DK
*/
class SG_iCal_Duration {
protected $dur;
/**
* Constructs a new SG_iCal_Duration from a duration-rule.
* The basic build-up of DURATIONs are:
* (["+"] / "-") "P" (dur-date / dur-date + "T" + dur-time / dur-time / dur-week)
* Is solved via a really fugly reg-exp with way to many ()'s..
*
* @param $duration string
*/
public function __construct( $duration ) {
$ts = 0;
if (preg_match('/[\\+\\-]{0,1}P((\d+)W)?((\d+)D)?(T)?((\d+)H)?((\d+)M)?((\d+)S)?/', $duration, $matches) === 1) {
$results = array(
'weeks'=> (int)@ $matches[2],
'days'=> (int)@ $matches[4],
'hours'=> (int)@ $matches[7],
'minutes'=>(int)@ $matches[9],
'seconds'=>(int)@ $matches[11]
);
$ts += $results['seconds'];
$ts += 60 * $results['minutes'];
$ts += 60 * 60 * $results['hours'];
$ts += 24 * 60 * 60 * $results['days'];
$ts += 7 * 24 * 60 * 60 * $results['weeks'];
} else {
// Invalid duration!
}
$dir = ($duration{0} == '-') ? -1 : 1;
$this->dur = $dir * $ts;
}
/**
* Returns the duration in seconds
* @return int
*/
public function getDuration() {
return $this->dur;
}
}