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DateTimeParser.php
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DateTimeParser.php
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<?php
namespace Sabre\VObject;
use DateTime;
use DateTimeZone;
use DateInterval;
use InvalidArgumentException;
use LogicException;
/**
* DateTimeParser
*
* This class is responsible for parsing the several different date and time
* formats iCalendar and vCards have.
*
* @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class DateTimeParser {
/**
* Parses an iCalendar (rfc5545) formatted datetime and returns a DateTime object
*
* Specifying a reference timezone is optional. It will only be used
* if the non-UTC format is used. The argument is used as a reference, the
* returned DateTime object will still be in the UTC timezone.
*
* @param string $dt
* @param DateTimeZone $tz
* @return DateTime
*/
static public function parseDateTime($dt, DateTimeZone $tz = null) {
// Format is YYYYMMDD + "T" + hhmmss
$result = preg_match('/^([0-9]{4})([0-1][0-9])([0-3][0-9])T([0-2][0-9])([0-5][0-9])([0-5][0-9])([Z]?)$/',$dt,$matches);
if (!$result) {
throw new LogicException('The supplied iCalendar datetime value is incorrect: ' . $dt);
}
if ($matches[7]==='Z' || is_null($tz)) {
$tz = new DateTimeZone('UTC');
}
$date = new DateTime($matches[1] . '-' . $matches[2] . '-' . $matches[3] . ' ' . $matches[4] . ':' . $matches[5] .':' . $matches[6], $tz);
// Still resetting the timezone, to normalize everything to UTC
// $date->setTimeZone(new \DateTimeZone('UTC'));
return $date;
}
/**
* Parses an iCalendar (rfc5545) formatted date and returns a DateTime object.
*
* @param string $date
* @param DateTimeZone $tz
* @return DateTime
*/
static public function parseDate($date, DateTimeZone $tz = null) {
// Format is YYYYMMDD
$result = preg_match('/^([0-9]{4})([0-1][0-9])([0-3][0-9])$/',$date,$matches);
if (!$result) {
throw new LogicException('The supplied iCalendar date value is incorrect: ' . $date);
}
if (is_null($tz)) {
$tz = new DateTimeZone('UTC');
}
$date = new DateTime($matches[1] . '-' . $matches[2] . '-' . $matches[3], $tz);
return $date;
}
/**
* Parses an iCalendar (RFC5545) formatted duration value.
*
* This method will either return a DateTimeInterval object, or a string
* suitable for strtotime or DateTime::modify.
*
* @param string $duration
* @param bool $asString
* @return DateInterval|string
*/
static public function parseDuration($duration, $asString = false) {
$result = preg_match('/^(?P<plusminus>\+|-)?P((?P<week>\d+)W)?((?P<day>\d+)D)?(T((?P<hour>\d+)H)?((?P<minute>\d+)M)?((?P<second>\d+)S)?)?$/', $duration, $matches);
if (!$result) {
throw new LogicException('The supplied iCalendar duration value is incorrect: ' . $duration);
}
if (!$asString) {
$invert = false;
if ($matches['plusminus']==='-') {
$invert = true;
}
$parts = array(
'week',
'day',
'hour',
'minute',
'second',
);
foreach($parts as $part) {
$matches[$part] = isset($matches[$part])&&$matches[$part]?(int)$matches[$part]:0;
}
// We need to re-construct the $duration string, because weeks and
// days are not supported by DateInterval in the same string.
$duration = 'P';
$days = $matches['day'];
if ($matches['week']) {
$days+=$matches['week']*7;
}
if ($days)
$duration.=$days . 'D';
if ($matches['minute'] || $matches['second'] || $matches['hour']) {
$duration.='T';
if ($matches['hour'])
$duration.=$matches['hour'].'H';
if ($matches['minute'])
$duration.=$matches['minute'].'M';
if ($matches['second'])
$duration.=$matches['second'].'S';
}
if ($duration==='P') {
$duration = 'PT0S';
}
$iv = new DateInterval($duration);
if ($invert) $iv->invert = true;
return $iv;
}
$parts = array(
'week',
'day',
'hour',
'minute',
'second',
);
$newDur = '';
foreach($parts as $part) {
if (isset($matches[$part]) && $matches[$part]) {
$newDur.=' '.$matches[$part] . ' ' . $part . 's';
}
}
$newDur = ($matches['plusminus']==='-'?'-':'+') . trim($newDur);
if ($newDur === '+') {
$newDur = '+0 seconds';
};
return $newDur;
}
/**
* Parses either a Date or DateTime, or Duration value.
*
* @param string $date
* @param DateTimeZone|string $referenceTz
* @return DateTime|DateInterval
*/
static public function parse($date, $referenceTz = null) {
if ($date[0]==='P' || ($date[0]==='-' && $date[1]==='P')) {
return self::parseDuration($date);
} elseif (strlen($date)===8) {
return self::parseDate($date, $referenceTz);
} else {
return self::parseDateTime($date, $referenceTz);
}
}
/**
* This method parses a vCard date and or time value.
*
* This can be used for the DATE, DATE-TIME, TIMESTAMP and
* DATE-AND-OR-TIME value.
*
* This method returns an array, not a DateTime value.
*
* The elements in the array are in the following order:
* year, month, date, hour, minute, second, timezone
*
* Almost any part of the string may be omitted. It's for example legal to
* just specify seconds, leave out the year, etc.
*
* Timezone is either returned as 'Z' or as '+08:00'
*
* For any non-specified values null is returned.
*
* List of date formats that are supported:
* YYYY
* YYYY-MM
* YYYYMMDD
* --MMDD
* ---DD
*
* YYYY-MM-DD
* --MM-DD
* ---DD
*
* List of supported time formats:
*
* HH
* HHMM
* HHMMSS
* -MMSS
* --SS
*
* HH
* HH:MM
* HH:MM:SS
* -MM:SS
* --SS
*
* A full basic-format date-time string looks like :
* 20130603T133901
*
* A full extended-format date-time string looks like :
* 2013-06-03T13:39:01
*
* Times may be postfixed by a timezone offset. This can be either 'Z' for
* UTC, or a string like -0500 or +1100.
*
* @param string $date
* @return array
*/
static public function parseVCardDateTime($date) {
$regex = '/^
(?: # date part
(?:
(?: (?P<year> [0-9]{4}) (?: -)?| --)
(?P<month> [0-9]{2})?
|---)
(?P<date> [0-9]{2})?
)?
(?:T # time part
(?P<hour> [0-9]{2} | -)
(?P<minute> [0-9]{2} | -)?
(?P<second> [0-9]{2})?
(?: \.[0-9]{3})? # milliseconds
(?P<timezone> # timezone offset
Z | (?: \+|-)(?: [0-9]{4})
)?
)?
$/x';
if (!preg_match($regex, $date, $matches)) {
// Attempting to parse the extended format.
$regex = '/^
(?: # date part
(?: (?P<year> [0-9]{4}) - | -- )
(?P<month> [0-9]{2}) -
(?P<date> [0-9]{2})
)?
(?:T # time part
(?: (?P<hour> [0-9]{2}) : | -)
(?: (?P<minute> [0-9]{2}) : | -)?
(?P<second> [0-9]{2})?
(?: \.[0-9]{3})? # milliseconds
(?P<timezone> # timezone offset
Z | (?: \+|-)(?: [0-9]{2}:[0-9]{2})
)?
)?
$/x';
if (!preg_match($regex, $date, $matches)) {
throw new InvalidArgumentException('Invalid vCard date-time string: ' . $date);
}
}
$parts = array(
'year',
'month',
'date',
'hour',
'minute',
'second',
'timezone'
);
$result = array();
foreach($parts as $part) {
if (empty($matches[$part])) {
$result[$part] = null;
} elseif ($matches[$part] === '-' || $matches[$part] === '--') {
$result[$part] = null;
} else {
$result[$part] = $matches[$part];
}
}
return $result;
}
/**
* This method parses a vCard TIME value.
*
* This method returns an array, not a DateTime value.
*
* The elements in the array are in the following order:
* hour, minute, second, timezone
*
* Almost any part of the string may be omitted. It's for example legal to
* just specify seconds, leave out the hour etc.
*
* Timezone is either returned as 'Z' or as '+08:00'
*
* For any non-specified values null is returned.
*
* List of supported time formats:
*
* HH
* HHMM
* HHMMSS
* -MMSS
* --SS
*
* HH
* HH:MM
* HH:MM:SS
* -MM:SS
* --SS
*
* A full basic-format time string looks like :
* 133901
*
* A full extended-format time string looks like :
* 13:39:01
*
* Times may be postfixed by a timezone offset. This can be either 'Z' for
* UTC, or a string like -0500 or +11:00.
*
* @param string $date
* @return array
*/
static public function parseVCardTime($date) {
$regex = '/^
(?P<hour> [0-9]{2} | -)
(?P<minute> [0-9]{2} | -)?
(?P<second> [0-9]{2})?
(?: \.[0-9]{3})? # milliseconds
(?P<timezone> # timezone offset
Z | (?: \+|-)(?: [0-9]{4})
)?
$/x';
if (!preg_match($regex, $date, $matches)) {
// Attempting to parse the extended format.
$regex = '/^
(?: (?P<hour> [0-9]{2}) : | -)
(?: (?P<minute> [0-9]{2}) : | -)?
(?P<second> [0-9]{2})?
(?: \.[0-9]{3})? # milliseconds
(?P<timezone> # timezone offset
Z | (?: \+|-)(?: [0-9]{2}:[0-9]{2})
)?
$/x';
if (!preg_match($regex, $date, $matches)) {
throw new InvalidArgumentException('Invalid vCard time string: ' . $date);
}
}
$parts = array(
'hour',
'minute',
'second',
'timezone'
);
$result = array();
foreach($parts as $part) {
if (empty($matches[$part])) {
$result[$part] = null;
} elseif ($matches[$part] === '-') {
$result[$part] = null;
} else {
$result[$part] = $matches[$part];
}
}
return $result;
}
}

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