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/*
* This file is part of the ICanBoogie package.
*
* (c) Olivier Laviale <olivier.laviale@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ICanBoogie;
/**
* Representation of a date and time.
*
* <pre>
* <?php
*
* // Let's say that _now_ is 2013-02-03 21:03:45 in Paris
*
* use ICanBoogie\DateTime;
*
* date_default_timezone_set('EST'); // set local time zone to Eastern Standard Time
*
* $time = new DateTime('now', 'Europe/Paris');
*
* echo $time; // 2013-02-03T21:03:45+0100
* echo $time->utc; // 2013-02-03T20:03:45Z
* echo $time->local; // 2013-02-03T15:03:45-0500
* echo $time->utc->local; // 2013-02-03T15:03:45-0500
* echo $time->utc->is_utc; // true
* echo $time->utc->is_local; // false
* echo $time->local->is_utc; // false
* echo $time->local->is_local; // true
* echo $time->is_dst; // false
*
* echo $time->as_rss; // Sun, 03 Feb 2013 21:03:45 +0100
* echo $time->as_db; // 2013-02-03 21:03:45
*
* echo $time->as_time; // 21:03:45
* echo $time->utc->as_time; // 20:03:45
* echo $time->local->as_time; // 15:03:45
* echo $time->utc->local->as_time; // 15:03:45
*
* echo $time->quarter; // 1
* echo $time->week; // 5
* echo $time->day; // 3
* echo $time->minute; // 3
* echo $time->is_monday; // false
* echo $time->is_saturday; // true
* echo $time->is_today; // true
* echo $time->tomorrow; // 2013-02-04T00:00:00+0100
* echo $time->tomorrow->is_future // true
* echo $time->yesterday; // 2013-02-02T00:00:00+0100
* echo $time->yesterday->is_past // true
* echo $time->monday; // 2013-01-28T00:00:00+0100
* echo $time->sunday; // 2013-02-03T00:00:00+0100
*
* echo $time->timestamp; // 1359921825
* echo $time; // 2013-02-03T21:03:45+0100
* $time->timestamp += 3600 * 4;
* echo $time; // 2013-02-04T01:03:45+0100
*
* echo $time->zone; // Europe/Paris
* echo $time->zone->offset; // 3600
* echo $time->zone->location; // FR,48.86667,2.33333
* echo $time->zone->location->latitude; // 48.86667
* $time->zone = 'Asia/Tokyo';
* echo $time; // 2013-02-04T09:03:45+0900
*
* $time->hour += 72;
* echo "Rendez-vous in 72 hours: $time"; // Rendez-vous in 72 hours: 2013-02-07T05:03:45+0900
* </pre>
*
* Empty dates are also supported:
*
* <pre>
* <?php
*
* use ICanBoogie\DateTime;
*
* $time = new DateTime('0000-00-00', 'utc');
* // or
* $time = DateTime::none();
*
* echo $time->is_empty; // true
* echo $time->as_date; // 0000-00-00
* echo $time->as_db; // 0000-00-00 00:00:00
* echo $time; // ""
* </pre>
*
* @property int $timestamp Unix timestamp.
* @property int $day Day of the month.
* @property int $hour Hour of the day.
* @property int $minute Minute of the hour.
* @property int $month Month of the year.
* @property-read int $quarter Quarter of the year.
* @property int $second Second of the minute.
* @property-read int $week Week of the year.
* @property-read int $weekday Day of the week.
* @property int $year Year.
* @property-read int $year_day Day of the year.
* @property-read bool $is_monday `true` if the instance represents Monday.
* @property-read bool $is_tuesday `true` if the instance represents Tuesday.
* @property-read bool $is_wednesday `true` if the instance represents Wednesday.
* @property-read bool $is_thursday `true` if the instance represents Thursday.
* @property-read bool $is_friday `true` if the instance represents Friday.
* @property-read bool $is_saturday `true` if the instance represents Saturday.
* @property-read bool $is_sunday `true` if the instance represents Sunday.
* @property-read bool $is_today `true` if the instance is today.
* @property-read bool $is_past `true` if the instance lies in the past.
* @property-read bool $is_future `true` if the instance lies in the future.
* @property-read bool $is_empty `true` if the instance represents an empty date such as "0000-00-00" or "0000-00-00 00:00:00".
* @property-read DateTime $tomorrow A new instance representing the next day. Time is reset to 00:00:00.
* @property-read DateTime $yesterday A new instance representing the previous day. Time is reset to 00:00:00.
* @property-read DateTime $monday A new instance representing Monday of the week. Time is reset to 00:00:00.
* @property-read DateTime $tuesday A new instance representing Tuesday of the week. Time is reset to 00:00:00.
* @property-read DateTime $wednesday A new instance representing Wednesday of the week. Time is reset to 00:00:00.
* @property-read DateTime $thursday A new instance representing Thursday of the week. Time is reset to 00:00:00.
* @property-read DateTime $friday A new instance representing Friday of the week. Time is reset to 00:00:00.
* @property-read DateTime $saturday A new instance representing Saturday of the week. Time is reset to 00:00:00.
* @property-read DateTime $sunday A new instance representing Sunday of the week. Time is reset to 00:00:00.
*
* @property-read string $as_atom The instance formatted according to {@link ATOM}.
* @property-read string $as_cookie The instance formatted according to {@link COOKIE}.
* @property-read string $as_iso8601 The instance formatted according to {@link ISO8601}.
* @property-read string $as_rfc822 The instance formatted according to {@link RFC822}.
* @property-read string $as_rfc850 The instance formatted according to {@link RFC850}.
* @property-read string $as_rfc1036 The instance formatted according to {@link RFC1036}.
* @property-read string $as_rfc1123 The instance formatted according to {@link RFC1123}.
* @property-read string $as_rfc2822 The instance formatted according to {@link RFC2822}.
* @property-read string $as_rfc3339 The instance formatted according to {@link RFC3339}.
* @property-read string $as_rss The instance formatted according to {@link RSS}.
* @property-read string $as_w3c The instance formatted according to {@link W3C}.
* @property-read string $as_db The instance formatted according to {@link DB}.
* @property-read string $as_number The instance formatted according to {@link NUMBER}.
* @property-read string $as_date The instance formatted according to {@link DATE}.
* @property-read string $as_time The instance formatted according to {@link TIME}.
*
* @property TimeZone $zone The timezone of the instance.
* @property-read DateTime $utc A new instance in the UTC timezone.
* @property-read DateTime $local A new instance in the local timezone.
* @property-read bool $is_utc `true` if the instance is in the UTC timezone.
* @property-read bool $is_local `true` if the instance is in the local timezone.
* @property-read bool $is_dst `true` if time occurs during Daylight Saving Time in its time zone.
*
* @method string format_as_atom() format_as_atom() Formats the instance according to {@link ATOM}.
* @method string format_as_cookie() format_as_cookie() Formats the instance according to {@link COOKIE}.
* @method string format_as_iso8601() format_as_iso8601() Formats the instance according to {@link ISO8601}.
* @method string format_as_rfc822() format_as_rfc822() Formats the instance according to {@link RFC822}.
* @method string format_as_rfc850() format_as_rfc850() Formats the instance according to {@link RFC850}.
* @method string format_as_rfc1036() format_as_rfc1036() Formats the instance according to {@link RFC1036}.
* @method string format_as_rfc1123() format_as_rfc1123() Formats the instance according to {@link RFC1123}.
* @method string format_as_rfc2822() format_as_rfc2822() Formats the instance according to {@link RFC2822}.
* @method string format_as_rfc3339() format_as_rfc3339() Formats the instance according to {@link RFC3339}.
* @method string format_as_rss() format_as_rss() Formats the instance according to {@link RSS}.
* @method string format_as_w3c() format_as_w3c() Formats the instance according to {@link W3C}.
* @method string format_as_db() format_as_db() Formats the instance according to {@link DB}.
* @method string format_as_number() format_as_number() Formats the instance according to {@link NUMBER}.
* @method string format_as_date() format_as_date() Formats the instance according to {@link DATE}.
* @method string format_as_time() format_as_time() Formats the instance according to {@link TIME}.
*
* @see http://en.wikipedia.org/wiki/ISO_8601
*/
class DateTime extends \DateTime implements \JsonSerializable
{
/**
* We redefine the constant to make sure that the cookie uses a valid pattern.
*
* @see http://grokbase.com/t/php/php-bugs/111xynxd6m/php-bug-bug-53879-new-datetime-createfromformat-fails-to-parse-cookie-expiration-date
*
* @var string
*/
const COOKIE = 'l, d-M-Y H:i:s T';
/**
* DB (example: 2013-02-03 20:59:03)
*
* @var string
*/
const DB = 'Y-m-d H:i:s';
/**
* Number (example: 20130203205903)
*
* @var string
*/
const NUMBER = 'YmdHis';
/**
* Date (example: 2013-02-03)
*
* @var string
*/
const DATE = 'Y-m-d';
/**
* Time (example: 20:59:03)
*
* @var string
*/
const TIME = 'H:i:s';
/**
* Callable used to create localized instances.
*
* @var callable
*/
static public $localizer = null;
/**
* Creates a {@link DateTime} instance from a source.
*
* <pre>
* <?php
*
* use ICanBoogie\DateTime;
*
* DateTime::from(new \DateTime('2001-01-01 01:01:01', new \DateTimeZone('Europe/Paris')));
* DateTime::from('2001-01-01 01:01:01', 'Europe/Paris');
* DateTime::from('now');
* </pre>
*
* @param mixed $source
* @param mixed $timezone The time zone to use to create the time. The value is ignored if the
* source is an instance of {@link \DateTime}.
*
* @return DateTime
*/
static public function from($source, $timezone = null)
{
if ($source instanceof static)
{
return clone $source;
}
if ($source instanceof \DateTime)
{
return new static($source->format(self::DB), $source->getTimezone());
}
return new static($source, $timezone);
}
/**
* Returns an instance with the current local time and the local time zone.
*
* **Note:** Subsequent calls return equal times, event if they are minutes apart. _now_
* actually refers to the `REQUEST_TIME` or, if it is now available, to the first time
* the method was invoked.
*
* @return static
*/
static public function now()
{
static $now;
if (!$now)
{
$now = empty($_SERVER['REQUEST_TIME']) ? new static : (new static('@' . $_SERVER['REQUEST_TIME']))->local;
}
return clone $now;
}
/**
* Returns an instance with the current local time and the local time zone.
*
* **Note:** Subsequent calls may return different times.
*
* @return static
*/
static public function right_now()
{
return new static;
}
/**
* Returns an instance representing an empty date ("0000-00-00").
*
* <pre>
* <?php
*
* use ICanBoogie\DateTime;
*
* $d = DateTime::none();
* $d->is_empty; // true
* $d->zone->name; // "UTC"
*
* $d = DateTime::none('Asia/Tokyo');
* $d->is_empty; // true
* $d->zone->name; // "Asia/Tokio"
* </pre>
*
* @param \DateTimeZone|string $timezone The time zone in which the empty date is created.
* Defaults to "UTC".
*
* @return DateTime
*/
static public function none($timezone = 'utc')
{
return new static('0000-00-00', $timezone);
}
/**
* If the time zone is specified as a string a {@link \DateTimeZone} instance is created and
* used instead.
*
* <pre>
* <?php
*
* use ICanBoogie\DateTime;
*
* new DateTime('2001-01-01 01:01:01', new \DateTimeZone('Europe/Paris')));
* new DateTime('2001-01-01 01:01:01', 'Europe/Paris');
* new DateTime;
* </pre>
*
* @param string $time Defaults to "now".
* @param \DateTimeZone|string|null $timezone
*/
public function __construct($time = 'now', $timezone = null)
{
if (is_string($timezone))
{
$timezone = new \DateTimeZone($timezone);
}
#
# PHP 5.3.3 considers null $timezone as an error and will complain that it is not
# a \DateTimeZone instance.
#
$timezone === null ? parent::__construct($time) : parent::__construct($time, $timezone);
}
/**
* @inheritdoc
*/
public function __get($property)
{
if (strpos($property, 'as_') === 0)
{
return $this->{ 'format_' . $property }();
}
switch ($property)
{
case 'timestamp':
return $this->getTimestamp();
case 'year':
return (int) $this->format('Y');
case 'quarter':
return floor(($this->month - 1) / 3) + 1;
case 'month':
return (int) $this->format('m');
case 'week':
return (int) $this->format('W');
case 'year_day':
return (int) $this->format('z') + 1;
case 'weekday':
return (int) $this->format('w') ?: 7;
case 'day':
return (int) $this->format('d');
case 'hour':
return (int) $this->format('H');
case 'minute':
return (int) $this->format('i');
case 'second':
return (int) $this->format('s');
case 'is_monday':
return $this->weekday == 1;
case 'is_tuesday':
return $this->weekday == 2;
case 'is_wednesday':
return $this->weekday == 3;
case 'is_thursday':
return $this->weekday == 4;
case 'is_friday':
return $this->weekday == 5;
case 'is_saturday':
return $this->weekday == 6;
case 'is_sunday':
return $this->weekday == 7;
case 'is_today':
$now = new static('now', $this->zone);
return $this->as_date === $now->as_date;
case 'is_past':
return $this < new static('now', $this->zone);
case 'is_future':
return $this > new static('now', $this->zone);
case 'is_empty':
return $this->year == -1 && $this->month == 11 && $this->day == 30;
case 'tomorrow':
$time = clone $this;
$time->modify('+1 day');
$time->setTime(0, 0, 0);
return $time;
case 'yesterday':
$time = clone $this;
$time->modify('-1 day');
$time->setTime(0, 0, 0);
return $time;
/*
* days
*/
case 'monday':
case 'tuesday':
case 'wednesday':
case 'thursday':
case 'friday':
case 'saturday':
case 'sunday':
return $this->{ 'get_' . $property }();
case 'zone':
return TimeZone::from($this->getTimezone());
case 'utc':
case 'local':
$time = clone $this;
$time->setTimezone($property);
return $time;
case 'is_utc':
return $this->zone->name == 'UTC';
case 'is_local':
return $this->zone->name == date_default_timezone_get();
case 'is_dst':
$timestamp = $this->timestamp;
$transitions = $this->zone->getTransitions($timestamp, $timestamp);
return $transitions[0]['isdst'];
}
if (class_exists('ICanBoogie\PropertyNotDefined'))
{
throw new PropertyNotDefined([ $property, $this ]);
}
else
{
throw new \RuntimeException("Property is not defined: $property.");
}
}
/**
* Returns Monday of the week.
*
* @return DateTime
*/
protected function get_monday()
{
$time = clone $this;
$day = $time->weekday;
if ($day != 1)
{
$time->modify('-' . ($day - 1) . ' day');
}
$time->setTime(0, 0, 0);
return $time;
}
/**
* Returns Tuesday of the week.
*
* @return DateTime
*/
protected function get_tuesday()
{
return $this->monday->modify('+1 day');
}
/**
* Returns Wednesday of the week.
*
* @return DateTime
*/
protected function get_wednesday()
{
return $this->monday->modify('+2 day');
}
/**
* Returns Thursday of the week.
*
* @return DateTime
*/
protected function get_thursday()
{
return $this->monday->modify('+3 day');
}
/**
* Returns Friday of the week.
*
* @return DateTime
*/
protected function get_friday()
{
return $this->monday->modify('+4 day');
}
/**
* Returns Saturday of the week.
*
* @return DateTime
*/
protected function get_saturday()
{
return $this->monday->modify('+5 day');
}
/**
* Returns Sunday of the week.
*
* @return DateTime
*/
protected function get_sunday()
{
$time = clone $this;
$day = $time->weekday;
if ($day != 7)
{
$time->modify('+' . (7 - $day) . ' day');
}
$time->setTime(0, 0, 0);
return $time;
}
/**
* Sets the {@link $year}, {@link $month}, {@link $day}, {@link $hour}, {@link $minute},
* {@link $second}, {@link $timestamp} and {@link $zone} properties.
*
* @throws PropertyNotWritable in attempt to set a read-only property.
* @throws PropertyNotDefined in attempt to set an unsupported property.
*
* @inheritdoc
*/
public function __set($property, $value)
{
static $readonly = [ 'quarter', 'week', 'year_day', 'weekday',
'tomorrow', 'yesterday', 'utc', 'local' ];
switch ($property)
{
case 'year':
case 'month':
case 'day':
case 'hour':
case 'minute':
case 'second':
$this->change([ $property => $value ]);
return;
case 'timestamp':
$this->setTimestamp($value);
return;
case 'zone':
$this->setTimezone($value);
return;
}
if (strpos($property, 'is_') === 0 || strpos($property, 'as_') === 0 || in_array($property, $readonly) || method_exists($this, 'get_' . $property))
{
if (class_exists('ICanBoogie\PropertyNotWritable'))
{
throw new PropertyNotWritable([ $property, $this ]);
}
else
{
throw new \RuntimeException("Property is not writeable: $property.");
}
}
if (class_exists('ICanBoogie\PropertyNotDefined'))
{
throw new PropertyNotDefined([ $property, $this ]);
}
else
{
throw new \RuntimeException("Property is not defined: $property.");
}
}
/**
* Handles the `format_as_*` methods.
*
* If the format is {@link RFC822} or {@link RFC1123} and the time zone is equivalent to GMT,
* the offset `+0000` is replaced by `GMT` according to the specs.
*
* If the format is {@link ISO8601} and the time zone is equivalent to UTC, the offset `+0000`
* is replaced by `Z` according to the specs.
*
* @throws \BadMethodCallException in attempt to call an unsupported method.
*
* @inheritdoc
*/
public function __call($method, $arguments)
{
if (strpos($method, 'format_as_') !== 0)
{
throw new \BadMethodCallException("Unsupported method: $method.");
}
$as = strtoupper(substr($method, strlen('format_as_')));
$format = constant(__CLASS__ . '::' . $as);
$value = $this->format($format);
switch ($as)
{
case 'RFC822':
case 'RFC1123':
return str_replace('+0000', 'GMT', $value);
case 'ISO8601':
return str_replace('+0000', 'Z', $value);
default:
return $value;
}
}
/**
* Returns the datetime formatted as {@link ISO8601}.
*
* @return string The instance rendered as an {@link ISO8601} string, or an empty string if the
* datetime is empty.
*/
public function __toString()
{
return $this->is_empty ? "" : $this->as_iso8601;
}
/**
* Returns a {@link ISO8601} representation of the instance.
*
* @return string
*/
public function jsonSerialize()
{
return (string) $this;
}
/**
* The timezone can be specified as a string.
*
* If the timezone is `local` the timezone returned by {@link date_default_timezone_get()} is
* used instead.
*
* @inheritdoc
*/
public function setTimezone($timezone)
{
if ($timezone === 'local')
{
$timezone = date_default_timezone_get();
}
if (!$timezone instanceof \DateTimeZone)
{
$timezone = new \DateTimeZone($timezone);
}
return parent::setTimezone($timezone);
}
/**
* Modifies the properties of the instance according to the options.
*
* The following properties can be updated: {@link $year}, {@link $month}, {@link $day},
* {@link $hour}, {@link $minute} and {@link $second}.
*
* Note: Values exceeding ranges are added to their parent values.
*
* <pre>
* <?php
*
* use ICanBoogie\DateTime;
*
* $time = new DateTime('now');
* $time->change([ 'year' => 2000, 'second' => 0 ]);
* </pre>
*
* @param array $options
* @param bool $cascade If `true`, time options (`hour`, `minute`, `second`) reset
* cascading, so if only the hour is passed, then minute and second is set to 0. If the hour
* and minute is passed, then second is set to 0.
*
* @return DateTime
*/
public function change(array $options, $cascade=false)
{
static $default_options = [
'year' => null,
'month' => null,
'day' => null,
'hour' => null,
'minute' => null,
'second' => null
];
$options = array_intersect_key($options + $default_options, $default_options);
$year = null;
$month = null;
$day = null;
$hour = null;
$minute = null;
$second = null;
extract($options);
if ($cascade)
{
if ($hour !== null && $minute === null)
{
$minute = 0;
}
if ($minute !== null && $second === null)
{
$second = 0;
}
}
if ($year !== null || $month !== null || $day !== null)
{
$this->setDate
(
$year === null ? $this->year : $year,
$month === null ? $this->month : $month,
$day === null ? $this->day : $day
);
}
if ($hour !== null || $minute !== null || $second !== null)
{
$this->setTime
(
$hour === null ? $this->hour : $hour,
$minute === null ? $this->minute : $minute,
$second === null ? $this->second : $second
);
}
return $this;
}
/**
* Instantiate a new instance with changes properties.
*
* @param array $options
* @param bool $cascade
*
* @return DateTime
*/
public function with(array $options, $cascade = false)
{
$dt = clone $this;
return $dt->change($options, $cascade);
}
/**
* If the instance represents an empty date and the format is {@link DATE} or {@link DB},
* an empty date is returned, respectively "0000-00-00" and "0000-00-00 00:00:00". Note that
* the time information is discarded for {@link DB}. This only apply to {@link DATE} and
* {@link DB} formats. For instance {@link RSS} will return the following string:
* "Wed, 30 Nov -0001 00:00:00 +0000".
*
* @inheritdoc
*/
public function format($format)
{
if (($format == self::DATE || $format == self::DB) && $this->is_empty)
{
return $format == self::DATE ? '0000-00-00' : '0000-00-00 00:00:00';
}
return parent::format($format);
}
/**
* Returns a localized instance.
*
* @param string $locale
*
* @return mixed
*
* @throws \RuntimeException if {@link $localizer} is not defined.
*/
public function localize($locale = 'en')
{
$localizer = self::$localizer;
if (!$localizer)
{
throw new \RuntimeException("Localizer is not defined yet.");
}
return $localizer($this, $locale);
}
}