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<?php |
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namespace Popy\Calendar\ValueObject; |
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use DateTimeZone; |
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use DateTimeInterface; |
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/** |
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* Represents the time offset induced by timezones and day saving time. |
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* It is an immutable object. |
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* |
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* A TimeOffset MAY NOT be aware of its properties (value, dst status, |
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* abbreviation, usually when it's been built by a parser). |
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*/ |
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class TimeOffset |
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{ |
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/** |
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* Offset value. |
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* |
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* @var integer|null |
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*/ |
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protected $value; |
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/** |
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* Day saving time status. |
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* |
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* @var boolean|null |
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*/ |
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protected $dst; |
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/** |
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* Offset abbreviation. |
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* |
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* @var string|null |
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*/ |
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protected $abbreviation; |
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/** |
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* Class constructor. |
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* |
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* @param integer|null $value Offset value. |
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* @param boolean|null $dst Day saving time status. |
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* @param string|null $abbreviation Offset abbreviation. |
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*/ |
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public function __construct($value = null, $dst = null, $abbreviation = null) |
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{ |
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$this->value = $value; |
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$this->dst = $dst; |
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$this->abbreviation = $abbreviation; |
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} |
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/** |
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* Instanciates a TimeOffset from a DateTimeInterface, using the format |
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* method to extract properties. |
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* |
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* @param DateTimeInterface $date |
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* |
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* @return static |
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*/ |
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public static function buildFromDateTimeInterface(DateTimeInterface $date) |
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{ |
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$parts = explode('|', $date->format('Z|I|T')); |
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return new static((int)$parts[0], (bool)$parts[1], $parts[2]); |
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} |
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/** |
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* Gets the offset value. |
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* |
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* @return integer|null |
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*/ |
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public function getValue() |
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{ |
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return $this->value; |
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} |
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/** |
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* Checks day saving time status. |
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* |
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* @return boolean|null |
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*/ |
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public function isDst() |
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{ |
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return $this->dst; |
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} |
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/** |
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* Gets the Offset abbreviation.. |
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* |
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* @return string|null |
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*/ |
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public function getAbbreviation() |
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{ |
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return $this->abbreviation; |
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} |
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/** |
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* Gets a new TimeOffset instance with the input value. |
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* |
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* @param integer|null $value |
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* |
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* @return static |
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*/ |
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public function withValue($value) |
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{ |
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$res = clone $this; |
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$res->value = $value; |
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return $res; |
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} |
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/** |
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* Gets a new TimeOffset instance with the input dst. |
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* |
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* @param boolean|null $dst |
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* |
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* @return static |
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*/ |
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public function withDst($dst) |
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{ |
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$res = clone $this; |
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$res->dst = $dst; |
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return $res; |
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} |
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/** |
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* Gets a new TimeOffset instance with the input abbreviation. |
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* |
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* @param string|null $abbreviation |
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* |
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* @return static |
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*/ |
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public function withAbbreviation($abbreviation) |
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{ |
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$res = clone $this; |
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$res->abbreviation = $abbreviation; |
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return $res; |
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} |
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/** |
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* Build a DateTimeZone object based on TimeOffset properties, if possible. |
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* |
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* @return DateTimeZone|null |
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*/ |
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public function buildTimeZone() |
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{ |
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if (null !== $this->value) { |
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$sign = $this->value < 0 ? '-' : '+'; |
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$value = intval(abs($this->value) / 60); |
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return new DateTimeZone(sprintf( |
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'%s%02d:%02d', |
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$sign, |
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intval($value / 60), |
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$value % 60 |
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)); |
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} |
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} |
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} |
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popy-dev /
popy-calendar
