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<?php |
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namespace Popy\Calendar\Parser\ResultMapper; |
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use DateTimeZone; |
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use Popy\Calendar\Parser\DateLexerResult; |
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use Popy\Calendar\ValueObject\TimeOffset; |
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use Popy\Calendar\Parser\ResultMapperInterface; |
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use Popy\Calendar\ValueObject\DateRepresentationInterface; |
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/** |
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* Maps standard format symbols to DateRepresentationInterface fields. |
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*/ |
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class StandardDate implements ResultMapperInterface |
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{ |
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/** |
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* @inheritDoc |
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*/ |
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public function map(DateLexerResult $parts, DateRepresentationInterface $date) |
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{ |
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$offset = $this->determineOffset($parts, $date->getOffset()); |
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return $date |
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// SI Units |
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// U Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT) |
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// u Microseconds |
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->withUnixTime($parts->get('U')) |
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->withUnixMicroTime($parts->get('u')) |
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// Offset & timezone |
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->withOffset($offset) |
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->withTimezone($this->determineTimezone( |
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$parts, |
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$offset, |
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$date->getTimezone() |
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)) |
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; |
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} |
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/** |
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* Determine date's offset value/dst/abbrevaition from lexer result, |
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* overriding only if a value is found. |
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* |
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* @param DateLexerResult $parts Lexer result. |
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* @param TimeOffset $offset Current date offset. |
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* |
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* @return TimeOffset |
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*/ |
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protected function determineOffset(DateLexerResult $parts, TimeOffset $offset) |
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{ |
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// Z Timezone offset in seconds. |
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if (null !== $value = $parts->get('Z')) { |
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$value = (int)$value; |
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} elseif (null !== $o = $parts->getFirst('O', 'P')) { |
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// O Difference to Greenwich time (GMT) in hours Example: +0200 |
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// P Difference to Greenwich time (GMT) with colon between hours and minutes |
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$o = str_replace(':', '', $o); |
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$sign = substr($o, 0, 1); |
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$hours = (int)substr($o, 1, 2); |
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$minutes = (int)substr($o, 3, 2); |
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$o = $hours * 60 + $minutes; |
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$o = $o * 60; |
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if ($sign === '-') { |
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$o = -$o; |
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} |
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$value = $o; |
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} |
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if (null !== $value) { |
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$offset = $offset->withValue($value); |
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} |
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// I (capital i) Whether or not the date is in daylight saving time |
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if (null !== $t = $parts->get('I')) { |
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$offset = $offset->withDst($t); |
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} |
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// T Timezone abbreviation Examples: EST, MDT ... |
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if (null !== $t = $parts->get('T')) { |
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$offset = $offset->withAbbreviation($t); |
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} |
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return $offset; |
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} |
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/** |
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* Determine date's timezone. If an offset has been found, Timezone has |
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* no effect on the date parsing, but will have on the date display. |
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* |
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* @param DateLexerResult $parts Date lexer results. |
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* @param TimeOffset $offset Date offset. |
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* @param DateTimeZone|null $inputTz Default timezone if any. |
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* |
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* @return DateTimeZone |
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*/ |
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protected function determineTimezone(DateLexerResult $parts, TimeOffset $offset, DateTimeZone $inputTz = null) |
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{ |
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// e Timezone identifier (added in PHP 5.1.0) Examples: UTC, GMT, Atlantic/Azores |
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// O Difference to Greenwich time (GMT) in hours Example: +0200 |
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// P Difference to Greenwich time (GMT) with colon between hours and minutes (added in PHP 5.1.3) Example: +02:00 |
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if (null !== $tz = $parts->getFirst('e', 'O', 'P')) { |
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return new DateTimeZone($tz); |
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} |
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// Create a fixed timezone matching the offset. |
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if (null !== $tz = $offset->buildTimeZone()) { |
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return $tz; |
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} |
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if (null !== $inputTz) { |
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return $inputTz; |
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} |
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// Fallback. |
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return new DateTimeZone(date_default_timezone_get()); |
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} |
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} |
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popy-dev /
popy-calendar
