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<?php |
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namespace ValueParsers; |
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use DataValues\TimeValue; |
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/** |
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* A straight time parser with a strict rule set that only accepts YMD, DMY, MDY and YDM formatted |
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* dates if they can not be confused with an other format. |
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* |
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* @since 0.8.1 |
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* |
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* @licence GNU GPL v2+ |
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* @author Thiemo Mättig |
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*/ |
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class YearMonthDayTimeParser extends StringValueParser { |
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const FORMAT_NAME = 'datetime'; |
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/** |
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* @var ValueParser |
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*/ |
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private $eraParser; |
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/** |
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* @var ValueParser |
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*/ |
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private $isoTimestampParser; |
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/** |
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* @param ValueParser|null $eraParser String parser that detects signs, "BC" suffixes and such and |
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* returns an array with the detected sign character and the remaining value. |
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* @param ParserOptions|null $options |
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*/ |
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public function __construct( ValueParser $eraParser = null, ParserOptions $options = null ) { |
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parent::__construct( $options ); |
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$this->defaultOption( IsoTimestampParser::OPT_PRECISION, null ); |
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$this->defaultOption( IsoTimestampParser::OPT_PRECISION, null ); |
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$this->eraParser = $eraParser ?: new EraParser(); |
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$this->isoTimestampParser = new IsoTimestampParser( null, $this->options ); |
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} |
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/** |
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* @param string $value |
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* |
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* @throws ParseException |
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* @return TimeValue |
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*/ |
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protected function stringParse( $value ) { |
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try { |
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list( $sign, $preparsedValue ) = $this->eraParser->parse( $value ); |
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list( $signedYear, $month, $day ) = $this->parseYearMonthDay( $preparsedValue ); |
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if ( substr( $signedYear, 0, 1 ) !== '-' ) { |
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$signedYear = $sign . $signedYear; |
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} elseif ( $sign === '-' ) { |
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throw new ParseException( 'Two eras found' ); |
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} |
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return $this->newTimeValue( $signedYear, $month, $day ); |
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} catch ( ParseException $ex ) { |
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throw new ParseException( $ex->getMessage(), $value, self::FORMAT_NAME ); |
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} |
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} |
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/** |
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* @param string $value |
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* |
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* @throws ParseException |
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* @return string[] |
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*/ |
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private function parseYearMonthDay( $value ) { |
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if ( !preg_match( '/^\D*?(-?\d+)\D+(\d+)\D+?(-?\d+)\D*$/', $value, $matches ) ) { |
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throw new ParseException( 'Can not find three numbers' ); |
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} |
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// A 32 in the first spot can not be confused with anything. |
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if ( $matches[1] < 1 || $matches[1] > 31 ) { |
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if ( $matches[3] > 12 || $matches[2] == $matches[3] ) { |
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list( , $signedYear, $month, $day ) = $matches; |
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} elseif ( $matches[2] > 12 ) { |
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list( , $signedYear, $day, $month ) = $matches; |
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} else { |
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throw new ParseException( 'Can not distinguish YDM and YMD' ); |
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} |
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} elseif ( $matches[3] < 1 || $matches[3] > 59 |
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// A 59 in the third spot may be a second, but can not if the first number is > 24. |
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// A 31 in the last spot may be the day, but can not if it's negative. |
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|| ( abs( $matches[1] ) > 24 && $matches[3] > 31 ) |
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) { |
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if ( $matches[1] > 12 || $matches[1] == $matches[2] ) { |
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list( , $day, $month, $signedYear ) = $matches; |
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} elseif ( $matches[2] > 12 ) { |
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list( , $month, $day, $signedYear ) = $matches; |
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} else { |
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throw new ParseException( 'Can not distinguish DMY and MDY' ); |
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} |
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} else { |
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// Formats DYM and MYD do not exist. |
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throw new ParseException( 'Can not identify year' ); |
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} |
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return array( $signedYear, $month, $day ); |
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} |
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/** |
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* @param string $signedYear |
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* @param string $month |
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* @param string $day |
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* |
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* @throws ParseException |
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* @return TimeValue |
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*/ |
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private function newTimeValue( $signedYear, $month, $day ) { |
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if ( $month < 1 || $month > 12 ) { |
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throw new ParseException( 'Month out of range' ); |
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} elseif ( $day < 1 || $day > 31 ) { |
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throw new ParseException( 'Day out of range' ); |
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} |
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return $this->isoTimestampParser->parse( |
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sprintf( '%s-%02s-%02sT00:00:00Z', $signedYear, $month, $day ) |
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); |
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} |
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} |
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DataValues /
Time
