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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 parser that accepts various strings representing a year, and only a year. Accepts |
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* years before common era as well as optional thousands separators. Should be called after |
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* YearMonthTimeParser when you want to accept both formats, because strings like "1 999" may either |
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* represent a month and a year or a year with digit grouping. |
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* |
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* @since 0.8.4 |
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* |
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* @license GPL-2.0+ |
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* @author Addshore |
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* @author Thiemo Kreuz |
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*/ |
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class YearTimeParser extends StringValueParser { |
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const FORMAT_NAME = 'year'; |
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/** |
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* Option to allow parsing of years with localized digit group separators. For example, the |
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* English year -10,000 (with a comma) is written as -10.000 (with a dot) in German. |
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*/ |
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const OPT_DIGIT_GROUP_SEPARATOR = 'digitGroupSeparator'; |
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/** |
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* Default, canonical digit group separator, as in the year -10,000. |
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*/ |
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const CANONICAL_DIGIT_GROUP_SEPARATOR = ','; |
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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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* @see StringValueParser::__construct |
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* |
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* @param ValueParser|null $eraParser |
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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( |
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self::OPT_DIGIT_GROUP_SEPARATOR, |
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self::CANONICAL_DIGIT_GROUP_SEPARATOR |
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); |
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$this->eraParser = $eraParser ?: new EraParser( $this->options ); |
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$this->isoTimestampParser = new IsoTimestampParser( null, $this->options ); |
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} |
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/** |
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* @see StringValueParser::stringParse |
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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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list( $sign, $year ) = $this->eraParser->parse( $value ); |
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$year = trim( $year ); |
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// Negative dates usually don't have a month, assume non-digits are thousands separators |
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if ( $sign === '-' ) { |
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$separator = $this->getOption( self::OPT_DIGIT_GROUP_SEPARATOR ); |
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// Always accept ISO (e.g. "1 000 BC") as well as programming style (e.g. "-1_000") |
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$year = preg_replace( |
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'/(?<=\d)[' . preg_quote( $separator, '/' ) . '\s_](?=\d)/', |
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'', |
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$year |
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); |
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} |
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if ( !preg_match( '/^\d+\z/', $year ) ) { |
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throw new ParseException( 'Failed to parse year', $value, self::FORMAT_NAME ); |
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} |
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return $this->isoTimestampParser->parse( $sign . $year . '-00-00T00:00:00Z' ); |
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} |
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} |
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DataValues /
Time
