* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Polyfill\Intl\Icu\DateFormat; /** * Parser and formatter for month format. * * @author Igor Wiedler * * @internal */ class MonthTransformer extends Transformer { protected static $months = [ 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December', ]; /** * Short months names (first 3 letters). */ protected static $shortMonths = []; /** * Flipped $months array, $name => $index. */ protected static $flippedMonths = []; /** * Flipped $shortMonths array, $name => $index. */ protected static $flippedShortMonths = []; public function __construct() { if (0 === \count(self::$shortMonths)) { self::$shortMonths = array_map(function ($month) { return substr($month, 0, 3); }, self::$months); self::$flippedMonths = array_flip(self::$months); self::$flippedShortMonths = array_flip(self::$shortMonths); } } public function format(\DateTime $dateTime, int $length): string { $matchLengthMap = [ 1 => 'n', 2 => 'm', 3 => 'M', 4 => 'F', ]; if (isset($matchLengthMap[$length])) { return $dateTime->format($matchLengthMap[$length]); } if (5 === $length) { return substr($dateTime->format('M'), 0, 1); } return $this->padLeft($dateTime->format('m'), $length); } public function getReverseMatchingRegExp(int $length): string { switch ($length) { case 1: $regExp = '\d{1,2}'; break; case 3: $regExp = implode('|', self::$shortMonths); break; case 4: $regExp = implode('|', self::$months); break; case 5: $regExp = '[JFMASOND]'; break; default: $regExp = '\d{1,'.$length.'}'; break; } return $regExp; } public function extractDateOptions(string $matched, int $length): array { if (!is_numeric($matched)) { if (3 === $length) { $matched = self::$flippedShortMonths[$matched] + 1; } elseif (4 === $length) { $matched = self::$flippedMonths[$matched] + 1; } elseif (5 === $length) { // IntlDateFormatter::parse() always returns false for MMMMM or LLLLL $matched = false; } } else { $matched = (int) $matched; } return [ 'month' => $matched, ]; } }