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<?php |
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namespace ICanBoogie\CLDR; |
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use ICanBoogie\CLDR\Locale\ListPattern; |
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/** |
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* Formats variable-length lists of things such as "Monday, Tuesday, Friday, and Saturday". |
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* |
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* @see http://www.unicode.org/reports/tr35/tr35-general.html#ListPatterns |
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* |
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* @implements Localizable<ListFormatter, LocalizedListFormatter> |
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*/ |
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final class ListFormatter implements Formatter, Localizable |
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{ |
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/** |
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* Formats variable-length lists of scalars. |
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* |
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* @param scalar[] $list |
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*/ |
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public function format(array $list, ListPattern $list_pattern): string |
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{ |
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$list = array_values($list); |
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return match (count($list)) { |
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0 => "", |
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1 => (string)current($list), |
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2 => $this->format_two($list, $list_pattern), |
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default => $this->format_many($list, $list_pattern), |
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}; |
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} |
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/** |
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* @param scalar[] $list |
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*/ |
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private function format_two(array $list, ListPattern $list_pattern): string |
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{ |
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return $this->format_pattern($list_pattern->two, (string)$list[0], (string)$list[1]); |
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} |
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/** |
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* @param scalar[] $list |
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*/ |
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private function format_many(array $list, ListPattern $list_pattern): string |
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{ |
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$n = count($list) - 1; |
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$v1 = (string)$list[$n]; |
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for ($i = $n - 1; $i > -1; $i--) { |
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$v0 = $list[$i]; |
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$pattern = match ($i) { |
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0 => $list_pattern->start, |
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$n - 1 => $list_pattern->end, |
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default => $list_pattern->middle, |
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}; |
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$v1 = $this->format_pattern($pattern, (string)$v0, (string)$v1); |
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} |
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return $v1; |
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} |
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private function format_pattern(string $pattern, string $v0, string $v1): string |
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{ |
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return strtr($pattern, [ |
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'{0}' => $v0, |
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'{1}' => $v1 |
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]); |
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} |
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public function localized(Locale $locale): LocalizedListFormatter |
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{ |
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return new LocalizedListFormatter($this, $locale); |
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} |
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} |
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ICanBoogie /
CLDR
