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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Translator; |
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use InvalidArgumentException; |
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use function count; |
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use function in_array; |
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use function is_int; |
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class SimpleMessageFormatter implements MessageFormatterInterface |
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{ |
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/** |
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* @psalm-suppress MissingClassConstType |
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*/ |
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private const PLURAL_ONE = 'one'; |
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/** |
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* @psalm-suppress MissingClassConstType |
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*/ |
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private const PLURAL_OTHER = 'other'; |
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/** |
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* @psalm-suppress MissingClassConstType |
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*/ |
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private const PLURAL_KEYS = [self::PLURAL_ONE, self::PLURAL_OTHER]; |
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public function format(string $message, array $parameters, string $locale = 'en-US'): string |
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{ |
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preg_match_all('/{((?>[^{}]+)|(?R))*}/', $message, $matches); |
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$replacements = []; |
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foreach ($matches[0] as $match) { |
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$parts = explode(',', $match); |
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$parameter = trim($parts[0], '{} '); |
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if ($parameter === '') { |
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throw new InvalidArgumentException('Parameter\'s name can not be empty.'); |
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} |
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if (!array_key_exists($parameter, $parameters)) { |
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throw new InvalidArgumentException("\"$parameter\" parameter's value is missing."); |
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} |
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$value = $parameters[$parameter] ?? ''; |
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if (!is_scalar($value)) { |
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continue; |
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} |
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if (count($parts) === 1) { |
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$replacements[$match] = $value; |
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continue; |
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} |
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$format = ltrim($parts[1]); |
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$format = rtrim($format, '}'); |
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switch ($format) { |
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case 'plural': |
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$options = $parts[2] ?? ''; |
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$replacements[$match] = self::pluralize($value, $options); |
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break; |
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default: |
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$replacements[$match] = $value; |
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} |
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} |
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return strtr($message, $replacements); |
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} |
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private static function pluralize(mixed $value, string $options): string |
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{ |
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if (!$options) { |
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throw new InvalidArgumentException('Missing plural keys: ' . self::formatList(self::PLURAL_KEYS) . '.'); |
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} |
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if (!is_int($value)) { |
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throw new InvalidArgumentException('Only integer numbers are supported with plural format.'); |
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} |
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preg_match_all('/([^{}\s]+)({(.*?)})/', $options, $pluralMatches); |
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$map = []; |
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foreach ($pluralMatches[1] as $index => $match) { |
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if (!in_array($match, self::PLURAL_KEYS, true)) { |
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continue; |
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} |
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$map[$match] = $pluralMatches[3][$index]; |
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} |
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if (!isset($map[self::PLURAL_ONE])) { |
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throw new InvalidArgumentException('Missing plural key "' . self::PLURAL_ONE . '".'); |
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} |
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if (!isset($map[self::PLURAL_OTHER])) { |
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throw new InvalidArgumentException('Missing plural key "' . self::PLURAL_OTHER . '".'); |
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} |
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return $value === 1 ? $map[self::PLURAL_ONE] : $map[self::PLURAL_OTHER]; |
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} |
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/** |
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* @param string[] $items |
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*/ |
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private static function formatList(array $items): string |
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{ |
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return implode(', ', array_map(fn (string $value): string => '"' . $value . '"', $items)); |
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} |
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} |
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yiisoft /
translator
