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<?php |
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/** |
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* This file is part of riesenia/pohoda package. |
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* |
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* Licensed under the MIT License |
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* (c) RIESENIA.com |
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*/ |
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declare(strict_types=1); |
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namespace Riesenia\Pohoda\ValueTransformer; |
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/** |
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* A transformer that rewrites Cyrillic script to its Latin alphabet equivalent. |
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* |
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* Note: This transformation is a phonetic representation and does not provide a translation of the text. |
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*/ |
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class CyrillicTransliterationTransformer implements ValueTransformerInterface |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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public function transform(string $value): string |
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{ |
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$normalized = \Normalizer::normalize($value, \Normalizer::FORM_C); |
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if (false === $normalized) { |
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// @codeCoverageIgnoreStart |
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// must do some error with Normalizer class |
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return $value; |
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} |
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// @codeCoverageIgnoreEnd |
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$transformer = \Transliterator::create('Any-Latin; Latin-ASCII'); |
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if (is_null($transformer)) { |
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// @codeCoverageIgnoreStart |
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// this can happen only if there is no latin encoding installed - not happen with Pohoda which need that |
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return $value; |
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} |
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// @codeCoverageIgnoreEnd |
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$chars = \preg_split('//u', $normalized, -1, PREG_SPLIT_NO_EMPTY); |
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if (false === $chars) { |
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// @codeCoverageIgnoreStart |
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// can happen only when something in preg_split fails |
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return $value; |
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} |
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// @codeCoverageIgnoreEnd |
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$result = ''; |
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foreach ($chars as $char) { |
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$codePoint = \mb_ord($char, 'UTF-8'); |
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if ((0x00400 <= $codePoint && 0x004FF >= $codePoint) // Cyrillic Basic |
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|| (0x00500 <= $codePoint && 0x0052F >= $codePoint) // Cyrillic Supplement |
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|| (0x02DE0 <= $codePoint && 0x02DFF >= $codePoint) // Cyrillic Extended-A |
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|| (0x0A640 <= $codePoint && 0x0A69F >= $codePoint) // Cyrillic Extended-B |
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|| (0x01C80 <= $codePoint && 0x01C8F >= $codePoint) // Cyrillic Extended-C |
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|| (0x1E030 <= $codePoint && 0x1E08F >= $codePoint) // Cyrillic Extended-D |
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) { |
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$result .= $transformer->transliterate($char); |
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} else { |
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$result .= $char; |
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} |
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} |
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return $result; |
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} |
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} |
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alex-kalanis /
pohoda
