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<?php |
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namespace UCD\Unicode\TransformationFormat; |
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use UCD\Exception\InvalidArgumentException; |
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use UCD\Unicode\TransformationFormat; |
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class StringUtility |
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{ |
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/** |
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* @var array |
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*/ |
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private static $iconvMap = [ |
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TransformationFormat::EIGHT => 'UTF-8', |
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TransformationFormat::SIXTEEN => 'UTF-16', |
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TransformationFormat::SIXTEEN_BIG_ENDIAN => 'UTF-16BE', |
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TransformationFormat::SIXTEEN_LITTLE_ENDIAN => 'UTF-16LE', |
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TransformationFormat::THIRTY_TWO => 'UTF-32', |
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TransformationFormat::THIRTY_TWO_BIG_ENDIAN => 'UTF-32BE', |
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TransformationFormat::THIRTY_TWO_LITTLE_ENDIAN => 'UTF-32LE' |
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]; |
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/** |
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* @param string $string |
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* @param TransformationFormat $from |
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* @param TransformationFormat $to |
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* @return string |
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*/ |
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public static function convertString($string, TransformationFormat $from, TransformationFormat $to) |
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{ |
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if ($from->equals($to)) { |
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return $string; |
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} |
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$in = self::mapFormat($from); |
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$out = self::mapFormat($to); |
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return iconv($in, $out, $string); |
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} |
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/** |
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* @param string $character |
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* @param TransformationFormat $from |
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* @param TransformationFormat $to |
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* @throws InvalidArgumentException |
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* @return string |
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*/ |
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public static function convertCharacter($character, TransformationFormat $from, TransformationFormat $to) |
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{ |
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$in = self::mapFormat($from); |
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if (iconv_strlen($character, $in) !== 1) { |
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throw new InvalidArgumentException('Single character must be provided'); |
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} |
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return self::convertString($character, $from, $to); |
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} |
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/** |
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* @param TransformationFormat $format |
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* @return string |
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* @throws InvalidArgumentException |
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*/ |
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private static function mapFormat(TransformationFormat $format) |
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{ |
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if (!array_key_exists($format->getType(), self::$iconvMap)) { |
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throw new InvalidArgumentException(); |
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} |
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return self::$iconvMap[$format->getType()]; |
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} |
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/** |
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* @param string $string |
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* @param TransformationFormat $format |
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* @return string[] |
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* @throws InvalidArgumentException |
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*/ |
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public static function split($string, TransformationFormat $format) |
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{ |
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$encoding = self::mapFormat($format); |
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$characters = []; |
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for ($i = 0; $i < iconv_strlen($string, $encoding); $i++) { |
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$character = iconv_substr($string, $i, 1, $encoding); |
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array_push($characters, $character); |
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} |
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return $characters; |
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} |
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} |
nick-jones /
php-ucd
