* @author Hugo Hamon * * @throws ExceptionInterface */ class UnicodeString extends AbstractUnicodeString { public function __construct(string $string = '') { $this->string = normalizer_is_normalized($string) ? $string : normalizer_normalize($string); if (false === $this->string) { throw new InvalidArgumentException('Invalid UTF-8 string.'); } } public function append(string ...$suffix): AbstractString { $str = clone $this; $str->string = $this->string.(1 >= \count($suffix) ? ($suffix[0] ?? '') : implode('', $suffix)); normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string); if (false === $str->string) { throw new InvalidArgumentException('Invalid UTF-8 string.'); } return $str; } public function chunk(int $length = 1): array { if (1 > $length) { throw new InvalidArgumentException('The chunk length must be greater than zero.'); } if ('' === $this->string) { return []; } $rx = '/('; while (65535 < $length) { $rx .= '\X{65535}'; $length -= 65535; } $rx .= '\X{'.$length.'})/u'; $str = clone $this; $chunks = []; foreach (preg_split($rx, $this->string, -1, \PREG_SPLIT_DELIM_CAPTURE | \PREG_SPLIT_NO_EMPTY) as $chunk) { $str->string = $chunk; $chunks[] = clone $str; } return $chunks; } public function endsWith($suffix): bool { if ($suffix instanceof AbstractString) { $suffix = $suffix->string; } elseif (\is_array($suffix) || $suffix instanceof \Traversable) { return parent::endsWith($suffix); } else { $suffix = (string) $suffix; } $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC; normalizer_is_normalized($suffix, $form) ?: $suffix = normalizer_normalize($suffix, $form); if ('' === $suffix || false === $suffix) { return false; } if ($this->ignoreCase) { return 0 === mb_stripos(grapheme_extract($this->string, \strlen($suffix), \GRAPHEME_EXTR_MAXBYTES, \strlen($this->string) - \strlen($suffix)), $suffix, 0, 'UTF-8'); } return $suffix === grapheme_extract($this->string, \strlen($suffix), \GRAPHEME_EXTR_MAXBYTES, \strlen($this->string) - \strlen($suffix)); } public function equalsTo($string): bool { if ($string instanceof AbstractString) { $string = $string->string; } elseif (\is_array($string) || $string instanceof \Traversable) { return parent::equalsTo($string); } else { $string = (string) $string; } $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC; normalizer_is_normalized($string, $form) ?: $string = normalizer_normalize($string, $form); if ('' !== $string && false !== $string && $this->ignoreCase) { return \strlen($string) === \strlen($this->string) && 0 === mb_stripos($this->string, $string, 0, 'UTF-8'); } return $string === $this->string; } public function indexOf($needle, int $offset = 0): ?int { if ($needle instanceof AbstractString) { $needle = $needle->string; } elseif (\is_array($needle) || $needle instanceof \Traversable) { return parent::indexOf($needle, $offset); } else { $needle = (string) $needle; } $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC; normalizer_is_normalized($needle, $form) ?: $needle = normalizer_normalize($needle, $form); if ('' === $needle || false === $needle) { return null; } try { $i = $this->ignoreCase ? grapheme_stripos($this->string, $needle, $offset) : grapheme_strpos($this->string, $needle, $offset); } catch (\ValueError $e) { return null; } return false === $i ? null : $i; } public function indexOfLast($needle, int $offset = 0): ?int { if ($needle instanceof AbstractString) { $needle = $needle->string; } elseif (\is_array($needle) || $needle instanceof \Traversable) { return parent::indexOfLast($needle, $offset); } else { $needle = (string) $needle; } $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC; normalizer_is_normalized($needle, $form) ?: $needle = normalizer_normalize($needle, $form); if ('' === $needle || false === $needle) { return null; } $string = $this->string; if (0 > $offset) { // workaround https://bugs.php.net/74264 if (0 > $offset += grapheme_strlen($needle)) { $string = grapheme_substr($string, 0, $offset); } $offset = 0; } $i = $this->ignoreCase ? grapheme_strripos($string, $needle, $offset) : grapheme_strrpos($string, $needle, $offset); return false === $i ? null : $i; } public function join(array $strings, ?string $lastGlue = null): AbstractString { $str = parent::join($strings, $lastGlue); normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string); return $str; } public function length(): int { return grapheme_strlen($this->string); } /** * @return static */ public function normalize(int $form = self::NFC): parent { $str = clone $this; if (\in_array($form, [self::NFC, self::NFKC], true)) { normalizer_is_normalized($str->string, $form) ?: $str->string = normalizer_normalize($str->string, $form); } elseif (!\in_array($form, [self::NFD, self::NFKD], true)) { throw new InvalidArgumentException('Unsupported normalization form.'); } elseif (!normalizer_is_normalized($str->string, $form)) { $str->string = normalizer_normalize($str->string, $form); $str->ignoreCase = null; } return $str; } public function prepend(string ...$prefix): AbstractString { $str = clone $this; $str->string = (1 >= \count($prefix) ? ($prefix[0] ?? '') : implode('', $prefix)).$this->string; normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string); if (false === $str->string) { throw new InvalidArgumentException('Invalid UTF-8 string.'); } return $str; } public function replace(string $from, string $to): AbstractString { $str = clone $this; normalizer_is_normalized($from) ?: $from = normalizer_normalize($from); if ('' !== $from && false !== $from) { $tail = $str->string; $result = ''; $indexOf = $this->ignoreCase ? 'grapheme_stripos' : 'grapheme_strpos'; while ('' !== $tail && false !== $i = $indexOf($tail, $from)) { $slice = grapheme_substr($tail, 0, $i); $result .= $slice.$to; $tail = substr($tail, \strlen($slice) + \strlen($from)); } $str->string = $result.$tail; normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string); if (false === $str->string) { throw new InvalidArgumentException('Invalid UTF-8 string.'); } } return $str; } public function replaceMatches(string $fromRegexp, $to): AbstractString { $str = parent::replaceMatches($fromRegexp, $to); normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string); return $str; } public function slice(int $start = 0, ?int $length = null): AbstractString { $str = clone $this; if (\PHP_VERSION_ID < 80000 && 0 > $start && grapheme_strlen($this->string) < -$start) { $start = 0; } $str->string = (string) grapheme_substr($this->string, $start, $length ?? 2147483647); return $str; } public function splice(string $replacement, int $start = 0, ?int $length = null): AbstractString { $str = clone $this; if (\PHP_VERSION_ID < 80000 && 0 > $start && grapheme_strlen($this->string) < -$start) { $start = 0; } $start = $start ? \strlen(grapheme_substr($this->string, 0, $start)) : 0; $length = $length ? \strlen(grapheme_substr($this->string, $start, $length ?? 2147483647)) : $length; $str->string = substr_replace($this->string, $replacement, $start, $length ?? 2147483647); normalizer_is_normalized($str->string) ?: $str->string = normalizer_normalize($str->string); if (false === $str->string) { throw new InvalidArgumentException('Invalid UTF-8 string.'); } return $str; } public function split(string $delimiter, ?int $limit = null, ?int $flags = null): array { if (1 > $limit = $limit ?? 2147483647) { throw new InvalidArgumentException('Split limit must be a positive integer.'); } if ('' === $delimiter) { throw new InvalidArgumentException('Split delimiter is empty.'); } if (null !== $flags) { return parent::split($delimiter.'u', $limit, $flags); } normalizer_is_normalized($delimiter) ?: $delimiter = normalizer_normalize($delimiter); if (false === $delimiter) { throw new InvalidArgumentException('Split delimiter is not a valid UTF-8 string.'); } $str = clone $this; $tail = $this->string; $chunks = []; $indexOf = $this->ignoreCase ? 'grapheme_stripos' : 'grapheme_strpos'; while (1 < $limit && false !== $i = $indexOf($tail, $delimiter)) { $str->string = grapheme_substr($tail, 0, $i); $chunks[] = clone $str; $tail = substr($tail, \strlen($str->string) + \strlen($delimiter)); --$limit; } $str->string = $tail; $chunks[] = clone $str; return $chunks; } public function startsWith($prefix): bool { if ($prefix instanceof AbstractString) { $prefix = $prefix->string; } elseif (\is_array($prefix) || $prefix instanceof \Traversable) { return parent::startsWith($prefix); } else { $prefix = (string) $prefix; } $form = null === $this->ignoreCase ? \Normalizer::NFD : \Normalizer::NFC; normalizer_is_normalized($prefix, $form) ?: $prefix = normalizer_normalize($prefix, $form); if ('' === $prefix || false === $prefix) { return false; } if ($this->ignoreCase) { return 0 === mb_stripos(grapheme_extract($this->string, \strlen($prefix), \GRAPHEME_EXTR_MAXBYTES), $prefix, 0, 'UTF-8'); } return $prefix === grapheme_extract($this->string, \strlen($prefix), \GRAPHEME_EXTR_MAXBYTES); } public function __wakeup() { if (!\is_string($this->string)) { throw new \BadMethodCallException('Cannot unserialize '.__CLASS__); } normalizer_is_normalized($this->string) ?: $this->string = normalizer_normalize($this->string); } public function __clone() { if (null === $this->ignoreCase) { normalizer_is_normalized($this->string) ?: $this->string = normalizer_normalize($this->string); } $this->ignoreCase = false; } }