Symfony\Component\String\UnicodeString

Complexity

Total Complexity

104

Size/Duplication

Total Lines	327
Duplicated Lines	0 %

Importance

Changes

0

<?php
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;
        }

        $i = $this->ignoreCase ? grapheme_stripos($this->string, $needle, $offset) : grapheme_strpos($this->string, $needle, $offset);

        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 (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;
        $str->string = (string) grapheme_substr($this->string, $start, $length ?? \PHP_INT_MAX);

        return $str;
    }

    public function splice(string $replacement, int $start = 0, int $length = null): AbstractString
    {
        $str = clone $this;
        $start = $start ? \strlen(grapheme_substr($this->string, 0, $start)) : 0;
        $length = $length ? \strlen(grapheme_substr($this->string, $start, $length ?? \PHP_INT_MAX)) : $length;
        $str->string = substr_replace($this->string, $replacement, $start, $length ?? \PHP_INT_MAX);
        normalizer_is_normalized($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 ?? \PHP_INT_MAX) {
            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()
    {
        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;
    }