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Edit File: CodePointString.php

<?php
namespace MailPoetVendor\Symfony\Component\String;
if (!defined('ABSPATH')) exit;
use MailPoetVendor\Symfony\Component\String\Exception\ExceptionInterface;
use MailPoetVendor\Symfony\Component\String\Exception\InvalidArgumentException;
class CodePointString extends AbstractUnicodeString
{
 public function __construct(string $string = '')
 {
 if ('' !== $string && !\preg_match('//u', $string)) {
 throw new InvalidArgumentException('Invalid UTF-8 string.');
 }
 $this->string = $string;
 }
 public function append(string ...$suffix) : AbstractString
 {
 $str = clone $this;
 $str->string .= 1 >= \count($suffix) ? $suffix[0] ?? '' : \implode('', $suffix);
 if (!\preg_match('//u', $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 .= '.{65535}';
 $length -= 65535;
 }
 $rx .= '.{' . $length . '})/us';
 $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 codePointsAt(int $offset) : array
 {
 $str = $offset ? $this->slice($offset, 1) : $this;
 return '' === $str->string ? [] : [\mb_ord($str->string, 'UTF-8')];
 }
 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;
 }
 if ('' === $suffix || !\preg_match('//u', $suffix)) {
 return \false;
 }
 if ($this->ignoreCase) {
 return \preg_match('{' . \preg_quote($suffix) . '$}iuD', $this->string);
 }
 return \strlen($this->string) >= \strlen($suffix) && 0 === \substr_compare($this->string, $suffix, -\strlen($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;
 }
 if ('' !== $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;
 }
 if ('' === $needle) {
 return null;
 }
 $i = $this->ignoreCase ? \mb_stripos($this->string, $needle, $offset, 'UTF-8') : \mb_strpos($this->string, $needle, $offset, 'UTF-8');
 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;
 }
 if ('' === $needle) {
 return null;
 }
 $i = $this->ignoreCase ? \mb_strripos($this->string, $needle, $offset, 'UTF-8') : \mb_strrpos($this->string, $needle, $offset, 'UTF-8');
 return \false === $i ? null : $i;
 }
 public function length() : int
 {
 return \mb_strlen($this->string, 'UTF-8');
 }
 public function prepend(string ...$prefix) : AbstractString
 {
 $str = clone $this;
 $str->string = (1 >= \count($prefix) ? $prefix[0] ?? '' : \implode('', $prefix)) . $this->string;
 if (!\preg_match('//u', $str->string)) {
 throw new InvalidArgumentException('Invalid UTF-8 string.');
 }
 return $str;
 }
 public function replace(string $from, string $to) : AbstractString
 {
 $str = clone $this;
 if ('' === $from || !\preg_match('//u', $from)) {
 return $str;
 }
 if ('' !== $to && !\preg_match('//u', $to)) {
 throw new InvalidArgumentException('Invalid UTF-8 string.');
 }
 if ($this->ignoreCase) {
 $str->string = \implode($to, \preg_split('{' . \preg_quote($from) . '}iuD', $this->string));
 } else {
 $str->string = \str_replace($from, $to, $this->string);
 }
 return $str;
 }
 public function slice(int $start = 0, ?int $length = null) : AbstractString
 {
 $str = clone $this;
 $str->string = \mb_substr($this->string, $start, $length, 'UTF-8');
 return $str;
 }
 public function splice(string $replacement, int $start = 0, ?int $length = null) : AbstractString
 {
 if (!\preg_match('//u', $replacement)) {
 throw new InvalidArgumentException('Invalid UTF-8 string.');
 }
 $str = clone $this;
 $start = $start ? \strlen(\mb_substr($this->string, 0, $start, 'UTF-8')) : 0;
 $length = $length ? \strlen(\mb_substr($this->string, $start, $length, 'UTF-8')) : $length;
 $str->string = \substr_replace($this->string, $replacement, $start, $length ?? \PHP_INT_MAX);
 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);
 }
 if (!\preg_match('//u', $delimiter)) {
 throw new InvalidArgumentException('Split delimiter is not a valid UTF-8 string.');
 }
 $str = clone $this;
 $chunks = $this->ignoreCase ? \preg_split('{' . \preg_quote($delimiter) . '}iuD', $this->string, $limit) : \explode($delimiter, $this->string, $limit);
 foreach ($chunks as &$chunk) {
 $str->string = $chunk;
 $chunk = 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;
 }
 if ('' === $prefix || !\preg_match('//u', $prefix)) {
 return \false;
 }
 if ($this->ignoreCase) {
 return 0 === \mb_stripos($this->string, $prefix, 0, 'UTF-8');
 }
 return 0 === \strncmp($this->string, $prefix, \strlen($prefix));
 }
}

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