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247
vendor/symfony/translation/Extractor/PhpExtractor.php
vendored
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247
vendor/symfony/translation/Extractor/PhpExtractor.php
vendored
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Translation\Extractor;
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use Symfony\Component\Finder\Finder;
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use Symfony\Component\Translation\MessageCatalogue;
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/**
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* PhpExtractor extracts translation messages from a PHP template.
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*
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* @author Michel Salib <michelsalib@hotmail.com>
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*/
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class PhpExtractor extends AbstractFileExtractor implements ExtractorInterface
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{
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const MESSAGE_TOKEN = 300;
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const METHOD_ARGUMENTS_TOKEN = 1000;
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const DOMAIN_TOKEN = 1001;
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/**
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* Prefix for new found message.
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*
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* @var string
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*/
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private $prefix = '';
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/**
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* The sequence that captures translation messages.
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*
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* @var array
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*/
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protected $sequences = [
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[
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'->',
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'trans',
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'(',
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self::MESSAGE_TOKEN,
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',',
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self::METHOD_ARGUMENTS_TOKEN,
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',',
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self::DOMAIN_TOKEN,
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],
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[
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'->',
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'trans',
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'(',
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self::MESSAGE_TOKEN,
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],
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];
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/**
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* {@inheritdoc}
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*/
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public function extract($resource, MessageCatalogue $catalog)
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{
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$files = $this->extractFiles($resource);
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foreach ($files as $file) {
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$this->parseTokens(token_get_all(file_get_contents($file)), $catalog, $file);
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gc_mem_caches();
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function setPrefix(string $prefix)
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{
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$this->prefix = $prefix;
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}
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/**
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* Normalizes a token.
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*
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* @param mixed $token
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*
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* @return string|null
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*/
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protected function normalizeToken($token)
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{
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if (isset($token[1]) && 'b"' !== $token) {
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return $token[1];
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}
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return $token;
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}
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/**
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* Seeks to a non-whitespace token.
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*/
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private function seekToNextRelevantToken(\Iterator $tokenIterator)
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{
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for (; $tokenIterator->valid(); $tokenIterator->next()) {
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$t = $tokenIterator->current();
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if (T_WHITESPACE !== $t[0]) {
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break;
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}
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}
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}
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private function skipMethodArgument(\Iterator $tokenIterator)
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{
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$openBraces = 0;
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for (; $tokenIterator->valid(); $tokenIterator->next()) {
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$t = $tokenIterator->current();
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if ('[' === $t[0] || '(' === $t[0]) {
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++$openBraces;
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}
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if (']' === $t[0] || ')' === $t[0]) {
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--$openBraces;
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}
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if ((0 === $openBraces && ',' === $t[0]) || (-1 === $openBraces && ')' === $t[0])) {
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break;
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}
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}
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}
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/**
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* Extracts the message from the iterator while the tokens
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* match allowed message tokens.
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*/
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private function getValue(\Iterator $tokenIterator)
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{
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$message = '';
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$docToken = '';
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$docPart = '';
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for (; $tokenIterator->valid(); $tokenIterator->next()) {
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$t = $tokenIterator->current();
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if ('.' === $t) {
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// Concatenate with next token
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continue;
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}
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if (!isset($t[1])) {
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break;
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}
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switch ($t[0]) {
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case T_START_HEREDOC:
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$docToken = $t[1];
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break;
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case T_ENCAPSED_AND_WHITESPACE:
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case T_CONSTANT_ENCAPSED_STRING:
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if ('' === $docToken) {
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$message .= PhpStringTokenParser::parse($t[1]);
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} else {
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$docPart = $t[1];
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}
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break;
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case T_END_HEREDOC:
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$message .= PhpStringTokenParser::parseDocString($docToken, $docPart);
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$docToken = '';
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$docPart = '';
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break;
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case T_WHITESPACE:
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break;
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default:
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break 2;
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}
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}
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return $message;
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}
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/**
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* Extracts trans message from PHP tokens.
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*/
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protected function parseTokens(array $tokens, MessageCatalogue $catalog, string $filename)
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{
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$tokenIterator = new \ArrayIterator($tokens);
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for ($key = 0; $key < $tokenIterator->count(); ++$key) {
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foreach ($this->sequences as $sequence) {
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$message = '';
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$domain = 'messages';
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$tokenIterator->seek($key);
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foreach ($sequence as $sequenceKey => $item) {
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$this->seekToNextRelevantToken($tokenIterator);
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if ($this->normalizeToken($tokenIterator->current()) === $item) {
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$tokenIterator->next();
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continue;
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} elseif (self::MESSAGE_TOKEN === $item) {
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$message = $this->getValue($tokenIterator);
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if (\count($sequence) === ($sequenceKey + 1)) {
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break;
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}
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} elseif (self::METHOD_ARGUMENTS_TOKEN === $item) {
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$this->skipMethodArgument($tokenIterator);
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} elseif (self::DOMAIN_TOKEN === $item) {
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$domainToken = $this->getValue($tokenIterator);
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if ('' !== $domainToken) {
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$domain = $domainToken;
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}
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break;
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} else {
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break;
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}
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}
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if ($message) {
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$catalog->set($message, $this->prefix.$message, $domain);
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$metadata = $catalog->getMetadata($message, $domain) ?? [];
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$normalizedFilename = preg_replace('{[\\\\/]+}', '/', $filename);
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$metadata['sources'][] = $normalizedFilename.':'.$tokens[$key][2];
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$catalog->setMetadata($message, $metadata, $domain);
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break;
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}
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}
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}
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}
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/**
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* @return bool
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*
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* @throws \InvalidArgumentException
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*/
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protected function canBeExtracted(string $file)
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{
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return $this->isFile($file) && 'php' === pathinfo($file, PATHINFO_EXTENSION);
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}
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/**
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* {@inheritdoc}
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*/
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protected function extractFromDirectory($directory)
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{
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$finder = new Finder();
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return $finder->files()->name('*.php')->in($directory);
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}
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}
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