4 * This file is part of the Symfony package.
6 * (c) Fabien Potencier <fabien@symfony.com>
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
12 namespace Symfony\Component\Translation\Extractor;
14 use Symfony\Component\Finder\Finder;
15 use Symfony\Component\Translation\MessageCatalogue;
18 * PhpExtractor extracts translation messages from a PHP template.
20 * @author Michel Salib <michelsalib@hotmail.com>
22 class PhpExtractor extends AbstractFileExtractor implements ExtractorInterface
24 const MESSAGE_TOKEN = 300;
25 const METHOD_ARGUMENTS_TOKEN = 1000;
26 const DOMAIN_TOKEN = 1001;
29 * Prefix for new found message.
36 * The sequence that captures translation messages.
40 protected $sequences = array(
47 self::METHOD_ARGUMENTS_TOKEN,
57 self::METHOD_ARGUMENTS_TOKEN,
59 self::METHOD_ARGUMENTS_TOKEN,
80 public function extract($resource, MessageCatalogue $catalog)
82 $files = $this->extractFiles($resource);
83 foreach ($files as $file) {
84 $this->parseTokens(token_get_all(file_get_contents($file)), $catalog);
86 if (\PHP_VERSION_ID >= 70000) {
87 // PHP 7 memory manager will not release after token_get_all(), see https://bugs.php.net/70098
96 public function setPrefix($prefix)
98 $this->prefix = $prefix;
102 * Normalizes a token.
104 * @param mixed $token
108 protected function normalizeToken($token)
110 if (isset($token[1]) && 'b"' !== $token) {
118 * Seeks to a non-whitespace token.
120 private function seekToNextRelevantToken(\Iterator $tokenIterator)
122 for (; $tokenIterator->valid(); $tokenIterator->next()) {
123 $t = $tokenIterator->current();
124 if (T_WHITESPACE !== $t[0]) {
130 private function skipMethodArgument(\Iterator $tokenIterator)
134 for (; $tokenIterator->valid(); $tokenIterator->next()) {
135 $t = $tokenIterator->current();
137 if ('[' === $t[0] || '(' === $t[0]) {
141 if (']' === $t[0] || ')' === $t[0]) {
145 if ((0 === $openBraces && ',' === $t[0]) || (-1 === $openBraces && ')' === $t[0])) {
152 * Extracts the message from the iterator while the tokens
153 * match allowed message tokens.
155 private function getValue(\Iterator $tokenIterator)
160 for (; $tokenIterator->valid(); $tokenIterator->next()) {
161 $t = $tokenIterator->current();
167 case T_START_HEREDOC:
170 case T_ENCAPSED_AND_WHITESPACE:
171 case T_CONSTANT_ENCAPSED_STRING:
175 return PhpStringTokenParser::parseDocString($docToken, $message);
182 $message = PhpStringTokenParser::parse($message);
189 * Extracts trans message from PHP tokens.
191 * @param array $tokens
192 * @param MessageCatalogue $catalog
194 protected function parseTokens($tokens, MessageCatalogue $catalog)
196 $tokenIterator = new \ArrayIterator($tokens);
198 for ($key = 0; $key < $tokenIterator->count(); ++$key) {
199 foreach ($this->sequences as $sequence) {
201 $domain = 'messages';
202 $tokenIterator->seek($key);
204 foreach ($sequence as $sequenceKey => $item) {
205 $this->seekToNextRelevantToken($tokenIterator);
207 if ($this->normalizeToken($tokenIterator->current()) === $item) {
208 $tokenIterator->next();
210 } elseif (self::MESSAGE_TOKEN === $item) {
211 $message = $this->getValue($tokenIterator);
213 if (\count($sequence) === ($sequenceKey + 1)) {
216 } elseif (self::METHOD_ARGUMENTS_TOKEN === $item) {
217 $this->skipMethodArgument($tokenIterator);
218 } elseif (self::DOMAIN_TOKEN === $item) {
219 $domain = $this->getValue($tokenIterator);
228 $catalog->set($message, $this->prefix.$message, $domain);
236 * @param string $file
240 * @throws \InvalidArgumentException
242 protected function canBeExtracted($file)
244 return $this->isFile($file) && 'php' === pathinfo($file, PATHINFO_EXTENSION);
248 * @param string|array $directory
252 protected function extractFromDirectory($directory)
254 $finder = new Finder();
256 return $finder->files()->name('*.php')->in($directory);