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Completed
Pull Request — master (#615)
by Asmir
05:17
created

CacheWarmer::isOptional()   A

Complexity

Conditions 1
Paths 1

Size

Total Lines 4
Code Lines 2

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 4
rs 10
c 0
b 0
f 0
cc 1
eloc 2
nc 1
nop 0
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<?php
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/*
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 * Copyright 2011 Johannes M. Schmitt <[email protected]>
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 * http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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namespace JMS\SerializerBundle\Cache;
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use Metadata\MetadataFactoryInterface;
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use Symfony\Component\Finder\Finder;
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use Symfony\Component\HttpKernel\CacheWarmer\CacheWarmerInterface;
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/**
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 * @author Asmir Mustafic <[email protected]>
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 */
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class CacheWarmer implements CacheWarmerInterface
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{
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    /**
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     * @var MetadataFactoryInterface
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     */
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    private $metadataFactory;
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    /**
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     * @var string[]
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     */
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    private $includePaths = array();
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    /**
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     * @var string[]
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     */
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    private $excludePaths = array();
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    public function __construct(array $includePaths, MetadataFactoryInterface $metadataFactory, array $excludePaths = array())
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    {
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        $this->metadataFactory = $metadataFactory;
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        $this->includePaths = $includePaths;
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        $this->excludePaths = $excludePaths;
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    }
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    public function warmUp($cacheDir)
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    {
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        $finder = Finder::create()
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            ->ignoreVCS(true)
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            ->ignoreDotFiles(true)
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            ->ignoreUnreadableDirs(true)
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            ->in($this->includePaths)
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            ->exclude($this->excludePaths)
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            ->name('*.php');
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        foreach ($finder as $file) {
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            $classes = self::findClasses($file->getPathname());
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            foreach ($classes as $class) {
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                $this->metadataFactory->getMetadataForClass($class);
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            }
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        }
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    }
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    public function isOptional()
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    {
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        return true;
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    }
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    /**
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     * Extract the classes in the given file.
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     *
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     * This has been copied from https://github.com/composer/composer/blob/bfed974ae969635e622c4844e5e69526d8459baf/src/Composer/Autoload/ClassMapGenerator.php#L120-L214
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     *
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     * @param  string $path The file to check
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     * @throws \RuntimeException
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     * @return array             The found classes
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     */
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    private static function findClasses($path)
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    {
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        $extraTypes = PHP_VERSION_ID < 50400 ? '' : '|trait';
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        if (defined('HHVM_VERSION') && version_compare(HHVM_VERSION, '3.3', '>=')) {
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            $extraTypes .= '|enum';
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        }
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        // Use @ here instead of Silencer to actively suppress 'unhelpful' output
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        // @link https://github.com/composer/composer/pull/4886
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        $contents = @php_strip_whitespace($path);
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        if (!$contents) {
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            if (!file_exists($path)) {
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                $message = 'File at "%s" does not exist, check your classmap definitions';
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            } elseif (!is_readable($path)) {
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                $message = 'File at "%s" is not readable, check its permissions';
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            } elseif ('' === trim(file_get_contents($path))) {
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                // The input file was really empty and thus contains no classes
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                return array();
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            } else {
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                $message = 'File at "%s" could not be parsed as PHP, it may be binary or corrupted';
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            }
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            $error = error_get_last();
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            if (isset($error['message'])) {
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                $message .= PHP_EOL . 'The following message may be helpful:' . PHP_EOL . $error['message'];
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            }
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            throw new \RuntimeException(sprintf($message, $path));
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        }
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        // return early if there is no chance of matching anything in this file
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        if (!preg_match('{\b(?:class|interface' . $extraTypes . ')\s}i', $contents)) {
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            return array();
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        }
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        // strip heredocs/nowdocs
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        $contents = preg_replace('{<<<\s*(\'?)(\w+)\\1(?:\r\n|\n|\r)(?:.*?)(?:\r\n|\n|\r)\\2(?=\r\n|\n|\r|;)}s', 'null', $contents);
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        // strip strings
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        $contents = preg_replace('{"[^"\\\\]*+(\\\\.[^"\\\\]*+)*+"|\'[^\'\\\\]*+(\\\\.[^\'\\\\]*+)*+\'}s', 'null', $contents);
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        // strip leading non-php code if needed
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        if (substr($contents, 0, 2) !== '<?') {
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            $contents = preg_replace('{^.+?<\?}s', '<?', $contents, 1, $replacements);
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            if ($replacements === 0) {
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                return array();
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            }
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        }
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        // strip non-php blocks in the file
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        $contents = preg_replace('{\?>.+<\?}s', '?><?', $contents);
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        // strip trailing non-php code if needed
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        $pos = strrpos($contents, '?>');
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        if (false !== $pos && false === strpos(substr($contents, $pos), '<?')) {
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            $contents = substr($contents, 0, $pos);
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        }
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        preg_match_all('{
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            (?:
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                 \b(?<![\$:>])(?P<type>class|interface' . $extraTypes . ') \s++ (?P<name>[a-zA-Z_\x7f-\xff:][a-zA-Z0-9_\x7f-\xff:\-]*+)
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               | \b(?<![\$:>])(?P<ns>namespace) (?P<nsname>\s++[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\s*+\\\\\s*+[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+)*+)? \s*+ [\{;]
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            )
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        }ix', $contents, $matches);
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        $classes = array();
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        $namespace = '';
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        for ($i = 0, $len = count($matches['type']); $i < $len; $i++) {
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            if (!empty($matches['ns'][$i])) {
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                $namespace = str_replace(array(' ', "\t", "\r", "\n"), '', $matches['nsname'][$i]) . '\\';
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            } else {
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                $name = $matches['name'][$i];
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                // skip anon classes extending/implementing
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                if ($name === 'extends' || $name === 'implements') {
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                    continue;
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                }
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                if ($name[0] === ':') {
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                    // This is an XHP class, https://github.com/facebook/xhp
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                    $name = 'xhp' . substr(str_replace(array('-', ':'), array('_', '__'), $name), 1);
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                } elseif ($matches['type'][$i] === 'enum') {
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                    // In Hack, something like:
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                    //   enum Foo: int { HERP = '123'; }
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                    // The regex above captures the colon, which isn't part of
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                    // the class name.
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                    $name = rtrim($name, ':');
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                }
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                $classes[] = ltrim($namespace . $name, '\\');
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            }
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        }
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        return $classes;
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    }
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}
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