Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Debug\FatalErrorHandler;
Chris@0: 
Chris@17: use Composer\Autoload\ClassLoader as ComposerClassLoader;
Chris@17: use Symfony\Component\ClassLoader\ClassLoader as SymfonyClassLoader;
Chris@17: use Symfony\Component\Debug\DebugClassLoader;
Chris@0: use Symfony\Component\Debug\Exception\ClassNotFoundException;
Chris@0: use Symfony\Component\Debug\Exception\FatalErrorException;
Chris@0: 
Chris@0: /**
Chris@0:  * ErrorHandler for classes that do not exist.
Chris@0:  *
Chris@0:  * @author Fabien Potencier <fabien@symfony.com>
Chris@0:  */
Chris@0: class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
Chris@0: {
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function handleError(array $error, FatalErrorException $exception)
Chris@0:     {
Chris@17:         $messageLen = \strlen($error['message']);
Chris@0:         $notFoundSuffix = '\' not found';
Chris@17:         $notFoundSuffixLen = \strlen($notFoundSuffix);
Chris@0:         if ($notFoundSuffixLen > $messageLen) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         if (0 !== substr_compare($error['message'], $notFoundSuffix, -$notFoundSuffixLen)) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@17:         foreach (['class', 'interface', 'trait'] as $typeName) {
Chris@0:             $prefix = ucfirst($typeName).' \'';
Chris@17:             $prefixLen = \strlen($prefix);
Chris@0:             if (0 !== strpos($error['message'], $prefix)) {
Chris@0:                 continue;
Chris@0:             }
Chris@0: 
Chris@0:             $fullyQualifiedClassName = substr($error['message'], $prefixLen, -$notFoundSuffixLen);
Chris@0:             if (false !== $namespaceSeparatorIndex = strrpos($fullyQualifiedClassName, '\\')) {
Chris@0:                 $className = substr($fullyQualifiedClassName, $namespaceSeparatorIndex + 1);
Chris@0:                 $namespacePrefix = substr($fullyQualifiedClassName, 0, $namespaceSeparatorIndex);
Chris@0:                 $message = sprintf('Attempted to load %s "%s" from namespace "%s".', $typeName, $className, $namespacePrefix);
Chris@0:                 $tail = ' for another namespace?';
Chris@0:             } else {
Chris@0:                 $className = $fullyQualifiedClassName;
Chris@0:                 $message = sprintf('Attempted to load %s "%s" from the global namespace.', $typeName, $className);
Chris@0:                 $tail = '?';
Chris@0:             }
Chris@0: 
Chris@0:             if ($candidates = $this->getClassCandidates($className)) {
Chris@0:                 $tail = array_pop($candidates).'"?';
Chris@0:                 if ($candidates) {
Chris@0:                     $tail = ' for e.g. "'.implode('", "', $candidates).'" or "'.$tail;
Chris@0:                 } else {
Chris@0:                     $tail = ' for "'.$tail;
Chris@0:                 }
Chris@0:             }
Chris@0:             $message .= "\nDid you forget a \"use\" statement".$tail;
Chris@0: 
Chris@0:             return new ClassNotFoundException($message, $exception);
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Tries to guess the full namespace for a given class name.
Chris@0:      *
Chris@0:      * By default, it looks for PSR-0 and PSR-4 classes registered via a Symfony or a Composer
Chris@0:      * autoloader (that should cover all common cases).
Chris@0:      *
Chris@0:      * @param string $class A class name (without its namespace)
Chris@0:      *
Chris@0:      * @return array An array of possible fully qualified class names
Chris@0:      */
Chris@0:     private function getClassCandidates($class)
Chris@0:     {
Chris@17:         if (!\is_array($functions = spl_autoload_functions())) {
Chris@17:             return [];
Chris@0:         }
Chris@0: 
Chris@0:         // find Symfony and Composer autoloaders
Chris@17:         $classes = [];
Chris@0: 
Chris@0:         foreach ($functions as $function) {
Chris@17:             if (!\is_array($function)) {
Chris@0:                 continue;
Chris@0:             }
Chris@0:             // get class loaders wrapped by DebugClassLoader
Chris@0:             if ($function[0] instanceof DebugClassLoader) {
Chris@0:                 $function = $function[0]->getClassLoader();
Chris@0: 
Chris@17:                 if (!\is_array($function)) {
Chris@0:                     continue;
Chris@0:                 }
Chris@0:             }
Chris@0: 
Chris@0:             if ($function[0] instanceof ComposerClassLoader || $function[0] instanceof SymfonyClassLoader) {
Chris@0:                 foreach ($function[0]->getPrefixes() as $prefix => $paths) {
Chris@0:                     foreach ($paths as $path) {
Chris@0:                         $classes = array_merge($classes, $this->findClassInPath($path, $class, $prefix));
Chris@0:                     }
Chris@0:                 }
Chris@0:             }
Chris@0:             if ($function[0] instanceof ComposerClassLoader) {
Chris@0:                 foreach ($function[0]->getPrefixesPsr4() as $prefix => $paths) {
Chris@0:                     foreach ($paths as $path) {
Chris@0:                         $classes = array_merge($classes, $this->findClassInPath($path, $class, $prefix));
Chris@0:                     }
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return array_unique($classes);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @param string $path
Chris@0:      * @param string $class
Chris@0:      * @param string $prefix
Chris@0:      *
Chris@0:      * @return array
Chris@0:      */
Chris@0:     private function findClassInPath($path, $class, $prefix)
Chris@0:     {
Chris@17:         if (!$path = realpath($path.'/'.strtr($prefix, '\\_', '//')) ?: realpath($path.'/'.\dirname(strtr($prefix, '\\_', '//'))) ?: realpath($path)) {
Chris@17:             return [];
Chris@0:         }
Chris@0: 
Chris@17:         $classes = [];
Chris@0:         $filename = $class.'.php';
Chris@0:         foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path, \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
Chris@0:             if ($filename == $file->getFileName() && $class = $this->convertFileToClass($path, $file->getPathName(), $prefix)) {
Chris@0:                 $classes[] = $class;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return $classes;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @param string $path
Chris@0:      * @param string $file
Chris@0:      * @param string $prefix
Chris@0:      *
Chris@0:      * @return string|null
Chris@0:      */
Chris@0:     private function convertFileToClass($path, $file, $prefix)
Chris@0:     {
Chris@17:         $candidates = [
Chris@0:             // namespaced class
Chris@17:             $namespacedClass = str_replace([$path.\DIRECTORY_SEPARATOR, '.php', '/'], ['', '', '\\'], $file),
Chris@0:             // namespaced class (with target dir)
Chris@0:             $prefix.$namespacedClass,
Chris@0:             // namespaced class (with target dir and separator)
Chris@0:             $prefix.'\\'.$namespacedClass,
Chris@0:             // PEAR class
Chris@0:             str_replace('\\', '_', $namespacedClass),
Chris@0:             // PEAR class (with target dir)
Chris@0:             str_replace('\\', '_', $prefix.$namespacedClass),
Chris@0:             // PEAR class (with target dir and separator)
Chris@0:             str_replace('\\', '_', $prefix.'\\'.$namespacedClass),
Chris@17:         ];
Chris@0: 
Chris@0:         if ($prefix) {
Chris@0:             $candidates = array_filter($candidates, function ($candidate) use ($prefix) { return 0 === strpos($candidate, $prefix); });
Chris@0:         }
Chris@0: 
Chris@0:         // We cannot use the autoloader here as most of them use require; but if the class
Chris@0:         // is not found, the new autoloader call will require the file again leading to a
Chris@0:         // "cannot redeclare class" error.
Chris@0:         foreach ($candidates as $candidate) {
Chris@0:             if ($this->classExists($candidate)) {
Chris@0:                 return $candidate;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         require_once $file;
Chris@0: 
Chris@0:         foreach ($candidates as $candidate) {
Chris@0:             if ($this->classExists($candidate)) {
Chris@0:                 return $candidate;
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * @param string $class
Chris@0:      *
Chris@0:      * @return bool
Chris@0:      */
Chris@0:     private function classExists($class)
Chris@0:     {
Chris@0:         return class_exists($class, false) || interface_exists($class, false) || trait_exists($class, false);
Chris@0:     }
Chris@0: }