Olu Amey
453 lines
9.3 KiB
PHP
453 lines
9.3 KiB
PHP
<?php
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/**
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* This file is part of the CodeIgniter 4 framework.
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*
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* (c) CodeIgniter Foundation <admin@codeigniter.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 CodeIgniter\Autoloader;
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/**
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* Class FileLocator
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*
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* Allows loading non-class files in a namespaced manner.
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* Works with Helpers, Views, etc.
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*/
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class FileLocator
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{
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/**
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* The Autoloader to use.
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*
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* @var Autoloader
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*/
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protected $autoloader;
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/**
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* Constructor
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*
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* @param Autoloader $autoloader
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*/
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public function __construct(Autoloader $autoloader)
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{
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$this->autoloader = $autoloader;
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}
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/**
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* Attempts to locate a file by examining the name for a namespace
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* and looking through the PSR-4 namespaced files that we know about.
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*
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* @param string $file The namespaced file to locate
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* @param string|null $folder The folder within the namespace that we should look for the file.
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* @param string $ext The file extension the file should have.
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*
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* @return string|false The path to the file, or false if not found.
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*/
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public function locateFile(string $file, string $folder = null, string $ext = 'php')
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{
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$file = $this->ensureExt($file, $ext);
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// Clears the folder name if it is at the beginning of the filename
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if (! empty($folder) && strpos($file, $folder) === 0)
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{
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$file = substr($file, strlen($folder . '/'));
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}
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// Is not namespaced? Try the application folder.
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if (strpos($file, '\\') === false)
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{
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return $this->legacyLocate($file, $folder);
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}
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// Standardize slashes to handle nested directories.
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$file = strtr($file, '/', '\\');
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$segments = explode('\\', $file);
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// The first segment will be empty if a slash started the filename.
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if (empty($segments[0]))
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{
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unset($segments[0]);
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}
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$paths = [];
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$prefix = '';
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$filename = '';
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// Namespaces always comes with arrays of paths
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$namespaces = $this->autoloader->getNamespace();
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while (! empty($segments))
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{
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$prefix .= empty($prefix) ? array_shift($segments) : '\\' . array_shift($segments);
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if (empty($namespaces[$prefix]))
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{
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continue;
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}
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$paths = $namespaces[$prefix];
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$filename = implode('/', $segments);
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break;
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}
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// if no namespaces matched then quit
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if (empty($paths))
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{
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return false;
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}
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// Check each path in the namespace
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foreach ($paths as $path)
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{
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// Ensure trailing slash
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$path = rtrim($path, '/') . '/';
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// If we have a folder name, then the calling function
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// expects this file to be within that folder, like 'Views',
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// or 'libraries'.
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if (! empty($folder) && strpos($path . $filename, '/' . $folder . '/') === false)
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{
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$path .= trim($folder, '/') . '/';
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}
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$path .= $filename;
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if (is_file($path))
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{
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return $path;
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}
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}
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return false;
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}
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/**
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* Examines a file and returns the fully qualified domain name.
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*
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* @param string $file
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*
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* @return string
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*/
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public function getClassname(string $file) : string
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{
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$php = file_get_contents($file);
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$tokens = token_get_all($php);
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$dlm = false;
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$namespace = '';
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$className = '';
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foreach ($tokens as $i => $token)
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{
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if ($i < 2)
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{
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continue;
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}
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if ((isset($tokens[$i - 2][1]) && ($tokens[$i - 2][1] === 'phpnamespace' || $tokens[$i - 2][1] === 'namespace')) || ($dlm && $tokens[$i - 1][0] === T_NS_SEPARATOR && $token[0] === T_STRING))
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{
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if (! $dlm)
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{
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$namespace = 0;
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}
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if (isset($token[1]))
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{
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$namespace = $namespace ? $namespace . '\\' . $token[1] : $token[1];
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$dlm = true;
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}
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}
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elseif ($dlm && ($token[0] !== T_NS_SEPARATOR) && ($token[0] !== T_STRING))
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{
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$dlm = false;
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}
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if (($tokens[$i - 2][0] === T_CLASS || (isset($tokens[$i - 2][1]) && $tokens[$i - 2][1] === 'phpclass'))
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&& $tokens[$i - 1][0] === T_WHITESPACE
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&& $token[0] === T_STRING)
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{
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$className = $token[1];
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break;
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}
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}
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if (empty($className))
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{
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return '';
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}
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return $namespace . '\\' . $className;
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}
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/**
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* Searches through all of the defined namespaces looking for a file.
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* Returns an array of all found locations for the defined file.
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*
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* Example:
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*
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* $locator->search('Config/Routes.php');
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* // Assuming PSR4 namespaces include foo and bar, might return:
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* [
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* 'app/Modules/foo/Config/Routes.php',
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* 'app/Modules/bar/Config/Routes.php',
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* ]
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*
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* @param string $path
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* @param string $ext
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* @param boolean $prioritizeApp
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*
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* @return array
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*/
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public function search(string $path, string $ext = 'php', bool $prioritizeApp = true): array
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{
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$path = $this->ensureExt($path, $ext);
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$foundPaths = [];
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$appPaths = [];
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foreach ($this->getNamespaces() as $namespace)
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{
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if (isset($namespace['path']) && is_file($namespace['path'] . $path))
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{
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$fullPath = $namespace['path'] . $path;
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$fullPath = realpath($fullPath) ?: $fullPath;
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if ($prioritizeApp)
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{
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$foundPaths[] = $fullPath;
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}
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elseif (strpos($fullPath, APPPATH) === 0)
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{
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$appPaths[] = $fullPath;
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}
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else
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{
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$foundPaths[] = $fullPath;
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}
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}
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}
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if (! $prioritizeApp && ! empty($appPaths))
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{
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$foundPaths = array_merge($foundPaths, $appPaths);
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}
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// Remove any duplicates
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$foundPaths = array_unique($foundPaths);
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return $foundPaths;
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}
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/**
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* Ensures a extension is at the end of a filename
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*
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* @param string $path
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* @param string $ext
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*
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* @return string
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*/
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protected function ensureExt(string $path, string $ext): string
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{
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if ($ext)
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{
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$ext = '.' . $ext;
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if (substr($path, -strlen($ext)) !== $ext)
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{
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$path .= $ext;
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}
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}
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return $path;
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}
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/**
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* Return the namespace mappings we know about.
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*
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* @return array|string
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*/
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protected function getNamespaces()
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{
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$namespaces = [];
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// Save system for last
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$system = [];
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foreach ($this->autoloader->getNamespace() as $prefix => $paths)
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{
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foreach ($paths as $path)
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{
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if ($prefix === 'CodeIgniter')
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{
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$system = [
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'prefix' => $prefix,
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'path' => rtrim($path, '\\/') . DIRECTORY_SEPARATOR,
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];
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continue;
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}
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$namespaces[] = [
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'prefix' => $prefix,
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'path' => rtrim($path, '\\/') . DIRECTORY_SEPARATOR,
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];
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}
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}
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$namespaces[] = $system;
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return $namespaces;
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}
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/**
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* Find the qualified name of a file according to
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* the namespace of the first matched namespace path.
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*
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* @param string $path
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*
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* @return string|false The qualified name or false if the path is not found
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*/
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public function findQualifiedNameFromPath(string $path)
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{
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$path = realpath($path) ?: $path;
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if (! is_file($path))
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{
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return false;
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}
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foreach ($this->getNamespaces() as $namespace)
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{
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$namespace['path'] = realpath($namespace['path']) ?: $namespace['path'];
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if (empty($namespace['path']))
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{
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continue;
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}
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if (mb_strpos($path, $namespace['path']) === 0)
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{
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$className = '\\' . $namespace['prefix'] . '\\' .
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ltrim(str_replace('/', '\\', mb_substr(
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$path, mb_strlen($namespace['path']))
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), '\\');
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// Remove the file extension (.php)
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$className = mb_substr($className, 0, -4);
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// Check if this exists
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if (class_exists($className))
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{
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return $className;
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}
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}
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}
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return false;
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}
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/**
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* Scans the defined namespaces, returning a list of all files
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* that are contained within the subpath specified by $path.
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*
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* @param string $path
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*
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* @return array
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*/
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public function listFiles(string $path): array
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{
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if (empty($path))
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{
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return [];
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}
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$files = [];
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helper('filesystem');
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foreach ($this->getNamespaces() as $namespace)
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{
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$fullPath = $namespace['path'] . $path;
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$fullPath = realpath($fullPath) ?: $fullPath;
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if (! is_dir($fullPath))
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{
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continue;
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}
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$tempFiles = get_filenames($fullPath, true);
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if (! empty($tempFiles))
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{
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$files = array_merge($files, $tempFiles);
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}
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}
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return $files;
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}
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/**
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* Scans the provided namespace, returning a list of all files
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* that are contained within the subpath specified by $path.
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*
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* @param string $prefix
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* @param string $path
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*
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* @return array
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*/
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public function listNamespaceFiles(string $prefix, string $path): array
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{
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if (empty($path) || empty($prefix))
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{
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return [];
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}
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$files = [];
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helper('filesystem');
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// autoloader->getNamespace($prefix) returns an array of paths for that namespace
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foreach ($this->autoloader->getNamespace($prefix) as $namespacePath)
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{
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$fullPath = rtrim($namespacePath, '/') . '/' . $path;
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$fullPath = realpath($fullPath) ?: $fullPath;
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if (! is_dir($fullPath))
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{
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continue;
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}
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$tempFiles = get_filenames($fullPath, true);
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if (! empty($tempFiles))
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{
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$files = array_merge($files, $tempFiles);
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}
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}
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return $files;
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}
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/**
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* Checks the app folder to see if the file can be found.
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* Only for use with filenames that DO NOT include namespacing.
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*
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* @param string $file
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* @param string|null $folder
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*
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* @return string|false The path to the file, or false if not found.
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*/
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protected function legacyLocate(string $file, string $folder = null)
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{
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$path = APPPATH . (empty($folder) ? $file : $folder . '/' . $file);
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$path = realpath($path) ?: $path;
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if (is_file($path))
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{
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return $path;
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}
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return false;
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}
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}
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