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