<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014-2019 British Columbia Institute of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author CodeIgniter Dev Team
* @copyright 2014-2019 British Columbia Institute of Technology (https://bcit.ca/)
* @license https://opensource.org/licenses/MIT MIT License
* @link https://codeigniter.com
* @since Version 4.0.0
* @filesource
*/
namespace CodeIgniter\Autoloader;
/**
* Class FileLocator
*
* Allows loading non-class files in a namespaced manner.
* Works with Helpers, Views, etc.
*
* @package CodeIgniter
*/
class FileLocator
{
/**
* The Autoloader to use.
*
* @var \CodeIgniter\Autoloader\Autoloader
*/
protected $autoloader;
//--------------------------------------------------------------------
/**
* Constructor
*
* @param Autoloader $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 $folder The folder within the namespace that we should look for the file.
* @param string $ext The file extension the file should have.
*
* @return string|false 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) && ($pos = strpos($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.
*
* @param string $file
*
* @return string
*/
public function getClassname(string $file) : string
{
$php = file_get_contents($file);
$tokens = token_get_all($php);
$count = count($tokens);
$dlm = false;
$namespace = '';
$class_name = '';
for ($i = 2; $i < $count; $i++)
{
if ((isset($tokens[$i - 2][1]) && ($tokens[$i - 2][1] === 'phpnamespace' || $tokens[$i - 2][1] === 'namespace')) || ($dlm && $tokens[$i - 1][0] === T_NS_SEPARATOR && $tokens[$i][0] === T_STRING))
{
if (! $dlm)
{
$namespace = 0;
}
if (isset($tokens[$i][1]))
{
$namespace = $namespace ? $namespace . '\\' . $tokens[$i][1] : $tokens[$i][1];
$dlm = true;
}
}
elseif ($dlm && ($tokens[$i][0] !== T_NS_SEPARATOR) && ($tokens[$i][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
&& $tokens[$i][0] === T_STRING)
{
$class_name = $tokens[$i][1];
break;
}
}
if (empty( $class_name ))
{
return '';
}
return $namespace . '\\' . $class_name;
}
//--------------------------------------------------------------------
/**
* 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',
* ]
*
* @param string $path
* @param string $ext
*
* @return array
*/
public function search(string $path, string $ext = 'php'): array
{
$path = $this->ensureExt($path, $ext);
$foundPaths = [];
foreach ($this->getNamespaces() as $namespace)
{
if (is_file($namespace['path'] . $path))
{
$foundPaths[] = $namespace['path'] . $path;
}
}
// Remove any duplicates
$foundPaths = array_unique($foundPaths);
return $foundPaths;
}
//--------------------------------------------------------------------
/**
* Ensures a extension is at the end of a filename
*
* @param string $path
* @param string $ext
*
* @return string
*/
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()
{
$namespaces = [];
foreach ($this->autoloader->getNamespace() as $prefix => $paths)
{
foreach ($paths as $path)
{
$namespaces[] = [
'prefix' => $prefix,
'path' => rtrim($path, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR,
];
}
}
return $namespaces;
}
//--------------------------------------------------------------------
/**
* Find the qualified name of a file according to
* the namespace of the first matched namespace path.
*
* @param string $path
*
* @return string|false The qualified name or false if the path is not found
*/
public function findQualifiedNameFromPath(string $path)
{
$path = realpath($path);
if (! $path)
{
return false;
}
foreach ($this->getNamespaces() as $namespace)
{
$namespace['path'] = realpath($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);
return $className;
}
}
return false;
}
//--------------------------------------------------------------------
/**
* Scans the defined namespaces, returning a list of all files
* that are contained within the subpath specified by $path.
*
* @param string $path
*
* @return array
*/
public function listFiles(string $path): array
{
if (empty($path))
{
return [];
}
$files = [];
helper('filesystem');
foreach ($this->getNamespaces() as $namespace)
{
$fullPath = realpath($namespace['path'] . $path);
if (! is_dir($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.
*
* @param string $prefix
* @param string $path
*
* @return array
*/
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)
{
$fullPath = realpath(rtrim($namespacePath, '/') . '/' . $path);
if (! is_dir($fullPath))
{
continue;
}
$tempFiles = get_filenames($fullPath, true);
if (! empty($tempFiles))
{
$files = array_merge($files, $tempFiles);
}
}
return $files;
}
//--------------------------------------------------------------------
/**
* Checks the application folder to see if the file can be found.
* Only for use with filenames that DO NOT include namespacing.
*
* @param string $file
* @param string|null $folder
*
* @return string|false The path to the file, or false if not found.
*/
protected function legacyLocate(string $file, string $folder = null)
{
$paths = [
APPPATH,
SYSTEMPATH,
];
foreach ($paths as $path)
{
$path .= empty($folder) ? $file : $folder . '/' . $file;
if (is_file($path))
{
return $path;
}
}
return false;
}
}
Jim Parry