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<?php
/**
* Filesystem helper class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\helpers\base;
use Yii;
use yii\helpers\StringHelper as StringHelper2;
/**
* Filesystem helper
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @author Alex Makarov <sam@rmcreative.ru>
* @since 2.0
*/
class FileHelper
{
/**
* Normalizes a file/directory path.
* After normalization, the directory separators in the path will be `DIRECTORY_SEPARATOR`,
* and any trailing directory separators will be removed. For example, '/home\demo/' on Linux
* will be normalized as '/home/demo'.
* @param string $path the file/directory path to be normalized
* @param string $ds the directory separator to be used in the normalized result. Defaults to `DIRECTORY_SEPARATOR`.
* @return string the normalized file/directory path
*/
public static function normalizePath($path, $ds = DIRECTORY_SEPARATOR)
{
return rtrim(strtr($path, array('/' => $ds, '\\' => $ds)), $ds);
}
/**
* Returns the localized version of a specified file.
*
* The searching is based on the specified language code. In particular,
* a file with the same name will be looked for under the subdirectory
* whose name is the same as the language code. For example, given the file "path/to/view.php"
* and language code "zh_CN", the localized file will be looked for as
* "path/to/zh_CN/view.php". If the file is not found, the original file
* will be returned.
*
* If the target and the source language codes are the same,
* the original file will be returned.
*
* @param string $file the original file
* @param string $language the target language that the file should be localized to.
* If not set, the value of [[\yii\base\Application::language]] will be used.
* @param string $sourceLanguage the language that the original file is in.
* If not set, the value of [[\yii\base\Application::sourceLanguage]] will be used.
* @return string the matching localized file, or the original file if the localized version is not found.
* If the target and the source language codes are the same, the original file will be returned.
*/
public static function localize($file, $language = null, $sourceLanguage = null)
{
if ($language === null) {
$language = Yii::$app->language;
}
if ($sourceLanguage === null) {
$sourceLanguage = Yii::$app->sourceLanguage;
}
if ($language === $sourceLanguage) {
return $file;
}
$desiredFile = dirname($file) . DIRECTORY_SEPARATOR . $sourceLanguage . DIRECTORY_SEPARATOR . basename($file);
return is_file($desiredFile) ? $desiredFile : $file;
}
/**
* Determines the MIME type of the specified file.
* This method will first try to determine the MIME type based on
* [finfo_open](http://php.net/manual/en/function.finfo-open.php). If this doesn't work, it will
* fall back to [[getMimeTypeByExtension()]].
* @param string $file the file name.
* @param string $magicFile name of the optional magic database file, usually something like `/path/to/magic.mime`.
* This will be passed as the second parameter to [finfo_open](http://php.net/manual/en/function.finfo-open.php).
* @param boolean $checkExtension whether to use the file extension to determine the MIME type in case
* `finfo_open()` cannot determine it.
* @return string the MIME type (e.g. `text/plain`). Null is returned if the MIME type cannot be determined.
*/
public static function getMimeType($file, $magicFile = null, $checkExtension = true)
{
if (function_exists('finfo_open')) {
$info = finfo_open(FILEINFO_MIME_TYPE, $magicFile);
if ($info) {
$result = finfo_file($info, $file);
finfo_close($info);
if ($result !== false) {
return $result;
}
}
}
return $checkExtension ? static::getMimeTypeByExtension($file) : null;
}
/**
* Determines the MIME type based on the extension name of the specified file.
* This method will use a local map between extension names and MIME types.
* @param string $file the file name.
* @param string $magicFile the path of the file that contains all available MIME type information.
* If this is not set, the default file aliased by `@yii/util/mimeTypes.php` will be used.
* @return string the MIME type. Null is returned if the MIME type cannot be determined.
*/
public static function getMimeTypeByExtension($file, $magicFile = null)
{
static $mimeTypes = array();
if ($magicFile === null) {
$magicFile = __DIR__ . '/mimeTypes.php';
}
if (!isset($mimeTypes[$magicFile])) {
$mimeTypes[$magicFile] = require($magicFile);
}
if (($ext = pathinfo($file, PATHINFO_EXTENSION)) !== '') {
$ext = strtolower($ext);
if (isset($mimeTypes[$magicFile][$ext])) {
return $mimeTypes[$magicFile][$ext];
}
}
return null;
}
/**
* Copies a whole directory as another one.
* The files and sub-directories will also be copied over.
* @param string $src the source directory
* @param string $dst the destination directory
* @param array $options options for directory copy. Valid options are:
*
* - dirMode: integer, the permission to be set for newly copied directories. Defaults to 0777.
* - fileMode: integer, the permission to be set for newly copied files. Defaults to the current environment setting.
* - filter: callback, a PHP callback that is called for each sub-directory or file.
* If the callback returns false, then the sub-directory or file will not be copied.
* The signature of the callback should be: `function ($path)`, where `$path` refers the full path to be copied.
* - only: array, list of patterns that the files or directories should match if they want to be copied.
* A path matches a pattern if it contains the pattern string at its end.
* Patterns ending with '/' apply to directory paths only, and patterns not ending with '/'
* apply to file paths only. For example, '/a/b' matches all file paths ending with '/a/b';
* and '.svn/' matches directory paths ending with '.svn'. Note, the '/' characters in a pattern matches
* both '/' and '\' in the paths. If a file/directory matches a pattern in both in "only" and "except", it will NOT be returned.
* - except: array, list of patterns that the files or directories should NOT match if they want to be copied.
* For more details on how to specify the patterns, please refer to the "only" option.
* - recursive: boolean, whether the files under the subdirectories should also be copied. Defaults to true.
* - afterCopy: callback, a PHP callback that is called after each sub-directory or file is successfully copied.
* The signature of the callback should be: `function ($from, $to)`, where `$from` is the sub-directory or
* file copied from, while `$to` is the copy target.
*/
public static function copyDirectory($src, $dst, $options = array())
{
if (!is_dir($dst)) {
static::mkdir($dst, isset($options['dirMode']) ? $options['dirMode'] : 0777, true);
}
$handle = opendir($src);
while (($file = readdir($handle)) !== false) {
if ($file === '.' || $file === '..') {
continue;
}
$from = $src . DIRECTORY_SEPARATOR . $file;
$to = $dst . DIRECTORY_SEPARATOR . $file;
if (static::filterPath($from, $options)) {
if (is_file($from)) {
copy($from, $to);
if (isset($options['fileMode'])) {
@chmod($to, $options['fileMode']);
}
} else {
static::copyDirectory($from, $to, $options);
}
if (isset($options['afterCopy'])) {
call_user_func($options['afterCopy'], $from, $to);
}
}
}
closedir($handle);
}
/**
* Removes a directory (and all its content) recursively.
* @param string $dir the directory to be deleted recursively.
*/
public static function removeDirectory($dir)
{
if (!is_dir($dir) || !($handle = opendir($dir))) {
return;
}
while (($file = readdir($handle)) !== false) {
if ($file === '.' || $file === '..') {
continue;
}
$path = $dir . DIRECTORY_SEPARATOR . $file;
if (is_file($path)) {
unlink($path);
} else {
static::removeDirectory($path);
}
}
closedir($handle);
rmdir($dir);
}
/**
* Returns the files found under the specified directory and subdirectories.
* @param string $dir the directory under which the files will be looked for.
* @param array $options options for file searching. Valid options are:
*
* - filter: callback, a PHP callback that is called for each sub-directory or file.
* If the callback returns false, then the sub-directory or file will be excluded from the returning result.
* The signature of the callback should be: `function ($path)`, where `$path` refers the full path to be filtered.
* - only: array, list of patterns that the files or directories should match if they want to be returned.
* A path matches a pattern if it contains the pattern string at its end.
* Patterns ending with '/' apply to directory paths only, and patterns not ending with '/'
* apply to file paths only. For example, '/a/b' matches all file paths ending with '/a/b';
* and '.svn/' matches directory paths ending with '.svn'. Note, the '/' characters in a pattern matches
* both '/' and '\' in the paths. If a file/directory matches a pattern in both in "only" and "except", it will NOT be returned.
* - except: array, list of patterns that the files or directories should NOT match if they want to be returned.
* For more details on how to specify the patterns, please refer to the "only" option.
* - recursive: boolean, whether the files under the subdirectories should also be looked for. Defaults to true.
* @return array files found under the directory. The file list is sorted.
*/
public static function findFiles($dir, $options = array())
{
$list = array();
$handle = opendir($dir);
while (($file = readdir($handle)) !== false) {
if ($file === '.' || $file === '..') {
continue;
}
$path = $dir . DIRECTORY_SEPARATOR . $file;
if (static::filterPath($path, $options)) {
if (is_file($path)) {
$list[] = $path;
} elseif (!isset($options['recursive']) || $options['recursive']) {
$list = array_merge($list, static::findFiles($path, $options));
}
}
}
closedir($handle);
return $list;
}
/**
* Checks if the given file path satisfies the filtering options.
* @param string $path the path of the file or directory to be checked
* @param array $options the filtering options. See [[findFiles()]] for explanations of
* the supported options.
* @return boolean whether the file or directory satisfies the filtering options.
*/
public static function filterPath($path, $options)
{
if (isset($options['filter']) && !call_user_func($options['filter'], $path)) {
return false;
}
$path = str_replace('\\', '/', $path);
if (is_dir($path)) {
$path .= '/';
}
$n = StringHelper2::strlen($path);
if (!empty($options['except'])) {
foreach ($options['except'] as $name) {
if (StringHelper2::substr($path, -StringHelper2::strlen($name), $n) === $name) {
return false;
}
}
}
if (!empty($options['only'])) {
foreach ($options['only'] as $name) {
if (StringHelper2::substr($path, -StringHelper2::strlen($name), $n) !== $name) {
return false;
}
}
}
return true;
}
/**
* Makes directory.
*
* This method is similar to the PHP `mkdir()` function except that
* it uses `chmod()` to set the permission of the created directory
* in order to avoid the impact of the `umask` setting.
*
* @param string $path path to be created.
* @param integer $mode the permission to be set for created directory.
* @param boolean $recursive whether to create parent directories if they do not exist.
* @return boolean whether the directory is created successfully
*/
public static function mkdir($path, $mode = 0777, $recursive = true)
{
if (is_dir($path)) {
return true;
}
$parentDir = dirname($path);
if ($recursive && !is_dir($parentDir)) {
static::mkdir($parentDir, $mode, true);
}
$result = mkdir($path, $mode);
chmod($path, $mode);
return $result;
}
}