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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;
/**
* 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 $checkExtension ? self::getMimeTypeByExtension($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 every sub-directory and file to
* determine if it should be copied. The signature of the callback should be:
*
* ~~~
* // $path is the file/directory path to be copied
* function ($path) {
* // return a boolean indicating if $path should be copied
* }
* ~~~
*/
public static function copyDirectory($src, $dst, $options = array())
{
if (!is_dir($dst)) {
mkdir($dst, isset($options['dirMode']) ? $options['dirMode'] : 0777, true);
}
$handle = opendir($src);
while (($file = readdir($handle)) !== false) {
if ($file === '.' || $file === '..') {
continue;
}
$srcPath = $src . DIRECTORY_SEPARATOR . $file;
if (!isset($options['filter']) || call_user_func($options['filter'], $srcPath)) {
$dstPath = $dst . DIRECTORY_SEPARATOR . $file;
if (is_file($srcPath)) {
copy($srcPath, $dstPath);
if (isset($options['fileMode'])) {
chmod($dstPath, $options['fileMode']);
}
} else {
static::copyDirectory($srcPath, $dstPath, $options);
}
}
}
closedir($handle);
}
}