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<?php
/**
* Filesystem helper class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
*/
namespace yii\util;
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use yii\base\Exception;
use yii\base\InvalidConfigException;
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/**
* Filesystem helper
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @author Alex Makarov <sam@rmcreative.ru>
* @since 2.0
*/
class FileHelper
{
/**
* Returns the extension name of a file path.
* For example, the path "path/to/something.php" would return "php".
* @param string $path the file path
* @return string the extension name without the dot character.
*/
public static function getExtension($path)
{
return pathinfo($path, PATHINFO_EXTENSION);
}
/**
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* Checks the given path and ensures it is a directory.
* This method will call `realpath()` to "normalize" the given path.
* If the given path does not refer to an existing directory, an exception will be thrown.
* @param string $path the given path. This can also be a path alias.
* @return string the normalized path
* @throws InvalidConfigException if the path does not refer to an existing directory.
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*/
public static function ensureDirectory($path)
{
$p = \Yii::getAlias($path);
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if (($p = realpath($p)) !== false && is_dir($p)) {
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return $p;
} else {
throw new InvalidConfigException('Directory does not exist: ' . $path);
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}
}
/**
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* 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);
}
/**
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* 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 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.
*
* For consistency, it is recommended that the language code is given
* in lower case and in the format of LanguageID_RegionID (e.g. "en_us").
*
* @param string $file the original file
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* @param string $language the target language that the file should be localized to.
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* If not set, the value of [[\yii\base\Application::language]] will be used.
* @param string $sourceLanguage the language that the original file is in.
* If not set, the value of [[\yii\base\Application::sourceLanguage]] will be used.
* @return string the matching localized file, or the original file if the localized version is not found.
* If the target and the source language codes are the same, the original file will be returned.
*/
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public static function localize($file, $language = null, $sourceLanguage = null)
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{
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if ($language === null) {
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$language = \Yii::$app->language;
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}
if ($sourceLanguage === null) {
$sourceLanguage = \Yii::$app->sourceLanguage;
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}
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if ($language === $sourceLanguage) {
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return $file;
}
$desiredFile = dirname($file) . DIRECTORY_SEPARATOR . $sourceLanguage . DIRECTORY_SEPARATOR . basename($file);
return is_file($desiredFile) ? $desiredFile : $file;
}
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/**
* 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)) !== 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, $magicFile = null)
{
if ($magicFile === null) {
$magicFile = \Yii::getAlias('@yii/util/mimeTypes.php');
}
$mimeTypes = require($magicFile);
if (($ext = pathinfo($file, PATHINFO_EXTENSION)) !== '') {
$ext = strtolower($ext);
if (isset($mimeTypes[$ext])) {
return $mimeTypes[$ext];
}
}
return null;
}
/**
* Copies a list of files from one place to another.
* @param array $fileList the list of files to be copied (name=>spec).
* The array keys are names displayed during the copy process, and array values are specifications
* for files to be copied. Each array value must be an array of the following structure:
* <ul>
* <li>source: required, the full path of the file/directory to be copied from</li>
* <li>target: required, the full path of the file/directory to be copied to</li>
* <li>callback: optional, the callback to be invoked when copying a file. The callback function
* should be declared as follows:
* <pre>
* function foo($source,$params)
* </pre>
* where $source parameter is the source file path, and the content returned
* by the function will be saved into the target file.</li>
* <li>params: optional, the parameters to be passed to the callback</li>
* </ul>
* @see buildFileList
*/
public static function copyFiles($fileList)
{
$overwriteAll = false;
foreach($fileList as $name=>$file) {
$source = strtr($file['source'], '/\\', DIRECTORY_SEPARATOR);
$target = strtr($file['target'], '/\\', DIRECTORY_SEPARATOR);
$callback = isset($file['callback']) ? $file['callback'] : null;
$params = isset($file['params']) ? $file['params'] : null;
if(is_dir($source)) {
try {
self::ensureDirectory($target);
}
catch (Exception $e) {
mkdir($target, true, 0777);
}
continue;
}
if($callback !== null) {
$content = call_user_func($callback, $source, $params);
}
else {
$content = file_get_contents($source);
}
if(is_file($target)) {
if($content === file_get_contents($target)) {
echo " unchanged $name\n";
continue;
}
if($overwriteAll) {
echo " overwrite $name\n";
}
else {
echo " exist $name\n";
echo " ...overwrite? [Yes|No|All|Quit] ";
$answer = trim(fgets(STDIN));
if(!strncasecmp($answer, 'q', 1)) {
return;
}
elseif(!strncasecmp($answer, 'y', 1)) {
echo " overwrite $name\n";
}
elseif(!strncasecmp($answer, 'a', 1)) {
echo " overwrite $name\n";
$overwriteAll = true;
}
else {
echo " skip $name\n";
continue;
}
}
}
else {
try {
self::ensureDirectory(dirname($target));
}
catch (Exception $e) {
mkdir(dirname($target), true, 0777);
}
echo " generate $name\n";
}
file_put_contents($target, $content);
}
}
/**
* Builds the file list of a directory.
* This method traverses through the specified directory and builds
* a list of files and subdirectories that the directory contains.
* The result of this function can be passed to {@link copyFiles}.
* @param string $sourceDir the source directory
* @param string $targetDir the target directory
* @param string $baseDir base directory
* @param array $ignoreFiles list of the names of files that should
* be ignored in list building process. Argument available since 1.1.11.
* @param array $renameMap hash array of file names that should be
* renamed. Example value: array('1.old.txt'=>'2.new.txt').
* @return array the file list (see {@link copyFiles})
*/
public static function buildFileList($sourceDir, $targetDir, $baseDir='', $ignoreFiles=array(), $renameMap=array())
{
$list = array();
$handle = opendir($sourceDir);
while(($file = readdir($handle)) !== false) {
if(in_array($file, array('.', '..', '.svn', '.gitignore')) || in_array($file, $ignoreFiles)) {
continue;
}
$sourcePath = $sourceDir.DIRECTORY_SEPARATOR.$file;
$targetPath = $targetDir.DIRECTORY_SEPARATOR.strtr($file, $renameMap);
$name = $baseDir === '' ? $file : $baseDir.'/'.$file;
$list[$name] = array(
'source' => $sourcePath,
'target' => $targetPath,
);
if(is_dir($sourcePath)) {
$list = array_merge($list, self::buildFileList($sourcePath, $targetPath, $name, $ignoreFiles, $renameMap));
}
}
closedir($handle);
return $list;
}
}