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<?php
/**
* @copyright Copyright (C) 2005-2009 eZ Systems AS. All rights reserved.
* @license http://ez.no/licenses/new_bsd New BSD License
* @version 1.8
* @filesource
* @package Base
*/
/**
* Provides a selection of static independent methods to provide functionality
* for file and file system handling.
*
* This example shows how to use the findRecursive method:
* <code>
* <?php
* // lists all the files under /etc (including subdirectories) that end in
* // .conf
* $confFiles = ezcBaseFile::findRecursive( "/etc", array( '@\.conf$@' ) );
*
* // lists all autoload files in the components source tree and excludes the
* // ones in the autoload subdirectory. Statistics are returned in the $stats
* // variable which is passed by reference.
* $files = ezcBaseFile::findRecursive(
* "/dat/dev/ezcomponents",
* array( '@src/.*_autoload.php$@' ),
* array( '@/autoload/@' ),
* $stats
* );
*
* // lists all binaries in /bin except the ones starting with a "g"
* $data = ezcBaseFile::findRecursive( "/bin", array(), array( '@^/bin/g@' ) );
* ?>
* </code>
*
* @package Base
* @version 1.8
* @mainclass
*/
class ezcBaseFile
{
/**
* This is the callback used by findRecursive to collect data.
*
* This callback method works together with walkRecursive() and is called
* for every file/and or directory. The $context is a callback specific
* container in which data can be stored and shared between the different
* calls to the callback function. The walkRecursive() function also passes
* in the full absolute directory in $sourceDir, the filename in $fileName
* and file information (such as size, modes, types) as an array as
* returned by PHP's stat() in the $fileInfo parameter.
*
* @param ezcBaseFileFindContext $context
* @param string $sourceDir
* @param string $fileName
* @param array(stat) $fileInfo
*/
static protected function findRecursiveCallback( ezcBaseFileFindContext $context, $sourceDir, $fileName, $fileInfo )
{
// ignore if we have a directory
if ( $fileInfo['mode'] & 0x4000 )
{
return;
}
// update the statistics
$context->elements[] = $sourceDir . DIRECTORY_SEPARATOR . $fileName;
$context->count++;
$context->size += $fileInfo['size'];
}
/**
* Walks files and directories recursively on a file system
*
* This method walks over a directory and calls a callback from every file
* and directory it finds. You can use $includeFilters to include only
* specific files, and $excludeFilters to exclude certain files from being
* returned. The function will always go into subdirectories even if the
* entry would not have passed the filters.
*
* The callback is passed in the $callback parameter, and the
* $callbackContext will be send to the callback function/method as
* parameter so that you can store data in there that persists with all the
* calls and recursive calls to this method. It's up to the callback method
* to do something useful with this. The callback function's parameters are
* in order:
*
* <ul>
* <li>ezcBaseFileFindContext $context</li>
* <li>string $sourceDir</li>
* <li>string $fileName</li>
* <li>array(stat) $fileInfo</li>
* </ul>
*
* See {@see findRecursiveCallback()} for an example of a callback function.
*
* Filters are regular expressions and are therefore required to have
* starting and ending delimiters. The Perl Compatible syntax is used as
* regular expression language.
*
* @param string $sourceDir
* @param array(string) $includeFilters
* @param array(string) $excludeFilters
* @param callback $callback
* @param mixed $callbackContext
*
* @throws ezcBaseFileNotFoundException if the $sourceDir directory is not
* a directory or does not exist.
* @throws ezcBaseFilePermissionException if the $sourceDir directory could
* not be opened for reading.
* @return array
*/
static public function walkRecursive( $sourceDir, array $includeFilters = array(), array $excludeFilters = array(), $callback, &$callbackContext )
{
if ( !is_dir( $sourceDir ) )
{
throw new ezcBaseFileNotFoundException( $sourceDir, 'directory' );
}
$elements = array();
$d = @dir( $sourceDir );
if ( !$d )
{
throw new ezcBaseFilePermissionException( $sourceDir, ezcBaseFileException::READ );
}
while ( ( $entry = $d->read() ) !== false )
{
if ( $entry == '.' || $entry == '..' )
{
continue;
}
$fileInfo = @stat( $sourceDir . DIRECTORY_SEPARATOR . $entry );
if ( !$fileInfo )
{
$fileInfo = array( 'size' => 0, 'mode' => 0 );
}
if ( $fileInfo['mode'] & 0x4000 )
{
// We need to ignore the Permission exceptions here as it can
// be normal that a directory can not be accessed. We only need
// the exception if the top directory could not be read.
try
{
call_user_func_array( $callback, array( $callbackContext, $sourceDir, $entry, $fileInfo ) );
$subList = self::walkRecursive( $sourceDir . DIRECTORY_SEPARATOR . $entry, $includeFilters, $excludeFilters, $callback, $callbackContext );
$elements = array_merge( $elements, $subList );
}
catch ( ezcBaseFilePermissionException $e )
{
}
}
else
{
// By default a file is included in the return list
$ok = true;
// Iterate over the $includeFilters and prohibit the file from
// being returned when atleast one of them does not match
foreach ( $includeFilters as $filter )
{
if ( !preg_match( $filter, $sourceDir . DIRECTORY_SEPARATOR . $entry ) )
{
$ok = false;
break;
}
}
// Iterate over the $excludeFilters and prohibit the file from
// being returns when atleast one of them matches
foreach ( $excludeFilters as $filter )
{
if ( preg_match( $filter, $sourceDir . DIRECTORY_SEPARATOR . $entry ) )
{
$ok = false;
break;
}
}
// If everything's allright, call the callback and add the
// entry to the elements array
if ( $ok )
{
call_user_func( $callback, $callbackContext, $sourceDir, $entry, $fileInfo );
$elements[] = $sourceDir . DIRECTORY_SEPARATOR . $entry;
}
}
}
sort( $elements );
return $elements;
}
/**
* Finds files recursively on a file system
*
* With this method you can scan the file system for files. You can use
* $includeFilters to include only specific files, and $excludeFilters to
* exclude certain files from being returned. The function will always go
* into subdirectories even if the entry would not have passed the filters.
* It uses the {@see walkRecursive()} method to do the actually recursion.
*
* Filters are regular expressions and are therefore required to have
* starting and ending delimiters. The Perl Compatible syntax is used as
* regular expression language.
*
* If you pass an empty array to the $statistics argument, the function
* will in details about the number of files found into the 'count' array
* element, and the total filesize in the 'size' array element. Because this
* argument is passed by reference, you *have* to pass a variable and you
* can not pass a constant value such as "array()".
*
* @param string $sourceDir
* @param array(string) $includeFilters
* @param array(string) $excludeFilters
* @param array() $statistics
*
* @throws ezcBaseFileNotFoundException if the $sourceDir directory is not
* a directory or does not exist.
* @throws ezcBaseFilePermissionException if the $sourceDir directory could
* not be opened for reading.
* @return array
*/
static public function findRecursive( $sourceDir, array $includeFilters = array(), array $excludeFilters = array(), &$statistics = null )
{
// init statistics array
if ( !is_array( $statistics ) || !array_key_exists( 'size', $statistics ) || !array_key_exists( 'count', $statistics ) )
{
$statistics['size'] = 0;
$statistics['count'] = 0;
}
// create the context, and then start walking over the array
$context = new ezcBaseFileFindContext;
self::walkRecursive( $sourceDir, $includeFilters, $excludeFilters, array( 'ezcBaseFile', 'findRecursiveCallback' ), $context );
// collect the statistics
$statistics['size'] = $context->size;
$statistics['count'] = $context->count;
// return the found and pattern-matched files
sort( $context->elements );
return $context->elements;
}
/**
* Removes files and directories recursively from a file system
*
* This method recursively removes the $directory and all its contents.
* You should be <b>extremely</b> careful with this method as it has the
* potential to erase everything that the current user has access to.
*
* @param string $directory
*/
static public function removeRecursive( $directory )
{
$sourceDir = realpath( $directory );
if ( !$sourceDir )
{
throw new ezcBaseFileNotFoundException( $directory, 'directory' );
}
$d = @dir( $sourceDir );
if ( !$d )
{
throw new ezcBaseFilePermissionException( $directory, ezcBaseFileException::READ );
}
// check if we can remove the dir
$parentDir = realpath( $directory . DIRECTORY_SEPARATOR . '..' );
if ( !is_writable( $parentDir ) )
{
throw new ezcBaseFilePermissionException( $parentDir, ezcBaseFileException::WRITE );
}
// loop over contents
while ( ( $entry = $d->read() ) !== false )
{
if ( $entry == '.' || $entry == '..' )
{
continue;
}
if ( is_dir( $sourceDir . DIRECTORY_SEPARATOR . $entry ) )
{
self::removeRecursive( $sourceDir . DIRECTORY_SEPARATOR . $entry );
}
else
{
if ( @unlink( $sourceDir . DIRECTORY_SEPARATOR . $entry ) === false )
{
throw new ezcBaseFilePermissionException( $directory . DIRECTORY_SEPARATOR . $entry, ezcBaseFileException::REMOVE );
}
}
}
$d->close();
rmdir( $sourceDir );
}
/**
* Recursively copy a file or directory.
*
* Recursively copy a file or directory in $source to the given
* destination. If a depth is given, the operation will stop, if the given
* recursion depth is reached. A depth of -1 means no limit, while a depth
* of 0 means, that only the current file or directory will be copied,
* without any recursion.
*
* You may optionally define modes used to create files and directories.
*
* @throws ezcBaseFileNotFoundException
* If the $sourceDir directory is not a directory or does not exist.
* @throws ezcBaseFilePermissionException
* If the $sourceDir directory could not be opened for reading, or the
* destination is not writeable.
*
* @param string $source
* @param string $destination
* @param int $depth
* @param int $dirMode
* @param int $fileMode
* @return void
*/
static public function copyRecursive( $source, $destination, $depth = -1, $dirMode = 0775, $fileMode = 0664 )
{
// Check if source file exists at all.
if ( !is_file( $source ) && !is_dir( $source ) )
{
throw new ezcBaseFileNotFoundException( $source );
}
// Destination file should NOT exist
if ( is_file( $destination ) || is_dir( $destination ) )
{
throw new ezcBaseFilePermissionException( $destination, ezcBaseFileException::WRITE );
}
// Skip non readable files in source directory
if ( !is_readable( $source ) )
{
return;
}
// Copy
if ( is_dir( $source ) )
{
mkdir( $destination );
// To ignore umask, umask() should not be changed with
// multithreaded servers...
chmod( $destination, $dirMode );
}
elseif ( is_file( $source ) )
{
copy( $source, $destination );
chmod( $destination, $fileMode );
}
if ( ( $depth === 0 ) ||
( !is_dir( $source ) ) )
{
// Do not recurse (any more)
return;
}
// Recurse
$dh = opendir( $source );
while ( ( $file = readdir( $dh ) ) !== false )
{
if ( ( $file === '.' ) ||
( $file === '..' ) )
{
continue;
}
self::copyRecursive(
$source . '/' . $file,
$destination . '/' . $file,
$depth - 1, $dirMode, $fileMode
);
}
}
/**
* Calculates the relative path of the file/directory '$path' to a given
* $base path.
*
* $path and $base should be fully absolute paths. This function returns the
* answer of "How do I go from $base to $path". If the $path and $base are
* the same path, the function returns '.'. This method does not touch the
* filesystem.
*
* @param string $path
* @param string $base
* @return string
*/
static public function calculateRelativePath( $path, $base )
{
// Sanitize the paths to use the correct directory separator for the platform
$path = strtr( $path, '\\/', DIRECTORY_SEPARATOR . DIRECTORY_SEPARATOR );
$base = strtr( $base, '\\/', DIRECTORY_SEPARATOR . DIRECTORY_SEPARATOR );
$base = explode( DIRECTORY_SEPARATOR, $base );
$path = explode( DIRECTORY_SEPARATOR, $path );
// If the paths are the same we return
if ( $base === $path )
{
return '.';
}
$result = '';
$pathPart = array_shift( $path );
$basePart = array_shift( $base );
while ( $pathPart == $basePart )
{
$pathPart = array_shift( $path );
$basePart = array_shift( $base );
}
if ( $pathPart != null )
{
array_unshift( $path, $pathPart );
}
if ( $basePart != null )
{
array_unshift( $base, $basePart );
}
$result = str_repeat( '..' . DIRECTORY_SEPARATOR, count( $base ) );
// prevent a trailing DIRECTORY_SEPARATOR in case there is only a ..
if ( count( $path ) == 0 )
{
$result = substr( $result, 0, -strlen( DIRECTORY_SEPARATOR ) );
}
$result .= join( DIRECTORY_SEPARATOR, $path );
return $result;
}
/**
* Returns whether the passed $path is an absolute path, giving the current $os.
*
* With the $os parameter you can tell this function to use the semantics
* for a different operating system to determine whether a path is
* absolute. The $os argument defaults to the OS that the script is running
* on.
*
* @param string $path
* @param string $os
* @return bool
*/
public static function isAbsolutePath( $path, $os = null )
{
if ( $os === null )
{
$os = ezcBaseFeatures::os();
}
// Stream wrapper like phar can also be considered absolute paths
if ( preg_match( '(^[a-z]{3,}://)S', $path ) )
{
return true;
}
switch ( $os )
{
case 'Windows':
// Sanitize the paths to use the correct directory separator for the platform
$path = strtr( $path, '\\/', '\\\\' );
// Absolute paths with drive letter: X:\
if ( preg_match( '@^[A-Z]:\\\\@i', $path ) )
{
return true;
}
// Absolute paths with network paths: \\server\share\
if ( preg_match( '@^\\\\\\\\[A-Z]+\\\\[^\\\\]@i', $path ) )
{
return true;
}
break;
case 'Mac':
case 'Linux':
case 'FreeBSD':
default:
// Sanitize the paths to use the correct directory separator for the platform
$path = strtr( $path, '\\/', '//' );
if ( $path[0] == '/' )
{
return true;
}
}
return false;
}
}
?>
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