PHP Web interface for generating QR codes https://qr.antopie.org
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<?php
require_once dirname( __FILE__ ).'/Version.php';
/**
* Utility for handling the generation and caching of css files
*
* @package Less
* @subpackage cache
*
*/
class Less_Cache {
// directory less.php can use for storing data
public static $cache_dir = false;
// prefix for the storing data
public static $prefix = 'lessphp_';
// prefix for the storing vars
public static $prefix_vars = 'lessphpvars_';
// specifies the number of seconds after which data created by less.php will be seen as 'garbage' and potentially cleaned up
public static $gc_lifetime = 604800;
/**
* Save and reuse the results of compiled less files.
* The first call to Get() will generate css and save it.
* Subsequent calls to Get() with the same arguments will return the same css filename
*
* @param array $less_files Array of .less files to compile
* @param array $parser_options Array of compiler options
* @param array $modify_vars Array of variables
* @return string Name of the css file
*/
public static function Get( $less_files, $parser_options = array(), $modify_vars = array() ) {
// check $cache_dir
if ( isset( $parser_options['cache_dir'] ) ) {
Less_Cache::$cache_dir = $parser_options['cache_dir'];
}
if ( empty( Less_Cache::$cache_dir ) ) {
throw new Exception( 'cache_dir not set' );
}
if ( isset( $parser_options['prefix'] ) ) {
Less_Cache::$prefix = $parser_options['prefix'];
}
if ( empty( Less_Cache::$prefix ) ) {
throw new Exception( 'prefix not set' );
}
if ( isset( $parser_options['prefix_vars'] ) ) {
Less_Cache::$prefix_vars = $parser_options['prefix_vars'];
}
if ( empty( Less_Cache::$prefix_vars ) ) {
throw new Exception( 'prefix_vars not set' );
}
self::CheckCacheDir();
$less_files = (array)$less_files;
// create a file for variables
if ( !empty( $modify_vars ) ) {
$lessvars = Less_Parser::serializeVars( $modify_vars );
$vars_file = Less_Cache::$cache_dir . Less_Cache::$prefix_vars . sha1( $lessvars ) . '.less';
if ( !file_exists( $vars_file ) ) {
file_put_contents( $vars_file, $lessvars );
}
$less_files += array( $vars_file => '/' );
}
// generate name for compiled css file
$hash = md5( json_encode( $less_files ) );
$list_file = Less_Cache::$cache_dir . Less_Cache::$prefix . $hash . '.list';
// check cached content
if ( !isset( $parser_options['use_cache'] ) || $parser_options['use_cache'] === true ) {
if ( file_exists( $list_file ) ) {
self::ListFiles( $list_file, $list, $cached_name );
$compiled_name = self::CompiledName( $list, $hash );
// if $cached_name is the same as the $compiled name, don't regenerate
if ( !$cached_name || $cached_name === $compiled_name ) {
$output_file = self::OutputFile( $compiled_name, $parser_options );
if ( $output_file && file_exists( $output_file ) ) {
@touch( $list_file );
return basename( $output_file ); // for backwards compatibility, we just return the name of the file
}
}
}
}
$compiled = self::Cache( $less_files, $parser_options );
if ( !$compiled ) {
return false;
}
$compiled_name = self::CompiledName( $less_files, $hash );
$output_file = self::OutputFile( $compiled_name, $parser_options );
// save the file list
$list = $less_files;
$list[] = $compiled_name;
$cache = implode( "\n", $list );
file_put_contents( $list_file, $cache );
// save the css
file_put_contents( $output_file, $compiled );
// clean up
self::CleanCache();
return basename( $output_file );
}
/**
* Force the compiler to regenerate the cached css file
*
* @param array $less_files Array of .less files to compile
* @param array $parser_options Array of compiler options
* @param array $modify_vars Array of variables
* @return string Name of the css file
*/
public static function Regen( $less_files, $parser_options = array(), $modify_vars = array() ) {
$parser_options['use_cache'] = false;
return self::Get( $less_files, $parser_options, $modify_vars );
}
public static function Cache( &$less_files, $parser_options = array() ) {
// get less.php if it exists
$file = dirname( __FILE__ ) . '/Less.php';
if ( file_exists( $file ) && !class_exists( 'Less_Parser' ) ) {
require_once $file;
}
$parser_options['cache_dir'] = Less_Cache::$cache_dir;
$parser = new Less_Parser( $parser_options );
// combine files
foreach ( $less_files as $file_path => $uri_or_less ) {
// treat as less markup if there are newline characters
if ( strpos( $uri_or_less, "\n" ) !== false ) {
$parser->Parse( $uri_or_less );
continue;
}
$parser->ParseFile( $file_path, $uri_or_less );
}
$compiled = $parser->getCss();
$less_files = $parser->allParsedFiles();
return $compiled;
}
private static function OutputFile( $compiled_name, $parser_options ) {
// custom output file
if ( !empty( $parser_options['output'] ) ) {
// relative to cache directory?
if ( preg_match( '#[\\\\/]#', $parser_options['output'] ) ) {
return $parser_options['output'];
}
return Less_Cache::$cache_dir.$parser_options['output'];
}
return Less_Cache::$cache_dir.$compiled_name;
}
private static function CompiledName( $files, $extrahash ) {
// save the file list
$temp = array( Less_Version::cache_version );
foreach ( $files as $file ) {
$temp[] = filemtime( $file )."\t".filesize( $file )."\t".$file;
}
return Less_Cache::$prefix.sha1( json_encode( $temp ).$extrahash ).'.css';
}
public static function SetCacheDir( $dir ) {
Less_Cache::$cache_dir = $dir;
self::CheckCacheDir();
}
public static function CheckCacheDir() {
Less_Cache::$cache_dir = str_replace( '\\', '/', Less_Cache::$cache_dir );
Less_Cache::$cache_dir = rtrim( Less_Cache::$cache_dir, '/' ).'/';
if ( !file_exists( Less_Cache::$cache_dir ) ) {
if ( !mkdir( Less_Cache::$cache_dir ) ) {
throw new Less_Exception_Parser( 'Less.php cache directory couldn\'t be created: '.Less_Cache::$cache_dir );
}
} elseif ( !is_dir( Less_Cache::$cache_dir ) ) {
throw new Less_Exception_Parser( 'Less.php cache directory doesn\'t exist: '.Less_Cache::$cache_dir );
} elseif ( !is_writable( Less_Cache::$cache_dir ) ) {
throw new Less_Exception_Parser( 'Less.php cache directory isn\'t writable: '.Less_Cache::$cache_dir );
}
}
/**
* Delete unused less.php files
*
*/
public static function CleanCache() {
static $clean = false;
if ( $clean || empty( Less_Cache::$cache_dir ) ) {
return;
}
$clean = true;
// only remove files with extensions created by less.php
// css files removed based on the list files
$remove_types = array( 'lesscache' => 1,'list' => 1,'less' => 1,'map' => 1 );
$files = scandir( Less_Cache::$cache_dir );
if ( !$files ) {
return;
}
$check_time = time() - self::$gc_lifetime;
foreach ( $files as $file ) {
// don't delete if the file wasn't created with less.php
if ( strpos( $file, Less_Cache::$prefix ) !== 0 ) {
continue;
}
$parts = explode( '.', $file );
$type = array_pop( $parts );
if ( !isset( $remove_types[$type] ) ) {
continue;
}
$full_path = Less_Cache::$cache_dir . $file;
$mtime = filemtime( $full_path );
// don't delete if it's a relatively new file
if ( $mtime > $check_time ) {
continue;
}
// delete the list file and associated css file
if ( $type === 'list' ) {
self::ListFiles( $full_path, $list, $css_file_name );
if ( $css_file_name ) {
$css_file = Less_Cache::$cache_dir . $css_file_name;
if ( file_exists( $css_file ) ) {
unlink( $css_file );
}
}
}
unlink( $full_path );
}
}
/**
* Get the list of less files and generated css file from a list file
*
*/
static function ListFiles( $list_file, &$list, &$css_file_name ) {
$list = explode( "\n", file_get_contents( $list_file ) );
// pop the cached name that should match $compiled_name
$css_file_name = array_pop( $list );
if ( !preg_match( '/^' . Less_Cache::$prefix . '[a-f0-9]+\.css$/', $css_file_name ) ) {
$list[] = $css_file_name;
$css_file_name = false;
}
}
}