/**
* 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'])) {
avada_Less_Cache::$cache_dir = $parser_options['cache_dir'];
}
if (empty(avada_Less_Cache::$cache_dir)) {
throw new Exception('cache_dir not set');
}
self::CheckCacheDir();
$less_files = (array) $less_files;
//create a file for variables
if (!empty($modify_vars)) {
$lessvars = avada_Less_Parser::serializeVars($modify_vars);
$vars_file = avada_Less_Cache::$cache_dir . 'lessphpvars_' . 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));
$list_file = avada_Less_Cache::$cache_dir . 'lessphp_' . $hash . '.list';
// check cached content
if (!isset($parser_options['use_cache']) || $parser_options['use_cache'] === true) {
if (file_exists($list_file)) {
$list = explode("\n", file_get_contents($list_file));
//pop the cached name that should match $compiled_name
$cached_name = array_pop($list);
if (!preg_match('/^lessphp_[a-f0-9]+\\.css$/', $cached_name)) {
$list[] = $cached_name;
$cached_name = false;
}
$compiled_name = self::CompiledName($list);
// if $cached_name != $compiled_name, we know we need to recompile
if (!$cached_name || $cached_name === $compiled_name) {
$output_file = self::OutputFile($compiled_name, $parser_options);
if ($output_file && file_exists($output_file)) {
@touch($list_file);
@touch($output_file);
return basename($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);
$output_file = self::OutputFile($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);
}
/**
* Allows a user to set variables values
* @param array $vars
* @return avada_Less_Parser
*/
public function ModifyVars($vars)
{
$this->input = avada_Less_Parser::serializeVars($vars);
$this->_parse();
return $this;
}