/**
* This function generates a new .js file from the existing files (if anything new happen to them or does not
* exist). The name of the new file will be returned.
*
* @api
*
* @param array $files
*
* @return string|false false on error or nothing
*/
public static function combine(array $files)
{
if (empty($files)) {
return false;
}
$target = self::getTargetPath();
$source = self::getSourcePath();
// identify file combinations by hash
$jsHash = md5(serialize($files));
$targetfile = $target . $jsHash . '.js';
// check if any source file was modified
$needUpdate = false;
if (file_exists($targetfile)) {
$hashtime = filemtime($targetfile);
foreach ($files as $file) {
if (substr($file['name'], 0, 1) === '/') {
$filename = $file['name'];
} elseif ($file['relative']) {
// relative to public/js
$filename = $target . $file['name'] . '.js';
} else {
// use javascript folder
$filename = $source . $file['name'] . '.js.tpl';
}
if ($hashtime < filemtime($filename)) {
$needUpdate = true;
break;
}
}
} else {
// file does not exist, so we need an update anyway
$needUpdate = true;
}
// we can abort if no update is required
if ($needUpdate === false) {
return $jsHash;
}
// make sure, that the target directory exists
if (!is_dir($target)) {
FileUtil::makedir($target);
}
// combine file contents
$content = '';
foreach ($files as $file) {
try {
if (substr($file['name'], 0, 1) === '/') {
if (strpos($file['name'], '.tpl') > 0) {
$nextcontent = JavascriptTemplate::getInstance()->fetch($file['name']);
} else {
$nextcontent = file_get_contents($file['name']);
}
} elseif ($file['relative']) {
$nextcontent = file_get_contents($target . $file['name'] . '.js');
} else {
$nextcontent = JavascriptTemplate::getInstance()->fetch($source . $file['name'] . '.js.tpl');
}
// do not double minify
if (strpos($file['name'], '.min') > 0 || strpos($file['name'], '.pack') > 0 || !method_exists('\\JShrink\\Minifier', 'minify')) {
$content .= $nextcontent . "\n";
} else {
$content .= \JShrink\Minifier::minify($nextcontent) . "\n";
}
} catch (\ErrorException $exception) {
Logger::getInstance()->exception($exception);
}
}
// foreach file
// write minified version
$success = file_put_contents($targetfile, $content);
// adjust file permissions for webserver
if ($success) {
chmod($targetfile, Config::getDetail('smarty', 'file_perms', self::$defaultConfig));
}
// foreach scssFiles
return $jsHash;
}
/**
* This function is the final step to render a website, it passes the final arguments to the template, including
* all error messages, gathered so far. And finally flushes the website content.
*
* @api
*/
public function display()
{
// minify js
$jsFile = template\JavascriptTemplate::combine($this->jsFiles);
if ($jsFile !== false) {
$this->assign('customjsfile', [$jsFile]);
} else {
$this->assign('customjsfile', []);
}
// minify css
$cssFile = template\CssTemplate::combine($this->cssFiles);
if ($cssFile !== false) {
$this->assign('customcssfile', [$cssFile]);
} else {
$this->assign('customcssfile', []);
}
// this code is not safe for use in different tabs
foreach (Session::getErrorMsg() as $error) {
$this->append('errors', ($error['field'] ? '"' . $error['field'] . '" - ' : '') . $error['content']);
}
foreach (Session::getSuccessMsg() as $success) {
$this->append('success', $success);
}
// we need a relative dir from smarty templates
template\HtmlTemplate::getInstance()->display('layout.tpl');
// after we've displayed them, we may reset them
Session::resetErrorMsg();
Session::resetSuccessMsg();
}