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<?php
/**
* @copyright Copyright (c) 2016, John Molakvoæ (skjnldsv@protonmail.com)
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Template;
use Leafo\ScssPhp\Compiler;
use Leafo\ScssPhp\Exception\ParserException;
use Leafo\ScssPhp\Formatter\Crunched;
use Leafo\ScssPhp\Formatter\Expanded;
use OC\SystemConfig;
use OCP\Files\IAppData;
use OCP\Files\NotFoundException;
use OCP\Files\SimpleFS\ISimpleFolder;
use OCP\ILogger;
use OCP\IURLGenerator;
class SCSSCacher {
/** @var ILogger */
protected $logger;
/** @var IAppData */
protected $appData;
/** @var IURLGenerator */
protected $urlGenerator;
/** @var SystemConfig */
protected $systemConfig;
/**
* @param ILogger $logger
* @param IAppData $appData
* @param IURLGenerator $urlGenerator
* @param SystemConfig $systemConfig
*/
public function __construct(ILogger $logger, IAppData $appData, IURLGenerator $urlGenerator, SystemConfig $systemConfig) {
$this->logger = $logger;
$this->appData = $appData;
$this->urlGenerator = $urlGenerator;
$this->systemConfig = $systemConfig;
}
/**
* Process the caching process if needed
* @param string $root Root path to the nextcloud installation
* @param string $file
* @return boolean
*/
public function process($root, $file) {
$path = explode('/', $root . '/' . $file);
$fileNameSCSS = array_pop($path);
$fileNameCSS = str_replace('.scss', '.css', $fileNameSCSS);
$path = implode('/', $path);
$webDir = explode('/', $file);
array_pop($webDir);
$webDir = implode('/', $webDir);
try {
$folder = $this->appData->getFolder('core');
} catch(NotFoundException $e) {
// creating css appdata folder
$folder = $this->appData->newFolder('core');
}
if($this->isCached($fileNameCSS, $fileNameSCSS, $folder, $path)) {
return true;
} else {
return $this->cache($path, $fileNameCSS, $fileNameSCSS, $folder, $webDir);
}
}
/**
* Check if the file is cached or not
* @param string $fileNameCSS
* @param string $fileNameSCSS
* @param ISimpleFolder $folder
* @param string $path
* @return boolean
*/
private function isCached($fileNameCSS, $fileNameSCSS, ISimpleFolder $folder, $path) {
try{
$cachedFile = $folder->getFile($fileNameCSS);
if( $cachedFile->getMTime() > filemtime($path.'/'.$fileNameSCSS)
&& $cachedFile->getSize() > 0 ) {
return true;
}
} catch(NotFoundException $e) {
return false;
}
return false;
}
/**
* Cache the file with AppData
* @param string $path
* @param string $fileNameCSS
* @param string $fileNameSCSS
* @param ISimpleFolder $folder
* @param string $webDir
* @return boolean
*/
private function cache($path, $fileNameCSS, $fileNameSCSS, ISimpleFolder $folder, $webDir) {
$scss = new Compiler();
$scss->setImportPaths($path);
if($this->systemConfig->getValue('debug')) {
// Debug mode
$scss->setFormatter(Expanded::class);
$scss->setLineNumberStyle(Compiler::LINE_COMMENTS);
} else {
// Compression
$scss->setFormatter(Crunched::class);
}
try {
$cachedfile = $folder->getFile($fileNameCSS);
} catch(NotFoundException $e) {
$cachedfile = $folder->newFile($fileNameCSS);
}
// Compile
try {
$compiledScss = $scss->compile('@import "'.$fileNameSCSS.'";');
} catch(ParserException $e) {
$this->logger->error($e, ['app' => 'core']);
return false;
}
try {
$cachedfile->putContent($this->rebaseUrls($compiledScss, $webDir));
$this->logger->debug($webDir.'/'.$fileNameSCSS.' compiled and successfully cached', ['app' => 'core']);
return true;
} catch(NotFoundException $e) {
return false;
}
}
/**
* Add the correct uri prefix to make uri valid again
* @param string $css
* @param string $webDir
* @return string
*/
private function rebaseUrls($css, $webDir) {
$re = '/url\([\'"]([\.\w?=\/-]*)[\'"]\)/x';
// OC\Route\Router:75
if(($this->systemConfig->getValue('htaccess.IgnoreFrontController', false) === true || getenv('front_controller_active') === 'true')) {
$subst = 'url(\'../../'.$webDir.'/$1\')';
} else {
$subst = 'url(\'../../../'.$webDir.'/$1\')';
}
return preg_replace($re, $subst, $css);
}
/**
* Return the cached css file uri
* @param string $appName the app name
* @param string $fileName
* @return string
*/
public function getCachedSCSS($appName, $fileName) {
$tmpfileLoc = explode('/', $fileName);
$fileName = array_pop($tmpfileLoc);
$fileName = str_replace('.scss', '.css', $fileName);
return substr($this->urlGenerator->linkToRoute('core.Css.getCss', array('fileName' => $fileName, 'appName' => $appName)), strlen(\OC::$WEBROOT) + 1);
}
}
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