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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 OCP\Files\NotFoundException;
use OCP\IURLGenerator;
class SCSSCacher {
protected $root;
protected $folder;
protected $file;
protected $fileNameSCSS;
protected $fileNameCSS;
protected $fileLoc;
protected $rootCssLoc;
/** @var \OCP\ILogger */
protected $logger;
/** @var \OCP\Files\IAppData */
protected $appData;
/** @var \OCP\IURLGenerator */
protected $urlGenerator;
/** @var \OCP\Files\IConfig */
protected $systemConfig;
/**
* @param \OCP\ILogger $logger
* @param string $root
* @param string $file
* @param \OCP\Files\IAppData $appData
*/
public function __construct(\OCP\ILogger $logger, $root, $file, \OCP\Files\IAppData $appData, \OCP\IURLGenerator $urlGenerator, $systemConfig) {
$this->logger = $logger;
$this->appData = $appData;
$this->urlGenerator = $urlGenerator;
$this->systemConfig = $systemConfig;
$this->root = $root;
$this->file = explode('/', $root.'/'.$file);
/* filenames */
$this->fileNameSCSS = array_pop($this->file);
$this->fileNameCSS = str_replace('.scss', '.css', $this->fileNameSCSS);
$this->fileLoc = implode('/', $this->file);
// base uri to css file
$this->rootCssLoc = explode('/', $file);
array_pop($this->rootCssLoc);
$this->rootCssLoc = implode('/', $this->rootCssLoc);
try {
$this->folder = $this->appData->getFolder('core');
} catch(NotFoundException $e) {
// creating css appdata folder
$this->folder = $this->appData->newFolder('core');
}
}
/**
* Process the caching process if needed
* @return boolean
*/
public function process() {
if($this->is_cached()) {
return true;
} else {
return $this->cache();
}
return false;
}
/**
* Check if the file is cached or not
* @return boolean
*/
private function is_cached() {
try{
$cachedfile = $this->folder->getFile($this->fileNameCSS);
if( $cachedfile->getMTime() > filemtime($this->fileLoc.'/'.$this->fileNameSCSS)
&& $cachedfile->getSize() > 0 ) {
return true;
}
} catch(NotFoundException $e) {
return false;
}
return false;
}
/**
* Cache the file with AppData
* @return boolean
*/
private function cache() {
$scss = new Compiler();
$scss->setImportPaths($this->fileLoc);
if($this->systemConfig->getValue('debug')) {
// Debug mode
$scss->setFormatter('Leafo\ScssPhp\Formatter\Expanded');
$scss->setLineNumberStyle(Compiler::LINE_COMMENTS);
} else {
// Compression
$scss->setFormatter('Leafo\ScssPhp\Formatter\Crunched');
}
try {
$cachedfile = $this->folder->getFile($this->fileNameCSS);
} catch(NotFoundException $e) {
$cachedfile = $this->folder->newFile($this->fileNameCSS);
}
// Compile
try {
$compiledScss = $scss->compile('@import "'.$this->fileNameSCSS.'";');
} catch(ParserException $e) {
$this->logger->error($e, ['app' => 'core']);
return false;
}
try {
$cachedfile->putContent($this->rebaseUrls($compiledScss));
$this->logger->debug($this->rootCssLoc.'/'.$this->fileNameSCSS.' compiled and successfully cached', ['app' => 'core']);
return true;
} catch(NotFoundException $e) {
return false;
}
return false;
}
/**
* Add the correct uri prefix to make uri valid again
* @param string $css
* @return string
*/
private function rebaseUrls($css) {
$re = '/url\([\'"]([\.\w?=\/-]*)[\'"]\)/x';
$subst = 'url(\'../../../'.$this->rootCssLoc.'/$1\')';
return preg_replace($re, $subst, $css);
}
/**
* Return the cached css file uri
* @return string
*/
public function getCachedSCSS() {
return substr($this->urlGenerator->linkToRoute('core.Css.getCss', array('fileName' => $this->fileNameCSS)), 1);
}
}
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