272 lines
7.5 KiB
PHP
272 lines
7.5 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2018 John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>
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* @copyright Copyright (c) 2019 Janis Köhr <janiskoehr@icloud.com>
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*
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Janis Köhr <janis.koehr@novatec-gmbh.de>
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* @author Joas Schilling <coding@schilljs.com>
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* @author John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>
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* @author Julius Härtl <jus@bitgrid.net>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Citharel <nextcloud@tcit.fr>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OCA\Accessibility\Controller;
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use OC\Template\IconsCacher;
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use OCP\App\IAppManager;
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use OCP\AppFramework\Controller;
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use OCP\AppFramework\Http;
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use OCP\AppFramework\Http\DataDisplayResponse;
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use OCP\AppFramework\Utility\ITimeFactory;
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use OCP\IConfig;
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use OCP\IRequest;
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use OCP\IUserSession;
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use Psr\Log\LoggerInterface;
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use ScssPhp\ScssPhp\Compiler;
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use ScssPhp\ScssPhp\Exception\ParserException;
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use ScssPhp\ScssPhp\OutputStyle;
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class AccessibilityController extends Controller {
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/** @var string */
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protected $appName;
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/** @var string */
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protected $serverRoot;
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/** @var IConfig */
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private $config;
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/** @var LoggerInterface */
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private $logger;
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/** @var ITimeFactory */
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protected $timeFactory;
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/** @var IUserSession */
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private $userSession;
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/** @var IconsCacher */
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protected $iconsCacher;
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/** @var \OC_Defaults */
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private $defaults;
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/** @var null|string */
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private $injectedVariables;
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/** @var string */
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private $appRoot;
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public function __construct(string $appName,
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IRequest $request,
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IConfig $config,
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LoggerInterface $logger,
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ITimeFactory $timeFactory,
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IUserSession $userSession,
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IAppManager $appManager,
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IconsCacher $iconsCacher,
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\OC_Defaults $defaults) {
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parent::__construct($appName, $request);
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$this->appName = $appName;
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$this->config = $config;
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$this->logger = $logger;
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$this->timeFactory = $timeFactory;
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$this->userSession = $userSession;
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$this->iconsCacher = $iconsCacher;
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$this->defaults = $defaults;
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$this->serverRoot = \OC::$SERVERROOT;
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$this->appRoot = $appManager->getAppPath($this->appName);
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}
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/**
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* @PublicPage
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* @NoCSRFRequired
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* @NoSameSiteCookieRequired
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*
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* @return DataDisplayResponse
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*/
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public function getCss(): DataDisplayResponse {
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$css = '';
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$imports = '';
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if ($this->userSession->isLoggedIn()) {
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$userValues = $this->getUserValues();
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} else {
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$userValues = ['dark'];
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}
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foreach ($userValues as $key => $scssFile) {
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if ($scssFile !== false) {
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if ($scssFile === 'highcontrast' && in_array('dark', $userValues)) {
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$scssFile .= 'dark';
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}
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$imports .= '@import "' . $scssFile . '";';
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}
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}
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if ($imports !== '') {
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$scss = new Compiler();
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$scss->setImportPaths([
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$this->appRoot . '/css/',
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$this->serverRoot . '/core/css/'
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]);
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// Continue after throw
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$scss->setOutputStyle(OutputStyle::COMPRESSED);
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// Import theme, variables and compile css4 variables
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try {
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$css .= $scss->compile(
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$imports .
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$this->getInjectedVariables() .
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'@import "variables.scss";' .
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'@import "css-variables.scss";'
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);
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} catch (ParserException $e) {
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$this->logger->error($e->getMessage(),
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[
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'app' => 'core',
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'exception' => $e,
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]
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);
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}
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}
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// We don't want to override vars with url since path is different
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$css = $this->filterOutRule('/--[a-z-:]+url\([^;]+\)/mi', $css);
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// Rebase all urls
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$appWebRoot = substr($this->appRoot, strlen($this->serverRoot) - strlen(\OC::$WEBROOT));
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$css = $this->rebaseUrls($css, $appWebRoot . '/css');
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if (in_array('dark', $userValues) && $this->iconsCacher->getCachedList() && $this->iconsCacher->getCachedList()->getSize() > 0) {
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$iconsCss = $this->invertSvgIconsColor($this->iconsCacher->getCachedList()->getContent());
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$css = $css . $iconsCss;
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}
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$response = new DataDisplayResponse($css, Http::STATUS_OK, ['Content-Type' => 'text/css']);
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// Set cache control
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$ttl = 31536000;
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$response->addHeader('Cache-Control', 'max-age=' . $ttl . ', immutable');
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$expires = new \DateTime();
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$expires->setTimestamp($this->timeFactory->getTime());
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$expires->add(new \DateInterval('PT' . $ttl . 'S'));
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$response->addHeader('Expires', $expires->format(\DateTime::RFC1123));
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$response->addHeader('Pragma', 'cache');
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// store current cache hash
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if ($this->userSession->isLoggedIn()) {
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$this->config->setUserValue($this->userSession->getUser()->getUID(), $this->appName, 'icons-css', md5($css));
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}
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return $response;
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}
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/**
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* Return an array with the user theme & font settings
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*
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* @return array
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*/
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private function getUserValues(): array {
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$userTheme = $this->config->getUserValue($this->userSession->getUser()->getUID(), $this->appName, 'theme', false);
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$userFont = $this->config->getUserValue($this->userSession->getUser()->getUID(), $this->appName, 'font', false);
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$userHighContrast = $this->config->getUserValue($this->userSession->getUser()->getUID(), $this->appName, 'highcontrast', false);
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return [$userTheme, $userHighContrast, $userFont];
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}
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/**
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* Remove all matches from the $rule regex
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*
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* @param string $rule regex to match
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* @param string $css string to parse
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* @return string
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*/
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private function filterOutRule(string $rule, string $css): string {
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return preg_replace($rule, '', $css);
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}
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/**
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* Add the correct uri prefix to make uri valid again
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*
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* @param string $css
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* @param string $webDir
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* @return string
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*/
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private function rebaseUrls(string $css, string $webDir): string {
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$re = '/url\([\'"]([^\/][\.\w?=\/-]*)[\'"]\)/x';
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$subst = 'url(\'' . $webDir . '/$1\')';
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return preg_replace($re, $subst, $css);
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}
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/**
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* Remove all matches from the $rule regex
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*
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* @param string $css string to parse
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* @return string
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*/
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private function invertSvgIconsColor(string $css) {
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return str_replace(
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['color=000&', 'color=fff&', 'color=***&'],
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['color=***&', 'color=000&', 'color=fff&'],
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str_replace(
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['color=000000&', 'color=ffffff&', 'color=******&'],
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['color=******&', 'color=000000&', 'color=ffffff&'],
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$css
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)
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);
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}
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/**
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* @return string SCSS code for variables from OC_Defaults
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*/
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private function getInjectedVariables(): string {
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if ($this->injectedVariables !== null) {
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return $this->injectedVariables;
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}
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$variables = '';
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foreach ($this->defaults->getScssVariables() as $key => $value) {
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$variables .= '$' . $key . ': ' . $value . ';';
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}
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// check for valid variables / otherwise fall back to defaults
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try {
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$scss = new Compiler();
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$scss->compile($variables);
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$this->injectedVariables = $variables;
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} catch (ParserException $e) {
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$this->logger->error($e->getMessage(),
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[
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'app' => 'core',
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'exception' => $e,
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]
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);
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}
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return $variables;
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}
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}
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