<?php
+/**
+ * @copyright Copyright (C) 2010-2021, the Friendica project
+ *
+ * @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 <https://www.gnu.org/licenses/>.
+ *
+ */
-if (file_exists("$THEMEPATH//style.css")){
- echo file_get_contents("$THEMEPATH//style.css");
-}
+use Friendica\Core\Logger;
+use Friendica\DI;
-$uid = get_theme_uid();
+$uid = $_REQUEST['puid'] ?? 0;
-$style = get_pconfig( $uid, 'vier', 'style');
+$style = DI::pConfig()->get($uid, 'vier', 'style');
-if ($style == "")
- $style = get_config('vier', 'style');
+if (empty($style)) {
+ $style = DI::config()->get('vier', 'style');
+}
-if ($style == "")
+if (empty($style)) {
$style = "plus";
+}
+
+$stylecss = '';
+$modified = '';
+
+$style = \Friendica\Util\Strings::sanitizeFilePathItem($style);
-if ($style == "flat")
- $stylecss = file_get_contents('view/theme/vier/flat.css');
-else if ($style == "netcolour")
- $stylecss = file_get_contents('view/theme/vier/netcolour.css');
-else if ($style == "breathe")
- $stylecss = file_get_contents('view/theme/vier/breathe.css');
-else if ($style == "plus")
- $stylecss = file_get_contents('view/theme/vier/plus.css');
-else if ($style == "dark")
- $stylecss = file_get_contents('view/theme/vier/dark.css');
+foreach (['style', $style] as $file) {
+ $stylecssfile = $THEMEPATH . DIRECTORY_SEPARATOR . $file .'.css';
+ if (file_exists($stylecssfile)) {
+ $stylecss .= file_get_contents($stylecssfile);
+ $stylemodified = filemtime($stylecssfile);
+ if ($stylemodified > $modified) {
+ $modified = $stylemodified;
+ }
+ } else {
+ //TODO: use Logger::ERROR?
+ Logger::log('Error: missing file: "' . $stylecssfile .'" (userid: '. $uid .')');
+ }
+}
+$modified = gmdate('r', $modified);
+
+$etag = md5($stylecss);
+
+// Only send the CSS file if it was changed
+header('Cache-Control: public');
+header('ETag: "'.$etag.'"');
+header('Last-Modified: '.$modified);
+if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
+ $cached_modified = gmdate('r', strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']));
+ $cached_etag = str_replace(['"', "-gzip"], ['', ''],
+ stripslashes($_SERVER['HTTP_IF_NONE_MATCH']));
+
+ if (($cached_modified == $modified) && ($cached_etag == $etag)) {
+ header('HTTP/1.1 304 Not Modified');
+ exit();
+ }
+}
echo $stylecss;