<?php
+/**
+ * @file view/theme/vier/style.php
+ */
+use Friendica\Core\Config;
+use Friendica\Core\PConfig;
+use Friendica\Model\Profile;
-if (file_exists("$THEMEPATH//style.css")){
- echo file_get_contents("$THEMEPATH//style.css");
-}
-
-$uid = get_theme_uid();
+$uid = Profile::getThemeUid();
-$style = get_pconfig( $uid, 'vier', 'style');
+$style = PConfig::get($uid, 'vier', 'style');
-if ($style == "")
- $style = get_config('vier', 'style');
+if (empty($style)) {
+ $style = Config::get('vier', 'style');
+}
-if ($style == "")
+if (empty($style)) {
$style = "plus";
+}
-if ($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")
- $stylecss = file_get_contents('view/theme/vier/dark.css');
+$stylecss = '';
+$modified = '';
+
+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('Error: missing file: "' . $stylecssfile .'" (userid: '. $uid .')');
+ }
+}
+$modified = gmdate('r', $modified);
-echo $stylecss;
+$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;