<?php
-function pretheme_init(&$a) {
- if($_REQUEST['theme']) echo json_encode(array('img' => get_theme_screenshot($_REQUEST['theme'])));
+use Friendica\App;
+use Friendica\Core\Theme;
+
+function pretheme_init(App $a) {
+
+ if ($_REQUEST['theme']) {
+ $theme = $_REQUEST['theme'];
+ $info = Theme::getInfo($theme);
+ if ($info) {
+ // unfortunately there will be no translation for this string
+ $desc = $info['description'];
+ $version = $info['version'];
+ $credits = $info['credits'];
+ } else {
+ $desc = '';
+ $version = '';
+ $credits = '';
+ }
+ echo json_encode(['img' => Theme::getScreenshot($theme), 'desc' => $desc, 'version' => $version, 'credits' => $credits]);
+ }
+
killme();
}