fembooru/ext/regen_thumb/main.php

<?php

class RegenThumb extends Extension {
	var $theme;

	public function receive_event($event) {
		if(is_null($this->theme)) $this->theme = get_theme_object("regen_thumb", "RegenThumbTheme");

		if(is_a($event, 'PageRequestEvent') && ($event->page_name == "regen_thumb")) {
			global $user;
			if($user->is_admin() && isset($_POST['image_id'])) {
				global $database;
				$image = $database->get_image(int_escape($_POST['image_id']));
				send_event(new ThumbnailGenerationEvent($image->hash, $image->ext));
				$this->theme->display_results($event->page, $image);
			}
		}

		if(is_a($event, 'DisplayingImageEvent')) {
			global $user;
			if($user->is_admin()) {
				$this->theme->display_buttons($event->page, $event->image->id);
			}
		}
	}
}
add_event_listener(new RegenThumb());
?>