<?php
/*
 * Name: System Info
 * Author: Shish <webmaster@shishnet.org>
 * License: GPLv2
 * Description: Show various bits of system information
 * Documentation:
 *  Knowing the information that this extension shows can be
 *  very useful for debugging. There's also an option to send
 *  your stats to my database, so I can get some idea of how
 *  shimmie is used, which servers I need to support, which
 *  versions of PHP I should test with, etc.
 */

class ET extends Extension {
	public function onPageRequest(PageRequestEvent $event) {
		global $user;
		if($event->page_matches("system_info")) {
			if($user->can("view_sysinfo")) {
				$this->theme->display_info_page($this->get_info());
			}
		}
	}

	public function onUserBlockBuilding(UserBlockBuildingEvent $event) {
		global $user;
		if($user->can("view_sysinfo")) {
			$event->add_link("System Info", make_link("system_info"));
		}
	}

	/**
	 * Collect the information and return it in a keyed array.
	 */
	private function get_info() {
		global $config, $database;
		global $_event_listeners; // yay for using secret globals \o/

		$info = array();
		$info['site_title'] = $config->get_string("title");
		$info['site_theme'] = $config->get_string("theme");
		$info['site_url']   = "http://" . $_SERVER["HTTP_HOST"] . get_base_href();

		$info['sys_shimmie'] = VERSION;
		$info['sys_schema']  = $config->get_string("db_version");
		$info['sys_php']     = phpversion();
		$info['sys_db']      = $database->get_driver_name();
		$info['sys_os']      = php_uname();
		$info['sys_disk']    = to_shorthand_int(disk_total_space("./") - disk_free_space("./")) . " / " .
		                       to_shorthand_int(disk_total_space("./"));
		$info['sys_server']  = $_SERVER["SERVER_SOFTWARE"];
		
		$info['thumb_engine']	= $config->get_string("thumb_engine");
		$info['thumb_quality']	= $config->get_int('thumb_quality');
		$info['thumb_width']	= $config->get_int('thumb_width');
		$info['thumb_height']	= $config->get_int('thumb_height');
		$info['thumb_mem']		= $config->get_int("thumb_mem_limit");

		$info['stat_images']   = $database->get_one("SELECT COUNT(*) FROM images");
		$info['stat_comments'] = $database->get_one("SELECT COUNT(*) FROM comments");
		$info['stat_users']    = $database->get_one("SELECT COUNT(*) FROM users");
		$info['stat_tags']     = $database->get_one("SELECT COUNT(*) FROM tags");
		$info['stat_image_tags'] = $database->get_one("SELECT COUNT(*) FROM image_tags");

		$els = array();
		foreach(get_declared_classes() as $class) {
			$rclass = new ReflectionClass($class);
			if($rclass->isAbstract()) {
				// don't do anything
			}
			elseif(is_subclass_of($class, "Extension")) {
				$els[] = $class;
			}
		}
		$info['sys_extensions'] = join(', ', $els);

		//$cfs = array();
		//foreach($database->get_all("SELECT name, value FROM config") as $pair) {
		//	$cfs[] = $pair['name']."=".$pair['value'];
		//}
		//$info[''] = "Config: ".join(", ", $cfs);

		return $info;
	}
}
?>
