<?php

class Page_SysLog extends Page
{

	const PROP_ANON_DAYS = 'syslog.anon-days'; // Copy in cronjob


	protected function doPreprocess()
	{
		User::load();

		if (!User::isLoggedIn()) {
			Message::addError('main.no-permission');
			Util::redirect('?do=Main');
		}

		if (($days = Request::post('anondays', false, 'int')) !== false) {
			User::assertPermission('configure-anonymization', NULL,'?do=syslog');
			if ($days < 0 || $days > 180) {
				Message::addError('anon-days-out-of-range', $days);
			} else {
				Property::set(self::PROP_ANON_DAYS, $days);
				Message::addSuccess('anon-days-saved');
			}
			Util::redirect('?do=syslog');
		}
		if (Request::isPost()) {
			$pairs = [];
			foreach (['search', 'filter', 'not', 'machineuuid'] as $key) {
				$val = Request::any($key, false, 'string');
				if (!empty($val)) {
					if ($key === 'not') {
						$val = (bool)$val;
					}
					$pairs[$key] = $val;
				}
				Session::set('log_' . $key, $pairs[$key] ?? false, false);
			}
			Util::redirect('?do=syslog&' . http_build_query($pairs));
		}
		User::assertPermission('*');
	}

	protected function doRender()
	{
		$data = ['anondays' => Property::get(self::PROP_ANON_DAYS, 0)];
		Permission::addGlobalTags($data['perms'], NULL, ['configure-anonymization', 'export-user-data']);
		Render::addTemplate("heading", $data);

		if (!User::hasPermission("view")) {
			Message::addError('main.no-permission');
			return;
		}

		$cutoff = strtotime('-1 month');
		$res = Database::simpleQuery("SELECT logtypeid, Count(*) AS counter
			FROM clientlog
			WHERE dateline > $cutoff
			GROUP BY logtypeid ORDER BY counter ASC");
		$types = array();
		foreach ($res as $row) {
			$types[$row['logtypeid']] = $row;
		}
		if (Request::get('filter') !== false || Request::get('search') !== false) {
			$search = Request::get('search');
			$filter = Request::get('filter');
			$not = Request::get('not', false, 'bool');
		} else {
			$search = Session::get('log_search');
			$filter = Session::get('log_filter');
			$not = (bool)Session::get('log_not');
		}
		$qArgs = [];
		$whereClause = '1';
		if (!empty($filter)) {
			$whereClause .= ' AND ( ';
			if ($not) {
				$whereClause .= 'NOT ';
			}
			$filterList = array_unique(explode(',', $filter));
			foreach ($filterList as $filterItem) {
				if (!isset($types[$filterItem])) {
					$types[$filterItem] = ['logtypeid' => $filterItem, 'counter' => ''];
				}
			}
			$whereClause .= "logtypeid IN (:typeids) )";
			$qArgs['typeids'] = $filterList;
		}
		if (!empty($search)) {
			$qArgs['search'] = '%' . str_replace(array('=', '_', '%', '*', '?'), array('==', '=_', '=%', '%', '_'), $search) . '%';
			$whereClause .= " AND description LIKE :search ESCAPE '='";
		}
		if (Request::get('machineuuid')) {
			$whereClause .= " AND machineuuid = :uuid";
			$qArgs['uuid'] = Request::get('machineuuid', '', 'string');
		}

		$allowedLocations = User::getAllowedLocations("view");
		$joinClause = "";
		if (!in_array(0, $allowedLocations)) {
			$joinClause = "INNER JOIN machine USING (machineuuid)";
			$whereClause .= ' AND locationid IN (:allowedLocations)';
			$qArgs['allowedLocations'] = $allowedLocations;
		}

		$lines = array();
		$paginate = new Paginate("SELECT logid, dateline, logtypeid, clientlog.clientip, clientlog.machineuuid, description, extra
			FROM clientlog $joinClause
			WHERE $whereClause
			ORDER BY logid DESC", 50);
		$res = $paginate->exec($qArgs);
		foreach ($res as $row) {
			$row['date'] = Util::prettyTime($row['dateline']);
			$row['icon'] = $this->eventToIconName($row['logtypeid']);
			$lines[] = $row;
		}

		$paginate->render('page-syslog', array(
			'filter'   => $filter,
			'search'   => $search,
			'not'      => $not,
			'list'     => $lines,
			'types'    => json_encode(array_values($types)),
			'machineuuid' => Request::get('machineuuid'),
		));
	}

	private function eventToIconName(string $event): string
	{
		switch ($event) {
		case 'session-open':
			return 'glyphicon-log-in';
		case 'session-close':
			return 'glyphicon-log-out';
		case 'partition-swap':
			return 'glyphicon-info-sign';
		case 'partition-temp':
		case 'smartctl-realloc':
			return 'glyphicon-exclamation-sign';
		default:
			return 'glyphicon-minus';
		}
	}

}