<?php

/*
Copyright (c) 2021, Jesse Norell
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name of ISPConfig nor the names of its contributors
      may be used to endorse or promote products derived from this software without
      specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

class cronjob_file_cleanup extends cronjob {

	// job schedule
	protected $_schedule = '* * * * *';
	protected $_run_at_new = true;

	public function onBeforeRun() {
		global $app;

		/* currently we only cleanup rspamd config files, so bail if not needed */
		if (! is_dir("/etc/rspamd/local.d/users/")) {
			return false;
		}

		return parent::onBeforeRun();
	}

	public function onRunJob() {
		global $app, $conf;

		$server_id = $conf['server_id'];

		/* rspamd config file cleanup */
		if (is_dir("/etc/rspamd/local.d/users/")) {
			$mail_access = array();
			$sql = "SELECT access_id as id FROM mail_access WHERE active = 'y' AND server_id = ?";
			$records = $app->db->queryAllRecords($sql, $server_id);
			if(is_array($records)) {
				foreach($records as $rec){
					$mail_access[$rec['id']] = $rec['id'];
				}
			}

			$spamfilter_wblist = array();
			$sql = "SELECT wblist_id as id FROM spamfilter_wblist WHERE active = 'y' AND server_id = ?";
			$records = $app->db->queryAllRecords($sql, $server_id);
			if(is_array($records)) {
				foreach($records as $rec){
					$spamfilter_wblist[$rec['id']] = $rec['id'];
				}
			}

			$spamfilter_users = array();
			$sql = "SELECT id FROM spamfilter_users WHERE policy_id != 0 AND server_id = ?";
			$records = $app->db->queryAllRecords($sql, $server_id);
			if(is_array($records)) {
				foreach($records as $rec){
					$spamfilter_users[$rec['id']] = $rec['id'];
				}
			}

			$mail_user = array();
			$sql = "SELECT mailuser_id as id FROM mail_user WHERE postfix = 'y' AND server_id = ?";
			$records = $app->db->queryAllRecords($sql, $server_id);
			if(is_array($records)) {
				foreach($records as $rec){
					$mail_user[$rec['id']] = $rec['id'];
				}
			}

			$mail_forwarding = array();
			$sql = "SELECT forwarding_id as id FROM mail_forwarding WHERE active = 'y' AND server_id = ?";
			$records = $app->db->queryAllRecords($sql, $server_id);
			if(is_array($records)) {
				foreach($records as $rec){
					$mail_forwarding[$rec['id']] = $rec['id'];
				}
			}

			foreach (glob('/etc/rspamd/local.d/users/*.conf') as $file) {
				if($handle = fopen($file, 'r')) {
					if(($line = fgets($handle)) !== false) {
						if(preg_match('/^((?:global|spamfilter)_wblist|ispc_(spamfilter_user|mail_user|mail_forwarding))[_-](\d+)\s/', $line, $matches)) {
							switch($matches[1]) {
							case 'global_wblist':
								$remove = isset($mail_access[$matches[3]]) ? false : true;
								break;
							case 'spamfilter_wblist':
								$remove = isset($spamfilter_wblist[$matches[3]]) ? false : true;
								break;
							case 'ispc_spamfilter_user':
								$remove = isset($spamfilter_users[$matches[3]]) ? false : true;
								break;
							case 'ispc_mail_user':
								$remove = isset($mail_user[$matches[3]]) ? false : true;
								break;
							case 'ispc_mail_forwarding':
								$remove = isset($mail_forwarding[$matches[3]]) ? false : true;
								break;
							default:
								$app->log("conf file has unhandled rule naming convention, ignoring: $file", LOGLEVEL_DEBUG);
								$remove = false;
							}
							if($remove) {
								$app->log("$matches[1] id $matches[3] not found, removing $file", LOGLEVEL_DEBUG);
								unlink($file);
								$this->restartServiceDelayed('rspamd', 'reload');
							}
						} else {
							$app->log("conf file has unknown rule naming convention, ignoring: $file", LOGLEVEL_DEBUG);
						}
					}

					fclose($handle);
				}
			}
		}

		parent::onRunJob();
	}

}