<?php
/*
The match section performs AND operation on different matches: for example, if you have from and rcpt in the same rule,
then the rule matches only when from AND rcpt match. For similar matches, the OR rule applies: if you have multiple rcpt matches,
then any of these will trigger the rule. If a rule is triggered then no more rules are matched.
*/
header('Content-Type: text/plain');
require_once "vars.inc.php";

ini_set('error_reporting', 0);

$dsn = $database_type . ':host=' . $database_host . ';dbname=' . $database_name;
$opt = [
    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
    PDO::ATTR_EMULATE_PREPARES   => false,
];
try {
  $pdo = new PDO($dsn, $database_user, $database_pass, $opt);
  $stmt = $pdo->query("SELECT * FROM `filterconf`");
}
catch (PDOException $e) {
  echo 'settings { }';
  exit;
}

function parse_email($email) {
  if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
  $a = strrpos($email, '@');
  return array('local' => substr($email, 0, $a), 'domain' => substr($email, $a));
}

function ucl_rcpts($object, $type) {
  global $pdo;
  if ($type == 'mailbox') {
    // Standard aliases
    $stmt = $pdo->prepare("SELECT `address` FROM `alias`
      WHERE `goto` LIKE :object_goto
        AND `address` NOT LIKE '@%'
        AND `address` != :object_address");
    $stmt->execute(array(
      ':object_goto' => '%' . $object . '%',
      ':object_address' => $object
    ));
    $standard_aliases = $stmt->fetchAll(PDO::FETCH_ASSOC);
    while ($row = array_shift($standard_aliases)) {
      $local = parse_email($row['address'])['local'];
      $domain = parse_email($row['address'])['domain'];
      if (!empty($local) && !empty($domain)) {
        $rcpt[] = '/' . $local . '\+.*' . $domain . '/i';
      }
      $rcpt[] = $row['address'];
    }
    // Aliases by alias domains
    $stmt = $pdo->prepare("SELECT CONCAT(`local_part`, '@', `alias_domain`.`alias_domain`) AS `alias` FROM `mailbox` 
      LEFT OUTER JOIN `alias_domain` ON `mailbox`.`domain` = `alias_domain`.`target_domain`
      WHERE `mailbox`.`username` = :object");
    $stmt->execute(array(
      ':object' => $object
    ));
    $by_domain_aliases = $stmt->fetchAll(PDO::FETCH_ASSOC);
    array_filter($by_domain_aliases);
    while ($row = array_shift($by_domain_aliases)) {
      if (!empty($row['alias'])) {
        $local = parse_email($row['alias'])['local'];
        $domain = parse_email($row['alias'])['domain'];
        if (!empty($local) && !empty($domain)) {
          $rcpt[] = '/' . $local . '\+.*' . $domain . '/i';
        }
      $rcpt[] = $row['alias'];
      }
    }
    // Mailbox self
    $local = parse_email($row['object'])['local'];
    $domain = parse_email($row['object'])['domain'];
    if (!empty($local) && !empty($domain)) {
      $rcpt[] = '/' . $local . '\+.*' . $domain . '/i';
    }
    $rcpt[] = $object;
  }
  elseif ($type == 'domain') {
    // Domain self
		$rcpt[] = '/.*@' . $object . '/i';
		$stmt = $pdo->prepare("SELECT `alias_domain` FROM `alias_domain`
			WHERE `target_domain` = :object");
		$stmt->execute(array(':object' => $row['object']));
		$alias_domains = $stmt->fetchAll(PDO::FETCH_ASSOC);
		array_filter($alias_domains);
		while ($row = array_shift($alias_domains)) {
      $rcpt[] = '/.*@' . $row['alias_domain'] . '/i';
		}
  }
  if (!empty($rcpt)) {
    return $rcpt;
  }
  return false;
}
?>
settings {
<?php

/*
// Start custom scores for users
*/

$stmt = $pdo->query("SELECT DISTINCT `object` FROM `filterconf` WHERE `option` = 'highspamlevel' OR `option` = 'lowspamlevel'");
$rows = $stmt->fetchAll(PDO::FETCH_ASSOC);

while ($row = array_shift($rows)) {
	$username_sane = preg_replace("/[^a-zA-Z0-9]+/", "", $row['object']);
?>
	score_<?=$username_sane;?> {
		priority = 4;
<?php
  foreach (ucl_rcpts($row['object'], 'mailbox') as $rcpt) {
?>
		rcpt = "<?=$rcpt;?>";
<?php
  }
	$stmt = $pdo->prepare("SELECT `option`, `value` FROM `filterconf` 
		WHERE (`option` = 'highspamlevel' OR `option` = 'lowspamlevel')
			AND `object`= :object");
	$stmt->execute(array(':object' => $row['object']));
	$spamscore = $stmt->fetchAll(PDO::FETCH_COLUMN|PDO::FETCH_GROUP);
?>
		apply "default" {
			actions {
				reject = <?=$spamscore['highspamlevel'][0];?>;
				greylist = <?=$spamscore['lowspamlevel'][0] - 1;?>;
				"add header" = <?=$spamscore['lowspamlevel'][0];?>;
			}
		}
	}
<?php
}

/*
// Start whitelist
*/

$stmt = $pdo->query("SELECT DISTINCT `object` FROM `filterconf` WHERE `option` = 'whitelist_from'");
$rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
while ($row = array_shift($rows)) {
	$username_sane = preg_replace("/[^a-zA-Z0-9]+/", "", $row['object']);
?>
	whitelist_<?=$username_sane;?> {
<?php
	$stmt = $pdo->prepare("SELECT GROUP_CONCAT(REPLACE(`value`, '*', '.*') SEPARATOR '|') AS `value` FROM `filterconf`
		WHERE `object`= :object
			AND `option` = 'whitelist_from'");
	$stmt->execute(array(':object' => $row['object']));
	$grouped_lists = $stmt->fetchAll(PDO::FETCH_COLUMN);
	$value_sane = preg_replace("/\.\./", ".", (preg_replace("/\*/", ".*", $grouped_lists[0])));
?>
		from = "/(<?=$value_sane;?>)/i";
<?php
	if (!filter_var(trim($row['object']), FILTER_VALIDATE_EMAIL)) {
?>
		priority = 5;
<?php
		foreach (ucl_rcpts($row['object'], 'mailbox') as $rcpt) {
?>
		rcpt = "<?=$rcpt;?>";
<?php
		}
	}
	else {
?>
		priority = 6;
<?php
		foreach (ucl_rcpts($row['object'], 'mailbox') as $rcpt) {
?>
		rcpt = "<?=$rcpt;?>";
<?php
		}
	}
?>
		apply "default" {
			MAILCOW_WHITE = -999.0;
		}
		symbols [
			"MAILCOW_WHITE"
		]
	}
<?php
}

/*
// Start blacklist
*/

$stmt = $pdo->query("SELECT DISTINCT `object` FROM `filterconf` WHERE `option` = 'blacklist_from'");
$rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
while ($row = array_shift($rows)) {
	$username_sane = preg_replace("/[^a-zA-Z0-9]+/", "", $row['object']);
?>
	blacklist_<?=$username_sane;?> {
<?php
	$stmt = $pdo->prepare("SELECT GROUP_CONCAT(REPLACE(`value`, '*', '.*') SEPARATOR '|') AS `value` FROM `filterconf`
		WHERE `object`= :object
			AND `option` = 'blacklist_from'");
	$stmt->execute(array(':object' => $row['object']));
	$grouped_lists = $stmt->fetchAll(PDO::FETCH_COLUMN);
	$value_sane = preg_replace("/\.\./", ".", (preg_replace("/\*/", ".*", $grouped_lists[0])));
?>
		from = "/(<?=$value_sane;?>)/i";
<?php
	if (!filter_var(trim($row['object']), FILTER_VALIDATE_EMAIL)) {
?>
		priority = 5;
<?php
		foreach (ucl_rcpts($row['object'], 'mailbox') as $rcpt) {
?>
		rcpt = "<?=$rcpt;?>";
<?php
		}
	}
	else {
?>
		priority = 6;
<?php
		foreach (ucl_rcpts($row['object'], 'mailbox') as $rcpt) {
?>
		rcpt = "<?=$rcpt;?>";
<?php
		}
	}
?>
		apply "default" {
			MAILCOW_BLACK = 999.0;
		}
		symbols [
			"MAILCOW_BLACK"
		]
	}
<?php
}
?>
}