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PhabricatorMailUtil.php
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Wed, Mar 19, 10:32

PhabricatorMailUtil.php
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<?php
final class PhabricatorMailUtil
extends Phobject {
/**
* Normalize an email address for comparison or lookup.
*
* Phabricator can be configured to prepend a prefix to all reply addresses,
* which can make forwarding rules easier to write. This method strips the
* prefix if it is present, and normalizes casing and whitespace.
*
* @param PhutilEmailAddress Email address.
* @return PhutilEmailAddress Normalized address.
*/
public static function normalizeAddress(PhutilEmailAddress $address) {
$raw_address = $address->getAddress();
$raw_address = phutil_utf8_strtolower($raw_address);
$raw_address = trim($raw_address);
// If a mailbox prefix is configured and present, strip it off.
$prefix_key = 'metamta.single-reply-handler-prefix';
$prefix = PhabricatorEnv::getEnvConfig($prefix_key);
$len = strlen($prefix);
if ($len) {
$prefix = $prefix.'+';
$len = $len + 1;
if (!strncasecmp($raw_address, $prefix, $len)) {
$raw_address = substr($raw_address, $len);
}
}
return id(clone $address)
->setAddress($raw_address);
}
/**
* Determine if two inbound email addresses are effectively identical.
*
* This method strips and normalizes addresses so that equivalent variations
* are correctly detected as identical. For example, these addresses are all
* considered to match one another:
*
* "Abraham Lincoln" <alincoln@example.com>
* alincoln@example.com
* <ALincoln@example.com>
* "Abraham" <phabricator+ALINCOLN@EXAMPLE.COM> # With configured prefix.
*
* @param PhutilEmailAddress Email address.
* @param PhutilEmailAddress Another email address.
* @return bool True if addresses are effectively the same address.
*/
public static function matchAddresses(
PhutilEmailAddress $u,
PhutilEmailAddress $v) {
$u = self::normalizeAddress($u);
$v = self::normalizeAddress($v);
return ($u->getAddress() === $v->getAddress());
}
public static function isReservedAddress(PhutilEmailAddress $address) {
$address = self::normalizeAddress($address);
$local = $address->getLocalPart();
$reserved = array(
'admin',
'administrator',
'hostmaster',
'list',
'list-request',
'majordomo',
'postmaster',
'root',
'ssl-admin',
'ssladmin',
'ssladministrator',
'sslwebmaster',
'sysadmin',
'uucp',
'webmaster',
'noreply',
'no-reply',
);
$reserved = array_fuse($reserved);
if (isset($reserved[$local])) {
return true;
}
$default_address = id(new PhabricatorMailEmailEngine())
->newDefaultEmailAddress();
if (self::matchAddresses($address, $default_address)) {
return true;
}
$void_address = id(new PhabricatorMailEmailEngine())
->newVoidEmailAddress();
if (self::matchAddresses($address, $void_address)) {
return true;
}
return false;
}
public static function isUserAddress(PhutilEmailAddress $address) {
$user_email = id(new PhabricatorUserEmail())->loadOneWhere(
'address = %s',
$address->getAddress());
return (bool)$user_email;
}
}

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