Differential D19948 Diff 47640 src/applications/metamta/util/PhabricatorMailUtil.php

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src/applications/metamta/util/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());
				}

				}