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PhabricatorMailReplyHandler.php
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Tue, Dec 3, 13:32

PhabricatorMailReplyHandler.php
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<?php
/*
* Copyright 2011 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
abstract class PhabricatorMailReplyHandler {
private $mailReceiver;
private $actor;
final public function setMailReceiver($mail_receiver) {
$this->validateMailReceiver($mail_receiver);
$this->mailReceiver = $mail_receiver;
return $this;
}
final public function getMailReceiver() {
return $this->mailReceiver;
}
final public function setActor(PhabricatorUser $actor) {
$this->actor = $actor;
return $this;
}
final public function getActor() {
return $this->actor;
}
abstract public function validateMailReceiver($mail_receiver);
abstract public function getPrivateReplyHandlerEmailAddress(
PhabricatorObjectHandle $handle);
abstract public function getReplyHandlerDomain();
abstract public function getReplyHandlerInstructions();
abstract public function receiveEmail(PhabricatorMetaMTAReceivedMail $mail);
public function supportsPrivateReplies() {
return (bool)$this->getReplyHandlerDomain();
}
final public function supportsReplies() {
return $this->supportsPrivateReplies() ||
(bool)$this->getPublicReplyHandlerEmailAddress();
}
public function getPublicReplyHandlerEmailAddress() {
return null;
}
final public function multiplexMail(
PhabricatorMetaMTAMail $mail_template,
array $to_handles,
array $cc_handles) {
$result = array();
// If private replies are not supported, simply send one email to all
// recipients and CCs. This covers cases where we have no reply handler,
// or we have a public reply handler.
if (!$this->supportsPrivateReplies()) {
$mail = clone $mail_template;
$mail->addTos(mpull($to_handles, 'getPHID'));
$mail->addCCs(mpull($cc_handles, 'getPHID'));
$reply_to = $this->getPublicReplyHandlerEmailAddress();
if ($reply_to) {
$mail->setReplyTo($reply_to);
}
$result[] = $mail;
return $result;
}
// Merge all the recipients together. TODO: We could keep the CCs as real
// CCs and send to a "noreply@domain.com" type address, but keep it simple
// for now.
$recipients = mpull($to_handles, null, 'getPHID') +
mpull($cc_handles, null, 'getPHID');
// This grouping is just so we can use the public reply-to for any
// recipients without a private reply-to, e.g. mailing lists.
$groups = array();
foreach ($recipients as $recipient) {
$private = $this->getPrivateReplyHandlerEmailAddress($recipient);
$groups[$private][] = $recipient;
}
// When multiplexing mail, explicitly include To/Cc information in the
// message body and headers.
$add_headers = array();
$body = $mail_template->getBody();
$body .= "\n";
if ($to_handles) {
$body .= "To: ".implode(', ', mpull($to_handles, 'getName'))."\n";
$add_headers['X-Phabricator-To'] = $this->formatPHIDList($to_handles);
}
if ($cc_handles) {
$body .= "Cc: ".implode(', ', mpull($cc_handles, 'getName'))."\n";
$add_headers['X-Phabricator-Cc'] = $this->formatPHIDList($cc_handles);
}
foreach ($groups as $reply_to => $group) {
$mail = clone $mail_template;
$mail->addTos(mpull($group, 'getPHID'));
$mail->setBody($body);
foreach ($add_headers as $header => $value) {
$mail->addHeader($header, $value);
}
if (!$reply_to) {
$reply_to = $this->getPublicReplyHandlerEmailAddress();
}
if ($reply_to) {
$mail->setReplyTo($reply_to);
}
$result[] = $mail;
}
return $result;
}
protected function formatPHIDList(array $handles) {
$list = array();
foreach ($handles as $handle) {
$list[] = '<'.$handle->getPHID().'>';
}
return implode(', ', $list);
}
protected function getDefaultPrivateReplyHandlerEmailAddress(
PhabricatorObjectHandle $handle,
$prefix) {
if ($handle->getType() != PhabricatorPHIDConstants::PHID_TYPE_USER) {
// You must be a real user to get a private reply handler address.
return null;
}
$receiver = $this->getMailReceiver();
$receiver_id = $receiver->getID();
$user_id = $handle->getAlternateID();
$hash = PhabricatorMetaMTAReceivedMail::computeMailHash(
$receiver->getMailKey(),
$handle->getPHID());
$domain = $this->getReplyHandlerDomain();
return "{$prefix}{$receiver_id}+{$user_id}+{$hash}@{$domain}";
}
}

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