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phorge/src/applications/metamta/replyhandler/PhabricatorMailReplyHandler.php
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PhabricatorMailReplyHandler.php
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<?php
abstract class PhabricatorMailReplyHandler extends Phobject {
private $mailReceiver;
private $applicationEmail;
private $actor;
private $excludePHIDs = array();
private $unexpandablePHIDs = array();
final public function setMailReceiver($mail_receiver) {
$this->validateMailReceiver($mail_receiver);
$this->mailReceiver = $mail_receiver;
return $this;
}
final public function getMailReceiver() {
return $this->mailReceiver;
}
public function setApplicationEmail(
PhabricatorMetaMTAApplicationEmail $email) {
$this->applicationEmail = $email;
return $this;
}
public function getApplicationEmail() {
return $this->applicationEmail;
}
final public function setActor(PhabricatorUser $actor) {
$this->actor = $actor;
return $this;
}
final public function getActor() {
return $this->actor;
}
final public function setExcludeMailRecipientPHIDs(array $exclude) {
$this->excludePHIDs = $exclude;
return $this;
}
final public function getExcludeMailRecipientPHIDs() {
return $this->excludePHIDs;
}
public function setUnexpandablePHIDs(array $phids) {
$this->unexpandablePHIDs = $phids;
return $this;
}
public function getUnexpandablePHIDs() {
return $this->unexpandablePHIDs;
}
abstract public function validateMailReceiver($mail_receiver);
abstract public function getPrivateReplyHandlerEmailAddress(
PhabricatorUser $user);
public function getReplyHandlerDomain() {
return PhabricatorEnv::getEnvConfig('metamta.reply-handler-domain');
}
abstract protected function receiveEmail(
PhabricatorMetaMTAReceivedMail $mail);
public function processEmail(PhabricatorMetaMTAReceivedMail $mail) {
return $this->receiveEmail($mail);
}
public function supportsPrivateReplies() {
return (bool)$this->getReplyHandlerDomain() &&
!$this->supportsPublicReplies();
}
public function supportsPublicReplies() {
if (!PhabricatorEnv::getEnvConfig('metamta.public-replies')) {
return false;
}
if (!$this->getReplyHandlerDomain()) {
return false;
}
return (bool)$this->getPublicReplyHandlerEmailAddress();
}
final public function supportsReplies() {
return $this->supportsPrivateReplies() ||
$this->supportsPublicReplies();
}
public function getPublicReplyHandlerEmailAddress() {
return null;
}
protected function getDefaultPublicReplyHandlerEmailAddress($prefix) {
$receiver = $this->getMailReceiver();
$receiver_id = $receiver->getID();
$domain = $this->getReplyHandlerDomain();
// We compute a hash using the object's own PHID to prevent an attacker
// from blindly interacting with objects that they haven't ever received
// mail about by just sending to D1@, D2@, etc...
$mail_key = PhabricatorMetaMTAMailProperties::loadMailKey($receiver);
$hash = PhabricatorObjectMailReceiver::computeMailHash(
$mail_key,
$receiver->getPHID());
$address = "{$prefix}{$receiver_id}+public+{$hash}@{$domain}";
return $this->getSingleReplyHandlerPrefix($address);
}
protected function getSingleReplyHandlerPrefix($address) {
$single_handle_prefix = PhabricatorEnv::getEnvConfig(
'metamta.single-reply-handler-prefix');
return ($single_handle_prefix)
? $single_handle_prefix.'+'.$address
: $address;
}
protected function getDefaultPrivateReplyHandlerEmailAddress(
PhabricatorUser $user,
$prefix) {
$receiver = $this->getMailReceiver();
$receiver_id = $receiver->getID();
$user_id = $user->getID();
$mail_key = PhabricatorMetaMTAMailProperties::loadMailKey($receiver);
$hash = PhabricatorObjectMailReceiver::computeMailHash(
$mail_key,
$user->getPHID());
$domain = $this->getReplyHandlerDomain();
$address = "{$prefix}{$receiver_id}+{$user_id}+{$hash}@{$domain}";
return $this->getSingleReplyHandlerPrefix($address);
}
final protected function enhanceBodyWithAttachments(
$body,
array $attachments) {
if (!$attachments) {
return $body;
}
$files = id(new PhabricatorFileQuery())
->setViewer($this->getActor())
->withPHIDs($attachments)
->execute();
$output = array();
$output[] = $body;
// We're going to put all the non-images first in a list, then embed
// the images.
$head = array();
$tail = array();
foreach ($files as $file) {
if ($file->isViewableImage()) {
$tail[] = $file;
} else {
$head[] = $file;
}
}
if ($head) {
$list = array();
foreach ($head as $file) {
$list[] = ' - {'.$file->getMonogram().', layout=link}';
}
$output[] = implode("\n", $list);
}
if ($tail) {
$list = array();
foreach ($tail as $file) {
$list[] = '{'.$file->getMonogram().'}';
}
$output[] = implode("\n\n", $list);
}
$output = implode("\n\n", $output);
return rtrim($output);
}
/**
* Produce a list of mail targets for a given to/cc list.
*
* Each target should be sent a separate email, and contains the information
* required to generate it with appropriate permissions and configuration.
*
* @param list<phid> $raw_to List of "To" PHIDs.
* @param list<phid> $raw_cc List of "CC" PHIDs.
* @return list<PhabricatorMailTarget> List of targets.
*/
final public function getMailTargets(array $raw_to, array $raw_cc) {
list($to, $cc) = $this->expandRecipientPHIDs($raw_to, $raw_cc);
list($to, $cc) = $this->loadRecipientUsers($to, $cc);
list($to, $cc) = $this->filterRecipientUsers($to, $cc);
if (!$to && !$cc) {
return array();
}
$template = id(new PhabricatorMailTarget())
->setRawToPHIDs($raw_to)
->setRawCCPHIDs($raw_cc);
// Set the public reply address as the default, if one exists. We
// might replace this with a private address later.
if ($this->supportsPublicReplies()) {
$reply_to = $this->getPublicReplyHandlerEmailAddress();
if ($reply_to) {
$template->setReplyTo($reply_to);
}
}
$supports_private_replies = $this->supportsPrivateReplies();
$mail_all = !PhabricatorEnv::getEnvConfig('metamta.one-mail-per-recipient');
$targets = array();
if ($mail_all) {
$target = id(clone $template)
->setViewer(PhabricatorUser::getOmnipotentUser())
->setToMap($to)
->setCCMap($cc);
$targets[] = $target;
} else {
$map = $to + $cc;
foreach ($map as $phid => $user) {
// Preserve the original To/Cc information on the target.
if (isset($to[$phid])) {
$target_to = array($phid => $user);
$target_cc = array();
} else {
$target_to = array();
$target_cc = array($phid => $user);
}
$target = id(clone $template)
->setViewer($user)
->setToMap($target_to)
->setCCMap($target_cc);
if ($supports_private_replies) {
$reply_to = $this->getPrivateReplyHandlerEmailAddress($user);
if ($reply_to) {
$target->setReplyTo($reply_to);
}
}
$targets[] = $target;
}
}
return $targets;
}
/**
* Expand lists of recipient PHIDs.
*
* This takes any compound recipients (like projects) and looks up all their
* members.
*
* @param list<phid> $to List of To PHIDs.
* @param list<phid> $cc List of CC PHIDs.
* @return pair<list<phid>, list<phid>> Expanded PHID lists.
*/
private function expandRecipientPHIDs(array $to, array $cc) {
$to_result = array();
$cc_result = array();
// "Unexpandable" users have disengaged from an object (for example,
// by resigning from a revision).
// If such a user is still a direct recipient (for example, they're still
// on the Subscribers list) they're fair game, but group targets (like
// projects) will no longer include them when expanded.
$unexpandable = $this->getUnexpandablePHIDs();
$unexpandable = array_fuse($unexpandable);
$all_phids = array_merge($to, $cc);
if ($all_phids) {
$map = id(new PhabricatorMetaMTAMemberQuery())
->setViewer(PhabricatorUser::getOmnipotentUser())
->withPHIDs($all_phids)
->execute();
foreach ($to as $phid) {
foreach ($map[$phid] as $expanded) {
if ($expanded !== $phid) {
if (isset($unexpandable[$expanded])) {
continue;
}
}
$to_result[$expanded] = $expanded;
}
}
foreach ($cc as $phid) {
foreach ($map[$phid] as $expanded) {
if ($expanded !== $phid) {
if (isset($unexpandable[$expanded])) {
continue;
}
}
$cc_result[$expanded] = $expanded;
}
}
}
// Remove recipients from "CC" if they're also present in "To".
$cc_result = array_diff_key($cc_result, $to_result);
return array(array_values($to_result), array_values($cc_result));
}
/**
* Load @{class:PhabricatorUser} objects for each recipient.
*
* Invalid recipients are dropped from the results.
*
* @param list<phid> $to List of To PHIDs.
* @param list<phid> $cc List of CC PHIDs.
* @return pair<wild, wild> Maps from PHIDs to users.
*/
private function loadRecipientUsers(array $to, array $cc) {
$to_result = array();
$cc_result = array();
$all_phids = array_merge($to, $cc);
if ($all_phids) {
// We need user settings here because we'll check translations later
// when generating mail.
$users = id(new PhabricatorPeopleQuery())
->setViewer(PhabricatorUser::getOmnipotentUser())
->withPHIDs($all_phids)
->needUserSettings(true)
->execute();
$users = mpull($users, null, 'getPHID');
foreach ($to as $phid) {
if (isset($users[$phid])) {
$to_result[$phid] = $users[$phid];
}
}
foreach ($cc as $phid) {
if (isset($users[$phid])) {
$cc_result[$phid] = $users[$phid];
}
}
}
return array($to_result, $cc_result);
}
/**
* Remove recipients who do not have permission to view the mail receiver.
*
* @param map<string, PhabricatorUser> $to Map of "To" users.
* @param map<string, PhabricatorUser> $cc Map of "CC" users.
* @return pair<wild, wild> Filtered user maps.
*/
private function filterRecipientUsers(array $to, array $cc) {
$to_result = array();
$cc_result = array();
$all_users = $to + $cc;
if ($all_users) {
$can_see = array();
$object = $this->getMailReceiver();
foreach ($all_users as $phid => $user) {
$visible = PhabricatorPolicyFilter::hasCapability(
$user,
$object,
PhabricatorPolicyCapability::CAN_VIEW);
if ($visible) {
$can_see[$phid] = true;
}
}
foreach ($to as $phid => $user) {
if (!empty($can_see[$phid])) {
$to_result[$phid] = $all_users[$phid];
}
}
foreach ($cc as $phid => $user) {
if (!empty($can_see[$phid])) {
$cc_result[$phid] = $all_users[$phid];
}
}
}
return array($to_result, $cc_result);
}
}

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