PhabricatorMailReplyHandler.php
4d22c9104f16master

PhabricatorMailReplyHandler.php
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			<?php

			abstract class PhabricatorMailReplyHandler {

			private $mailReceiver;
			private $actor;
			private $excludePHIDs = array();

			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;
			}

			final public function setExcludeMailRecipientPHIDs(array $exclude) {
			$this->excludePHIDs = $exclude;
			return $this;
			}

			final public function getExcludeMailRecipientPHIDs() {
			return $this->excludePHIDs;
			}

			abstract public function validateMailReceiver($mail_receiver);
			abstract public function getPrivateReplyHandlerEmailAddress(
			PhabricatorObjectHandle $handle);
			public function getReplyHandlerDomain() {
			return PhabricatorEnv::getEnvConfig(
			'metamta.reply-handler-domain'
			);
			}
			abstract public function getReplyHandlerInstructions();
			abstract protected function receiveEmail(
			PhabricatorMetaMTAReceivedMail $mail);

			public function processEmail(PhabricatorMetaMTAReceivedMail $mail) {
			$error = $this->sanityCheckEmail($mail);

			if ($error) {
			if ($this->shouldSendErrorEmail($mail)) {
			$this->sendErrorEmail($error, $mail);
			}
			return null;
			}

			return $this->receiveEmail($mail);
			}

			private function sanityCheckEmail(PhabricatorMetaMTAReceivedMail $mail) {
			$body = $mail->getCleanTextBody();
			$attachments = $mail->getAttachments();

			if (empty($body) && empty($attachments)) {
			return 'Empty email body. Email should begin with an !action and / or '.
			'text to comment. Inline replies and signatures are ignored.';
			}

			return null;
			}

			/**
			* Only send an error email if the user is talking to just Phabricator. We
			* can assume if there is only one To address it is a Phabricator address
			* since this code is running and everything.
			*/
			private function shouldSendErrorEmail(PhabricatorMetaMTAReceivedMail $mail) {
			return (count($mail->getToAddresses()) == 1) &&
			(count($mail->getCCAddresses()) == 0);
			}

			private function sendErrorEmail($error,
			PhabricatorMetaMTAReceivedMail $mail) {
			$template = new PhabricatorMetaMTAMail();
			$template->setSubject('Exception: unable to process your mail request');
			$template->setBody($this->buildErrorMailBody($error, $mail));
			$template->setRelatedPHID($mail->getRelatedPHID());
			$phid = $this->getActor()->getPHID();
			$tos = array(
			$phid => PhabricatorObjectHandleData::loadOneHandle($phid)
			);
			$mails = $this->multiplexMail($template, $tos, array());

			foreach ($mails as $email) {
			$email->saveAndSend();
			}

			return true;
			}

			private function buildErrorMailBody($error,
			PhabricatorMetaMTAReceivedMail $mail) {
			$original_body = $mail->getRawTextBody();

			$main_body = <<<EOBODY
			Your request failed because an error was encoutered while processing it:

			ERROR: {$error}

			-- Original Body -------------------------------------------------------------

			{$original_body}

			EOBODY;

			$body = new PhabricatorMetaMTAMailBody();
			$body->addRawSection($main_body);
			$body->addReplySection($this->getReplyHandlerInstructions());

			return $body->render();
			}

			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;
			}

			final public function getRecipientsSummary(
			array $to_handles,
			array $cc_handles) {
			assert_instances_of($to_handles, 'PhabricatorObjectHandle');
			assert_instances_of($cc_handles, 'PhabricatorObjectHandle');

			$body = '';

			if (PhabricatorEnv::getEnvConfig('metamta.recipients.show-hints')) {
			if ($to_handles) {
			$body .= "To: ".implode(', ', mpull($to_handles, 'getName'))."\n";
			}
			if ($cc_handles) {
			$body .= "Cc: ".implode(', ', mpull($cc_handles, 'getName'))."\n";
			}
			}

			return $body;
			}

			final public function multiplexMail(
			PhabricatorMetaMTAMail $mail_template,
			array $to_handles,
			array $cc_handles) {
			assert_instances_of($to_handles, 'PhabricatorObjectHandle');
			assert_instances_of($cc_handles, 'PhabricatorObjectHandle');

			$result = array();

			// If MetaMTA is configured to always multiplex, skip the single-email
			// case.
			if (!PhabricatorMetaMTAMail::shouldMultiplexAllMail()) {
			// 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'));

			if ($this->supportsPublicReplies()) {
			$reply_to = $this->getPublicReplyHandlerEmailAddress();
			$mail->setReplyTo($reply_to);
			}

			$result[] = $mail;

			return $result;
			}
			}

			$tos = mpull($to_handles, null, 'getPHID');
			$ccs = mpull($cc_handles, null, 'getPHID');

			// 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 = $tos + $ccs;

			// When multiplexing mail, explicitly include To/Cc information in the
			// message body and headers.

			$mail_template = clone $mail_template;

			$mail_template->addPHIDHeaders('X-Phabricator-To', array_keys($tos));
			$mail_template->addPHIDHeaders('X-Phabricator-Cc', array_keys($ccs));

			$body = $mail_template->getBody();
			$body .= "\n";
			$body .= $this->getRecipientsSummary($to_handles, $cc_handles);

			foreach ($recipients as $phid => $recipient) {
			$mail = clone $mail_template;
			if (isset($to_handles[$phid])) {
			$mail->addTos(array($phid));
			} else if (isset($cc_handles[$phid])) {
			$mail->addCCs(array($phid));
			} else {
			// not good - they should be a to or a cc
			continue;
			}

			$mail->setBody($body);

			$reply_to = null;
			if (!$reply_to && $this->supportsPrivateReplies()) {
			$reply_to = $this->getPrivateReplyHandlerEmailAddress($recipient);
			}

			if (!$reply_to && $this->supportsPublicReplies()) {
			$reply_to = $this->getPublicReplyHandlerEmailAddress();
			}

			if ($reply_to) {
			$mail->setReplyTo($reply_to);
			}

			$result[] = $mail;
			}

			return $result;
			}

			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...
			$hash = PhabricatorMetaMTAReceivedMail::computeMailHash(
			$receiver->getMailKey(),
			$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(
			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();

			$address = "{$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 PhabricatorFile())
			->loadAllWhere('phid in (%Ls)', $attachments);

			// if we have some text then double return before adding our file list
			if ($body) {
			$body .= "\n\n";
			}

			foreach ($files as $file) {
			$file_str = sprintf('- {F%d, layout=link}', $file->getID());
			$body .= $file_str."\n";
			}

			return rtrim($body);
			}

			}

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phorge/src/applications/metamta/replyhandler/PhabricatorMailReplyHandler.php4d22c9104f16master

PhabricatorMailReplyHandler.phpView Options

Owner Packages

phorge/src/applications/metamta/replyhandler/PhabricatorMailReplyHandler.php
4d22c9104f16master

PhabricatorMailReplyHandler.php
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