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PhabricatorMetaMTAMail.php
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PhabricatorMetaMTAMail.php
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			<?php

			/*
			* Copyright 2012 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.
			*/

			/**
			* See #394445 for an explanation of why this thing even exists.
			*/
			final class PhabricatorMetaMTAMail extends PhabricatorMetaMTADAO {

			const STATUS_QUEUE = 'queued';
			const STATUS_SENT = 'sent';
			const STATUS_FAIL = 'fail';
			const STATUS_VOID = 'void';

			const MAX_RETRIES = 250;
			const RETRY_DELAY = 5;

			protected $parameters;
			protected $status;
			protected $message;
			protected $retryCount;
			protected $nextRetry;
			protected $relatedPHID;

			public function __construct() {

			$this->status = self::STATUS_QUEUE;
			$this->retryCount = 0;
			$this->nextRetry = time();
			$this->parameters = array();

			parent::__construct();
			}

			public function getConfiguration() {
			return array(
			self::CONFIG_SERIALIZATION => array(
			'parameters' => self::SERIALIZATION_JSON,
			),
			) + parent::getConfiguration();
			}

			protected function setParam($param, $value) {
			$this->parameters[$param] = $value;
			return $this;
			}

			protected function getParam($param) {
			return idx($this->parameters, $param);
			}

			/**
			* Set tags (@{class:MetaMTANotificationType} constants) which identify the
			* content of this mail in a general way. These tags are used to allow users
			* to opt out of receiving certain types of mail, like updates when a task's
			* projects change.
			*
			* @param list<const> List of @{class:MetaMTANotificationType} constants.
			* @return this
			*/
			public function setMailTags(array $tags) {
			$this->setParam('mailtags', $tags);
			return $this;
			}

			/**
			* In Gmail, conversations will be broken if you reply to a thread and the
			* server sends back a response without referencing your Message-ID, even if
			* it references a Message-ID earlier in the thread. To avoid this, use the
			* parent email's message ID explicitly if it's available. This overwrites the
			* "In-Reply-To" and "References" headers we would otherwise generate. This
			* needs to be set whenever an action is triggered by an email message. See
			* T251 for more details.
			*
			* @param string The "Message-ID" of the email which precedes this one.
			* @return this
			*/
			public function setParentMessageID($id) {
			$this->setParam('parent-message-id', $id);
			return $this;
			}

			public function getParentMessageID() {
			return $this->getParam('parent-message-id');
			}

			public function getSubject() {
			return $this->getParam('subject');
			}

			public function addTos(array $phids) {
			$phids = array_unique($phids);
			$this->setParam('to', $phids);
			return $this;
			}

			public function addCCs(array $phids) {
			$phids = array_unique($phids);
			$this->setParam('cc', $phids);
			return $this;
			}

			public function addHeader($name, $value) {
			$this->parameters['headers'][$name] = $value;
			return $this;
			}

			public function addAttachment(PhabricatorMetaMTAAttachment $attachment) {
			$this->parameters['attachments'][] = $attachment;
			return $this;
			}

			public function getAttachments() {
			return $this->getParam('attachments');
			}

			public function setAttachments(array $attachments) {
			$this->setParam('attachments', $attachments);
			return $this;
			}

			public function setFrom($from) {
			$this->setParam('from', $from);
			return $this;
			}

			public function setReplyTo($reply_to) {
			$this->setParam('reply-to', $reply_to);
			return $this;
			}

			public function setSubject($subject) {
			$this->setParam('subject', $subject);
			return $this;
			}

			public function setBody($body) {
			$this->setParam('body', $body);
			return $this;
			}

			public function getBody() {
			return $this->getParam('body');
			}

			public function setIsHTML($html) {
			$this->setParam('is-html', $html);
			return $this;
			}

			public function getSimulatedFailureCount() {
			return nonempty($this->getParam('simulated-failures'), 0);
			}

			public function setSimulatedFailureCount($count) {
			$this->setParam('simulated-failures', $count);
			return $this;
			}

			public function getWorkerTaskID() {
			return $this->getParam('worker-task');
			}

			public function setWorkerTaskID($id) {
			$this->setParam('worker-task', $id);
			return $this;
			}

			/**
			* Flag that this is an auto-generated bulk message and should have bulk
			* headers added to it if appropriate. Broadly, this means some flavor of
			* "Precedence: bulk" or similar, but is implementation and configuration
			* dependent.
			*
			* @param bool True if the mail is automated bulk mail.
			* @return this
			*/
			public function setIsBulk($is_bulk) {
			$this->setParam('is-bulk', $is_bulk);
			return $this;
			}

			/**
			* Use this method to set an ID used for message threading. MetaMTA will
			* set appropriate headers (Message-ID, In-Reply-To, References and
			* Thread-Index) based on the capabilities of the underlying mailer.
			*
			* @param string Unique identifier, appropriate for use in a Message-ID,
			* In-Reply-To or References headers.
			* @param bool If true, indicates this is the first message in the thread.
			* @return this
			*/
			public function setThreadID($thread_id, $is_first_message = false) {
			$this->setParam('thread-id', $thread_id);
			$this->setParam('is-first-message', $is_first_message);
			return $this;
			}

			/**
			* Save a newly created mail to the database and attempt to send it
			* immediately if the server is configured for immediate sends. When
			* applications generate new mail they should generally use this method to
			* deliver it. If the server doesn't use immediate sends, this has the same
			* effect as calling save(): the mail will eventually be delivered by the
			* MetaMTA daemon.
			*
			* @return this
			*/
			public function saveAndSend() {
			$ret = null;

			if (PhabricatorEnv::getEnvConfig('metamta.send-immediately')) {
			$ret = $this->sendNow();
			} else {
			$ret = $this->save();
			}

			return $ret;
			}

			protected function didWriteData() {
			parent::didWriteData();

			if (!$this->getWorkerTaskID()) {
			$mailer_task = new PhabricatorWorkerTask();
			$mailer_task->setTaskClass('PhabricatorMetaMTAWorker');
			$mailer_task->setData($this->getID());
			$mailer_task->save();
			$this->setWorkerTaskID($mailer_task->getID());
			$this->save();
			}
			}


			public function buildDefaultMailer() {
			$class_name = PhabricatorEnv::getEnvConfig('metamta.mail-adapter');
			PhutilSymbolLoader::loadClass($class_name);
			return newv($class_name, array());
			}

			/**
			* Attempt to deliver an email immediately, in this process.
			*
			* @param bool Try to deliver this email even if it has already been
			* delivered or is in backoff after a failed delivery attempt.
			* @param PhabricatorMailImplementationAdapter Use a specific mail adapter,
			* instead of the default.
			*
			* @return void
			*/
			public function sendNow(
			$force_send = false,
			PhabricatorMailImplementationAdapter $mailer = null) {

			if ($mailer === null) {
			$mailer = $this->buildDefaultMailer();
			}

			if (!$force_send) {
			if ($this->getStatus() != self::STATUS_QUEUE) {
			throw new Exception("Trying to send an already-sent mail!");
			}

			if (time() < $this->getNextRetry()) {
			throw new Exception("Trying to send an email before next retry!");
			}
			}

			try {
			$parameters = $this->parameters;
			$phids = array();
			foreach ($parameters as $key => $value) {
			switch ($key) {
			case 'from':
			case 'to':
			case 'cc':
			if (!is_array($value)) {
			$value = array($value);
			}
			foreach (array_filter($value) as $phid) {
			$phids[] = $phid;
			}
			break;
			}
			}

			$handles = id(new PhabricatorObjectHandleData($phids))
			->loadHandles();

			$exclude = array();

			$params = $this->parameters;
			$default = PhabricatorEnv::getEnvConfig('metamta.default-address');
			if (empty($params['from'])) {
			$mailer->setFrom($default);
			} else {
			$from = $params['from'];

			// If the user has set their preferences to not send them email about
			// things they do, exclude them from being on To or Cc.
			$from_user = id(new PhabricatorUser())->loadOneWhere(
			'phid = %s',
			$from);
			if ($from_user) {
			$pref_key = PhabricatorUserPreferences::PREFERENCE_NO_SELF_MAIL;
			$exclude_self = $from_user
			->loadPreferences()
			->getPreference($pref_key);
			if ($exclude_self) {
			$exclude[$from] = true;
			}
			}

			if (!PhabricatorEnv::getEnvConfig('metamta.can-send-as-user')) {
			$handle = $handles[$from];
			if (empty($params['reply-to'])) {
			$params['reply-to'] = $handle->getEmail();
			$params['reply-to-name'] = $handle->getFullName();
			}
			$mailer->setFrom(
			$default,
			$handle->getFullName());
			unset($params['from']);
			}
			}

			$is_first = idx($params, 'is-first-message');
			unset($params['is-first-message']);

			$is_threaded = (bool)idx($params, 'thread-id');

			$reply_to_name = idx($params, 'reply-to-name', '');
			unset($params['reply-to-name']);

			$add_cc = array();
			$add_to = array();

			foreach ($params as $key => $value) {
			switch ($key) {
			case 'from':
			$mailer->setFrom($handles[$value]->getEmail());
			break;
			case 'reply-to':
			$mailer->addReplyTo($value, $reply_to_name);
			break;
			case 'to':
			$emails = $this->getDeliverableEmailsFromHandles(
			$value,
			$handles,
			$exclude);
			if ($emails) {
			$add_to = $emails;
			}
			break;
			case 'cc':
			$emails = $this->getDeliverableEmailsFromHandles(
			$value,
			$handles,
			$exclude);
			if ($emails) {
			$add_cc = $emails;
			}
			break;
			case 'headers':
			foreach ($value as $header_key => $header_value) {
			// NOTE: If we have \n in a header, SES rejects the email.
			$header_value = str_replace("\n", " ", $header_value);

			$mailer->addHeader($header_key, $header_value);
			}
			break;
			case 'attachments':
			foreach ($value as $attachment) {
			$mailer->addAttachment(
			$attachment->getData(),
			$attachment->getFilename(),
			$attachment->getMimeType()
			);
			}
			break;
			case 'body':
			$mailer->setBody($value);
			break;
			case 'subject':
			if ($is_threaded) {
			$add_re = PhabricatorEnv::getEnvConfig('metamta.re-prefix');

			// If this message has a single recipient, respect their "Re:"
			// preference. Otherwise, use the global setting.

			$to = idx($params, 'to', array());
			$cc = idx($params, 'cc', array());
			if (count($to) == 1 && count($cc) == 0) {
			$user = id(new PhabricatorUser())->loadOneWhere(
			'phid = %s',
			head($to));
			if ($user) {
			$prefs = $user->loadPreferences();
			$pref_key = PhabricatorUserPreferences::PREFERENCE_RE_PREFIX;
			$add_re = $prefs->getPreference($pref_key, $add_re);
			}
			}

			if ($add_re) {
			$value = 'Re: '.$value;
			}
			}

			$mailer->setSubject($value);
			break;
			case 'is-html':
			if ($value) {
			$mailer->setIsHTML(true);
			}
			break;
			case 'is-bulk':
			if ($value) {
			if (PhabricatorEnv::getEnvConfig('metamta.precedence-bulk')) {
			$mailer->addHeader('Precedence', 'bulk');
			}
			}
			break;
			case 'thread-id':
			if ($is_first && $mailer->supportsMessageIDHeader()) {
			$mailer->addHeader('Message-ID', $value);
			} else {
			$in_reply_to = $value;
			$references = array($value);
			$parent_id = $this->getParentMessageID();
			if ($parent_id) {
			$in_reply_to = $parent_id;
			// By RFC 2822, the most immediate parent should appear last
			// in the "References" header, so this order is intentional.
			$references[] = $parent_id;
			}
			$references = implode(' ', $references);
			$mailer->addHeader('In-Reply-To', $in_reply_to);
			$mailer->addHeader('References', $references);
			}
			$thread_index = $this->generateThreadIndex($value, $is_first);
			$mailer->addHeader('Thread-Index', $thread_index);
			break;
			case 'mailtags':
			// Handled below.
			break;
			default:
			// Just discard.
			}
			}

			$mailer->addHeader('X-Phabricator-Sent-This-Message', 'Yes');
			$mailer->addHeader('X-Mail-Transport-Agent', 'MetaMTA');

			// If the message has mailtags, filter out any recipients who don't want
			// to receive this type of mail.
			$mailtags = $this->getParam('mailtags');
			if ($mailtags && ($add_to \|\| $add_cc)) {

			$tag_header = array();
			foreach ($mailtags as $mailtag) {
			$tag_header[] = '<'.$mailtag.'>';
			}
			$tag_header = implode(', ', $tag_header);
			$mailer->addHeader('X-Phabricator-Mail-Tags', $tag_header);

			$exclude = array();

			$all_recipients = array_merge(
			array_keys($add_to),
			array_keys($add_cc));

			$all_prefs = id(new PhabricatorUserPreferences())->loadAllWhere(
			'userPHID in (%Ls)',
			$all_recipients);
			$all_prefs = mpull($all_prefs, null, 'getUserPHID');

			foreach ($all_recipients as $recipient) {
			$prefs = idx($all_prefs, $recipient);
			if (!$prefs) {
			continue;
			}

			$user_mailtags = $prefs->getPreference(
			PhabricatorUserPreferences::PREFERENCE_MAILTAGS,
			array());

			// The user must have elected to receive mail for at least one
			// of the mailtags.
			$send = false;
			foreach ($mailtags as $tag) {
			if (idx($user_mailtags, $tag, true)) {
			$send = true;
			break;
			}
			}

			if (!$send) {
			$exclude[$recipient] = true;
			}
			}

			$add_to = array_diff_key($add_to, $exclude);
			$add_cc = array_diff_key($add_cc, $exclude);
			}


			if ($add_to) {
			$mailer->addTos($add_to);
			if ($add_cc) {
			$mailer->addCCs($add_cc);
			}
			} else if ($add_cc) {
			// If we have CC addresses but no "to" address, promote the CCs to
			// "to".
			$mailer->addTos($add_cc);
			} else {
			$this->setStatus(self::STATUS_VOID);
			$this->setMessage(
			"Message has no valid recipients: all To/CC are disabled or ".
			"configured not to receive this mail.");
			return $this->save();
			}

			} catch (Exception $ex) {
			$this->setStatus(self::STATUS_FAIL);
			$this->setMessage($ex->getMessage());
			return $this->save();
			}

			if ($this->getRetryCount() < $this->getSimulatedFailureCount()) {
			$ok = false;
			$error = 'Simulated failure.';
			} else {
			try {
			$ok = $mailer->send();
			$error = null;
			} catch (Exception $ex) {
			$ok = false;
			$error = $ex->getMessage()."\n".$ex->getTraceAsString();
			}
			}

			if (!$ok) {
			$this->setMessage($error);
			if ($this->getRetryCount() > self::MAX_RETRIES) {
			$this->setStatus(self::STATUS_FAIL);
			} else {
			$this->setRetryCount($this->getRetryCount() + 1);
			$next_retry = time() + ($this->getRetryCount() * self::RETRY_DELAY);
			$this->setNextRetry($next_retry);
			}
			} else {
			$this->setStatus(self::STATUS_SENT);
			}

			return $this->save();
			}

			public static function getReadableStatus($status_code) {
			static $readable = array(
			self::STATUS_QUEUE => "Queued for Delivery",
			self::STATUS_FAIL => "Delivery Failed",
			self::STATUS_SENT => "Sent",
			self::STATUS_VOID => "Void",
			);
			$status_code = coalesce($status_code, '?');
			return idx($readable, $status_code, $status_code);
			}

			private function generateThreadIndex($seed, $is_first_mail) {
			// When threading, Outlook ignores the 'References' and 'In-Reply-To'
			// headers that most clients use. Instead, it uses a custom 'Thread-Index'
			// header. The format of this header is something like this (from
			// camel-exchange-folder.c in Evolution Exchange):

			/* A new post to a folder gets a 27-byte-long thread index. (The value
			* is apparently unique but meaningless.) Each reply to a post gets a
			* 32-byte-long thread index whose first 27 bytes are the same as the
			* parent's thread index. Each reply to any of those gets a
			* 37-byte-long thread index, etc. The Thread-Index header contains a
			* base64 representation of this value.
			*/

			// The specific implementation uses a 27-byte header for the first email
			// a recipient receives, and a random 5-byte suffix (32 bytes total)
			// thereafter. This means that all the replies are (incorrectly) siblings,
			// but it would be very difficult to keep track of the entire tree and this
			// gets us reasonable client behavior.

			$base = substr(md5($seed), 0, 27);
			if (!$is_first_mail) {
			// Not totally sure, but it seems like outlook orders replies by
			// thread-index rather than timestamp, so to get these to show up in the
			// right order we use the time as the last 4 bytes.
			$base .= ' '.pack('N', time());
			}

			return base64_encode($base);
			}

			private function getDeliverableEmailsFromHandles(
			array $phids,
			array $handles,
			array $exclude) {

			$emails = array();
			foreach ($phids as $phid) {
			if ($handles[$phid]->isDisabled()) {
			continue;
			}
			if (!$handles[$phid]->isComplete()) {
			continue;
			}
			if (isset($exclude[$phid])) {
			continue;
			}
			$emails[$phid] = $handles[$phid]->getEmail();
			}

			return $emails;
			}

			}

phab/src/applications/metamta/storage/mail/PhabricatorMetaMTAMail.phpd0af617818b6production

PhabricatorMetaMTAMail.phpView Options

phab/src/applications/metamta/storage/mail/PhabricatorMetaMTAMail.php
d0af617818b6production

PhabricatorMetaMTAMail.php
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